摘要
研究了复掺粉煤灰、矿渣、硅灰的多组分水泥基材料的水化放热行为。研究结果表明,与纯P·O42.5水泥水化放热行为不同的是,多组分水泥基水化体系的诱导期延长,加速期和减速期的出现推迟,并且明显降低各水化阶段的水化放热速率,第2放热峰的出现发生了明显的推迟;温度为303K时,多组分体系的第2放热峰可细化成2个小峰,分别对应于熟料和掺合料的水化;323K下由于温度作用,矿物掺合料和水泥熟料的水化速率差距减小,第2放热峰基本没有明显分化现象;矿物掺合料的种类和掺量对多组分体系水化放热行为有较大影响,尤其是掺加硅灰时,早期水化速率明显增加。
The hydration exothermic action of multi-component cement based materi als blending with fly ash, slag and volatilized silica was studied. The results showed that differing from pure P·O42.5 cement, the introduction interval of hy dration system of multi-component cement based materials was prolonged, and the rate of exothermic reaction during hydration of each stage was decreased obviou sly, and the appearance of the second exothermic peak was delayed obviously. Cor responding to the hydration of clinker and admixture respectively, the second ex othermic peak of multi-component system could be divided into two smaller peaks at 303K.At 323K, the difference of hydration velocity between mineral admixture and cement clinker was decreased, and the second exothermic peak had no obvious division. The amount and kinds of mineral admixture had an effect on the hydrati on exothermic action of multi-component cement based materials, especially as th e volatilized silica was added into it, the rate of the early time hydration inc reased considerably.
出处
《水泥》
CAS
2004年第9期1-3,共3页
Cement
基金
国家重点基础研究发展规划(973)项目(2001CB610704-2)
