摘要: |
为了分析水泥-锂渣浆体的水化程度,采用高温煅烧法测试各龄期的化学结合水,结果发现:水泥-锂渣浆体的化学结合水量随龄期的延长而增加,水化3 d和7 d时能达到水化90 d时的60%和80%。高温养护、碱激发、高温和碱激发均能提高锂渣复合水泥基材料早期的化学结合水量,最高可达3~4倍,提高的幅度依次为碱激发和高温养护>碱激发>高温养护>标准养护。高温和复合环境养护也能提高水泥的水化程度,1~28 d内,锂渣掺量在40%以内时,水泥水化程度相对指数(ψ值)均大于1;掺量为60%时,ψ值均小于1。综上,高温养护、碱激发、高温和碱激发均能提高锂渣和水泥的水化程度,高温和碱激发复合作用时较为显著。 |
关键词: 养护方式 水泥 锂渣 水化程度 |
DOI: |
分类号:TU528 |
基金项目:国家自然科学基金资助项目(51541909);贵州师范大学2016年博士科研启动项目(2016) |
|
Influences of different curing methods on cement-lithium slag slurry hydration degree |
WU Fufei1, GONG Jingwei2, DONG Shuangkuai1, CHEN Changli1, ZHAO Zhenhua1
|
1.School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang;2.College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi
|
Abstract: |
In order to analyze the hydration degree of the cement-lithium slag slurry, the chemically combined water is tested by high-temperature calcination at different ages. The testing results show that the chemically combined water of the cement-lithium slag slurry increases with prolongation of the age that can be able to achieve more than 60% and 80% for 90 d at 3 d and 7 d hydration degree, after then this increase becomes slower. The chemically combined water at 1 d is up to 3 to 4 times under the conditions of high temperature curing, alkali activation, high temperature and alkali activation (composite curing), which is better than standard curing. Relatively speaking, the effect of the 4 kinds of curing is in the order of composite curing >alkali activation> high temperature curing>standard curing. The chemically combined water of unit cement at 1~28 d is small by an equivalent chemically combined water method, the relative index (ψ value) of the cement hydration degree at 1~28 d is greater than 1 when the content of the lithium slag is less than 40%, and ψ value is less than 1 when the content of the lithium slag is 60% under high temperature curing and composite curing. In summary, the hydration degree of the cement and lithium slag can be improved by high temperature curing, alkali-activation and composite curing, and it is more significant in the composite curing period. |
Key words: curing method cement lithium slag hydration degree |