| 复合矿物掺合料混凝土力学性能的试验研究 |
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| 引用本文： | 李懿卿,牛荻涛,宋华.复合矿物掺合料混凝土力学性能的试验研究[J].混凝土,2009(3). |
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| 作者姓名： | 李懿卿 牛荻涛 宋华 |
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| 作者单位： | 西安建筑科技大学,结构工程与抗震教育部重点实验室,陕西,西安,710055 |
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| 基金项目： | 国家自然科学基金重点项目，国家西部交通建设科技项目 |
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| 摘 要： | 对掺加不同矿物掺合料的混凝土在不同龄期下的力学性能进行了试验研究,研究了掺合料品种和掺量对混凝土力学性能的影响.试验结果表明:矿粉、粉煤灰和硅灰等矿物掺合料的掺人对混凝土性能有一定的影响,但其作用未必为正效应.在单掺情况下,矿渣和硅灰能有效地提高拌合物的黏聚性,从而改善混凝土强度,但对拌合物流动性有一定影响;掺加粉煤灰能有效提高混凝土的流动性,但产生泌水对拌合物匀质性有不良影响,而且由于粉煤灰的火山灰反应在常温下进行比较缓慢,因此混凝土早期强度较低.在双掺及三掺的情况下,复合矿物掺合料在混凝土中可发生火山灰复合效应、微集料复合效应等交互作用,混凝土强度较单掺有较大提高,由此得出复合矿物掺合料为配制优质混凝土的最佳途径.
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| 关 键 词： | 粉煤灰 矿渣 硅粉 混凝土 力学性能 |
Effect of multi-mineral admixtures on mechanics properties of concrete |
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| LI Yi-qing,NIU Di-tao,SONG Hua.Effect of multi-mineral admixtures on mechanics properties of concrete[J].Concrete,2009(3). |
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| Authors: | LI Yi-qing NIU Di-tao SONG Hua |
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| Affiliation: | Key Laboratory of Seismic and Structural Engineering of the Ministry of Education;Xi'an University of Architecture & Technology;Xi'an 710055;China |
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| Abstract: | The effect of different mineral admixtures is studied on the mechanics function of concrete.The effects of mineral admixtures including Fly Ash(FA),Blast-Furnace Slag(BFS)and Silica Fume(SF)on workable concrete were investigated.The results showed that both BS and SF can effectively improve the bonding of the mixtures,and then improve the concrete strength at both early and late age; however,both of them can affect the workability of the mixtures.FA can greatly improve the workability of the mixture;however... |
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