含水率对不同强度等级混凝土力学性能的影响试验研究

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发布时间：2020-01-06 00:00:00

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含水率对不同强度等级混凝土力学性能的影响试验研究

Experimental study on the effect of moisture content on the mechanical properties of concrete with different strength grades

2023年第10期

混凝土；湿度；含水率；抗压强度；劈裂抗拉强度；应力-应变

Concrete; Humidity; Moisture content; Compressive strength; Splitting tensile strength; Stress-strain

2023年第10期

10.19761/j.1000-4637.2023.10.032.05

国家自然科学基金项目（52269026）；云南省基础研究计划面上项目（202201AT070104）。

宋致科1，张国辉2，*，顾艳霜2，李虎1，杨茂开1

1.中信建设有限责任公司，北京 100027；2.昆明理工大学电力工程学院，云南昆明 650500

宋致科1，张国辉2，*，顾艳霜2，李虎1，杨茂开1

宋致科,张国辉,顾艳霜,等.含水率对不同强度等级混凝土力学性能的影响试验研究[J].混凝土与水泥制品,2023(10):32-36.

SONG Z K,ZHANG G H,GU Y S,et al.Experimental study on the effect of moisture content on the mechanical properties of concrete with different strength grades[J].China Concrete and Cement Products,2023(10):32-36.

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1000

摘要：通过调整不同浸泡时间（0、2、5、24、120 h）来研究C20、C30及C40混凝土的含水率，并研究了含水率对混凝土抗压强度、劈裂抗拉强度、应力-应变的影响规律。结果表明：随浸泡时间的延长，混凝土的含水率总体表现出前期快速增加，后期缓慢增加，120 h时基本达到饱和状态；混凝土的抗压强度与劈裂抗拉强度均随含水率的增加呈降低趋势，含水率的影响作用显著；在饱和状态下，混凝土的抗压强度、劈裂抗拉强度较干燥状态时的最大降幅分别达36.35%、32.36%；相对较低强度等级混凝土的力学性能对含水率的敏感性更强；随着含水率的增加，混凝土的单轴抗压及劈裂抗拉峰值应变呈下降趋势，单轴抗压及劈裂抗拉应力-应变曲线的上升段斜率逐渐增大。 Abstract: The moisture content of C20, C30 and C40 concrete was studied by adjusting different soaking times(0, 2, 5, 24, 120 h), and the influence of moisture content on the compressive strength, splitting tensile strength, and stress-strain of concrete was studied. The results show that with the extension of soaking time, the moisture content of concrete increases rapidly in the early stage and slowly in the later stage, and basically reaches saturation state at 120 h. The compressive strength and splitting tensile strength of concrete decreases with the increase of moisture content, and the effect of moisture content is significant. The compressive strength and splitting tensile strength of saturated concrete are decreased by 36.35% and 32.36% compared with those of dry concrete. The mechanical properties of relatively lower strength grade concrete are more sensitive to moisture content. With the increase of moisture content, the peak strain of uniaxial compression and splitting tensile of concrete show a downward trend, and the slope of the rising section of uniaxial compression and splitting tensile stress-strain curve increases gradually.

英文名 : Experimental study on the effect of moisture content on the mechanical properties of concrete with different strength grades

刊期 : 2023年第10期

关键词 : 混凝土；湿度；含水率；抗压强度；劈裂抗拉强度；应力-应变

Key words : Concrete; Humidity; Moisture content; Compressive strength; Splitting tensile strength; Stress-strain

刊期 : 2023年第10期

DOI : 10.19761/j.1000-4637.2023.10.032.05

文章编号 :

基金项目 : 国家自然科学基金项目（52269026）；云南省基础研究计划面上项目（202201AT070104）。

作者 : 宋致科1，张国辉2，*，顾艳霜2，李虎1，杨茂开1

单位 : 1.中信建设有限责任公司，北京 100027；2.昆明理工大学电力工程学院，云南昆明 650500

宋致科1，张国辉2，*，顾艳霜2，李虎1，杨茂开1

宋致科,张国辉,顾艳霜,等.含水率对不同强度等级混凝土力学性能的影响试验研究[J].混凝土与水泥制品,2023(10):32-36.

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摘要

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结论

参考文献

引用本文

Abstract: The moisture content of C20, C30 and C40 concrete was studied by adjusting different soaking times(0, 2, 5, 24, 120 h), and the influence of moisture content on the compressive strength, splitting tensile strength, and stress-strain of concrete was studied. The results show that with the extension of soaking time, the moisture content of concrete increases rapidly in the early stage and slowly in the later stage, and basically reaches saturation state at 120 h. The compressive strength and splitting tensile strength of concrete decreases with the increase of moisture content, and the effect of moisture content is significant. The compressive strength and splitting tensile strength of saturated concrete are decreased by 36.35% and 32.36% compared with those of dry concrete. The mechanical properties of relatively lower strength grade concrete are more sensitive to moisture content. With the increase of moisture content, the peak strain of uniaxial compression and splitting tensile of concrete show a downward trend, and the slope of the rising section of uniaxial compression and splitting tensile stress-strain curve increases gradually.

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含水率对不同强度等级混凝土力学性能的影响试验研究

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