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Estimation of restrained expansion strain of reinforced expansive concrete considering mixture and curing conditions
Highlights The concept to predict restrained strain in expansive concrete is proposed. The tests were conducted by considering factors which affect expansion rate. An equation of reduction factors is proposed by considering the studied factors. Effective free strain can be used to predict the restrained expansion strain.
Abstract Several standards have been used as guidelines for expansive concrete design. However, all of these standards still do not consider several factors that affect the level of expansion such as the incorporation of fly ash, curing temperature, and curing condition. The main objective of this study is to estimate the restrained expansion strain of reinforced expansive concrete by including several factors which affect level of expansion. This research determines the effective free expansion strain of expansive concrete, which is the expansion strain after eliminating the loss of expansion due to the effects of pores filling by expansive products and compression creep during early age restrained expansion. This effective free expansion strain is used as the input of finite element (FE) analysis to estimate the restrained expansion strain. A reduction factor is introduced to account for the loss of expansion. It was found that by the application of the proposed reduction factor, the tested restrained expansion results of specimens with various mixture and curing conditions can be predicted satisfactorily.
Estimation of restrained expansion strain of reinforced expansive concrete considering mixture and curing conditions
Highlights The concept to predict restrained strain in expansive concrete is proposed. The tests were conducted by considering factors which affect expansion rate. An equation of reduction factors is proposed by considering the studied factors. Effective free strain can be used to predict the restrained expansion strain.
Abstract Several standards have been used as guidelines for expansive concrete design. However, all of these standards still do not consider several factors that affect the level of expansion such as the incorporation of fly ash, curing temperature, and curing condition. The main objective of this study is to estimate the restrained expansion strain of reinforced expansive concrete by including several factors which affect level of expansion. This research determines the effective free expansion strain of expansive concrete, which is the expansion strain after eliminating the loss of expansion due to the effects of pores filling by expansive products and compression creep during early age restrained expansion. This effective free expansion strain is used as the input of finite element (FE) analysis to estimate the restrained expansion strain. A reduction factor is introduced to account for the loss of expansion. It was found that by the application of the proposed reduction factor, the tested restrained expansion results of specimens with various mixture and curing conditions can be predicted satisfactorily.
Estimation of restrained expansion strain of reinforced expansive concrete considering mixture and curing conditions
Prayuda, Hakas (author) / Dumaru, Rasla (author) / Tanapornraweekit, Ganchai (author) / Tangtermsirikul, Somnuk (author) / Saengsoy, Warangkana (author) / Matsumoto, Koji (author)
2022-01-07
Article (Journal)
Electronic Resource
English
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