CN109503102B - Cement-based inorganic lightweight aggregate insulation board capable of being produced without bracket and preparation method thereof - Google Patents
Cement-based inorganic lightweight aggregate insulation board capable of being produced without bracket and preparation method thereof Download PDFInfo
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- CN109503102B CN109503102B CN201811135822.5A CN201811135822A CN109503102B CN 109503102 B CN109503102 B CN 109503102B CN 201811135822 A CN201811135822 A CN 201811135822A CN 109503102 B CN109503102 B CN 109503102B
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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
- 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/04—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with one ram per mould
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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
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
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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
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
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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
- C04B2201/30—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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- 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The invention relates to a cement-based inorganic lightweight aggregate insulation board capable of being produced without a bracket and a preparation method thereof, wherein the cement-based inorganic lightweight aggregate insulation board comprises the following components: modified cement-based cementing material, lightweight aggregate, modified additive and water. The cement-based inorganic lightweight aggregate insulation board prepared by the invention has smooth and complete surface, no slender impression left by friction with a bracket and excellent apparent quality; the integral performance is uniform, the heat conductivity coefficient is low, and the mechanical property is good; the cost investment of the bracket can be saved, the resources are saved, and the quality of the cement-based inorganic lightweight aggregate insulation board is obviously improved.
Description
Technical Field
The invention belongs to the field of building heat insulation materials, and particularly relates to a cement-based inorganic lightweight aggregate heat insulation board capable of being produced without a bracket and a preparation method thereof.
Background
The inorganic lightweight aggregate insulation board using the vitrified micro bubbles and the expanded perlite as lightweight aggregates can be divided into a water glass-based inorganic lightweight aggregate insulation board and a cement-based inorganic lightweight aggregate insulation board according to the difference of cementing materials. Although the water glass-based inorganic lightweight aggregate insulation board has the advantages of simple production process, low equipment investment and high production efficiency, the water glass-based inorganic lightweight aggregate insulation board can be gradually eliminated from the market due to the defects of softening of a board body and great reduction of mechanical strength in a damp and hot environment. The cement-based inorganic lightweight aggregate insulation board is more complex in production process than a water glass-based insulation board because cement is used as a cementing material.
At present, the production of cement-based inorganic lightweight aggregate insulation boards still has many technical problems, and the process cannot be matched with corresponding raw material properties, so that the production cost is high. The production process of the cement-based inorganic lightweight aggregate insulation board generally comprises 4 steps. Firstly, the material stirring: stirring and mixing the components of granules such as vitrified micro bubbles, gelled material powder, polymer modifier powder or liquid, water and the like. Secondly, forming a blank: the materials are stirred and then are guided into a die of a hydraulic forming machine through conveying equipment, the materials are pressed and formed, a formed blank body is conveyed to the bracket through the push plate, and the multiple layers of brackets are stacked and transferred to a maintenance area through a forklift or a plate trailer. Thirdly, maintenance: the cement product must be cured to develop strength. The existing curing method comprises natural curing, standard curing and steam curing. Natural curing is to stack the materials in natural environment and wait for the strength of the materials to slowly increase. The standard curing is carried out in a curing room with the temperature of 20 +/-3 ℃ and the relative humidity of more than 95 percent. Steam curing is to introduce steam into a curing kiln, and the temperature of steam curing is higher than that of standard curing. Fourthly, drying: the moisture content of the plate body needs to be controlled after the cement-based inorganic lightweight aggregate insulation board is maintained to the designed strength, so that the inorganic lightweight aggregate insulation board is dried finally. The drying can also be divided into natural drying and artificial drying. The natural drying is drying in the sun or high-temperature drying weather, and the artificial drying is removing the moisture in the cement-based inorganic lightweight aggregate insulation board in a short time by heating equipment.
The most time-consuming step in the whole production process of the cement-based inorganic lightweight aggregate insulation board is curing, wherein the curing is performed for half a day in short time and 28 days in long time. Under the existing formula and process, the strength of the green body of the cement-based inorganic lightweight aggregate insulation board formed by pressing is poor when the green body is just separated from a mold frame, and the green body is extremely easy to damage, so that a bracket is required for bearing, and damage or deformation is prevented when the green body is loaded or transported. The bracket is made of stainless steel or cast iron which is not easy to deform, and is generally in a fence shape for maintenance and cost saving. It is the presence of the carrier in production that poses a number of problems. Firstly, the capital investment for bracket manufacturing is large, the requirement of stacking space is large, and the production cost is greatly increased. A cement-based inorganic insulation board blank which is formed by pressing through a press with 1000-inch daily production is continuously operated by matching with at least 7000-inch brackets according to the average maintenance with the brackets for 7 days. Even though cast iron is used as a material for manufacturing the bracket, the cost of the matching bracket is very high and is increased along with the increase of the production capacity. Second, corrosion of the bracket. Even stainless steel bracket, also can appear the phenomenon of corrosion under the circulation repetition effect of maintenance, stoving, leaves the rust mark on inorganic lightweight aggregate heated board surface, influences the pleasing to the eye of inorganic lightweight aggregate heated board. When the corrosion speed is too fast, the bracket needs to be replaced by a new bracket when the mechanical strength of the bracket is insufficient, so that the cost is further increased, the problem of treatment of mass scrapped brackets is also caused, and the problems of waste of space resources and material resources and environmental pollution are caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a cement-based inorganic lightweight aggregate insulation board capable of being produced without a bracket and a preparation method thereof; the prepared cement-based inorganic lightweight aggregate insulation board has a smooth and complete surface, saves the cost investment of a bracket, saves resources, and obviously improves the quality of the cement-based inorganic lightweight aggregate insulation board.
The invention provides a cement-based inorganic lightweight aggregate insulation board capable of being produced without a bracket, which comprises the following components in parts by weight: 160-200 parts of modified cement-based cementing material, 380-480 parts of lightweight aggregate, 40-60 parts of modified additive and 580-620 parts of water.
The modified cement-based cementing material consists of Portland cement clinker, silica fume and sodium silicate powder in a mass ratio of 5-10:1-3: 1-3. Preferably, the mass ratio is 9:1: 1.
The lightweight aggregate is composed of 10-20-mesh closed-cell expanded perlite and 40-80-mesh closed-cell expanded perlite in a volume ratio of 3-5: 1. Preferably, the volume ratio is 4: 1.
The modified additive is prepared by mixing acrylic emulsion, micromolecular silane hydrophobic emulsion, triethanolamine, polycarboxylic acid water-reducing emulsion and wood fibers in a mass ratio of 5-10:1-2:0.1-1:0.1-1: 1-2. Preferably, the mass ratio is 8:1:0.5:0.5: 2.
The invention also provides a preparation method of the cement-based inorganic lightweight aggregate insulation board capable of being produced without a bracket, which comprises the following steps:
(1) stirring the modified cement-based cementing material, the lightweight aggregate, the modified additive and water in a grading manner according to a formula to obtain a semi-dry mixture of the inorganic heat-insulating board;
(2) the semi-dry mixture of the inorganic insulation board obtained in the step (1) enters a die of a hydraulic forming machine through a material distribution system, after a pressure head applies pressure to compress materials, a floating die frame and the pressure head synchronously float downwards to perform bidirectional equivalent pressing forming, and then demolding is performed;
(3) pushing the molded blank obtained in the step (2) onto a plate trolley; and repeating the pressing process, stacking the formed green bodies to 0.6-1.0 m, performing steam curing, and finally drying to obtain the finished product.
The step (1) of fractional stirring comprises liquid-solid mixing and solid-powder mixing.
The length of the narrow side of the formed blank in the step (3) is not more than 30 cm.
And (4) performing steam curing in the step (3) in a saturated steam environment at the temperature of 90-100 ℃.
The inorganic lightweight aggregate insulation board has several main difficult problems in the bracket-free production: firstly, when a push plate pushes a green body which is just demoulded after being pressed and formed to an upper layer of another green body, the damage of surface damage, green body collapse and the like of the two green bodies which are directly contacted due to the action of friction force can be avoided. Secondly, when the blanks of the inorganic lightweight aggregate insulation board are stacked, how to ensure that the strength of the blank at the lowest layer is enough to bear the weight of all the blanks on the upper side without collapse is ensured. And thirdly, when the inorganic light aggregate insulation board blanks stacked together are subjected to steam curing, because the insulation boards are thermal insulation materials, the thermal conductivity is poor, and the phenomenon that the board body is warped and deformed due to inconsistent strength development of all parts of the board body due to different curing temperatures is avoided.
The invention solves the problem by enhancing the cohesion of the blank and simultaneously improving the flexibility of the blank, and the specific method comprises the following steps:
the preparation method comprises the following steps of adjusting the raw material composition of the green body, maximally realizing closest packing by matching the closed-cell expanded perlite with different particle sizes, optimizing a bonding system on the premise of keeping the specific gravity of the cementing material unchanged, and under the volcanic ash activation effect of the modified cement-based cementing material, wherein the hydration of cement clinker is enhanced, the initial setting time is short, the initial strength is high, and the initial strength of the green body of the inorganic light aggregate insulation board which is just demoulded is improved.
And secondly, a proper modified additive plays a role in forming a film by a polymer and changing the electrochemical potential of the surface of the particles, so that on one hand, the effect can be quickly played under pressure to form an organic-aggregate-cementing material integrated matrix, and on the other hand, the inorganic heat-insulating board material has certain thixotropy and fluidity under pressure, so that the inorganic light aggregate heat-insulating board blank can be stably molded and the initial strength can be quickly developed after the inorganic light aggregate heat-insulating board blank is separated from the mold frame.
And thirdly, graded stirring is carried out, and the adsorption to the modified cement-based cementing material and the polymer modified admixture can be reduced after the closed-cell expanded perlite is wetted, so that all the components can fully play a role. The liquid-solid, solid-powder and the final integral mixing are carried out, the uniformity is improved by a three-step stirring mode, and the heated board blank formed by pressing has good performance.
And fourthly, bidirectional equivalent press forming, wherein in the existing press process, pressure is applied unidirectionally through a pressure head, so that the compactness of the inorganic light aggregate insulation board blank is weakened from the middle to the periphery and is reduced from bottom to top in a layering manner. By utilizing the technology that the lower die frame and the pressure head synchronously float in the same direction, the compactness of the blank of the inorganic lightweight aggregate insulation board can be uniform, the strength of the surface, the edge and the corner is enhanced, and the destructive force caused by the interaction between the sliding of the blank can be resisted.
Reasonably designing the size. During stack maintenance, the heat source has two aspects: cement hydration heat and high temperature saturated steam heat. Due to the low heat conduction coefficient of the inorganic lightweight aggregate insulation board, the hydration heat of the cement in the inorganic lightweight aggregate insulation board cannot be diffused to the edge, and the heat brought by high-temperature saturated steam is difficult to transfer from the edge to the inside. Therefore, a statistical result is obtained through a series of experimental comparisons, when the size of the narrow side of the inorganic light aggregate insulation board is controlled within 30cm, the temperature difference of different parts is small, and the inorganic light aggregate insulation board blank cannot generate stress difference in the curing process.
Advantageous effects
(1) The invention abandons the bracket as a carrier for curing the cement-based inorganic lightweight aggregate insulation board blank, directly stacks and cures the blank, can save a large amount of steel or iron brackets, not only greatly reduces the production cost investment, but also saves the stacking space of the brackets and reduces the waste of resources.
(2) According to the invention, after the bracket is abandoned, the step that the bracket bears the green body of the cement-based inorganic lightweight aggregate insulation board to a loading vehicle is omitted, and the production continuity of the cement-based inorganic lightweight aggregate insulation board is improved, so that the production efficiency of the cement-based inorganic lightweight aggregate insulation board is improved, and the automation degree is improved.
(3) In the invention, the cement-based inorganic lightweight aggregate insulation board blanks are directly stacked after the brackets are abandoned, so that the occupied volume of the brackets is reduced, the space required by the blank curing of each car is reduced by 1/3, and the space utilization rate of the curing kiln is improved.
(4) The cement-based inorganic lightweight aggregate insulation board prepared by the invention has smooth and complete surface, no slender impression left by friction with a bracket and excellent apparent quality. The cement-based inorganic lightweight aggregate insulation board has uniform overall performance, low thermal conductivity coefficient and good mechanical property.
Drawings
FIG. 1 is a schematic diagram of a process for producing a cement-based inorganic lightweight aggregate insulation board without a bracket; wherein, 1 is the ground, 2 is the wooden handcart, 3 is inorganic lightweight aggregate heated board body, 4 is the top pressure head, 5 is the push pedal, 6 is the die frame that floats, 7 is the hydraulic stem.
FIG. 2 is a bracket-free process real bat of a cement-based inorganic lightweight aggregate insulation board.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
380 parts of a mixture of 10-mesh closed-cell expanded perlite and 40-mesh closed-cell expanded perlite in a volume ratio of 4:1 and 580 parts of water are mixed and moistened and stirred, 160 parts of modified cement-based cementing material (consisting of silicate cement clinker, silica fume and sodium silicate powder in a mass ratio of 9:1: 1) is added, then the mixture enters solid-powder secondary stirring, and the mixed material is subjected to solid-liquid tertiary stirring with 40 parts of a mixture of acrylic emulsion, micromolecular silane hydrophobic emulsion, triethanolamine, polycarboxylic acid water-reducing emulsion and wood fiber in a mass ratio of 8:1:0.5:0.5: 2. The materials after the grading stirring and mixing enter a die of a hydraulic forming machine through a material distribution system, after a pressure head applies pressure to compress the materials, a die frame and the pressure head synchronously float downwards to realize bidirectional equivalent press forming, and then the die is removed. The formed inorganic lightweight aggregate thermal insulation slab body is pushed onto the plate trailer by the push plate. And repeating the pressing process, and directly pushing the newly formed inorganic heat-insulation plate blank to the upper part of the previous inorganic light aggregate heat-insulation plate blank by the push plate to stack together. And (4) conveying the inorganic lightweight aggregate insulation board blank into a curing kiln for curing by saturated steam at 90 ℃ until the inorganic lightweight aggregate insulation board blank is stacked to 1.0 m.
And drying the cured inorganic lightweight aggregate insulation board to obtain a finished product. The inorganic lightweight aggregate insulation board is detected according to the regulations of the existing national standard JG 435 of inorganic lightweight aggregate fireproof insulation board, and the main performance results are as follows: dry density 220kg/m3The compression strength is 0.62MPa, the tensile strength of a vertical plate surface is 0.15MPa, the thermal conductivity is 0.056W/(m.K), the volume water absorption is 5 percent, and the hot-dip strength loss rate is 20 percent.
Example 2
480 parts of 20-mesh closed-cell expanded perlite and 80-mesh closed-cell expanded perlite mixed material in a volume ratio of 4:1 are mixed with 580 parts of water for wetting and stirring, 200 parts of modified cement-based cementing material (consisting of silicate cement clinker, silica fume and sodium silicate powder in a mass ratio of 9:1: 1) is added at the same time, then the mixture is subjected to solid-powder secondary stirring, and the mixed material is subjected to solid-liquid tertiary stirring with 60 parts of acrylic emulsion, micromolecule silane hydrophobic emulsion, triethanolamine, polycarboxylic acid water-reducing emulsion and wood fiber in a mass ratio of 8:1:0.5:0.5: 2. The materials after the grading stirring and mixing enter a die of a hydraulic forming machine through a material distribution system, after a pressure head applies pressure to compress the materials, a die frame and the pressure head synchronously float downwards to realize bidirectional equivalent press forming, and then the die is removed. The formed inorganic lightweight aggregate thermal insulation slab body is pushed onto the plate trailer by the push plate. And repeating the pressing process, and directly pushing the newly formed inorganic heat-insulation plate blank to the upper part of the previous inorganic light aggregate heat-insulation plate blank by the push plate to stack together. And (4) conveying the inorganic lightweight aggregate insulation board blank into a curing kiln for curing by saturated steam at 100 ℃ until the inorganic lightweight aggregate insulation board blank is stacked to 0.8 m.
And drying the cured inorganic lightweight aggregate insulation board to obtain a finished product. The inorganic lightweight aggregate insulation board is detected according to the regulations of the existing national standard JG 435 of inorganic lightweight aggregate fireproof insulation board, and the main performance results are as follows: dry density 290kg/m3The compression strength is 1.24MPa, the tensile strength of a vertical plate surface is 0.26MPa, the thermal conductivity is 0.068W/(m.K), the volume water absorption is 7 percent, and the hot-dip strength loss rate is 15 percent.
Example 3
420 parts of a mixture of 10-mesh closed-cell expanded perlite and 40-mesh closed-cell expanded perlite in a volume ratio of 4:1 and 600 parts of water are mixed for wetting and stirring, 180 parts of modified cement-based cementing material (consisting of silicate cement clinker, silica fume and sodium silicate powder in a mass ratio of 9:1: 1) is added at the same time, then the mixture is subjected to solid-powder secondary stirring, and the mixed material is subjected to solid-liquid tertiary stirring with 50 parts of a mixture of acrylic emulsion, small molecular silane hydrophobic emulsion, triethanolamine, polycarboxylic acid water-reducing emulsion and wood fiber in a mass ratio of 8:1:0.5:0.5: 2. The materials after the grading stirring and mixing enter a die of a hydraulic forming machine through a material distribution system, after a pressure head applies pressure to compress the materials, a die frame and the pressure head synchronously float downwards to realize bidirectional equivalent press forming, and then the die is removed. The formed inorganic lightweight aggregate thermal insulation slab body is pushed onto the plate trailer by the push plate. And repeating the pressing process, and directly pushing the newly formed inorganic heat-insulation plate blank to the upper part of the previous inorganic light aggregate heat-insulation plate blank by the push plate to stack together. And (4) conveying the inorganic lightweight aggregate insulation board blank into a curing kiln for curing by saturated steam at 95 ℃ until the inorganic lightweight aggregate insulation board blank is stacked to 0.6 m.
The inorganic lightweight aggregate insulation board after the maintenance is finished is driedAnd drying to obtain a finished product. The inorganic lightweight aggregate insulation board is detected according to the regulations of the existing national standard JG 435 of inorganic lightweight aggregate fireproof insulation board, and the main performance results are as follows: dry density 235kg/m3The compression strength is 0.66MPa, the tensile strength of a vertical plate surface is 0.21MPa, the thermal conductivity is 0.059W/(m.K), the volume water absorption is 8 percent, and the hot-dip strength loss rate is 14 percent.
Example 4
460 parts of a mixture of 10-mesh closed-cell expanded perlite and 40-mesh closed-cell expanded perlite in a volume ratio of 4:1 is mixed with 620 parts of water for wetting and stirring, 200 parts of a modified cement-based cementing material (consisting of silicate cement clinker, silica fume and sodium silicate powder in a mass ratio of 9:1: 1) is added at the same time, then the mixture is subjected to solid-powder secondary stirring, and the mixed material is subjected to solid-liquid tertiary stirring with 60 parts of a mixture of acrylic emulsion, small molecular silane hydrophobic emulsion, triethanolamine, polycarboxylic acid water-reducing emulsion and wood fiber in a mass ratio of 8:1:0.5:0.5: 2. The materials after the grading stirring and mixing enter a die of a hydraulic forming machine through a material distribution system, after a pressure head applies pressure to compress the materials, a die frame and the pressure head synchronously float downwards to realize bidirectional equivalent press forming, and then the die is removed. The formed inorganic lightweight aggregate thermal insulation slab body is pushed onto the plate trailer by the push plate. And repeating the pressing process, and directly pushing the newly formed inorganic heat-insulation plate blank to the upper part of the previous inorganic light aggregate heat-insulation plate blank by the push plate to stack together. And (4) conveying the inorganic lightweight aggregate insulation board blank into a curing kiln for curing by saturated steam at 100 ℃ until the inorganic lightweight aggregate insulation board blank is stacked to 1.0 m.
And drying the cured inorganic lightweight aggregate insulation board to obtain a finished product. The inorganic lightweight aggregate insulation board is detected according to the regulations of the existing national standard JG 435 of inorganic lightweight aggregate fireproof insulation board, and the main performance results are as follows: dry density 300kg/m3The compression strength is 1.63MPa, the tensile strength of a vertical plate surface is 0.35MPa, the thermal conductivity is 0.068W/(m.K), the volume water absorption is 6 percent, and the hot-dip strength loss rate is 16 percent.
Example 5
480 parts of a mixture of 10-mesh closed-cell expanded perlite and 40-mesh closed-cell expanded perlite in a volume ratio of 4:1 and 620 parts of water are mixed for wetting and stirring, 160 parts of a modified cement-based cementing material (consisting of silicate cement clinker, silica fume and sodium silicate powder in a mass ratio of 9:1: 1) is added at the same time, then the mixture is subjected to solid-powder secondary stirring, and the mixed material is subjected to solid-liquid tertiary stirring with 60 parts of a mixture of acrylic emulsion, small-molecular silane hydrophobic emulsion, triethanolamine, polycarboxylic acid water-reducing emulsion and wood fiber in a mass ratio of 8:1:0.5:0.5: 2. The materials after the grading stirring and mixing enter a die of a hydraulic forming machine through a material distribution system, after a pressure head applies pressure to compress the materials, a die frame and the pressure head synchronously float downwards to realize bidirectional equivalent press forming, and then the die is removed. The formed inorganic lightweight aggregate thermal insulation slab body is pushed onto the plate trailer by the push plate. And repeating the pressing process, and directly pushing the newly formed inorganic heat-insulation plate blank to the upper part of the previous inorganic light aggregate heat-insulation plate blank by the push plate to stack together. And (4) conveying the inorganic lightweight aggregate insulation board blank into a curing kiln for curing by saturated steam at 95 ℃ until the inorganic lightweight aggregate insulation board blank is stacked to 0.6 m.
And drying the cured inorganic lightweight aggregate insulation board to obtain a finished product. The inorganic lightweight aggregate insulation board is detected according to the regulations of the existing national standard JG 435 of inorganic lightweight aggregate fireproof insulation board, and the main performance results are as follows: dry density 200kg/m3The compression strength is 0.42MPa, the tensile strength of the vertical plate surface is 0.15MPa, the thermal conductivity is 0.050W/(m.K), the volume water absorption rate is 8 percent, and the hot-dip strength loss rate is 24 percent.
Example 6
380 parts of a mixture of 10-mesh closed-cell expanded perlite and 40-mesh closed-cell expanded perlite in a volume ratio of 4:1 and 580 parts of water are mixed and moistened and stirred, 200 parts of a modified cement-based cementing material (consisting of silicate cement clinker, silica fume and sodium silicate powder in a mass ratio of 9:1: 1) is added, then the mixture is subjected to solid-powder secondary stirring, and the mixed material is subjected to solid-liquid tertiary stirring with 40 parts of a mixture of acrylic emulsion, micromolecule silane hydrophobic emulsion, triethanolamine, polycarboxylic acid water-reducing emulsion and wood fiber in a mass ratio of 8:1:0.5:0.5: 2. The materials after the grading stirring and mixing enter a die of a hydraulic forming machine through a material distribution system, after a pressure head applies pressure to compress the materials, a die frame and the pressure head synchronously float downwards to realize bidirectional equivalent press forming, and then the die is removed. The formed inorganic lightweight aggregate thermal insulation slab body is pushed onto the plate trailer by the push plate. And repeating the pressing process, and directly pushing the newly formed inorganic heat-insulation plate blank to the upper part of the previous inorganic light aggregate heat-insulation plate blank by the push plate to stack together. And (4) conveying the inorganic lightweight aggregate insulation board blank into a curing kiln for curing by saturated steam at 90 ℃ until the inorganic lightweight aggregate insulation board blank is stacked to 1.0 m.
And drying the cured inorganic lightweight aggregate insulation board to obtain a finished product. The inorganic lightweight aggregate insulation board is detected according to the regulations of the existing national standard JG 435 of inorganic lightweight aggregate fireproof insulation board, and the main performance results are as follows: dry density 305kg/m3The compression strength is 1,80MPa, the tensile strength of a vertical plate surface is 0.35MPa, the thermal conductivity is 0.070W/(m.K), the volume water absorption is 3 percent, and the hot-dip strength loss rate is 12 percent.
Claims (4)
1. The utility model provides a can have inorganic lightweight aggregate heated board of cement base of bracket production which characterized in that: the composition comprises the following components in parts by weight: 160-200 parts of modified cement-based cementing material, 380-480 parts of lightweight aggregate, 40-60 parts of modified additive and 580-620 parts of water; wherein the modified cement-based cementing material consists of Portland cement clinker, silica fume and sodium silicate powder in a mass ratio of 5-10:1-3: 1-3; the lightweight aggregate is prepared from 10-20-mesh closed-cell expanded perlite and 40-80-mesh closed-cell expanded perlite in a volume ratio of 3-5: 1; the modified additive is formed by mixing acrylic emulsion, micromolecular silane hydrophobic emulsion, triethanolamine, polycarboxylic acid water-reducing emulsion and wood fiber according to the mass ratio of 5-10:1-2:0.1-1:0.1-1: 1-2;
the preparation method comprises the following steps:
(1) stirring the modified cement-based cementing material, the lightweight aggregate, the modified additive and water in a grading manner according to a formula to obtain a semi-dry mixture of the inorganic heat-insulating board;
(2) the semi-dry mixture of the inorganic insulation board obtained in the step (1) enters a die of a hydraulic forming machine through a material distribution system, after a pressure head applies pressure to compress materials, a floating die frame and the pressure head synchronously float downwards to perform bidirectional equivalent pressing forming, and then demolding is performed;
(3) pushing the molded blank obtained in the step (2) onto a plate trolley; and repeating the pressing process, stacking the formed blank bodies to 0.6-1.0 m, performing steam curing, and finally drying to obtain the finished product.
2. The cement-based inorganic lightweight aggregate insulation board capable of being produced without a bracket according to claim 1, which is characterized in that: the step (1) of fractional stirring comprises liquid-solid mixing and solid-powder mixing.
3. The cement-based inorganic lightweight aggregate insulation board capable of being produced without a bracket according to claim 1, which is characterized in that: the length of the narrow side of the formed blank in the step (3) is not more than 30 cm.
4. The cement-based inorganic lightweight aggregate insulation board capable of being produced without a bracket according to claim 1, which is characterized in that: and (4) performing steam curing in the step (3) in a saturated steam environment at the temperature of 90-100 ℃.
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| CN112694289A (en) * | 2020-12-17 | 2021-04-23 | 宁波荣山材料科技有限公司 | Inorganic lightweight aggregate insulation board with multilayer structure and preparation method thereof |
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| CN201760943U (en) * | 2010-09-27 | 2011-03-16 | 泉州市祥达机械制造有限公司 | Building block press forming machine |
| CN102815906A (en) * | 2012-09-07 | 2012-12-12 | 宁波荣山新型材料有限公司 | Dual organic modified cement-base expanded perlite fireproof thermal-insulation board and preparation method thereof |
| CN106476129A (en) * | 2015-08-26 | 2017-03-08 | 河南省机械院机械装备股份有限公司 | A kind of charge car device that can achieve two-way compacting |
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|---|---|---|---|---|
| CN201760943U (en) * | 2010-09-27 | 2011-03-16 | 泉州市祥达机械制造有限公司 | Building block press forming machine |
| CN102815906A (en) * | 2012-09-07 | 2012-12-12 | 宁波荣山新型材料有限公司 | Dual organic modified cement-base expanded perlite fireproof thermal-insulation board and preparation method thereof |
| CN106476129A (en) * | 2015-08-26 | 2017-03-08 | 河南省机械院机械装备股份有限公司 | A kind of charge car device that can achieve two-way compacting |
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