Exterior wall steam-pressing aero-concrete self-insulation system is with material heat bridge process construction method
Technical field
The present invention relates to a kind of external wall construction technology, be specifically related to a kind of exterior wall steam-pressing aero-concrete self-insulation system with material heat bridge process construction method.
Background technology
Building energy consumption, communications and transportation energy consumption and industrial energy consumption are three large chief components of social total energy consumption.Wherein building energy consumption comprises: the constructing operation energy consumption used in energy and building use procedure in constructional materials producting energy, constructional materials transport energy, house building and maintenance process.In the Life cycle of building, the energy that constructional materials and building course consume generally only accounts for about 20% of the consumption of its total energy, and most of energy consumption occurs in the middle of building running.Therefore, building energy conservation is more and more subject to people's attention.
By the restriction of economy and historical conditions, building energy conservation has different implications and content in different social developments period.China to the definition of building energy conservation is at present: in the planning of building, design, newly-built, reconstruction, enlarging, transformation or use procedure in, perform energy conservation standard, adopt energy-saving technology, technique, equipment, material and product, improve thermal and insulating performance and heating, air conditioner refrigerating heating efficiency, strengthen the operational management of building energy consumption system, utilize regenerative resource, under the prerequisite ensureing indoor thermal environment quality, reduce heat supply, air conditioner refrigerating heats, illumination, the energy consumption of hot water supply, its implication is Appropriate application and effectively use the energy under construction, improve constantly the utilization ratio of the energy.
Building energy conservation is generally realized by following technological approaches:
(1) Technologies in Construction Planning Design is energy-conservation.Architect and energy analysis expert, environmentalist, Facilities Engineer, structural engineer closely cooperate, and utilize brand-new design concept to design low-energy building, zero energy consumption building and green building.Realize by measures such as choose reasonable building site, appropriate design external environment condition, appropriate design building shapes.
(2) building user energy consumption efficiency is improved.Here mainly refer to and to take measures in the heating, air-conditioning and ventilation, electrical lighting etc. of building, as employing energy-efficient lamp, effective warming air-conditioning system etc.Should take most economical of current China and effective measures be improve space enclosing structure material heat-insulating property, research and develop new economy and energy-conservation materials for wall.For the particular surroundings of hot-summer and cold-winter area, should Winter protection be considered, take into account summer again heat insulation, reduce the heating of building, cooling energy consumption.
(3) in architectural construction particularly space enclosing structure, conservation measures is taked.Architectural exterior-protecting construction comprises the parts such as exterior wall, roof, door and window, heat-barrier material, and its design has basic impact to building energy consumption.
Space enclosing structure comprises the concrete beam and column embedding body of wall, the concrete rib in walls and roofs plate, roof cornice, window frame and outside corner of wall etc., can form complicated two dimension and three-dimensional temperature field at these positions.Be referred to as " heat bridge " in thermal technology's code of China.
In " 12 " period, China has formulated energy conservation standard, and its target is that heating energy consumption is on the basis of local house universal design energy-conservation 65%.In order to realize this goal, architectural exterior-protecting construction design takes a series of conservation measures, and as adopted vacuum glass, Outer Wall is incubated, and basement roof pastes polyphenyl plate etc.Adopt these methods, decreased by the heat consumption of common space enclosing structure, but greatly increased by the heat consumption of heat bridge.This is because inside and outside employing exterior wall after Insulation, around heat bridge, the thermal resistance of space enclosing structure all increases, and the partial heat making to enter space enclosing structure around flows through from heat bridge.According to interrelated data analysis, in traditional architecture, heat bridge energy consumption accounts for about 5% of building total energy consumption, in energy saving building, then can reach about 25% by the energy consumption of heat bridge.
In the bodies of wall such as architectural structure system or brick wall, blockwork, composite wall and composite plate such as, building block mixed at brick and sheet material, heat bridge can account for 15% ~ 35% by area statistics.Because heat bridge position internal surface temperature is lower, when this place's temperature is lower than dewpoint temperature, steam will condense in its surface, and form condensation, the dust after this in air is easily stained with, and makes the blackening gradually of heat bridge portion faces, thus long bacterium, mouldy.Heat bridge produces relatively outstanding position, even can drop down water when cold, has a significant impact the life of people and health.
In sum, a kind of effective reduction heat bridge heat consumption and to improve the construction method of heat bridge position presentation quality most important.
Summary of the invention
The invention provides a kind of exterior wall steam-pressing aero-concrete self-insulation system with material heat bridge process construction method, large to solve building heat bridge position heat consumption at present, the problem of presentation quality difference.
The present invention program is as follows: exterior wall steam-pressing aero-concrete self-insulation system, with material heat bridge process construction method, comprises the following steps:
1) concrete base layer at heat bridge position is cleared up;
2) snap the line, carry out typesetting, and horizontal line and vertical line is put in segmentation according to designing requirement, the thin building block specification of steam-pressing aero-concrete and quantity;
3) the thin building block of steam-pressing aero-concrete is wetting, and tightr in order to make the concrete base layer of the thin building block of steam-pressing aero-concrete and heat bridge position fit, the thin building block of steam-pressing aero-concrete moisture content before stickup is 10 ~ 15%, and immersed depth is 8 ~ 10mm;
4) concrete base layer wetting at heat bridge position;
5) interface processing, the interfacial agents thick to the concrete base layer blade coating 2 ~ 4mm at heat bridge position, carries out interface processing;
6) the thin building block of steam-pressing aero-concrete is pasted, adopt the thin building block of cementing agent blade coating steam-pressing aero-concrete, cementing agent blade coating thickness is 8 ~ 9mm, the thin building block of steam-pressing aero-concrete is pasted from bottom to top by the exterior wall steel concrete lines location at every floor plate absolute altitude place, and lateral arrangement, in order to more attractive in appearance, the thin building block of steam-pressing aero-concrete of upper and lower row is staggered mutually;
7) check planeness and the mortar joint of the thin building block of steam-pressing aero-concrete, with jointing, wipe clean surface;
8) maintenance is carried out to the thin building block of the steam-pressing aero-concrete posted;
9) in the thin building block of the steam-pressing aero-concrete posted, completely spread gauze wire cloth, the lap length of gauze wire cloth is more than or equal to 150mm;
10) secondary interface process, the concrete base layer at wetting heat bridge position, makes its moisture content be 15 ~ 17%, carries out interface processing to the thick interfacial agents of gauze wire cloth surface blade coating 3 ~ 5mm;
11) cement mortar construction;
12) finished product protection, commute pollution place adopts bar cloth to cover.
Beneficial effect of the present invention: the present invention is by being anchored at outside the concrete base layer of architectural exterior-protecting construction heat bridge by thin for steam-pressing aero-concrete building block stickup, as the insulation layer of heat bridge position concrete base layer, the coefficient of thermal conductivity of this insulation layer is less than 0.12, cubic compressive strength is more than or equal to 2.8MPa, this insulation layer has excellent heat insulation property, durability, weather resisteant, noninflammability and safety, through the heat bridge position of this PROCESS FOR TREATMENT, meet building energy conservation requirements, and the presentation quality of building heat bridge position can be kept for a long time.
Through the insulation layer that this method is formed, within 25 years, compare with exterior wall bonding powder polystyrene granule insulating system and exterior wall expansion polyphenyl plate thin-coat plaster heat insulation system reasonable using period, the reasonable using period of insulation layer can be made to bring up to more than 50 years service life of design of building structures, not only solving other heat insulating material durability can not with the consistent problem of Building life cycle, also overcomes other heat insulating material fire lines and the poor shortcoming of safety simultaneously.
The scope of application: this construction method is applicable to the exterior wall heat-preserving systems such as multilayer, high level and high-rise house, office, commercial building.
Further, in step 6), form horizontal mortar joint and vertical mortar joint between the thin building block of each steam-pressing aero-concrete, horizontal mortar joint full degree of mortar at bed joint is not less than 90%; Vertical mortar joint full degree of mortar at bed joint is not less than 80%.Thickness of mortarat bed joint is 8 ~ 12mm; Vertical mortar joint width is 6 ~ 10mm.
Further, in step 9), gauze wire cloth is hot-galvanized steel silk screen, hot-galvanized steel silk screen is smoothly clean and tidy, even structure is firm, good integrity, and gauze wire cloth and the thin building block of steam-pressing aero-concrete are fixed on the concrete base layer of heat bridge by plastic expansion anchoring bolt, anchoring is firm, and the distance between each plastic expansion anchoring bolt is less than or equal to 400mm.
Further, in step 11), cement mortar construction technology is: first smear first cement mortar bottoming plucking, after first bottoming mortar completes, wetting first bottoming mortar, smear the bottoming of second cement mortar, mark track, after second bottoming mortar completes, wetting second bottoming mortar, smear the 3rd road cement mortar as surface layer, after surface layer mortar has been constructed, water seasoning, methocel solution and polypropylene fibre solution is comprised in cement mortar, can prevent from building the plaster cracking outside the insulation layer of heat bridge position, the problems such as seepage, greatly improve the safety of heat bridge position insulation layer and the cracking resistance of durability and floated coat and anti-permeability performance.
Further, the length of the thin building block of steam-pressing aero-concrete is 400mm, and wide is 300mm, and thick is 60mm, and material is comparatively light, and is beneficial to block and cuts the thin building block of steam-pressing aero-concrete.
Further, in order to meet the requirements of this construction method, the cementing agent that the present invention uses and interfacial agents are polymer dry powder mortar.Polymer dry powder mortar water resistance >=0.5 MPa, hot strength >=0.6 MPa, compression shear strength >=0.6 MPa, freeze-thaw resistance >=0.5.
Accompanying drawing explanation
Fig. 1 is the process chart of the embodiment of the present invention;
Fig. 2 is the stickup typesetting figure of the thin building block of steam-pressing aero-concrete in the embodiment of the present invention;
Fig. 3 is the layout schematic diagram of the thin building block of steam-pressing aero-concrete in the embodiment of the present invention, gauze wire cloth and plastic expansion bolt;
Fig. 4 is the heat bridge position constructional drawing after embodiment of the present invention construction.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
As shown in Figure 1, the present embodiment construction method step is as follows:
One, base cleaning
The floating sand on cleaning concrete base layer surface, heat bridge position and chip, block up the screw hole through walls closing template, build outrigger reserved opening with the pea gravel concreten of same wall concrete class with blowing agent.The irregular concrete wall in local or beam concrete are picked and beats, and carry out levelling with 1:1 cement fish rice stone to metope recess.
Two, snap the line
Carry out typesetting according to designing requirement, the thin building block specification of steam-pressing aero-concrete and quantity, and horizontal line and vertical line are put in segmentation.Should accomplish to lead to line up and down for post, wall, beam being pasted the thin building block of gas concrete, ensureing verticality and the planeness of metope after pasting.
Three, the thin building block of gas concrete soaks
The thin building block sticking construction of exterior wall gas concrete a few days ago, is determined special messenger and is watered the thin building block of water-wet gas concrete, and ensure that the thin building block of gas concrete pastes front moisture control in the scope of 10 ~ 15%, immersed depth is preferably 8 ~ 10mm.
Four, the concrete base layer at heat bridge position soaks
Exterior wall gas concrete thin building block sticking construction the previous day, determine the fully wetting concrete base layer of special messenger, remove metope dust.
Five, an interface processing
External Wall concrete base layer completely scrapes interfacial agents, carries out interface processing, and its thickness is 2mm.From before the thin building block of each stickup gas concrete, completely should scrape interfacial agents, area should be too large, meets the area pasted for 2 hours and be advisable.
Six, paste the thin building block of steam-pressing aero-concrete, namely paste Aerated Concrete block.
The thin building block specification of steam-pressing aero-concrete is 400mm × 300mm × 60mm.Adopt adhesive special completely to scrape in the thin building block of gas concrete, requirement is scraped full, smooth, and adhesive thickness is 8mm, and during beating, power is moderate.Be illustrated in figure 2 the typesetting figure of the thin building block of the present embodiment steam-pressing aero-concrete, wherein, the Reference numeral in accompanying drawing is: the concrete lines 2 of the thin building block of steam-pressing aero-concrete 1 and the thin building block 1 of support steam-pressing aero-concrete.
The thin building block of steam-pressing aero-concrete is pasted by the exterior wall concrete at every floor plate absolute altitude place chooses ear position, and from bottom to top, horizontal paving in the horizontal direction, the thin building block of the gas concrete often arranged 1/2 plate that mutually staggers is long.At rotation angle position, arrange the vertical abutment joint interconnection between Autoclaved aerated concrete blocks up and down, do not allow to occur straight joint at rotation angle position.Mortar joint is smooth vertical and horizontal, and mortar is full, and horizontal mortar joint full degree of mortar at bed joint is not less than 90%; Perpends full degree of mortar at bed joint is not less than 80%.Thickness of mortarat bed joint is 8 ~ 12mm; Perpends width is 6 ~ 10mm.
The dry density of the thin building block of steam-pressing aero-concrete and compressive strength
The drying contraction of the thin building block of steam-pressing aero-concrete and coefficient of thermal conductivity
Seven, after reaching certain hour, check adjustment Autoclaved aerated concrete blocks planeness and mortar joint, with jointing, wipe clean surface.
Eight, after 24 hours, maintenance is carried out to the Autoclaved aerated concrete blocks posted.
Nine, arrangement diagram as shown in Figure 3, the Reference numeral in accompanying drawing is: the thin building block of steam-pressing aero-concrete 1, the concrete lines 2 supporting the thin building block 1 of steam-pressing aero-concrete, gauze wire cloth 3 and plastic expansion bolt 4.The thin building block of the steam-pressing aero-concrete posted completely spreads hot-galvanized steel silk screen: for ensureing workmanship and use safety, completely spread 0.9 × 12.5 × 12.5 hot-galvanized steel silk screens in insulating layer of external wall Autoclaved aerated concrete blocks basic unit.Adopt the drill bit of electric hammer diameter 10mm to bore the dark hole of 120mm on thin piece of gas concrete, plastic expansion anchoring bolt is sent in hole, tightens holdfast with screwdriver, fixing gauze wire cloth, its spacing must not be greater than 400mm, and gauze wire cloth is tightened, and lap length is more than or equal to 150mm.
Ten, according to design thickness, External Wall leveling layer carries out hanging vertically, rule is looked for by cover side.
Ten first and second interface processing: fully wetting basic unit makes moisture content reach 15 ~ 17%, completely scrapes the thick special interface agent of 3mm carry out interfacial agents process to Autoclaved aerated concrete blocks basic unit gauze wire cloth surface.
12, cement mortar construction
First smear first 1:2 cement mortar bottoming plucking, plucking adopts horizontal mode, and its thickness is 9mm; After first bottoming mortar completes 6 hours, wetting first bottoming mortar, carry out the bottoming of second 1:2 cement mortar, mark track, its thickness is 9mm; After second bottoming mortar completes 6 hours, wetting second bottoming mortar, carry out the construction of 1:2 cement screedn, strike off with 2.5m aluminium alloys chi a tree, used in making timber for boats and sand flat whole with wooden sand plate, THICKNESS CONTROL is 7mm.Methocel solution (cement: river sand: methocel solution=1:2:0.33) and polypropylene fibre is added in cement mortar.Methocel solution ratio is that 150kg water adds 1kg methylcellulose, and every cubic meter of water cement mortar adds 1kg polypropylene fibre.Surface layer mortar takes water seasoning after having constructed 24 hours, and maintenance number of days is no less than 7 days.
13, finished product protection: protect the Autoclaved aerated concrete blocks pasted and cement screedn, the place of determining special messenger's nurse and easily pollution adopts color-bar cloth to cover.
The insulation layer formed by this construction technology has excellent heat insulation property, durability, weather resisteant, noninflammability and safety; Floated coat has stronger crack resistance and impermeability; Aerocrete as heat isolating material lightweight used, environmental protection, easy to make, build and cut easily, and price is lower, is easy to control cost; Construction technology is simple, convenient construction, and because single-block area is larger, speed of application is also than comparatively fast.
The cementing agent used in the present embodiment and interfacial agents are polymer dry powder mortar.Polymer dry powder mortar water resistance >=0.5 MPa, hot strength >=0.6 MPa, compression shear strength >=0.6 MPa, freeze-thaw resistance >=0.5.
As shown in Figure 4, be the heat bridge position constructional drawing after the present embodiment construction, the present embodiment is to build rod structure, and the Reference numeral in accompanying drawing is respectively: steel concrete lines 2, plastic expansion bolt 4, post 5, floor 6, exterior wall dividing joint 7.Heat bridge position structure on the present embodiment post is followed successively by: concrete base layer; The interfacial agents that 2mm is thick; The cementing agent that 8mm is thick; The thin building block layer of the steam-pressing aero-concrete that 60mm is thick; Steel screen layer; The thick interfacial agents of 3mm; The cement and sand screed that 9mm is thick; 9mm solid cement mortar surface layer; The cement screedn that 7mm is thick.
Above-described is only the preferred embodiment of the present invention; should be understood that; for a person skilled in the art; under the prerequisite not departing from structure of the present invention; some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.