2019 Volume 73 Issue 1 Pages 333-339
The hardened cement in which the silicate type surface penetrants has reacted increases the strength of the area. A method of estimating the reforming depth using the Vickers hardness test has been proposed using this property. In this paper, the Vickers hardness test was carried out in the depth direction from the mortar surface, with the variation of water cement ration and the amount of penetrants related to the reaction of the silicate type surface penetrants as the test factor. And we examined the tendency. In mortars with high water cement ratio, the increase in Vickers hardness was small. And the tendency for the effect to become small was shown. Also, as the amount of penetrants increased, the reforming depth increased. However, the reforming depth of the mortar tended to be influenced by the density of the mortar. In addition, no clear increase in Vickers hardness was observed depending on the amount of the silicate type surface penetrants. This is considered to be due to the limited pore diameter reformed by the application of the silicate type surface penetrants. It is considered that the silicate type surface penetrants penetrates into the mortar while penetrating into the large void and causing a reaction in the small void.
