摘要
利用热重分析(TG)、扫描电子显微镜(SEM)和水化温度等测试手段分别研究了高磺化度三聚氰胺超塑化剂(SMF)对α半水石膏水化反应进程,硬化体微结构,标准稠度需水量和抗压强度等力学性能的影响.结果表明:SMF可以降低α半水石膏水化速率;SMF最佳掺量为0.4%,此时α半水石膏标准稠度需水量最高可以降低22.22%,硬化体抗压强度最高可以提高47.56%;SMF可以增加硬化体结构致密度,增大石膏晶体粒径,但也会增加体系内应力并破坏硬化体结晶网络.
Thermo gravimetric analyzer（TG）、scanning electron microscope（SEM）and hydration temperature test were used to research the effects of sulfonated melamine formaldehyde superplasticizer（SMF） on αhemihydrate gypsum in hydration process,microstructure of the hydration products,the water requirement at standard consistency and compressive strength. Results showed that it could decelerate the whole hydration process of α hemihydrate gypsum,the best dosage doped was 0.4%,the water requirement at standard consistency could be reduced by 22.22%at most and the compressive strength could be increased by 47.56%at most;SMF could give a more compact structure and increase the particle size of gypsum crystals ,it also could increase the internal stress and break the crystal network.
出处
《湖北大学学报（自然科学版）》
CAS
2015年第2期159-163,共5页
Journal of Hubei University：Natural Science
基金
国家高技术研究发展(863计划)(A2012AA06A111)资助
关键词
Α半水石膏
超塑化剂
水化进程
抗压强度
微结构
α hemihydrate gypsum
superplasticizer
hydration process
compressive strength
microtructure
