Experimental Study on Structural Characteristics and Interference Effects of Interface Transition Zone (ITZ) of the Cement-based Materials

doi:10.16046/j.cnki.issn2096-5680.2019.03.004

Journal of Hebei University of Water Resources and Electric Engineering ›› 2019, Vol. 29 ›› Issue (3): 26-33.DOI: 10.16046/j.cnki.issn2096-5680.2019.03.004

• Technology Theory and Application • Previous Articles Next Articles

Experimental Study on Structural Characteristics and Interference Effects of Interface Transition Zone (ITZ) of the Cement-based Materials

FAN Li-hui ¹,ZHAO Qing-guo¹,ZHANG Jun-wei ²,FAN Xing³

1.Hebei Provincial Communication and Planning Design Institute,050091,Shijiazhuang,Hebei,China;
2.Hebei Jiaotong Vocational and Technical College,050091,Shijiazhuang,Hebei,China;
3.Hebei LuHe Traffic Technology and Engineering Company,050091,Shijiazhuang,Hebei,China

Received:2019-04-16 Online:2019-09-30 Published:2019-10-31

水泥基材料界面过渡区（ITZ）结构属性与界面干扰的试验研究

樊丽辉¹，赵庆国¹，张君纬²，樊星³

1.河北省交通勘察设计研究院，河北省石家庄市桥西区振岗路120号 050091;
2.河北交通职业技术学院，河北省石家庄市珠江大道219号 050035;
3.河北路合交通科技有限公司，河北省石家庄市桥西区建国路661号 050051

作者简介:樊丽辉(1962-)，男，教授级高级工程师，主要研究方向:结构混凝土耐久性技术与防腐防护技术以及材料研究｡E-mail:flhui cn@163.com.
基金资助:
河北省交通厅科技计划项目“高速公路桥梁盐蚀碱蚀破坏病害分析及养护对策研究”（Y-090216）

Abstract

Abstract: In this paper,the latest research results with regard to the Interface Transition Zone(ITZ) of cement concrete in twenty years are summarized and induced,the forming mechanism of the ITZ and its developing characteristics are furtherly expounded,and three properties of the micro-products in the early period of hydration are put forward which are a first priority bigger crystallogeny(PBC),crystal adhered to large interface(CAI)and itself crystallizing extrapolation(CE).In view of the ITZ micro-environment,two mechanisms of surface energy interference and bond energy control are put forward to improve the properties of cement matrix composites.The concept of hydrogen bond energy and anti-hydrogen bond energy is first proposed to describe the interference mechanism for water molecular.The inhibition of the CH and AFt growth of large crystals and its implantation properties weakens its growth and generates more C-S-H gelatinous in time and space.In the experimental study,the non-polar group factors are used to modify the aggregate surface property by means of the polar of Si-O to form low surface potential energy and interference effects to block or eliminate the formation of the ITZ micro-environment.The experiment of cement mortar shows that the compressive strength of the specimen after 28days increases 67%after the interference,the shear strength increases 11%,and the water absorption decreases about 75%.According to the results of the interference experiment,new cognition about cement-based materials are put forward for several questions and concepts.

Key words: concrete, Interface Transition Zone(ITZ), structural characteristics, interference effects, experimental analysis

摘要： 总结与归纳了国内外近20年以来有关水泥混凝土界面过渡区(ITZ)的最新研究成果,并进一步阐述了ITZ形成机制与生成特点,提出了在水泥水化反应的早期微生成物具有大晶体优先(PBC)、大界面着床(CAI)与晶体外扩(CE)等三大属性。为了达到改善水泥基复合材料性能的目的,针对ITZ微环境,提出了表面能干扰和键能控制两大机理。首次提出了"氢键能"与"反氢键能"概念来阐述对水分子的干扰机理,通过抑制CH与AFt晶体优先生长与晶体着床属性,来削弱其生长发育,在空间和时间上使之有更多的C-S-H凝胶物质生成。研究试验中采用烷烃类非极性基团因子,并借助硅氧键Si-O,对集料表面进行修饰,形成低表面势能,使之产生干扰效应,从而实现阻滞或消除ITZ微环境的形成。通过对水泥砂浆试件的实验结果表明:干扰砂浆与普通砂浆相比,28d抗压强度提高了67%,28d抗折强度(替代法)提高了11%,干扰砂浆试件的吸水率降低了75%左右。根据干扰实验研究成果,对于水泥基材料的几个相关问题与概念提出了新的认识。

关键词: 水泥混凝土, 界面过渡区(ITZ), 结构特性, 干扰效应, 试验分析

CLC Number:

TU528

FAN Li-hui, ZHAO Qing-guo, ZHANG Jun-wei , FAN Xing. Experimental Study on Structural Characteristics and Interference Effects of Interface Transition Zone (ITZ) of the Cement-based Materials[J]. Journal of Hebei University of Water Resources and Electric Engineering, 2019, 29(3): 26-33.

樊丽辉, 赵庆国, 张君纬, 樊星. 水泥基材料界面过渡区（ITZ）结构属性与界面干扰的试验研究[J]. 河北水利电力学院学报, 2019, 29(3): 26-33.

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Experimental Study on Structural Characteristics and Interference Effects of Interface Transition Zone (ITZ) of the Cement-based Materials

水泥基材料界面过渡区（ITZ）结构属性与界面干扰的试验研究

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