海水海砂钢纤维混凝土的基本力学性能  

Basic Mechanical Properties of Seawater Sea-sand Steel Fiber Concrete

作　　者：苏红艳[1] 宋平新[2] SU Hong-yan;SONG Ping-xin(Hebi Polytechnic,458030;School of Physics and Engineering,Zhengzhou University,450001)

机构地区：[1]鹤壁职业技术学院,458030 [2]郑州大学物理工程学院,450001

出　　处：《混凝土与水泥制品》2020年第3期55-59,共5页China Concrete and Cement Products

基　　金：国家自然科学基金项目(51278235)。

摘　　要：制备了强度等级为C30、C50和C70的海水海砂钢纤维混凝土试件,通过180个标准立方体和72个棱柱体试件,完成了工作性、立方体抗压强度、轴心抗压强度、劈裂抗拉强度以及弹性模量试验,得到了基于两种规范模式下海水海砂钢纤维混凝土的弹性模量与立方体抗压强度的关系公式。结果表明,海水海砂能够配置成工作性良好的高强混凝土,钢纤维有利于提升混凝土拌合物的流动性。对于混凝土抗压强度、轴心抗压强度、劈裂抗拉强度和弹性模量四个指标,海水海砂混凝土均略低于普通混凝土,且随着混凝土强度等级的提高,差距逐渐减小,此外,随着钢纤维体积掺量的增加,上述指标值均逐渐增大。海水海砂混凝土的弹性模量与抗压强度关系模型与试验数据吻合较好,且具有一定安全储备,可供沿海、海岛土木加固工程借鉴。The seawater sea-sand steel fiber concrete specimens with expected strength of C30,C50 and C70 were prepared,and the tests of working performance,cubic compressive strength,axial compressive strength,splitting tensile strength and elastic modulus were completed through 180 pieces of standard cubes and 72 prism specimens,and the relationship between elastic modulus and cube compressive strength of seawater sea-sand steel fiber concrete based on two standard modes was obtained.The results show that seawater sea-sand can be configured into high-strength concrete with good workability,and the steel fiber is beneficial to improve the fluidity of concrete mixture.The four indexes of concrete compressive strength,axial compressive strength,splitting tensile strength and elastic modulus of seawater sea-sand concrete is slightly lower than those of ordinary concrete,and the gap gradually decreases with the increase of concrete strength grade,and with the increase of the volume fraction of steel fiber,the above index values gradually increase.The model of the relationship between the elastic modulus and compressive strength of seawater concrete has a high degree of agreement with the experimental data,and has a certain safety reserve,which can be used for reference to the coastal island civil engineering reinforcement project.

关 键 词：海水海砂混凝土 钢纤维 力学性能 弹性模量 

分 类 号：TU528.572[建筑科学—建筑技术科学]