A study on engineering properties and environmental impact of sustainable concrete with fly ash or GGBS

Liu, Zihao; Takasu, Koji; Koyamada, Hidehiro; Suyama, Hiroki

doi:10.1016/j.conbuildmat.2021.125776

Cited by 64 publications

(30 citation statements)

References 39 publications

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“…The concrete ingredient that contributes the most to GHG is Portland cement (PC). It is estimated that, by 2050, the consumption of cement will grow from the current 4.2 to 5.2 billion tons [50,51]. Using the present techniques of cement production, about 850 kg of CO 2 is released into the atmosphere per each ton of clinker produced [52].…”

Section: Research Significancementioning

confidence: 99%

“…Agricultural wastes such as palm oil fuel ash (POFA), rice husk ash (RHA), olive pomace ash (OOA), sugarcane bagasse ash (SBA), and industrial wastes such as fly ash (FA) and silica fume (SF) can be used as partial replacements for cement in sustainable concrete [58,59]. It is annually estimated that the worldwide production of fly ash surpasses 900 million tons [60], with 580 million tons produced in China [61], 43.5 million tons of contribution by the United States [62], 169.25 million tons in India [63], and 14 million tons in Australia [51]. Fly ash has been used for centuries as an ingredient in cement, but its current utilization rate is only about 53.5% [60].…”

Section: Research Significancementioning

confidence: 99%

“…Fly ash has been used for centuries as an ingredient in cement, but its current utilization rate is only about 53.5% [60]. Waste management can lead to a number of problems, including pollution, water shortages, and the spread of disease [51]. Over the past few years, much investigation has been carried out on the application of concrete with mineral admixtures.…”

Section: Research Significancementioning

confidence: 99%

“…Mabibi reported [70] that concrete's resistance and chloride migration coefficient could be improved by replacement with fly ash, as could the alkali-silicon reaction, although carbonization resistance would be reduced. As for fine aggregates and cement, Liu et al [51] investigated shrinkage in creep and curing, compression strength, and carbon dioxide emissions from concrete containing fly ash or ground granulated blast-furnace slag (GGBS). Their proposed model accurately predicted the creep strain of concrete by including a parameter to take into account the effect of fly ash content.…”

Section: Research Significancementioning

confidence: 99%

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Multi-Objective Optimization of Sustainable Concrete Containing Fly Ash Based on Environmental and Mechanical Considerations

et al. 2022

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Infrastructure design, construction and development experts are making frantic efforts to overcome the overbearing effects of greenhouse gas emissions resulting from the continued dependence on the utilization of conventional cement as a construction material on our planet. The amount of CO2 emitted during cement production, transportation to construction sites, and handling during construction activities to produce concrete is alarming. The present research work is focused on proposing intelligent models for fly ash (FA)-based concrete comprising cement, fine and coarse aggregates (FAg and CAg), FA, and water as mix constituents based on environmental impact (P) considerations in an attempt to foster healthier and greener concrete production and aid the environment. FA as a construction material is discharged as a waste material from power plants in large amounts across the world. Its utilization as a supplementary cement ensures a sustainable waste management mechanism and is beneficial for the environment too; hence, this research work is a multi-objective exercise. Intelligent models are proposed for multiple concrete mixes utilizing FA as a replacement for cement to predict 28-day concrete compressive strength and life cycle assessment (LCA) for cement with FA. The data collected show that the concrete mixes with a higher amount of FA had a lesser impact on the environment, while the environmental impact was higher for those mixes with a higher amount of cement. The models which utilized the learning abilities of ANN (-BP, -GRG, and -GA), GP and EPR showed great speed and robustness with R2 performance indices (SSE) of 0.986 (5.1), 0.983 (5.8), 0.974 (7.0), 0.78 (19.1), and 0.957 (10.1) for Fc, respectively, and 0.994 (2.2), 0.999 (0.8), 0.999 (1.0), 0.999 (0.8), and 1.00 (0.4) for P, respectively. Overall, this shows that ANN-BP outclassed the rest in performance in predicting Fc, while EPR outclassed the others in predicting P. Relative importance analyses conducted on the constituent materials showed that FA had relatively good importance in the concrete mixes. However, closed-form model equations are proposed to optimize the amount of FA and cement that will provide the needed strength levels without jeopardizing the health of the environment.

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Section: Research Significancementioning

confidence: 99%

Section: Research Significancementioning

confidence: 99%

Section: Research Significancementioning

confidence: 99%

Section: Research Significancementioning

confidence: 99%

See 2 more Smart Citations

Multi-Objective Optimization of Sustainable Concrete Containing Fly Ash Based on Environmental and Mechanical Considerations

et al. 2022

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“…Nevertheless, Refs. [24][25][26] observed that concrete with 30% GGBS exhibits 20% lower drying shrinkage. Refs.…”

Section: Introductionmentioning

confidence: 99%

Curing Effect on Durability of Cement Mortar with GGBS: Experimental and Numerical Study

et al. 2022

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In this paper, supplementary cementitious materials are used as a substitute for cement to decrease carbon dioxide emissions. A by-product of the iron manufacturing industry, ground granulated blast-furnace slag (GGBS), known to improve some performance characteristics of concrete, is used as an effective cement replacement to manufacture mortar samples. Here, the influence of curing conditions on the durability of samples including various amounts of GGBS is investigated experimentally and numerically. Twelve high-strength Portland cement CEM I 52.5 N samples were prepared, in which 0%, 45%, 60%, and 80% of cement were substituted by GGBS. In addition, three curing conditions (standard, dry, and cold curing) were applied to the samples. Durability aspects were studied through porosity, permeability, and water absorption. Experimental results indicate that samples cured in standard conditions gave the best performance in comparison to other curing conditions. Furthermore, samples incorporating 45% of GGBS have superior durability properties. Permeability and water absorption were improved by 17% and 18%, respectively, compared to the reference sample. Thereafter, data from capillary suction experiments were used to numerically determine the hydraulic properties based on a Bayesian inversion approach, namely the Markov Chain Monte Carlo method. Finally, the developed numerical model accurately estimates the hydraulic characteristics of mortar samples and greatly matches the measured water inflow over time through the samples.

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Experimental Study on the Mechanical Properties of the Agro Waste as a Partial Replacement of the Binder Material

Vighash,

Sabarigirivasan

2023

Lecture Notes in Civil Engineering

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A study on engineering properties and environmental impact of sustainable concrete with fly ash or GGBS

Cited by 64 publications

References 39 publications

Multi-Objective Optimization of Sustainable Concrete Containing Fly Ash Based on Environmental and Mechanical Considerations

Multi-Objective Optimization of Sustainable Concrete Containing Fly Ash Based on Environmental and Mechanical Considerations

Curing Effect on Durability of Cement Mortar with GGBS: Experimental and Numerical Study

Experimental Study on the Mechanical Properties of the Agro Waste as a Partial Replacement of the Binder Material

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