Recently, a good news came from the China Construction Standardization Association. The highway technical sand high performance concrete technical specification (T/CECS:K50-30-2018), which was compiled by the Guizhou highway group, was issued and implemented in April 1, 2019, thereby promoting and standardizing the application of the machine-made sand high-performance concrete in highway engineering, and ensuring that the machine-made sand high-performance concrete meets the requirements of excellent quality and technology. It is advanced, safe, durable and economical and reasonable.
It is understood that, according to the relevant requirements of the China Construction Standardization Association and the relevant provisions of the standard management method, the compilation units including the highway group have extensively investigated and summarized the application experience of the domestic manufactured sand high-performance concrete in recent years, consulted relevant standards, codes and regulations at home and abroad, and consulted the relevant units, and verified the key technologies. On the basis of engineering application, the technical specification for high performance concrete of highway machine-made sand has been worked out. The main contents of the regulation include general principles, terms and symbols, basic provisions, technical properties of raw materials, mix proportion design, construction, quality inspection and acceptance, and appendix A the alkali activity test and inhibition technical measures of machine-made sand high-performance concrete aggregate, and appendix B sphere similarity test method.