Abstract
Clarifying the creep behaviour of concrete at early age not only improves the accuracy of temperature stress analysis but also contributes to prediction accuracy and control measures in cracks caused by thermal stress. However, most past researches on creep behaviour were investigated after 28 days. Currently, it is difficult to accurately perceive the creep behaviour of concrete at an early age in the test method of creep which is generally carried out. Therefore, it is necessary to evaluate the creep behaviour of concrete at early age and to establish a convenient test method to estimate the creep behaviour. Therefore, in this study, experiments were carried out for concrete at early age within one week. As the result of the experiments, it was shown that the creep strain is proportional to the load stress of concrete at an early age and the strain of specific creep decreases as the loaded age increases. In addition, based on the experimental results, an estimation equation for creep strain at early age was proposed. Within the scope of this experimental result, it was confirmed that the estimation equation proposed in this study accurately represented the creep behaviour of concrete at early age.
Highlights
The purpose of this study was to clarify the creep behaviour of concrete at early age.Thermal cracking caused by volume change during heat hydration of cement is an initial defect and greatly affects durability of concrete structures
Experiments using the convenient creep test equipment developed in our laboratory were carried out for concrete at early age
Experiments using the convenient creep test equipment developed in our laboratory were carried out for concrete at early age within one week and we acquired the data for the creep behaviour of concrete at early age
Summary
The purpose of this study was to clarify the creep behaviour of concrete at early age. Thermal cracking caused by volume change during heat hydration of cement is an initial defect and greatly affects durability of concrete structures. One of the cause is that the creep behaviour of concrete at early age has been clarified. There are few studies on the creep behaviour of concrete at early age during heat hydration of cement. The estimation equation that can be used for the thermal stress analysis have been proposed for Morimoto’s research [1], Yoshitake’s research [2], Sakata’s research [3], Ozawa’s research [4], and Iriya’s research [5]. The estimation equation of creep strain at early age that comprehensively evaluated the influence factor including stress/strength ratio, water to cement ratio, and curing temperature has not been proposed so far
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
