Influence of Polycarboxylic-type Admixture on the Strength of Autoclaved Aerated Concrete  

作　　者：李敏 

机构地区：[1]Jiangsu Key Laboratory for Construction Materials, Southeast University, Nanjing 211189, China [2]International Institute for Urban System Engineering, Southeast University, Nanjing 211189, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2016年第6期1319-1322,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Fundamental Research Funds for the Central Universities(No.2242016K41003)

摘　　要：The influence of polycarboxylic-type admixture on the strength of autoclaved aerated concrete（AAC） was investigated. The flexural strength and compressive strength of AAC with polycarboxylic admixture（PA） were tested. The microstructure of AAC reinforced by PA was analyzed using scanning electron microscopic（SEM） methods. The crystal structure analysis of AAC with PA was also carried out using X-ray diffraction（XRD）. The results showed that the compressive strength and flexural strength of AAC were increased by 43.9% and 42.8%, respectively, when 1.5wt% of PA was mixed. In addition, the dosage of admixture influenced the reinforcing effect. Admixture affected pore structure and surface characteristic of the products in autoclaved curing process and improved the formation of high crystallite tobermorite which led to the enhancement of the compressive and flexural strength of AAC.The influence of polycarboxylic-type admixture on the strength of autoclaved aerated concrete（AAC） was investigated. The flexural strength and compressive strength of AAC with polycarboxylic admixture（PA） were tested. The microstructure of AAC reinforced by PA was analyzed using scanning electron microscopic（SEM） methods. The crystal structure analysis of AAC with PA was also carried out using X-ray diffraction（XRD）. The results showed that the compressive strength and flexural strength of AAC were increased by 43.9% and 42.8%, respectively, when 1.5wt% of PA was mixed. In addition, the dosage of admixture influenced the reinforcing effect. Admixture affected pore structure and surface characteristic of the products in autoclaved curing process and improved the formation of high crystallite tobermorite which led to the enhancement of the compressive and flexural strength of AAC.

关 键 词：autoclaved aerated concrete tobermorite polycarboxylic admixture strength 

分 类 号：TU528[建筑科学—建筑技术科学]