不锈钢渣掺量对碱矿渣-不锈钢渣砂浆抗裂性能的影响  

Effect of Stainless Steel Slag Content on Cracking Resistance of Alkali Slag-Stainless Steel Slag Mortar

作　　者：张华 傅大宝 王本俊 季韬[2] ZHANG Hua;FU Dabao;WANG Benjun;JI Tao(Fuzhou Planning Design and Research Institute,Fuzhou,Fujian 350003,China;College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]福州市规划设计研究院集团有限公司,福建福州350003 [2]福州大学土木工程学院,福建福州350108

出　　处：《河北工程大学学报（自然科学版）》2023年第2期71-76,共6页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金资助项目(51878179)。

摘　　要：将不锈钢渣应用于碱激发水泥,对其资源化利用起到了重要作用。采用氧化钙、碳酸钠和水玻璃作为复合激发剂,固定总碱当量为6%(即氧化钙+碳酸钠的碱当量为4%,水玻璃的碱当量为2%),研究不锈钢渣掺量(0%、10%、20%、30%和40%,即不锈钢渣与(矿渣+不锈钢渣)的质量比)对碱矿渣-不锈钢渣砂浆(ASLm)抗压强度、抗折强度、劈裂抗拉强度、内钢环应变、环向拉应力和抗裂性能的影响,并通过抗裂评价指标A_(cr)(t)来表征ASLm的抗裂性能。研究发现:随着不锈钢渣掺量从0%增加到40%时,ASLm的抗压强度、抗折强度、劈裂抗拉强度、内钢环应变和环向拉应力均降低,抗裂性能先提高后降低;当不锈钢渣掺量为30%时,ASLm的A_(cr)(t)最大,即抗裂性能最优。The use of stainless steel slag in alkali-activated cement plays an important role in its resource utilization.Calcium oxide,sodium carbonate and water glass are used as composite activators,and the total alkali equivalent is fixed at 6%(the alkali equivalent of calcium oxide and sodium carbonate is 4%,the alkali equivalent of water glass is 2%).The effect of stainless steel slag content(0%、10%、20%、30%and 40%,the effect of the mass ratio of stainless steel slag to the summation of slag and stainless steel slag)on the compressive strength,flexural strength,splitting tensile strength,strain of interior steel ring,circumferential tensile stress and cracking resistance of alkali-activated slag-stainless steel slag mortar(ASLm)is investigated,and the crack resistance of ASLm was characterized by crack resistance evaluation index A_(cr)(t).The study found that with the increase of stainless steel slag content from 0%to 40%,the compressive strength,flexural strength,splitting tensile strength,strain of interior steel ring and circumferential tensile stress decrease,while the cracking resistance first increases and then decreases.When the content of stainless steel slag is 30%,the A_(cr)(t)of ASLm reaches the largest,i.e.,the crack resistance is the best.

关 键 词：碱矿渣-不锈钢渣砂浆 不锈钢渣掺量 强度 抗裂评价指标 抗裂性能 

分 类 号：TU528[建筑科学—建筑技术科学]