掺和料对压蒸胶砂试件抗硫酸盐侵蚀性能研究  

Study on the Sulfate Corrosion Resistance of Mineral Admixtures on Steam-autoclaved Mortar

作　　者：张碧涛 胡延燕 杜永康 刘栋 Zhang Bitao;Hu Yanyan;Du Yongkang;Liu Dong(Shaanxi Building Materials Technology Group Co.,Ltd.,Xi’an,Shaanxi 710018;College of Materials Science and Engineering,Xi’an University of Architecture and Technology,Xi’an,Shaanxi 710055;Huangling Ecological Cement Co.,Ltd.,Yan’an,Shaanxi 727399)

机构地区：[1]陕西建材科技集团股份有限公司,陕西西安710018 [2]西安建筑科技大学材料科学与工程学院,陕西西安710055 [3]黄陵生态水泥有限公司,陕西延安727399

出　　处：《非金属矿》2024年第1期41-45,共5页Non-Metallic Mines

基　　金：西部绿色建筑国家重点试验室开放研究基金项目(LSKF201804);校基础研究基金(JC1705);横向项目(2023MHKJB-J-180)。

摘　　要：为研究压蒸养护下不同掺和料对胶砂试件抗硫酸盐侵蚀性的影响规律,采用石英粉、粉煤灰和矿粉为矿物掺和料制备压蒸胶砂试件,得到不同干湿循环次数下试件的抗压抗蚀系数,并对硫酸盐腐蚀前后胶砂试件的表观形态和微观形貌进行了分析。结果表明,与纯水泥试件相比,单掺20%石英粉对压蒸试件的抗硫酸盐侵蚀性降低幅度最大,240次干湿循环抗压抗蚀系数为0.53,单掺粉煤灰、矿粉或3种矿物掺和料两两双掺均有利于提高压蒸胶砂试件的抗硫酸侵蚀性。压汞试验表明,掺入矿物掺和料能有效改善压蒸胶砂试件的孔结构,但是单掺石英粉增加了大于0.02μm的有害孔含量,降低了压蒸胶砂试件抗硫酸盐侵蚀性。In order to study the influence of mineral admixtures on the sulfate corrosion resistance of autoclaved-curing mortar,the autoclaved mortar was prepared by quartz powder,fly ash and mineral powder,the compression and corrosion resistance coefficient was obtained under different number of dry-wet cycles.The appearance and microscopic morphology of the concrete after corrosion were analyzed.The results showed that compared with pure cement specimens,adding 20%quartz powder could reduce the sulfate resistance of specimen.After 240 dry-wet cycles,the compression and corrosion resistance coefficient reached 0.53.The single addition of fly ash,mineral powder,or three mineral admixtures in pairs could improve the sulfate resistance of autoclaved mortar.The mercury intrusion test showed that adding mineral admixtures could effectively improve the pore structure of autoclaved mortar,but adding quartz powder alone could increase the harmful pore(>0.2μm)content,which reduced the sulfate corrosion resistance of mortar.

关 键 词：矿物掺和料 压蒸 胶砂试件 抗硫酸盐侵蚀性 

分 类 号：TU528.31[建筑科学—建筑技术科学]