Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind of prefabricated sandwich heat-preserving wall.
The present invention adopts following technical scheme:
A kind of prefabricated concrete sandwich insulation body of wall, it comprises inner wall panel, side fascia, insulation layer, between described inner wall panel, described side fascia and described insulation layer, connects by connector, described inner wall panel and described side fascia adopt fiber enhanced foam concrete to make.
Preferably, described fiber enhanced foam concrete comprises the component of following parts by weight, cement 380-560 part, water 355-365 part, sand 380-540 part, industrial residue 120-240 part, light base-material 1.2-17 part, fiber 1-37 part, blowing agent 0.1-0.12 part.
Preferably, described industrial residue comprises a kind of or its combination in flyash, slag, silicon ash; Described light base-material comprises a kind of or its combination in expansion polystyrene or flyash floater; Described fiber comprises a kind of or its combination in natural or synthetic fibers; Described fibre length is 6-20mm.
Preferably, two ends, left and right, described T-shaped FRP connector top flange have notch and aperture, and lower abdomen has at least two notches.
Preferably, described T-shaped FRP connector is at engineering plastics shell parcel for insulation layer part.
Preferably, described insulation layer material comprises a kind of or its combination in organic material, inorganic material.
Preferably, in described inner wall panel body of wall with in described side fascia body of wall, be provided with steel mesh reinforcement.
In addition, the present invention also provides a kind of preparation method of described prefabricated concrete sandwich insulation body of wall, and it comprises the following steps:
(1) template construct of inner wall panel, side fascia;
(2) template of inner wall panel is installed, and the steel mesh reinforcement of default inner wall panel, and connector is stablized in colligation, coating engineering plastic casing on connector;
(3) build fiber enhanced foam concrete in inner wall panel template, until reach inner wall panel thickness;
(4) template of installation insulation layer, lays insulation layer;
(5) template of installation exterior wall, and the steel mesh reinforcement of default inner wall panel, connector is stablized in colligation, coating engineering plastic casing on connector;
(6) build fiber enhanced foam concrete in side fascia template, until reach side fascia thickness;
(7) heat-preserving wall end being coated with to plastering mortar seals;
(8) maintenance, the demoulding, makes finished product
With respect to prior art, the present invention has following beneficial effect:
1, fiber enhanced foam concrete for making uses the trade wastes such as flyash, silicon ash, slag, has reduced the cost of manufacture of body of wall, meets the social development demand of building energy conservation and environmental protection.
2, in foam concrete, add fiber, overcome that existing materials for wall fragility is large, toughness and the deficiency such as tensile property is poor, easy to crack, promoted the endurance quality of body of wall.
3, the ordinary concrete that the more existing body of wall of fiber enhanced foam concrete uses has the high-strength excellent properties of light weight, in guaranteed strength, has effectively alleviated the weight of body of wall.
4, between body of wall and insulation layer, form an entirety by connector, can play anti-shearing force effect, effectively improved the anti-seismic performance of body of wall.
5, adopt FRP material to make connector, solved the heat bridge problem that existing prefabricated sandwich wall adopts metal lattice work muscle connecting portion to produce, effectively promote the heat-insulating property of body of wall.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is explained in detail:
As shown in figure mono-, a kind of prefabricated concrete sandwich insulation body of wall described in present embodiment comprises inner wall panel 2, side fascia 1, insulation layer 3, connector 4, steel mesh reinforcement 5, engineering plastics shell 8, plastering mortar 9.
Wherein between side fascia 1, inner wall panel 2, be provided with insulation layer 3, side fascia 1, inner wall panel 2, insulation layer 3 connect by connector 4, and side fascia 1, inner wall panel 2 adopt fiber enhanced foam concrete to make.
The concrete formula of fiber enhanced foam and make inside and outside wall board performance parameter as following table (formula ratio: kg):
Table 1
Table 2
Fiber enhanced foam concrete preparation process comprises:
The first step, first by cement and sand dry mixing 1min, then add water (deduction foam is prepared water) stirs 2min, adds string to stir 5min;
Second step, when mortar stirs, mixes blowing agent and water in proportion and prepares foam with homogenizer;
The 3rd step, is added to the foam preparing in mortar and stirs together 2min, makes this fiber enhanced foam concrete.
Flyash wherein also can be slag, silicon ash etc., and granules of polystyrene can also be fine coal ball floater, and string also can be glass fiber, firm fiber, polyester fiber, aramid fiber etc., and selected fibre length is 6-20mm.
Test the cube specimen of preferred dimension as 100mm × 100mm × 100mm taking upper density, compressive strength, rupture strength, every group 3. while carrying out density measurement, shift to an earlier date 3d and take out sample, inserting continuous drying 3d in 120e baking oven then tests immediately. and wherein the test of compressive strength is carried out on the forcing press of 2000kN, and loading speed is 0.3 ~ 0.5MPa/s.
Insulation layer 3 materials adopt expanded perlite to make, insulation layer 3 materials can also adopt glass wool, polyphenyl plate, polyurethane foam etc. to make, insulation layer thickness can be selected according to user's request, but according to the regulation of " Code for design of masonry strucres " GB50003-2001, the sandwich thickness of sandwich wall is no more than 100mm.
Connector 4 can adopt different materials to make, preferably, described connector 4 adopts FRP to make, FRP has the advantages such as tensile strength is large, the low good heat preservation performance of thermal transmittance, anticorrosive, anti-fatigue performance is good, solve the heat bridge problem that existing prefabricated sandwich wall adopts metal lattice work muscle connecting portion to produce, in ensureing strength of wall body, promote the heat insulation effect of body of wall.Connector 4 can be designed to different structures simultaneously, and preferably, described connector 4 is T-shaped structure, and these two ends, left and right, T-shaped FRP connector top flange have notch 6 and aperture 7, and lower abdomen has at least two notches 6.
Engineering plastics shell 8 is for wrapping up the connector 4 by insulation layer part; play the effect of protection connector 4; the making material of described engineering plastics shell 8 adopts Merlon to make; this project plastic casing 8 can also adopt the ductility such as polyformaldehyde and obdurability good, the material that impact strength is high is made.
Steel mesh reinforcement 5 is placed among inner wall panel 2, side fascia 1, preferably, is placed on inner wall panel 2 axial planes, side fascia 1 axial plane, makes steel mesh reinforcement have better stressed effect.Described steel mesh reinforcement 5 passes through reinforcing bar binding with notch 6, aperture 7 on connector 4, and inner wall panel 2, side fascia 1, insulation layer 3 are formed to an entirety, has promoted the intensity of body of wall.
Plastering mortar 9 is placed in the two ends of above-mentioned formation body of wall, for this body of wall is sealed, avoids body of wall two ends to expose, and when ensureing wall thermal insulating effect, plays fireproofing function.
The present invention also provides a kind of preparation method of prefabricated thermal insulation sandwich wall, comprises the following steps:
1, the template construct of inner wall panel, side fascia.
2, the template of inner wall panel is installed and default interior embedded part: the template that inner wall panel is installed, lay steel mesh reinforcement, and notch, aperture and underbelly notch by two ends, left and right, connector top flange and reinforcing bar carry out colligation and fix, connector is defaulted in inner wall panel template, finally on connector, superscribe engineering plastics shell.
3, inner wall panel fortifying fibre foam concrete cast: move horizontally uniform distribution by row, the speed of manually getting off should be controlled evenly, driving movement should be steady, until the thickness of inner wall panel.
4, insulation layer is laid: insulation layer template is installed, and lays to insulation layer thickness.
5, the template of side fascia is installed and default interior embedded part: before the template of installation exterior wall, must adopt reinforcing bar location at the root of in-situ concrete wall or insulation layer outside, to prevent that described side fascia from bearing against insulation layer, the template of side fascia is placed on triangular platform frame, after making template in place, the fastening calibration of through-wall bolt, connecting must be tight, firmly, to prevent faulting of slab ends and spillage phenomenon, and and lay steel mesh reinforcement, by the notch at two ends, left and right, connector top flange, aperture and underbelly notch and steel mesh reinforcement carry out colligation to be fixed, connector is defaulted in side fascia template, finally on connector, superscribe engineering plastics shell.
6, side fascia pouring concrete: build fiber enhanced foam concrete in side fascia template, until reach side fascia thickness.
7, the body of wall end face brush plastering mortar of making is sealed.
8, maintenance, the demoulding, makes finished product.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is only limited to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.