摘要
透水混凝土是一种具有良好透水性和透气性的多孔材料,广泛用于海绵城市以及生态护岸建设。随着中国建筑业进入高速发展阶段,每年产生数量庞大的建筑垃圾成为阻碍城市发展的一大弊端。将废弃的混凝土块经过破碎、分级等加工手段重新加工成为骨料颗粒后回收再利用,是解决建筑垃圾问题的有效途径。分析了骨料、水灰比和外加剂对透水混凝土力学性能和透水性能的影响,建立了孔隙率与透水混凝土力学性能关系,探讨了孔隙曲折度和骨料粒径分层与透水混凝土堵塞机理的关系,总结了水泥增强、骨料改性和ITZ黏接强度等参量提高透水混凝土冻融耐久性的机理,为再生骨料透水混凝土研究的提供理论依据。
Permeable concrete is a porous material with good water permeability and air permeability.It is widely used in sponge city and ecological revetment construction.At the same time,with the rapid development of China′s construction industry,a large amount of construction waste is produced every year,which has become a major disadvantage hindering urban development.It is an effective way to solve the problem of construction waste to reprocess the waste concrete blocks into aggregate particles and recycle them.The influences of aggregate,water-cement ratio and admixtures on mechanical properties and permeable properties of pervious concrete were analyzed,the relationship between porosity and mechanical properties of pervious concrete was established,and the relationship between pore curvature and the layering of aggregate particle size and the blocking mechanism of pervious concrete was discussed.The mechanism of improving the freeze-thaw durability of pervious concrete by cement strengthening,aggregate modification and ITZ bonding strength was summarized.It provides a theoretical basis for the research of recycled aggregate pervious concrete.
作者
范向前
史晨雨
FAN Xiangqian;SHI Chenyu(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210024,China;Cooperative Innovation Center for Water Safety&Hydro Science,Hohai University,Nanjing 210098,China)
出处
《混凝土》
CAS
北大核心
2023年第9期141-144,154,共5页
Concrete
基金
国家自然科学基金(51879168,52171270,51739008)
黄河水科学研究联合基金(U2243223)。
关键词
再生骨料
透水混凝土
堵塞机理
冻融耐久性
recycled aggregate
pervious concrete
plugging mechanism
freeze-thaw durability
