Things to note when constructing composite self-insulating blocks

EPS composite self-insulating blocks are widely used, but there are still some issues that need to be paid attention to during the construction process. 1. Determine the assembly method: calculate the elevation of the lower brick according to the horizontal line, and determine the bottom leveling height (the horizontal mortar joint is greater than 20mm, It should be leveled with fine stone concrete first), wall edge line, location of door and window openings, and front wall orientation (the front wall of the outer ring of the frame faces inward, the front wall of the firewall near the expansion joint faces the room, the front wall of the stairwell faces the stairs, and the remaining parts face the outside of the room) , leave a gap of about 20 mm at the bottom of the beam until the upper brickwork is completed or fill the gap with cement mortar after one week.

2. Mix cement mortar (special binder): Mix M7.5 cement mortar and special binder. Use the finished product provided by the manufacturer to mix fine sand with the special binder at a weight ratio of 1:2 and mix evenly. It should be mixed and used. The mixing amount should be used up within 3 hours. If the ambient temperature is higher than 25°C, it should be used up within 2 hours after mixing.

3. Arrange bricks and lay down the bottom: Before laying bricks on each floor, the base surface should be moistened with water, and then paved with M7.5 cement mortar. Adhesive should be used for vertical mortar joints, and adhesive should be used for the entire upper part to control the mortar joints. About 4㎜～6㎜. The stairwell and elevator shaft bricks are made of cement porous bricks, and the rest are ceramsite-reinforced concrete blocks.

4. Bricklaying: Since the special binder contains glue components and ceramsite to enhance the non-absorbency of concrete blocks, the height should be controlled when laying bricks. The daily height of the blocks should be controlled at about 2 meters at room temperature.

5. When constructing each skin block, attention should be paid to correcting the level and verticality, and making staggered joints of the upper and lower skin blocks. The overlap length should not be less than 1/3 of the length of the overlapped blocks.

6. When building blocks, the adhesive should be evenly spread on the surface of the underlying blocks and the sides of the blocks to be laid. The mortar joints should be full, and the extruded adhesive should be cleaned up in time.

7. After the wall is built or after get off work at night, check the surface flatness and verticality of the wall. It should be adjusted or dismantled in time and started again.

8. The masonry is connected to the concrete columns and walls using "L" shaped iron parts with a spacing of 2 to 3 skins, but must be placed on the whole brick. Leave a 10mm gap between the block wall and the concrete column and wall. Use foaming agent to plug the joints after the upper brickwork is completed or one week later.

9. After the wall is built, the defective parts of the blocks should be filled with special adhesive, the adhesive that protrudes from the wall should be scraped off, and the work should be done to clean up.

10. After the upper brickwork is completed or one week later, the vertical joints between the block wall and the concrete columns and walls should be plugged with foaming agent, and the bottoms of the beams and slabs should be plugged with cement mortar.