Granitic plaster wall construction technology

1 scope

This technology is applicable to general industry and civil architecture wall granitic plaster, water brushes bean stone construction.

2 construction preparation

2.1 materials and equipment:

2.1.1 cement: No. 325, cement or Portland cement and above, same color, should be used with the batch of products.

2.1.2 sand: sand. 5mm before using the sieve of aperture.

2.1.3 gravel: solid particles shall not contain harmful substances such as clay and other organic matter. Gravel specification, the specification requirements, grading should comply with the design requirements, eight per cent to 6mm, small eight per cent to 4mm. Wash before use, according to specifications, colours and Marshall dry, stacked, sheet cover for later use. Requirements consistent with gravel color, should be delivered.

2.1.4 the small stone: size 5~8mm is appropriate, clay is less than 1%, with the first two times we have sieve, rinse with water and set aside.

2.1.5 lime cream: one month before using lime 3mm sieve, pour into lime paste, available in gypsum mortar should not contain particles and other impurities that are not cured.

2.1.6 lime: using water to stew through the week before their full ripening, when used shall not contain curing particles at the end.

2.1.7 other materials: 107 gum, YJ302 interface treatment agent and fly ash.

2.1.8 pigments: good alkali resistance and light resistance of mineral pigments.

2.1.9 equipment should be equipped with hand pump 2~3 (according to the amount of brushed stone and construction staff size), wood float, large bar, mini bar, feet, feet, steel trowel, son of pressure, paste pots, large (small) bucket, soft (or hard)-hair brush, chopsticks, and so on. Plastering tools such as car, Gray Ash bucket, small barrels, iron and so on.

2.2 operating conditions:

2.2.1 structure project has been accepted.

Construction requirements 2.2.2 ready to double exclusive shelf or basket, bridge-type frame. The pole away from the wall 20cm shelf to guarantee operation. Feet best not left hand-eye on the wall to prevent secondary repair, resulting in wall of flowers.

2.2.3 reserved holes and disposed of through embedded pipe wall. Waterproof finish a wall cavity and tricking water test without leakage, check. Install Fixed door and window frames, and gap plugging tight with the 1:3 cement mortar.

2.2.4 clean walls, walls of raised concrete should tick. Recessed 1:3 cement mortar layer fill.

2.2.5 granitic plaster should be done before construction of large area model to determine the mix proportion and construction technology, obliges the person unified ingredients, and mix control.

3 operational processes

3.1 process:

Caulking around doors and Windows (precast concrete exterior wall cavity Board slot) → wall cleaning →

Watering moist walls (wall cavity slot tricking water test) → hanging vertically, set the rules, plaster cakes, Chong tendons →

Tiered bottom mortar → elastic → line → cell adhesion, drop gravel pulp

Repeated massage flushing shoot compaction → → iron trowel calendering, washed with hand pump wash stone →

Size pot bottom riffle in rinse, water-cement pastes caulking

3.2 base for concrete external wall:

3.2.1 primary processing: cutting hair on the surface of the concrete plate surface net meringue tick, dust brush off with a wire brush, rinse, water moist; 10% caustic soda water to the concrete surface with oil and dirt brush, rinse and dry, spray or dump 1:1 fine 20% 107 glue a cement mortar mixed with water consumption. End gel Hou watering conservation, until mortar and concrete Board stick prison (with hand broke mortar not off), party can for playing end of; or used YJ302 concrete interface processing agent on grass-roots for processing, its operation method has two species: first species, in cleaning clean of concrete matrix Shang, brushing "processing agent ° a, immediately follow with wipe cement mortar, requirements wipe gray Shi processing agent cannot dry. Second, just after finishing the treatment agent sprinkle a layer of sand particle size 2~3mm to increase the roughness of the concrete surface, until dry and hard of a base.

3.2.2 hanging vertically. Sets of rules: If the multi-storey buildings, using special cable hanging down from the top of the vertical, and after the guy wire, wire vertical requirements at Tai Kok, doors, plastering holes on both sides of layered cake. If the top should point, jambs and theodolite used in vertical vertical line and line layered plaster cake to find rules, horizontal direction to achieve the smooth consistency.

3.2.3 the underlying mortar: elevation of above the ash cake gluten-filled, brush 10% 107 adhesive mud mixed with water, immediately followed by layers and underlying mortar, mixing ratio can be chosen at the end of 1:l:6 at room temperature (mixing mortar) or 1:0.5:0.5:6 (fly-ash mortar mix), hit bottom with tie bar anyway, scrape and rub wood trowel. After the final setting of water conservation.

3.2.4-line grid, cell adhesion, water: according to the drawing size line, sticky, cells in epithelia to be flat, horizontal even vertical lines circles counterparts. And according to the specifications of part set drop.

3.2.5 wipe cement gravel pulp surface layer: scraping a within mixed 10% of 107 glue mud, follow with wipe 1:0.5:3 (cement: lime cream: small eight PCT) gravel pulp, bottom-up points two again and points grid article wipe flat, and timely with small bar check its flat degrees (wipe gravel layer to above points grid article LMM), then will gravel laminated flat, and pressure real.

3.2.6 trimmed and painted: Pat down will have good gravel surface compaction, will it cement slurry extrusion water brush dipped in water to grout brush, compacted again clear, repeated 3~4 times until the surface starts to gel, na no trace water brushes off the stone tablets for the degree. A brush with brush dipped in water to the cement slurry, one followed by the top down using hand pressure pump sprayer spray rinse, spray distance wall 10~20cm, cement wash out after the gravel surface, and finally a smaller water rinse the gravel surface. After wall moisture control, grid, and timely with cement plaster caulking.

3.2.7 operation program: soft face doors and Windows, Bay Windows, balconies, rain cover and other parts to brush the stone should be small and big, to ensure that the surfaces are clean and beautiful. Brushes Shi Yang corner, shower outside wash, and finally a smaller water rinse. Soft face cornices, window sill, balcony, rain cover and other surfaces should be done by the end of drip, width at top 7mm, width under 10MM, dark 10MM, not less than 30mm from the skin. Large stone wall brush one day to finish, before continued scouring a new live. Brushed stone to do the night before should be soaked with water, and after for spraying brush when wet mud is easy to clean, prevent pollution, wall. Wrong should be left on the grid slot.

3.3 base for brick walls:

3.3.1 base treatment: the plaster dust and dirt on the front grass-roots clean up, plug for hand-eye coordination, water wetter.

3.3.2 hanging vertically, set the rules: from the top layer with a special line, stretched wire hanging straight, then layering plaster cakes, angle of yin and Yang, on either side of the window, column, Duo, etc should be hanging straight, stretched wire, good ash cakes and filled bars.

3.3.3 the underlying mortar: at room temperature, mix it with 1:0.5:4 mortar or 1:0.3:0.2:4 mixed with fly ash mortar base, plastering gluten-filled to control the thickness of the plaster should be layered and loaded until the erase bar. Requested heading back again when ash. Mortars into their bond in the mortar joints, leveling the surface rubbing hair, water conservation after the final set.

3.3.4 playing line, divided into cells, cell adhesion, water: according to the drawing size line grid, cell adhesion, and cells to horizontal even vertical circle, drop of paste should be according to the specifications and drawings parts, and should be straight.

3.3.5 gravel-cement paste: scraping together of 10% 107 glue a cement slurry mixed with water consumption, and gravel 1:0.5:3 cement slurry, should wipe from bottom to top to the thickness of the grid, and feet with leveling, concave handle compacted after leveling, pressed, shooting up to the gravel on the face.

3.3.6 dressing, and spray brush: will has wipe good of gravel surface layer took flat pressure real, will its water mud extrusion, water brush dipped water will water mud brush to, again pressure real clear, repeatedly for 3~4 again, stay surface layer began early gel, refers to NA no marks, with brush brush not off gravel for degrees, a people with brush dipped water brush to cement pulp, a people follow with with hand pressure pump nozzle by Shang down order spray water scrub, nozzle General from wall 10~20cm, put surface water mud flush clean show gravel, last with small Kettle watering will gravel rushed NET, After wall moisture control, grid, and timely with cement plaster caulking.

3.3.7 operation program: soft face doors and Windows, window sills, balconies, rain cover and other parts brushes Shi Xian small and big, to ensure that the walls are clean and beautiful. Brushes Shi Yang corner applicators should wash from the outside, and finally a smaller water rinse. Cornice, window sill, soft face, balconies, rain hood bottom should do throat, wide on 7mm, down width 10MM, dark 10MM, not less than 30mm from the skin. Large stone wall brush finish a day, such as the need to continue construction, washing should be done the day before before the new live paint stone wet with water, for when spray is easy to clean after wet mud, pollution prevention wall.

3.4 winter rain during construction:

3.4.1 construction in winter to prevent the ash layer from the cold, should not be mixed with lime in the mortar paste, in order to ensure the workability of the mortar, the same volume of fly ash can be used instead. Such as playing ash mixing ratio 1:0.5:4 can be used (cement fly ash: sand) 1:3 cement mortar or cement gravel mixture mixing ratio 1:0 can be used ... 5:3 (cement fly ash: gravel) or to 1:2 gravel-cement slurry used.

3.4.2 plastering mortar using hot water mixing and take measures, when applied mortar temperature should not be below + 5 c.

3.4.3 plastering layer's early hardening without freezing.

3.4.4 to enter construction before winter, should be mixed with mortar admixture reduces freezing, plus calcium chloride or sodium chloride, the dosage should be adjusted according to the atmospheric temperature to 7:30, mortar, additive dosage.

3.4.5 of freezing method masonry walls, exterior plaster should be completely thawed before wiping, shall not be washed with hot water freeze walls with hot water or elimination of wall of frost.

3.4.6 winter stage construction.

3.4.7 construction taking the rain rain protection measures, has just completed a brushed stone walls such as the case when heavy rains washed, should pay attention to block to prevent damage.

4 quality criteria

4.1 project:

4.1.1 the variety and quality of the materials used must comply with the design requirements.

4.1.2 the plaster layer and must bond between plaster layer and the substrate, no delamination, hollowing and cracks and other defects.

4.2 Basic project:

4.2.1 surface: the stone tablets of clear, uniform distribution, close formation, consistent color, no trace of grain and Cha.

Section 4.2.2 (seam): uniform width and depth, (seam) is flat and smooth, Leng corners neatly, horizontal even vertical, smooth.

4.2.3 drop line (slot): flow direction is correct, drip line straight, throat width and depth is not less than 10MM, neat and consistent.

4.3 allowable deviation, as shown in table 9-5.

Granitic plaster wall surface tolerance table 9-5

Project tolerance (mm) method

1 façade vertical 5 2m supporting plate check

2 smooth 3 2m m on foot and wedged feeler Gage check

Angular vertical 4 3 Yin and Yang with 2m supporting plate check

4 corner square 3 Yin and Yang with 2cm feet and wedged feeler Gage check

5 foot Dado head straight 3 5M line and check

6 minutes straight 3 5M line and standard inspections

7 full height vertical single-layer, multi-layer h ≤ 20 ‰ and transit checks

Full height vertical top h ≤ 30 ‰ and transit checks

5 finished product protection

5.1 stuck to the door and window frames and brick mortar should be cleared in a timely manner. Aluminum alloy doors and Windows should be promptly stick protective film to prevent contamination.

5.2 when spray plastic mulch well let's give wall to prevent contamination. Especially windy day more carefully protected and covered.

5.3 building after the import and export of granitic plaster well let's give, should be nailed to wood protection angle, preventing the broken edges.

5.4 remove shelves and Interior and exterior cleanup, not to damage the glazing and contamination and water brushing stone walls.

5.5 painters brush oil tank should be take care not to over contaminated walls, brush for have stone sills and convex lines, should be protected, do not pedal step on the damage.

6 quality problems to be noticed

6.1 gray layer bond not prison, and empty drum: reasons is grass-roots not watering wet; grass-roots didn't cleanup or cleanup not clean; each layer gray with have too tight or once wipe gray too thick; playing end of Hou didn't watering conservation; prefabricated concrete outside wall board too smooth, and grass-roots didn't "hair of" processing; board surface crisp skin not tick chisel clean; points grid article sides empty drum is because up article Shi will gray layer pulled crack. Should pay attention to the grass-roots level of cleaning, watering each ash plastering layer thickness is not too thick; the end of grey 24h attention to water conservation. Precast concrete wall panels must be clear and crisp the skin, and "texture".

6.2 the wall dirty, color inconsistencies: brush to erase stone walls not compacted, pit water in mud not rinse rinse or final use; a stock of raw materials is not enough; mixture ratio of cement or gravel, different colors or no gradation is not consistent. Erase operation should be repeated when kneading, where its uneven, and finally washed clean with water. Request brush mix has special master of stone, cement, gravel should be prepared.

6.3 crack, crack: due to uneven surface depth, scouring thin junction because of different weight fall when cracked, dry cracks enlarge live a few times is not enough, ash layer compacting is also easy to form lines or cracks; gravel with unripened grain, volume expansion of water surface burst. Required hits bottom ash flat, surface construction must be in accordance with standard side brush the water pressure, until the surface compaction and light so far.

6.4 rot: brushing stone and apron and waist line and other contact surface is not clean, there is debris on the surface, to be formed after debris clean roots due to bottom construction, live a few times is not enough, ash layers do not compact, formed after the flush dregs or local gravel is not dense. Brushing stone and apron and waist contacts clean; brushed stone root construction should be carefully and seriously.

6.5 negative pollution angle brush, stone, stone wall brush, opacity, not clear: internal corner do both sides brushed stone in two, then brush side brush earlier side of pollution. Entire wall pieces, done after a, scrub pollution have been doing a piece of both sides of the internal corner to find rules, once made and painted. On the large stone wall brush, to prevent pollution, in front of the stone after scouring brush, brush stone will be ready first flush clean with water and moist, then scour new brushes Shi, new living is completed, then rinse with clean water ready to brush the stone, prevent pollution caused by washing dirty, muddy.

6.6 brushes Shi Cha confusion, the overall effect is poor: brushes Shi cha in the child should remain in the compartment, or behind the waterspout, or decorations at the edge of independence, must not remain in the block.

7 quality records

This standard shall meet the following quality records:

7.1 cement factory prove and test reports.

7.2 certificates of quality of sand and mud content report.

7.3 quality certificates such as gravel, little pea stone.

7.4 certificate of lime, fly-ash factory.

7.5 other materials: 107 gum, factory certificate of treatment and how to use the YJ302 interface.

7.6 quality inspection and assessment of records.