Issue 43

S. Jing et alii, Frattura ed Integrità Strutturale, 43 (2018) 33-42; DOI: 10.3221/IGF-ESIS.43.02 33 Experimental study on uniaxial tensile and compressive behavior of high toughness cementitious composite ShiYong Jiang Training Department, Logistical Engineering University. Chongqing, 401311, P.R. China jiangshiy@163.com Shuai Tao, Wei Fei, XueYang Li Civil Engineering Department, Logistical Engineering University. Chongqing, 401311, P.R. China taos0313@163.com , 1063408903@qq.com , tmlt92@163.com A BSTRACT . Though the principle of orthogonal experimental design, the uniaxial compression experiment and uniaxial tensile experiment were carried out on nine groups of high toughness cementitious composites with different mixing ratios to study the influence of four factors, namely fly ash content, water-binder ratio, sand-binder ratio and plasticizer content on the compressive strength and ultimate tensile strain of high toughness cementitious composites. The experiment results show that PVA fibers content greatly influenced the flexural behavior and the influence of the four factors on the compressive strength and ultimate tensile strain of high toughness cementitious composite is basically the same, the primary and secondary order is: water-binder ratio, fly ash content, plasticizer content and sand-binder ratio. K EYWORDS . High toughness cementitious composite; Orthogonal experiment design; Mixing ratio; Compressive strength; Ultimate tensile strain. Citation: S. Jing, S. Tao, W. Fei, X.Y. Li, Experimental study on uniaxial tensile and compressive behavior of high toughness cementitious composite, Frattura ed Integrità Strutturale, 43 (2017) 33-42. Received : 07.08.2017 Accepted : 05.09.2017 Published : 01.01.2018 Copyright: © 2018 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION igh toughness cementitious composite is a new type of composite material which is formed by the incorporation of monofilament staple fibers into the cement matrix and homogeneously dispersed. It is also called engineered cementitious composite (ECC), which was initially developed by Victor C. Li [1, 2]. This material can generate multiple fine cracks in the tension process. Ultimate tensile strain may reach several hundred times that of ordinary concrete, while the stress may increase when the strain increases, so it has a quasi-strain hardening property and excellent toughness [3, 4]. ECC can be used in road surface, bridge and dam maintenance as well as aseismic hardening or serves as a new important material for new structures [5]. However, at present there is no recognized ECC mix design. Besides, there are no established norms or standards proposed regarding the regularities between mixing ratios and the mechanical H