摘要
通过改变纳米CaCO_(3)的不同掺入方式和掺量对钙基地聚合物进行改性,分析改性后钙基地聚合物的抗压强度和弹性模量,并采用扫描电镜(SEM)揭示纳米CaCO_(3)对钙基地聚合物力学性能及微观结构的影响。结果表明:适量的纳米CaCO_(3)可以提高钙基地聚合物7 d和28 d的抗压强度和弹性模量。两种掺入方式的纳米CaCO_(3)最佳掺量均为胶凝材料粉体总质量的2%,且纳米CaCO_(3)作为添加物时改性效果更佳;纳米CaCO_(3)能有效促进凝胶的生成,影响凝胶的生长方式并改善钙基地聚合物的微观结构,使体系更为致密,结构更空间化,增强钙基地聚合物的力学性能。
Calcium-based polymers was modified by changing adding ways and contents of nano-CaCO_(3).Compressive strength and elastic modulus of the modified calcium-based polymers were analyzed.Micro-morphology of the modified calcium-based polymers was observed by means of scanning electron microscope(SEM).Influence of nano-CaCO_(3)on mechanical properties and microstructure of calcium-based polymers was revealed.Results show that proper amount of nano-CaCO_(3)can improve compressive strength and elastic modulus of calcium-based polymers for 7 days and 28 days.Optimum amount of nano-CaCO_(3)is 2%of the cementitious material,while nano-CaCO_(3)is more effective as a direct additive than as admixture.Nano-CaCO_(3)can effectively promote the formation of gel and effect the growth of gel.Because nano-CaCO_(3)can also improve the microstructure of geopolymer,system is more compact,structure is more spatial and mechanical properties of geopolymer are enhanced.
作者
马彬
朱林伟
牛海华
黄启钦
MA Bin;ZHU Linwei;NIU Haihua;HUANG Qiqin(Guilin University of Electronic Science and Technology,Architecture and Traffic Engineering College,Guilin 541004,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2021年第4期590-595,共6页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(51468009)
广西高校中青年教师基础能力提升资助项目(2017KY0194)
广西科技基地和人才专项资助项目(AD19245143)。
