耐火材料

耐火材料 ›› 2022, Vol. 56 ›› Issue (3): 247-250.DOI: 10.3969/j.issn.1001-1935.2022.03.015

• 生产应用 • 上一篇    下一篇

聚二甲基硅氧烷整体疏水改性铝酸钙水泥制品研究

李冰1)(), 张豪枫2), 郭育森3), 洪旭民3), 董宾宾3), 杨秀丽1)   

  1. 1)中钢洛耐科技股份有限公司 河南洛阳 471000
    2)洛阳耐研陶瓷纤维有限公司 河南洛阳 471023
    3)洛阳理工学院 河南洛阳 471023
  • 收稿日期:2021-08-01 出版日期:2022-06-15 发布日期:2022-06-24
  • 作者简介:李冰:男,1978年生,高级工程师。E-mail: zgnhlb78@163.com
  • 基金资助:
    河南省高等学校重点科研计划项目(22A430028);河南省科技攻关项目(222102230054);国家大学生创新创业训练计划项目(20211070001)

Entire hydrophobic modification of calcium aluminate cement products by polydimethylsiloxane

Li Bing1)(), Zhang Haofeng2), Guo Yusen3), Hong Xumin3), Dong Binbin3), Yang Xiuli1)   

  1. 1)Sinosteel Luonai Materials Technology Corporation,Luoyang 471000,Henan,China
  • Received:2021-08-01 Online:2022-06-15 Published:2022-06-24

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摘要：

为了提高铝酸钙水泥制品的疏水性,以铝酸钙水泥、聚二甲基硅氧烷、正硅酸乙酯、板状刚玉等为原料,研究了采用整体疏水改性时,疏水修饰剂聚二甲基硅氧烷加入量(分别为加水质量的0、1%、2%和5%)对铝酸钙水泥净浆凝结时间、净浆试样疏水性的影响,以及对刚玉浇注料试样的致密度、常温强度、疏水性能的影响。结果表明:1)随着疏水修饰剂聚二甲基硅氧烷加入量的增多,铝酸钙水泥净浆的初凝时间和终凝时间均有所延长。2)随着疏水修饰剂聚二甲基硅氧烷加入量的增多,浇注料试样的致密度缓慢减小,常温耐压强度和常温抗折强度显著减小;水接触角由113°增大至151°,疏水性能逐渐提高,且对酸、碱、沸水具有极高的稳定性。

关键词: 铝酸盐水泥, 疏水性, 凝结时间, 强度

Abstract:

To improve the hydrophobicity of calcium aluminate cement products,calcium aluminate cement paste samples and corundum castable samples were prepared with calcium aluminate cement,polydimethylsiloxane,tetraethoxysilane,tabular corundum,etc.as starting materials.The entire hydrophobic modification was adopted,and the effects of the addition of hydrophobic modifier polydimethylsiloxane (0,1%,2% and 5% of the water addition,by mass) on the setting time of calcium aluminate cement paste and the hydrophobicity of the paste samples,as well as on the density,the cold strength and the hydrophobicity of corundum castable samples were studied.The results show that:with the increase of the polydimethylsiloxane addition,the initial setting time and the final setting time of the calcium aluminate cement paste are prolonged;the density of the castable samples decreases slowly,the cold compressive strength and the cold modulus of rupture decrease significantly;the water contact angle increases from 113° to 151°,gradually improving the hydrophobic performance,and the samples have high stability to acid,alkali and boiling water.

Key words: aluminate cement, hydrophobicity, setting time, compressive strength

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