Upgrading Mortar Durability By Surface Coating Layer Formation And Densification Using Electrodeposition Method

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Title: Upgrading Mortar Durability By Surface Coating Layer Formation And Densification Using Electrodeposition Method

Author(s): Jinxia Xu; Yalong Cao; Hongyou Shan; Li Tang; Yi Xu

Publication: Special Publication

Volume: 305

Issue:

Appears on pages(s): 23.1-23.8

Keywords: densification; electrodeposition method; mortar; silicate ion; surface coating layer formation

Date: 9/1/2015

Abstract:
A novel technique to upgrade the mortar durability by surface coating layer formation and densification using an electrodeposition method is suggested here. In this technique, the SiO32- ions as key raw materials are applied. Under the applied electric field, they are transported into the pores to react with Ca(OH)2 to promote the additional C-S-H gel formation, which induces the densification of mortar. Besides, the accelerated hydrolytic reaction of SiO32- ions, and the reaction of SiO32- ions in the outer electrolyte with the leached Ca2+ promote C-S-H/silica gel precipitation on the mortar surface. Furthermore, by a comparative experiment, it has been found that this technique can moderately increase the compressive strength and flexural strength of electrodeposited mortar sample. Also, the chloride diffusion into the electrodeposited mortar sample is notably decreased, which demonstrates the effectiveness of this electrodeposition technique in upgrading the durability.