寒冬季节,许多低温期较长的城市,其柏油路面会出现严重的裂缝而遭损坏。鉴此,加拿大多伦多大学的塑料专家经多年研究,不久前发明了一种能避免由于热胀冷缩,使柏油路面受破损的科学新法。经试验,在沥青渣液中添加5％左右的聚乙烯有机物后, In winter, many cities with low temperatures have serious cracks in asphalt pavement and are damaged. In view of this, many years of research by plastics experts at the University of Toronto in Canada recently invented a new scientific method to avoid damage due to thermal expansion and contraction of asphalt pavement. After testing, adding about 5% polyethylene organic matter in the asphalt residue liquid,