1.前言沥青作为一种传统的防水材料,具有良好的憎水性、不透水性、塑性和粘接性,是国内外普遍使用的廉价建筑防水材料,但它存在着低温脆化、高温流淌、弹性差及耐老化不良等缺陷。若通过选择合适的材料对其进行合理的改性,就可以收到扬长避短的效果。在国外改性沥青防水材料正逐步推广应用。如美国九十 1. Introduction As a traditional water-repellent material, asphalt has good water-repellency, impermeability, plasticity and adhesiveness. It is a cheap building waterproof material commonly used at home and abroad, but it has low-temperature embrittlement, high temperature flowing, Poor flexibility and poor resistance to aging and other defects. If by choosing the right material to its reasonable modification, you can receive results to avoid weaknesses. Modified asphalt waterproof material abroad is gradually popularized and applied. Such as the United States ninety