摘要
针对青海盐湖地区特定的自然环境,以水(卤水)、水泥、膨胀剂、高效减水剂为原材料,成功配制出了具有高强度、高流动度、良好抗氯离子侵蚀能力的高强度水泥净浆。试验结果表明,在常温养护下,水灰比在0.32~0.4之间时,各组试件均可达到较高的抗折强度和抗压强度,而且具有良好的抗氯离子侵蚀能力,但采用卤水配制高强度水泥净浆时会引起流动度不佳。因此,采用卤水配制高强度水泥净浆时,需对水灰比范围进行适度调整,调整后的水泥净浆在28d后仍然能够使其抗折强度达到7MPa以上和抗压强度达到40MPa以上,且抗氯离子侵蚀能力基本不变。
High strength cement paste,which is made of bittern,cement,expanders and superplasticizer,has flexural strength,strong flowability and good capability of resistance to chloride ions penetration,to resist the special nature environment of salt lake region in Qinghai province. The experimental results show that under normal temperature curing,every group of sample can reach higher flexural strength and compressive strength and a better resistance capabilities to penetration of chloride ions when the water-cement ratio is at the range from 0. 32 to 0. 40; however,the fluidity is not well if the original water is replaced by bittern to make high strength cement paste. Therefore,the water-cement ratio range is suggested to adjust when using bittern to make high strength cement paste and it can also keep a high flexural strengths over7 MPa and compressive strengths over 40 MPa after 28 days of curing and the capabilities of resistance to chloride ions penetration would not change much.
出处
《建筑结构》
CSCD
北大核心
2017年第17期97-102,共6页
Building Structure
基金
国家自然科学基金资助项目(51408487)
中国住建部科学技术资助项目(2014-K2-037)
中国博士后科学基金第56批面上资助项目(2014M562437)
陕西省博士后科研项目资助
西安理工大学基础研究基金资助项目(118-211403)
关键词
高强度水泥净浆
氯离子渗透
卤水
水灰比
流动度
high strength cement paste
penetration of chloride ion
bittern
water cement ratio
flowability
