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1 国内外道路水泥发展状况 世界各国对发展高速公路十分重视,并以高速公路的多少作为一个国家经济发展程度的标志。在高速公路中,采用何种路面主要取决于材料来源的难易。如中东国家多数采用沥青混凝土路面;美国的高速公路有一半以上采用水泥混凝土路面;而日本的高速公路则有2/3是水泥混凝土修筑的。 我国随着公路等级的提高,修建水泥混凝土路面也已开始引起公路部门的重视。广东作为综合改革的试验区,在修筑大量的砂石路面、沥青路面的同时,也修筑一定数量
1 Road cement at home and abroad the development of countries in the world attaches great importance to the development of expressways, and the number of freeways as a sign of the extent of a country’s economic development. In the expressway, which pavement is mainly depends on the difficulty of the material source. For example, most countries in the Middle East use asphalt concrete pavement; more than half of the United States expressways use cement concrete pavement; and 2/3 of Japan’s expressways are constructed of concrete cement. With the improvement of the highway level in our country, the construction of cement concrete pavement has begun to arouse the attention of highway departments. Guangdong as a comprehensive reform pilot area, in the construction of a large number of gravel pavement, asphalt pavement, but also to build a certain number