Key points for concrete blocks using gypsum mortar

1. Before construction, the edge line should be popped up at the construction position, and then the construction should be carried out according to the edge line one by one.

2. Autoclaved aerated concrete blocks constructed using the thin ash masonry method should not be watered or moistened before masonry. The scraping method should be used, and the vertical joints should be first batched with mortar and then laid.

3. Four skins of solid bricks should be laid on the floor first, and solid bricks should be built on both sides of the door and window openings, with each side not less than 240mm. Walls should be built at the same time, and no slanted rafters should be left. The daily building height should not exceed 1.5m or the scaffolding height should be staggered up and down when building. The length of the blocks should not be less than 1/3 of the block length, and should not be less than 150mm. , if it cannot be met, tie-tie steel bars or mesh should be installed in the gray joints.

4. During construction, the tie steel bars planted in the columns must be built into the wall. The specifications, quantity, spacing, and length of the tie steel bars should meet the design requirements. ; Fill the gaps with the frame columns with mortar to fill the wall masonry. The position of the tie bars or mesh left in the masonry should be consistent with the skin number of the block. The tie bars or mesh should be placed in the mortar joints, and the length should comply with The design requires that the vertical position deviation should not exceed the height of one skin brick. For the autoclaved aerated concrete block auxiliary body constructed by the thin ash construction method, the tie bars should be placed in the grooves provided on the upper surface of the block.

5. The mortar joints of the autoclaved aerated concrete block masonry filled wall masonry should be horizontal and vertical, and the mortar should be full. When using thin layers of ready-mixed mortar, During construction, the thickness of the horizontal mortar joints and the width of the vertical mortar joints should be 2mm-4mm. The mortar fullness of the mortar joints should not be less than 80%. The spot inspection should not be less than 5 for each inspection. The inspection method is to measure the thickness of the horizontal mortar joints with a ruler for 5 skins. The height of the small block is converted; the vertical mortar joint width is converted by measuring 2m of the body length with a ruler. The mortar fullness is inspected using a hundred grid to check the bonding trace area of ​​the mortar at the bottom or side of the block.

6. The autoclaved aerated concrete block-filled wall constructed using the thin-layer construction method should be reliably connected to the main structure, and its connection structure should meet the design requirements. , Without design consent, the connection construction method shall not be changed at will.

7. When applying autoclaved aerated concrete blocks using the thin-layer masonry method in winter, they should not be watered and moistened. The mortar test blocks should be retained during winter construction. , in addition to the requirements of normal temperature, a set of test blocks maintained under the same conditions as the turned body should be added to test the strength after being transferred to normal temperature for 28 days. If there are special needs, additional test blocks maintained under the same conditions for the corresponding period can be added. piece.

8. The openings, pipes, and trenches required by the design should be correctly reserved and embedded during masonry. No digging or drilling of walls or trenches is allowed without the approval of the design. Cut horizontal trenches into the wall. When the infill wall is built close to the bottom of the beams and slabs, there should be a certain gap. After 14 days of completion of the wall construction, use solid bricks to tighten the wall obliquely. The brick inclination is about 60°, and the mortar should be full.

9. The method of filling the wall with aerated concrete blocks and pre-preparing wooden bricks is to use on-site prefabricated concrete blocks with wooden bricks that are the same as the wall width, 120 meters thick and 200 meters long. The pre-embedded wooden bricks for door and window openings should have the small end outside and the large end inside. The number is determined according to the height of the opening. The height of the opening should be within 1.2m, and 2 bricks should be provided on each side. There are 3 blocks on each side with a height of 1.2m-2m. There are 4 bricks on each side with a height of 2m-3m. Their positions are generally four bricks above and below the opening, and they are evenly arranged in the middle. The wooden bricks should be anti-corrosion treated in advance. </p