Study on Microcrack Control of Concrete

Jie Zhou; Sheng Li Zhang

doi:10.4028/www.scientific.net/AMM.174-177.483

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 174-177Study on Microcrack Control of Concrete

Study on Microcrack Control of Concrete

Abstract:

Microcrack is the main factor that determines extension of cracks under chemical corrosion and stress in concrete. The microcrack was studied throw rapid chloride permeability method. The chloride permeability factor of six different concrete was tested to characterize total microcracks of the concrete. In order to make the conclusion of the test more reliable, microscope was used to measure the chord length of the microcracks in the concrete, and the microcraks were classified according to the length. After that, all the chord length of different classes was summed up and calculated the correlation of microcrack length and chloride permeability factor. Results showed that microcracks longer than 500µm influenced the chloride permeability factor mostly. Water reducing agent, air entraining agent, polypropylene fiber, silicon ash and fly ash added in could control the expansion of microcracks, and polypropylene fiber had the most remarkable effect.

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Periodical:

Applied Mechanics and Materials (Volumes 174-177)

Pages:

483-487

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.174-177.483

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Online since:

May 2012

Authors:

Jie Zhou, Sheng Li Zhang

Keywords:

Chloride Permeability Factor, Chord Length, Concrete, Microcrack

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