掺建筑垃圾水泥稳定碎石力学强度增长规律与预测模型
Mechanical Strength Growth Law and Prediction Model of Cement Stabilized Macadam with Construction Waste
张宇 1蒋应军 1范江涛 1许晓平 2俞晓松2
作者信息
- 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. 鸿翔环境科技股份有限公司,嘉兴 314400
- 折叠
摘要
本文研究了建筑垃圾再生集料掺量对水泥稳定碎石(CSM)力学强度的影响,以强度最高或掺量最大为原则提出了再生集料最佳掺量和配比,并在最优掺量下研究了再生集料水泥稳定碎石(CSMRA)的力学强度增长规律,提出了 CSRA力学强度的预测模型,并进行了可靠性验证.结果表明:CSRA抗压强度随再生细集料掺量增加先增大后减小,随再生粗集料掺量增加而降低,再生集料最大掺量为70％(质量分数);所建立的力学强度增长方程和预测模型的相关系数均大于0.98,预测值与实测值误差不大于14.0％,表明在确定水泥掺量、集料类型、矿料配比及7 d强度后,该模型可准确预测CSRA在其他养生龄期时的力学强度.
Abstract
The effect of dosage of recycled aggregate from construction waste on the mechanical strength of cement stabilized macadam(CSM)was investigated,the optimal dosage and proportion of recycled aggregate were proposed based on the principle of the highest strength or the maximum dosage.The growth law of mechanical strength of cement stabilized macadam recycled aggregate(CSMRA)was investigated under the optimal dosage,a prediction model of mechanical strength of CSMRA was proposed,and the reliability of prediction was verified.The results show that the compressive strength of CSMRA increases and then decreases with the increase of recycled fine aggregate dosage,decreases with the increase of recycled coarse aggregate dosage,and the maximum dosage of recycled aggregate is 70％(mass fraction).The correlation coefficient of established mechanical strength growth equation and prediction model is more than 0.98,and the error between predicted value and measured value is no more than 14.0％.This indicates that the model can accurately predict the mechanical strength of CSMRA at other ages after determining cement dosage,aggregate type,mineral proportion and 7 d strength.
关键词
建筑垃圾/水泥稳定碎石/力学强度/增长规律/预测模型Key words
construction waste/cement stabilized macadam/mechanical strength/growth law/prediction model引用本文复制引用
基金项目
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(300102213401)
出版年
2024
国家科技期刊平台
NSTL
万方数据