透水混凝土配制与建筑室内外高差无障碍应用

The Pervious Concrete’s Preparation and Barrier-Free Applications for Building Elevation Difference of Inside and Outside

摘要: 以某医院项目为背景，开展透水混凝土配制及其应用研究。通过多种级配对比基础上，确定了最终达到有15%孔隙率的C25标号的透水混凝土，透水系数平均在2.0 mm/s以上，以满足医院公共场地对透水性和强度双重要求。针对建筑室内外高差与出入口无障碍矛盾，从建筑方案、透水材料的选择、结构设计做法、摊铺难点及技术方案、实际使用效果进行测试，实现了严格的强度与透水性相关的性能应用测试，验证了新型绿色材料透水混凝土的高透水性、结合并改进传统散水工艺提升项目整体品质的同时，具有一定的社会效益。

Abstract: In this paper, with a new hospital as the background, the pervious concrete preparation and its application were researched. Through analyzing the graduation for different level concrete, the grade C25 with 15% porosity eventually presented, the average permeable coefficient is more than 2.0 mm/s in order to meet the water permeability and strength requirements for the hospital public area. In view of the building elevation requirement difference between indoor and outdoor, which contradicted with inward and outward barrier-free passage, the construction scheme, the choice of pervious materials, structure design, paving construction difficulties and technical plan were discussed; the actual effect test was implemented strictly through strength and permeability. The results verified the new green material of the pervious concrete with high water permeability, can improve traditional water apron method, and upgrade the whole quality of the project with certain social efficiency.