钢渣粉的胶凝性及其对水泥力学性能的影响  

Cementitious Property of Steel Slag Powder and Impact on Mechanical Property of Cement

作　　者：赵计辉[1] 张大旺[1] 赵世娇 王栋民[1] 

机构地区：[1]中国矿业大学(北京),北京100083

出　　处：《科学技术与工程》2015年第17期222-226,241,共6页Science Technology and Engineering

基　　金：高等学校博士学科点专项科研基金(20120023110011);中国矿业大学(北京)博士研究生拔尖创新人才培育基金(800015Z666)资助

摘　　要：钢渣粉作为辅助胶凝材料用于水泥混凝土领域中的潜力很大,研究了钢渣粉自身的胶凝性及其粒径大小、掺入量对钢渣-水泥复合胶凝材料力学性能的影响。结果表明:钢渣粉的浆体强度和水化程度随其粒径减小而显著提高(28 d抗压强度4.0提高到21.5 MPa,Ca(OH)2含量从3.49%提高到5.48%,非蒸发水含量从4.8%提高到10.71%)。含30wt%钢渣粉的复合水泥3 d净浆和胶砂强度均表现出随微粉粒径的减小先增大,后降低(SC-40为拐点),而7 d、28 d强度随微粉粒径的减小而不断增大。钢渣粉的掺量对水泥浆体强度和水化程度的影响显著,水泥各龄期强度和水化程度均随钢渣粉掺量的增加而逐渐降低,且各龄期强度与钢渣粉含量均符合多项式函数关系。It has great potential that steel slag powder as the supplementary cementitious materials used in cement and concrete field. Cementitious property of steel slag powder and effect of its fineness and incorporation amount on the mechanical property of blended cement were studied. The results show that the strength and hydration degree of steel slag powder paste are significantly increased with reducing of particle size （28 d compressive strength is increased from 4.0 MPa to 21.5 MPa, the Ca（OH）2 content from 3.49% to 5.48%, and the nonevap- orable water content from 3.79% to 8.62% ）. The 3 d paste and mortar strength of blended cement containing 30wt% steel slag firstly increases, then decreases with reducing of particle size （SC-50 is the turning point） ; and 7 d, 28 d strength gradually increases with reducing of particle size. The effect of incorporation amount of steel slag powder in blended cement on the strength of blended cement is significant. All periods＇ strength and 28 d hydra- tion degree of blended cement gradually reduce with increasing of incorporation amount of steel slag, and all the re- lationships between each period＇ s strength of and incorporation amount of steel slag conform to the polynomial function relationship.

关 键 词：钢渣粉 胶凝性 水泥 强度 水化程度 

分 类 号：TU502.6[建筑科学—建筑技术科学]