Study on the Influence of Recycled Building Aggregate on the Impermeability ofCity Wall Soil
LI Taihang, QI Chengzhi, WANG Xiaojiao, ZHOU Li'an
Beijing International Cooperation Base for Municipal Transportation Infrastructures and Beijing Future Urban Design High-Tech Innovation Center, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
Abstract: As an important part of Chinese architectural heritage, city walls have precious historical, cultural and artistic values. As part of the military defense line, walls and other auxiliary military installations constituted ancient military defense installations. The country advocates the preventive protection of architectural heritage. For preventive protection, it is necessary to understand the damage patterns and damage processes of the city walls under natural environmental conditions. At present, the preventive measures against the city walls under rainfall conditions are not perfect. This paper studies the permeability of the city wall, adding recycled brick aggregate and cement aggregate at 10%, 20%, 30%, and 40% of the mixed volume to the city wall soil, respectively. Through the orthogonal test design, combined with the triangular isenthalpic diagram, the optimal combination of modified soil permeability is obtained. Studies show that by incorporating recycled aggregate into the city wall soil, the impermeability of the city wall soil can be significantly improved to a certain extent. According to the triangular isenthalpic diagram, we can know that the optimal combination range of the permeability of the modified aggregate is 20%—30% for concrete aggregate and 10%—20% for brick aggregate.
李太行, 戚承志, 王晓娇, 周理安. 再生建筑骨料添加对城墙土体抗渗性的影响[J]. 材料导报, 2020, 34(Z1): 220-223.
LI Taihang, QI Chengzhi, WANG Xiaojiao, ZHOU Li'an. Study on the Influence of Recycled Building Aggregate on the Impermeability ofCity Wall Soil. Materials Reports, 2020, 34(Z1): 220-223.
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2020, Vol. 34 
