骨料种类与级配对路面混凝土耐磨性能的影响

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (6): 1963-1972.

所属专题：水泥混凝土

骨料种类与级配对路面混凝土耐磨性能的影响

罗发胜¹, 李彬¹, 杜俊朋², 郭奕群², 麦俊明³, 张同生²

1.保利长大工程有限公司,广州 511430;
2.华南理工大学材料科学与工程学院,广州 510641;
3.广东省建筑材料研究院有限公司,广州 510145

收稿日期:2022-01-15 修订日期:2022-04-08 出版日期:2022-06-15 发布日期:2022-07-01
通信作者: 张同生,博士,研究员。E-mail:mstszhang@scut.edu.cn
作者简介:罗发胜(1983—),男,高级工程师。主要从事工程施工管理方向的研究。E-mail:287912465@qq.com
基金资助:
广东省水利科技创新项目(2016-23);广东特支计划科技创新青年拔尖人才(2015TQ01C312)

Effects of Type and Gradation of Aggregate on Wear Resistance of Road Concrete

LUO Fasheng¹, LI Bin¹, DU Junpeng², GUO Yiqun², MAI Junming³, ZHANG Tongsheng²

1. Poly Changda Engineering Co., Ltd., Guangzhou 511430, China;
2. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China;
3. Guangdong Institute of Building Materials Co., Ltd., Guangzhou 510145, China

Received:2022-01-15 Revised:2022-04-08 Online:2022-06-15 Published:2022-07-01

摘要/Abstract

摘要： 提高路面混凝土耐磨性能对行车安全和道路服役寿命具有重要意义。本文通过优化普通砂石骨料架构提高道路混凝土的耐磨性能,研究了机制粗骨料级配、细骨料种类与用量、胶凝材料用量及水胶比对路面混凝土力学性能与耐磨性能的影响。结果表明,16~31.5 mm碎石由质量分数25%增加到70%时,混凝土磨损量降低了29%。与河砂混凝土相比,机制砂混凝土磨损量降低58.3%,同时适当增加砂率可提高耐磨性能。降低胶凝材料用量和水胶比可在保证混凝土强度的同时进一步提高耐磨性(磨损量仅为(0.320±0.070) kg/m²)。机制骨料表面粗糙,棱角较多,与水泥浆体机械咬合力增强,有利于骨料嵌锁架构的形成,路面混凝土耐磨性能改善机制的提出为优化设计高耐磨路面混凝土提供了理论依据与技术支撑。

关键词: 道路混凝土, 骨料种类, 骨料级配, 力学性能, 耐磨性能, 嵌锁效应

Abstract: Improving the wear resistance of road concrete is beneficial to driving safety and road service life. In this study, the wear resistance of concrete was improved by optimizing particle packing of aggregate. The effects of coarse aggregate gradation, type of fine aggregate, sand ratio, amount of cementitious material, and water-to-cementitious material ratio on the mechanical properties and wear resistance of road concrete were investigated herein. The results show that the wear loss of concrete reduces by 29% when the mass fraction of coarse aggregate with diameter of 16~31.5 mm increases from 25% to 70%. The wear loss of concrete with manufactured sand reduces by 58.3% compared with that with river sand. Higher wear resistance of concrete is achieved by using higher sand ratio. Moreover, reducing the amount of cementitious material and water-to-cementitious material ratio rationally are effective ways to improve the strength and wear resistance of concrete (the abrasion loss is low as (0.320±0.070) kg/m²). The enhancement of bonding between manufactured aggregates and cement paste, which can be attributed to the rough surface and angular of manufactured aggregates, is beneficial to the formation of stable interlocking skeleton. The present investigation provides theoretical foundation and technical support for design and optimization of high wear resistance road concrete.

Key words: road concrete, aggregates type, aggregates gradation, mechanical property, wear resistance, interlocking skeleton

中图分类号:

TU528.37

罗发胜, 李彬, 杜俊朋, 郭奕群, 麦俊明, 张同生. 骨料种类与级配对路面混凝土耐磨性能的影响[J]. 硅酸盐通报, 2022, 41(6): 1963-1972.

LUO Fasheng, LI Bin, DU Junpeng, GUO Yiqun, MAI Junming, ZHANG Tongsheng. Effects of Type and Gradation of Aggregate on Wear Resistance of Road Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 1963-1972.

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骨料种类与级配对路面混凝土耐磨性能的影响

Effects of Type and Gradation of Aggregate on Wear Resistance of Road Concrete

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