1, Stone selection
The size and specifications of the stone are selected according to the prefabricated outer wall panels to be
Made. Under normal circumstances, the short side of stone is not more than 600mm, and the long side is in the range of 600~800mm.The thickness of stone is 25~30mm.The type of concrete surface stone, mostly granite, sandstone and marble, limestone, etc., but no matter what kind of stone, special attention should be paid to avoid those potential cracks, weathering for many years, vulnerable to freezing damage and easy to rust.
2, Stone back hole
Due to the high density of stone (about 2600~3100Kg/m), anchor should be embedded on the back of stone when using backstroke technology, as shown in Figure 2.Anchor hole on the back should draw anchor positioning line on the back of the stone, and determine the drilling position according to the actual size of the anchor and the embedded depth.The Angle of the drill bit should be 45 degrees diagonally and the depth 20mm.To prevent the stone from being pierced, the designated position of the drill bit can be marked.Install the anchor into the hole after injecting the reinforcement glue.
3,Brushing interface agent
Stone must do back treatment,the purpose is three: one is to put an end to the stone directly and concrete contact surface of the phenomenon of alkali birch;Second, the absorption of stone and concrete due to different thermal expansion rate of small relative displacement;Three is to prevent the anchoring part of the stone cracks fracture when falling.Brush the interface agent evenly on the back of the stone, and dry the interface agent on the back of the stone after completion.When drying, should put stone material aside in clean, neat wood square, in order to ensure stone material face is not destroyed and pollution.
4.Assemble the template
In the good template in place with a roller brush release agent, ensure that the release agent on the concrete contact surface evenly coated.lt is required that the surface is free from oil accumulation,fingers smear without oil stain, and the template surface is only a thin layer.Sponge strips should be pasted at the bottom of the template before installation to prevent slurry leakage.Fix the bottom die and the die table with screws, and then connect each template with screws.After alignment, tighten the screws and fix the side template and the top die with magnetic boxes.It is required that the distance between the two magnetic boxes is not more than 1000mm. It is strictly prohibited to run out of mold due to unfastened or loose fastening of screws and unstable fixing of magnetic box.Sponge strips are pasted at the bottom of the template to prevent leakage.
5, Laying stone
According to the stone layout in the design drawings, the cutting line is pasted on the mold table, and the installation position of each stone is accurately positioned.According to the positioning of the dividing line for stone arrangement, the stone closely spliced together, two stones in the middle of the stone separator, to ensure that the gap between the two stones evenly.After the stone laying is completed,glue is made in the gap between the stone and the gap between the stone and the template to prevent the leakage of concrete and pollute the stone.
6, binding steel bar
According to the requirements of the drawings, the steel bars required by the components are cut off and formed,and stacked according to the specifications, models and lengths for easy searching.The reinforcement bundling personnel shall check the specification, model, length and quantity of the required reinforcement according to the drawings, and bind the reinforcement after it is correct.Reinforcing steel bars should be set at the lifting point.
7, pouring concrete
Cloth should be uniform cloth.After the cloth is finished, the concrete is basically leveled manually. After the basic leveling of concrete is completed,.concrete vibration should be done "fast insertion and slow extraction" during vibrator rod operation.Vibrator vibration time is controlled in each one point 20,30 seconds, with concrete surface no longer significantly sink, no longer appear bubble, surface over spread mortar prevail.
