四大类外掺材料对聚合物改性水泥基材料性能影响的研究进展

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Abstract As a typical organic-inorganic composite, polymer-modified cement-based materials has the advantages of high strength, high toughness, good bonding performance and durability. It has been widely used and rapidly developed in the fields of structural repair, waterproof, anticorrosive, and road surface materials. In the future, polymer cement-based composite will be more widely used on the basis of the present, and will be developed relevantly under the promotion of meet application performance requirements and reduce costs.
At present, although polymer cement-based composite has been widely applied, there are still some problems to be solved. For example, if the polymer cement-based composite is modified by the polymer only, its overall properties are still insufficient. In the future, compound modification methods will gradually be more widely used. Compound modification by a variety of ways can make up for the shortage of merely polymer modification. For example, using the mineral admixtures, addition agent, fibers and nano-materials composited by polymer to modify cement-based materials is worthy of further research. Even by means of compound modification, the application range of polymer cement based materials will be further expanded.
Based on problems mentioned, researchers have further studied the influence of the aforementioned four materials on the properties of polymer cement-based materials. The results show that the polymer cement based materials modified by mineral admixtures can obtain better working performance, mechanical properties and durability, and significantly improve their microstructure. Adding various addition agent into polymer cement base materials can improve its working performance, strength and pore structure. Moreover, it can optimize the composition and structure of cementitious materials to some extent, so that the durability of polymer cement-based materials can be greatly improved. With the enhancement and toughening effect of fiber, the disadvantages of cement base materials modified with polymer merely, such as poor tensile strength, poor crack resistance and plastic dry shrinkage cracking can be overcome. Therefore, fiber and polymer used for compound modification of cement-based materials have excellent properties, which is one of the forefront and important directions in the development of cement-based materials. Adding nano materials into polymer cement-based materials can significantly improve its early hydration rate, promote polymer film formation, optimize pore structure and improve interfacial transition zone structure, thus further improving the strength and durability of polymer cement-based materials.
In this paper, the properties of polymer cement-based materials modified by mineral admixtures, addition agent, fibers and nano materials are reviewed, the shortcomings of the existing research are analyzed and the problems that need to be solved are put forward, thus providing more possibilities for the application of polymer cement-based materials in practical engineering.

Key words： polymer cement-based materials mineral admixtures addition agent fibers nano materials

Published: 16 July 2021

CLC number:

TU528

Fund:National Natural Science Foundation of China(51168031,51868044) and Open-ended Fund of State Key Laboratory of Silicate Building Materials (Wuhan University of Technology) (SYSJJ2018-20).

About author:: Kan Li, a doctoral candidate, has been studying for a Ph.D. degree of engineering in Lanzhou University of Technology since September 2017. She is mainly engaged in research of nano cement-based composites.Hongxia Qiao, is currently a professor, doctoral supervisor of Lanzhou University of Technology and Post-Doctoral of Qinghai Institute of Salt Lake, Chinese Academy of Sciences. She is mainly engaged in durability of concrete in recent years. She has participated in many international academic conferences at home and abroad, and published dozens of papers in domestic and foreign academic journals, among which more than 30 papers were included in SCI/EI.

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	LI Kan
	WEI Zhiqiang
	QIAO Hongxia
	LU Chenggong
	GUO Jian
	QIAO Guobin

Cite this article:

LI Kan,WEI Zhiqiang,QIAO Hongxia, et al. Research Progress of the Influence of Four Kinds of Admixtures on the Properties of Polymer Cement-based Materials[J]. Materials Reports, 2021, 35(Z1): 654-661.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2021/V35/IZ1/654

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