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Affiliation of Author(s):

土木工程学院

Journal:

Materials and Design

Key Words:

中文关键字：Experiments;Freezing;Pore structure; Reinforced co，英文关键字：Experiments;Freezing;Pore structure; Reinforced co

Abstract:

Properties of plain concrete and steel fiber reinforced concrete (SFRC) (with volume fraction of 0.5%, 1%, 1.5% and2%) subjected to freeze-thaw cycles in water and in the 3.5% NaCl solution were investigated in this paper. Through the experiment, surface damage, weight loss and splitting tensile strength loss of SFRC were measured after different numbers of freeze-thaw circulations. The microstructure and the pore structure of SFRC were analyzed on the basis of scanning electron microscope (SEM) and mercury intrusion experiment. The test results show that the use of steel fiber could improve the pore structure and decelerate the damage of concrete during freeze-thaw cycles. However, the ability of steel fiber to reduce surface scaling of concrete is limited subjected to freeze-thaw cycles in the NaCl solution. Furthermore, the weight loss and the splitting tensile strength loss of concrete tested in the NaCl solution were larger than those in water. It is also shown that the steel fiber content has the great influence on the frost-resisting property of SFRC. When a relatively steel fiber content is introduced (1.5 vol.%), the deterioration process of concrete subjected to the frost damage is considerably reduced.

Note:

牛荻涛

Co-author:

JiangLei,BaiMin,MiaoYuanyao

First Author:

niuditao

Indexed by:

Journal paper

Volume:

卷：44

Issue:

期：

Page Number:

页：267-273

Translation or Not:

no

Date of Publication:

2013-02-01