高分子减缩密实剂对水泥基材料性能影响研究
Research on the Effect of Polymer Shrinkage Reducing and Compacting Agents on the Properties of Cementitious Materials
方周 1余剑英2
作者信息
- 1. 迈嘉尔(武汉)高新技术发展有限公司,武汉 430070
- 2. 武汉理工大学材料科学与工程学院,武汉 430070
- 折叠
摘要
采用高分子减缩密实剂改善水泥基材料的性能,研究了高分子减缩密实剂对水泥基材料的抗渗性能、体积稳定性、抗开裂性能、抗硫酸盐侵烛、抗冻融循环的影响,并通过扫描电镜观察了 28 d龄期净浆水化产物的形貌.结果表明,相比于未掺组,掺入2％高分子减缩密实剂的水泥基材料,混凝土的28 d渗透高度比为27％,砂浆的渗透压力比达300％,混凝土 28 d氯离子迁移系数比下降至61％,混凝土的28 d收缩率比为87％,砂浆的早期抗开裂性能比可达76％,KS150次混凝土抗压强度耐蚀系数比提升至122％,混凝土抗冻等级达到F300,净浆水化产物形态得到优化,由疏松的团状结构转化为致密的簇状结构.
Abstract
The performance of cement-based materials was improved by using polymer shrinkage reducing and compac-ting agents.The effects of polymer shrinkage reducing and compacting agents on the impermeability,volume stability,crack resistance,sulfate corrosion resistance,and freeze-thaw cycle resistance of cement-based materials were studied.The morphology of the hydration products of the 28 day old net slurry was observed by scanning electron microscopy.The re-sults showed that compared to cement-based materials without the addition of 2％polymer shrinkage reducing compactor,the 28 day permeability height ratio of concrete was 27％,the permeability pressure ratio of mortar was 300％,the chlo-ride ion migration coefficient ratio of concrete decreased to 61％,the 28 day shrinkage ratio of concrete was 87％,the early crack resistance performance ratio of mortar could reach 76％,the compressive strength and corrosion resistance coeffi-cient ratio of KS150 concrete increased to 122％,and the frost resistance grade of concrete reached F300,The morphology of the hydration product of the purified slurry has been optimized,transforming from a loose cluster like structure to a dense cluster like structure.
关键词
高分子减缩密实剂/混凝土/抗裂防水/抗侵蚀Key words
polymer shrinkage reducing and compacting agent/concrete/anti crack and waterproof/anti erosion引用本文复制引用
出版年
2024
NETL
NSTL
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