Analysis of the repair process after the empty stone

Empty drum is a common quality problem common in housing engineering. It means that the decoration surface layer (greed layer or tile) is not well treated with the base layer, and the combination is not tight, resulting in a void space between the base layer and the decoration surface layer. The hit will hear the sound of a drum, which is called "empty drum" in engineering. The empty drum is made by hammering the surface of the stone with a quality inspection tool, or gently tapping the surface of the stone to hear the sound of a drum, which is obviously different from the sound of a lightly scratched or lightly hit surface of the stone. The corners of the layer are rarely present in the middle of the stone surface. Some time ago, 365 China Stone Network introduced several major reasons for the generation of stone hollow drums, but there is no detailed introduction to how to solve them after the occurrence. This article is a brief introduction.

1 Remove the empty marble board and re-install it. It is troublesome to use this method, and the repair cost is large. More importantly, the new and old marble surface gloss and color pattern are difficult to be consistent after repair. 2 It adopts epoxy steel bolt anchoring method. After repairing, the veneer is firm and standing without damage, and the construction method is simple, saving labor and materials.

The main points of construction are: 1 drilling first. For the marble plate to be repaired, determine the position and quantity of the hole. First, drill the carbide insert Φ10 with an electric drill, drill it into the brick wall or concrete base 30mm, and drill the marble with the Φ12 drill at the drill hole. Into 5mm. It should be noted that the drill should be inclined at a downward angle of 15 degrees to prevent the epoxy resin slurry from flowing out of the hole after grouting. After the hole is drilled, the dust in the hole is removed by compressed air (pressure 6kg/cm2). The ash-eliminating mouth should be inserted into the bottom of the hole, so that the dust will escape from the hole with the compressed air.

2 Substituting epoxy resin slurry: Epoxy resin: dibutyl phthalate: curing agent: cement = 100:20:20:100-200. When mixing, firstly stir the epoxy resin and dibutyl phthalate uniformly, add the curing agent and mix well, then add the cement and mix well, pour into the tank for use.

3 Then the grouting anchor is carried out, and the resin gun is used for pouring (maximum pressure is 0.4Mpa). In order to make the resin slurry in the hole full, the head should be deep into the bottom of the hole, and the tip of the gun will be slowly withdrawn outward during the pouring. After the slurry is filled, put the No. 3 steel Φ6 anchor bolt. In order to improve the bonding effect, the bolt should be made into a thread type, and a hex nut should be screwed at one end to bond the marble plate.

4 When placing the bolt, first apply a layer of epoxy resin slurry on the surface of the bolt rod (the mixture ratio is epoxy resin: dibutyl ester: curing agent = 100:20:20), then slowly transfer it into the hole. In order to avoid the epoxy resin slurry flowing out and pollute the marble surface, the lime paste may be temporarily used to block the hole. After the epoxy resin slurry is solidified, the plug is cleaned again. For the resin slurry remaining on the marble surface, acetone or The xylene should be scrubbed in time to avoid staining the wall.

5 After 2~3 days after grouting, the color is sealed with 107 rubber white cement paste. The color of the color paste should be as close as possible to the surface of the repaired marble.