摘要
本文采用双掺沥青和聚丙烯纤维对碱激发粉煤灰-矿渣基地质聚合物进行了强化增韧研究。结果表明当沥青及聚丙烯纤维掺量分别为1wt%和0.6wt%时,地质聚合物28 d龄期表现出9.7 MPa的最高抗折强度。XRD物相分析结果表明,双掺沥青和聚丙烯纤维对该地质聚合物的物相结构没有造成影响。SEM结合断裂韧度计算结果发现纤维与地质聚合物基体结合紧密,纤维的拔出长度较长,表明聚丙烯纤维可以提高试件的断裂韧度,达到增韧效果。
The double doped asphalt and polypropylene fiber were used to reinforce toughness of alkali activation of fly ash-slag based geopolymer.When the contents of asphalt and polypropylene fiber were 1wt% and 0.6wt%,respectively,the geopolymer showed the highest flexural strength of 9.7 MPa in curing time of 28 d.XRD results indicated that double doped asphalt and polypropylene fiber had no effect on the phase composition of the geopolymer.SEM combining with fracture toughness calculation results indicated that the fibers and geopolymer matrix linked closely each other.It was revealed that the fracture toughness of specimen can be improved due to longer pullout length of polypropylene fiber.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2013年第7期1432-1437,共6页
Bulletin of the Chinese Ceramic Society
基金
陕西省教育厅科研计划项目资助(12JK0579)
关键词
碱激发
粉煤灰-矿渣地质聚合物
沥青
聚丙烯纤维
抗折强度
alkali activation
fly ash and slag based geopolymer
asphalt
Polypropylene fiber
flexural strength
