Alternative Cementitious Materials Research Articles

Thermal activation of kaolinite through potassium acetate intercalation: A structural and reactivity study

Calcined clays have emerged as a suitable alternative to partially replace conventional cement due to their high pozzolanic activity. This study explores a novel activation methodology for kaolinite, aiming to obtain metakaolin at lower temperatures than conventional thermal activation. This methodology involves a prior intercalation stage with potassium acetate (KAc) before thermal activation. The effectiveness of KAc intercalation was assessed through X-ray diffraction (XRD), indicating an intercalation ratio of approximately 90%. Several calcined temperatures were tested in accordance with the thermal behaviour analyzed through thermogravimetric analysis (TGA). Once calcined, the intercalated kaolinites exhibited enhanced reactivity compared to conventional calcined clays in the range between 400 °C to 550 °C, as demonstrated by modified Chapelle and Si/Al availability tests. A comprehensive structural characterization was conducted to facilitate a better understanding of the novel KAc-based metakaolin reactivity through various techniques (XRD, 27Al - 1H MAS NMR, and TGA). This focused on the crystalline changes in the kaolinite structure, the evolution of Al atoms conformation, and the OH behaviour at different thermal activation temperatures. Overall, this study highlights the potential of KAc intercalation as a strategy to obtain higher metakaolin content at lower temperatures than through conventional thermal treatments, offering insights into the development of its potential use as supplementary cementitious materials or alternative cementitious materials precursor.

Examining Low-Energy Gamma-Ray Protection of a New Promising Saudi Cement Product as Alternative Cementitious Material Using Geant4 Software

In modern life, cement products have become an essential material for the foundations in many structural building designs. Because of this, the natural effects of this material need to be tested and cannot be ignored. Modeling interactions of gamma rays with several cementitious compounds is the focus of this study. Gamma radiations exist naturally and artificially, but with limited gamma-ray energies, which are not easy to access for experimental gamma attenuation studies. So in the current work, a wide range of low gamma-ray energies (0.01 to 0.356 MeV) are applied to investigate the gamma radiation attenuation properties theoretically for different cement materials. Also, the Monte Carlo statistical method is applied using the Geant4 toolkit to simulate the results. The outcomes are compared with theoretical values using XCOM to validate at these energies. The effective atomic number ( Z eff ), electron density ( N eff ), and half-value layers (HVLs) for the studied samples are computed based on the simulated mass attenuation coefficient ( μ m ), as expected. The outcomes show good agreement between the simulated results with those calculated theoretically by XCOM within an 11% deviation. The silica fume sample showed a slightly higher μ m value compared with the other samples. The dependence of the photon energy and cement composition on the values of the μ m and HVLs are investigated and discussed. In addition, the values of Z eff and N eff for all cement samples behaved similarly in the given photon energy range, and they decreased as the photon energy increased.

A comprehensive review of the physical and mechanical characteristics of agricultural by-products as cementitious alternatives in the production of sustainable concrete

In recent times the construction industry has been more focused on the development of sustainable/green structures to address the Sustainable Developmental Goals (SDGs) from environmental pollution aspects caused by the production of cement as well as the conventional methods of construction. Investigations have been carried out by incorporation of alternative cementitious materials than cement, possessing pozzolanic characteristics leading to enhanced binding capability within the cement-aggregate matrix and improved compressive strength as per the desired national or international standards. These alternative cementitious materials are not only limited to manufacturing or power industry by-products viz. fly ash, quarry dust, blast furnace slag, etc. but also the by-products of the agricultural industry have been the focus of research as these possess a rich amount of Silica (SiO2) content leading to pozzolanic reactivity during the curing period and contributing to the strength of concrete. The majority of these by-products that are investigated are rice husk ash (RHA), coconut shells, palm oil fuel ash (POFA), and sugarcane bagasse ash (SCBA), as a replacement for either cement or aggregate as well as used as admixtures to a certain extent. The present work illustrates an agglomeration of previous research conducted by different authors, thereby elucidating the findings of various agro-waste usage in the production of concrete and investigating their mechanical behavior. Furthermore, specific attention is exemplified towards the behavioral response of paddy straw when used in the cement-aggregate mixture in terms of microstructural and mechanical properties aspects. In this review article, illustrations are made with additional attention to reveal the role of chemical and physical attributes of the agricultural by-products, impacting the characteristics of concrete.

A hybrid artificial intelligence approach for modeling the carbonation depth of sustainable concrete containing fly ash

One of the major challenges in the civil engineering sector is the durability of reinforced concrete structures against carbonation during the physico-chemical process of interaction of hydrated cementitious composites with carbon dioxide. This aggressive process causes carbon penetration into the reinforcement part, which affects the behavior of the structure during its lifetime due to corrosion risk. A countermeasure is using alternative cementitious materials to improve concrete texture and resist increased carbonation depth (CD). Considering that the CD test requires a long time and a skilled technician, this study strives to provide an alternative approach by moving from traditional laboratory-based methods towards artificial intelligence (AI) techniques for modeling the CD of sustainable concrete containing fly ash (CCFA). Despite the development of single AI models so far, it is undeniable that utilizing metaheuristic optimization techniques in the form of hybrid models can improve their performance. To this end, a new hybrid model from the integration of biogeography-based optimization (BBO) technique with artificial neural network (ANN) is developed for the first time to estimate the CD of CCFA. The error distribution results revealed that 59% of the ANN predictions had errors within the range of (− 1 mm, 1 mm], while the corresponding percentage for the ANN-BBO predictions was 70%, indicating an 11% reduction in the prediction errors by the proposed hybrid model. Furthermore, A10-index highlighted a performance improvement of 78% for the hybrid model, which met the closeness of the predicted values to the observed ones, so that the value of this index for models of ANN and ANN-BBO was 0.5019 and 0.8947, respectively. Analyzing the cross-validation confirmed the reliability and generalizability of the developed model. Also, the three most influential variables in estimating the CD were exposure time (27%), carbon dioxide concentration (22%), and water/binder (18%), respectively. Finally, the superiority of the ANN-BBO model was verified by comparing it with previous studies’ models.

Evolutionary Algorithms for Strength Prediction of Geopolymer Concrete

Geopolymer concrete (GPC) serves as a sustainable substitute for conventional concrete by employing alternative cementitious materials such as fly ash (FA) instead of ordinary Portland cement (OPC), contributing to environmental and durability benefits. To increase the rate of utilization of FA in the construction industry, distinctive characteristics of two machine learning (ML) methods, namely, gene expression programming (GEP) and multi-expression programming (MEP), were utilized in this study to propose precise prediction models for the compressive strength and split tensile strength of GPC comprising FA as a binder. A comprehensive database was collated, which comprised 301 compressive strength and 96 split tensile strength results. Seven distinct input variables were employed for the modeling purpose, i.e., FA, sodium hydroxide, sodium silicate, water, superplasticizer, and fine and coarse aggregates contents. The performance of the developed models was assessed via numerous statistical metrics and absolute error plots. In addition, a parametric analysis of the finalized models was performed to validate the prediction ability and accuracy of the finalized models. The GEP-based prediction models exhibited better performance, accuracy, and generalization capability compared with the MEP-based models in this study. The GEP-based models demonstrated higher correlation coefficients (R) for predicting the compressive and split tensile strengths, with the values of 0.89 and 0.87, respectively, compared with the MEP-based models, which yielded the R values of 0.76 and 0.73, respectively. The mean absolute errors for the GEP- and MEP-based models for predicting the compressive strength were 5.09 MPa and 6.78 MPa, respectively, while those for the split tensile strengths were 0.42 MPa and 0.51 MPa, respectively. The finalized models offered simple mathematical formulations using the GEP and Python code-based formulations from MEP for predicting the compressive and tensile strengths of GPC. The developed models indicated practical application potential in optimizing geopolymer mix designs. This research work contributes to the ongoing efforts in advancing ML applications in the construction industry, highlighting the importance of sustainable materials for the future.

Research on mix design and mechanical performances of MK-GGBFS based geopolymer pastes using central composite design method

In order to alleviate environmental problems and reduce CO2 emissions, geopolymers had drew attention as a kind of alkali-activated materials. Geopolymers are easier access to raw materials, green and environment friendly than traditional cement industry. Its special reaction mechanism and gel structure show excellent characteristics such as quick hardening, high strength, acid and alkali resistance. In this paper, geopolymer pastes were made with metakaolin (MK) and ground granulated blast furnace slag (GGBFS) as precursors. The effects of liquid–solid ratio (L/S) and modulus of sodium silicate (Ms) on the performances of MK-GGBFS based geopolymer paste (MSGP) were characterized by workability, strength and microstructural tests. The regression equations were obtained by central composite design method to optimize the mix design of MSGP. The goodness of fit of all the equations were more than 98%. Based on the results of experiments, the optimum mix design was found to have L/S of 0.75 and Ms of 1.55. The workability of MSGP was significantly improved while maintaining the strength under the optimum mix design. The initial setting time of MSGP decreased by 71.8%, while both of the fluidity and 28-d compressive strength increased by 15.3%, compared with ordinary Portland cement pastes. Therefore, geopolymers are promising alternative cementitious material, which can consume a large amount of MK and GGBFS and promote green and clean production.

Structural characterisation and reactivity measurement of chemically activated kaolinite

This study examines the structural evaluation of differently activated kaolins for potential use as supplementary cementitious materials (SCM) or as precursor for alternative cementitious materials (ACM). Chemical activation involved amorphizing the kaolinite structure using varying phosphoric acid concentrations, reaction times, and temperatures. Metakaolin obtained via thermal activation served as a comparison. Inductively Coupled Plasma – Optical Emission Spectroscopy (ICP-OES) characterization of the activating solutions revealed phosphoric acid activation leading to dealumination in kaolinite structures, with temperature emerging as the most significant parameter. X-ray diffraction (XRD) confirmed amorphization, attributed to the dealumination process causing Al loss and creating new Si–O–Si interlayered bonds, as monitored by 29Si magic-angle spinning nuclear magnetic resonance (MAS NMR) tracking the change from Q3 to Q4 environments. Furthermore, pozzolanic activity was assessed through Ca(OH)2 consumption and reaction heat release via modified Chapelle and R3 tests, respectively. Kaolinite subjected to intensive chemical activation exhibited high reactivity and increased specific surface area, indicating its potential as a pozzolanic material. Keywords: Kaolin; Chemical activation; Supplementary cementitious materials; Alternative cementitious materials; Dealumination; Pozzolanic reactivity.

Analysis of environmental performance indicators for concrete block manufacturing: embodied energy, CO2 emissions, and water consumption.

Concrete block production significantly contributes to environmental degradation. A thorough understanding of its ecological implications is critical for sustainable development. This study investigates concrete block manufacturing's environmental impact by quantifying embodied energy, CO2 emissions, and water consumption via a comprehensive life cycle assessment. An extended life cycle assessment methodology is utilized to quantify the environmental indicators throughout the concrete block production lifecycle. Primary industry data and secondary research data ensure accuracy and reliability. Findings showed that concrete block manufacturing requires 2.5-4.1 times more embodied energy than equal clinker mass. Cement and aggregate production and transportation account for substantial energy needs. Limestone calcination during cement production causes significant CO2 emissions, 2.3-3.3 times higher than the minimum. Water consumption is concerning during curing and washing. Exploring alternative cementitious materials, optimized processes, and water recycling can reduce embodied energy by up to 75%, CO2 emissions by up to 67%, and water consumption by up to 80%. Concrete block manufacturing necessitates considerable energy and generates significant emissions. Implementing sustainable measures can minimize embodied energy, CO2 emissions, and water consumption, enabling environmentally responsible manufacturing. This research emphasizes adopting sustainability practices to mitigate environmental impact. Policymakers, industry professionals, and researchers can employ these insights to develop effective strategies promoting green manufacturing. The concrete block industry can contribute to a sustainable future through sustainable practices.

Exploring the resilience of supplementary cementitious materials-based concrete to elevated temperatures via modern computing techniques

Researchers are focused on the production of sustainable materials in order to reduce the negative environmental impact of conventional concrete. Utilizing industrial by-products as alternative cementitious materials in concrete is an appropriate strategy for promoting sustainability in construction. This research employed supervised machine learning techniques, including gradient boosting (GB), random forest (RF), and extreme gradient boosting (X-GB), in order to predict the compressive strength of sustainable concrete when exposed to high temperatures. SHapley Additive exPlanation (SHAP) analysis provided input component relevance. The comparison of these methodologies indicated that X-GB performed remarkably well and had a superior R2 value of 0.94 when compared to GB and RF. The results were further supported by a Taylor diagram, which demonstrated that the X-GB model best fitted the data, surpassing both the GB and RF models. This study's findings demonstrated the potential of machine learning, and more particularly X-GB, for making accurate predictions of compressive strength in high-temperature concrete applications. The results of SHAP analysis may be useful for selecting the proportions of raw materials in the mix design to achieve the desired properties.

Remediation of Lead and Cadmium Contaminated Soil Using Lime with Nanosolicamaterials

Soil contamination by heavy metals significantly damages the environment, human health, plants, and animals, which has become a burning issue recently. The presence of contaminated soils due to industrials and mining activities is a major concern in today’s heavily industrialized world. With the rapid development of society, more and more soils are polluted by heavy metals, which leads to a change in soil engineering properties. Several types of technology have long been in use to remedy the heavy metal-contaminated soil. Among them, solidification and stabilization have been widely adopted. In engineering practice, engineers usually use additives to solidify and stabilize (s/s) heavy metal-contaminated soils. Solidification and Stabilization is an economic and effective technology in the remediation of contaminated soil by heavy metals, as well as sludge and sediment. The main purpose of the study was to investigate the effect of (nanomaterial materials) on the remediation of contaminated soil by the (S/S) technique. The soil was polluted with (2000 mg/kg and 1000 mg/kg) of Lead and Cadmium respectively by using Lead and Cadmium nitrates. The Pb and Cd- impacted soil was remediation using rich silicon materials of (nano-silica ) as an alternative cementitious material, and replaced with contaminated soil at (3, 5, and 7%) respectively with (5% and 10%) Lime. Nanosilica was prepared from plant extracts. The binder performance was analyzed by using unconfined compressive strength ( UCS) on the solidified soil at three curing times which were 7, 14, and 28 days. TCLP was also applied to investigate the treatment degree of solidified soil for the specimens within 28 days. The result of (UCS) indicated development in strength with curing day for all binders and proved that all mix ratios exceed the minimum Criteria of landfill disposal which is 340 kPa (0.34 N/mm2). It also showed increases in strength with using nano-silica with a lime binder. The result of the leaching test for the stabilized soil after 28 days of curing, showed a reduction in lead and cadmium leaching rate for all binders, below the EPA lead leachability limit of 5 mg/l and cadmium 1 mg/l. The results showed that the sample SH2N5L10 after 28 days is the best percentage for decreasing the leaching rate of lead and cadmium, as it reached (1.4 mg /l and 0.012 mg/l) respectively with the highest compressive strength of 4852 Kpa.

Strength Development of Metakaolin-Based Alkali-Activated Cement

Alkali-activated materials, sometimes called geopolymers, can be used as alternative cementitious materials to conventional Portland cement. Currently, there is a significant interest in these materials due to their low CO2 footprint. The typical applications of alkali-activated materials are within civil engineering; however, potential applications as well cementing material within the oil and gas industry are also receiving emerging interest. This paper presents a systematic study of the compressive strength development from 1 to 28 days for metakaolin-based alkali-activated cement. The results show that the compressive strength is highly dependent upon the initial Si/Al ratio in the mix design, as well as the concentration of the activator solution. Furthermore, due to the relatively low initial reactivity of the metakaolin material used, different types of co-binders were included in the slurry composition to improve early strength development. The two different co-binders tested were another, more reactive metakaolin material and Blast Furnace Slag (GGBFS). It was found that both these co-binders performed as intended, by ensuring early strength development via precipitation of K-A-S-H and C-A-S-H gels, respectively, and also by enabling subsequent strength development due to improved dissolution of the low-reactive metakaolin.

HEIDELBERG MATERIALS' CO2 roadmap On the way to carbon neutrality

AbstractAt its Capital Markets Day in May 2022 Heidelberg Materials published the commitment to reduce specific CO2 emissions by almost 50 % to 400 kg CO2 per ton of cementitious material by 2030, the most ambitious target in the sector. This article provides an overview of some key elements of the roadmap established to achieve this ambition and to pave the way to achieve carbon neutrality of concrete. Three central themes will be highlighted in this article: Carbon capture and storage projects are an indispensable cornerstone to ultimately produce CO2 free cement The reduction of clinker in cement and concrete and the development and utilization of new or alternative cementitious materials are highlighted as major levers to reduce CO2 The possibility to create fully circular concrete by advanced recycling technologies and to use recycled concrete paste for CO2 mineralization are illustratedCombined with several other initiatives ‐ energy efficiency, alternative fuels and raw materials, more efficient use of concrete, to name a few ‐ substantial progress can be made on the way to carbon neutrality of concrete.

Flowability and Strength Characteristics of Binary Cementitious Systems Containing Silica Fume, Fly Ash, Metakaolin, and Glass Cullet Powder.

The present study examines the effects of supplementary cementitious materials (SCMs) on the flowability and strength development of binary mixes. This study was primarily motivated by the need to bridge the knowledge gap regarding paste and mortar mixes containing binary cement from a variety of performance perspectives. This study examined the flowability and strength development of binary mixes in their pastes and mortars when they contain various doses of silica fume (SF), fly ash (FA), metakaolin (MK), and glass cullet powder (GP) compared with the control mix. While the presence of SF and MK reduced workability because of the nature of their particles, the addition of FA and GP improved it to a certain extent because of the spherical and glassy nature of their particles, respectively. In addition, GP was used to compare its performance against SF, MK, and FA as an alternative cementitious material. In this study, the GP performed comparably to the other SCMs investigated and was found to be satisfactory. An investigation of the rheological properties, heat of hydration, thermal analysis, and pore systems of these mixes was conducted. Compared to the control mix, the presence of 5% GP improved the rheological properties and reduced the heat of hydration by 10%. The reduced workability in SF and MK mixes resulted in a lower content of pore water, while GP and FA incorporation enhanced it, owing to improved workability. The pore area is related to the pore water, which is directly related to improved workability. According to the following order, SF > MK > GP > FA, the strength was highest for mixes containing SF and MK, whereas, with GP and FA, there was a gradual reduction in the strength proportional to replacement level and improved workability. SF, GP, and FA can be identified as performance enhancers when formulating ternary and quaternary cementitious systems for low-carbon cement.

Utilization of nanoparticles and waste materials in cement mortars

Abstract Cement has shaped the modern built environment, but its production generates substantial carbon dioxide emissions. Consequently, there is an urgent need to identify alternative cementitious building materials for sustainable construction. In this study, cement mortars (CMs) were produced by partially replacing cement with nanoclay (NC) and granite dust (GD). The replacement proportions (% by weight of cement) of these materials were 1.5, 3, and 4.5% for NC and 10, 20, and 30% for GD. For mortars containing NC but not GD, the strength was maximized when the NC replacement proportion was 3%. To evaluate the combined effect of partially replacing cement with both NC and GD on the fresh and hardening properties of cement-blended mortars, ternary binder mixtures containing 3% NC together with 10, 20, or 30% GD were prepared, and their workability, bulk density, compressive strength (at 7, 28, and 90 days), and flexural strength were measured. Increasing the content of NC and/or GD reduced the flowability of these mortars relative to that of the reference mortar mix because it increased the content of fine materials. CM containing 3% NC and 10% GD had the highest compressive strength at 7, 28, and 90 days while also having the greatest flexural strength when compared to the control mix. This is most likely due to the high silica and alumina content of NC and GD, as well as their high specific surface area, which would improve the maturity and density of the matrix when compared to cement alone.

Performance of cement-based materials incorporating ultra-fine copper slag

The application of copper slag (CS) as a supplementary cementitious material in concrete is unsatisfactory due to the fact that CS is mainly composed of fayalite. The dissolution kinetics of fayalite determines the pozzolanic activity of CS. How to improve the dissolution of fayalite is a challenge for CS resource utilization. To address this issue, ultra-fine CS with different fineness was fabricated by wet-grinding method for the first time in this work and the performance of cement-based materials incorporating ultra-fine CS was assessed. Results revealed that an increase in CS fineness significantly promoted the decomposition of fayalite to improve the mechanical strength of mortars. The 7 d and 28 d strength activity index of ultra-fine CS can reach 106% and 102%, respectively, which has seldom been reported in the literature. Although ultra-fine CS can significantly accelerate the hydration process at the very beginning of reaction to form more hydrates, the early-age pozzolanic activity was still not ideal. The prepared ultra-fine CS exhibited good later-age pozzolanic activity, which can consume more portlandite and generate more hydrates, resulting in a denser microstructure. These results indicated that ultra-fine CS can be used as a high-quality alternative cementitious material to improve the greenness of cement and concrete products.

Elucidating the impact of chemical variability on the nano-structure of Fe-rich slags

Fe-rich silicate slags are promising resources in the production of alternative cementitious materials. In this investigation, molecular dynamics simulations have been employed to provide a comprehensive structural description of a range of binary FeO-SiO2 and ternary CaO-FeO-SiO2 glasses, which are the basis of the slag systems that are observed in the non-ferrous metallurgy. The impact of the chemical variations on the structure of the glasses is assessed. Fe atoms have a slightly more profound role as network modifiers, and Ca as charge compensators for lower SiO2 content. There is a preference of Fe atoms to be associated with free oxygens, as compared to Ca atoms, forming small scale clusters. The obtained results enrich our understanding of the relationship between the composition, the structure and the reactivity of such complex glasses.

An Experimental Investigation on CO2 Adsorption Zero Cement Concrete with Partial Replacement of Aggregates

Abstract: Cement production has a significant environmental impact, causing air pollution in the form of dust, gases, and noise during quarrying and milling. To address this concern, modified cement, a cementitious material that surpasses Portland cement's performance by incorporating recycled and waste materials, is proposed as a sustainable construction option. By reducing the use of raw materials, modified cement can lead to essential environmental benefits. In this experimental study, the feasibility of using sea shell and Titanium Di Oxide as alternative cementitious materials is explored. These materials demonstrate good pozzolanic reactivity and the ability to absorb carbon dioxide from the atmosphere. A mix design based on the Indian standard method of M25 is adopted, and three replacement levels (10%, 15%, and 20%) are considered for investigation. CO2 emissions from cement production are a major concern in the building industry. By utilizing sea shell and Titanium Di Oxide as cement substitutes, this study aims to contribute to energy conservation and environmental preservation. Trial mixes are prepared for each composition, and the results are compared with conventional concrete at different design mixes. The use of sea shell and Titanium Di Oxide as cement alternatives shows potential for achieving CO2 adsorption and reducing environmental impacts. This research offers insights into sustainable construction practices, paving the way for eco-friendly and resource-efficient building materials.

Fresh, hardened and durability properties of concrete made with flyash and limestone based Portland composite cement

Clinker substitution with alternative cementitious materials is one of the way to develop low clinker cement. In this work, three compositions of Portland composite cement (PCC) were prepared by inter-grinding of clinker, gypsum, flyash and limestone where limestone content were kept as 5 %, 7 % and 10 % and flyash content kept as 25% & 35 %. In the present work, study was conducted at 0.60 w/c and in total 4 concrete mixes were designed including one control mix (made with PPC). Fresh properties like air content & fresh density, hardened properties like compressive strength, flexural strength & drying shrinkage and durability behaviour of concrete made with PCC was compared with control concrete. Various durability tests like Rapid chloride permeability test (RCPT), electrical resistivity, accelerated carbonation and sulphate resistance test were carried out to evaluate the performance of concrete made with PCC. The study indicates that with limited addition of limestone i.e., up to 10%, early strength as well as later age strength increases marginally. This may be due to the synergistic effect of flyash and limestone. However, durability aspect was influenced by limestone addition. Test results of RCPT, electrical resistivity as well as sulphate attack indicates the dilution effect of limestone dominates over other physical effects that leads to an overall increase in effective w/c ratio whereas carbonation depth is predominantly affected by the fly as content.

FEASIBILITY OF RECYCLING SILICOMANGANESE SLAG AS A CEMENTITIOUS MATERIAL

The rapid urbanization and industrialization of a country tends to generate large volume of industrial waste in the environment. In this sustainability era, feasibility of recycling industrial waste has gained attention by researchers and industry practitioners. Silicomanganese (SiMn) slag is a common industrial waste produced in the ferro-alloy smelting plant in Sarawak. This paper intends to present a review on the feasibility of recycling SiMn slag into a more sustainable construction material. A desktop study has been conducted to explore the feasibility of SiMn slag on its engineering aspects. Review indicated that SiMn slag is potential to be recycled as an alternative cementitious material. By replacing cement with SiMn slag, it will not only bring the positive impact on the economical aspect but also environmental aspect. This suggestion is critical in responding the call of Sustainable Development Goals (SDGs) of being responsible on the products consumption and production through promoting sustainable use of generated industrial wastes.

Partial Replacement of Cement with Different Wastes - A Review

Abstract: The production of sustainable concrete, the adoption of sustainable practices, and the exploration and utilization of supplementary cementitious materials (SCM) have gained popularity worldwide. The traditional concrete practices and their environmental impact, such as greenhouse gas emissions resulting from cement production, make researchers and industries look for alternative cementitious materials. This paper reviews the SCM Bamboo leaves ash, coconut shell ash, eggshell powder, fly ash, GGBS (ground granulated blast furnace slag), paper sludge ash, waste glass powder, rice husk ash, silica fume, steel slag, sugarcane bagasse ash, water hyacinth, and wheat straw ash, their performance to improve strength and durability properties, as well as their impact on the concrete mix. The main purpose of this review paper is to study and evaluate the possibilities of cement replacement material in the production of sustainable concrete. This review article gives information about SCM and how these materials can help reduce the environmental impact of conventional concrete and promote the development of sustainable concrete and environmentally friendly construction practices.