Brushed ash construction technology

1 scope

This technology is applicable to general industry and civil architecture wall brushed construction.

2 construction preparation

2.1 materials and equipment:

2.1.1 cement: No. 325 number of ordinary Portland cement and slag Portland cement, the cement of the same batch number.

2.1.2 sand: sand, 5mm sieve of aperture, which shall not contain organic material such as grass-roots, trash.

2.1.3 admixtures: lime, gypsum, fly ash, fine ground lime. Such as lime leaching Lime plaster, the maturing period of not less than 30D. Using hundreds of grey powder mixing mortar, curing time at least 3D.

2.1.4 water: tap water or clean water that contains no harmful substances.

2.1.5 adhesive: 107 adhesive, polyvinyl acetate emulsion, etc.

2.1.6 main machines: mixer, and iron (mix gray with), and 5mm sieve, and shovel, and big flat spade, and square spade, and gray picks, and gray spoon, and gray barrels, and iron wipe child, and wood wipe child, and big bar, and small bar, and burden Board, and pink package, and small bucket, and broom, and steel clip, and trolleys, and rubber pipes, and horoscopes by feet, and points grid article,.

2.2 operating conditions:

2.2.1 structure completed. Structure acceptance and after qualifying.

2.2.2 the repair shelves must be adjusted according to the brushed construction needs steps and height, is strictly prohibited in the reserve on foot-eye holes and construction of the wall.

2.2.3 construction of the wall must be at room temperature before watering, and clean up the wall of dust and dirt.

2.2.4 plastering the front door window frames should be installed in advance and check the installation location and installed strong degree, meets those requirements, use 1:3 cement mortar to doors and Windows with a crack in the wall connecting plug, and plug. If the gap is large, should be mixed with a small amount of mortar Ma DAO impaction dense. Aluminum alloy doors and Windows and wall connection slot according to the design requirements of workmanship.

2.2.5 the balcony rail, clothes hanging rail, laid on the wall piping, equipment and so on, should be installed in advance, columns, beams and other protruding walls of concrete rejection of flat, recessed early brush with water after Yin dialysis, use 1:3 or 1:1:6 mixed with mortar of cement mortar layer fill.

2.2.6 precast concrete wall panel seams should be processed well in advance, and check whether the cavity open, sew hook well after tricking water test, leakage can be carried out the next working procedure.

2.2.7 aerated concrete surface chipping off angle layered patches you want. By: spread and wet grass-root surfaces, brush 10% 107 adhesive mud mixed with water consumption, followed by 1:1:6 mixing mortar, each layer thickness control in 5~7mm.

2.2.8 brushed ash before the construction of large area should first do model, identification and determination of the construction methods, construction again.

2.2.9 high-rise building using theodolite angle on both sides, holes on both sides of doors and Windows, balcony and other parts out vertical lines on both sides, do a gray pie; available specially made large multi-story buildings starting from the top, in large angle side, door hole on both sides, hanging balconies on both sides of the vertical line, ash cakes. The ash cake that is the basis for the later plaster layer.

3 operational processes

3.1 process:

According to pie filling bars loaded document underlying mortar → → → maintenance → line, lattice cell adhesion →

-Brushed grey brushed → → → dinging → maintenance → quality control

3.2 base for brick wall method of operation:

3.2.1 according to lime pie filling bars that have been good, make sure the wall flat. Gray-mix at room temperature by the end of construction for the 1:0.5:4 or 1:0.2:0.3:4 (mixed mortar, mixed mortar or cement fly ash).

3.2.2 mesh, elastic line and cell adhesion according to the drawings, special nodes, such as Bay Windows, balconies, stone face, such as the following, you should paste drop.

3.2.3 brushed grey, the mix is: cement: Lime plaster: sand =1:0.5:0.5. Brushed ash bottom ash before watering, and water needs to suitable, walls are too wet, brushed ash falling flow-prone if ash is too dry, not easy to operate, hair pulling is not uniform.

3.2.4 napping when gray, the best two people cooperate, one in the front brushed gray, another man followed with a wooden float smoothly on the brushed grey, homeopathy gently and then pull it up, napped hard and uniformly, speed to be consistent so revealing, even small.

3.2.5 patch perfect: individual hairs do not meet the requirements, can repair 1~2 times, so far has been to meet the requirements.

3.2.6 operate according to more than pull the wool has edges, and very distinct, slightly dry, then float gently down so that the entire surface is a discontinuous pattern.

3.2.7 requires picking the edges are not continuous pattern, through the model, and by design, the party, supervision and acceptance, before extensive construction.

3.3 of the primary wall of concrete method of operation: base requirements with external wall cement mortar; surface galling practices the former.

3.4 grass-roots operations for aerated concrete walls: base requirements with external wall cement mortar; surface picking methods ibid.

3.5 Auditorium, theater, conference room within the wall in order to have good sound-absorbing effect, also used brushed the wall. Practice is as follows:

3.5.1 paper cover grey brushed how to:

3.5.1.1 layered plaster: according to the different substrates, different mix, layered and good underlying mortar.

3.5.l.2 cover surface gray used paper reinforced gray picking operation Shi, a people in front wipe paper reinforced gray (its thickness according to picking of length and set), another a people follow in behind with hard bristles brush to wall Shang vertical took pulled, pulled raising head, operation Shi forced to uniform, makes pull of hair size uniform, as individual place pull of hair not meet requirements, can fill pulled.

3.5.2 picking operation of cement lime mortar method: brushed cement lime mortar cement lime mortar and cement, lime and paper picking two of reinforced mortar.

3.5.2.1 mortar operations methods ibid.

3.5.2.2 cement lime mortar picking Shi of cover surface gray tie than should for 1:0.5:1 (cement: lime cream: sand), construction Shi two people tie for, a people in Qian wipe cement lime mortar, another a people in Hou for picking, picking Shi with Ma brush (diameter according to picking knot size and set), in wall surface Shang is area, pull hair knot, operation Shi requirements forced consistent.

3.5.3 Add paper reinforced cement lime mortar picking: picking ash mix ratio is of cover: cement-mixing the right amount of lime paste, shaggy Lime plaster weight 3% of paper bars; pull hair when mixed with 25%~30% lime paste and the right amount of sand.

When the shaggy, ash 4~5mm thickness of mortar on the ground floor, with a touch of iron pulled back to the surface.

Lazhong, available when fine iron trowel, you can also use hard bristle shuala, demanding tone does not show.

3.6 winter rain during construction:

3.6.l picking plastering of exterior wall construction should be stopped during the winter period, when early winter can lower the freezing point of antifreeze should be mixed into, such as the surface layer of paint coating, should be mixed with additives and coating materials to match.

3.6.2 picking construction of winter indoors, and the temperature should be above + 10, in order to facilitate construction.

3.6.3 construction should do well with rain rain-proof facilities, rain, brushed the wall construction is strictly prohibited.

4 quality criteria

4.1 project: 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 pick uniform pattern, spotted, same color, don't Cha.

Section 4.2.2 (seam) of quality should be horizontal even vertical.

4.3 allowable deviation, as shown in table 9-7.

Brushed plaster allows tables to be errors and the test method 9-7

Project tolerance (mm) method

1 surface 4 2m m on foot and wedged feeler Gage check

2m angle vertical 4 2 yin and Yang of care with Board examination

3 2cm elevation vertical 5 of care with Ray

4 corner square 4 20cm feet and wedged foot check

5 finished product protection

5.1 external wall lamaoqian not picking parts should be blocked, clean the dirt from the hand and foot.

5.2 aluminum alloy door and window protection film should be checked for integrity, mortar residue on the door and window frames should be cleared in a timely manner.

5.3 turn Board, and when the shelf, should be taken to prevent hit touch brushed the wall.

5.4 Oilers no stepping on the pedal when you brush oil brushed surface and edges, never put the tank knocked off to prevent the paint picking wall of pollution.

6 quality problems to be noticed

6.1 picking uneven color of exterior wall flowers: why is the quality of the cement, the variety is not uniform or not of the same batch of cement; picking different thickness; NAP length is not uniform; brushed grey mix are not allowed. Requirements brushed the wall using the same species, with the label, with the batch number, at the same time to enter the cement; a hand grasp the mortar mix; when the NAP should be free operation, make them consistent construction approach and pull out the hair length, uniform.

6.2 napped Cha clear: brushed the outside wall design does not require a grid; dumped dumped carelessly rub without law; picking layers overlapping of Cha. Requirements-brushed outer wall construction should be located, Cha-child should be left in or behind the waterspout inconspicuous places, not carelessly thrown Cha. Cha napped thickness of the layer should be strictly controlled to prevent galling Cha obviously caused by overlapping colors increase.

6.3 out of uneven length, uneven sparse: operator manual skilled enough, force size, should enhance the operator's training and guidance.

6.4 second patch Cha considerably: reserved hole in the wall hole didn't block well in advance and reserve equipment; secondary tick chisel design changes. Should step up its inspection checks, improving handover between types of inspection to prevent jobs pay between coil and secondary repair of damage caused by each other.

7 quality records

This standard shall meet the following quality records:

7.1 raw material factory certificate and test report (cement, sand, and lime).

7.2 adhesives factory certificate.

7.3 winter admixture of material proof.

7.4 quality inspection and assessment of records.