The choice of protective chemicals for stone generally depends on two aspects: first, the quality of the stone itself; second, the scope and environment of the use of the stone.
The factors of stone itself generally include the hardness, density, water absorption, acid and alkali resistance, wear resistance, bending resistance, tensile strength, compression resistance and mechanical strength of the stone. This is the choice of water absorption, density and wear resistance. Factors that should be noted when using stone protectants.
The higher the water absorption rate, the worse the pollution resistance of the stone, the easier it is to be contaminated; the more easily the stone absorbs the pollution source. The water absorption rate is directly related to the density of the stone. The higher the density of the stone, the smaller its water absorption rate, and the better the protection; vice versa. The wear resistance index generally refers to the wear resistance ratio of the stone.
In the actual operation of stone decoration and decoration, the on-site personnel also summarized some simple and simple methods for checking the water absorption rate. If the water droplet test method is used: the water droplets are polished on the surface of the stone. If the water is absorbed in 1 min, it indicates that the water absorption rate of the stone is very high; if the water droplets are absorbed within 4 minutes, the water absorption rate of the stone is generally; if it exceeds 4 minutes, even Longer, the stone has a low water absorption rate. The amount of water absorption helps us choose the type of stone protectant and the process. However, the scientific selection of protective agents should be based on the first test – the calculation of the amount – do the small sample experiment – large-area construction procedures.
The water absorption rate is generally selected to be polished stone, and the water absorption rate of the uneven surface stone is not accurate.
In addition to considering the quality of the stone itself, the use of the stone should not be ignored. For example, if it is used on the stone of the bathroom, it should be considered acid and alkali resistant. In the kitchen, more oil and color resistance should be considered. In the public halls, the front hall of hotels and restaurants should be waterproof and wear resistant. – the osmotic protective agent.
Post time: Oct-18-2019