المؤلفون: Liding Li, Chunli Wu, Yongchun Cheng, Haitao Wang, Jiaxiang Liang, Wenshuo Zhao

المصدر: Construction and Building Materials. 365:130112

مصطلحات موضوعية: General Materials Science, Building and Construction, Civil and Structural Engineering

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::9b3bc85bc9cf41704fc9e5facb085bb2Test
https://doi.org/10.1016/j.conbuildmat.2022.130112Test

المؤلفون: Liding Li, Chunli Wu, Yongchun Cheng, Xin He, Haitao Wang, Jiaxiang Liang

المصدر: Construction and Building Materials. 327:126940

مصطلحات موضوعية: General Materials Science, Building and Construction, Civil and Structural Engineering

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::06da3508107303f94b0fd29183625191Test
https://doi.org/10.1016/j.conbuildmat.2022.126940Test

المؤلفون: Chunli Wu, Zhiqing Zhu, Ou Ji, Zhang Dongmiao, Guojin Tan, Wensheng Wang, Guojun Cui

المصدر: Construction and Building Materials. 277:122321

مصطلحات موضوعية: Polypropylene, Materials science, Engineered cementitious composite, 0211 other engineering and technologies, 020101 civil engineering, 02 engineering and technology, Building and Construction, engineering.material, 0201 civil engineering, Cracking, chemistry.chemical_compound, Acoustic emission, Flexural strength, chemistry, 021105 building & construction, engineering, General Materials Science, Fiber, Composite material, Ductility, Civil and Structural Engineering, Hardening (computing)

الوصف: Engineered cementitious composite (ECC) with waste superfine river sand (WSRS) and polypropylene (PP) fiber is an economical and sustainable cement-based composite material (WSRSPP-ECC), which has the deformation hardening and multi-cracking characteristics, and affinity for engineering promotion. In this study, acoustic emission (AE) technology was used to monitor the flexural damage process of WSRSPP-ECC thin sheets with different deformability. Based on AE signal features, the damage development and accumulation of WSRSPP-ECC thin sheet under flexural load were analyzed. The results showed that AE signal parameters can capture and describe the transition of different damage stages of WSRSPP-ECC thin sheets. The b-value analysis further showed that the internal micro-cracks characteristics of WSRSPP-ECC thin sheets with various deformability were different in the flexural damage process, which was mainly related to the ability of fibers controlling stable cracking. In view of the smaller fluctuation of AE signals in the first two stages of flexural damage process, three modified indirect AE signal feature parameters including average energy, average waveform coefficient and average frequency were proposed. Then the quantitative relationship models between these three indirect AE signal parameters and flexural ductility as well as crack-controlling capacity of WSRSPP-ECC thin sheet were established. Moreover, through the economic analysis, it is corroborated that WSRSPP-ECC has the higher comprehensive cost performance, and it is a new economical cement-based material suitable for practical engineering application. The production of WSRSPP-ECC by replacing PVA fiber and silica sand with PP fiber and WSRS can not only save cost, and also keep the physical performances, which effectively solves the problems of river channel sedimentation and blocking.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::0224626a8017b20ce5cc570a4171cea2Test
https://doi.org/10.1016/j.conbuildmat.2021.122321Test