SBS改性沥青防水卷材在浸泡环境下的耐久性研究

Research on Durability of SBS Modified Bituminous Sheet Material in Soaking Environment

针对SBS改性沥青防水卷材在长期浸泡环境下的耐水性、耐酸性、耐碱性进行研究。结果表明:长期浸泡于水、酸、碱溶液,SBS改性沥青防水卷材仍具有较好的抗渗和低温性能;相同的SBS改性沥青防水卷材在不同的处理方式下,其拉伸性能的变化规律相似,接缝剥离强度变化规律基本一致;不同的SBS改性沥青防水卷材在同一处理方式下,其拉伸性能的变化规律略有区别,但大趋势一致,接缝剥离强度的变化规律基本一致;SBS改性沥青防水卷材的含水率对其力学性能有显著影响;在热熔施工质量过关且接缝未遭到外部因素破坏前,浸泡介质不会进入到接缝内部影响接缝质量,反而依靠接缝黏结面材料间的物理作用,接缝剥离强度有所增长。

The water resistance,acid resistance and alkali resistance of SBS modified bituminous sheet material in soaking environment are studied in this paper. The results show that SBS modified bituminous sheet material still has good impermeability and low temperature property by soaking in water,acid and alkali solution for a long time. Under different soaking methods,the change regulation in tensile property of same SBS modified bituminous sheet material is similar,and the change regulation of seam peeling strength is basically the same. Under same soaking methods,the change regulation in tensile property of different SBS modified bituminous sheet material is slightly different,but the trend is the same,and the change regulation of seam peeling strength is basically the same. The moisture content of SBS modified bituminous sheet material has a significant influence on the mechanical property. The soaking medium will not enter the seam and affect the quality of the seam before the seam is not destroyed by the external factors and the hot melt quality is passed. The seam peeling strength has increased relying on the physical effects of the materials between the adhesive surfaces.