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| 摘要: |
| 采用自行改进的水化热测定系统,研究了粉煤灰、矿渣粉和水胶比对超高强混凝土用低水胶比浆体水化热和水化进程的影响规律.结果表明:掺10%(质量分数,下同)粉煤灰或矿渣粉不影响低水胶比浆体的水化进程;掺30%,50%粉煤灰或矿渣粉均使低水胶比浆体的水化温升和水化放热速率峰值明显降低,并延缓这些峰值出现的时间,且粉煤灰对水化进程的延缓效果优于同等掺量的矿渣粉;提高水胶比只能略微推迟浆体的水化温升和水化放热速率峰值出现的时间,使水化放热速率峰值有所增大,不会改变浆体温升曲线和放热速率曲线的形状. |
| 关键词: 超高强混凝土 水化热 低水胶比 |
| DOI： |
| 分类号:TQ172.11 |
| 基金项目:国家重点基础研究发展计划(973计划)项目(2009CB623200) |
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| Research on the Hydration Heat of Paste in Ultra High Strength Concrete at Low Water-Binder Ratio |
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LIU Jian-zhong SUN Wei MIAO Chang-wen LIU Jia-ping
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| Abstract: |
| The effects of fly ash,ground granulated blast-furnace slag and water-binder ratio(m_w/m_b) on the hydration heat and the hydration exothermic process of paste in ultra high strength concrete at low m_w/m_b were investigated by the test system of hydration heat.According to the experimental results,the hydration exothermic process of paste,with the replacement level of 10% fly ash or slag,is similar to that of the control.However,with the increasing addition of fly ash or slag to 30% or more,the highest hyd... |
| Key words: ultra high strength concrete hydration heat low water to binder ratio |
