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硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (8): 3045-3054.

• 道路材料 • 上一篇    下一篇

垂直振动成型CTB-50水泥稳定碎石抗压强度增长规律及预测模型

蒋应军1, 王煜鑫1, 周传荣1, 李明杰2, 杨明2, 蒋学猛3   

  1. 1.长安大学特殊地区公路工程教育部重点实验室,西安 710064;
    2.河南省交通基本建设质量检测站,郑州 450016;
    3.陕西省交通工程咨询有限公司,西安 710003
  • 收稿日期:2023-04-23 修订日期:2023-06-12 发布日期:2023-08-18
  • 通信作者: 王煜鑫,硕士研究生。E-mail:2021121195@chd.edu.cn
  • 作者简介:蒋应军(1975—),男,博士,教授。主要从事道路与铁道工程研究。E-mail:jyj@chd.edu.cn
  • 基金资助:
    陕西省创新能力支撑计划(2022TD-06);交通运输行业重点科技项目(2021-MS1-011);长安大学中央高校基本科研业务费专项资金资助(300102213401)

Compressive Strength Growth Law and Prediction Model for CTB-50 Cement-Stabilized Macadam Based on Vertical Vibration Compression

JIANG Yingjun1, WANG Yuxin1, ZHOU Chuanrong1, LI Mingjie2, YANG Ming2, JIANG Xuemeng3   

  1. 1. Key Laboratory of Highway Engineering in Special Region of Ministry of Education, Chang'an University, Xi'an 710064, China;
    2. Henan Province Traffic Infrastructure Quality Inspection Station, Zhengzhou 450016, China;
    3. Shaanxi Traffic Engineering Consulting Co., Ltd., Xi'an 710003, China
  • Received:2023-04-23 Revised:2023-06-12 Published:2023-08-18

摘要: 为表征最大粒径为53 mm水泥稳定碎石(CTB-50)的抗压强度,评价了垂直振动试验方法(VVTM)的可靠性,研究了水泥稳定碎石抗压强度随水泥掺量、龄期的增长规律,建立了抗压强度增长方程及预测模型,并分析了级配类型对抗压强度的影响。结果表明:VVTM试件抗压强度与试验段芯样相关性较高,可达91%左右;抗压强度随水泥掺量增加呈线性增大,在养护初期强度增长较快,60 d后强度趋于稳定;建立的抗压强度增长方程、预测模型与试验结果相关系数分别不小于0.982、0.976,预测值误差绝对值分别小于3%、6%;CTB-50的初始、极限抗压强度分别约为传统水泥稳定碎石(CTB-30)的1.25倍、1.09倍,相同的强度控制指标下,CTB-50可减少水泥用量,有利于降低工程造价,减少基层裂缝。

关键词: 路基工程, CTB-50水泥稳定碎石, 垂直振动试验方法(VVTM), 抗压强度, 增长方程, 预测模型

Abstract: In order to characterize the compressive strength of cement-stabilized macadam with a maximum particle size of 53 mm (CTB-50), the reliability of vertical vibration compression testing method (VVTM) was evaluated, and the growth law of cement-stabilized macadam compressive strength with cement dosage and age was studied. The growth equation and prediction model of compressive strength were established, and the influence of gradation type on compressive strength was analyzed. The results show that the compressive strength of VVTM specimens is highly correlated with the core samples of test section, up to about 91%. The compressive strength increases linearly with the increase of cement dosage. The strength increases rapidly at the initial curing stage and tends to be stable after 60 d. The correlation coefficients of established compressive strength growth equation and prediction model with test results are not less than 0.982 and 0.976, respectively, and the absolute values of predicted value errors are less than 3% and 6%, respectively. The initial and ultimate compressive strength of CTB-50 are about 1.25 times and 1.09 times that of conventional cement-stabilized macadam (CTB-30), respectively. With the same strength control index, CTB-50 can reduce the amount of cement, which is conducive to reducing the project cost and cracks of semi-rigid subgrade.

Key words: subgrade engineering, CTB-50 cement-stabilized macadam, vertical vibration testing method (VVTM), compressive strength, growth equation, prediction model

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