Abrasion Resistance and Rapid Chloride Permeability of Concrete Coated with Sodium Silicate Solution

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Publication Details

Author list: Thitipong Tuantong;Weerachart Tanchirapat;Chai Jaturapitakkul;Smith Songpiriyakij

Publication year: 2019

Journal: KMUTT Research and Development Journal (0125-278X)

Volume number: 42

Issue number: 1

Start page: 55

End page: 68

ISSN: 0125-278X

URL: https://digital.lib.kmutt.ac.th/journal/brows1.php?V_ID=37&N_ID=114

Abstract

This research aimed to improve the surface of concrete by coating with sodium silicate solution; by which the ratios of sodium silicate solution to water of 40:60 and 60:40 by weight were used. Concretes made from cement and fly ash at the water to binder ratios of 0.45, 0.55 and 0.65 were used as a substrate, while Portland cement was partially replaced by fly ash ata ratio of 25% by weight of binder. Coating was applied in two different cases:1) concrete was immediately coated with sodium silicate solution after being removed from the mold at 24 hours, then the specimen was cured at ambient temperature for 7 days before testing the abrasion resistance and 2) concrete was cured in water for 60 days before coating and curing at ambient temperature for 7 days for rapid chloride permeability testing. The results showed that the concrete coated with sodium silicate solution had higher abrasion and rapid chloride penetration resistance than the uncoated concrete, especially in the case of concrete prepared at the water to binder ratio of 0.65. The abrasion resistance improved by 64.5% and 69.9% when the ratios of sodium silicate solution to water of 40:60 and 60:40 were used, while the rapid chloride penetration resistance of the coated concrete improved by 30% at both ratios of the sodium silicate solution.

Keywords

การทาผิวหน้าคอนกรีต, ความต้านทานการขัดสี, ความต้านทานการซึมของคลอไรด์, สารละลายโซเดียมซิลิเกต