| Preparation of High Impermeable and Crack-resistance Chemical Admixture and Its Mechanism |
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| 引用本文： | 丁庆军 LULin-nu HUShu-guang HEYong-jia. Preparation of High Impermeable and Crack-resistance Chemical Admixture and Its Mechanism[J]. 武汉理工大学学报(材料科学英文版), 2002, 17(2): 70-73. DOI: 10.1007/BF02832627 |
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| 作者姓名： | 丁庆军 LULin-nu HUShu-guang HEYong-jia |
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| 作者单位： | [1]WuhanUniversityofTechnology [2]HubeiUniversity |
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| 基金项目： | Funded by Natural Science Foundation of Hubei Province (No.2000J027) |
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| 摘 要： | A kind of high impermeable and crack-resistance chemical admixture ( HICRCA ) was prepared, which is a compound chemical admixture composed of an expansion ingredient, density ingredient, and organic hydrophobic poreblocking ingredient. The results of the experiments indicate that the addition of HICRCA improves mortar and concrete in the following performances: ( 1 ) perfect workability: slump is more than 22cm, the slump after 3 h is about 16cm; (2) high impermeability.for the mortar, the pervious height under a water pressure of 1.5MPa is 1.5cm,for the concrete, the pervious height under a water pressure of 5.0MPa is 2.2cm; (3) high crack-resistance:there is a micro-expansion at the age of 9Od ; ( 4 ) high compressivestrength : compared with the controlled concrete, the compressive strengths at the age of 3d and 28d are improved by 66.4% and 62.0%, respectively. At the same time, the effects of different curing condigon on mortar and concrete expansive and shrinkage performance were studied. In addition, the impermeable and crack-resistance mechanism was investigated in the present paper.
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| 关 键 词： | 混凝土 压缩强度 裂缝防治 建筑物 |
| 收稿时间： | 2001-09-28 |
Preparation of high impermeable and crack-resistance chemical admixture and its mechanism |
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| Ding Qing-jun,Lu Lin-nu,Hu Shu-guang,He Yong-jia. Preparation of high impermeable and crack-resistance chemical admixture and its mechanism[J]. Journal of Wuhan University of Technology. Materials Science Edition, 2002, 17(2): 70-73. DOI: 10.1007/BF02832627 |
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| Authors: | Ding Qing-jun Lu Lin-nu Hu Shu-guang He Yong-jia |
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| Affiliation: | DING Qing-jun LU Lin-nu HU Shu-guang HE Yong-jia1) Wuhan University of Technology 2) Hubei University |
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| Abstract: | A kind of high impermeable and crack-resistance chemical admixture ( HICRCA) was prepared , which is a compound chemical admixture composed of an expansion ingredient, density ingredient, and organic hydrophobic poreblocking ingredient. The results of the experiments indicate that the addition of HICRCA improves mortar and concrete in the following performances: (1) perfect workability: slump is more than 22cm, theslump afar 3h is about 16cm; (2) high impermeability:for the mortar, the pervious height under a water pressure of 1.5MPa is 1.5cm,for the concrete, the pervious height under a water pressure of 5.0MPa is 2. 2cm;(3) high crack-resistance: there is a micro-expansion at the age of 90d; (4) high compressivestrength: compared with the controlled concrete, the compressive strengths at the age of 3d and 2Sd are improved by 66.4% and 62.0% , respectively. At the same time, the effects of different curing condition on mortar and concrete expansive andshrinkage performance were studied. In addition, the impermeable and crack-resistance mechanism, was investigatedin the present paper. |
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| Keywords: | concrete high impermeable and crack-resistance chemical admixture curing condition mechanism research |
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