Although natural stone has noble, unique and unique value, it is also respected by people. However, in the natural environment, dust, waste gas, acid rain, freezing and other pollutants will cause fading, pollution and even damage to the stone used in buildings. In addition, improper decoration construction mode will also affect the decoration effect of stone materials due to human factors. What are the main pathological changes of stone? How should we deal with it? Now let's hear from Longmeida Stone Group:
Stone lesion I: rust
One reason for the rusting of stone is the result of natural reaction, and the other is the exposure to iron articles in the process of mining, processing, transportation and decoration. Because the iron material will be oxidized to produce ferric oxide (i.e. rust), the rust will seep out to the surface of the stone through the pores of the stone. For this reason, attention should be paid to prevent the stone from contacting with iron during a series of processes from mining to installation. If rust spots appear, rust remover should be used. The ideal rust remover should have two conditions: first, the stone material after rust removal will not regenerate rust; Secondly, it is required that the rust remover itself does not corrode the stone and does not affect the surface gloss of the stone. However, it should be noted that rust removers should not be used casually, especially when removing rust from natural marble, it is better to conduct an experiment first, and dilute with water if necessary. After rust removal, the stone shall be thoroughly cleaned with clean water, and then protected with protective agent to make the stone waterproof, so as to prevent the occurrence of other pathological changes and troubles caused by chemical corrosion in the future.
Stone disease II: wet mark is not dry
The main reason for the formation of wet marks is due to the influence of cement mortar in the wet construction method, because a small amount of trace elements contained in the cement components have a strong adsorption on water. When the ambient temperature is higher than 35 ° C in the humid atmosphere, a corrosive solution will be formed immediately. Crystalline water is often changed due to temperature changes, but it will never be deficient, which forms the phenomenon of wet marks. The prevention method is mainly to protect the stone material to make it waterproof, so as to prevent the water in the air from contacting the internal materials of the stone or cement and reduce its chemical reaction conditions; Secondly, cement construction and installation materials shall be avoided as far as possible; Finally, we should do a good job of joint filling and drainage.
Stone lesion III: salt crystallization
This phenomenon is mainly caused by the reaction between the strong alkaline cement and the acidic solution in the atmosphere. After the sodium carbonate solution seeps out of the pores of the stone to the surface of the stone, it immediately neutralizes with the moisture containing carbonic acid to form a salt solution. When the water in the solution dries up, it forms salt crystallization, which will appear in large areas when dissolved in water. For prevention, wet construction method shall be avoided as far as possible. Secondly, protective agent shall be used to make stone waterproof, and joint filling works shall be done well. The method to deal with salt crystallization problem is relatively simple. First, use a brush to brush off the white powder on the stone surface, then use a large amount of water to thoroughly clean the residue, and finally protect or polish the stone surface with a polishing agent with waterproof performance.
Stone lesion IV: lime erosion
This phenomenon comes from the fact that lime solution penetrates into the exterior wall surface and reacts quickly with carbon dioxide in the atmosphere to generate a substance that is not easy to hydrolyze and become a permanent coating. This phenomenon mainly occurs at stone joints. When dealing with lime erosion, first dissolve calcium carbonate with acid solution, then thoroughly clean the stone with water, and finally inject waterproof resin to prevent the lime solution from seeping out again.
Stone lesion V: frost damage
This kind of phenomenon is mainly caused by the freezing of the water absorbed by the pores and cracks in the stone. Because the volume expansion rate of the liquid water after freezing is about 10%, so a lot of pressure is generated on the stone to crack the stone. This phenomenon is more likely to occur on some porous stones. The preventive measure is to make the stone waterproof to reduce the water content inside the stone.
Stone pathological change VI: growth of bryophytes
The phenomenon that will lead to the growth of bryophytes mainly occurs in the parts with high water and organic content inside the stone, which will lead to the discoloration of the stone, reducing the strength and service life of the stone. The preventive measures should first do a good job of drainage to avoid ponding, and then apply protective agent to make the stone have good waterproof performance. The existing moss shall be removed with tools first, and then cleaned with professional cleaning agent. It is better to protect the stone, waterproof and improve the original drainage facilities.
Stone disease 7: chemical corrosion
Chemical corrosion is caused by the sudden increase of sulfur dioxide and sulfur trioxide in the air due to industrial waste gas and automobile exhaust gas. Dissolve in water to form an acidic solution, which can easily dissolve the materials in stone, causing chemical corrosion. Prevention is to make the stone waterproof before construction to prevent these harmful solutions from entering the stone.
Longmeida Stone Group, the hotel stone engineering expert and the first brand of Seiko stone, specializes in the production and processing of various natural stones and imported marble, and undertakes the supply of stone for hotel projects, government projects, leisure clubs, luxury villas and other projects. Demonstrate the noble value of natural stone and lead the healthy development of industry brands.
Create classics and inherit precious. Longmeida Stone Group has a large variety of natural stone materials, all of which are high-end imported materials. Welcome to visit the site and negotiate projects. The national unified consulting telephone is 4000-888-428, and the headquarters address is 8A, Zone 1, Building 2, Beifanshan Entrepreneurship Center, Panyu Avenue, Panyu District, Guangzhou, Guangdong Province. For factory address, please click "Longmeida Factory".