Applied research of low-heat portland cement and F-N admixtures for RCC DAMS in Xizang Region

Abstract

At present, the cementing materials of RCC damming mostly use medium heat cement with high fly ash to reduce the internal temperature and achieve the purpose of temperature control and crack prevention. Xizang lacks high-quality admixtures such as fly ash and slags, but there are a large number of natural volcanic ash resources. If they can be used to partially or completely replace fly ash, the problem of fly ash shortage and high supply cost will be solved. The performance of RCC with different schemes, such as medium hot cement mixed with fly ash, low hot cement mixed with fly ash, mixed F-N and single N is studied The result show that the performance of RCC with low heat cement mixed with F-N admixtures meets the design requirements, long-term strength and frost resistance are better than the medium heat cement mixed with F.

Keywords

dam / roller compacted concrete / low heat cement / F-N admixture / fly ash