CN103758250B - Air-entrained concrete self-insulation paste face brick wall and its construction method - Google Patents

Abstract

The invention belongs to the field of building walls, in particular to an aerated concrete block self-insulation pasting brick wall and a construction method. Aerated concrete block self-insulation paste face brick wall, the insulation layer is aerated concrete block self-insulation wall of mortar masonry; from inside to outside, it includes: interior surface layer, batch embedded treatment layer, aerated concrete masonry block wall, waterproof interface layer, anti-crack protective layer, brick bonding layer, and facing brick veneer layer. The wall integrates load-bearing and thermal insulation functions, realizing the same life span of thermal insulation and structure, simple construction, low cost, good fire resistance, and effectively reduces the heat loss of self-insulating walls in weak parts such as concrete beams, columns and shear walls. It solves the problem of condensation on the thermal bridge of the external wall, improves the impermeability of the air-entrained concrete and the construction method of the external finish layer, and solves the problem of poor freeze-thaw resistance of the aerated concrete, cracking of the finish layer, and easy falling off of the facing brick And other problems, suitable for building exterior wall insulation construction.

Description

Air-entrained concrete self-insulation paste face brick wall and its construction method

technical field

The invention belongs to the field of building walls, in particular to an aerated concrete block self-insulation pasting brick wall and a construction method.

Background technique

The aerated concrete block self-insulation wall integrates load-bearing and heat preservation functions. Compared with the external wall insulation technology that pastes polystyrene board, polyurethane and other organic insulation materials outside the base of the wall, it has simple construction, low cost, and fire resistance. , good durability, and the same lifespan as the building. However, there are still the following technical problems in the self-insulating walls of aerated concrete blocks:

1) Concrete components such as frame beams, columns, and shear walls are usually installed in the exterior walls of buildings. These parts have a large heat loss and are prone to form "thermal bridges" and condensation problems on the exterior walls;

2) The poor impermeability of aerated concrete leads to freeze-thaw damage of aerated concrete block walls in cold regions;

3) Engineering quality problems such as cracking of the facing layer and leakage of the wall are prone to occur at the junction of the self-insulating block wall and the concrete component;

4) Face bricks are used to face the outside of the aerated concrete block wall, and there are problems such as the face bricks are easy to fall off, the joints of the face bricks are easy to crack, the drawing strength is low, and the seismic performance is poor.

Due to the unresolved problems above, aerated concrete block self-insulation and pasting brick walls are seldom used in external wall insulation projects.

technical content

In order to solve the above-mentioned defects in the prior art, the present invention provides a self-insulating aerated concrete block wall and a construction method thereof, which utilizes the thermal performance of the aerated concrete block wall itself to meet the energy-saving design of the outer wall Require.

To achieve the above object, the present invention adopts the following scheme:

Aerated concrete block self-insulation paste face brick wall, the insulation layer is aerated concrete block self-insulation wall made of mortar; from inside to outside, it includes: interior surface layer, batch embedded treatment layer, aerated concrete masonry block wall, waterproof interface layer, anti-crack protective layer, brick bonding layer, and facing brick veneer layer.

Compared with the prior art, the present invention has the following beneficial effects:

1. Aerated concrete is a green, environmentally friendly and recyclable building material that does not contain chemical hazards and radioactive pollution. It has the advantages of wide source of production materials, stable materials, heat preservation, heat insulation, and sound insulation. Air-entrained concrete is an inorganic non-combustible material that meets Class A fire protection requirements and solves the fire hazards caused by the laying of polystyrene boards, polyurethane and other organic thermal insulation materials on the external thermal insulation wall.

2. The self-insulating wall of aerated concrete blocks integrates the functions of external wall enclosure and thermal insulation, which meets the energy-saving design requirements of the wall, realizes the same lifespan of thermal insulation and structure, and fundamentally solves the problem of external thermal insulation engineering and thermal insulation of external walls. Building service life out of sync problem. the

3. Aerated concrete blocks are light in weight, easy to process, and fast in construction. Compared with external wall insulation technology, there is no need for mortar leveling and insulation layer paste construction. There are fewer construction procedures, which can effectively reduce the weight of building walls and reduce Fundamental and structural investment; shorten the project capital turnover cycle, the comprehensive cost advantage is obvious.

4. Apply rubber powder polystyrene particle insulation slurry to concrete components such as frame beams, columns and shear walls, which effectively reduces the heat loss of beams, columns and shear walls, and solves the problem of external wall thermal bridges. Condensation problem.

5. The waterproof interface layer adopts a special waterproof interface agent for aerated concrete, which improves the impermeability of aerated concrete, prevents aerated concrete blocks from absorbing water from the mortar layer, and effectively avoids the occurrence of air-entrained concrete block walls in cold regions. The problem of freeze-thaw damage.

6. The anti-crack protective layer adopts polymer cement anti-crack mortar, and the alkali-resistant glass fiber mesh cloth is pressed into the anti-crack protective layer at the junction of the self-insulating block wall and the concrete component to improve the adhesion of the mortar and the wall. It solves the problems of hollowing, cracking and leakage of the facing layer at the junction of the block wall and the concrete component.

7. The bonding layer of the facing bricks adopts the facing brick adhesive, and the facing bricks adopt the facing bricks with a dovetail-shaped back groove on the back, which improves the bonding strength of the facing bricks and ensures that the facing bricks will not fall off due to external force; the flexible waterproof facing brick pointing material is used to solve the problem. It solves the problem of easy cracking of brick joints and improves the anti-seepage and waterproof ability of the wall.

8. The batch embedding treatment layer adopts polymer modified cement mortar with a thickness of 3-5mm, no need for cement mortar leveling, which adapts to the characteristics of precise size of aerated concrete blocks, meets the requirements for smoothness of the inner surface of the wall, and reduces The construction link is shortened and the construction period is shortened.

9. The present invention effectively reduces the heat loss of self-insulating walls of aerated concrete blocks in weak parts such as concrete frame beams, columns and shear walls, solves the problem of dew condensation at thermal bridge parts of external walls, and improves aeration The impermeability of the concrete and the construction method of the exterior surface layer solve the problems of poor freeze-thaw resistance of aerated concrete, cracking of the surface layer, and easy falling off of the facing brick, and are suitable for building exterior wall insulation construction.

Description of drawings

Fig. 1 is the structural representation of the self-insulation sticking face brick wall of aerated concrete block of the present invention;

Fig. 2 is the structure schematic diagram of the self-insulation sticking face brick wall of the aerated concrete block of the present invention;

In the figure, 1. Interior surface layer, 2. Batch embedding treatment layer, 3. Aerated concrete block wall, 4. Waterproof interface layer, 5. Anti-crack protection layer, 6. Face brick bonding layer, 7. Face brick Facing layer, 8. Rubber powder polystyrene particle insulation slurry, 9. Alkali-resistant glass fiber mesh cloth, 10. Frame beam, 11. Frame column, 12. Shear wall.

Detailed ways

As shown in Figure 1 and Figure 2, the self-insulating aerated concrete block wall with pasted face bricks includes: interior surface layer 1, batch embedding treatment layer 2, aerated concrete block wall body 3, waterproof Interface layer 4, anti-crack protection layer 5, face brick bonding layer 6, face brick veneer layer 7; the insulation layer is a self-insulating wall of aerated concrete blocks built with mortar.

The interior surface layer 1 is made of synthetic resin emulsion interior wall paint; the batch embedded treatment layer 2 is made of high molecular polymer modified cement mortar with a thickness of 3-5mm.

The blocks of the aerated concrete block wall 3 are B04 or B05 autoclaved sand aerated concrete blocks, and the thickness of the aerated concrete block wall is determined according to the energy-saving design requirements; the main The performance indicators are as follows: dry density ≤ 500kg/m ³ , thermal conductivity ≤ 0.14W/(m·K), compressive strength ≥ 2.0MPa; aerated concrete block wall 3 is built with adhesive mortar, and the thickness of the mortar joint is 3-5mm; the main performance indicators of the adhesive mortar are as follows: dry density ≤ 1800kg/m ³ , thermal conductivity ≤ 0.35 W/(m·K), compressive strength ≥ 5.0MPa, and tensile bonding when bonding with blocks Strength ≥ 0.2MPa.

Waterproof interface layer 4 adopts waterproof interface agent for air-entrained concrete. The main performance indicators of waterproof interface agent are as follows: impermeability pressure ≥ 0.4MPa, tensile bond strength ≥ 0.6MPa, shear bond strength ≥ 0.4MPa, shrinkage ≤ 0.5%.

The anti-crack protection layer 5 adopts polymer cement anti-crack mortar. The main performance indicators of polymer cement anti-crack mortar are as follows: compressive strength ≥ 5.0MPa, flexural strength ≥ 2.0MPa, bond strength ≥ 0.5MPa.

The tile adhesive layer 6 is made of tile adhesive, the main performance indicators of which are as follows: bonding strength ≥ 0.6MPa, folding ratio ≤ 3.0, linear shrinkage rate ≤ 0.3%.

The facing layer 7 of facing bricks adopts facing bricks with dovetail-shaped back grooves on the back, the area of facing bricks is ≤150cm ² , the thickness is ≤8mm, and the water absorption rate of facing bricks is ≤3%; Brick joints.

Frame beams 10, frame columns 11 and shear walls 12 and other concrete members are treated with rubber powder polystyrene particle thermal insulation slurry 8 for thermal insulation on the side of the concrete components such as the frame column 11 and shear wall 12. The thickness of the rubber powder polystyrene particle thermal insulation slurry is determined according to the energy-saving design requirements , and flush with the wall of the aerated concrete block; the main performance indicators of the rubber powder polystyrene particle insulation slurry are as follows: dry apparent density ≤ 250kg/m ³ , thermal conductivity ≤ 0.06W/(m·K), resistance Compressive strength ≥ 0.2MPa, linear shrinkage ≤ 0.3%, softening coefficient ≥ 0.5, compressive shear bond strength ≥ 0.05 MPa.

Alkali-resistant glass fiber mesh cloth is pressed into the anti-crack protective layer 5 at the junction of concrete components such as the aerated concrete block wall and the frame beam 10, frame column 11 and shear wall 12; the alkali-resistant glass fiber mesh cloth Main performance indicators: mass per unit area ≥ 290g/m ² , alkali-resistant tensile breaking strength (warp, weft) ≥ 1500N/50mm, alkali-resistant tensile breaking strength retention rate ≥ 75%, breaking elongation (warp, weft) to) ≤ 4.0%.

The construction method of the above-mentioned aerated concrete block self-insulation paste face brick wall comprises the following steps:

(1), after the construction of concrete components such as frame beam 10, frame column 11, and shear wall 12 is completed, the aerated concrete block wall 3 is built with adhesive mortar, and the thickness of the mortar joint is 3-5mm;

(2) Apply rubber powder polystyrene particle thermal insulation slurry 8 on the outside of the concrete members such as frame beam 10, frame column 11 and shear wall 12. The thickness of the first application is not more than 10mm, and the thickness of each subsequent application is no more than 10mm. More than 20mm, the interval is more than 24 hours, the total thickness is determined according to the energy-saving design requirements, and it is flush with the aerated concrete block wall;

(3), leveling the outer wall surface of the aerated concrete block wall 3, filling the gaps of the unfilled masonry mortar; brushing the special waterproof interface of 1~2mm thick aerated concrete to form the waterproof interface layer 4; the interface to be waterproofed After the layer 4 is dried, evenly scrape 3~6mm thick polymer cement mortar to form the interface layer 3 of the anti-crack protection layer. The polymer cement mortar needs to be constructed in layers; Alkali-resistant glass fiber mesh cloth 9 is pressed into the polymer cement mortar layer at the junction of concrete components such as the force wall 12; Use flexible facing brick jointing material for jointing treatment;

(4), leveling the inner wall surface of the aerated concrete block wall 3, and filling the gaps of unfilled masonry mortar; brushing polymer modified cement mortar to form batch embedding treatment layer 2; batch embedding treatment layer After drying, the paint is applied to form the interior surface layer 1.

Claims (6)

1. an air-entrained concrete building block self-heat conserving wall tile wall on heat, insulation layer is the air-entrained concrete building block self heat insulation wall that mortar is built by laying bricks or stones; It is characterized in that, comprise successively from inside to outside: interior finish coat, batch embedding processing layer, wall of aerated concrete block, waterproof boundary layer, anti-cracking protective layer, bonding layer of face brick, decorating surface brick layer;

Concrete component adopts adhesive powder-polystyrene granule thermal insulation mortar to be incubated processing by the side outside wall, and the thickness of adhesive powder-polystyrene granule thermal insulation mortar requires definite according to energy-saving design, and concordant with wall of aerated concrete block; The main performance index of adhesive powder-polystyrene granule thermal insulation mortar is as follows: dry apparent density≤250kg/m ³, coefficient of thermal conductivity≤0.06W/ (mK), compressive strength>=0.2MPa, linear shrinkage≤0.3%, coefficient of softening>=0.5, presses and cuts adhesion strength>=0.05MPa;

In the anti-cracking protective layer of wall of aerated concrete block and concrete component junction, be pressed into alkali resistant glass fibre open weave cloth; The main performance index of alkali resistant glass fibre open weave cloth: mass area ratio>=290g/m ², warp-wise, the alkaline-resisting tension failure brute force>=1500N/50mm of broadwise, alkaline-resisting tension failure strength retention>=75%, warp-wise, broadwise elongation at break are all≤4.0%;

Concrete component comprises Vierendeel girder, frame column and shear wall;

The building block of wall of aerated concrete block adopts B04 or B05 level steam pressure sand aerated concrete block, and the thickness of wall of aerated concrete block requires to determine according to energy-saving design; The main performance index of steam pressure sand aerated concrete block is as follows: dry density≤500kg/m ³, coefficient of thermal conductivity≤0.14W/ (mK), compressive strength>=2.0MPa; Wall of aerated concrete block adopts bonding mortar to build by laying bricks or stones, and gray seam thickness is 3-5mm; The main performance index of bonding mortar is as follows: dry density≤1800kg/m ³, coefficient of thermal conductivity≤0.35W/ (mK), compressive strength>=5.0MPa, adhesive strength>=0.2MPa stretches when bonding with building block.

2. air-entrained concrete building block self-heat conserving wall tile wall on heat according to claim 1, is characterized in that: interior finish coat adopts resin latex dope; Criticize embedding processing layer and adopt high molecular polymer modified cement mortar, thickness is 3-5mm.

3. air-entrained concrete building block self-heat conserving wall tile wall on heat according to claim 2, it is characterized in that: waterproof boundary layer adopts gas concrete waterproof interfacial agents, the main performance index of waterproof interfacial agents is as follows: impervious pressure >=0.4MPa, tensile bond strength >=0.6MPa, shear bonding strength >=0.4MPa, shrinkage≤0.5%;

Anti-cracking protective layer adopts anti-crack polymer cement mortar, and the main performance index of anti-crack polymer cement mortar is as follows: compressive strength >=5.0MPa, rupture strength >=2.0MPa, adhesion strength >=0.5MPa;

Bonding layer of face brick adopts binder for face brick, and the main performance index of binder for face brick is as follows: adhesion strength >=0.6MPa, backfin ratio≤3.0, linear shrinkage≤0.3%.

4. air-entrained concrete building block self-heat conserving wall tile wall on heat according to claim 3, is characterized in that: decorating surface brick layer adopts the face brick of the back side with dove-tail form back-trough, face brick area≤150cm ², thickness≤8mm, face brick water absorption rate≤3%; Face brick seam width>=5mm, with flexible water face brick pointing stuff filling brickwork joint.

5. the construction method of air-entrained concrete building block self-heat conserving wall tile wall on heat claimed in claim 4, comprises the following steps:

(1), after concrete component constructed, adopt bonding mortar to build wall of aerated concrete block by laying bricks or stones, gray seam thickness is 3-5mm;

(2), member is smeared adhesive powder-polystyrene granule thermal insulation mortar by wall outer side, first pass smearing thickness is not more than 10mm, and later every time smearing thickness is not more than 20mm, and interval is more than 24 hours, gross thickness is definite by energy-saving design requirement, and concordant with wall of aerated concrete block;

(3), metope outside wall of aerated concrete block is carried out to leveling, the not full mortar joint of building by laying bricks or stones fills up smooth; The brushing thick gas concrete special-purpose water-proof of 1～2mm interface forms waterproof boundary layer; After waterproof boundary layer is dry, evenly to scrape and smear the polymer cement mortar formation anti-cracking protective layer boundary layer that 3～6mm is thick, polymer cement mortar needs construction in layer; In the polymer cement mortar layer of blockwork and concrete component junction, be pressed into alkali resistant glass fibre open weave cloth; After crack-resistant layer polymer cement mortar is dry, with flexible face brick adhesive mortar binding face tile, and opposite brickwork joint carries out jointing processing with flexible face brick pointing stuff;

(4), metope inside wall of aerated concrete block is carried out to leveling, the not full mortar joint of building by laying bricks or stones fills up smooth; Brushing high molecular polymer modified cement mortar forms batch embedding processing layer; After batch embedding processing layer is dry, daub, finish coat in forming.

6. the construction method of air-entrained concrete building block self-heat conserving wall tile wall on heat according to claim 5, is characterized in that: concrete component comprises Vierendeel girder, frame column and shear wall.