| 摘要: |
| 用0.15～5.00mm废玻璃分别取代10%，30%，60%，100%（质量分数）天然砂和石灰石碎石来配制混凝土，测试混凝土试样300，400，600，900℃受热后的质量损失率、抗压强度和劈裂抗拉强度.结果表明：混凝土质量损失率随其受热温度的升高而增大；随着混凝土受热温度的不断升高，因混凝土内部缺陷增多和劣化不断加剧，混凝土强度不断降低；用废玻璃取代混凝土骨料有益于抑制混凝土内部的受热劣化，当废玻璃取代率为80%～100%时，对800～900℃受热混凝土的强度有较好的益化效果；废玻璃高温益化作用可以用混凝土强度保持率（P）、混凝土抗压强度保持率（Pc）受热温度（t）回归方程斜率和废玻璃高温益化系数（δ）指标来表征，其中废玻璃高温益化系数表征效果最好. |
| 关键词: 废玻璃 混凝土 高温 益化作用 强度 |
| DOI：10.3969/j.issn.1007 9629.2012.06.021 |
| 分类号: |
| 基金项目: |
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| Study on Enhancing Concrete Performance under High Temperatureby Using Waste Glass |
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KE Guo jun1, BAI Ji ping2, YANG Hui1, SONG Bai xing1
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1.School of Urban Construction, University of South China, Hengyang 421001, China;2.Faculty of Advanced Technology, University of Glamorgan, Pontypridd CF37 1 DL, UK
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| Abstract: |
| Concrete was made with 0.155.00mm waste glass replacement of natural sand and limestone crushed stone at levels of 10%, 30%, 60% and 100%（by mass）. Concrete specimens were tested for their mass loss rate, compressive strength and splitting tension strength at 300,400,600,900℃. The experimental results obtained show that mass loss rate increase with increase of temperature（t）. Concrete internal defects and degradation are developed with temperature increases, leading to concrete strength decrease. It is found that the replacement of concrete aggregate with waste glass hindered concrete degradation from high temperature effect, the enhancement effect of waste glass at high temperature increases with its replacement level, the optimal beneficial effect on concrete strength is achieved for concretes with 80%100% waste glass replacement at temperature 800900℃. The enhancement effect can be described and analyzed using keeping rate（P）of strength, gradient of regression equation for keeping rate（Pc）of compressive strength time（t） and high temperature enhancement coefficient（δ） of waste glass, and δ tends to be the best parameter. |
| Key words: waste glass concrete high temperature enhancement effect strength |
