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Title: Water repellent treatment on surface of cracked concrete under seawater exposure environment
Authors: Zhang, P
Dai, JG 
Zhao, TJ
Wittmann, FH
Hartmann, S
Keywords: Cl- penetration
Hydrophobic layer
Surface water repellent treatment
Water absorption
Wet/dry cycles of seawater
Issue Date: 2009
Publisher: 中國學術期刊 (光盤版) 電子雜誌社
Source: 建筑材料学报 (Journal of building materials), 2009, v. 12, no. 2, p. 214-218 How to cite?
Journal: 建筑材料学报 (Journal of building materials) 
Abstract: Based on 770 seawater wet/dry cyclic exposure test, water repellent treatment(WRT) with use of four different types of silane was applied on the surface of cracked concrete to study the influence of WRT on water and Cl- penetration. Results show that for the concrete not cracked, WRT restrains penetration of water and Cl- into concrete effectively. If WRT is properly applied on cracked concrete surface even with the crack width of 0.2 mm, special silane treatment can still establish an effective Cl- barrier. While for concrete surface treated previously, when crack occurs again, the efficiency of WRT is highly sensitive to the magnitude of crack width. Therefore, it is necessary to evaluate carefully the state of cracks in concrete before applying silane-based surface water repellent treatment on reinforced concrete structures in order to ensure the efficiency of the treatment.
ISSN: 1007-9629
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