近年,笔者工作的贵州交通基础设施建设速度不断加快,机制砂混凝土在交通基础建设中大规模使用,特别是在高速公路中用的C50、C55和C60机制砂混凝土的大规模应用在桥梁关键部位,如何确保机制砂高强混凝土符合质量合格、技术先进、安全可靠、经济合理是当前形式的要求,是一个现阶段急需解决的问题。 In recent years, I work to speed up the construction of transport infrastructure in Guizhou, the mechanism of sand in the transport infrastructure for large-scale use, especially in the highway with C50, C55 and C60 large-scale application of sand concrete in the key parts of the bridge How to ensure that the high performance concrete sand complies with the requirements of the current form in terms of quality, advanced technology, safety and reliability, and economic rationality is an urgent problem to be solved at this stage.