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谢李，严超群

（杨凌职业技术学院，陕西 杨凌 712100）

 

摘  要：为了提高改性橡胶透水混凝土老化寿命预测效果，构建改性橡胶透水混凝土老化寿命精准预测模型，制备不同改性剂含量的橡胶混凝土试件，并进行老化温度循环实验。引入威布尔分布，建立混凝土的密度函数与分布函数，并构建改性橡胶透水混凝土修正Coffin-Manson老化寿命模型，实现改性橡胶透水混凝土寿命预测。结果表明：不含改性剂混凝土的质量损失最大，而改性橡胶透水混凝土可以保持较高的有效孔隙率与相对动弹模量。通过该模型预测可知，不含改性剂的混凝土老化寿命更短，而4%改性剂的试件在冻融循环2267.2次后失效，即该试件的老化寿命为2267.2，其老化寿命最高，且该预测模型的预测可靠度高于0.8，可以精准预测老化寿命。

关键词：改性橡胶；透水混凝土；老化寿命；精准预测；威布尔分布；模型构建

中图分类号：TU528          

文献标志码：A           

文章编号：1005-8249（2024）02-0011-06

DOI：10.19860/j.cnki.issn1005-8249.2024.02.003

 

XIE Li,YAN Chaoqun

（Yangling Vocational & Technical College, Yangling 712100, China）

 

Abstract: In order to improve the prediction effect of aging life of modified rubber pervious concrete, a precise prediction model of aging life of modified rubber pervious concrete was established. Rubber concrete specimens with different contents of modifiable agents were prepared, Aging temperature cycle experiments were carried out. Weibull distribution was introduced to construct density functions and distribution functions of concrete, and modified Coffin-Manson aging life model of modified rubber pervious concrete was constructed. The life prediction of modified rubber pervious concrete was realized. Experimental results show that the mass loss of concrete without modifier is the largest, while the modified rubber pervious concrete can maintain a higher effective porosity and relative dynamic modulus. It can be predicted by this model that the aging life of concrete without modifier is shorter, while the specimen with 4% modifier content fails after 2267.2 freeze-thaw cycles, that is, the aging life of this specimen is 2267.2, and its aging life is the highest. Moreover, the prediction reliability of this prediction model is higher than 0.8, which can accurately predict the aging life.

Keywords: modified rubber; pervious concrete; aging life; accurate prediction; weibull distribution; model building

 

 

 

 

 

*基金项目：杨凌职业技术学院院内基金项目（ZK21-32）。

作者简介：谢李（1982-），男，硕士，副教授，主要研究方向：道路与桥梁工程技术、道路建筑材料等。

收稿日期：2023-08-12