受地域条件的限制,郑州地区没有适宜的建筑用天然砂,尤其是配制预拌商品混凝土的中砂资源更是大量依靠信阳、鲁山地区车载运输。随着国家道路交通法规的完善,一些靠超载运输的方式已受限制。因此,郑州预拌商品混凝土企业就面临着一无本地资源,二靠运输无法保证供应的境地,所以, Due to the restriction of geographical conditions, there is no suitable natural sand for construction in Zhengzhou area. In particular, the sand resources for preparing ready-mixed commercial concrete rely heavily on vehicle transportation in Xinyang and Lushan areas. With the improvement of national road traffic regulations, some ways of overloading transportation have been limited. Therefore, Zhengzhou ready-mixed concrete enterprises are faced with no local resources, the second can not be guaranteed by the supply of the situation, therefore,