CN113149581B - Concrete companion plate and preparation process thereof - Google Patents
Concrete companion plate and preparation process thereof Download PDFInfo
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- CN113149581B CN113149581B CN202110516742.XA CN202110516742A CN113149581B CN 113149581 B CN113149581 B CN 113149581B CN 202110516742 A CN202110516742 A CN 202110516742A CN 113149581 B CN113149581 B CN 113149581B
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
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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
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
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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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Abstract
The invention relates to the technical field of floor support plate preparation, in particular to a concrete companion plate and a preparation process thereof, wherein the concrete companion plate comprises the following raw materials in parts by weight: 5-6 parts of quartz powder, 4-5 parts of cellulose fiber, 2-3 parts of ultrahigh-strength PVA fiber, 9-11 parts of sulphoaluminate cement, 1-2 parts of silica fume, 1-2 parts of bentonite and 1-2 parts of liquid siloxane water repellent; the process comprises the steps of pulping, forming, pressurizing, primary curing, demoulding, steam curing, drying and the like. According to the invention, the material formula is adjusted, so that the material proportion of the material is more similar to that of the concrete, and the bonding strength between the materials is improved; meanwhile, a liquid siloxane water repellent is added to form a compact waterproof coating on the surface of the plate, so that the water absorption of the plate can be effectively reduced by more than 20%.
Description
Technical Field
The invention relates to the technical field of floor support plate preparation, in particular to a concrete companion plate and a preparation process thereof.
Background
Exempt from to tear open die mould steel bar truss floor carrier plate with concrete companion's board novel assembled floor product adopts the dull and stereotyped traditional profiled sheet die block board of replacing of fiber cement, adopts self-tapping nail and connects the base with fiber cement board and steel bar truss connection fixed, has realized that the installation is swift, extensive applicability's demand is one of novel floor construction selection for assembly type building. Generally speaking, exempt from to tear off mould concrete companion's board for truss floor carrier plate selects for use ordinary fiber cement flat board, but because ordinary fiber cement flat board surface is too level and smooth, the adhesive strength between its and the concrete is lower, and ordinary panel and concrete adhesive strength average value are only 0.1MPa, and floor carrier plate and building structure are said with the same life-span, and after connecting used self-tapping nail the corrosion and take off, the risk that the die block also can appear droing.
In addition, the water absorption of the ordinary fiber cement slab is generally about 28%, and the rapid water absorption property of the ordinary fiber cement slab can cause the concrete to be dehydrated too fast in the concrete pouring process, thus seriously affecting the curing strength of the concrete.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a concrete companion plate and a production process thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a concrete companion plate comprises the following raw materials in parts by weight: 5-6 parts of quartz powder, 4-5 parts of cellulose fiber, 2-3 parts of ultrahigh-strength PVA fiber, 9-11 parts of sulphoaluminate cement, 1-2 parts of silica fume, 1-2 parts of bentonite and 1-2 parts of liquid siloxane water repellent.
Preferably, the concrete companion plate comprises the following raw materials in parts by weight: 5.2 parts of quartz powder, 4.3 parts of cellulose fiber, 2.2 parts of ultrahigh-strength PVA fiber, 9.5 parts of sulphoaluminate cement, 1.3 parts of silica fume, 1.3 parts of bentonite and 1.3 parts of liquid siloxane water repellent.
The invention also provides another technical scheme:
a preparation process of a concrete companion plate comprises the following steps:
pulping: putting the raw materials except the liquid siloxane water repellent into a primary storage tank according to the weight ratio, adding water, stirring for 10-20 minutes, and after the slurry is uniformly mixed, introducing the slurry into a secondary storage tank through a slurry pump;
molding: and (3) after the slurry is uniformly stirred, the slurry is pumped into a slurry storage tank within 10-20 minutes, a liquid siloxane water repellent in specified weight parts is added, the slurry is uniformly stirred, and the slurry is stored for no more than 15 minutes. The slurry is uniformly distributed on the blanket, the running speed of the blanket is ensured to be consistent, a wet plate blank with uniform thickness is obtained, and the surface of the wet plate blank is ensured to be smooth and free of impurities.
Pressurizing: pressing the stacked blanks into a blank with a groove on the back by adopting a gradual slow-discharge pressurizing technology;
fifthly, primary maintenance: standing and curing the pressed and formed plate blank for more than 10 hours in a pre-curing kiln at the temperature of 35-40 ℃ to finally solidify cement in the plate, so that the problem of blank sticking during demoulding is avoided;
sixthly, demoulding: demolding the preliminarily cured plate blanks by using a vacuum chuck, and stacking the plate blanks on a curing partition plate with holes according to the thickness and according to each group of the plate blanks with the thickness not higher than 200 mm;
seventh, steam curing: and (3) putting the demoulded plate blank into an autoclave for maintaining the plate blank, wherein the maintenance process is divided into three stages, namely heating and boosting, constant temperature and pressure and cooling and depressurizing in sequence.
Drying: feeding the steamed and cured plates into a drying kiln one by one through a conveyor, starting a blower and a moisture exhaust fan, evaporating water in the plates by utilizing hot air, and reducing the water content of the plates to be below 10%;
ninthly sand light, cut edge, transport to the production line of cutting edge with fork truck for the panel of accomplishing the stack after will drying, cut the correction to panel deckle edge, via the grinder again, handle panel surface.
Further, in the fourth step, a 9000t press is used for applying pressure of more than 4000t to the stack, and the stack is pressed for 20-25 minutes.
And step (c), in the temperature and pressure raising process, the pressure is raised from 0MPa to 1.0MPa, the time of the stage is 4 hours, the pressure in the constant temperature and pressure process is 1.0MPa, the time is 6 hours, the pressure in the temperature and pressure reducing process is reduced from 1.0MPa to 0MPa, and the time is 2 hours, so that the raw materials in the plate blank are fully reacted to form the stable bainite-removed mullite crystal.
Furthermore, the surface of one side of the concrete companion plate bonded with the concrete is provided with a plurality of grooves, the grooves are in an arc grid shape, the center distance between adjacent grids is 30-70mm, the depth of each groove is 0.6-1.0mm, and the width of each groove is 8-15 mm.
The invention has the technical effects that:
compared with the prior art, the concrete companion plate and the preparation process thereof have the following advantages:
(1) by adjusting the formula of the materials, the proportion of the materials in the concrete is more similar to that of the materials in the concrete, and the bonding strength between the materials is improved.
(2) Meanwhile, a liquid siloxane water repellent is added to form a compact waterproof coating on the surface of the plate, so that the water absorption of the plate can be effectively reduced by more than 20%.
(3) According to the invention, the arc-shaped groove is formed on the contact surface of the plate and the concrete, and the depth of the arc-shaped groove, the center distance between adjacent grids, the width of the groove and the like are designed, so that the prepared plate has higher bonding strength and bending strength, the product quality and the service life are improved, and the contact area and the relative displacement friction force between the plate and the concrete are increased.
Drawings
FIG. 1 is a schematic view of a surface structure of a floor deck according to the present invention, wherein the grooves are in a dot pattern;
FIG. 2 is a schematic view of a surface structure of a floor deck according to the present invention, wherein the grooves are in a square grid pattern;
fig. 3 is a schematic view of the surface structure of the floor deck of the present invention, wherein the grooves are in an arc grid pattern.
In the figure, groove 1, grid center distance L1, and groove width L2.
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 of the present invention are clearly and completely described below with reference to the drawings of the specification.
Example 1:
the concrete companion plate related to the embodiment comprises the following raw materials in parts by weight: 5.2 parts of quartz powder, 4.3 parts of cellulose fiber, 2.2 parts of ultrahigh-strength PVA fiber, 9.5 parts of sulphoaluminate cement, 1.3 parts of silica fume, 1.3 parts of bentonite and 1.3 parts of liquid siloxane water repellent.
A preparation process of a concrete companion plate comprises the following steps:
pulping: putting the raw materials except the liquid siloxane water repellent into a primary storage tank according to the weight ratio, adding water, stirring for 15 minutes, uniformly mixing the slurry, and then introducing the slurry into a secondary storage tank through a slurry pump;
molding: and (3) after the slurry is uniformly stirred, the slurry is pumped into a slurry storage tank within 15 minutes, a liquid siloxane water repellent in specified weight parts is added, the slurry is uniformly stirred, and the slurry is stored for no more than 15 minutes. The slurry is uniformly distributed on the blanket, the running speed of the blanket is ensured to be consistent, a wet plate blank with uniform thickness is obtained, and the surface of the wet plate blank is ensured to be smooth and free of impurities.
And thirdly, stacking: firstly, cutting the longitudinal and transverse edges of the material blank in order, then, orderly stacking the cut material blank on a special backing plate with protruding grains on the surface, and stacking the material blank into a pile;
pressurizing: adopting a gradual slow-discharge pressurizing technology, applying pressure of more than 4000t to the stack by using a 9000t press, pressing for 20 minutes, and pressing the stacked blanks into a blank with a groove on the back;
fifthly, primary maintenance: standing and curing the pressed and formed plate blank for more than 10 hours in a pre-curing kiln at the temperature of 35-40 ℃ to finally solidify cement in the plate, so that the problem of blank sticking during demoulding is avoided;
sixthly, demoulding: demolding the preliminarily cured plate blanks by using a vacuum chuck, and stacking the plate blanks on a curing partition plate with holes according to the thickness and according to each group of the plate blanks with the thickness not higher than 200 mm;
seventh, steam curing: placing the demoulded plate blank into an autoclave for maintaining the plate blank, wherein the maintenance process is divided into three stages, namely heating and boosting, keeping constant temperature and pressure and cooling and reducing pressure in sequence; the pressure is increased from 0MPa to 1.0MPa in the process of temperature rise and pressure rise, the time of the stage is 4 hours, the pressure in the process of constant temperature and pressure is 1.0MPa and the time is 6 hours, the pressure in the process of temperature drop and pressure drop is reduced from 1.0MPa to 0MPa and the time is 2 hours, so that the raw materials in the plate blank are fully reacted to form the stable deice mullite crystal.
Drying: feeding the steamed and cured plates into a drying kiln one by one through a conveyor, starting a blower and a moisture exhaust fan, evaporating water in the plates by utilizing hot air, and reducing the water content of the plates to be less than 10%;
ninthly sand light, cut edge, transport to the production line of cutting edge with fork truck for the panel of accomplishing the stack after will drying, cut the correction to panel deckle edge, via the grinder again, handle panel surface.
The main component siloxane of the liquid siloxane water repellent reacts with the bound water in the inorganic material to generate a silicone resin structure containing Si-O bonds, thereby forming a super hydrophobic and hydrophobic three-dimensional structure. Because siloxane in the water repellent mainly reacts with bound water in inorganic materials (cement), the main component siloxane in the water repellent begins to react with the bound water in the cement after the water repellent is added into the mixed slurry, and experiments are carried out (the density in production is 1.3 g/cm)3The water absorption of the plate without the water repellent is generally about 28%), the shorter the stirring time is, the better the water repellent effect is, but too short a time results in uneven stirring, and when the stirring time is longer than 15 minutes, as shown in table 1, the water repellent effect slips down, so the time for adding the water repellent to the plate blank is preferably 10-15 min.
TABLE 1
Example 2:
the concrete companion plate related to the embodiment comprises the following raw materials in parts by weight: 5 parts of quartz powder, 4 parts of cellulose fiber, 2 parts of ultrahigh-strength PVA fiber, 9 parts of sulphoaluminate cement, 1 part of micro silicon powder, 1 part of bentonite and 1 part of liquid siloxane water repellent. The preparation process of this example is the same as example 1.
Example 3:
the concrete companion plate related to the embodiment comprises the following raw materials in parts by weight: 6 parts of quartz powder, 5 parts of cellulose fiber, 3 parts of ultrahigh-strength PVA fiber, 11 parts of sulphoaluminate cement, 2 parts of micro silicon powder, 2 parts of bentonite and 2 parts of liquid siloxane water repellent. The preparation process of this example is the same as example 1.
Example 4:
the concrete companion plate related to the embodiment comprises the following raw materials in parts by weight: 5.8 parts of quartz powder, 4.7 parts of cellulose fiber, 2.7 parts of ultrahigh-strength PVA fiber, 10 parts of sulphoaluminate cement, 1.8 parts of silica fume, 1.9 parts of bentonite and 1.8 parts of liquid siloxane water repellent. The preparation process of this example is the same as example 1.
Example 5:
in the concrete companion plate of the embodiment, the surface of one side of the concrete companion plate bonded with concrete is provided with a plurality of grooves 1, the grooves 1 are in an arc grid shape, the center distance L1 between adjacent grids is 30-70mm, the depth of each groove 1 is 0.6-1.0mm, and the width L2 of each groove is 8-15 mm.
The arc-shaped latticed grooves are uniformly or irregularly arranged along the longitudinal and transverse directions of the plate.
Experimental example: the influence of the grooves of various types and specifications on the bonding strength of the plate and the concrete is tested, and the specific data is as follows:
the dot pattern shown in fig. 1 has the following test data:
TABLE 1
The test data for the square grid shown in fig. 2 is as follows:
TABLE 2
The test data for the arc grid shown in fig. 3 is as follows:
TABLE 3
By comparing multiple sets of test data, the following conclusions can be drawn: the higher the grid density is, the higher the bonding strength between the plate and the concrete is, but the lower the breaking strength of the plate is; the larger the depth of the grid groove is, the higher the bonding strength between the plate and the concrete is, but the lower the breaking strength of the plate is; the grids uniformly arranged in the longitudinal and transverse directions of the plate have large influence on the flexural strength of the plate, and the irregular grids have small influence on the flexural strength of the plate; the width of the groove has little influence on the bonding strength between the plate and the concrete and the self flexural strength. In multiple groups of test data, the optimal scheme is arc-shaped grids, the center distance L1 between adjacent grids is 50mm, the depth of a groove is 1mm, the width L2 of the groove is 8-15mm, the bonding strength of the plate and concrete can reach 0.2MPa, the bonding strength is improved by 100% on the basis of a common plate, and the flexural strength can reach more than 16 MPa; and the center distance L1 between adjacent grids is 30mm, the depth of the groove is 0.8mm, the width L2 of the groove is 8-15mm, the design ensures that the bonding strength between the plate and the concrete is more than 0.17MPa, and the breaking strength is more than 16 MPa.
The above embodiments are only specific examples of the present invention, and the protection scope of the present invention includes but is not limited to the product forms and styles of the above embodiments, and any suitable changes or modifications made by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.
Claims (7)
1. A concrete companion's board which characterized in that: the weight components of the raw materials are as follows: 5-6 parts of quartz powder, 4-5 parts of cellulose fiber, 2-3 parts of ultrahigh-strength PVA fiber, 9-11 parts of sulphoaluminate cement, 1-2 parts of silica fume, 1-2 parts of bentonite and 1-2 parts of liquid siloxane water repellent;
the preparation method comprises the following steps:
pulping: putting the raw materials except the liquid siloxane water repellent into a primary storage tank according to the weight ratio, adding water, stirring for 10-20 minutes, and after the slurry is uniformly mixed, introducing the slurry into a secondary storage tank through a slurry pump;
molding: after being uniformly stirred, the slurry is pumped into a slurry storage tank within 10 to 20 minutes, and a liquid siloxane water repellent with specified weight is added, the slurry is uniformly stirred, and the slurry is stored for no more than 15 minutes; uniformly distributing the slurry on a blanket, ensuring the running speed of the blanket to be consistent, obtaining a wet plate blank with uniform thickness, and ensuring the surface of the wet plate blank to be smooth and free of impurities;
and thirdly, stacking: firstly, cutting the longitudinal and transverse edges of the material blank in order, then, orderly stacking the cut material blank on a special backing plate with protruding grains on the surface, and stacking the material blank into a pile;
pressurizing: pressing the stacked blanks into a blank with a groove on the back by adopting a gradual slow-discharge pressurizing technology;
fifthly, primary maintenance: standing and curing the pressed and formed plate blank for more than 10 hours in a pre-curing kiln at the temperature of 35-40 ℃ to finally solidify cement in the plate, so that the problem of blank sticking during demoulding is avoided;
sixthly, demoulding: demolding the preliminarily cured plate blanks by using a vacuum chuck, and stacking the plate blanks on a curing partition plate with holes according to the thickness and according to each group of the plate blanks with the thickness not higher than 200 mm;
seventh, steam curing: placing the demoulded plate blank into an autoclave for maintaining the plate blank, wherein the maintenance process is divided into three stages, namely heating and boosting, keeping constant temperature and pressure and cooling and reducing pressure in sequence;
drying: feeding the steamed and cured plates into a drying kiln one by one through a conveyor, starting a blower and a moisture exhaust fan, evaporating water in the plates by utilizing hot air, and reducing the water content of the plates to be below 10%;
ninthly, sanding and trimming, namely transferring the plates which are stacked after being dried to a trimming production line by using a forklift, cutting and correcting burrs of the plates, and treating the surfaces of the plates by using a sander;
the concrete companion plate is characterized in that a plurality of grooves are formed in the surface of one side, bonded with concrete, of the concrete companion plate, the grooves are in an arc grid shape, the center distance between adjacent grids is 30-70mm, the depth of each groove is 0.6-1.0mm, and the width of each groove is 8-15 mm.
2. A concrete couple plate according to claim 1, wherein: the weight components of the raw materials are as follows: 5.2 parts of quartz powder, 4.3 parts of cellulose fiber, 2.2 parts of ultrahigh-strength PVA fiber, 9.5 parts of sulphoaluminate cement, 1.3 parts of silica fume, 1.3 parts of bentonite and 1.3 parts of liquid siloxane water repellent.
3. A concrete couple plate according to claim 1, wherein: the weight components of the raw materials are as follows: 5.8 parts of quartz powder, 4.7 parts of cellulose fiber, 2.7 parts of ultrahigh-strength PVA fiber, 10 parts of sulphoaluminate cement, 1.8 parts of silica fume, 1.9 parts of bentonite and 1.8 parts of liquid siloxane water repellent.
4. A concrete couple plate according to claim 1, wherein: and step (c), increasing the pressure from 0MPa to 1.0MPa in the process of temperature rise and pressure increase, wherein the stage time is 4 hours, the pressure in the process of constant temperature and pressure is 1.0MPa and the time is 6 hours, and the pressure in the process of temperature reduction and pressure reduction is reduced from 1.0MPa to 0MPa and the time is 2 hours, so that the raw materials in the plate blank are fully reacted to form the stable bainite-removed mullite crystal.
5. A concrete couple plate according to claim 1, wherein: the center distance of the adjacent grids is 30-50mm, and the depth of the groove is 0.8-1.0 mm.
6. A concrete companion plate as claimed in claim 1 or 5 wherein: the center distance of the adjacent grids is 50mm, and the depth of the groove is 1.0 mm.
7. A concrete companion plate as claimed in claim 1 or 5 wherein: the center distance of the adjacent grids is 30mm, and the depth of the groove is 0.8 mm.
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| FR2811978A1 (en) * | 2000-07-18 | 2002-01-25 | Lafarge Platres | JOINT COATING FOR A CONSTRUCTION ELEMENT, METHOD FOR PREPARING SAME AND METHOD FOR PRODUCING A STRUCTURE |
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