偏高岭土基地质聚合物的配合比及养护条件对其力学性及凝结时间的影响研究.docx

第 33 卷 第 11 期 硅 酸 盐 通 报 Vol． 33 No． 11 2014 年 11 月 BULLETIN OF THE CHINESE CEＲAMIC SOCIETY November，2014 偏高岭土基地质聚合物的配合比及养护条件对其力学 性能及凝结时间的影响研究 彭 晖1，2 ，李树霖1 ，蔡春声3 ，张雄飞4 ，崔 潮1 ( 1． 长沙理工大学土木与建筑学院，长沙 410114; 2． 长沙理工大学桥梁工程安全控制教育部重点实验室，长沙 410114; 3． 美国路易斯安那州立大学建筑与环境工程系，路易斯安那 70803; 4． 长沙理工大学化学与生物工程学院，长沙 410114) 摘要: 本文以煅烧得到的偏高岭土为原料，以氢氧化钠与水玻璃作为复合碱性激发剂制备地质聚合物，系统考察了 氢氧化钠、硅酸钠和水等组分含量的变化，对地质聚合物力学性能及凝结时间的影响; 以及在最优激发剂配合比的 选择下，不同的养护条件对于地聚物力学性能的影响。研究结果表明: 地聚物力学性能及凝结时间随氢氧化钠用 量增加先提高后降低; 且影响作用趋于一致。水的用量对地聚物的强度基本无影响，但对凝结时间影响较大。适 当提高养护温度可以提高地质聚合物的强度，适当延长养护时间可以提高地质聚合物的早期强度。 关键词: 地质聚合物; 力学性能; 凝结时间; 配合比; 养护条件 Study on Effect of Mix Study on Effect of Mix and Curing Conditions on the Mechanical Properties and Setting Time of Metakaolin-Based Geopolymer PENG Hui1，2 ，LI Shu-lin1 ，CAI Chun-sheng3 ，ZHANG Xiong-fei4 ，CUI Chao1 ( 1． School of Civil Engineering and Architecture，Changsha University of Science ＆ Technology，Changsha 410114，China; 2． Ministry of Education Key Laboratory of Safety Control of Bridge Engineering，Changsha University of Science ＆ Technology， Changsha 410114，China; 3． Department of Civil and Environmental Engineering，Louisiana State University，Louisiana 70803，USA; 4． School of chemical and biological engineering，Changsha University of Science ＆ Technology，Changsha 410114，China) Abstract: In this present paper，taking the calcined kaolin as the raw material，Geopolymer composites were prepared by Alkali composite activator which consists of sodium hydroxide and sodium silicate． By measuring the compressive strength and the setting time of geopolymer and by changing the content of each component in activator，the effects on the mechanical properties and setting time of metakaolin- based geopolymer have been systematically discussed． Besides，under the selection of the optimal ratio of activator，the effects of different curing conditions on the properties of geopolymers have also been studied． The results show that the amount of sodium hydroxide had the largest influence