Study on Strength of EMDS-GBFS Composite Cement
Ground Blast Furnace Slag (GBFS) is widely used as a supplementary material in the composite cement due to its potential hydraulic properties. Electrolytic Manganese Dioxide Slag (EMDS) is an industrial waste rich in calcium sulfate, which can be used as a substitute for gypsum in cement production. Under alkaline hydraulic condition, the EMDS-GBFS composite cement can form Calcium-Silicate Hydrate (C-S-H). In this paper, the effects of mixture proportions of activators, proportion of clinker, fineness of compositions and water/cement ratio on the strength of the EMDS-GBFS composite cement were studied. The results showed that in EMDS-GBFS composite cement the applicable proportion of EMDS was 10-20%, Ca(OH)2 1-3%, GBFS 50% and clinker 30%. The compressive strength of the composite cement reached the ordinary Portland cement (PC42.5) mortars’ standard when the proportion of clinker exceeded 30%, and the flexural strength was higher than the ordinary Portland cement (PC42.5) mortars’ standard when the proportion of clinker exceeded 40%. The fineness of GBFS showed much greater impact on the strength properties than the clinkers fineness. The compressive strength and flexural strength of the composite cement decreased with the increase of water/cement ratio. The appropriate water/cement ratio was in the range of 0.45-0.55.
Qiang ZHANG Bing PENG Li-yuan CHAI Jia WANG Jin-long ZHANG
School of Metallurgical Science and Engineering, Central South University, Changsha, China
国际会议
The Fifth International Conference on Waste Management and Technology(第五届固体废物管理与技术国际会议)
北京
英文
121-124
2010-11-01（万方平台首次上网日期，不代表论文的发表时间）