李虹橙 郑少鹏 李思李 侯子义

摘要 為了探究含盐陶粒对骨料碎石的替代给混凝土力学性能带来的影响，给含盐陶粒混凝土的设计施工提供理论依据，试验通过对不同替代率各组试件的抗压试验、抗折试验及耐磨性试验研究分析，得出如下结论：1）含盐陶粒混凝土的抗压强度随陶粒对骨料碎石的替代率增大而减小，当替代率为100%时，强度下降幅度达39.3%;2）根据含盐陶粒混凝土界面破坏形态和机理，证实陶粒与水泥石的界面黏结力比普通集料和水泥石的界面黏结力大，陶粒本身强度决定了混凝土的强度;3）当含盐陶粒的替代率小于等于70%时，混凝土的抗折强度大于4 MPa，可以满足各交通量等级条件下的规范设计抗弯拉强度要求;4）含盐陶粒混凝土的磨耗值随着含盐陶粒的替代率增大而增大，当陶粒对骨料碎石的替代率达到100%时，混凝土的磨耗值增长幅度为67%，各组试件的磨耗值均小于规范3.6 kg/m2的要求，证实了含盐陶粒混凝土能满足路面的耐磨性要求。

关 键 词 道路工程;含盐陶粒混凝土;室内试验;力学性能;耐磨性

中图分类号 U416.2     文献标志码 A

The influence of salt-containing ceramsite content on mechanical properties of cement concrete

LI Hongcheng1， ZHENG Shaopeng2，3， LI Sili4， HOU Ziyi1

（1. School of Civil Engineering and Transportation， Hebei University of Technology， Tianjin 300401， China; 2. Broadvision Engineering Consultants， Kunming， Yunnan 650041， China; 3. College of Civil Engineering， Chongqing Jiaotong University， Chongqing 400074， China; 4.The Ministry of Transport Highway Research Institute， Beijing 100088， China）

Abstract In order to explore the effect of salt-containing ceramsite to substitute the aggregate on the mechanical properties of cement concrete， and provide a theoretical basis for the design and construction of the salt-containing ceramsite concrete. By testing the different substitution rate on compression test and analysis of workpiece folding test and wear resistance test of resistance， we have the following conclusions： （1） The compressive strength of ceramsite concrete reduced when the salt-containing ceramsite substitution on the aggregate rate increased. When the substitution rate is 100%， the strength decrease reaches to 39.3%. （2）According to the interface failure form and mechanism of salt-containing concrete， which confirmed that the interfacial adhesion between ceramsite and cement paste is larger than that of aggregate and cement paste， and the strength of ceramsite itself determines the strength of concrete. （3） When the aggregate replacement rate is less than or equal to 70%， the flexural strength is more than 4 MPa， which can meet the requirements of standard design flexural tensile strength under various traffic grade conditions. （4） The wear value of salt ceramsite concrete increases with the increase of the replacement rate of salt-containing ceramsite. When the replacement rate of ceramsite to the aggregate reaches 100%， the wear rate of concrete increases by 67%. The wear value of each specimen is less than that of the standard 3.6 kg/m2， and it is proved that the salt-containing ceramsite concrete can meet the wear resistance requirements of pavement.

2.3 含盐陶粒对混凝土耐磨性的影响

耐磨性作为水泥混凝土重要的路用性能之一，路面磨光会导致轮胎与路面的附着力下降，对车辆的行驶安全造成不良影响，磨耗值过大则会影响路面的耐久性要求。为了探究含盐陶粒对混凝土耐磨性的影响，试验采取对各组试件做相同磨耗測试，与普通混凝土作对比，试验结果如图5所示。……