Preparation and mechanical properties of polypropylene fiber reinforced calcined kaolin-fly ash based geopolymer

Zhang, Zuhua and Yao, Xiao and Zhu, Huajun and Hua, Sudong and Chen, Yue (2009) Preparation and mechanical properties of polypropylene fiber reinforced calcined kaolin-fly ash based geopolymer. Journal of Central South University of Technology, 16 (1). pp. 49-52. ISSN 1005-9784


To improve the environmental benefits and solve the problems of large shrinkage and high brittleness, the partial replacement of calcined kaolin by fly ash as a raw material for geopolymer synthesis and the influences of polypropylene (PP) fiber on the mechanical properties and volume stability were investigated. The results show that compressive strength of the geopolymer containing 33.3% (mass fraction) fly ash by steam curing at 80°C for 6d is improved by 35.5%. The 3-day compressive strength, flexural strength and impacting energy of geopolymers containing 0.05%PP fiber increase by 67.8%, 36.1% and 6.25%, while the shrinkage and modulus of compressibility decrease by 38.6% and 31.3%, respectively. The results of scanning electron microscopy (SEM) and the appearances of crack growths confirm that PP fiber can offer a bridging effect over the harmful pores and defects and change the expanding ways of cracks, resulting in a great improvement of strength and toughness.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2009 Central South University Press. Permanent restricted access to published version in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 31 Jul 2014 06:04
Last Modified: 16 Oct 2014 06:20
Uncontrolled Keywords: calcined kaolin; fly ash; geopolymer; mechanical properties; polypropylene fiber; preparation
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030305 Polymerisation Mechanisms
03 Chemical Sciences > 0302 Inorganic Chemistry > 030203 Inorganic Green Chemistry
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8698 Environmentally Sustainable Manufacturing > 869804 Management of Solid Waste from Manufacturing Activities
Identification Number or DOI: 10.1007/s11771-009-0008-4

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