Bonding behavior between reactive powder concrete and normal strength concrete
Bonding behavior between reactive powder concrete and normal strength concrete
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活性粉末混凝土与普通强度混凝土的粘结性能
DOI：
10.1016/j.conbuildmat.2020.118024
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发表时间：
2020-05-10
影响因子：
7.4
通讯作者：
Wang, Dehong
中科院分区：
文献类型：
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作者：
Ju, Yanzhong;Shen, Tong;Wang, Dehong
为了研究活性粉末混凝土（RPC）与普通混凝土（NSC）的粘结性能，通过81个试件的劈拉试验和27个试件的双剪试验，研究了RPC水胶比（W/B）、钢纤维体积分数和界面粗糙度对RPC与NSC粘结性能的影响。结果表明，影响RPC粘结剪切强度和劈裂抗拉强度的主要因素是界面粗糙度，其次是RPC W/B，最后是钢纤维体积分数。界面粗糙度在2.11- 6.01mm范围内增加，钢纤维体积分数在1%~ 2%范围内增加，可以提高劈拉强度和剪切强度。RPC的W/B在0.2-0.24范围内增加对劈拉强度的影响为正，但抗剪强度随RPC W/B的增加先增加后降低，在0.22 W/B时出现最大值。根据试验结果，提出了考虑界面处理的NSC-RPC抗剪强度计算公式。(C)2020爱思唯尔有限公司保留所有权利。
In order to investigate the bonding behavior between reactive powder concrete (RPC) and normal strength concrete (NSC), splitting tensile test of 81 specimens and double shear test of 27 specimens were conducted, the effects of water-to-binder ratio (W/B) of RPC, steel fibre volume fraction, and interfacial roughness on RPC-to-NSC bonding were investigated. The results showed that the interfacial roughness was the most important factor affecting the bonding shear strength and splitting tensile strength, followed by the RPC W/B, and finally the steel fibre volume fraction. The increase of interfacial roughness in the range of 2.11-6.01 mm and the steel fibre volume fraction in the range of 1%-2% can improve the splitting tensile strength and shear strength. The effect of RPC W/B increase in the range of 0.2-0.24 on the splitting tensile strength was positive, but the shear strength increased first and then decreased with the increase of RPC W/B, the maximum shear strength appeared at 0.22 W/B. Based on the test result, a NSC-RPC shear strength formula considering the interfacial treatment was proposed. (C) 2020 Elsevier Ltd. All rights reserved.