北京建筑大学学报2026，Vol.42Issue(4)：70-78,9.DOI:10.19740/j.2096-9872.2026.04.08
基于防水黏结性能的再生砖粉砂浆外加剂调控化及纤维增强性能研究
Study on Admixture Regulation and Fiber-Reinforced Properties of Recycled Brick Powder Mortar Based on Waterproof and Bonding Performances
摘要
Abstract
To address issues such as material crumbling and reduced bond strength in the facade walls of historic-style buildings caused by the migration of moisture and soluble salts,this paper proposes a composite wall structure consisting of"masonry-waterproof bonding mortar-blue brick facing"as an effective solution.The waterproof bonding mortar is prepared using recycled brick powder as a partial cementitious material,blended with polymers and other components.An orthogonal experiment combined with the Analytic Hierarchy Process(AHP)was used to optimize the proportions of water-repellent agent,defoamer,and water-reducing agent,and the effects of polypropylene fiber length and dosage on the mortar's properties and microstructure were investigated.The results indicate that,in the recycled brick powder-silica fume-cement composite binder system,the optimal admixture combination is 0.2％water-repellent agent,0.6％defoamer,and 1.0％water-reducing agent.This combination effectively improves the mortar's tensile bond strength,reduces the water absorption rate to 4.5％,and simultaneously enhances particle dispersion and pore structure.Based on this optimal admixture combination,PP fibers primarily improve mortar performance by bridging microcracks and reducing pore connectivity.Among these,9-mm fibers exhibited superior overall performance at incorporation levels of 0.2％to 0.3％.When the incorporation level was 0.3％,the coating's impermeability pressure reached 2.6 MPa,representing an increase of approximately 24％compared to the control group without fiber addition.关键词
再生砖粉/防水黏结砂浆/层次分析法/聚丙烯纤维Key words
recycled brick powder/waterproof bonding mortar/analytic hierarchy process/polypropylene fiber分类
建筑与水利引用本文复制引用
周理安,赵晨妍,杨灿,陈晶晶..基于防水黏结性能的再生砖粉砂浆外加剂调控化及纤维增强性能研究[J].北京建筑大学学报,2026,42(4):70-78,9.基金项目
科技部国家重点研发计划项目(2022YFC3803403). （2022YFC3803403）
