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謝李，嚴超群

（楊凌職業技術學院，陜西 楊凌 712100）

 

摘  要：為了提高改性橡膠透水混凝土老化壽命預測效果，構建改性橡膠透水混凝土老化壽命精準預測模型，制備不同改性劑含量的橡膠混凝土試件，并進行老化溫度循環實驗。引入威布爾分布，建立混凝土的密度函數與分布函數，并構建改性橡膠透水混凝土修正Coffin-Manson老化壽命模型，實現改性橡膠透水混凝土壽命預測。結果表明：不含改性劑混凝土的質量損失最大，而改性橡膠透水混凝土可以保持較高的有效孔隙率與相對動彈模量。通過該模型預測可知，不含改性劑的混凝土老化壽命更短，而4%改性劑的試件在凍融循環2267.2次后失效，即該試件的老化壽命為2267.2，其老化壽命最高，且該預測模型的預測可靠度高于0.8，可以精準預測老化壽命。

關鍵詞：改性橡膠；透水混凝土；老化壽命；精準預測；威布爾分布；模型構建

中圖分類號：TU528          

文獻標志碼：A           

文章編號：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

 

 

 

 

 

*基金項目：楊凌職業技術學院院內基金項目（ZK21-32）。

作者簡介：謝李（1982-），男，碩士，副教授，主要研究方向：道路與橋梁工程技術、道路建筑材料等。

收稿日期：2023-08-12