电石渣增钙煅烧煤矸石制备少熟料水泥的研究

根据煤矸石的组成特点，加入早强剂研制了增钙煤矸石少熟料水泥，并对其物理及力学性能进行了系统的测试分析，研究结果表明：增钙煤矸石的最佳煅烧温度为1000℃，保温时间2h，K2SO4作为早强剂效果最好，其最佳掺入量为2％，通过实验确定了煤矸石少熟料水泥的配合比：增钙煤矸石：熟料：石膏：K28O4=60：34：4：2，由此配方得到的煤矸石少熟料水泥凝结时间正常，有良好的力学性质和安定性。

The research on low-clinker cement prepared by coal gangue of calcium calcined by carbide slag

According to the characteristics of coal gangue, low-clinker cement prepared by coal gangue of calcium is developed by adding hard- erring accelerator, the physical and mechanical property of which are tested and analyzed. The results show that the best calcination tempera- ture of coal gangue of calcium is 1 000 ℃, holding time 2 hours, K2SO4 as the best hardening accelerator and optimal doping amount of it 2%. The mixture proportion of low-clinker cement prepared by coal gangue is determined through experiment which is coal gangue of calcium ： clinker： plaster：K2SO4 = 60：34：4：2, and the low-clinker cement prepared by coal gangue gained by this recipe is of normal setting time, good mechanical properties and good stability.