喷水法成型纤维网增强水泥基板材抗弯性能

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清华大学辅仁网/2017-07-07

喷水法成型纤维网增强水泥基板材抗弯性能

王振波,张君(

),罗孙一鸣

Flexural performance of textile reinforced cementitious composite with sprinkling water hardening technique

Zhenbo WANG,Jun ZHANG(

),Yiming LUOSUN

Key Laboratory of Civil Engineering Safty and Durability of the Ministry of Education of China, Department of Civil Engineering, Tsinghua University, Beijing 100084, China

摘要:

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文章导读

摘要该文采用喷水硬化工艺制造了玻璃纤维编织网增强水泥基板材,试验研究了配网率和纤维编织网定位方式对其抗弯性能的影响。结果表明: 玻璃纤维编织网可显著改善喷水成型水泥基板材的抗弯性能。随着配网率的增加,纤维网增强水泥基板材的抗弯强度和极限挠度明显提高。配网率为1.0%时,磁铁定位双层纤维网增强水泥基板材抗弯强度达10.64 MPa, 是无增强纤维网板材的3倍; 极限挠度达6.74 mm, 是无增强纤维网板材的8倍。该工艺可解决需要快速搭建又无预拌条件工程的施工问题。

关键词 ：纤维网增强水泥,喷水硬化,抗弯性能

Abstract：Textile reinforced cementitious composite board was produced using a sprinkling water hardening technique. Test measured the effect of the textile ratio and textile location on the flexural performance of the board. The results show that the flexural behavior of the board made with the sprinkling water hardening technique was greatly improved by adding the glass fibers. As the textile ratio increases, the flexural strength and ultimate deflection of the textile glass reinforced cementitious board are greatly increased. The flexural strength of boards with 1.0% textile ratio can reach 10.64 MPa, which is 3 times higher than the boards without textiles, and the ultimate deflection is 6.74 mm, which is 8 times higher than that of the boards without textiles. The sprinkling water hardening technique may solve construction problems where there is no way to directly mix cement with water.

Key words：textile reinforced cementitious composite sprinkling water hardening flexural performance

收稿日期: 2012-12-28 出版日期: 2015-09-03

ZTFLH:

基金资助:国家自然科学基金资助项目(51278278)

引用本文:

王振波, 张君, 罗孙一鸣. 喷水法成型纤维网增强水泥基板材抗弯性能[J]. 清华大学学报（自然科学版）, 2014, 54(5): 551-555.
Zhenbo WANG, Jun ZHANG, Yiming LUOSUN. Flexural performance of textile reinforced cementitious composite with sprinkling water hardening technique. Journal of Tsinghua University(Science and Technology), 2014, 54(5): 551-555.

链接本文:

http://jst.tsinghuajournals.com/CN/或 http://jst.tsinghuajournals.com/CN/Y2014/V54/I5/551

图表:

抗拉强度	弹性模量	极限应变	理论面积
MPa	GPa	%	mm²
1 950	104	1.87	1.25

玻璃纤维编织网性能

玻璃纤维编织网结构示意图

编号	配网率ρ/%	纤维网定位方式
1	0	—
2		粘附底面
3	0.50	螺帽垫起
4		磁铁定位
5 6	1.00	粘附底面磁铁定位

抗弯试件列表

双层纤维编织网结构示意图

试件喷水成型示意图

单层纤维网增强板材弯曲应力挠度曲线

	开裂强度	开裂挠度	极限强度	极限挠度
	MPa	mm	MPa	mm
无纤维网	3.66	0.84	3.66	0.84
纤维网粘附底面	3.12	0.79	3.43	5.19
纤维网螺帽垫起	2.63	0.87	3.90	6.12
纤维网磁铁定位	3.01	0.70	4.65	5.78

单层纤维网增强试块弯曲试验数据

板材开裂形态

双层纤维网增强板材的弯曲应力挠度曲线

双层纤维网增强板材开裂形态

	开裂强度	开裂挠度	开裂强度	极限挠度
	MPa	mm	MPa	mm
纤维网粘附底面	3.30	1.37	6.59	5.84
纤维网磁铁定位	3.24	0.76	10.64	6.74

双层纤维网增强板材抗弯试验数据

开裂强度、抗弯强度随配网率的变化

开裂挠度、极限挠度随配网率的变化

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