sand for building

基本解释

I am not surprised to learn that the building had fallen down, for it was built on sand.
听说那栋楼房倒塌了，我不惊讶；因为它的基础不牢固。
jsq51890803.blog.163.com
XL/XS Screw sand washer is mainly used for sand processing, electric pole factory, building work site and concrete dam, various sands classifying and dewatering.
XS洗砂机产品适用于建筑工地、砂石厂、混凝土大坝、玻璃厂石英砂及油井回填用压力砂的洗选、分级和脱水。
www.china-mining.cn
Using a gravel-sand mixture from channel bottoms as a building material for check dams allows use of readily available material and may also facilitate use of flood water.
用沟道内洪水冲积形成的砾砂混合料作为筑坝材料，既可以就地取材，又可以充分发挥土料透水性强的优势达到雨洪转化的目的。

This plant turns debris from buildings - many destroyed by Israeli air strikes - into sand and gravel that is then turned into cinder blocks for building.