[1] Zhang Cong, Cao Mingli,. Mechanical properties of calcium carbonatewhisker-reinforced high-strength cement mortar [J]. Journal of Southeast University (English Edition), 2012, 28 (3): 331-336. [doi:10.3969/j.issn.1003-7985.2012.03.014]

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Mechanical properties of calcium carbonatewhisker-reinforced high-strength cement mortar()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

28

Issue:

2012 3

Page:

331-336

Research Field:

Chemistry and Chemical Engineering

Publishing date:

2012-09-30

Info

Title:

Mechanical properties of calcium carbonatewhisker-reinforced high-strength cement mortar

Author(s):

Zhang Cong;  Cao Mingli

Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China

Keywords:

high-strength mortar;  CaCO₃ whisker;  strengthen-ing;  toughening

PACS:

TQ172

DOI:

10.3969/j.issn.1003-7985.2012.03.014

Abstract:

In order to improve the brittleness of high-strength cement mortar, calcium carbonate(CaCO₃)whiskers are incorporated to strengthen and toughen the high-strength cement mortar. The compressive strength, flexural strength, split tensile strength and work of fracture are measured. Microstructures and micromechanical behaviors are investigated using scanning electron microscopy. The strengthening and toughening mechanisms and the efficiency of whisker-reinforced high-strength cement mortar are discussed. The results show that the addition of CaCO₃ whiskers brings positive effects on the high-strength cement mortar. The strengthening and toughening mechanisms are whisker-cement coalition debonding, whisker peeling, whisker impact breakage and whisker bridging. Crack deflection is one efficient mechanism, but it is hard to be achieved in high-strength cement mortar. And the interfacial bonding strength between whiskers and the cement mortar matrix should be appropriately weak to introduce more crack deflection mechanisms to strengthen and toughen the cement mortar efficiently.

References:

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[8] Cao M L, Yao H, Wang L J. Experimental study on CaCO(3)whisker-reinforced fiber cement mortar [J]. Key Engineering Materials, 2011, 477: 245-251.
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[10] Faber K T, Evans A G. Crack deflection processes—Ⅱ. Experiment[J]. Acta Metallurgica, 1983, 31(4): 577-584.

Memo

Memo:

Biographies: Zhang Cong(1988—), male, graduate;Cao Mingli(corresponding author), female, doctor, associate professor, caomingli3502@163.com.
Foundation item: The National Natural Science Foundation of China(No.51102035).
Citation: Zhang Cong, Cao Mingli. Mechanical properties of calcium carbonate whisker-reinforced high-strength cement mortar[J].Journal of Southeast University(English Edition), 2012, 28(3):331-336.[doi:10.3969/j.issn.1003-7985.2012.03.014]

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