Application Of High Performance Concrete Research Articles

Formulation Design and Optimization of High-Performance Concrete for Enhanced Properties

High-performance concrete, as a crucial construction material, finds extensive applications in critical engineering projects. This paper focuses on the formulation design and optimization of high-performance concrete. By analyzing the impact of different admixtures, additives, and mix proportions on concrete properties, the methods for enhancing concrete strength, durability, and crack resistance are explored. The study integrates experimental and simulation approaches to provide theoretical and practical support for the reliable application of high-performance concrete.

Application of High-performance Concrete in Civil Engineering

With the continuous improvement of modern civil engineering performance requirements on building materials, high-performance concrete (High-Performance Concrete, HPC) has become one of the key materials. This paper discusses the application of HPC in various civil engineering, and its innovative impact. HPC has played a key role in many major engineering projects for its extraordinary durability, high intensity and excellent working nature. First, the paper introduces the basic composition and performance characteristics of HPC, including its compressive strength, durability and rheological properties. The optimized formulation of HPC reduces the use of cement, and cement production is one of the major sources of carbon emissions. By using fly ash, silicon ash and other industrial by-products to replace part of the cement components, HPC not only improves its environmental friendliness, but also enhances the comprehensive performance of the material. Finally, the paper prospects the potential development of HPC in future civil engineering. With technological advances and increasing demand for environmentally friendly building materials, the improvement and application of HPC will continue to expand.

Research on the application of high performance concrete and steel structure combination in civil engineering

Abstract The increase in complexity and quality standards of civil engineering projects continues to drive the innovation of construction materials from the traditional ordinary concrete-steel structure combination to the combination of high-performance concrete and steel structure. In this paper, the application of the combination of high-performance concrete and steel structures in civil engineering projects is investigated based on the mechanical properties of the two structures. The structural reliability index and the corresponding functional function are used to measure the structural reliability of the combination of high-performance concrete and steel structures. After measuring its reliability, a finite element simulation is carried out to investigate the application value of the high-performance concrete-steel structure combination in civil engineering projects. Considering the reliability index of resistance and load time-varying effects decreases with the service time of the combined structure, if the reliability index of the components during the service period is not allowed to be lower than the target reliability index, the time to reach the limit state of the selected high-performance concrete-steel combined building in this paper is about 75 years. The ultimate load-carrying capacity of the high-performance concrete-steel structure combination is increased by 28.74% compared with that of the ordinary concrete-steel structure combination, and the end slip of the high-performance concrete-steel structure combination is smaller than that of the ordinary concrete-steel structure combination under the same load. It shows that the advantages of high-performance concrete-steel structures in civil engineering are much more than ordinary concrete-steel structures.

The Application of High-Performance Concrete in Building Structures and Analysis of Its Effects

The Application of High-Performance Concrete in Building Structures and Analysis of Its Effects

Optimized Proportioning Model and Efficacy Analysis of High Performance Concrete in Bridge Construction

Abstract As an important part of the raw materials for building construction, high performance concrete is well known for its many properties. This paper analyzes the prerequisites for high-performance concrete proportioning from the technical point of view and processes involved in designing high-performance concrete proportioning. A particle swarm algorithm combined with a neural network is used to establish the relationship model between concrete strength and proportion, and the constructed PSO-BP model is used for the prediction of concrete mixing ratio strength to get the best material proportion. The prediction ability of the BP neural network model, GP model, and PSO-BP model is compared. In order to test the applicability and reliability of the high-performance concrete formulated by the PSO-BP model in members, static load tests were carried out in this paper on a 20m test single girder to test the strain and deflection of concrete in the control section. The results show that the relative error of the high-performance concrete strength predictions predicted by the PSO-BP model is within 2%. It shows that the optimum high-performance concrete can be formulated using the PSO-BP model. The test beams can meet design and practical engineering requirements in terms of strength and stiffness and can be applied to real bridges. Based on the research and analysis, suggestions have been made for the application of high-performance concrete in bridge construction from four aspects.

Formulation Design and Optimization of High-Performance Concrete for Enhanced Properties

High-performance concrete, as a crucial construction material, finds extensive applications in critical engineering projects. This paper focuses on the formulation design and optimization of high-performance concrete. By analyzing the impact of different admixtures, additives, and mix proportions on concrete properties, the methods for enhancing concrete strength, durability, and crack resistance are explored. The study integrates experimental and simulation approaches to provide theoretical and practical support for the reliable application of high-performance concrete.

The application of high performance in our lives

This paper provides an overview of high-performance concrete (HPC), including its definition, behavior, development,design criteria, innovative structural application examples, prospects, challenges, and limitations. HPC is a special typeof concrete with higher strength, durability, and other properties than conventional concrete. Several factors, such asshrinkage properties, thermal properties, flexibility, and durability, influence HPC behavior. Design criteria for HPCinclude High strength design, water-cement ratio, temperature resistance, and other design properties. Over the years,HPC has evolved to meet the growing demand for high-performance structures, such as using recycled aggregates inHPC, developing self-compacting concrete (SCC), and developing ultra-high performance concrete (UHPC). Innovativestructural applications of HPC include the application of HPC in precast components, high-rise building structures, etc.The future of HPC is promising as it is continuously developed and optimized for various applications. However, thereare still some challenges and limitations to overcome, such as high production costs, maintenance work requirements,difficulty mixing, and so on. This paper provides valuable insights for engineers, architects, and researchers interested indesigning and constructing HPC structures.

Sustainable Development of Structure Using Alccofine

Abstract: Due to its extraordinary adaptability as a construction material, concrete is the single most utilised produced substance on earth, with an annual production surpassing 2 billion metric tonnes (Crow 2008). The damaging impact on the environment caused by the manufacture of concrete's components is one disadvantage as a construction material. These negative effects can be reduced by using alternative/green ingredients in concrete in place of Portland cement and natural aggregates. Any construction project's overall cost directly relates to the amount of concrete utilised in the project. The largest energy- and environmentally-demanding ingredient in traditional concrete is Portland cement. In the process of making it, fuel is burned to heat the raw materials to about 1,500°C, which decarbonizes the limestone. Due to fuel combustion and decarbonization, 0.81 kg of CO2 is emitted for every kilogramme of cement during this process (Hendriks et al. 2000).The most substantial single material component in the constructed environment is often concrete. Significant environmental and financial benefits might be realised if the embodied energy of concrete can be decreased without compromising performance or raising costs. The main ingredients of concrete are Portland cement, aggregate, and water. Although Portland cement generally only makes about 12% of the mass of concrete, it is responsible for 93% of the total energy contained in concrete and 6–7% of global CO2 emissions (Mehta 1998). There are a lot of papers available, replacing cement with In this study, the strength of concrete is examined, and the costs of OPC concrete and concrete with ALCCOFINE are compared. Silica fume is typically recommended as the ideal cement extender in high performance concrete applications where high strength and low permeability are the primary criteria. Despite the fact that silica fume is known to promote durability, the increased water content in concrete frequently negates its addition.

Application of High-Performance Concrete in Bridge Structures Under Extreme Environment

Application of High-Performance Concrete in Bridge Structures Under Extreme Environment

Application of high performance concrete for reconstruction

One of the sustainability aspects of the construction is a sufficient durability. In objectively justified cases, the durability is enhanced by reconstruction. To ensure economic design of the reconstruction, non-liner approaches are often applied. This paper deals with aănonlinear numerical simulation of disassembled reinforced concrete (RC) panels strengthened by an ultra-high performance concrete (UHPC) layer. Based on the prior experimental programme, simulations of four-point bending tests of the original and strengthened panels are created using software ATENA Science. Calibration of the material parameters is based on the destructive and non-destructive investigations performed in the experimental programme. The comparison of the experimental and numerical model loading curves indicates that additional mechanical testing will be needed in order to achieve an accurate numerical simulation. Although the bending test of the RC panel and the crack mouth opening displacement (CMOD) test performed on the applied UHPC beam were calibrated, the final model of the UHPC strengthened panel does not correspond completely with the experimental measurements. In this paper the possible reasons for this result are discussed.

Early age cracking potential of inner lining of coal mine frozen shaft

Recently, the application of high performance concrete (HPC) is popular in inner lining of frozen shaft in water-rich stratum. The circular crack of inner lining concrete easily appears in the early age (0∼240 h) leading to water burst accidents in the service period. The early-age cracking potential of HPC in inner lining is investigated by Temperature Stress Test Machine (TSTM) in the laboratory. The complex boundary, temperature history and variable restraint degree, was performed simultaneously by TSTM in this study. The experimental analysis indicated that (1) The range of restraint degree is almost 40% to 89.3% under steel frame restrained condition which can almost realize actual constraint degree of inner lining; (2) The cracking potential increased slightly for Mixture C60, C70, and increased severely once the Mixture strength exceeded C70; (3) The integrated crack indicators of C60, C70 and C90 repeat such as cracking stress, crack age, cracking temperature and cracking thermal drop were fluctuant slightly with the concrete strength increased; (4) The increasing of concrete strength decreased the cracking potential of inner lining concrete under steel frame restrained condition, though the tensile strength is improved.

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials.

This review article proposes the identification and basic concepts of materials that might be used for the production of high-performance concrete (HPC) and ultra-high-performance concrete (UHPC). Although other reviews have addressed this topic, the present work differs by presenting relevant aspects on possible materials applied in the production of HPC and UHPC. The main innovation of this review article is to identify the perspectives for new materials that can be considered in the production of novel special concretes. After consulting different bibliographic databases, some information related to ordinary Portland cement (OPC), mineral additions, aggregates, and chemical additives used for the production of HPC and UHPC were highlighted. Relevant information on the application of synthetic and natural fibers is also highlighted in association with a cement matrix of HPC and UHPC, forming composites with properties superior to conventional concrete used in civil construction. The article also presents some relevant characteristics for the application of HPC and UHPC produced with alkali-activated cement, an alternative binder to OPC produced through the reaction between two essential components: precursors and activators. Some information about the main types of precursors, subdivided into materials rich in aluminosilicates and rich in calcium, were also highlighted. Finally, suggestions for future work related to the application of HPC and UHPC are highlighted, guiding future research on this topic.

Database trends and critical review of seismic performance tests on high strength steel reinforced concrete components

The use of High Strength Steel (HSS) reinforcement in concrete construction is emerging rapidly, especially in high performance concrete applications. The ACI 318–19 code has permitted the use of HSS reinforcement Grades 80 (550 MPa) and 100 (690 MPa) in earthquake-resistant concrete components. This change was motivated by recent experimental and analytical research to assess the benefits and drawbacks of using HSS reinforcement in seismic design of concrete. The use of HSS reduces bar congestion and provides more effective confinement to concrete, however, great attention must be paid to its drawbacks. Examples of such drawbacks are lower hysteretic energy, higher bond stresses, lower plasticity spread due to local strain concentrations, and potential for premature confined concrete crushing before full utilization of HSS full capacity. This study reviews past experimental research on cyclic performance of various concrete structural components reinforced with HSS, including columns, beams, beam-column joints, walls, and coupling beams. In addition, a comprehensive database of cyclic tests on HSS reinforced components is established, presented and evaluated. An HSS reinforced flexural section parametric study is performed to aid in interpreting database trends and literature results. The effect of HSS design parameters and cyclic response measures of these components such as load-deformation relationships, strength, curvature and strains, ductility and energy dissipation capacity are discussed and compared to their conventional steel reinforced concrete counterparts based on literature and the database trends observed. The database and the cyclic behavior observations presented may serve as basis for future experimental and analytical studies concerned with characterizing seismic response, modeling and design of HSS reinforced concrete components.

A Critical Review on Effect of Nanomaterials on Workability and Mechanical Properties of High-Performance Concrete

The application of nanomaterials in high-performance concrete (HPC) has been extensively studied worldwide due to their large surface areas, small particle sizes, filling effects, and macroquantum tunneling effects. The addition of nanomaterials in HPC has great contribution to enhancing the pore size of the cementitious matrix, improving the hydration of cement, and making the matrix much denser. In order to present an exhaustive insight into the feasibility of HPC reinforced with nanomaterials, the new development of HPC was summarized and the influence of different nanomaterials on the properties of HPC was reviewed based on more than 100 recent studies in this literature review. Workability, compressive strength, tensile strength, and flexural strength properties of HPC with nanomaterials were discussed in detail. In addition, nanomaterial-modified HPC was compared with the traditional concrete and obtained a lot of valuable results. The results in the present review indicate that the addition of various nanomaterials improves the mechanical properties of HPC, while reducing the workability of HPC. However, there is an optimal dosage of nanomaterial for improving the mechanical properties of HPC. Improving the properties of HPC by adding nanomaterials is expected to become a mainstream technique in the future. This literature review can provide comprehensive and systematic knowledge to researchers and engineers working on HPC and promote the application of this new HPC in modern civil engineering.

Performance evaluation of polypropylene fiber waste reinforced concrete in presence of silica fume

Abstract The worldwide application of high-performance concrete is particularly suitable for high-level towers, long bridges and special structures. Concrete binder products (used in high-level concrete), due to their low expense, reliability and ample compression strength in the structural framework, are desirable for use as construction materials. Failure is attributed to its features of poor tensile strength and effect and its sensitivity to increases in moisture. The fiber reinforcement can be a simple, functional and cost-effective way to resolve such limitations. The application of fibers as concrete reinforcement will improve many of its properties, in particular strength, fatigue, permeability, and barrier properties. Various consequences of the addition of silica fume (SF) and polypropylene fiber waste (PFW) to the mechanical characteristics of the concrete have been analyzed in this study. The current study aimed at analyzing the effects of cement substitution with SF, PFW and their combinations. SF content was ranged between 4%, 8%, 12%, and 16% and PFW as 0.4%, 0.8%, 1.2% and 1.6% by weight substitution of cement in order to analyze the effect on workability, compressive strength & tensile strength investigated at 7 days, 28 days, & 90 days of curing ages. The efficiency of the concrete w.r.t mechanical properties was improved severalfold in ternary composites. The XRD and SEM assessment correlated the microstructure with the improved mechanical properties of the composites.

Research on mix proportion and solid rebound detection of high strength concrete in super high rise building

At present, the application of high performance concrete in super high-rise building engineering structure is more and more extensive. The mix proportion of high-strength concrete is the basic variable of concrete, and the rebound detection of building structure is carried out. On this basis, the design method of building pressure matching is proposed. Due to the large error of the estimated value of the strength test curve unified by the whole country, in a new project in Xi’an, the rebound method and core drilling method are carried out on several concrete members, and it is concluded that the test results of rebound method and core drilling method with different strength levels are quite different. In view of the difference of test results of mix proportion rebound method of high-strength concrete of super high-rise buildings in Xi’an area, the correction method of rebound difference of different strength levels is put forward.

An experimental investigation on properties of concrete by using silica fume and glass fibre as admixture

Abstract High Performance Concrete (HPC) has been used in various structures all over the world since last two decades. Recently a few infrastructure projects have also seen specific application of high-performance concrete. The development of High Performance Concrete (HPC) has brought about the essential need for additives both chemical and mineral to improve the performance of concrete. Most of the developments across the work have been supported by continuous improvement of these admixtures. To attain the set out objectives of the present investigation, cement has been replaced partially with silica fume 20%. Glass fibres 1% to produce High Performance Concrete. Hence, an attempt has been made in the present investigation to study the behaviour of Natural sand and M-sand. Natural Sand has been replaced with M-sand in three different percentages viz. 0, 50, 100%. HPC is tested for compression strength.

Improving the dispersion of silica fume in cement pastes and mortars

There are many possibilities how to improve concrete properties such as compressive strength, flexural strength, durability, and others. The change in the composition of ordinary Portland concrete (OPC) is one possible way. This change may result in the formation of concrete with added properties known as high-performance concrete (HPC). Traditional methods used to receive high-performance concrete design and manufacture emphasize the removal of coarse aggregates. This is achieved by using the specially sorted fine aggregates at relatively low doses along with super-plasticizers and silica fume. Problem with fine reactive aggregates is their agglomeration which causes reduction of the reactive surface. This work is focused on evaluation of the ultrasound technology for the dispersion of silica fume. For comparison, different cement mixtures were prepared to study the effects of the treatment of silica fume prior to its use in HPC applications.

Effects of coarse aggregate and steel fibre contents on mechanical properties of high performance concrete

This study investigated the effects of the coarse aggregate and steel fibre contents on the mechanical properties of high performance concrete (HPC) at an ambient curing temperature. HPC bulk materials were formed using four replacement levels by volume of mortar (0%, 16%, 28% and 38%) and four steel fibre volume dosages (0%, 1%, 2% and 3%). The mechanical properties (e.g., compressive strength, splitting tensile strength and flexural behaviour) and the synergistic effect between coarse aggregate and steel fibre were studied. The results indicated that compressive and splitting tensile strength increased as the coarse aggregate replacement level increased from 0% to 28%, but decreased with a further increase in coarse aggregate content up to 38%. The inclusion of coarse aggregate also weakened the flexural behaviour of HPC, especially in terms of the peak flexural load, peak deflection, toughness and post-peak ductility. Furthermore, the steel fibre volume dosage had a limited effect on compressive strength but significantly enhanced the splitting tensile strength and flexural behaviour. Finally, this study discusses the mechanism of synergy between coarse aggregate and steel fibre based on scanning electron microscopic observations of the HPC microstructure. These research outcomes pave a way toward prospective engineering applications of HPC.

Numerical investigation on ultra-high performance concrete beam under pure bending

Ultra high performance concrete applications are increasing, widely on all state of construction due to its reliability over its strength and convenience. With this concern, many studies started to experimentally explore the properties of ultra-high performance concrete at various concerns. All these studies are focused on increasing the performance of this contemporary concrete through optimization of resources and additive materials. In the row, this study considers the performance of the concrete through the spacing of shear connectors (100mm and 150mm). However, in addition, the optimum percentage of inclusion and length of steel fibres directing with different proportions of (1%, 2%, of 6mm, 1%, 2% of 13mm, 1% of 6mm and 1% of 13mm, 1% of 6mm and 2% of 13mm). This investigation involves two phases namely experimental and numerical, in which the experimental results are directed as inputs to numerical analysis. From the findings, it can be concluded the optimum spacing of shear connector with length and percentage of inclusion of steel fibres reinforcement. Results conclude that 2% of 13mm steel fibre with 150mm spacing of shear connector provides better results compared to other concerned combinations under pure bending with the considerations of flexural and bending behavior. With these results, this study provides both scientific and technical contributions also further this study enlighten the future enhancements in the concerned field of applications.