09
Nov
Share
Comments Off on How to make anti-acid bricks and tiles دسته بندی نشده
How to make anti-acid bricks and tiles
Views: 10
In this article, we review how to implement anti-acid tiles as well as types of anti-acid mortars.
For many years, anti-acid ceramic linings or more completely anti-corrosion tiles and bricks have been used successfully to protect metal and concrete surfaces against corrosive materials.
Anti-acid ceramic linings, although introduced as a coating with high strength and capability, but have a major drawback and that is that due to the porosity of bricks and tiles as well as mortars, the possibility of transferring corrosive substances to the lower surface There is work. To solve this problem in anti-acid lining ceramic systems, a barrier layer (membranes) should be used under the brick and mortar, and this layer prevents corrosive materials from contacting the main structure.
Combining the anti-acid ceramic lining system with the inhibitory layer is called a composite anti-corrosion lining that has high chemical resistances while having the necessary resistance against mechanical and thermal stresses. The barrier layer must meet the following conditions:
It must be resistant to corrosive chemicals and prevent the penetration of materials and eventually reach the surface under work.
Resistant to thermal stresses as well as mechanical loads. The task of permanent and main thermal and mechanical resistance is the responsibility of tiles and bricks that are applied on the barrier layer.
The barrier layer must be free of pores and impermeable.
The barrier layer must have good adhesion to the surface under the work and at the same time to the mortars.
The barrier layer must be able to deform the plastic and elastic to be able to coordinate with the movements between the main structure and the anti-acid ceramic liner and ultimately neutralize the stress.
The barrier layer must be able to adapt to the surface below the work.
Anti-corrosion mortars
In general, mortars used in anti-acid structures, except those based on bitumen and sulfur (this type of mortar is no longer used), the rest in two-part or three-part forms. And are hardened by chemical reactions.
After mixing the mortar components, a chemical reaction begins. The speed of this chemical reaction, like all chemical reactions, depends on the temperature. The higher the temperature at the time of mortar application, the faster the reaction is completed and the sooner the mortar sets. Conversely, the lower the temperature, the later the mortar sets and the chemical reaction proceeds at a slower rate.
It should be noted that the operating temperature of the mortar has a minimum and a maximum that can not be combined and applied outside the mortar components.
Usually, in the executive instructions and technical specifications of mortars provided by mortar manufacturers, the operating time (pot life) as well as the setting time and reaching the mechanical and chemical resistance (curing) at a temperature of 20 or 25 degrees Celsius are specified. Is.
In many mortars, such as furan and phenolic bases, heat generation is required to achieve crosslinking to achieve crosslinking.
Mortars used in anti-acid buildings are divided into two groups: inorganic (mineral) and organic (polymeric).
Related posts :
Introduction of anti-acid mortars of Pasargad Refractory Materials Company
