The yellowing caused by the internal composition and structure of the marble occurs through external conditions. This external condition is the oxygen in water and air. Therefore, as long as water is effectively prevented from passing through the interior of the stone, the yellowing caused by the composition and structure of the stone will be effectively suppressed.
An effective means to prevent water from passing through the interior of the stone is to waterproof the back of the board before the stone is installed. The early waterproof treatment of stone slab backing was painted with siloxane/silane permeable waterproofing agent. Facts show that using this kind of waterproofing agent to paint the back of the board cannot effectively inhibit the occurrence of stone lesions including yellowing.
Permeable water repellent has a certain limit. No matter how good a waterproofing agent is, its waterproof performance will gradually decline due to environmental influences. This is why after the first application of the waterproofing agent, it must be repainted at regular intervals to repair the deterioration of its waterproof performance. For this reason, penetrating waterproofing agents are only suitable for boards that can be repainted at any time, such as the front of the floor or the wall facing outwards. When a penetrating water repellent is applied to the bottom of the board, the water repellent function of the water repellent cannot be monitored. Even if there are signs that the function of the waterproofing agent has declined, we cannot repaint it and repair it. We can only let it deteriorate and finally lose the waterproof function completely. This is the main reason why many projects use this floor installation process and still cannot avoid stone lesions.
A stone waterproof adhesive with cement as the base material and high molecular polymer emulsion came into being. This type of waterproof adhesive is called a two-component waterproof adhesive. One component is cement as the main body, with other inorganic fillers and a small amount of polymer additives, and the other component is organic polymer emulsion. This two-component waterproof adhesive must be mixed on site. Workers who lack professional knowledge often do not realize the importance of the proportion of the two components and do not mix in strict accordance with the specified proportion. Therefore, the quality cannot be fully guaranteed. In addition, there are many brands of this type of waterproof adhesive, and the quality is uneven. For example, if the polymer type in the emulsion is not properly selected or the solid content is too low, it is likely that it will not be waterproof.
This two-component waterproof adhesive is not suitable for white marble with high iron content or marble with more dark cracks, because when this waterproof adhesive is applied, the strong alkaline cement water will immediately enter the cracks of the stone. Or capillary pores and seep from the board surface, yellowing of the board surface may occur quickly.
The yellowing of white marble caused by external causes can be prevented through reasonable use and maintenance, such as placing a fiber carpet at the entrance to remove the sole sand or other hard particles before entering the marble paving area to reduce the impact of external hard particles. Wear of the stone surface. The mop used to clean the floor must be kept clean, and the water used for mopping the floor must be clean. After mopping the floor, wipe the water on the ground clean. Use dry wipes as much as possible and use less wet mopping. If possible, it is best to use marble cleaning fluid for maintenance.
Floor waxing has proven to be a method of maintaining marble slabs that does more harm than good. First of all, the gloss of the ground polished with wax does not last long. On the other hand, most of the wax blocks the ventilating pores of the stone, which hinders the normal gas passage of the marble that is adjusted with the weather. Finally, when the accumulated wax layer becomes yellow due to aging and needs to be removed, a wax remover must be used. The use of a wax remover will seriously affect the indoor air quality.
Crystal surface treatment is a commonly used polishing treatment for marble floors. Choosing the correct crystal surface agent can make the surface of the treated stone obtain a dense, bright film that does not affect the permeability of the stone. However, when processing the crystal surface, such as polishing with steel wool, the scattered steel wool powder must be vacuumed up. Any steel wool fine powder remaining on the ground may become a source of pollution for the yellowing of the board surface.
Practitioners of stone installation must have a certain professional foundation, understand the reasons for stone yellowing, have the necessary skills to install stone, keep the construction environment clean and tidy, and avoid yellowing of stone caused by installation. Scientifically care for the stone, avoid introducing iron that will make the stone yellow from the cleaning water or floor polishing process. Use good quality penetrating waterproofing agent to protect the floor regularly to reduce the time and opportunity of water and stone contact.
Therefore, effective prevention of yellowing of white marble should be a comprehensive measure. In the case that the cement floor or wall is not effectively waterproofed, the treatment of the back of the stone slab is particularly important. Choosing quality-guaranteed waterproof adhesive to waterproof the back of the board is the most important step in all measures.
