Abstract: High-performance engineered cementitious composites (ECC) have a high ultimate tensile strain compared with the normal concrete, which could be used to prevent the cracking and leakage problems for concrete infrastructure. The mechanical properties of ECC strongly depended on the raw materials. Meanwhile, based on the same raw materials, ECC material properties are mainly controlled by its mix proportion. Based on the materials and industrial wastes in Kunming Yunnan province, the uniform design experiment method (UDEM) with alternating conditional expectations (ACE) which is a non-parametric regression analysis (NPRA) method are chosen to obtain the optimal mix proportion range of ECC. The axial tensile tests and thin plate four-point bending test were conducted, and the scanning electron microscope instrument was used to randomly detect fiber dispersion in the tested specimens. The verification tests improved that the optimized ECC mix proportion specimens, which were obtained based on the UDEM-ACE method, gave large ultimate tensile strain capacity and energy absorption capacity, and the fiber distribution was uniformed. Some reference values for the application of ECC mix proportion and mixing process based on Kunming in Yunnan Province are provided. This paper can provide theoretical and practical guidance for the mix proportion optimization design of ECC for other regions and the design for other cement-based materials as well.
李晓琴, 杨潇, 丁祖德, 申林方, 杜茜. 基于UDEM-ACE方法的ECC配合比优化设计[J]. 材料导报, 2019, 33(14): 2354-2361.
LI Xiaoqin, YANG Xiao, DING Zude, SHEN Linfang, DU Xi. Optimized Mix Proportion Design of ECC Based on the UDEM-ACE Method. Materials Reports, 2019, 33(14): 2354-2361.
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2019, Vol. 33 
