文献类型：期刊文献

英文题名：Experimental and numerical explorations on the optimized applications of SCDA in cracking concrete blocks

作者：Zhong, Zhen[1,2];Zhang, Hao[1];Hu, Yunjin[1,2];Lou, Rong[3];Tao, Pan[1];Liu, Jie[1,2]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Ctr Rock Mech & Geohazards, Shaoxing 312000, Peoples R China;[3]Huahui Engn Design Grp Corp Ltd, Shaoxing 312000, Peoples R China

年份：2023

卷号：206

外文期刊名：MEASUREMENT

收录：SCI-EXPANDED(收录号：WOS:000901681000001)、、EI(收录号：20225113268685)、Scopus(收录号：2-s2.0-85144091036)、WOS

基金：This work was funded by National Natural Science Foundation of China (grant number 51509154) , Natural Science Foundation of Zhe- jiang Province (grant number LGJ20E090001) , International Scientific and Technological Cooperation Projects of Shaoxing University (grant number 2019LGGH1008) . All the supports are gratefully acknowledged.

语种：英文

外文关键词：SCDA; Concrete blocks; Maximum expansion pressure; RFPA2D; Effective cracking area

外文摘要：For effective applications of a soundless chemical demolition agent (SCDA) in fragmenting concrete blocks, experimental and numerical investigations were conducted. Firstly, the maximum expansion pressures under varying water/SCDA ratio, water temperature, and hole diameter were determined via experimental tests. Then, cracking experiments were performed on lab-scale concrete blocks with two predrilled holes by using strain gouge and acoustic emission tool. It was observed hole diameter exerts a primary control on the cracking process. The cracking process is generally divided into three stages, named micro-cracking stage, macro-cracking stage, and failure stage. Furthermore, two-dimensional realistic failure process analysis (RFPA2D) code was applied to reproduce the failure process of laboratory concrete blocks. The verified model was employed to simulate the cracking process of meter-scale concrete specimens with multi-holes of staggered and square arrangements. Empirical equations were formulated to correlate the cracking area with the hole diameter, spacing, and tensile strengths of concrete.