| 氧化-醚化淀粉作水泥减水剂的制备及性能(二) |
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| 引用本文： | 王田堂,严云,胡志华,赵萍.氧化-醚化淀粉作水泥减水剂的制备及性能(二)[J].武汉理工大学学报,2011(1):60-63. |
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| 作者姓名： | 王田堂 严云 胡志华 赵萍 |
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| 作者单位： | 西南科技大学材料科学与工程学院;先进建筑材料四川省重点实验室;四川省非金属与功能材料重点实验室-省部共建国家重点实验室培育基地; |
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| 基金项目： | 国家科技攻关计划(2006BAF02A24); 校重点项目(07XJGZB02) |
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| 摘 要： | 考察氧化-醚化淀粉对水泥水化凝结时间影响,通过XRD、TAMair等温微热量热仪进行水化性能表征。结果表明:与萘系高效减水剂相比在掺量0.6%时减水作用优于萘系,流动度经30 min反而增加22.4%,2 h内基本无损失,但有明显缓凝作用,水化放热峰出现在75 h,但不影响后期水化,7 d时抗压强度已达国家标准,28 d时抗压强度比可达127%,可作为水泥的一种优良缓凝型高效减水剂使用。
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| 关 键 词： | 凝结时间 流动度 等温微热量热仪 缓凝型高效减水剂 |
Synthesis and Properties of Oxidized and Etherified Starch (OES) as a Kind of Dispersing Agents for Cement(Part Two) |
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| WANG Tian-tang,YAN Yun,HU Zhi-hua,ZHAO Ping.Synthesis and Properties of Oxidized and Etherified Starch (OES) as a Kind of Dispersing Agents for Cement(Part Two)[J].Journal of Wuhan University of Technology,2011(1):60-63. |
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| Authors: | WANG Tian-tang YAN Yun HU Zhi-hua ZHAO Ping |
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| Affiliation: | WANG Tian-tang1,YAN Yun1,2,3,HU Zhi-hua1,ZHAO Ping1(1.Department of Material Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China,2.Key Laboratory for Advanced Building Materials of Sichuan Province,3.State Key Laboratory Cultivation Baze for Nonmetal Compozite and Functional Materials,China) |
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| Abstract: | The impact of OES on the setting time of cement hydration was studied,and the property of OES was studied systematically by XRD and TAM air isothermal calorimetry.The results showed that compared with the naphthalene-based superplasticizers,the reduction capacity of OES was better with the same addition(0.6%),the fluidity was increased by 22.4% after 30 minutes and almost no fluidity variation with setting time in 2 hours.The OES superplasticizers can be used as the advanced set retarding and superplasticiz... |
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| Keywords: | setting time fluidity isothermal calorimetry set retarding and superplasticizer admixture |
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