Innovative Construction Technologies Research Articles

Experimental study on rotary inter-module connections with corrosion-resistant metal materials: Under axial tension

Modular construction is an innovative construction technology that has attracted considerable attention for its pronounced advantages in reducing reliance on on-site labor, speeding up construction, enhancing productivity, and ensuring superior quality. To extend the applicability of modular construction to structures in corrosive environments, such as ocean floating structures for exploring renewable energy, a rotary inter-module connection employing corrosion-resistant metal materials was proposed herein. Six full-scale inter-module connection specimens made of grade S30408 austenitic stainless steel, grade S220503 duplex stainless steel, and grade A96061-T6 aluminum alloy were tested under axial tension. The load-displacement relationships of each specimen were recorded to enable a thorough analysis of the strength, stiffness, and ductility of the tested specimens. As compared to the conventional carbon steel counterparts, the stainless steel specimens showed superior load-bearing capacity with improved ductility, while the aluminum alloy specimens experienced brittle fracture at the bolt shank-bottom plate junction with reduced load-bearing capacity. Three typical failure modes were identified in the experimental study, namely, plastification of the connector and lower corner fitting, plastification of the connector and both corner fittings, and fracture of the bolt. The load-strain relationships of each specimen were also discussed to analyze the load transfer mechanism and structural behavior of the connection. In addition, the applicability and accuracy of the simplified calculation methods based on beam bending theory and Navier solution for rectangular thin plates, respectively, were discussed based on the test results.

The Role of Different Clay Types in Achieving Low-Carbon 3D Printed Concretes

Concrete 3D printing, an innovative construction technology, offers reduced material waste, increased construction speed, and the ability to create complex and customized shapes that are challenging to achieve with traditional methods. This study delves into the unique fresh-state performance required for 3D printing concrete, discussing buildability, extrudability, and shape retention in terms of concrete rheology, which can be modified using admixtures. Currently most 3D printing concretes feature high cement contents, with little use of secondary cementitious materials. This leads to high embodied carbon, and addressing this is a fundamental objective of this work. The research identifies attapulgite, bentonite, and sepiolite clay as potential concrete admixtures to tailor concrete rheology. Eight low-carbon concrete mixes are designed to incorporate GGBS at a 50% replacement level and are used to measure the influence of each clay on the concrete rheology at varying dosages. A comprehensive rheological test protocol is designed and carried out on all mixes, together with other tests including slump-flow and compression strength. The objective is to determine the applicability of each clay in improving the printability of low-carbon concrete. The findings reveal that at a dosage of 0.5%, sepiolite was seen to improve static yield stress, dynamic yield stress, and rate of re-flocculation, resulting in improved printability. The addition of attapulgite and sepiolite at a dosage of 0.5% by mass of binder increased compressive strength significantly; bentonite had very little influence. These gains are not repeated at 1% clay content, indicating that there may be an optimum clay content. The results are considered encouraging and show the potential of these clays to enhance the performance of low-carbon concrete in 3D printing applications.

Risk management and its relationship with innovative construction technologies with a focus on building safety

Risk management and its relationship with innovative construction technologies with a focus on building safety

INNOVATIVE TECHNOLOGIES IN CONSTRUCTION WASTE MANAGEMENT IN ACCORDANCE WITH CIRCULAR ECONOMY

This study analyzes contemporary innovative approaches and technologies aimed at reducing construction waste and promoting its recycling, while also exploring their implementation potential within a circular economy framework. The scientific novelty lies in the examination of innovative strategies enhancing construction waste management within the circular economy context, contributing significantly to understanding and utilizing such technologies. Additionally, the practical value of this work is underscored by its provision of actionable insights and global best practices in implementing innovative technologies for construction waste management. The article delves into the significance and opportunities of utilizing innovative technologies within the context of a circular economy, addressing pertinent issues, expanding the understanding of circular economy concepts in construction, and offering practical examples and recommendations for implementation. The impact of circular economy principles on waste reduction and resource optimization in construction is thoroughly analyzed, with a focus on tools and technologies such as secondary resource utilization, 3D printing, Internet of Things, and artificial intelligence to enhance waste management processes, ensuring their sustainability and efficiency. Furthermore, the article showcases successful innovative projects and initiatives globally while examining challenges and future prospects. It advocates for the active adoption of innovative technologies in construction and waste management to foster sustainable development and environmental preservation. By highlighting the intersection of cutting-edge technology and environmental sustainability, this study provides a comprehensive overview of how the construction industry can evolve to meet contemporary environmental challenges, ultimately contributing to a more sustainable and efficient construction sector. The research emphasizes the critical role of integrating technological advancements with circular economy principles to address the mounting issue of construction waste. It explores how the adaptation of these advanced technologies can lead to substantial reductions in waste generation, improved resource efficiency, and the development of sustainable construction practices. The study also underscores the importance of policy support and stakeholder collaboration in facilitating the widespread adoption of these innovative solutions. In conclusion, this article not only presents a detailed analysis of current trends and technologies in construction waste management but also offers a forward-looking perspective on the future of the industry. It serves as a call to action for policymakers, industry professionals, and researchers to embrace and invest in innovative technologies that align with the principles of the circular economy, ensuring a resilient and environmentally responsible construction sector for future generations. Keywords: technologies, management, waste, innovations, economy, efficiency, resources, sustainability, materials, cycle

China's green building revolution: Path to sustainable urban futures

This paper critically examines the significant strides China has made toward sustainable urban development, emphasizing the evolution of green building practices since 2015. Through a detailed analysis of green building policies under China's 13th and 14th Five-Year Plans, as well as the General Code for Building Energy Conservation and Renewable Energy Utilization, this study highlights the progressive integration of sustainability in construction. Notable advancements include the implementation of stringent energy efficiency standards and the incorporation of renewable energy technologies, which have collectively shifted the paradigm of architectural practices in urban China. Moreover, the paper draws upon several case studies, such as the Shanghai Chenghuaxinyuan Project and Mini Sky City, to illustrate the tangible outcomes and the effectiveness of these policies in real-world settings. These examples not only demonstrate significant reductions in energy consumption and carbon emissions but also reflect the scalability and replicability of such initiatives in other urban contexts. Key findings suggest that China's proactive policy landscape has catalyzed a national movement towards environmentally responsible construction, setting a global benchmark for sustainable urban development. The paper argues that these policy-driven initiatives have important implications for practitioners, who are encouraged to adopt innovative construction technologies and sustainable practices. For policymakers, the study underscores the necessity of continuous support for research and development in green technology, coupled with robust regulatory frameworks to sustain momentum in the green building sector. Finally, the paper offers comprehensive recommendations aimed at enhancing the efficacy and adoption of green building practices, proposing that future policy directions should focus on integrating smart city technologies to further optimize energy use and urban sustainability.

DEVELOPMENT OF INNOVATIVE TECHNOLOGIES IN CONSTRUCTION AND CIVIL ENGINEERING IN THE CONTEXT OF DIGITALIZATION OF THE UKRAINIAN ECONOMY

Purpose. Construction and civil engineering, traditionally perceived as conservative industries, also feel the need to adapt to the demands of the time and introduce innovative technologies. Ukraine, entering the era of digital transformation, is actively developing and implementing new technologies in the construction industry. Therefore, systematization and coverage of key aspects of the impact of digital Transformation into the construction industry and civil engineering in Ukraine is the main task today. Methodology. The introduction of Internet of Things technologies in the construction industry expands the possibilities of building control and management. Findings. Sensors located in different parts of the structures allow you to monitor the condition of the building in real time, identify possible problems and ensure the safety of objects. Artificial intelligence is becoming an integral part of the digital transformation of construction. Machine learning algorithms help predict and optimize construction processes, which increases Efficiency of planning and resource management. The 3D printing system in construction is one of the promising and revolutionary innovations that is already influencing traditional approaches to construction processes. This digital technique will bring significant changes to the field of construction, accelerating and optimizing a number of stages from design to execution Originality. Analysis of current problems, especially now, in the difficult times of war, industrial construction in Ukraine, as well as around the world, is a promising direction for the development of other industries in general. Industrial construction is an important branch of the construction industry that specializes in the creation and operation of buildings and infrastructure facilities for industrial needs. Practical value. The introduction of innovative technologies in construction and civil engineering in the context of digitalization of the Ukrainian economy has a significant practical impact on various aspects of the industry: Improving Construction Productivity and Quality: Use of digital technologies such as the Internet of Things (IoT), artificial intelligence (AI), virtual reality (VR) and augmented reality (AR), allows you to increase the efficiency of construction processes, reduce the time of work and avoid errors; Cost optimization: Using machine learning algorithms to predict resource needs, such as materials and labor, allows you to rationalize costs and reduce construction costs.

INNOVATIVE TECHNOLOGY FOR THE CONSTRUCTION OF A PYLON STATION OF THE METRO BASED ON THE EXPERIENCE OF USING NATM

Purpose. For quite a long time, the metro station of the pylon type of deep contour interval was considered an underground structure that no longer has development potential. However, after the introduction of innovative technologies during the construction of the Dnipro metro, in particular the New Austrian Tunneling Method (NATM), this design is being used again and has developed further use. The purpose of the scientific article is to analyze innovations in the technology of construction of a three-vaulted pylon metro station from precast reinforced concrete using NATM, which require scientific justification. Methodology. In order to achieve the goal, the traditional technology of constructing a deep contour interval pylon station was revised. An analysis of the features of NATM, which allow it to be used during the construction of a pylon station in strong rock, has been carried out. A step-by-step analysis of the construction of the station was implemented with the involvement of mathematical modeling based on the finite element method. For this purpose, a number of finite-element models of each stage of construction of a pylon-type station have been created. After the numerical analysis, the indicated models were adjusted in accordance with the changes associated with the new construction technology. Findings. The value of the stress-strain state of the pylon station was obtained during the numerical analysis of each stage of construction. Stress analysis proves the possibility of applying innovative construction technology in the case of a pylon station. Originality. On the basis of the performed numerical analysis of the phased construction of a pylon station based on NATM, dependencies were obtained that allow revising the existing concept of the construction of this type of station in strong rocks. The obtained data justify the application of NATM and release the potential of the analyzed underground structure. Practical value. The substantiation of the innovative technology based on NATM allows expanding the scope of its application and successfully carrying out the construction of such complex underground facilities.

Стратегические угрозы низкой производительности труда в строительной отрасли

The author applied the methods of Professor L.V. Kvint’s scientific school of strategizing to the construction industry in the Russian Federation. Strategic threat is a set of adverse conditions and factors that affect the strategic results. This term belongs to the first stage of strategizing which analyzes external and internal environment and assesses new opportunities and threats. The research featured various strategizing issues in the domestic construction industry, in particular, those that increase labor performance. The factors that reduce labor productivity were divided into several groups as “an unstable contractor”, “an unstable team”, and “an unstable worker”. The article describes strategic threats to the development of the construction industry and introduces some ideas on how to strategize labor performance, e.g., by developing and implementing social and technological innovations. In this regard, the priority tasks should include the following measures. The best workers should be encouraged to develop their professional skills and paid as much as qualified engineers. Robotic complexes and technical systems are to replace heavy physical labor. Innovative construction technologies and products should cover a wide range of construction types.

Constructed wetland as a green remediation technology for the treatment of wastewater from underground coal gasification process.

The wastewater from underground coal gasification (UCG) process has extremely complex composition and high concentrations of toxic and refractory compounds including phenolics, aliphatic and aromatic hydrocarbons, ammonia, cyanides, hazardous metals and metalloids. So, the development of biological processes for treating UCG wastewater poses a serious challenge in the sustainable coal industry. The aim of the study was to develop an innovative and efficient wetland construction technology suitable for a treatment of UCG wastewater using available and low-cost media. During the bioremediation process the toxicity of the raw wastewater decreased significantly between 74%-99%. The toxicity units (TU) ranged from values corresponding to very high acute toxic for raw wastewater to non-toxic for effluents from wetland columns after 60 days of the experiment. The toxicity results correlated with the decrease of some organic and inorganic compounds such as phenols, aromatic hydrocarbons, cyanides, metals and ammonia observed during the bioremediation process. The removal percentage of organic compounds like BTEX, PAHs and phenol was around 99% just after 14 days of treatment. A similar removal rate was indicated for cyanide and metals (Zn, Cr, Cd and Pb). Concluded, in order to effectively assess remediation technologies, it is desirable to consider combination of physicochemical parameters with ecotoxicity measurements. The present findings show that wetland remediation technology can be used to clean-up the heavily contaminated waters from the UCG process. Wetland technology as a nature-based solution has the potential to turn coal gasification wastewater into usable recycled water. It is economically and environmentally alternative treatment method.

Experimental investigation of seismic behavior of precast pier‐footing socket connection with different design parameters

AbstractAccelerated bridge construction, with innovative connection details and construction technologies, has been extensively investigated and put into practical application for years. Nowadays, there are three commonly used connection methods of accelerated bridge construction technology, namely, lap‐spliced connection, sleeve connection, and socket connection. Due to the convenience of construction and lower requirements of construction accuracy, the socket connection is more suitable for reconstruction and expansion projects of traffic infrastructure, which could minimize the impact on traffic and accelerate construction progress. According to the structural characteristics of the socket connection, there are some design parameters that may significantly affect the seismic resistance of the structure, such as socket embedment length, fabrication of the shear key, and grouting material strength. To fully study the influence of different design parameters on structural performance, an experiment was carried out to investigate the seismic behavior of the precast pier‐footing socket connections with different design parameters. Five 1:2 scale reinforced concrete precast pier‐footing socket connection specimens with different design parameters were designed and tested under cyclically reversed horizontal loads. The development of hysteresis features, failure mode, load‐bearing capacity, stiffness degradation, structural ductility, energy dissipation capacity, and residual drift are analyzed to reveal the influence of the different design parameters on the seismic behavior of the precast pier‐footing socket connection. The seismic behavior of the precast pier‐footing socket connection was significantly influenced by the embedment length especially when the embedment length was less than 1.0bc. When the embedment length was 0.5bc, the failure mode changed from bending damage at the bottom of the precast pier to the anchorage failure of the precast pier‐footing socket connection. When the embedment length was 1.5bc, the fabrication of the shear key had limited improvement on the seismic performance of the specimen, while reducing the ductility of the specimen. When the embedment length was 1.0bc, the grouting material with a strength grade of C60 could be used in the socket connection between the precast pier and footing. The research presented in this paper provides some design suggestions and a technical basis for evaluating the seismic behavior of precast pier‐footing structures with socket connection.

Центр створення та розвитку стартапів Національного університету «Чернігівська політехніка»: архітектурна реновація будівлі колишнього кінотеатру «Перемога» в Чернігові

Based on modern humanistic principles of architectural and urban design and system analysis of three-dimensional solutions of the former «Peremoha» cinema in Chernihiv, the results of the study of architectural and conceptual images are presented and a project for the architectural renovation of the new building of the Center for the Creation and Development of Startups of Chernihiv Polytechnic National University is proposed. The project envisages the spatial transformation of space using a system of load-bearing wooden frame structures and innovative glass construction technologies. The designed superstructures, together with the system of terraces and balconies, will visually create a transparent space for the interior of the new building, accessible to sunlight and convenient for educational, scientific and artistic activities of students, teachers and active residents of the city.

Цифровизация как форма инновационного развития рынка недвижимости

The article highlights the main trends in the innovative development of the Russian real estate market, which have emerged under the influence of the introduction of digitalization. It is shown that at present the real estate market is undergoing significant changes, moving to a new qualitative state. This is due to the emergence and introduction of innovative construction technologies, the global change in the types of urbanization, changes in the social requirements of the population, the improvement of legislative and organizational support for the functioning of the real estate market and, above all, the widespread use of digital technologies. The analysis of digital services used in the Russian real estate market is carried out. It is determined that a significant number of operations are involved in the process of managing real estate and infrastructure, which are subject to transformation and optimization through the use of innovative digital technologies. The existing problems of digitalization of the real estate market have been clarified and the key directions of their solution have been identified. It is concluded that digitalization will lead to a change in the behavior of all participants in the real estate market real estate market developers, sellers, tenants, agents, property owners.
 As a result, the real estate market will become more open and transparent.

Load introduction for concrete‐encased steel composite columns using high‐performance materials

AbstractDue to the increasing demand for high‐rise buildings and resource‐efficient construction, the demand for innovative construction technologies and materials is growing. High‐performance materials provide resource‐optimized structural solutions providing an important load‐bearing resistance.However, questions arise about the ductility of structural members using e.g., high‐strength concrete that is particularly important for the shear connectors of composite structures. This paper evaluates the load‐bearing capacity of the headed stud shear connectors arranged in the load introduction zone of encased composite columns using concrete compression strength classes C50/60, C80/95, and C100/115. An experimental study consisting of 32 specific push‐tests for circular and square cross‐sections with an embedded structural steel profile HE 160 B has been investigated. The loading procedure defined in EN1994‐1‐1:2004 Annex B was applied. Eight specimens were initially preloaded for six to twelve months to investigate the impact of the long‐term behavior of the concrete.Numerical simulations performed in FE code Abaqus® supported the investigation, using a simplified definition of the bond. The results correlated well with the outcomes of the extremital campaign.The research project thus provides the first approaches to be able to include high‐strength materials in the composite construction regulations for columns in the future.

Critical factors influencing the internet of things technology adoption behavior of construction companies: evidence from China

PurposeLimited use of Internet of Things (IoT) technology on construction sites has restricted its value in the construction industry. To propel its widespread application, this paper explores the influencing factors and action paths of construction companies' IoT technology adoption behavior.Design/methodology/approachFirst, literature research, technology adoption theories, and semi-structured expert interviews were employed to build the adoption model. Second, a questionnaire survey was conducted among Chinese construction contractors to collect empirical data. Third, the structural equation model method and regression analysis were used to test the adoption model. Finally, the findings were further validated with interviews, case studies, and field observations.FindingsExternal environmental pressure (EEP), perceived benefit (PB), top management support (TMS), company resource readiness (CRR), adoption intention (AI), and perceived compatibility (PCA) have a direct positive impact on adoption behavior (AB). In contrast, perceived cost (PC) and perceived complexity (PCL) exert a direct negative impact on AB. The EEP, PB, and PC are critical factors affecting AB, whereas AI is strongly affected by CRR and TMS. Besides, AI plays a part mediating role in the relationship between seven factors and AB. Company size and nature positively moderate AI's positive effect on AB.Originality/valueThis paper contributes to the knowledge of IoT technology adoption behavior in the construction sector by applying the technology adoption theories. Exploring the implementation barriers and drivers of IoT technology in construction sites from the perspective of organizational technology adoption behavior and introducing moderating variables to explain adoption behavior are innovations of this paper. The findings can help professionals better understand the IoT technology adoption barriers and enhance construction companies' adoption awareness, demand, and ability. This work also provides a reference for understanding the impact mechanism of the adoption behavior of other innovative technologies in construction.

Exploring UAE's transition towards circular economy through construction and demolition waste management in the pre-construction stage–A case study approach

PurposeThis paper aims to explore UAE's transition towards circular economy (CE) through construction and demolition waste (CDW) management in the pre-construction stage. The extent of circularity is assessed by five key aspects of CE, such as policies and strategic frameworks, design for waste prevention, design for disassembly or deconstruction, use of prefabricated elements and CDW management plans.Design/methodology/approachMultiple case studies were conducted in the context of the Dubai construction industry (UAE). Three significant and unique construction projects were selected as the cases. Semi-structured interviews were carried out to collect data, and the thematic analysis technique and NVIVO 12 software were used for data analysis.FindingsFindings reveal several positive initiatives towards CE in the UAE context; yet it is identified that the transition is still at the initial stage. Selected case studies, the best-case scenarios of UAE (i.e. influential cases), demonstrated adequate measures in relation to four key CE aspects out of five. For instance, (a) policies and strategic frameworks such as lean standards, green building standards and standards developed by the local authorities, (b) design for waste prevention (e.g. adherence to the 3R principle, and construction planning with BIM), (c) use of prefabricated elements and application of innovative construction technologies (e.g. 3DPC, DfMA) and (d) CDW management planning such as 3R principle were evident. However, the selected cases hardly showcase designing for disassembly or deconstruction.Research limitations/implicationsThe existing CDW practices are mostly conventional, as most constructions in UAE are procured through conventional building materials and methods. Therefore, there is a necessity of encouraging CE principles in CDW management. Even though the transition towards CE was evident in four key CE aspects out of five, the UAE construction industry has yet to adopt more effective CE-based CDW management practices to accelerate the circularity. Hence, it is necessary to enforce standard waste management guidelines, including the 3R principle, to standardise CDW management in UAE and encourage construction practitioners to adhere to CE principles.Originality/valueThe findings of this study provide valuable insights for decision-making processes around CDW management towards a CE. This paper contributes to the literature by bridging the CE concept with CDW management in the pre-construction stage. The study provides insights for industry practitioners for planning CE in terms of policies and strategic frameworks, CDW management planning, construction planning and application of innovative construction technologies.

Digital twins in lean construction: a neutrosophic AHP – BOCR analysis approach

PurposeIncreasing complexity in construction projects evokes interest in application of innovative digital technologies in construction. Digital twins (DT), which bring these innovative technologies together, have strong interactions with lean construction (LC). To highlight the collaborative nature of DT and LC, the paper explores the interactions between LC and DT and assesses benefits, costs, opportunities and risks (BOCR) of DT in LC to analyze significant obstacles and enablers in DT adoption in LC.Design/methodology/approachBOCR approach comprehensively considers both the positive and the negative attributes of a problem. At the first step, BOCR criteria for DT are identified through literature review and expert opinions, at the second step dependencies among BOCR criteria for DT in LC are determined by neutrosophic analytic hierarchy process (AHP), through a questionnaire survey. Integrating BOCR into neutrosophic AHP enables achieving more meaningful preference scores.FindingsCost of skilled workforce is the most important factor and opportunity to reduce waste is the second most important factor in adoption of DT in LC. The results were analyzed to rank the BOCR of adoption of DT in LC.Originality/valueThis study, in a novel way, performs BOCR analysis through neutrosophic AHP to reflect experts' judgments more effectively by neutrosophic AHP's better handling of vagueness and uncertainty. The paper provides a model to better understand the significant factors that influence adoption of DT in LC.

Design and BIM-based technology on a new cross-sea bridge in Xiamen, China

The Xiamen Second East Cross-Sea Bridge in China is a continuous steel box-girder bridge completed in September 2022. Innovative design and construction technologies helped to improve design, delivery and long-term performance. Building information models were extended from design and construction process simulation to systems for safety, quality management, monitoring and maintenance. This paper describes how whole life-cycle digital modelling significantly improved project management, construction quality and overall costs.

Best Practices in Construction 4.0 – Catalysts of digital innovations (Part I)

Digital transformation in the AEC industry (Architecture, Engineering and Construction) is a key driver to enhance technical innovation in the branch and adds dynamic to all work processes and methods. A more differentiated understanding of the responsible use of innovative technologies aims not only towards increased sustainability and more efficient building life cycles but also recognizing the unintended effects such as artificial intelligence (AI). The study is part of a larger primary research on Corporate Digital Responsibility (CDR) in Construction 4.0; this identifies, analyzes and systematically evaluates key factors of a sustainable digital transformation, especially in the traditionally small-scale Construction Industry - one in which there can be no standardized procedure. The study uses interdisciplinary literature and data research and expert interviews. The qualitative method enables a critical-reflexive analysis of the key factors of a meaningful and sustainable implementation of innovative technologies in Construction. Application examples show possible approaches - some of which are implemented as prototypes - and provide guidance for small to medium-sized companies. The study outlines the necessary steps for companies to define their own potential fields of application and find suitable methods. Another aim of the study is to take stock of the acceptance of new technologies by comparing different perspectives from experts. The study results show new perspectives in the transformation of the Construction Industry. They show that Digital Transformation in Construction 4.0 has great potential for an economical, efficient construction life cycle, but requires the responsible, sensible use of innovative technologies.

Experimental Analysis of Hot-Mix Asphalt (HMA) Mixtures with Reclaimed Asphalt Pavement (RAP) in Railway Sub-Ballast.

Environmental safeguards promote innovative construction technologies for sustainable pavements. On these premises, this study investigated four hot mix asphalt (HMA) mixtures-i.e., A, B, C, and D-for the railway sub-ballast layer with 0%, 10%, 20%, and 30% reclaimed asphalt pavement (RAP) by total aggregate mass and a rejuvenator additive, varying the bitumen content between 3.5% and 5.0%. Both Marshall and gyratory compactor design methods have been performed, matching the stability, indirect tensile strength, and volumetric properties of each mixture. Dynamic stiffness and fatigue resistance tests provided mechanical performances. Laboratory results highlighted that the RAP and the rejuvenator additive increase the mechanical properties of the mixtures. In addition, the comparative analysis of production costs revealed up to 20% savings as the RAP content increased, and the life cycle impact analysis (LCIA) proved a reduction of the environmental impacts (up to 2% for resource use-fossils, up to 7% for climate change, and up to 13% for water use). The experimental results confirm that HMA containing RAP has mechanical performances higher than the reference mixture with only virgin raw materials. These findings could contribute to waste management and reduce the environmental and economic costs, since the use of RAP in the sub-ballast is not, so far, provided in the Italian specifications for railway construction.

Досвід використання сучасної опалубки при зведенні монолітних будинків в місті Кропивницькому

This work highlights the extent to which the construction industry is equipped with the latest technologies, and analyzes the foreign practice of introducing innovations. An example of the application of innovative technologies in monolithic construction, in particular the use of work automation and the introduction of nanotechnology, is presented. The pace of development of the urban environment in general and construction in particular requires the introduction of innovative technologies in residential construction. The analysis of modern trends in the introduction of new construction technologies and materials in economically developed countries of the world allows us to assert that the basis of dynamic introduction into practice for the next 10-20 years will be materials and technologies obtained on the basis of achievements and developments in the field of monolithic construction. The rapid development of the latest technologies, on the one hand, involves the use of the achieved results of fundamental research in applied areas of the construction industry, and on the other hand, the development of monolithic construction itself is impossible without new approaches to the design and construction of objects. The use of monolithic construction is one of the most popular and promising directions in the construction industry all over the world. Its technology makes it possible to erect buildings of any architectural complexity and number of floors in a short period of time. This is the process of building buildings from reinforced concrete, which is an iron structure (frame) filled with concrete. Due to the hardness of the metal and the strength of the cement coating, these structures are able to withstand enormous loads, thereby ensuring the durability of the buildings. Having many advantages over other types of construction, this technology is used both in civil and industrial construction. It is used in the construction of private houses, residential complexes, office centers, warehouses, garages, reservoirs and swimming pools, etc. The quality of the construction of a monolithic building depends on the correct execution of construction works using special equipment and materials at all technological stages of its construction.