CN215670189U

CN215670189U - Ultra-thin adiabatic vacuum insulation structure of outer wall STP

Info

Publication number: CN215670189U
Application number: CN202121486589.2U
Authority: CN
Inventors: 穆铭; 王燕; 张春艳; 杜怡
Original assignee: China Construction Second Engineering Bureau Co Ltd; Fourth Construction Engineering Co Ltd of China Construction Second Engineering Bureau Co Ltc
Current assignee: China Construction Second Engineering Bureau Co Ltd; Fourth Construction Engineering Co Ltd of China Construction Second Engineering Bureau Co Ltc
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2022-01-28
Anticipated expiration: 2031-07-01

Abstract

The utility model discloses an external wall STP ultrathin heat insulation vacuum heat preservation structure, which comprises: the outer wall body, bracket, STP heated board, first rendering coat mortar layer, alkali-resistant glass fiber net, crab-bolt and second rendering coat mortar layer. The outer wall body includes the wall body and connects the basic unit of making level on the wall body. The bracket is installed on the outer wall body. The STP heated board covers on outer wall body, and at least part STP heated board supports on the bracket. The first surface coating adhesive layer covers the STP heat-insulation board. Alkali-resistant glass fiber net connects on first rendering coat mortar layer, and the crab-bolt passes alkali-resistant glass fiber net and each STP heated board's gap, connects on the outer wall body to fixed alkali-resistant glass fiber net and STP heated board. The second rendering coat mortar layer is connected on the first rendering coat mortar layer and covered with the alkali-resistant glass fiber net. This application has adopted the STP heated board as outer wall insulation material, has improved the construction structure in the work progress, has formed the ultra-thin adiabatic vacuum insulation structure of complete outer wall STP, has improved the heat preservation effect of building.

Description

Ultra-thin adiabatic vacuum insulation structure of outer wall STP

Technical Field

The utility model relates to the technical field of building construction, in particular to an external wall STP ultrathin heat insulation vacuum insulation structure.

Background

In the world, the requirements for energy conservation and environmental protection are continuously improved, the demand for novel building materials is increasingly strengthened, the development of heat insulation is the fastest, and the outer wall heat insulation structure systems are various in types and different in forms, and the performance control and construction エ technology of the outer wall heat insulation structure systems also draws more and more attention of people. The existing external wall insulation board generally adopts a common polystyrene board, and the insulation effect of the polystyrene board is not outstanding.

The existing STP insulation board has much stronger insulation effect than that of the common polystyrene board. But the application of STP heated board on the outer wall is few, and prior art has few corresponding construction structures, and the STP heated board is because thickness is thin (3.0 cm), can not cut and crooked, and receives the destruction easily and cause gas leakage hollowing. Therefore, the requirements on the construction quality of each procedure of the external wall heat insulation are higher.

In view of the above, the present invention is particularly proposed.

SUMMERY OF THE UTILITY MODEL

The utility model provides an external wall STP ultrathin heat insulation vacuum heat insulation structure, which is used for simplifying construction procedures and improving the heat insulation effect of a building.

In order to realize the purpose of the utility model, the utility model provides the following technical scheme:

the utility model provides an ultra-thin adiabatic vacuum insulation structure of outer wall STP, includes:

the outer wall body comprises a wall body and a leveling base layer connected to the wall body;

a bracket mounted on the outer wall body;

the STP heat insulation plate covers the outer wall body, and at least part of the STP heat insulation plate is supported on the bracket;

the first surface-coated mortar layer covers the STP heat-insulation board;

the alkali-resistant glass fiber net is connected to the first surface sizing agent layer;

the anchor bolt penetrates through the gap between the alkali-resistant glass fiber net and each STP heat-insulation board and is connected to the outer wall body so as to fix the alkali-resistant glass fiber net and the STP heat-insulation boards;

and the second rendering coat mortar layer is connected to the first rendering coat mortar layer and covers the alkali-resistant glass fiber net.

Optionally, the outer wall body comprises a first wall surface and a second wall surface which are vertically connected, and an internal corner and an external corner are formed between the first wall surface and the second wall surface;

the STP heat-insulation board comprises two large faces and a thickness end face positioned between the two large faces, and in the two STP heat-insulation boards on the two sides of the internal and external corners, the thickness end face of one STP heat-insulation board is attached to the large face of the other STP heat-insulation board.

Optionally, the STP insulation boards include a first STP insulation board and a second STP insulation board, the first STP insulation board and the second STP insulation board have different lengths, and the first STP insulation board and the second STP insulation board are respectively arranged at the same horizontal height of the edges of the two sides of the internal corner and the external corner;

in the longitudinal direction of any side edge of the internal and external corners, the first STP heat-insulation plates and the second STP heat-insulation plates are alternately arranged one by one.

Optionally, a gap is formed between two adjacent STP insulation boards, vitrified micro-bead mortar is filled in the gap, and the surface of the vitrified micro-bead mortar is flush with the surface of the STP insulation board.

Optionally, a heat preservation slurry layer is arranged at the edge pressing position of the STP heat preservation plate on the outer wall body, and the surface of the heat preservation slurry layer is flush with the surface of the STP heat preservation plate.

Optionally, the crab-bolt includes nail post and helmet, the nail post inserts the outer wall body, the helmet is spacing in alkali-resisting glass is online.

Optionally, in the longitudinal direction of the outer wall body, the width edge of the STP insulation board on the upper layer intersects with the length edge of the STP insulation board on the lower layer, the nail column is arranged at the intersection point position of the width edge and the length edge, and the protective cap supports three adjacent STP insulation boards simultaneously.

Optionally, the external wall STP ultrathin heat insulation vacuum insulation structure further comprises a corner protector, wherein the corner protector covers a part of the external wall body with a corner; the part with the corner comprises a male corner and a female corner of the outer wall body.

Optionally, a gap between two adjacent STP insulation boards is not greater than 20 mm.

Optionally, the alkali-resistant glass fiber web has a specification of not less than 160 g/square meter.

By adopting the technical scheme, the utility model has the following beneficial effects:

this application has adopted the STP heated board as outer wall insulation material, has improved the construction structure in the work progress, has formed the ultra-thin adiabatic vacuum insulation structure of complete outer wall STP, has improved the heat preservation effect of building.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model to its proper form. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic perspective view of an external wall STP ultrathin heat insulation vacuum insulation structure provided in an embodiment of the present application;

fig. 2 is a partial sectional view of the external wall STP ultra-thin thermal insulation vacuum insulation structure provided by the embodiment of the application.

In the figure, 1, an outer wall body; 11. a first wall surface; 12. a second wall surface; 13. the internal corner and the external corner; 2. STP heated board; 21. a first STP insulation board; 22. a second STP insulation board; 23. large surface; 24. a thickness end face; 3. an anchor bolt; 4. and (6) protecting the corner.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 and 2, an embodiment of the present application provides an external wall STP ultra-thin thermal insulation vacuum insulation structure, including: the outer wall body 1, bracket, STP heated board 2, first rendering coat mortar layer, alkali-resistant glass fiber net, crab-bolt 3 and second rendering coat mortar layer. The outer wall body includes the wall body and connects make level basic unit on the wall body, the bracket is installed on the outer wall body 1. The STP heat-insulation plate covers the outer wall body 1, and at least part of the STP heat-insulation plate is supported on the bracket. The first surface coating adhesive layer covers the STP heat-insulation plate. The alkali-resistant glass fiber net is connected to the first surface sizing layer. The anchor bolt 3 penetrates through the gap between the alkali-resistant glass fiber net and each STP heat-insulating plate and is connected to the outer wall body 1 so as to fix the alkali-resistant glass fiber net and the STP heat-insulating plate 2. And the second rendering coat mortar layer is connected to the first rendering coat mortar layer and covers the alkali-resistant glass fiber net.

The STP heat-insulating board is a novel external wall heat-insulating material which is started in recent years, and compared with the traditional polyphenyl board, polyurethane foam and inorganic heat-insulating material, the STP heat-insulating board has the advantages of A-level fire prevention, excellent and stable heat-insulating effect, no water absorption, rain prevention, moisture prevention, green, environmental protection and the like. But the STP heated board is because thickness is thin (3.0 cm), can not cut and crooked, and receives the destruction easily and cause gas leakage hollowing. Therefore, the requirements on the construction quality of each procedure of the external wall heat insulation are higher, the combustion performance of the external wall STP ultrathin heat insulation vacuum heat insulation structure is A grade, and the external wall STP ultrathin heat insulation vacuum heat insulation structure can be used for external wall heat insulation of various civil buildings.

The outer wall body 1 comprises a first wall surface 11 and a second wall surface 12 which are vertically connected, wherein a concave-convex angle 13 is formed between the first wall surface 11 and the second wall surface 12. The STP heat-insulation board comprises two large faces 23 and a thickness end face 24 positioned between the two large faces 23, and in the two STP heat-insulation boards on the two sides of the internal and external corners 13, the thickness end face 24 of one STP heat-insulation board is attached to the large face 23 of the other STP heat-insulation board. Therefore, the splicing seams of the two STP heat-insulation plates on the two sides of the internal corner 13 and the external corner 13 are staggered with the edges of the internal corner 13 and the external corner 13.

The STP heated board includes first STP heated board 21 and second STP heated board 22, first STP heated board 21 with second STP heated board 22's length is different, the same level at 13 both sides borders in negative and positive angle sets up respectively first STP heated board 21 and second STP heated board 22. In the longitudinal direction of any side edge of the internal and external corners 13, the first STP heat insulation board 21 and the second STP heat insulation board 22 are alternately arranged one by one.

In this embodiment, through set up the different first STP heated board 21 of size and second STP heated board 22 at 13 both sides borders in negative and positive angle, then on the bulk surface of first wall 11 and second wall 12 be non-negative and positive angle 13 positions, set up unidimensional STP heated board, then along the direction of height, the width limit of upper story STP heated board is mutually perpendicular with the length limit of lower story STP heated board.

A gap is formed between every two adjacent STP heat insulation boards, vitrified micro-bead mortar is filled in the gap, and the surface of the vitrified micro-bead mortar is flush with the surface of the STP heat insulation board. And a heat-insulating slurry layer is arranged at the edge pressing position of the STP heat-insulating plate 2 on the outer wall body 1, and the surface of the heat-insulating slurry layer is flush with the surface of the STP heat-insulating plate 2.

The anchor bolt 3 comprises a nail column and a protective cap, the nail column is inserted into the outer wall body 1, and the protective cap is limited on the alkali-resistant glass fiber net. The protective cap has a limiting effect on the alkali-resistant glass fiber net and the STP heat-insulating plate.

The edge along in the vertical of external wall 1, the width limit of the STP heated board on upper strata and the length limit of lower floor STP heated board intersect, the nail post sets up the nodical position on width limit and length limit, the helmet supports adjacent three STP heated board simultaneously.

The external wall STP ultrathin heat insulation vacuum heat insulation structure further comprises a corner protector 4, wherein the corner protector 4 covers the part with the corner on the external wall body 1, and the part with the corner comprises a male corner 13 and a female corner 13 of the external wall body 1.

In order to improve the heat preservation effect, the gap between two adjacent STP heated boards is not more than 20 mm.

The alkali-resistant glass fiber net has the specification of not less than 160g per square meter. The alkali-resistant glass fiber web meets the structural strength requirement.

The application discloses ultra-thin adiabatic vacuum insulation structure of outer wall STP's work progress as follows:

the method comprises the following steps: treating a base layer wall;

1. the mortar on the wall surface of the main body structure and the wood-plastic plate on the original structure are cleaned, and sharp protrusions such as nails and iron wires are avoided. The heat preservation plate is prevented from being punctured, the air inlet of the vacuum layer is caused, and the heat preservation effect is lost.

2. The mortar joint of the outer wall masonry is tightly plastered, holes such as scaffold holes are tightly blocked by expanded fine aggregate concrete (the outer side surface is coated with waterproof paint for three times), and the outer wall leakage phenomenon is prevented.

3. And paying off the outer wall, and checking the vertical flatness of the large wall surface, the straightening of the large external corner and the straightening of the outer window line to find out problems and treat the problems as soon as possible.

4. The rainwater pipe clamp, the embedded part, the bracket and the equipment wall penetrating pipe which extend out of the outer wall surface are installed in place, the thickness of the outer wall heat insulation layer is reserved, and necessary rust prevention treatment is carried out.

5. The thickness of the heat-insulating layer is reserved at the joint of the door and window frame and the wall body, after the window frame is installed, the gap between the window frame and the wall body is tightly filled, and the window frame is well protected.

6. The building and the wall surface are seriously inspected and examined in the field before the heat preservation construction.

Step two: hanging a vertical and elastic control line;

before the STP heat-insulating plate is constructed, vertical datum lines are hung at large angles of an outer wall of a building and other necessary positions according to the technical requirements of a building elevation and the heat insulation of the building, a transverse datum line and a vertical datum line are firstly determined during construction, a horizontal line is hung at a proper position of each floor, and a datum steel wire is hung at a large external corner so as to control the verticality and the flatness of the plate surface.

2. And horizontal and vertical control lines, telescopic stitches, decorative stitches and the like of the outer door and window are popped out from the wall surface.

Step three: leveling the outer wall and installing a bracket;

1. the mortar for plastering adopts a formula of 1: 3, cement mortar is constructed from top to bottom. The vertical deviation between layers is not more than 5mm, the flatness is not more than 5mm, and the full height is not more than 20 mm. And (5) hanging a steel wire mesh on the part with the plastering thickness exceeding 35 mm. In order to ensure firm bonding of the STP heat-insulating plate, the surface of the plastering layer does not need to be calendered and is preferably a pitted surface, but the sharp protrusions which can damage the heat-insulating plate are avoided. After plastering is finished, the pasting is not suitable for immediate pasting, and watering and maintenance are needed for 3-4 days.

2. The ink line used for the outer wall of one layer pops out a horizontal line, aluminum alloy brackets are installed along the horizontal line, the aluminum alloy brackets are arranged in a circle-crossed mode and are arranged in a through-length mode, a first layer of STP heat insulation boards is pasted above the brackets, and one bracket is installed on each two layers above seven layers of the building.

Step four: gluing an adhesive on the STP heat-insulating plate;

1. the preparation method is carried out on site strictly according to the mixture ratio and the preparation process provided by a supplier, and the preparation is carried out according to the water-cement ratio of 1: 5.

The stirred adhesive should be used after standing for 10 minutes. The prepared adhesive is strictly prohibited from being added with water for the second time and stirred.

2. The preparation should not be excessive, and the product can be used up within 3h or within the time specified in the product specification according to different environmental temperature conditions.

Step five: pasting an STP heat-insulation plate;

according to "STP heated board platoon and crab-bolt arrange the schematic diagram" construction, paste the STP heated board and still should accord with following requirement:

1) the pasting sequence is to construct along the horizontal line from bottom to top, and the internal and external corners are pasted firstly. The STP insulation board on the big wall face and the internal and external corners carries out the fissure of displacement construction, and the bonding must be firm between STP insulation board and the basic unit and between each layer, should not delaminating, hollowing and fracture.

2) The sticking mode adopts a strip sticking method, the adhesive is pulled out of the adhesive strip on the STP heat-insulating plate by a sawtooth-shaped spatula, and when the STP heat-insulating plate is stuck on a wall, the mortar strip is parallel to the ground. The bonding area is not less than 70% of the area of the STP heat-insulation board.

3) The STP heat-insulating board is uniformly extruded when being bonded, can be fixed by lightly pressing with hands, strictly controls the flatness and the verticality of the board surface, carries out flattening inspection by a guiding rule with the length not less than 2m, and can timely clear the adhesive extruded around the board.

4) The seam between the periphery of each STP heat-insulation plate and the adjacent STP heat-insulation plate is not larger than 20 mm.

5) The construction of window side, air conditioner baffle and canopy department: the heat preservation of the available vitrified micro bubbles is carried out on a window, an air conditioner partition plate, a rain shed and the like due to variable sizes, the vitrified micro bubbles are directly coated for construction after a base layer is leveled, the vitrified micro bubbles can be coated once when the thickness of the vitrified micro bubbles is less than or equal to 2cm, the vitrified micro bubbles must be constructed in different times for preventing cracking when the thickness of the vitrified micro bubbles is more than 2cm, the thickness of each construction cannot exceed 2cm, and the next construction can be carried out when the surface of the first time is not dry and can be touched.

6) The rainwater pipe clamp, the wall bushing and other parts which are less than 300mm wide and cannot be pasted by the STP heat-insulation board are constructed by heat-insulation mortar.

7) The row board of the peripheral STP heated board in outer window entrance to a cave can select to arrange 300mm wide STP heated board at the peripheral door window entrance to a cave as required to can reserve the crab-bolt identification member between the board, reserve back crab-bolt identification member hole and need to fill with the foaming adhesive tape and seal with the building sealant after the outer veneer is accomplished.

Step six: performing seam treatment;

the gap between the boards is smoothed by vitrified microsphere mortar, and the vitrified microsphere mortar must be leveled with the board surface of the STP heat-insulation board so as to ensure the flat surface. Before the process is carried out, whether the STP heat-insulation board is firmly adhered or not needs to be checked, and loose STP heat-insulation boards need to be taken down and re-adhered. The edge pressing position of the STP heat-insulating plate is filled and leveled with heat-insulating slurry, and special plastering mortar is strictly forbidden to be directly filled. When the joints are filled, the sealing edges are required to be completely pressed into the plate joints, the upper plate sealing edge presses the lower plate sealing edge and the plastering strength is carefully mastered, so that the STP insulation plate is prevented from being damaged.

Step seven: paving a first surface coating adhesive layer and an alkali-resistant mesh cloth;

1. after the STP heat preservation plate seam is processed, standing for more than 12 hours, and then scraping and smearing special plastering mortar. Before the surface of the wall is covered, the whole wall surface is integrally checked, whether phenomena such as air leakage, hollowing and the like exist is observed, and the anti-crack mortar surface is constructed in time after the inspection is qualified.

2. When in plastering, a first layer of plastering mortar with the thickness of 2-3 mm (facing brick facing 3-4 mm) is uniformly smeared on the surface of the STP heat-insulating board by using a trowel, and the alkali-resistant glass fiber net is immediately pressed into the plastering mortar, so that the alkali-resistant glass fiber net is preferably covered, the contour is slightly seen, and the surface is required to be smooth and have no wrinkles.

3. In order to ensure the straight and straight external corner and moulding line of the building, the glass fiber net corner protector, the floating window plate, the upper window and other parts needing water dripping are additionally provided with a finished product of PVC olecranon.

4. The four corners of the door and window opening are additionally provided with additional gridding cloth with the length of 300mm and the width of 200mm along the direction of 45 degrees in advance.

5. Cutting and bending are strictly forbidden in STP heat-insulating board construction, and heavy objects are knocked and sharp objects are pierced.

Step eight: mounting an anchor bolt;

(1) and (4) drilling holes in the holes of the anchor bolt identification part by using an impact drill according to the design requirement, and installing the anchor bolt. The drill bit of the percussion drill is required to be in contact with the identification piece in a reduced mode during drilling, so that the influence of long-time vibration of the drill bit on the vacuum degree of the vacuum insulation plate is avoided. The impact drill is strictly forbidden to drill holes on the vacuum insulation panel.

(2) The number of the anchor bolts per square meter is not less than 4.

(3) Effective anchoring depth of anchor bolt: not less than 30mm in the concrete-based layer, not less than 50mm in aerated concrete block brickwork.

Step nine: mounting a corner protector;

1. after the STP heat-insulation board is sewn, standing for more than 12 hours, scraping and smearing surface mucilage, protecting the internal and external corners, the lower window opening and the side window opening by adopting PVC corner protectors, and ensuring that the internal and external corners and the window opening are straight and attractive by adopting PVC water dripping lines.

2. After the first plastering mortar is finished at the male and female corners of the outer wall, the PVC angle bead and the PVC water drip line are adhered to the wall according to the hanging line and are uniformly extruded within the operable time range of the plastering mortar, the mesh on the angle bead is pressed into the mortar at the same time, the plastering mortar is extruded from the holes of the angle bead, and then the redundant mortar is scraped.

Step ten: laying a second rendering coat mortar layer;

and when the first plastering mortar layer is slightly dry and hard to touch, a second plastering mortar layer is plastered, wherein the thickness is 1-2 mm (facing brick facing surface is 2-3 mm), and the alkali-resistant glass fiber net is preferably completely covered. And the second rendering coat mortar layer covers the alkali-resistant glass fiber net and the corner protectors.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides an ultra-thin adiabatic vacuum insulation structure of outer wall STP which characterized in that includes:

a bracket mounted on the outer wall body;

the first surface-coated mortar layer covers the STP heat-insulation board;

2. The external wall STP ultrathin heat insulation vacuum insulation structure as claimed in claim 1, wherein the external wall body comprises a first wall surface and a second wall surface which are vertically connected, and a male and female corner is formed between the first wall surface and the second wall surface;

3. The ultrathin heat insulation vacuum insulation structure for the external wall STP according to claim 2, wherein the STP heat insulation plates comprise a first STP heat insulation plate and a second STP heat insulation plate, the lengths of the first STP heat insulation plate and the second STP heat insulation plate are different, and the first STP heat insulation plate and the second STP heat insulation plate are respectively arranged at the same horizontal height of the edges of the two sides of the internal corner and the external corner;

4. The ultrathin heat-insulation vacuum insulation structure for the external wall STP (Standard transport protocol) of claim 1, wherein a gap is formed between two adjacent STP heat-insulation boards, vitrified micro-bead mortar is filled in the gap, and the surfaces of the vitrified micro-bead mortar and the STP heat-insulation boards are flush.

5. The ultra-thin heat insulation vacuum insulation structure of an external wall STP according to claim 1, wherein a heat insulation slurry layer is arranged on the external wall body at the edge pressing position of the STP heat insulation plate, and the surface of the heat insulation slurry layer is flush with the surface of the STP heat insulation plate.

6. The ultra-thin heat-insulating vacuum insulation structure for external wall STP according to claim 1, wherein said anchor bolt comprises a nail post and a protective cap, said nail post is inserted into said external wall, said protective cap is limited on said alkali-resistant fiberglass mesh.

7. The ultra-thin heat-insulating vacuum insulation structure for external wall STP according to claim 6, wherein in the longitudinal direction of the external wall body, the width edge of the STP heat-insulating plate on the upper layer is intersected with the length edge of the STP heat-insulating plate on the lower layer, the nail column is arranged at the intersection point of the width edge and the length edge, and the protective cap is used for simultaneously supporting three adjacent STP heat-insulating plates.

8. The external wall STP ultrathin heat insulation vacuum insulation structure as claimed in claim 1, further comprising a corner protector, wherein the corner protector covers a part with a corner on the external wall body; the part with the corner comprises a male corner and a female corner of the outer wall body.

9. The ultra-thin heat insulation vacuum insulation structure for external wall STP according to claim 1, wherein the gap between two adjacent STP heat insulation boards is not more than 20 mm.

10. The external wall STP ultrathin heat insulation vacuum insulation structure of claim 1, wherein the alkali resistant fiberglass mesh has a specification of not less than 160 grams per square meter.