CN107299731A - A kind of anti-hollowing of mountain sand cement mortar plastering and cracking construction method - Google Patents
A kind of anti-hollowing of mountain sand cement mortar plastering and cracking construction method Download PDFInfo
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- CN107299731A CN107299731A CN201610233310.7A CN201610233310A CN107299731A CN 107299731 A CN107299731 A CN 107299731A CN 201610233310 A CN201610233310 A CN 201610233310A CN 107299731 A CN107299731 A CN 107299731A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
- E04F13/04—Bases for plaster
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
- E04F21/04—Patterns or templates; Jointing rulers
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a kind of anti-hollowing of mountain sand cement mortar plastering and cracking construction method, it is included on the basis of common motar construction technology, by between plaster base and bedding mortar, increasing by one layer of 1~2mm soft pulp layer, while smearing the method for pressure bedding mortar using sawtooth pattern trowel.This method comprises the following steps：Base treatment；Beat ash cake；Plaster base water spray moistening；Scrape soft pulp layer；Smear bedding mortar；Bedding mortar is conserved；Float coat mortar；Surface layer Cement Mortar Used in Capital.After the anti-hollowing of mountain sand cement mortar plastering of the present invention, crack resistence construction method, inspection is beaten through hollowing hammer, the metope of same area does not almost have hollowing phenomenon, a small number of metopes check 1~3 hollowing phenomenon, hollowing area is also smaller, and high benefit is obtained in terms of construction quality, duration, cost, and most considerable is that ensure that plastering quality, risk and cost are reprocessed in reduction, and stealthy benefit is inestimable.
Description
Technical field
The present invention relates to a kind of anti-hollowing of mountain sand cement mortar plastering and cracking construction method, belong to construction engineering technical field.
Background technology
Southwestern China area, because river sand is rare, the fine sand used in wall plastering construction is generally natural mountain sand or mechanism mountain sand, because of mountain sand disproportionately graded, many reasons such as clay content is slightly higher, grain shape is irregular, cause the mountain sand plastering construction of Guizhou province hollowing, cracking phenomena often occur, increase and reprocess input after delivery of being completed.In order to improve the construction quality that mountain sand is plastered, cost is reprocessed in reduction, those skilled in the art are on the basis of the reason for analyzing motar hollowing, cracking, take considerable time that practice and research can not all solve the technical problem, therefore, how by improving construction technology, it is necessary to develop a kind of anti-hollowing of mountain sand cement mortar plastering, crack resistence construction method.
The content of the invention
It is an object of the invention to provide a kind of anti-hollowing of mountain sand cement mortar plastering and cracking construction method, to overcome the deficiencies in the prior art.
The technical scheme is that such：
A kind of anti-hollowing of mountain sand cement mortar plastering and cracking construction method, it is included on the basis of common motar construction technology, by between plaster base and bedding mortar, increasing by one layer of 1~2mm soft pulp layer, while smearing the method for pressure bedding mortar using sawtooth pattern trowel.This method comprises the following steps：Base treatment；Beat ash cake；Plaster base water spray moistening；Scrape soft pulp layer；Smear bedding mortar；Bedding mortar is conserved；Float coat mortar；Surface layer Cement Mortar Used in Capital.
Wherein, the ash cake of beating is controlled using infrared laser level, and vertically and horizontally spacing cannot be greater than 1.5 meters to ash cake, is not more than 300mm away from wall end, is not more than 400mm away from inner corner trim, and away from ground ＆ floor no more than 600mm, and same direction is no less than 2 ash cakes.Water spray is sprayed on wall basal plane with spray water from wall top down during the plaster base water spray moistening.The soft pulp layer is allocated formed in proportion using methylcellulose, cement, water, and soft slurry denseness is 60mm ± 20mm.The bedding mortar of smearing is after soft pulp layer blade coating, to carry out smearing the rough ash in bottom immediately, the rough grey thickness in bottom is 7 ~ 10mm；The rough ash in bottom is smeared using sawtooth pattern trowel, and compacting is first flattened repeatedly with trowel after upper ash, and trowel and metope then are smeared into sawtooth pattern by the rough ash in bottom by angle of inclination.Finishing mortar thickness is 5 ~ 7mm during the float coat mortar, and face ash quality is reached between flatness 0mm~3mm, between perpendicularity 0mm~3mm, between negative and positive angle squareness -3mm~3mm.
As a kind of preferred scheme, soft pulp layer is first using methylcellulose and 47~52 DEG C of water by 1:120~250 mass ratio is deployed into glue, and glue and cement then are pressed into 1.2~1.8 again:1 ratio allotment is formed.
In technical scheme, soft pulp layer is to match somebody with somebody to postpone by a certain percentage using methylcellulose, cement, water, blade coating is on plaster base, its effect mainly uses the cementability, thickening property, emulsibility of methylcellulose to increase the bonding force of mortar and basic unit, the stress of Mortar shrinkage cracking is constrained using its wetability, dispersiveness, water-retaining property and film forming, but also the water-retaining property of mortar can be improved（Mainly isolate or reduce the moisture that basic unit's masonry absorbs mortar）, so that it is guaranteed that mortar hydration and hardening normal development, reduces hollowing and cracking.
And pressure bedding mortar is smeared using sawtooth pattern trowel, on the one hand can be with the compacted mortar of Effective Compaction, on the other hand bedding mortar formation zigzag is made, bedding mortar shrinkage cracking is reduced during maintenance, and can make more effectively be interlocked between mortar surface layer and bottom, reduction hollowing, the possibility of cracking.
The increased soft pulp layer scraping and coating construction technique of this method of the present invention is similar with Puttying, and construction is simple；Bedding mortar is smeared using sawtooth pattern trowel, its construction technology and the technique of common trowel are almost without difference, but mass effect is notable, it is mainly manifested in the extruding using sawtooth pattern trowel, and bedding mortar is pressed into zigzag, on the one hand it is more closely knit, on the other hand reduce and shrink, increase is engaged with surface layer mortar.Generally speaking, technique is simply easily managed, and construction effect is obvious.
Technical scheme is applicable not only to the various engineerings that southwest mountain sand mortar is plastered, such as exterior wall, indoor filling wall, spool line box, structural beams bottom, sash close up outside subdivisional work or position, but also constructed suitable for all plastering engineerings in Fei Shan sandy grounds area.
Embodiment
With reference to embodiment, the present invention is described in further detail.
The construction technology process and key points for operation of this construction method of the present invention are as follows：
1. technological process and key points for operation：
Base treatment --- floating screed（Beat ash cake）--- plaster base water spray moistening --- scrapes soft pulp layer and --- smears bedding mortar --- bedding mortar maintenance --- float coat mortar --- surface layer Cement Mortar Used in Capital
1.1. preparation of construction：
Check 1m elevation lines and the plastering control line of bullet 285；Indoor plastering should get out door-type scaffold frame, and outdoor is plastered using outrigger, checked before construction.Frame body safe reliability；According to the correlated performance of the materials such as sand, cement, qualified lab design mortar mix ratio is asked.
1.2. base treatment：
Clear up structure residue, such as template, nail, timber wedge, the cement mortar of residual；The port closing of indwelling on reserved opening or other construction technologies；Wall and concrete structure combining surface treatmeX are filled, such as physical dimension has relatively large deviation position, should reject or repair；Small range difference of height position, should smear bevel, then linked network with cement mortar in advance；Wall is filled with that at Structural Joint, first should be tamped using standard brick and mortar, then linked network.Linked network width is beyond seam 150mm, if bonding state lap width is not less than 100mm.Steel wire, spacing@≤400mm are fixed with steel nail, and should be tightened.
1.3. floating screed（Beat ash cake）：
Ash cake quantity and seat are designed according to construction drawing, vertically and horizontally spacing cannot be greater than 1.5 meters to ash cake, is not more than 300mm away from wall end, is not more than 400mm away from inner corner trim, away from ground ＆ floor no more than 600mm, and same direction should not less than 2 ash cakes；
Beating ash cake preferably uses infrared laser level to be controlled, can solve tradition beat ash cake can not be precisely controlled approximately the same plane, can not complete the position perpendicularity such as door head, short wall, wall end the drawbacks of, advantage is can be precisely controlled ash cake thickness, adjust the perpendicularity deviation of structure wall, it is ensured that the perpendicularity and flatness for finished surface of plastering.And convenient and quick construction.
1.4. plaster base water spray is moistened：
Scrape before soft pulp layer, reply wall basic unit water spray is moistened（It is general to be no less than 3 days, and must not daily flood less than 2 times）, summer or windward side should take the circumstances into consideration to increase number of times.Wall water spray moistening requires that water penetrates into 10 ~ 20mm of matrix surface, and no longer water suction is advisable, and water spray is preferably sprayed on wall basal plane with spray water from wall top down.
1.5. soft pulp layer is scraped：
Soft pulp layer is first to be deployed into glue in proportion using methylcellulose, water, and its reclaimed water should use 50 DEG C or so of warm water, in favor of the dissolving of methylcellulose.Then glue is allocated in proportion with cement again and formed, should stirred during allotment using agitator, control ratio, if scene uses knife-coat application, can suitably coagulated the soup, according to roller coating, can be suitably let down.
Before soft pulp layer construction, wall basic unit water spray wetness conditions are checked, are advisable with wall surface drying without washmarking；Slurry can be exerted oneself directly to press and scraped on basal plane by soft pulp layer construction with iron plate, it would however also be possible to employ roller roller coating is on basal plane, soft slurry thickness 1mm ~ 2mm, it is desirable to which 100% completely scrapes or full coat.
Scrape before soft pulp layer, check wall basic unit water spray wetness conditions, hand is touched Wu Mingshui and is advisable with metope moistening；Scrape it is soft slurry with iron plate by slurry exert oneself directly pressure scrape on basal plane, soft slurry 1 ~ 2mm of thickness, soft slurry requires that 100% completely scrapes, not blanked.
1.6. scratch coat is constructed：
After soft pulp layer blade coating, the rough ash in bottom is smeared immediately, the rough grey 7 ~ 8mm of thickness in bottom is advisable, no more than 10mm, if it is local because of degree of gravity vertical forwall surface, flatness the problems such as more than 10mm when, answer two times and survive.
The rough ash in bottom must be smeared using sawtooth pattern trowel, first flattened and be compacted with trowel after upper ash, pressure need to smeared repeatedly, it is ensured that closely knit, then trowel has a certain degree with metope shape, the rough ash in bottom is smeared into sawtooth pattern.
1.7. bedding mortar is conserved：
Bedding mortar has smeared necessary wet curing after final set, and maintenance daily is no less than 2 times, and summer or windward side take the circumstances into consideration increase and conserve number of times, and curing time must not be less than 3 days, and maintenance need to set special messenger's maintenance, and form record.
1.8. float coat mortar：
Finishing mortar thickness is 5 ~ 7mm, and surface layer mortar is answered floating letter out, must be also compacted when plastering, and face ash quality should be reached between flatness 0mm~3mm, between perpendicularity 0mm~3mm, between negative and positive angle squareness -3mm~3mm.And negative and positive angle answers straight smooth.
1.9. surface layer Cement Mortar Used in Capital：
Surface layer mortar has smeared necessary wet curing after final set, and maintenance daily is no less than 2 times, and summer or windward side take the circumstances into consideration increase and conserve number of times, and curing time must not be less than 7 days, and maintenance need to set special messenger's maintenance, and form record.
2. the anti-hollowing cracking measure of key node：
2.1. the anti-hollowing crack resistence of spool, line box：
Control groove depth, the rubbish cleaned out during joint filling in wire casing is sufficiently humidified so as to wire casing, conserved using pea gravel concreten padding and compacting, and in time, finally along wire casing linked network, steel wire per side should it is wider than trough rim go out no less than 100mm.Line box surrounding is tamped with cement mortar, and smears into 45 degree of corner protectors.
2.2. structural beams base opening crack resistence：
Gap is stopped when building by laying bricks or stones, just carries out binding and building by laying bricks or stones after at least 14 days, linked network is plastered by above-mentioned construction technology before plastering.
2.3. sash is reserved and ftractureed at closing in：
Former base layer residual mortar has been cleared up during closing in；When scraping soft slurry must coverage rate reach more than 95%；Glue with original joint of plastering and alkali resistant glass fibre open weave cloth and split receipts face with doing.
3. material and equipment：
3.1. cement：
Using R32.5 or R42.5 Portland cements, the cement of different cultivars different labels is forbidden to be used in mixed way, and cement, which is marched into the arena, should check cement specification, brand, date of formation, product certificate, sampling check cement stability, setting time, intensity.
3.2. sand and other admixtures：
Using the middle sand that average grain diameter is 0.35~0.5mm, sand should cross the sieve in 5mm apertures before use.Debris must not be contained, clay content is not more than 3%.
Fine grinding quicklime powder：Fineness is not more than 13%, fully cured thoroughly with bubble using preceding by 4900 holes/cm2 sieve, accumulative screen over-size, and the curing time is no less than 3 days.
Fine-ground fly-ash：Fineness crosses 0.08mm square hole screen, and screen over-size is not more than 5%.Maximum doping quantity is not more than the 15% of cement consumption when replacing cement mixing cement mortar with flyash, and during substitution lime paste mixing mixed mortar, its maximum doping quantity cannot be greater than the 50% of lime paste consumption.
Methylcellulose：Appearance off-white threadiness, nontoxic, nonirritant taste.
Steel wire specification：15*15*0.7 hot-galvanized steel silk screen.
Performance analysis：After the anti-hollowing of mountain sand cement mortar plastering of the present invention, crack resistence construction method, inspection is beaten through hollowing hammer, the metope of same area does not almost have hollowing phenomenon, a small number of metopes check 1~3 hollowing phenomenon, hollowing area is also smaller, and high benefit is obtained in terms of construction quality, duration, cost, and most considerable is that ensure that plastering quality, risk and cost are reprocessed in reduction, and stealthy benefit is inestimable.
Embodiment 1：The exquisite gulf project first stage of the project of Kweiyang Wanke
The exquisite gulf first stage of the project of Kweiyang Wanke, positioned at Guiyang Yunyan District water East Road, is made up of Kweiyang Wanke Jin Yulan gulfs properties Corp investment construction 7,1 ~ 7# buildings high-rise residential building, Multi-storey villa area and underground garage, and overall floorage is 15.9 ten thousand square metres.High-rise residential building is 34 layers on the ground, has 2 layers of basement, structural shape is frame-shear-wall structure, building height 99.8m.Using the anti-hollowing of mountain sand cement mortar plastering and cracking construction method of the present invention, May 11 2012 on-stream time, time of completion is on November 2nd, 2015, does not occur plastering quality rework issues so far.
Embodiment 2：Middle day exhibitions city TA-1, TA-2 (Super High) project
Middle day exhibitions city TA-1, TA-2（Super High）Engineering throws Kweiyang International Conference ＆ Exhibition Co., Ltd of group investment construction by Zhong Tiancheng, positioned at new district Chang Ling, Guiyang Jinyang Lu Yuguan hill paths northwest corner, outlying traffic facility.A areas Residential Area high-lager building is closed in place north side, west side.It is made up of 2 Super Highs, annex and underground garage, 2 layers of underground, ground annex position are 3 layers, high building position is 43/44 layer, total land area is 14380.41m2, overall floorage is 158553.63m2, building general height is 200m, wherein one high building is hotel, in addition an outer office building, and structure type is frame-shear-wall structure.Using the anti-hollowing of mountain sand cement mortar plastering and cracking construction method of the present invention, on-stream time is on November 28th, 2012, and time of completion is on March 27th, 2015, does not occur plastering quality rework issues so far.
Embodiment 3：The exquisite gulf project the second stage of the project of Kweiyang Wanke
The exquisite gulf the second stage of the project of Kweiyang Wanke, positioned at Guiyang Yunyan District water East Road, is made up of Kweiyang Wanke Jin Yulan gulfs properties Corp investment construction 7,8 ~ 14# buildings high-rise residential building and underground garage, and overall floorage is 122451.66 square metres.High-rise residential building is 34 layers on the ground, has 2 layers of basement, structural shape is frame-shear-wall structure, wherein building height 99.8m, the first floor（Stilt layer）Floor height 4.1m, index bed floor height 2.9m；Basement negative one high 5.35m layer by layer, minus two high 3.6m layer by layer.Basement floor maximum gauge is 180mm, and its formwork-support height highest point is 5.23 meters.Using the anti-hollowing of mountain sand cement mortar plastering and cracking construction method of the present invention, on March 1 2015 on-stream time, decoration stage is currently in, does not occur plastering quality rework issues so far.
Certainly, it is the concrete application example of the present invention above, the present invention also has the technical scheme of other embodiments, all use equivalent substitutions or equivalent transformation formation, all fallen within protection domain of the presently claimed invention.
Claims (8)
1. a kind of anti-hollowing of mountain sand cement mortar plastering and cracking construction method, it is characterised in that：It is included on the basis of common motar construction technology, by between plaster base and bedding mortar, increasing by one layer of 1~2mm soft pulp layer, while smearing the method for pressure bedding mortar using sawtooth pattern trowel.
2. the anti-hollowing of mountain sand cement mortar plastering according to claim 1 and cracking construction method, it is characterised in that this method comprises the following steps：Base treatment；Beat ash cake；Plaster base water spray moistening；Scrape soft pulp layer；Smear bedding mortar；Bedding mortar is conserved；Float coat mortar；Surface layer Cement Mortar Used in Capital.
3. the anti-hollowing of mountain sand cement mortar plastering according to claim 2 and cracking construction method, it is characterised in that：The ash cake of beating is controlled using infrared laser level, and vertically and horizontally spacing cannot be greater than 1.5 meters to ash cake, is not more than 300mm away from wall end, is not more than 400mm away from inner corner trim, and away from ground ＆ floor no more than 600mm, and same direction is no less than 2 ash cakes.
4. the anti-hollowing of mountain sand cement mortar plastering according to claim 2 and cracking construction method, it is characterised in that：Water spray is sprayed on wall basal plane with spray water from wall top down during the plaster base water spray moistening.
5. the anti-hollowing of mountain sand cement mortar plastering according to claim 2 and cracking construction method, it is characterised in that：The soft pulp layer is allocated formed in proportion using methylcellulose, cement, water, and soft slurry denseness is 60mm ± 20mm.
6. the anti-hollowing of mountain sand cement mortar plastering according to claim 2 and cracking construction method, it is characterised in that：The bedding mortar of smearing is after soft pulp layer blade coating, to carry out smearing the rough ash in bottom immediately, the rough grey thickness in bottom is 7 ~ 10mm；The rough ash in bottom is smeared using sawtooth pattern trowel, and compacting is first flattened repeatedly with trowel after upper ash, and trowel and metope then are smeared into sawtooth pattern by the rough ash in bottom by angle of inclination.
7. the anti-hollowing of mountain sand cement mortar plastering according to claim 2 and cracking construction method, it is characterised in that：Finishing mortar thickness is 5 ~ 7mm during the float coat mortar, and face ash quality is reached between flatness 0mm~3mm, between perpendicularity 0mm~3mm, between negative and positive angle squareness -3mm~3mm.
8. the anti-hollowing of mountain sand cement mortar plastering according to claim 5 and cracking construction method, it is characterised in that：The soft pulp layer is first using methylcellulose and 47~52 DEG C of water by 1:120~250 mass ratio is deployed into glue, and glue and cement then are pressed into 1.2~1.8 again:1 ratio allotment is formed.
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| CN111042531A (en) * | 2019-12-23 | 2020-04-21 | 中冶天工集团有限公司 | Quick construction method for common plastering engineering plaster cake |
| CN113338577A (en) * | 2021-05-25 | 2021-09-03 | 浙江原野建设有限公司 | Construction device for preventing hollowing and cracking of water-retaining bonding layer |
| CN114135068A (en) * | 2021-12-09 | 2022-03-04 | 上海隆振建筑工程股份有限公司 | Construction process of plastering mortar |
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| CN113338577A (en) * | 2021-05-25 | 2021-09-03 | 浙江原野建设有限公司 | Construction device for preventing hollowing and cracking of water-retaining bonding layer |
| CN114135068A (en) * | 2021-12-09 | 2022-03-04 | 上海隆振建筑工程股份有限公司 | Construction process of plastering mortar |
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Application publication date: 20171027 |