What are the common lesions of Egyptian beige and how to prevent them? (3)

3. Prevention of pathological changes

Through the above analysis of Egyptian beige stone, attention should be paid to the lesions that are prone to occur in the design, construction, and care processes of Egyptian beige stone, and corresponding preventive measures should be taken to minimize or avoid the occurrence of lesions.

3.1 Material selection: For humid and watery environments, or environments with frequent alternating hot and cold changes during the laying of underfloor heating pipelines, it is not suitable to use marble materials with suture structures. Instead, stone varieties with fewer sutures and relatively uniform structures should be selected.

3.2. Control of Salinity and Alkalinity: If the floor must be paved with stone with a suture structure, the amount of water used should be minimized as much as possible, especially for floors using ground heating methods. The stone paving should be carried out after the bottom cement is fully dried, and the moisture content of the stone bottom material should be strictly controlled.

3.3. Stone protection: Choose the correct stone protection agent to effectively reduce the water absorption rate of the stone; When using the wet bonding method to pave the ground, it is necessary to overlay the use of stone bottom protective agents that have a sealing effect and do not reduce the cement bonding force. Stone protection should be reasonable. The protection on the back of the stone is more important than the surface, and both hydrophobicity and sealing should be considered. Water-based protective agents should not be used on the front as much as possible, and solvent-based protective agents with good permeability should be used. When the surface protection layer reaches 3-5mm or more, it will greatly reduce the occurrence of stone lesions.

The requirements for protective agents on the ground using ground heating methods will be higher. When applying protective agents, it is necessary to try to make the protective agent penetrate into the deep layer of the stone as much as possible. The protective agent should be carefully prepared on both sides, and a double-layer approach must be adopted on the bottom surface. That is, after applying penetrating protective agents, a sealing-type special protective agent should be added to the bottom surface to minimize the capillary suction and precipitation crystallization of saline-alkali water.

4. Treatment of lesions

4.1. Strengthening treatment: The strengthening treatment of Egyptian beige stone is best done during the processing stage, and it is best to use the adhesive pressure infiltration method to allow the adhesive to penetrate into the sutures and micro-cracks of the stone, achieving a strong bonding effect. The stone produced in this way not only maintains the pattern of the stone itself but also strengthens the strength of the stone around the stitching line, making up for the weakness of this type of stone.

4.2. Glue repair and renovation: When there is debris collapse on the already laid ground, it is necessary to wait for the moisture in the bottom layer of the stone to fully dry and for the phenomenon of debris collapse to fully manifest before conducting renovation and resin glue filling treatment. When repairing with adhesive, attention should be paid to cleaning the surface of the broken debris, and there should be no pollutants, water, dust, etc. to avoid loose bonding and further broken debris; The modulation of resin adhesive should be targeted, taking into account both the bonding force and the hardness after curing, as well as the color. It is best not to use color powder to adjust the adhesive to avoid affecting the bonding effect. After renovation, it is necessary to wait for the stone to completely dry before implementing permeable protection, which will help to avoid further debris collapse in the future.

Similarly, before performing crystal hard care and grinding, it is also necessary to apply glue to the seam line depressions and debris. After grinding and leveling, crystal hard care should be performed to avoid linear depressions that may occur after crystal hard care.

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