再生混凝土冲击磨耗性能与调控方法
作者:
作者单位:

1.同济大学 土木工程学院, 上海 200092;2.广东省公路建设有限公司,广东 广州 510623;3.广深新塘立交改造项目管理处,广东 广州 510765

作者简介:

段珍华(1985—),男,河南商丘人,同济大学副教授,博士生导师,博士.E-mail: zhduan@tongji.edu.cn

通讯作者:

肖建庄(1968—),男,山东沂南人,同济大学教授,博士生导师,博士. E-mail: jzx@tongji.edu.cn

中图分类号:

TU528.59

基金项目:

国家自然科学基金资助项目(52178244,52078358)


Abrasion Resistance of Recycled Aggregate Concrete and Its Control Method
Author:
Affiliation:

1.College of Civil Engineering, Tongji University, Shanghai 200092, China;2.Guangdong Highway Construction Co., Ltd., Guangzhou 510623, China;3.Guangshen Xintang Interchange Reconstruction Project Management Office, Guangzhou 510765, China

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    摘要:

    评估了再生粗集料(RCA)取代率对再生混凝土(RAC)力学性能和冲击磨耗性能的影响规律,建立了RAC的冲击磨耗时变模型,并在此基础上开展了基于纤维和再生橡胶颗粒复掺的RAC冲击磨耗性能调控方法研究.结果表明:RAC的冲击磨耗性能随RCA取代率增大呈下降趋势,并与其各项力学性能指标之间具有较高的相关性;纤维和再生橡胶颗粒的掺入能够改善RAC的冲击磨耗性能.

    Abstract:

    Influence of the replacement rate of recycled coarse aggregate (RCA) on the mechanical properties and abrasion resistance of recycled aggregate concrete (RAC) was invesgated, and the corresponding time-varying model of abrasion rate was established. On this basis, the research on the adjustment and control method of the abrasion resistance of RAC based on the combination of fiber and recycled rubber particles was carried out. The results show that the abrasion resistance of RAC reduces with the increase of RCA replacement ratio, and has a high correlation with its corresponding mechanical properties. The addition of the fiber and RCA can improve the abrasion resistance of RAC.

    表 3 RAC的配合比Table 3 Mix proportions of RAC
    表 1 集料的基本性能Table 1 Basic properties of aggregates
    表 4 RAC冲击磨耗时变拟合曲线的参数Table 4 Parameters of abrasion resistance time-varying fitting curves of RAC
    图1 集料的级配曲线Fig.1 Gradation curves of aggregates
    图2 RCA取代率对RAC力学性能的影响Fig.2 Effect of R of RCA on mechanical properties of RAC
    图3 纤维种类对RAC力学性能的影响Fig.3 Effect of fiber type on mechanical properties of RAC
    图4 再生橡胶颗粒粒径对RAC力学性能的影响Fig.4 Effect of recycled rubber particles size on mechanical properties of RAC
    图5 经历不同旋转次数后RAC的破坏形貌Fig.5 Failure morphologies of RAC at different revolutions
    图6 RCA取代率对RAC冲击磨耗时变曲线的影响Fig.6 Effect of R of RCA on abrasion resistance time-varying curves of RAC
    图7 RAC磨损率与力学性能的相关性Fig.7 Correlation between abrasion rate and mechanical properties of RAC
    图8 纤维种类对RAC磨耗时变曲线的影响Fig.8 Effect of fiber type on time-varying abrasion curve of RAC
    图9 再生橡胶颗粒粒径对RAC冲击磨耗性能的影响Fig.9 Effect of recycled rubber particle size on abrasion resistance of RAC
    表 2 纤维的物理性能Table 2 Physical properties of fibers
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段珍华,邓琪,肖建庄,刘春.再生混凝土冲击磨耗性能与调控方法[J].建筑材料学报,2022,25(11):1136-1142

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  • 收稿日期:2022-04-26
  • 最后修改日期:2022-07-13
  • 在线发布日期: 2022-11-30
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