Loose marble on-site repair and refurbishment

Currently, the use of marble and granite building materials a lot of ground decoration, some marble, loose material, porosity and high water absorption, particularly in their daily walk around the ground wear, natural weathering and marble disease such circumstances, will result in raising board, explosion grain and other damage.

    General construction in the past, most have not been on the conservation treatment of marble, so soon after completion of various diseases occur, such as yellowing, efflorescence and so on.

    A few years ago, a company in Shanghai, to undertake a 28-story commercial building on the ground except yellow, repair, refurbishment. The marble building had contracted suppliers have asked us to deal with the ground. Check their site is: This building is almost entirely silver ground wire beige, board large pan base, a gray. Touch, feel granular substances.

    More than a year later, the building engineering department of corporate governance through advertising that marble disease, called and asked for treatment. To the scene they were surprised, only a year left and right, the original pan base has become a large area where yellow spot, the place has shown a serious brown. Explosive particle board, resulting in pits, large pieces such as nails, a small grain of rice, everywhere.

    At that time the construction sequence is: In addition to dealing with a polished one of macular hole repair a water conservation. Proved defective in that order. As the process is not correct, in each construction of a number of problems have occurred.

    1, in addition to macular treatment: they collected on the market of imported and domestic, and self-made syrup for several samples. marble confirmed the injury and can not place a pharmaceutical macula, followed by a large area of ​​construction, the cleaning can remove 97% of the macula. 3% still had no effect after repeated brushing. Can only seek the consent of the owners to take sample for laboratory analysis, preparation of targeted agents to be removed. Occurs because the disease can not be a cause, so in a different formation mechanism of pharmaceutical-related macular generated is impossible to process.

    2, grinding and polishing: polishing said under normal circumstances should be no problem. However, due to the plate through the corrosion, loose surface, the grinding process. One side polished. Board side of the explosive particles. The old holes were polished, and the new holes have appeared.

    3, hole repair: repair holes take longer, be patient. We used hot glue repair, not ideal, strength is not enough. Easy to fall off, when the soles of shoes through the dirt will stick to the glue on the formation of black spots. Fill with marble adhesive is not satisfactory, as after the first fill plastic polish, marble polishing plastic heat generated in the case of feeble fall: especially holes, if the first polished glue. Then can not afford to make the glue marks, and glue at the dull, resulting in scarring.

    4, water conservation: selection of water-soluble surface protectants, may be more operative than brushing, poor ventilation, not even after eight hours of drying, place the next day found a black sheet lined deepened, in some places become green. By observing the reasons are: water-soluble curing agent contains water, water in the gap if they can not quickly evaporate in contact with air oxidation to generate a new disease.

    The main reason for this failure: the board by corrosion, has become loose. So be on the plate reinforcement. Reinforcement material in the company discovered that some tests can be, but not ideal in the field test results. Analysis found that easy to deal with the company to do sheet and dry in the field even if the local heating drying board until the heat left, bottom and sides of the moisture will come in soon invaded, occupied the pores, so that reinforcement can not penetrate into the marble interior. This will, as a polishing agent reinforcement, like peeling the skin tear down, would not achieve the role of reinforcement. Construction at the site of a large area plates can be dried, so in the choice of reinforcing materials, must be selected hydrophilic, strong penetration, good polishing, strong bonding, without causing discoloration of marble materials.

    Based on the above revised construction sequence:

    1, with 50 mesh coarse Slate, first floor flat polished, the marble surface of the pores open;

    2, air dried in the air: as the ambient temperature. Ventilation at least 24 hours or more;

    3, infiltration of brushing solvent curing agent, water and hazardous substances blocking the bottom up, dry it after brushing;

    4, dilute the concentration of brushing reinforcement point of the first pass, let it penetrate into the gap. L2-hour coverage of plastic film to prevent solvent evaporation. Thicker coating was the second time, you can repair ~ b4, tL holes and small cracks, still covered with plastic film for 12 hours;

    5, patch holes: The strong bonding, polishing and good glue, with lust, first fill a large hole to fix a small hole, fed slightly higher than the board. Dry it thoroughly;

    6, 300 butterfly with a 100 # piece rubbed off a gel scar;

    7, with a 3ooo # ~ 500 # grinding;

    8, polishing:

    9, crystal face, or waxing to do maintenance;

    By the order of construction, the grinding plate is not critical in the grain, polished smooth as a mirror. Through a period of observation, macular no longer generated.