Study on Mechanical Properties of Concrete Using Basalt-Based Recycled Aggregate and Varying Curing Conditions

Choi, Hong-Beom; Park, Jin-O

doi:10.3390/ma15134563

Cited by 4 publications

(1 citation statement)

References 46 publications

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“…The study showed that incorporating fly ash can improve the late strength of steam-cured concrete, reduce crack sensitivity, enhance the resistance of steam-cured concrete to chloride ion penetration, and improve the durability of the concrete. Wu Kegang et al [ 15 , 16 , 17 , 18 , 19 ] investigated the impact of high-volume fly ash content on the porosity, including both the macro- and micropores, of steam-cured fly ash concrete. Their study revealed that, under steam-curing conditions, the porosity, including both large and small capillary pores, of steam-cured fly ash concrete was lower than that of standard-cured fly ash concrete when the fly ash content exceeded 40%.…”

Section: Introductionmentioning

confidence: 99%

Influence of Fly Ash Content on the Durability of Mortar Specimens under Dry/Wet Sulfate Attack

Zhang,

Wu,

Wang

et al. 2023

Materials

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To investigate the durability of cementitious materials under complex environmental conditions in Xinjiang, this study conducted durability tests on mortar specimens with different fly ash contents under dry/wet sulfate attack conditions, with standard curing and steam curing at 70 °C. The appearance loss and flexural and compressive strength variations in the specimens were analyzed, and an evolution model of the mortar strength under a dry/wet sulfate attack was established. Moreover, XRD and SEM techniques were used to characterize the erosion products and microstructure, and to explore the erosion resistance mechanism of fly ash cementitious materials. The results showed that, after 160 cycles of erosion, the flexural strength of the specimens decreased with the increase in the fly ash content. In the context of steam-cured mortar specimens, throughout the entire erosion period, specimens with a fly ash content of 45% exhibited the highest relative compressive strength. The established strength evolution model had a minimum determination coefficient of 0.879, indicating a good agreement between the model and experimental results. Microscopic research showed that fly ash would undergo a pozzolanic reaction under the action of sulfate and calcium hydroxide, which was beneficial to the improvement of the erosion resistance. As the fly ash content increased, the erosion products of the specimens gradually became dominated by gypsum.

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Section: Introductionmentioning

confidence: 99%

Influence of Fly Ash Content on the Durability of Mortar Specimens under Dry/Wet Sulfate Attack

Zhang,

Wu,

Wang

et al. 2023

Materials

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ANN‐based analysis of the effect of SCM on recycled aggregate concrete

Mosquera,

Acosta,

Rodríguez

et al. 2024

Structural Concrete

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Rising environmental awareness has prompted in‐depth studies on how the concrete industry affects the environment. Using recycled concrete aggregates (RCAs) and supplementary cementitious materials (SCMs) in concrete manufacturing provides advantages for sustainability. However, the broader chemical composition of SCMs and the inferior qualities of RCAs compared with natural aggregates (NAs) often lead to a decrease in concrete mechanical strength. The difficulty lies in foreseeing how the inclusion of SCMs and RCAs will affect the concrete compressive strength. The artificial neural network (ANN) approach presented herein can precisely forecast the recycled aggregate concrete (RAC) compressive strength, even when incorporates SCMs. The analysis employing the connection weight approach (CWA) determines how input variables influence compressive strength. Results indicate silica fume contributes most to compressive strength, followed by cement content, silica modulus, fine natural aggregate dosage, and coarse natural aggregate. Additionally, the amount of water utilized, the water/cement ratio, and the presence of RCA are all detrimental to compressive strength. The adverse effect of the cementitious materials' alumina modulus can be attributed to increased water demand during their reaction. Performance metrics of the final ANN model on the testing data subset include R2 = 0.94, and RMSE = 3.11, utilizing 834 data observations after outlier treatment for training and validation purposes. In summary, the ANN‐based approach demonstrates its efficacy in predicting concrete compressive strength when incorporating SCMs and RCAs, shedding light on the influential factors in concrete performance.

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ANN approach to evaluate the effects of supplementary cementitious materials on the compressive strength of recycled aggregate concrete

Abellan-Garcia,

Fernández-Gómez,

Iqbal Khan

et al. 2023

Construction and Building Materials

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Study on Mechanical Properties of Concrete Using Basalt-Based Recycled Aggregate and Varying Curing Conditions

Cited by 4 publications

References 46 publications

Influence of Fly Ash Content on the Durability of Mortar Specimens under Dry/Wet Sulfate Attack

Influence of Fly Ash Content on the Durability of Mortar Specimens under Dry/Wet Sulfate Attack

ANN‐based analysis of the effect of SCM on recycled aggregate concrete

ANN approach to evaluate the effects of supplementary cementitious materials on the compressive strength of recycled aggregate concrete

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