论文部分内容阅读
水泥混凝土路面以其承载力大、耐磨性好、抗滑性高、水稳热稳性强、使用寿命长、日常养护费用少和原材料丰富而被广泛应用于高速公路和城市道路中,但在使用中常出现错台、断板、开裂、拱起、脱皮、露骨等病害,严重影响混凝土路面的使用。一、病害的原因病害的原因是多方面的,有设计方面的原因,有材料方面的原因,也有施工和特殊气候造成的原因。 1.原材料①砂。施工中使用的砂过细、含泥量大、有机含量超标、砂率过高(超出38％)。②碎石。针片状多,压碎值超标,有机质含量大,含泥量大,粒径不规则。③水泥。水泥的安全性是水泥使用品质中最重要的指标,有的混凝土路面断裂、脱皮或由于体积膨胀导致
Cement concrete pavement is widely used in highways and urban roads due to its large bearing capacity, good abrasion resistance, high skid resistance, strong water and heat stability, long service life, low daily maintenance cost and rich raw materials In use often appear wrong Taiwan, broken board, cracking, arching, peeling, exposed and other diseases, seriously affecting the use of concrete pavement. First, the cause of disease Diseases due to many reasons, there are design reasons, there are material reasons, but also construction and special climate causes. 1. Raw materials ① sand. Sand used in the construction is too small, mud content, excessive organic content, sand rate is too high (more than 38%). Gravel More needle-shaped, crushing value exceeded, organic matter content, mud content, irregular particle size. ③ cement. The safety of cement is the most important indicator of the quality of cement used, some concrete pavement rupture, peeling or due to volume expansion