密实剂对水泥抗氯离子渗透性能的影响  

Study on the Effect of Compacting Agent on the Resistance of Cement to Chloride Ion Permeation

作　　者：丁向群[1] 杨宝鑫 王艺潼 段锦涛 DING Xiangqun;YANG Baoxin;WANG Yitong;DUAN Jintao(School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学材料科学与工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第4期731-737,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(52108235)。

摘　　要：目的研究密实剂对水泥抗氯离子渗透性能的影响。方法选择三种密实剂(S、Y、T),研究不同掺量下密实剂对水泥力学性能和抗氯离子渗透性能的影响,利用压汞测孔法分析内部孔隙结构,并利用扫描电子显微镜观察水泥的微观结构特征。结果当密实剂在单掺条件下,S掺量为0.02%,Y掺量为0.03%,T掺量为0.02%时,水泥3 d和28 d的抗压强度均得到改善,氯离子渗透性能与空白试样相比,28 d电通量分别降低了7.75%、9.44%、10.2%。密实剂的掺入能够使水泥水化更充分,并有效降低孔隙及裂缝的数量,改善水泥石结构的密实性。结论密实剂在低掺量下对水泥强度的发展有促进作用,可以降低水泥石的孔隙率,改善孔结构,并提高水泥抗氯离子渗透性能。To study the effect of compacting agent on the resistance of cement to chloride ion penetration.Three kinds of compacting agents(S,Y,T)were selected to study the influence of compacting agents on cement mechanical properties and chloride ion penetration resistance under different dosage.The pore structure was analyzed by mercury injection and scanning electron microscope.When the content of S is 0.02%,Y is 0.03%and T is 0.02%,the compressive strength of cement 3 d and 28 d is improved,and the electric flux of 28 d is reduced by 7.75%,9.44%and 10.2%,respectively,compared with the blank sample.The addition of the compacting agent can make the cement more hydrated,reduce the number of pores and cracks effectively,and improve the compactness of the cement stone structure.Compaction agent can promote the development of cement strength at low content,reduce the porosity of cement,improve the pore structure,and enhance the resistance of cement to chloride ion penetration.

关 键 词：密实剂 抗压强度 电通量 抗渗性能 孔隙率 

分 类 号：TU525[建筑科学—建筑技术科学]