摘要
以镍渣和粉煤灰等工业固体废渣为主要原料制备地聚合物,并对其韧性进行优化。考察了粉煤灰对镍渣基地聚合物抗压强度的影响,并通过力学性能测试和扫描电镜观察研究了聚丙烯纤维(PP纤维)对镍渣-粉煤灰基地聚合物韧性的作用。结果表明,粉煤灰的掺入有利于镍渣基地聚合物抗压强度的提高,50℃养护3d和7d时,粉煤灰掺量为50%的镍渣-粉煤灰基地聚合物的抗压强度分别比镍渣基地聚合物提高了120.3%和119.6%。PP纤维能有效改善镍渣-粉煤灰基地聚合物的韧性,当纤维掺量为1.6%时,50℃养护3d和7d的地聚合物比未掺纤维试样的抗折强度提高了12.5%和25.0%,抗冲击功提高了173.7%和190.5%。
Nickel slag and fly ash can be used to produce geopolymer and the optimization of the toughness was also studied. The influence of fly ash on the compressive strength of the geopolymer was investigated. The effect of PP fiber on the toughness of the geopolymer was studied by mechanical property test and Scanning Electron Microscope （SEM）. The results show that the incorporation of fly ash can improve the compressive strength of the geopolymers. The samples were cured at 50℃ for three days and seven days. When the content of fly ash is 50%, the compressive strength of geopolymers were increased by 120.3% and 119.6%. PP fiber can effectively improve the toughness of the nickel slag-fly ash based geopolymers. When the fiber content is 1.6%, samples were cured under the same conditions for three days and seven days, the flexural strength was improved by 12.5% and 25.0%, and the impact energy was increased by 173.7% and 190.5%.
出处
《混凝土与水泥制品》
2017年第3期47-49,54,共4页
China Concrete and Cement Products
基金
国家自然科学基金项目(51502259
51572234)
住房和城乡建设部科学技术项目(2015-K4-007)
江苏省"六大人才高峰"项目(2016-XCL-070)
江苏省生态建材与环保装备协同创新中心项目(GX2015305和CP201506)
关键词
镍渣
粉煤灰
地聚合物
纤维
增韧优化
Nickel slag
Fly ash
Geopolymer
Fiber
Toughening modification
