1. Before the construction of polystyrene concrete block masonry, the plan and elevation block arrangement of polystyrene concrete blocks should be drawn according to the house design drawing. The staggered overlap arrangement should be carried out according to the specifications of polystyrene concrete blocks, the thickness and width of mortar joints, the size of door and window openings, the height of lintels and tie beams, the location of structural columns, the size of reserved holes, the structural thermal bridge and shear wall insulation structure, the laying positions of pipelines, switches, and sockets, etc., and the main specification blocks should be used as the main ones, supplemented by corresponding matching blocks.
2. Before the construction of polystyrene concrete block masonry, the base should be cleaned and leveled. The masonry should start from the corner positioning of the outer wall of the house. The number of masonry skins, mortar joint thickness, and mark height should be consistent with the corresponding marks of the skin number pole of the project. The skin number pole should be erected at the corners and junctions of the masonry, and the spacing should be less than 15m.
3. When laying polystyrene concrete blocks, thin mortar joints should be used for horizontal and vertical mortar joints, and the thickness of the mortar joints should be ≤5mm.
4. Polystyrene concrete blocks should not be watered before laying. When the climate is abnormally hot and dry during construction, water can be sprayed slightly to moisten them before laying. Polystyrene concrete blocks with obviously damp surfaces should not be used.
5. When laying polystyrene concrete blocks, the bottom surface should be facing up and laid on the wall. Special masonry mortar should be laid as it is laid, and the mortar joints should be horizontal and vertical. The horizontal mortar joints should be fully paved with the bottom surface of the polystyrene concrete blocks by the mortar method; the vertical mortar joints should be filled with mortar with one end of the polystyrene concrete block facing up, and the wall should be squeezed tightly, and the mortar should be added and rammed to make it dense. The fullness of the horizontal mortar joint mortar should not be less than 90%, and the fullness of the vertical mortar joint mortar should not be less than 85%. It is strictly forbidden to use clean water to flush the mortar and fill the joints.
6. When laying polystyrene concrete blocks, they should be laid with staggered joints, and the overlap length should not be less than 90mm. When the overlap length is less than 90mm, a Ф4 spot-welded steel mesh should be installed in this horizontal mortar joint, and the distance between the two ends of the mesh and the vertical joint at this position should not be less than 400mm. The vertical through joint should not exceed two layers of polystyrene concrete blocks.
7. The inner and outer walls and the vertical and horizontal walls of polystyrene concrete blocks should be laid at the same time and staggered with each other. Temporary breaks should be laid into inclined joints, and the horizontal projection length of the inclined joints should not be less than the height of the inclined joints.
8. When laying polystyrene concrete blocks, they should be straightened at one time and leveled before the mortar loses its shape; polystyrene concrete blocks laid on the wall should not be moved or hit arbitrarily. If correction is required, the original mortar should be removed and re-laid.
9. The junction between polystyrene concrete block masonry and reinforced concrete columns, beams, shear walls and other different materials should be reinforced with glass fiber mesh or galvanized welded mesh, and should comply with the following regulations:
9.1. When using glass fiber mesh as a reinforcement mesh to prevent wall cracking, the laying and overlap of the glass fiber mesh should comply with the following regulations: 2mm~3mm thick anti-cracking mortar should be applied on the base layer, and the reinforcement mesh should be pressed into the anti-cracking mortar with a trowel. The surface anti-cracking mortar should be applied after the bottom anti-cracking mortar is slightly dry. The thickness should be 1mm~3mm, and all reinforcement meshes should be covered: The laying of glass fiber mesh should be flat without hollows and wrinkles. The overlap width of glass fiber mesh and concrete columns, beams, shear walls, etc. should not be less than 200mm on each side. 9.2. When galvanized welded mesh is used as a reinforcement mesh to prevent wall cracking, the construction process should comply with the following regulations: Before hanging the mesh, the joints, holes, opening edges and other parts should be repaired, and the repairs should be filled and smoothed in layers; when hanging the mesh, the concrete wall can be fixed with nails, and the polystyrene concrete block wall can be fixed with steel nails; the spacing between the fixed steel nails should not exceed 400mm; the steel nails should be nailed in the mortar joints, and the nails and steel nails should be equipped with washers or pressure plates to tighten and fix them. The galvanized welded mesh should be flat, continuous, and firm, without deformation and arching; the overlap width of the galvanized welded mesh and concrete columns, beams, shear walls, etc. should not be less than 200mm on each side, and the galvanized welded mesh should be placed in the plaster layer and should not be exposed. 10. Wall materials of different materials should not be mixed in the polystyrene concrete block masonry, and matching blocks of the same material as the polystyrene concrete blocks should be used when laying.
11. Under normal conditions, the masonry height of each H of polystyrene concrete block masonry should be controlled within 1.5m or one step of scaffolding height.
12. For holes, pipes, grooves and embedded parts required by the design or construction, anti-leakage and anti-corrosion treatment should be done well. There should be thermal insulation structural measures around the pipes, and they should be reserved or embedded during masonry. Holes and grooves should not be drilled on the built walls. The laying and installation of water and electricity pipelines should be closely coordinated with the progress of civil construction according to the requirements of the polystyrene concrete block layout drawing, and grooves and holes should not be drilled afterwards.
13. When vertical water and electricity piping is set on the polystyrene concrete block masonry, mechanical grooving should be adopted. Water and electricity piping should use semi-rigid flame-retardant plastic pipes with an outer diameter of no more than 20mm. The back and surrounding of the pipe groove should be filled with thermal insulation slurry, and a 200mm wide glass fiber mesh should be laid on the surface, and the surface should be plastered with polymer mortar.
14. A certain gap should be left at the connection between the top surface of the polystyrene concrete block masonry and the frame beams and slabs. After the masonry is completed and there should be a interval of at least 15 days, the gap under the frame beams and slabs should be filled with insulation mortar and flush with the self-insulating masonry wall.
