矿渣、钢渣对水泥强度、孔结构和压蒸膨胀率的影响  

Effect of Blast Furnace Slag and Steel Slag on Mortar Strength,Pore Structure and Autoclave Expansion

作　　者：宋强[1,2] 胡亚茹[1,3] 李婷[1] 赵胜东[1] 

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055 [2]陕西循环经济工程技术院,西安710055 [3]陕西省低变质煤洁净利用重点实验室,榆林719000

出　　处：《硅酸盐通报》2015年第7期1762-1768,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家重点基础研究发展(973)计划(2012CB723302);陕西省自然科学基金(2012JM6006)

摘　　要：通过在硅酸盐水泥中加入不同掺量矿渣粉以及不同掺量和细度的钢渣粉,研究了矿渣和钢渣对水泥强度,孔结构和压蒸安定性的影响。实验结果表明:矿渣与熟料的比例是控制特定钢渣掺量的水泥28 d抗压强度的决定性因素,熟料和矿渣按照1∶1混和的水泥具有最高强度,影响水泥28 d最高抗折强度则是矿渣掺量。加入钢渣增大了水泥的孔隙率,而加入矿渣则可以减少试块孔隙率;矿渣能够明显细化浆体的孔结构,钢渣矿渣水泥的28 d抗压强度主要受到大于50 nm孔隙含量的影响。水泥压蒸膨胀率随着钢渣掺量增加而增加,矿渣能够显著改善钢渣水泥的压蒸安定性。Under different content of blast furnace slag and steel slag powder,cements were mixed to investigate the effect of dosage of these two mineral admixtures on strength,pore structure and autoclave expansion. The results indicated that the ratio of clinker content to ground granulated blast furnace slag（ GGBS） content is the crucial factor for compressive strength of mortars incorporated GGBS and steel slag powder at 28 d. With different dosage of steel slag,the compressive strength of 1∶ 1 mixes of clinker and GGBS has the maximum compressive strength. At 28 d,the critical factor which impacts the flexural strength is GGBS content. With the steel slag mixed in cement,the porosity of cement pastes was increased. With the GGBS mixed in cement,the porosity and pore size of cement pastes was decreased.Compressive strength of mortars was closely related to the content of pore in the sizes greater than 50 nm at 28 d. An increase of steel dosage causes a increase of the autoclave expansion of cement,and incorporating GGBS can decrease the autoclave expansion of steel slag cement.

关 键 词：矿渣 钢渣 孔分布 强度 压蒸膨胀 

分 类 号：TQ172[化学工程—水泥工业]