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孙   杰1 , 王厚安1 ,  彭金龙1 , 廖海峰2

 

( 1. 武汉科技大学 城市建设学院 , 武汉   430065 ;

2.  中国市政工程中南设计研究总院有限公司 ,  武汉   430010)

摘  要 : 针对透水混凝土存在的力学性能低 、抗冻性能差等问题 ,  以粉煤灰和硅灰为掺杂相 ,  探究了不同掺量的粉煤灰和硅灰对透水再生混凝土力学性能的影响 , 并选取力学性能最优的透水再生混凝土在不同冻融介质中进行冻融循环试验 ,  以质量损失率和相对动弹性模量为依据 , 利用 Weibull 函数对透水再生混凝土进行寿命预测 。结果表明 : 适量的粉煤灰和硅灰能提高透水再生混凝土的力学性能 , 且粉煤灰掺量为 10% , 硅灰掺量为 6%时透水再生混凝土的性能最优 ; 5% NaCl 、5% Na2 SO4  均能加速透水再生混凝土的冻融破坏 ,  5% Na2 SO4  环境下的冻融破坏最严重 。建立的损伤预测模型能够精准的预测透水再生混凝土的使用寿命 ,  为透水再生混凝土在寒冷及盐渍地区的工程应用提供了理论依据。

关键词 : 透水再生混凝土 ; 力学性能 ; 冻融循环 ; 损伤度 ; 预测模型

中图分类号 : TU528           文献标志码 : A           文章编号 :  1005- 8249  (2026)  03-0007-06

DOI :10. 19860/j. cnki. issn1005- 8249. 2026. 03. 002

 

SUN Jie¹ , WANG Houan¹ , PENG Jinlong¹ , LIAO Haifeng²

( 1. School of Urban Construction , Wuhan University of Science and Technology , Wuhan 430065 , China;

2. Central &Southern China Municipal Engineering Design and Research

Institute Co. , Ltd. , Wuhan 430010 , China)

Abstract :  To address the inherrnt problems of low mechanical properties and poor frost resistance of pervious recycled concrete , fly ash and silica fume were adopted as admixtures.  The effects of different dosages of fly ash and silica fume on the mechanical properties  of  pervious  recycled   concrete  were  investigated.   The   pervious   recycled   concrete  with   the  optimal  mechanical performance was selected to conduct freeze-thaw cycle tests under different freeze-thaw media.  Based on the mass loss rate and relative dynamic elastic modulus , the Weibull function was employed to predict the service life of pervious recycled concrete. The results show that appropriate dosages of fly ash and silica fume can effectively improve the mechanical properties of pervious recycled concrete.  The  optimal  comprehensive  performance  is  observed  at a  10% the fly ash content and a 6%  silica fume content.  Both 5%  NaCl  solution and  5%  Na2 SO4   solution  can  accelerate  the  freeze - thaw  deterioration of  pervious recycled concrete , and the more severe freeze-thaw damage is under the 5% Na2 SO4  environment.  Furthermore , the established damage prediction model  can  accurately  predict the service life of  pervious recycled concrete ,   providing  a  theoretical basis for the engineering application of pervious recycled concrete in cold and saline regions.

Key words :  pervious recycled concrete ; mechanical properties ; freeze-thaw cycle ; damage degree ; prediction model