CAJ | 학술논문

SBS改性沥青防水卷材作为无保护层的屋面防水材料使用时，要经受自然老化。论文通过检测自然老化过程中两种聚酯胎SBS防水卷材的拉伸性能、耐热性和低温柔性等参数的变化，对SBS防水卷材的自然老化进行研究。结果表明：自然老化对型号相同，配方不同的SBS防水卷材影响规律基本一致，但影响程度不同。自然老化过程中，上表面沥青涂盖层在紫外线辐射作用下会变硬、粉化，因局部收缩等原因产生裂纹，并逐渐演变为裂缝。在自然老化初期，SBS防水卷材主要经历了内部含水率增加、内部含水率减少（浸水再烘干）以及冻融循环3个过程，这3个过程直接影响聚酯胎基的性能。
SBS개성력청방수권재작위무보호층적옥면방수재료사용시，요경수자연노화。논문통과검측자연노화과정중량충취지태SBS방수권재적랍신성능、내열성화저온유성등삼수적변화，대SBS방수권재적자연노화진행연구。결과표명：자연노화대형호상동，배방불동적SBS방수권재영향규률기본일치，단영향정도불동。자연노화과정중，상표면력청도개층재자외선복사작용하회변경、분화，인국부수축등원인산생렬문，병축점연변위렬봉。재자연노화초기，SBS방수권재주요경력료내부함수솔증가、내부함수솔감소（침수재홍간）이급동융순배3개과정，저3개과정직접영향취지태기적성능。
When SBS modified bituminous sheet materials were used as the roof waterproof material without protective layer,it was going to undergo natural aging. This paper studied natural aging of SBS sheet materials by testing the parameters changes of tensile properties,heat resistance and low temperature flexibility of two kinds of polyester base materials SBS sheet materials. The results showed that the influence law of natural aging on the SBS sheet materials which had same type and different formula was basically the same,but the influence degree was different. During natural aging process,the upper surface of the bituminous cover layer would become hard and powder in the ultraviolet light condition,and the cracks caused by local shrinkage evolved into fractures gradually. In the early natural aging,SBS sheet materials had experienced three processes,namely,the internal moisture content increased,the internal moisture content decreased (dry after soaking) and the freezing-thawing cycle,these three processes directly affected performance of polyester base materials.