Within the walls of lime mortar technology

1 scope

This technology is applicable to industrial and civil architecture wall in lime mortar (including cement kicks or Dado and the window).

2 construction preparation

2.1 the main materials and machines:

2.1.1 lime cream: massive lime cream, holes no larger than 3mmx3mm sieve filtering must be used and stored in a settling tank. Curing time at ambient temperature of not less than 15D for covering grey, shall not be less than 30D. When using lime paste may contain particles and other impurities that are not cured.

2.1.2 pulverized quicklime: its fineness through 4900 hole/cm2 screen, full with water before curing, curing time should be more than 3D.

2.1.3 cement: 325 mesh slag cement and ordinary Portland cement. Factory-certified or retest when shipped more than three months, according to the test results.

2.1.4 sand: sand, average size of 0.35~0.5mm and 5mm before using the sieve of aperture. And shall contain impurities.

2.1.5 paper reinforcement: before use should be soaked, mashed, and clean cover suitable for grinding fine paper reinforcement. Straw. Straw should be tough, dry, and free of impurities, its length should not be greater than 30mm. Straw, wheat straw should be dipped in lime pulp.

2.1.6 Ma DAO: need soft, dry, knock loose, does not contain impurities, length 10~30mm, 4~ 5d with lime plaster adjusted before being used (also available synthetic fibers).

2.1.7 main machines: mortar mixer, and paper reinforced gray mixer, and flat spade, and sieve (aperture 5mm), and narrow trolleys, and big barrels, and gray slot, and gray spoon, and 2.5M big bar, and 1.5M in the du, and 2m by feet Board, and line pendant, and steel tape, and feet, and supporting gray Board, and iron wipe child, and wood wipe child, and plastic socks, and horoscopes by feet, and 5~7mm thick party mouth by feet, and yin and Yang angle wipe child, and tongue iron wipe child, and iron level, and hairy brush, and brush, and wire brush, and broom, and watering can, and rubber pipes, and small bucket, and pink bags, and small white line, and Drill (sharp, flat head), hammer, pliers, nails, supporting Board and tool bags.

2.2 operating conditions:

2.2.1 subject to the relevant authorities for structural engineering acceptance of qualified before plastering.

2.2.2 plaster should be checked before the door and window frame installed in the correct location, connected with the wall is solid. Cracks at the connection with 1:3 cement mortar or 1:1:6 density of cement mortar mix layer impaction, if the gap is large, should be mixed in a small amount of mortar Ma DAO impaction, chinking compacting; wood door needs to set up metal protection.

2.2.3 lintels, beams mat, beam and concrete composite columns bulge on the surface picking. Honeycomb, pockmarked face, exposed ribs should tick into reality, brushed grain slurry (water weighs 10% 107 glue), followed by 1:3 cement mortar layer fill; foot-eye should be blocked, and exposed steel head, first to remove the wire, and sill tiles should be filled; within the walls and floor, breast, at the junction of diagonal brick.

2.2.4 the piping through the hole in the wall and floor holes should be placed in time casing and 1:3 cement mortar or concrete filled bean-compacting; wires and pipes, fire box, power distribution who installed, and Lomond part nailed behind wire mesh junction boxes with paper jam.

2.2.5 the closet doorframe and wooden accessories are installed; curtain hooks, air grate. Wall cabinets and other embedded iron parts location and elevation are accurate, and the good corrosion, rust-proof paint.

2.2.6 brick surface of the grass-roots should be cleaned of dust, dirt and grease, water and moist.

2.2.7 interior height and plastering site specific conditions, prepared plaster stool or scaffolding, shelf away from the wall and corner 200~250mm to facilitate the operation.

2.2.8 indoor construction plan should be developed before the construction of large area, first model, the accredited after the construction of large area.

2.2.9 when indoor plastering roofing waterproofing project finishes, protective measures must be taken.

3 operational processes

3.1 process:

Water wall hanging vertical plaster cake → → cement corner kick or Dado → do → cement ledge →

Walls filled with sand ash → reinforced → cover grey

3.2 water wall: plaster a day after hose water wet from top to bottom.

3.3 General plastering quality requirements divided into ordinary, intermediate and advanced levels, average thickness of Interior brick wall plaster, shall not be greater than the following:

General plastering--18mm

Intermediate plaster--20mm

Advanced plastering--25mm

The plastering quality level according to the design drawings, case-by-base surface vertical, hanging vertically, sets, rules, after screening to determine thickness of plaster, but should not be less than 7mm. Wall surface concave degrees larger Shi to layered lining flat (lime mortar and cement mixed mortar each layer thickness should be for 7~9mm), operation Shi first wipe Shang gray cake again wipe Xia gray cake; wipe gray cake Shi to according to indoor wipe gray of requirements (distinguish wipe played feet also is cement Dado), to determine Xia gray cake of right location, with by feet Board find good vertical and flat. Cakes should be treated with 1:3 cement mortar to put into 5cm square shape.

3.4 wipe cement played feet (or cement Dado): with water will wall surface Yin through, dust, and dirt real flush clean, according to has wipe good of gray cake filling reinforced (this reinforced should rushed have wide some, 8~10cm suitable, so reinforced that for wipe played feet or Dado of according to, while is wipe lime mortar wall surface of according to), fill sort of, wipe end of gray General used 1:3 cement mortar, wipe good Hou with big bar scraping flat. Wooden trowel rubbing hair at room temperature the next day will be plastering mortar. 1:2.5 cement mortar for surface layer of dust. When the Dado and skirting, should generally be protruding limestone Wall 5~7mm, but some practice with lime walls a flat or concave lime walls, according to the design requirements (Dado of cement mortar with this approach).

3.5 do cement nursing angle: indoor wall surface of Yang angle, and column surface of Yang angle and doors and Windows hole of Yang angle, application 1:3 cement mortar playing end of and by wipe gray cake leveling, stay mortar slightly dry Hou, again with 107 rubber pigment cement cream wipe into small round angle; or with 1:2 cement fine mortar do Ming nursing angle (than end of gray high 2mm, should and lime cover surface flush), its height not should below 2m, each side

Width of not less than 5cm. Door window corner finished, should be scrubbed with water cement slurry on the door and window frames.

3.6 concrete sill plate: first clean up the window base, loose brick masonry well again. Brick deep, pour water, solid stone concrete pavers and 1:2:3 bean, thickness greater than 2.5cm. The next day, brush with water 10%107 rubber pigment slurry, followed by 1:2.5 cement mortar layer, layer colors become white when water conservation 2~3D. Sill plates out plaster must be straight, without burrs.

3.7 wall surface reinforcement: the same as plastering mortar screed Strip, red bar number should be determined according to the width or height of the room, bar width is 5cm, transverse reinforcement can also be fully-filled Stud, according to construction habits.

3.8 ash: usually finish filling the bar 2H you can wipe bottom ash, plastering, to shave a thin layer, then layered with stalls, leveling, to big bar vertical, horizontal, scraping to find it again, use wood trowel twist hair. Then check the scratch coat is flat angle is founder of yin and Yang, pipe ash, and wall and the transition is smooth, and supporting plate check the vertical and flat wall. Plastering the wall behind the radiator, should be carried out before installation of the heatsink, plastering Ying Pingshun rub. After plastering should promptly clean up the loose mortar.

3.9 reserve holes, electrical boxes, troughs, box: when the bottom ash after the smooth, should assign individuals to reserve holes, electrical boxes, troughs, box of 5cm lime mortar scraped around and put on 1:1:4 the modified cement mortar mix, boxes, troughs, boxes around the hole, smooth, smooth.

3.10 cover gray: when the bottom six or seven dry, you can begin to cover gray (such as dry bottom ash water and moist). Cover gray twice survived, about 2mm, best two people simultaneously, a thin man blow it again, another person was erased. After first order, pressure real again, and with an iron trowel again, plastic trowel for final bearing, then with a brush dipped in water to cover net for cleaning dust pollution.

Winter construction of 3.11: should comply with the following requirements:

3.11.1 winter construction, Interior brick walls lime mortar insulation measures should be taken, mixing mortar materials must not be allowed to freeze. When applied, temperature should not be lower than 5 ° c of the mortar.

3.11.2 indoor lime mortar construction environment temperature should not fall below + 5 ° c. Advance good indoor heating insulation and cold work.

3.11.3 freezing masonry walls should be thawed, and indoor temperature above + 5 ℃, can be carried out indoor plastering. Not in negative temperature and freezing on the walls of lime mortar.

3.11.4 winter construction should pay attention to indoor ventilation and moisture removal, should have special responsibility for time switch, door and temperature measurement, plastering layer must not be allowed to freeze.

4 quality criteria

4.1 project: the variety and quality of the material provisions must comply with the design requirements and material standard; the plaster layer and must bond between plaster layer and the substrate, no delamination, empty drum surface no explosive dust and cracks and other defects.

4.2 Basic project:

4.2.1 surface:

Common plaster: the surface is smooth, clean, Cha and smooth.

Intermediate plasters: smooth, clean surface, Cha flat, corners straight and clear.

Advanced plastering: the surface is smooth, clean, uniform color, no lines, and gray line straight line angle square, clear and beautiful.

4.2.2 holes, troughs, boxes, plastering the surface behind the pipes: the correct size, orderly, smooth edges; pipes behind the flat.

4.2.3 gap between the door and window frames and wall packing density, surface roughness. Corner high degree of compliance with the construction requirements, smooth ride.

Section 4.2.4 (sew) width: depth evenly (seam) is smooth, Leng corners neatly, horizontal even vertical, smooth.

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

Lime mortar allows tables to be errors 9-1

Project tolerance (mm) test method

Regular intermediate advanced

1 façade vertical-5 3 2m supporting plate check

2 surface flat 5 4 2 2m m on foot and wedged feeler Gage check

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

4 point founder-4 2 20cm feet of yin and Yang and wedge feeler Gage check

5 points (seams) straight-3-5M line and length check

Note: l. intermediate fourth internal corner plastering this table founder is not checked.

2. the ceiling plaster second surface of this table is not checked, but Ying Pingshun.

5 finished product protection

5.1 prior to the door before the plaster frame cracks at the connection with the wall with cement mortar impaction compacting (aluminium door and window frames should allow certain caulk caulking materials, caulking materials determined by design); nail is located at the entrance of Tin or wood protection.

5.2 clean up residue on the door and window frames of the mortar in a timely manner. Aluminium alloy door and window frame must have a protective film and keep up to was completed when you should clean the glass.

5.3 push cart or carry something, pay attention not to damage the numbness of the mouth and the wall. Plastering gang and spade don't lean on the wall. No pedal step on the windowsill and prevent damage to its edges.

5.4 light down the scaffolding to demolition with care, after the removal of material neatly, not smashed doors and Windows, corner and angle.

5.5 to protect embedded in the wall, curtain hooks, air grate. The wire Groove on the wall, boxes, plumbing devices for reserved holes and don't die.

5.6 the plaster layer before dew, should prevent the quick-drying, water, impact, vibration and compression to ensure ash layers have enough strength.

5.7 should pay attention to protect the floor surface shall not be directly mixed with ash on the floor.

6 quality problems to be noticed

6.1 jambs, walls, skirting, Dado and catchy plaster hollow crack:

6.1.1 two fortress gray door and window frames, wall embedded wood tile spacing is too large or wood tile loose, switch vibration of grey air, earthquake shattered window frame on both sides of the door. It should be attached to the door frame Assembly process, should be responsible.

6.1.2 basic cleaning not clean or mishandling; watering through the wall, water quickly after plastering mortar base (or ash) absorbing, affecting the bond should be carefully cleaned up and watered in advance, bring the water into the brick walls inside 8~10MM to meet the requirement.

6.1.3 basic large deviation, a plaster is too thick, in shrinkage cracks should be layered lining, thickness of each layer to 7~9mm.

6.1.4 preparation of mortar and the quality of raw materials do not meet the requirements: different mix of different grass-roots should be required for the preparation of mortar, and strengthen the management of materials and mix plaster parts.

6.2 plastering layer blister. Lines, blasting ash, flowering:

6.2.1 after you wipe the cover gray, light and too tight, mortars have not received water, calendering excess water after evaporation of popping.

6.2.2 ash too dry, so water permeable. Or cover and after ash, water is absorbed by the bottom ash, so the light leak or pressure during difficult if too many floating water, wipe the surface after the ashes, floating on the ash surface, calendering lines occurred.

6.2.3 using pulverized lime powder, underfire ash particles and impurities not thoroughly filtered, fire ash, ash powder curing time, unripened grain in gypsum mortar, plaster in contact with water or moist air will continue to ripen after volume expansion, resulting in plastering layer of burst, flowering occurs.

6.3 plastered surface rough, angle not perpendicular, not founder of yin and Yang: should serious thread before plastering, ash cakes and red bar, corner of yin and Yang is also hub of tendons, along the bar, looking for rules.

6.4 played feet, and cement Dado, and window Board, catchy out wall thickness wood consistent, catchy Burr and spat not founder: operation Shi should seriously, by specification requirements hanging vertical, pull find straight, and find party, on catchy of processing, should stay big surface wipe finished Hou, timely returned feet put catchy wipe flat, and pressure light, take go by feet Hou with Yang angle small hairbrush, will angle put into small round.

6.5 heating Groove on both sides, from top to bottom the window corner plastering not smooth: according to specification hanging straight, upper and lower corner of the window should use a long foot, upper and lower operation and will do not Cha.

6.6 pipes plaster inequality, not just after, it tube cracks: should be placed according to specifications over the wall tube, plastering tools should be used after the pipe (long trowel or called Duckbill trowel, scraper, etc).

6.7 wooden roof, grounded Yin corner straight: plaster without branches scrape bar, in order to ensure the internal corner of straight, must be checked by dashes bottom ash, smooth, lift the rear cover.

7 quality records

This standard shall meet the following quality records:

7.1 cement factory prove and test reports.

7.2 factory certificate of sand and sediment tests.

7.3 quicklime or lime factory certified.

7.4 using adhesive and admixture of factory certification.

7.5 quality inspection and assessment of records.