聚羧酸超塑化剂对水泥土强度影响的试验分析  

Experimental analysis of the influence of polycarboxylate superplasticizer on the strength of cement soil

作　　者：陈三姗[1] 陈峰[1] CHEN Sanshan;CHEN Feng(College of Engineering,Fujian Jiangxia University,Fuzhou 350108)

机构地区：[1]福建江夏学院工程学院,福建福州350108

出　　处：《福建建筑》2021年第7期118-122,共5页Fujian Architecture & Construction

基　　金：福建省教育厅科技项目基金(JAT170611);福建江夏学院青年科研基金(JXZ2016005)。

摘　　要：为了探究聚羧酸超塑化剂对水泥土强度的影响,总结聚羧酸超塑化剂在土木工程领域的研究进展和应用现状,通过掺加与未掺加超塑化剂下水泥土的无侧限抗压强度试验,分析超塑化剂对水泥土强度的影响,然后通过扫描电镜试验,研究聚羧酸超塑化剂对水泥土微结构的形成过程和微结构的影响,从微观角度研究超塑化剂对水泥土的改性规律。电镜扫描结果显示:超塑化剂的掺加可以促进Ca(OH)_(2)和AFt晶体的形成,改变水化产物的形貌,提高水泥土的早期强度。In order to explore the influence of polycarboxylic acid superplasticizer on the strength of cement soil,the research progress and application status of polycarboxylic acid superplasticizers in civil engineering were summarized in this article.Through the unconfined compressive strength test of cement soil with and without superplasticizer,the effect of superplasticizer on cement soil was analyzed.Through scanning electron microscopy experiments,the effect of polycarboxylic acid superplasticizer on the formation process and microstructure of cement soil was studied.Then the modification law of superplasticizer on cement soil was discussed based on the Micro test.Scanning results of electron microscopy show that the addition of superplasticizer promotes the formation of Ca(OH)_(2) and AFt crystals,and changes the morphology of the hydration product,therefore,the early strength of cement soil has been improved.

关 键 词：水泥土 超塑化剂 强度 扫描电镜 

分 类 号：TU502[建筑科学—建筑技术科学]