1.2 the surface plastering gypsum is mixed with an appropriate amount of admixture, which is used for the bottom plastering gypsum or other thin-layer leveling or finishing gypsum plastering materials on the base.
When plastering a large area, a sample room shall be made Construction can be carried out only after passing the acceptance.
6) the indoor construction temperature in winter is more than 5 degrees, and the doors and windows should be closed in summer due to high temperature and windy.
First put the water into the mixing bucket or mortar mixer, then pour the gypsum powder on the bottom layer, mix it for 2min, and then use it.
Details of plastering gypsum 1.
The mortar cake shall be made of the same material as the plastering layer and plastered into a 50mm square.
Brief description of plastering gypsum 1) clean the base wall (clean up dust, dirt, oil stain, release agent, etc.) 2) wet the wall (apply special interface agent) 3) lay glass fiber mesh on different material substrates, with a total width of ≥ 300mm and a lap width of ≥ 150mm with each substrate.
2.2 plastering gypsum shall not be affected by moisture and mixed with sundries during storage and transportation, and shall be stacked according to different categories and numbers during loading and unloading; Rain proof and moisture-proof measures shall be taken during storage, and expired and damp caked plastering gypsum shall not be used.
The spacing between the two bars is ≤ 2M and the width of the bars is 30mm-50mm8) the gypsum slurry shall not be affected by moisture and rain.
Plastering gypsum is also called plastering gypsum, It is a plastering material made of hemihydrate gypsum and type II anhydrous calcium sulfate alone or mixed with admixture as the main cementitious material.
2.
Fixing Socket Cross Hole Nail Plate
Plastering can be carried out when there is no water drop flowing on the wall surface, or special interface agent can be used for surface treatment.
4.2 before plastering, the floor, handrail, handrail, doors and windows with decorative layer shall be protected with covering materials; The installed pipes, fire boxes, electrical switch boxes, junction boxes, embedded parts and equipment shall be protected with covering materials; Dense pipelines should be installed after the gypsum plastering construction is completed.
The alkali resistant glass fiber mesh shall be pasted at the plastering thickness away from the base wall, the total width shall not be less than 300mm, and the overlapping width with each matrix shall not be less than 150mm3 3 the thickness of the plastering layer shall be determined according to the flatness and verticality of the wall, and shall comply with the following provisions: (1) when the thickness of the plastering layer is not more than 5mm, the surface plastering gypsum can be directly used; (2) When the thickness of the plastering layer is greater than 5mm, the bottom plastering gypsum can be used for priming, and then the surface plastering gypsum can be used for covering.
The product shelf life is 6 months in normal bags (it shall not be stored in a humid environment and shall not be affected by rain).
The silo shall be provided with rain proof and layered segregation reduction measures, and shall be clearly marked (3) precautions before construction 3.1 for the external corners of indoor walls, columns or door and window openings, cement mortar or dry mixed plastering mortar shall be used as corner protection, the height shall not be less than 2m, and the width of each side shall not be less than 50mm.
1.3 mechanical spraying plastering adopts the plastering process of pumping the plastering gypsum mixture to the outlet end of the spray gun, and then spraying the gypsum on the working surface with compressed air.
Construction 4.1 operation instructions shall be prepared for gypsum plastering construction according to the engineering conditions.
(2) The base course shall be flat and firm.
(3) Before plastering of brick wall, concrete wall and ceiling, water shall be sprayed once – twice; Aerated concrete block wall and light plate partition wall shall start drinking water 2h-3h before plastering construction, and the watering frequency should be 2-3 times.
The preparation of machine sprayed plastering slurry shall comply with the following provisions: 1) the plastering gypsum can be fed in bags or in bulk on site; 2) the whole process of plastering gypsum slurry mixing shall be completed automatically in the shotcrete machine, and the amount of water added shall be in accordance with the requirements of the product operation manual; 3) the construction interruption time shall be greater than 45min or after the spraying work, the mixing pump, conveying pipe, spray gun and other construction tools shall be cleaned..
3.2 alkali resistant glass fiber mesh shall be laid at the junction of different material substrates.
2.3 when plastering gypsum is in bulk, it shall be stored in a special closed silo.
4.3 before construction, the level should be used to hang the vertical, set the square, find the rules and make the ash cake, which should meet the following standards: according to the design requirements and the flatness and verticality of the base surface, use one wall as the benchmark to hang the vertical, set the square and find the rules.
When the plastering thickness is determined after inspection, the upper ash cake should be plastered first, and then the lower ash cake should be plastered, Then check the verticality and flatness with a ruler.
5) the coating thickness is (5-25) mm, which can be applied once, (25-35) mm is divided into two times.
4) the one-time feeding amount of gypsum slurry must be used up within 30 minutes, It is not allowed to add water for mixing after thickening.
Defects such as concave convex parts and non reserved holes on the base course shall be treated with materials with similar performance, and cement mortar corner protection lines shall be made for skirting, windowsill plate, column, door and window opening and other parts.
3) the amount of water added to the plastering gypsum on the surface layer shall be in accordance with the requirements of the product operation manual, first put the water into the mixing bucket, then pour the gypsum dry mixture, and mix it with a portable electric mixer for 2min, After standing for 3min, stir for the second time and mix well before use (Note: after the consistency of gypsum slurry changes, it is not allowed to add water for mixing for the second time).
4.
4.5 slurry preparation manual plastering slurry preparation shall comply with the following provisions 1) the one-time feeding amount of plastering gypsum on the bottom layer and surface layer shall be the amount used up within the specified time; 2) The amount of water added to the plastering gypsum on the bottom layer shall be in accordance with the requirements of the product operation manual.
4.4 base course treatment (1) the dust, dirt and oil stains on the base course surface shall be cleaned before plastering.
7) reinforcement requirements: when the wall height is ≤ 3.5m, make firm reinforcement, and the spacing between the two reinforcements is ≤ 1.5mm; When the height of the wall is more than 3.5m, horizontal bars should be made.
Packaging, storage and transportation 2.1 the packaging of plastering gypsum shall be divided into bags and bulk.
The shelf life of bagged plastering gypsum shall be 6 months and that of bulk plastering gypsum shall be 3 months.
1.1 the bottom plastering gypsum is mixed with an appropriate amount of admixture and aggregate, and the gypsum plastering material used for base leveling.
