Improving the sulfate attack resistance of concrete by using supplementary cementitious materials (SCMs): A review

Elahi, Manjur A; Shearer, Christopher R.; Reza, Abu Naser Rashid; Saha, Ashish Kumer; Khan, Nabi Newaz; Hossain, M. M.; Sarker, Prabir Kumar

doi:10.1016/j.conbuildmat.2021.122628

Cited by 142 publications

(41 citation statements)

References 80 publications

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“…This is unreasonable. Previous studies have shown that prolongation of the initial moisture curing time is beneficial to cement hydration and pore structure development, and sulphate attack resistance should not decrease with prolongation of the initial moisture curing time [23,27]. Therefore, the compressive strength cannot be used as an index to evaluate sulphate attack resistance of rectangular mortars in semi-immersion tests.…”

Section: Sulphate Attackmentioning

confidence: 99%

“…Compared to silica fume and fly ash, metakaolin has a very high reactivity level [23]. Previous studies have shown that metakaolin can increase the mechanical strength of concrete to varying degrees, depending mainly on the replacement rate of metakaolin, the water/binder ratio, and the age at testing [22,23,27]. Remarkably, metakaolin has a positive effect on reducing drying shrinkage and improving durability [22,23,[27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ultrafine Metakaolin on the Properties of Mortar and Concrete

et al. 2021

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This study investigated the influence of ultrafine metakaolin replacing cement as a cementitious material on the properties of concrete and mortar. Two substitution levels of ultrafine metakaolin (9% and 15% by mass) were chosen. The reference samples were plain cement concrete sample and silica fume concrete sample with the same metakaolin substitution rates and superplasticizer contents. The results indicate that simultaneously adding ultrafine metakaolin and a certain amount of polycarboxylate superplasticizer can effectively ensure the workability of concrete. Additionally, the effect of adding ultrafine metakaolin on the workability is better than that of adding silica fume. Adding ultrafine metakaolin or silica fume can effectively increase the compressive strength, splitting tensile strength, resistance to chloride ion penetration and freeze–thaw properties of concrete due to improved pore structure. The sulphate attack resistance of mortar can be improved more obviously by simultaneously adding ultrafine metakaolin and prolonging the initial moisture curing time.

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Section: Sulphate Attackmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Ultrafine Metakaolin on the Properties of Mortar and Concrete

et al. 2021

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“…Indeed, due to the use of SCMs, differences in the microstructure are observed in cement and concrete, consisting in the reduction of the total volume of open pores in the hardened cement paste and in the contact zone between paste and aggregate grains. This improves the performances of cement-based composites, especially in terms of durability, or of resistance to an aggressive environment (due to carbonation [ 9 ], presence of chloride ions [ 10 ], sulphates [ 11 ], etc. ), by increasing, for instance, water tightness [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Special Issue: Supplementary Cementitious Materials in Concrete, Part I

Fantilli

Jóźwiak–Niedźwiedzka

2021

Materials

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“…Recent studies showed that replacing cement with SCMs enhances economical and sustainable construction [24][25][26]. CO 2 emissions per unit compressive strength of concrete are reduced when 20% cement is replaced with SCMs [27,28]. Besides the environmental benefits, replacing with SCMs increases the mechanical strength of concrete due to their pozzolanic nature [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

“…Besides the environmental benefits, replacing with SCMs increases the mechanical strength of concrete due to their pozzolanic nature [29][30][31]. In addition, it enhances the durability of concrete due to the improved pore structure [26,27,[32][33][34]. Hence, replacing cement with SCMs is a good choice to reduce the use of cement and enhance concrete strength and durability.…”

Section: Introductionmentioning

confidence: 99%

Modeling Compressive Strength of Eco-Friendly Volcanic Ash Mortar Using Artificial Neural Networking

et al. 2021

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Forecasting the compressive strength of concrete is a complex task owing to the interactions among concrete ingredients. In addition, an important characteristic of the concrete failure surface is its six-fold symmetry. In this study, an artificial neural network (ANN) and adaptive neuro fuzzy interface system (ANFIS) were employed to model the compressive strength of natural volcanic ash mortar (VAM) by using the six-fold symmetry of concrete failure. The modeling was correlated with four parameters. To train and test the projected models, data for more than 150 samples were collected from the literature. Furthermore, mortar samples with varying proportions of volcanic ash were prepared in the laboratory and tested, and the results were used to validate the models. The performance of the developed models was assessed using numerous statistical measures. The results show that both the ANN and ANFIS models accurately predict the compressive strength of VAM with R-square above 0.9 and lower error statistics. The permutation feature analysis confirmed that the age of specimens affects the strength of VAM the most, followed by the water-to-cement ratio, curing temperature, and percentage of volcanic ash.

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Improving the sulfate attack resistance of concrete by using supplementary cementitious materials (SCMs): A review

Cited by 142 publications

References 80 publications

Effect of Ultrafine Metakaolin on the Properties of Mortar and Concrete

Effect of Ultrafine Metakaolin on the Properties of Mortar and Concrete

Special Issue: Supplementary Cementitious Materials in Concrete, Part I

Modeling Compressive Strength of Eco-Friendly Volcanic Ash Mortar Using Artificial Neural Networking

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