Performance degradation and damage model of rice husk ash concrete under dry–wet cycles of sulfate environment

Yao, Weijing; Bai, Mengyu; Pang, Jianyong; Liu, Tao

doi:10.1007/s11356-022-19955-9

Cited by 13 publications

(2 citation statements)

References 31 publications

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“…The relative dynamic elastic modulus [39,40] can be used to reflect the internal damage of concrete specimens after dry-wet cycles in a sulfate environment and to evaluate the durability of concrete. Using an NN-4B non-metallic ultrasonic testing analyzer to measure the relative wave velocity of the sample, to calculate the relative dynamic elastic modulus of the specimen, the following formula [41] was used:…”

Section: Relative Dynamic Elastic Modulus Analysismentioning

confidence: 99%

Mechanical Properties and Microstructure of Rubber Concrete under Coupling Action of Sulfate Attack and Dry–Wet Cycle

Heng

Pang

2023

Sustainability

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In order to study the mechanical properties of rubber concrete (RC) with different rubber particle sizes after dry–wet cycles in a sulfate environment, apparent morphology analysis, mass loss analysis, relative dynamic elastic modulus analysis, compressive strength loss analysis, internal microscopic characteristics and deterioration degree analysis of ordinary concrete (NC) and rubber concrete after dry–wet cycles were compared and analyzed. The results show that with the increase in the number of dry–wet cycles, the surface caves of rubber concrete increase, the internal microcracks develop and penetrate, and the macroscopic strength increases first and then decreases significantly. The high elasticity of rubber effectively improves the expansion force caused by sulfate attack and the dry–wet cycle. The deterioration degree of RC in each dry–wet cycle stage is obviously better than that of NC. When the rubber particle size is 0.85 mm, the performance of the sample is the best. After 120 days of dry–wet cycle, the compressive strength is reduced by 37.4%, and the compressive strength of concrete with a rubber particle size of 0.85 mm is reduced by 11.2%. After cyclic loading, the deterioration degree of concrete is 5.1% lower than that of ordinary concrete.

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Section: Relative Dynamic Elastic Modulus Analysismentioning

confidence: 99%

Mechanical Properties and Microstructure of Rubber Concrete under Coupling Action of Sulfate Attack and Dry–Wet Cycle

Heng

Pang

2023

Sustainability

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“…As it includes roughly 85–90% amorphous silica, RHA may be effectively recycled as a pozzolanic material as opposed to being discarded publicly. The use of RHA in concrete has been researched by different scientists [ 7 , 8 , 9 ]. The research on RHA is mostly conducted in Agricultural countries as shown in Figure 1 .…”

Section: Introductionmentioning

confidence: 99%

Forecasting Compressive Strength of RHA Based Concrete Using Multi-Expression Programming

et al. 2022

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Rice husk ash (RHA) is a significant pollutant produced by agricultural sectors that cause a malignant outcome to the environment. To encourage the re-use of RHA, this work used multi expression programming (MEP) to construct an empirical model for forecasting the compressive nature of concrete made with RHA (CRHA) as a cement substitute. Thus, the compressive strength of CRHA was developed comprising of 192 findings from the broad and trustworthy database obtained from literature review. The most significant characteristics, namely the specimen’s age, the percentage of RHA, the amount of cement, superplasticizer, aggregates, and the amount of water, were used as input for the modeling of CRHA. External validation, sensitivity analysis, statistical checks, and Shapley Additive Explanations (SHAP) analysis were used to evaluate the models’ performance. It was discovered that the most significant factors impacting the compressive strength of CRHA are the age of the concrete sample (AS), the amount of cement (C) and the amount of aggregate (A). The findings of this study have the potential to increase the re-use of RHA in the production of green concrete, hence promoting environmental protection and financial gain.

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Strength deterioration of karst fillings under dry–wet cycles: Testing and modeling study

Liu

Yang²,

Zhang

et al. 2023

Bull Eng Geol Environ

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Performance degradation and damage model of rice husk ash concrete under dry–wet cycles of sulfate environment

Cited by 13 publications

References 31 publications

Mechanical Properties and Microstructure of Rubber Concrete under Coupling Action of Sulfate Attack and Dry–Wet Cycle

Mechanical Properties and Microstructure of Rubber Concrete under Coupling Action of Sulfate Attack and Dry–Wet Cycle

Forecasting Compressive Strength of RHA Based Concrete Using Multi-Expression Programming

Strength deterioration of karst fillings under dry–wet cycles: Testing and modeling study

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