Improved designed method of pervious concrete based on optimal volume ratio of paste to aggregate

作     者：BA Ming-fang QI Xin-yu ZHENG Yu-hang HUANG Guo-yang HE Zhi-min LIU Jun-zhe 巴明芳;齐新宇;郑宇航;黄国阳;贺智敏;柳俊哲

作者机构：School of Civil and Environmental EngineeringNingbo UniversityNingbo 315211China College of Civil Engineering and ArchitectureQingdao Agricultural UniversityQingdao 266109China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2021年第28卷第5期

页      面：1534-1545页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 

基　　金：Projects(51978346,51778302)supported by the National Natural Science Foundation of China Project(202002N3117)supported by the Ningbo Science and Technology Project,China 

主　　题：pervious concrete absolute volume method volume ratio of paste to aggregate mechanical properties porous structures permeability 

摘      要：An improved design method of pervious concrete was proposed to lower the deviation between the designed and actual porosity and maintain both mechanical property and permeability of pervious concrete. The improved design method is mainly based on the optimal volume ratio of paste to aggregate(VRPA), which was determined by testing the average thickness of cement paste coating aggregate. The performances of pervious concrete designed by the traditional method and the improved one were compared. The results show that with the increase of designed porosity, the reduction of compressive strength and flexural strength of pervious concrete designed by the improved method is significantly smaller than those designed by the traditional one. The maximum deviation between the designed and actual porosity of the pervious concrete by the improved method is only 1.54%, which is far less than 8.7% obtained by the traditional one. Micro-structural analysis shows that the porous distribution of pervious concrete designed by improved method exhibits better uniformity.