A stone bond strength and stain resistance of ways to improve

Natural stone such as granite, marble due to the decorative and weather resistance, widely used in interior and exterior of the building, floor, etc. Construction of natural stone paving method commonly used cement mortar. But with cement mortar paving stone not only easy to pollution, and because of its bond strength fluctuations, unstable, causing the stone to fall off. To solve this technical problem, now stone bond strength and stain resistance method according to foreign literature Introduction to an improvement.

An improved method of
In natural stone surface and the side that is modified with a functional group mortar contact surface is coated with a composition containing reactive acrylated. This not only prevents pollution stone mortar, but also to improve the bond strength of stone and mortar.

Second, the test
Take three natural granite conduct bond strength and stain resistance test: a group of natural granite face and the side of Table 1 coated to a coating weight of modified acrylic acid, dried for 24 hours, another group of natural granite in stone surface side is coated with a sealant, dried for 24 hours; in another group of natural granite without any treatment. Test methods are as follows:

1, adhesive strength test
Evaluation of a planar tensile strength test.

2, stain resistance test
(1) resistance to weathering. Immersed in a 10% solution of sodium coast;
(2) resistant cement etching: Immersion in water and cement (2:10) dubbed the cement slurry;
(3) Resistance to red ink pollution: in red ink solution (10-fold dilution) in.