贵州山区缺乏河砂,过去用砂,都由广西或桂黔边境运来。1958年开始试用山砂配制混凝土,现已普遍用于工业和民用建筑中。经过多年实践尚未发现有重大问题。河砂来源不易,在贵州用山砂代替河砂可以就地取材,不但可以给国家节约建设资金,减轻运输负担,更主要的是加速了内地建设。 There is a lack of river sand in Guizhou’s mountainous areas. In the past, sand was used for transportation from Guangxi or Guilin borders. In 1958, the use of sand and sand for concrete preparation began. It has now been widely used in industrial and civil buildings. After many years of practice, no major problems have been discovered. The source of river sand is not easy. In Guizhou, mountain sand instead of river sand can be used locally. It can not only save construction funds for the country, but also reduce the transport burden, and more importantly, accelerate the construction of the interior.