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| 摘要: |
| 通过纤维轻骨料混凝土试件开放系统下的冻胀性能试验,研究了纤维轻骨料混凝土冻胀量的发育情况,分析了纤维轻骨料混凝土在冻结过程中温度变化特点及影响纤维轻骨料混凝土冻胀变化的原因.在模拟北方室外多次骤然降温后纤维轻骨料混凝土的性能后发现,纤维在轻骨料混凝土经历多次骤然降温后对冻胀有抑制作用,并确定纤维掺量为0.9 kg/m3时轻骨料混凝土抵抗骤然降温的能力较强;从微观角度探讨了冻结过程中纤维表面及纤维与浆体界面的黏结情况. |
| 关键词: 轻骨料纤维混凝土 冻融循环 开放系统 冻胀量 |
| DOI： |
| 分类号:TU528.572 |
| 基金项目:国家自然科学基金资助项目(10762002);;内蒙古自然科学基金资助项目(20080404ms0307);;内蒙古自治区高等学校科学研究重点项目(NJ09046) |
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| Heaving of Lightweight Aggregate Concrete in Open System |
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WANG Hai-long SHEN Xiang-dong
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| Abstract: |
| Natural pumice from the eastern Inner Mongolia was used as coarse aggregate for lightweight aggregate concrete.Through rapid freeze-thaw cycle experiment on lightweight aggregate concrete samples in an open system,the factors influencing heaving of the fiber reinforced concrete material were investigated and the characteristics of temperature change during freeze-thaw and the factors influencing heaving change of fiber reinforced concrete was analyzed.The freeze-thaw property subject to sudden temperature d... |
| Key words: lightweight aggregate fiber concrete freeze-thaw cycle open system displacement of heave |
