Experimental investigation on compressive strength of concrete with sticky rice pulp at different ages (the experiment of concrete with sticky rice pulp)

• Published in: Structural concrete : journal of the FIB Vol. 22; no. S1; pp. E884 - E897
• Main Authors: Zhang, Huzhi, Zhou, Xiaofeng, Wang, Gongxun, He, Peigen, Yang, Qunyu, Shang, Yucheng
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY‐VCH Verlag GmbH & Co. KGaA 01.01.2021; Wiley Subscription Services, Inc
• Subjects: Adhesive strength; Age; Cementation; Compressive strength; concentration of sticky rice pulp; Concrete; concrete with sticky rice pulp; Ethnic foods; History of engineering; Influence functions; Mathematical analysis; Mechanical properties; retarding effect; Substrates; template effect
• ISSN: 1464-4177; 1751-7648
• DOI: 10.1002/suco.202000196

The combination of sticky rice pulp and tabia is a building material in ancient China, while the concrete preparation with sticky rice pulp instead of water is a new concept, and exploratory experimental study on its working and mechanical properties is indispensable. Therefore, on the basis of concrete substrates of Chinese C25, sticky rice pulp with different concentrations was used to replace water to complete the preparation of concrete, and its slump and compressive strength test under different ages was carried out. The results showed that sticky rice pulp could be a retarder and reduce the water‐cement ratio to a certain extent, and amylopectin in sticky rice pulp could also play the role of template. In addition, there is cementation of coarse and fine aggregate by adhesive components in sticky rice pulp. These effects cause the compressive strength of concrete to decrease at the early stage and increase at the later stage, and in terms of strength alone, the optimal concentration of sticky rice pulp that replaces water is about 1%. According to the test results, the influence functions of cube compressive strength of concrete with sticky rice pulp at 3d and 28d ages, as well as the correlation function of cube compressive strength and two variables about concentration and age of sticky rice pulp were also fitted. The results of the above series of exploration provide basis for the engineering application of concrete with sticky rice pulp in future, which is an environmentally friendly building material.