摘要
为了考察地聚物微观结构与强度的关系,在碱激发剂的作用下制备了硅铝比(结构单元中硅氧四面体与铝氧四面体的个数比)分别为1、1.2、1.5的粉煤灰基地聚物。测试了50°C恒温下养护7d时的抗压强度,并采用SEM、XRF、XRD对地聚物材料进行微观结构测试与分析。结果表明,Si/Al=1的地聚物材料强度最高,在其微观结构中粉煤灰玻璃体被反应层包裹的程度较小,且材料内部无定型物质的反应程度较好。研究揭示了,反应程度偏低是我国粉煤灰基地聚物强度低的主要原因。
In order to study the relationship between mirostructure and strength,geopolymers were prepared by Nantong fly ash under the action of alkali activator with silica alumina ratio of 1,1.2,1.5.The compressive strength of three kinds of geopolymers which were maintained at 50℃for seven days was investigated.The three samples were characterized by SEM and XRD to analysize the microscopic characterization.The results showed that the samples with low ratio of silica alumina had better compressive strength.Inside these low silica alumina materials,the vitreous body of fly ash was less wrapped by the reaction layer,and the reaction of amorphous material was better.The study revealed that the low reaction degree was the main reason for geopolymer based on fly ash in China.
作者
罗浩
刘鸣明
刘文白
侯东伟
张国平
邓益兵
Luo Hao1,2, Liu Mingming2, Liu Wenbai2, Hou Dongwei3, Zhang Guoping3,4, Deng Yibing2(1.Shanghai Pudong New Area Construction （Group） Co. ,Ltd. ,Shanghai 200136; 2.College of Ocean Science and Engineering, Shanghai Maritime University,Shanghai 201306; 3.School of Naval Architecture, Ocean ＆ Civil Ensineering,Shanghai Jiaotong University, Shanghai 200240; 4.Department of Civil ＆ Environmental Engineering, University of Massachusetts Amherst, USA 01003)
出处
《化工新型材料》
CAS
CSCD
北大核心
2018年第10期143-145,149,共4页
New Chemical Materials
基金
国家自然科学基金项目(51479113)
关键词
粉煤灰
地聚物
硅铝比
抗压强度
表征分析
fly ash
geopolymer
silica alumina ratio
compressive strength
characterization analysis
