Experimental study on tensile mechanical property of grid reinforced UHPC plates

被引：3
|
作者：
Zhou Z. [1 ]
Zhang Y. [1 ]
Wang Y. [2 ]
Han F. [3 ]
Tian H. [1 ]
Peng Z. [1 ]
机构：
[1] Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing
[2] School of Architecture Engineering, Nanjing Institute of Technology, Nanjing
[3] Jiangsu Sobute New Materials Co., Ltd., Nanjing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2019年 / 49卷 / 04期
关键词：
Gird layer; Gird processing method; Gird type; Grid; Plate tensile test; Ultra-high performance concrete;
D O I：
10.3969/j.issn.1001-0505.2019.04.001
中图分类号：
学科分类号：
摘要：
To improve the workability, tensile strength and ductility of ultra-high performance concrete (UHPC) thin-walled structure, the tensile mechanical property of gird reinforced UHPC plates is studied. Four kinds of girds available in the market were used to fabricate the grids reinforced UHPC plates, combined with ultra-high performance concrete with steel fibers of 1% volume fraction. The effects of different gird types, gird processing methods and number of gird layers on the mechanical property and cracking patterns of grids reinforced UHPC plates were investigated by uniaxial tensile tests. The results indicate that carbon fiber girds have a remarkable reinforcing effect on UHPC. However, the performance of carbon fiber grids reinforced UHPC depends on the bonding conditions between grids and UHPC matrix. Epoxy resin impregnation and sand covering are effective ways to ensure satisfied bonding conditions.The bonding conditions between stainless steel grids and UHPC matrix are good enough, which makes the cracking load and peak load of the specimens increase. Meanwhile, the number of cracks increases and the ductility of specimens improves significantly, with the increase of the number of grid layers.The reinforcing effect of carbon-glass fiber hybrid grids is unsatisfied due to poor bonding conditions of the grids and UHPC matrix caused by the premature debonding of the adhesive layer. Due to the limited bearing capacity of the basalt grid itself, the reinforcing effect of basalt girds is not obvious. © 2019, Editorial Department of Journal of Southeast University. All right reserved.
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页码：611 / 617
页数：6
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