CN112299806A - Autoclaved aerated concrete slab and preparation method thereof - Google Patents
Autoclaved aerated concrete slab and preparation method thereof Download PDFInfo
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- CN112299806A CN112299806A CN202011235715.7A CN202011235715A CN112299806A CN 112299806 A CN112299806 A CN 112299806A CN 202011235715 A CN202011235715 A CN 202011235715A CN 112299806 A CN112299806 A CN 112299806A
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- 239000004567 concrete Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims description 14
- 239000003365 glass fiber Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- 229910052602 gypsum Inorganic materials 0.000 claims description 27
- 239000010440 gypsum Substances 0.000 claims description 27
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 22
- 239000004570 mortar (masonry) Substances 0.000 claims description 20
- 239000010881 fly ash Substances 0.000 claims description 18
- 239000002002 slurry Substances 0.000 claims description 17
- 239000011398 Portland cement Substances 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 239000000292 calcium oxide Substances 0.000 claims description 11
- 235000012255 calcium oxide Nutrition 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000000498 ball milling Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000007873 sieving Methods 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000010883 coal ash Substances 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 17
- 239000010959 steel Substances 0.000 description 17
- 238000003756 stirring Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 230000002421 anti-septic effect Effects 0.000 description 4
- 238000005192 partition Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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- 239000012779 reinforcing material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
-
- 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
- C04B28/14—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 containing calcium sulfate cements
- C04B28/142—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 containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
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- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/049—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres completely or partially of insulating material, e.g. cellular concrete or foamed plaster
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2103/00—Material constitution of slabs, sheets or the like
- E04B2103/02—Material constitution of slabs, sheets or the like of ceramics, concrete or other stone-like material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
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Abstract
The invention discloses an autoclaved aerated concrete slab, and relates to the technical field of aerated concrete. The autoclaved aerated concrete slab comprises a base material and a glass fiber rod framework; the glass fiber rod framework is embedded in a base material. In addition, the autoclaved aerated concrete slab provided by the invention has the advantages of high strength, high bearing capacity, good durability, good heat insulation performance, small drying shrinkage and low production cost.
Description
Technical Field
The invention relates to the technical field of aerated concrete, in particular to an autoclaved aerated concrete slab and a preparation method thereof.
Background
The original production process of the autoclaved aerated concrete slab needs to use a steel bar grid as a reinforcing material, but the raw materials of the autoclaved aerated concrete product comprise alkaline materials such as lime, cement and the like, so that the steel bar is corroded and rusted, and the steel bar needs to be subjected to anticorrosion treatment. However, the preservative has certain influence on the environment, is not easy to perform environmental protection treatment, and the thermal expansibility of the steel bar is greatly different from that of autoclaved aerated concrete.
Disclosure of Invention
Based on the above, the invention aims to overcome the defects in the prior art and provide an autoclaved aerated concrete slab produced by using glass fiber rods instead of reinforcing steel bars, and the autoclaved aerated concrete slab with better durability and comprehensiveness is obtained.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: an autoclaved aerated concrete slab comprises a base material and a glass fiber rod framework; wherein, the glass fiber rod framework is embedded in the matrix material.
According to the invention, the glass fiber rod framework is embedded in the matrix material, and the obtained autoclaved aerated concrete slab has high strength, high bearing capacity and good durability.
Preferably, the matrix material comprises the following components in parts by weight: 20-25 parts of Portland cement, 10-15 parts of quicklime powder, 60-64 parts of siliceous materials, 4-6 parts of desulfurized gypsum and 0.08-0.1 part of water-based aluminum paste.
More preferably, the matrix material comprises the following components in parts by weight: 20 parts of Portland cement, 10 parts of quicklime powder, 64 parts of siliceous materials, 6 parts of desulfurized gypsum and 0.08 part of water-based aluminum paste.
Preferably, the siliceous material consists of silt and fly ash; wherein the mass ratio of the silt to the fly ash is as follows: silt: 8.5-9.5% of coal ash: 1.5 to 0.5; further, the mass ratio of the silt and the fly ash is as follows: silt: 9 parts of fly ash: 1.
the proper amount of fly ash can improve the fluidity of the product, and the finished product is not easy to generate watermarks and adhesion; however, too much fly ash is likely to cause gas-holding cracks in the product, so the fly ash is in the above range.
Preferably, the diameter of the glass fiber rod in the glass fiber rod framework is 5-12 mm.
Considering the thickness of the autoclaved aerated concrete plate and the related requirements of the national standard of the product, the diameter of the glass fiber rod is most suitable to be 5-12 mm.
In addition, the invention also provides a preparation method of the autoclaved aerated concrete slab, which comprises the following steps:
(1) adding water into silt and fly ash for dispersing, then carrying out ball milling to prepare mixed mortar, and drying and sieving the mixed mortar; simultaneously, adding water into the desulfurized gypsum for dispersion to prepare desulfurized gypsum slurry;
(2) uniformly mixing the mixed mortar and the desulfurized gypsum slurry prepared in the step (1), quicklime powder, portland cement, water-based aluminum paste and water, pouring the mixture into a mold, fixing a framework consisting of glass fiber rods in the mold, and standing and hardening to obtain a blank;
(3) and (3) removing the blank prepared in the step (2) from the die, cutting, and then carrying out autoclaved curing to obtain the autoclaved aerated concrete slab.
Preferably, in the step (1), the water content of the mixed mortar is 38-42%, and the water content of the desulfurized gypsum slurry is 45-55%.
Preferably, in the step (1), the fineness of the mixed mortar is: and (3) drying and sieving a certain slurry, wherein the sieved sieve is a 0.08mm square-hole sieve, and the rest amount after sieving accounts for 18-22% of the weight before sieving.
Preferably, in the step (2), the standing and hardening time is 2.5-3 h.
Preferably, in the step (3), steam pressure of the autoclave curing is 1.2-1.3 MPa, and the autoclave curing time is 11-13 h.
Compared with the prior art, the invention has the beneficial effects that: the autoclaved aerated concrete slab provided by the invention has the advantages of high strength, high bearing capacity, good durability, good heat-insulating property, small drying shrinkage and low production cost.
Drawings
FIG. 1 is a flow chart of the preparation of autoclaved aerated concrete panels;
FIG. 2 is a schematic structural view of an autoclaved aerated concrete slab with the thickness of less than or equal to 100 mm;
FIG. 3 is a schematic structural diagram of an autoclaved aerated concrete slab with the thickness of more than or equal to 100 mm.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to the accompanying drawings and specific embodiments.
The examination conditions of the silt used in the practice of the present invention are shown in table 1, and the examination conditions of the fly ash are shown in table 2:
TABLE 1 examination of silt
| Inspection item | Method standard | Standard requirements | The result of the detection |
| Silica (%) | GB/T 176-2017 | —— | 93.13 |
| Chloride ion (%) | GB/T 176-2017 | —— | 0.008 |
| Fineness/screen allowance of 1.18mm square hole screen (%) | —— | —— | 12～15 |
TABLE 2 examination of fly ash
Examples 1-3 selection of components in autoclaved aerated concrete panels in parts by weight is shown in table 3:
table 3 selection of parts by weight of the components of examples 1-3
Example 1
According to an embodiment of the invention, the preparation process of the autoclaved aerated concrete slab comprises the following steps:
(1) adding water into silt and fly ash for dispersing, then carrying out ball milling to prepare mixed mortar with the water content of 40 +/-2 percent and the screen residue of a 0.08mm square-hole screen of 20 +/-2 percent, and adding water into desulfurized gypsum for dispersing to prepare desulfurized gypsum slurry with the water content of 50 +/-5 percent;
(2) uniformly mixing the mixed mortar and the desulfurized gypsum slurry prepared in the step (1), quicklime powder, portland cement, water-based aluminum paste and water, pouring the mixture into a mold, fixing a framework (the diameter of the glass fiber rod is 5mm, the distance between long ribs is 150mm, the distance between two short ribs at two ends is 100mm, the distance between other short ribs is about 688mm, and the distance between the long ribs and the end of a plate is 5mm) formed by glass fiber rods in the mold, and standing and hardening for 2.5 hours to obtain a blank;
(3) and (3) removing the green body prepared in the step (2) from the die, cutting, and performing autoclaved curing for 13h under the condition that the steam pressure is 1.25MPa to obtain the autoclaved aerated concrete slab (the structural schematic diagram is shown in figure 2; the size specification is 1570mm multiplied by 600mm multiplied by 100 mm; the application is a partition plate).
Example 2
According to an embodiment of the invention, the preparation process of the autoclaved aerated concrete slab comprises the following steps:
(1) ball-milling the silt, adding water into the silt and the fly ash, uniformly stirring to prepare mixed mortar with the water content of 40 +/-2 percent and the screen residue of 20 +/-2 percent passing through a 0.08mm square-hole sieve, adding water into the desulfurized gypsum, and uniformly stirring to prepare desulfurized gypsum slurry with the water content of 50 +/-5 percent;
(2) uniformly mixing the mixed mortar, the desulfurized gypsum slurry, the quicklime powder, the portland cement, the water-based aluminum paste and water, pouring the mixture into a mold, fixing a framework (the diameter of a glass fiber rod is 7mm, the distance between long ribs is 150mm, the distance between two short ribs at two ends is 100mm, the distance between other short ribs is about 650mm, the distance between meshes is 150mm, and the distance between the long ribs and the ends of a plate is 5mm) formed by glass fiber rods in the mold, standing and hardening for 2.5 hours to obtain a blank body;
(3) and (3) removing the blank from the die, cutting, and performing autoclaved curing for 12h under the condition that the steam pressure is 1.3MPa to obtain the autoclaved aerated concrete slab (the structural schematic diagram is shown in figure 2; the size specification is 2100mm multiplied by 600mm multiplied by 100 mm; the application is a partition plate).
Example 3
According to an embodiment of the invention, the preparation process of the autoclaved aerated concrete slab comprises the following steps:
(1) ball-milling the silt, adding water into the silt and the fly ash, uniformly stirring to prepare mixed mortar with the water content of 40 +/-2 percent and the screen residue of 20 +/-2 percent passing through a 0.08mm square-hole sieve, adding water into the desulfurized gypsum, and uniformly stirring to prepare desulfurized gypsum slurry with the water content of 50 +/-5 percent;
(2) uniformly mixing the mixed mortar, the desulfurized gypsum slurry, the quicklime powder, the portland cement, the water-based aluminum paste and water, pouring the mixture into a mold, fixing a framework (comprising two layers of glass fiber rod framework nets which are arranged in parallel and plastic buckles which are longitudinally connected, wherein the diameter of the glass fiber rod is 8mm, the distance between long bars is 150mm, the distance between two short bars at two ends is 100mm, the distance between other short bars is about 697mm, the distance between the steel bar nets is 150mm, and the distance between the long bars and the ends of the plate is 5mm) in the mold, and standing and hardening the mixture for 2h to obtain a blank;
(3) and (3) removing the blank from the mold, cutting, and performing autoclaved curing for 13h under the condition that the steam pressure is 1.2MPa to obtain the autoclaved aerated concrete slab (the structural schematic diagram is shown in figure 3; the size specification is 3000mm multiplied by 600mm multiplied by 200 mm; the application is an external wall panel).
Meanwhile, the invention is provided with comparative examples 1-2, the comparative example 1 adopts a steel bar framework with the surface subjected to antiseptic treatment, the selection of the weight parts of the other components is completely the same as that of the embodiment 3, and the preparation process of the comparative example 1 comprises the following steps:
(1) ball-milling the silt, adding water into the silt and the fly ash, uniformly stirring to prepare mixed mortar with the water content of 40 +/-2 percent and the screen residue of 20 +/-2 percent passing through a 0.08mm square-hole sieve, adding water into the desulfurized gypsum, and uniformly stirring to prepare desulfurized gypsum slurry with the water content of 50 +/-5 percent;
(2) uniformly mixing the mixed mortar, the desulfurized gypsum slurry, the quicklime powder, the portland cement, the water-based aluminum paste and water, pouring the mixture into a mold, fixing a steel bar framework (comprising two layers of steel bar nets which are arranged in parallel and longitudinally connected steel sheets, wherein the steel bar framework is subjected to antiseptic treatment on the surface, the diameter of each steel bar is 8mm, the distance between long bars is 150mm, the distance between two short bars at two ends is 100mm, the distance between other short bars is about 697mm, the distance between the steel bar nets is 150mm, and the distance between the long bars and the ends of the plates is 5mm) in the mold, and standing and hardening for 2 hours to obtain a blank;
(3) and (3) removing the blank from the mold, cutting, and performing autoclaved curing for 13h under the condition that the steam pressure is 1.2MPa to obtain the autoclaved aerated concrete slab (the structural schematic diagram is shown in figure 3; the size specification is 3000mm multiplied by 600mm multiplied by 200 mm; the application is an external wall panel).
Comparative example 2 adopts a steel reinforcement framework with a surface subjected to antiseptic treatment, the selection of the weight parts of the rest components is completely the same as that of example 2, and the preparation process of the comparative example 2 comprises the following steps:
(1) ball-milling the silt, adding water into the silt and the fly ash, uniformly stirring to prepare mixed mortar with the water content of 40 +/-2 percent and the screen residue of 20 +/-2 percent passing through a 0.08mm square-hole sieve, adding water into the desulfurized gypsum, and uniformly stirring to prepare desulfurized gypsum slurry with the water content of 50 +/-5 percent;
(2) uniformly mixing the mixed mortar, the desulfurized gypsum slurry, the quicklime powder, the portland cement, the water-based aluminum paste and water, pouring the mixture into a mold, fixing a reinforcing mesh (the diameter of a reinforcing steel bar is 7mm, the distance between long bars is 150mm, the distance between two short bars at two ends is 100mm, the distance between other short bars is about 650mm, the distance between meshes is 150mm, and the distance between the long bars and the ends of a plate is 5mm) with the surface subjected to antiseptic treatment in the mold, and standing and hardening for 2.5 hours to obtain a blank;
(3) and (3) removing the blank from the die, cutting, and performing autoclaved curing for 12h under the condition that the steam pressure is 1.3MPa to obtain the autoclaved aerated concrete slab (the structural schematic diagram is shown in figure 2; the size specification is 2100mm multiplied by 600mm multiplied by 100 mm; the application is a partition plate).
And (3) performance testing:
the autoclaved aerated concrete slabs of examples 1 to 3 and comparative examples 1 to 2 were subjected to performance tests, and the test results are shown in table 4:
table 4 test results of properties of autoclaved aerated concrete panels (a5.0, B06)
Note: the detection basis is as follows: GB/T15762-.
Through the examples 2 and 3 and the comparative examples 1 and 2, the autoclaved aerated concrete plate produced by replacing the reinforcing steel bars with the glass fiber rods has better heat insulation effect and better adhesive force than the reinforcing steel bars. In addition, as the raw materials of the autoclaved aerated concrete product comprise alkaline materials such as lime, cement and the like, the steel bar can be corroded to rust, although the corrosion treatment time of the steel bar is long, the risk of rusting also exists, and once the steel bar is rusted, the steel bar can cause irreversible damage to the plate. And the glass fiber rod is a non-metal composite material, so that the possibility of rusting does not exist, and the durability is better.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The autoclaved aerated concrete slab is characterized by comprising a base material and a glass fiber rod framework, wherein the glass fiber rod framework is embedded in the base material.
2. The autoclaved aerated concrete panel according to claim 1, wherein the matrix material comprises the following components in parts by weight: 20-25 parts of Portland cement, 10-15 parts of quicklime powder, 60-64 parts of siliceous materials, 4-6 parts of desulfurized gypsum and 0.08-0.1 part of water-based aluminum paste.
3. The autoclaved aerated concrete panel according to claim 2, wherein the matrix material comprises the following components in parts by weight: 20 parts of Portland cement, 10 parts of quicklime powder, 64 parts of siliceous materials, 6 parts of desulfurized gypsum and 0.08 part of water-based aluminum paste.
4. The autoclaved aerated concrete panel according to claim 2 or 3, wherein the siliceous material consists of silt and fly ash; wherein the mass ratio of the silt to the fly ash is as follows: silt: 8.5-9.5% of coal ash: 1.5 to 0.5.
5. The autoclaved aerated concrete panel according to claim 1, wherein the diameter of the glass fiber rod in the glass fiber rod skeleton is 5-12 mm.
6. A method for preparing an autoclaved aerated concrete panel according to any one of claims 1 to 5, comprising the following steps:
(1) adding water into silt and fly ash for dispersing, then carrying out ball milling to prepare mixed mortar, and drying and sieving the mixed mortar; simultaneously, adding water into the desulfurized gypsum for dispersion to prepare desulfurized gypsum slurry;
(2) uniformly mixing the mixed mortar and the desulfurized gypsum slurry prepared in the step (1), quicklime powder, portland cement, water-based aluminum paste and water, pouring the mixture into a mold, fixing a framework consisting of glass fiber rods in the mold, and standing and hardening to obtain a blank;
(3) and (3) removing the blank prepared in the step (2) from the die, cutting, and then carrying out autoclaved curing to obtain the autoclaved aerated concrete slab.
7. The preparation method of the autoclaved aerated concrete panel according to claim 6, wherein in the step (1), the water content of the mixed mortar is 38-42%, and the water content of the desulfurized gypsum slurry is 45-55%.
8. The preparation method of the autoclaved aerated concrete panel according to claim 6, wherein in the step (1), the sieve for mixing the mortar is a 0.08mm square-hole sieve, and the rest amount after sieving accounts for 18-22% of the weight before sieving.
9. The preparation method of the autoclaved aerated concrete panel according to claim 6, wherein in the step (2), the standing and hardening time is 2.5-3 h.
10. The preparation method of the autoclaved aerated concrete panel according to claim 6, wherein in the step (3), steam pressure of autoclave curing is 1.2-1.3 MPa, and the time of autoclave curing is 11-13 h.
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