CN113003997B - Self-luminous light-transmitting concrete wallboard and preparation method thereof - Google Patents
Self-luminous light-transmitting concrete wallboard and preparation method thereof Download PDFInfo
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- CN113003997B CN113003997B CN202110161846.3A CN202110161846A CN113003997B CN 113003997 B CN113003997 B CN 113003997B CN 202110161846 A CN202110161846 A CN 202110161846A CN 113003997 B CN113003997 B CN 113003997B
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- 239000004567 concrete Substances 0.000 title claims abstract description 144
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 84
- 239000000843 powder Substances 0.000 claims abstract description 34
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229920000876 geopolymer Polymers 0.000 claims abstract description 27
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 15
- 239000011707 mineral Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims abstract description 14
- 239000004568 cement Substances 0.000 claims abstract description 12
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 9
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 8
- 239000011734 sodium Substances 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- 239000005995 Aluminium silicate Substances 0.000 claims description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 239000010881 fly ash Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- FNWBQFMGIFLWII-UHFFFAOYSA-N strontium aluminate Chemical class [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Sr+2].[Sr+2] FNWBQFMGIFLWII-UHFFFAOYSA-N 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- YLGXILFCIXHCMC-JHGZEJCSSA-N methyl cellulose Chemical group COC1C(OC)C(OC)C(COC)O[C@H]1O[C@H]1C(OC)C(OC)C(OC)OC1COC YLGXILFCIXHCMC-JHGZEJCSSA-N 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 claims description 3
- 238000005034 decoration Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 10
- 230000006872 improvement Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 238000011031 large-scale manufacturing process Methods 0.000 description 3
- 239000012190 activator Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000013012 foaming technology Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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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
- C04B28/04—Portland cements
-
- 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
- C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
-
- 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
- E04C2/54—Slab-like translucent elements
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/805—Transparent material
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/807—Luminescent or fluorescent materials
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Architecture (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses a self-luminous light-transmitting concrete wallboard and a preparation method thereof, wherein the wallboard comprises a light concrete layer, a luminous layer and a light guide material, the luminous layer is arranged on the light concrete layer, and the light guide material penetrates through the light concrete layer and the luminous layer so as to form a light guide channel in the light concrete layer and the luminous layer; the light concrete layer is made of light concrete, and the light concrete comprises the following components in parts by weight: 30-50 parts of cement, 10-20 parts of mineral powder, 5-10 parts of silica fume, 15-20 parts of water, 0.1-0.3 part of water reducing agent, 50-70 parts of sand and 10-20 parts of artificial lightweight aggregate; the light-emitting layer is made of a light-emitting geopolymer material, and the light-emitting geopolymer material comprises the following components in parts by weight: 30 to 50 portions of metakaolin, 20 to 40 portions of water glass, 25 to 40 portions of luminescent powder and 0.1 to 0.5 portion of dispersant. The self-luminous light-transmitting concrete wallboard is light, high in strength and self-luminous, and can be used for building inner walls and outer walls.
Description
Technical Field
The invention relates to the technical field of concrete wallboards, in particular to a self-luminous light-transmitting concrete wallboard and a preparation method thereof.
Background
Light-transmitting concrete has been widely used in indoor decoration and special architectural design in recent years as a novel decorative building material. The light-transmitting concrete wallboard is manufactured by adopting a prefabricated thin plate form at present, after the light-transmitting concrete wallboard is installed in a dry hanging mode, light is irradiated to the rear side of the light-transmitting concrete wallboard, and light is transmitted to the other end from one end of the wallboard, so that the artistic effect of interior decoration is achieved. The prior light-transmitting concrete can not be integrally used for building outer walls, depends on artificial light sources and is restricted in large-scale use.
Chinese patent CN111236526a discloses a light transparent concrete slab capable of heat preservation and insulation, which comprises a self-foaming microporous structure concrete layer, a first high fluid self-compacting transparent concrete layer and a second high fluid self-compacting transparent concrete layer, wherein the self-foaming microporous structure concrete layer adopts a microporous foaming technology to change the internal structure, so as to reduce the weight, but the strength is affected, and the self-foaming microporous structure concrete layer cannot be used for building external walls.
Disclosure of Invention
The invention aims to solve the technical problem of providing a self-luminous light-transmitting concrete wallboard which is light, high in strength and self-luminous and can be used for building inner walls and outer walls.
The invention also aims to solve the technical problem of providing the self-luminous light-transmitting concrete wallboard which is low in cost.
The invention also aims to solve the technical problem of providing a preparation method of the self-luminous light-transmitting concrete wallboard, which has simple process and low cost and is beneficial to large-scale production.
In order to solve the technical problems, the invention provides a self-luminous light-transmitting concrete wallboard, which comprises a light concrete layer, a luminous layer and a light guide material, wherein the luminous layer is arranged on the light concrete layer, and the light guide material penetrates through the light concrete layer and the luminous layer so as to form a light guide channel in the light concrete layer and the luminous layer; wherein,
the light concrete layer is made of light concrete, and the light concrete comprises the following components in parts by weight: 30-50 parts of cement, 10-20 parts of mineral powder, 5-10 parts of silica fume, 15-20 parts of water, 0.1-0.3 part of water reducing agent, 50-70 parts of sand and 10-20 parts of artificial lightweight aggregate;
the light-emitting layer is made of a light-emitting geopolymer material, and the light-emitting geopolymer material comprises the following components in parts by weight: 30 to 50 portions of metakaolin, 20 to 40 portions of water glass, 25 to 40 portions of luminescent powder and 0.1 to 0.5 portion of dispersant.
As an improvement of the scheme, the cement, the mineral powder and the silica fume are used as cementing materials, wherein the dosage of water is as follows: the dosage of the cementing material is (20-35) = (100).
As an improvement of the scheme, the cement is early-strength portland cement;
the fineness of the mineral powder is 500-700 m 2 /kg。
As an improvement of the scheme, the artificial lightweight aggregate is fly ash ceramsite with the particle size of less than or equal to 10 mm;
the amount of sand used is: the amount of the artificial lightweight aggregate is = (4-6): 1.
as an improvement of the above scheme, the dosage of metakaolin: amount of water glass = (3-6): (2-5).
As an improvement of the above scheme, the preparation method of the metakaolin comprises the following steps: calcining kaolin serving as a raw material at 700-850 ℃ for 1.5-4 hours;
the sodium silicate is Na sodium silicate, and the modulus of the Na sodium silicate is 1.2-1.5.
As an improvement of the scheme, the luminescent powder is a long-afterglow luminescent material of long strontium aluminate series, and the grain diameter of the luminescent powder is 100-250 meshes;
the dispersant is methyl cellulose ether series dispersant.
As an improvement of the above scheme, the thickness of the lightweight concrete layer: thickness of light-emitting layer = (8 to 9): (1-2).
As an improvement of the scheme, the light guide material is made of PMMA, the light transmittance is more than or equal to 93%, and the light guide material is of a strip-shaped structure and is perpendicular to the light concrete layer and the light emitting layer.
Correspondingly, the invention also provides a preparation method of the self-luminous light-transmitting concrete wallboard, which is characterized by comprising the following steps:
s1, manufacturing a mold, wherein the mold comprises a bottom plate and side plates, the side plates are arranged on the periphery of the bottom plate and enclose the bottom plate to form an accommodating cavity, the bottom plate is provided with a plurality of mounting holes, and the height of the accommodating cavity is h;
s2, inserting the light guide material into the mounting hole, wherein the height of the exposed part of the light guide material is k, and k is more than or equal to h;
s3, injecting light concrete into the containing cavity, and curing to form a light concrete layer, wherein the thickness of the light concrete layer is m, and m = (0.8-0.9) × h;
s4, injecting the light-emitting geopolymer material into the accommodating cavity, and forming a light-emitting layer on the light concrete layer after curing, wherein the thickness of the light concrete layer is as follows: thickness of light-emitting layer = (8 to 9): (1-2).
The implementation of the invention has the following beneficial effects:
the lightweight concrete has light weight and high strength, meets the requirement of compressive strength of the lightweight concrete wallboard, effectively reduces the dead weight of the lightweight concrete wallboard, and is suitable for being used as a material of a lightweight concrete layer. The luminous geopolymer material has good weather resistance, can emit light at night after absorbing sunlight in the daytime, has long afterglow time and high light brightness, and can be used as decoration of an outer wall of a building and a light source for indoor decoration at night.
The self-luminous light-transmitting concrete wallboard forms a composite multifunctional wallboard through mutual matching of the light concrete layer, the luminous layer and the light guide material, and has the functions of bearing, filling and decorating, wherein the light weight and the high strength are basic performances of a substrate of the concrete wallboard, and the light-emitting light-transmitting property is a decorative characteristic of the concrete wallboard.
The preparation method is simple, low in cost and beneficial to large-scale production.
Drawings
FIG. 1 is a schematic view of the self-luminous and light-transmitting concrete wall panel of the present invention;
FIG. 2 is a flow chart of the preparation of the self-luminous translucent concrete wall panel of the present invention;
FIG. 3 is a schematic view of the present invention for preparing a self-luminous translucent concrete wallboard mold;
FIG. 4 is a schematic view of the present invention after insertion of the luminescent material in the die mounting hole;
FIG. 5 is a schematic representation of the lightweight concrete of the present invention after curing in a mold;
FIG. 6 is a schematic representation of a luminescent geopolymer material of the present invention after curing in a mold.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the self-luminous light-transmitting concrete wallboard provided by the invention comprises a light concrete layer 1, a light-emitting layer 2 and a light-guiding material 3, wherein the light-emitting layer 2 is arranged on the light concrete layer 1, and the light-guiding material 3 penetrates through the light concrete layer 1 and the light-emitting layer 2 so as to form a light-guiding channel in the light concrete layer 1 and the light-emitting layer 2; the light concrete layer 1 is made of light concrete, and the light concrete comprises the following components in parts by weight: 30 to 50 parts of cement, 10 to 20 parts of mineral powder, 5 to 10 parts of silica fume, 15 to 20 parts of water, 0.1 to 0.3 part of water reducing agent, 50 to 70 parts of sand and 10 to 20 parts of artificial lightweight aggregate; the luminescent layer 2 is made of a luminescent geopolymer material, and the luminescent geopolymer material comprises the following components in parts by weight: 30 to 50 portions of metakaolin, 20 to 40 portions of water glass, 25 to 40 portions of luminescent powder and 0.1 to 0.5 portion of dispersant.
The lightweight concrete has light weight and high strength, meets the requirement of compressive strength of the lightweight concrete wallboard, effectively reduces the dead weight of the lightweight concrete wallboard, and is suitable for being used as a material of a lightweight concrete layer.
The luminous geopolymer material has good weather resistance, can emit light at night after absorbing sunlight in the daytime, has long afterglow time and high light brightness, and can be used as decoration of an outer wall of a building and a light source for indoor decoration at night.
According to the characteristics of the light concrete layer and the luminescent layer, the self-luminous light-transmitting concrete wallboard has the effects of bearing, filling and decoration, the thickness proportion of the light concrete layer and the luminescent layer is limited, and particularly, if the thickness of the light concrete layer is too low, the bearing capacity of the wallboard is insufficient, and the structural requirement is not met; on the contrary, if the thickness of the light concrete layer is too large, the thickness of the light emitting layer is too small, and the light emitting effect is affected. Preferably, the thickness of the lightweight concrete layer is: thickness of light-emitting layer = (8 to 9): (1-2). More preferably, the thickness of the lightweight concrete layer is: thickness of light emitting layer =9:1.
specifically, the total thickness of the wallboard is 20-30 cm, wherein the thickness of the light concrete layer is 16-18 cm, and the thickness of the luminous layer is 2-4 cm.
The existing light-transmitting concrete wallboard is mainly used for decoration, is not generally used as a structural member, and has the thickness of 30mm. The self-luminous light-transmitting concrete wallboard can be used as a structural member, and the thickness is 20-30 cm according to different positions of a wall body by referring to the thickness of the existing building outer wall (filling wall). The concrete strength grade is generally C30, the strength of the light concrete layer is C50, and under the composite action of the light concrete layer, the luminous and light-transmitting concrete wallboard has the comprehensive compressive strength not lower than that of the existing common concrete wallboard.
Because the invention adopts the light concrete layer with thicker thickness as the base layer of the cavity, the total thickness of the wallboard of the invention is not too thick, the wallboard can have the strength of the conventional concrete wallboard,
the light emitted by the luminous layer at night is transmitted to the inside of the light concrete layer through the light guide material and is transmitted to the inside of the building through the light concrete layer, so that the effects of decoration and embellishment are achieved.
The light guide material is made of PMMA, the light transmittance is more than or equal to 93%, in order to fully play the role of the light guide material, the light guide material is of a strip-shaped structure, is perpendicular to the light concrete layer and the light emitting layer, has the diameter of 2mm, 3mm and 5mm, and can play a better role in decoration and decoration by matching three light guide materials with different diameters.
In order to further improve the light transmission uniformity of the wall board, the light guide materials are uniformly distributed, and the distance is 8-12 mm. Preferably, the interval between the light guide materials is 9 to 11mm.
The invention takes cement, mineral powder and silica fume as cementing materials, wherein, in order to exert the function of the cementing materials, the water consumption is required to be controlled: the dosage of the cementing material is (20-35) = (100). If the weight ratio of the water to the cementing material is too low, namely the proportion of the water is too low, the viscosity of the lightweight concrete material is too high, the construction is not easy, the unit dosage of the cementing material is large, the lightweight concrete material is easy to crack and the like; if the weight ratio of the water to the cementing material is too low, namely the weight ratio of the water is too high, the compressive strength of the lightweight concrete material is reduced, and the requirement is not met. Preferably, the amount of water used is: the dosage of the cementing material (cement, mineral powder and silica fume) = (25-30) = (100).
The cement of the present invention is early strength Portland cement, but is not limited thereto.
The fineness of the mineral powder is more than or equal to 500m 2 Kg, the mineral powder according to the invention as one of the binding materials, if its fineness is less than 500m 2 The activity index is lower, so that the concrete can not fill other cementing materials and can not meet the theoretical requirement of closest packing, and the concrete with higher strength can not be prepared under the condition; if the fineness of the mineral powder is more than 700m 2 And/kg, the grinding cost is high, and the cost is increased. Preferably, the fineness of the mineral powder is 500-700 m 2 /kg。
The using amount of the sand is 50-70 parts, the sand plays a role of a framework in the concrete and is used for adjusting the volume change of the concrete and reducing the cost, and if the using amount of the sand is too small, the sand cannot play an effective role; if the amount of sand is too large, the strength and workability of the concrete are affected. Preferably, the amount of sand is 55 to 65 parts, illustratively 55 parts, 60 parts, 65 parts, but is not limited thereto.
The artificial lightweight aggregate is used in 10-20 weight portions and serves as skeleton in concrete to regulate the volume change of concrete and reduce the dead weight of concrete. Specifically, the artificial lightweight aggregate is made of fly ash ceramsite, and the artificial lightweight aggregate is low in price, low in cost and not greatly influenced on strength. Preferably, the grain diameter of the fly ash ceramsite is less than or equal to 10mm.
In order to exert the function of aggregate to obtain lightweight, high-strength concrete, the amount of sand used needs to be controlled: the amount of the artificial lightweight aggregate is = (4-6): 1. preferably, the amount of sand used is: the dosage of the artificial lightweight aggregate is = (4.5-5.5): 1.
in the lightweight concrete, the amount of the water reducing agent is 0.1-0.3 part, and the water reducing agent is mainly used for adjusting the flowing property of the concrete. Preferably, the water reducing agent is a polycarboxylic acid series high-efficiency water reducing agent.
The lightweight concrete provided by the invention takes cement, mineral powder and silica fume as cementing materials, and is compounded and used according to a certain proportion, so that the comprehensive cost of the cementing materials is reduced on the premise of meeting the use functions of strength, durability and the like. In addition, the water and the cementing material are mixed according to a certain proportion, so that the strength requirement of the concrete is ensured.
The metakaolin is used in 30-50 weight portions and is excited with water glass to form high strength geopolymer with compact inner structure. The geopolymer formed by the invention is white and has semi-transparency, and can form a self-luminous geopolymer material after a proper amount of luminescent powder is added.
In order to form geopolymer material with optimal mechanical properties, the dosage ratio of metakaolin and water glass also needs to be controlled. Specifically, the dosage of metakaolin is as follows: amount of water glass = (3-6): (2-5); when the amount of the water glass is less, the metakaolin cannot be fully excited to form geopolymer, and when the amount of the water glass is too much, the metakaolin cannot be fully excited to form geopolymer. Preferably, the amount of metakaolin used is: amount of water glass = (4-5): (3-4);
the preparation method of the metakaolin comprises the following steps: kaolin is used as a raw material and is calcined for 1.5 to 4 hours at the temperature of between 700 and 850 ℃. Wherein, the calcination temperature and the calcination time of the metakaolin have direct influence on the performance of geopolymer, the metakaolin calcined at the temperature below 600 ℃ or above 900 ℃ has no volcanic ash activity, can not be coagulated and hardened under the action of alkali activator (water glass), and can not form reliable strength and durabilityThe material of (2). Similarly, metakaolin prepared with a calcination time of less than 1.5 hours or more than 5 hours does not have pozzolanic activity, does not set and harden under the action of an alkali activator (water glass), and cannot form a material with reliable strength and durability. Specifically, the metakaolin of the invention takes the kaolin as a raw material and is calcined for 1.5 hours, 2 hours, 2.5 hours, 3 hours, 3.5 hours or 4 hours at 600 ℃, 650 ℃, 700 ℃, 750 ℃, 800 ℃, 850 ℃ or 900 ℃. Preferably, the metakaolin of the invention takes the kaolin as the raw material and is calcined for 2 to 3 hours at the temperature of 700 to 850 ℃, thus reducing the calcination temperature and the calcination time of the metakaolin and obtaining Ca (OH) which is easy to be added 2 Excited metakaolin.
The commercially available water glass is K water glass, na water glass, composite water glass and the like, and has different performances and different prices. The water glass of the invention is Na water glass with low price, wherein, the modulus of the Na water glass mainly influences the hardening time and the strength of the geopolymer, and the luminous layer of the invention mainly plays a decorative role and does not require the strength, so the modulus of the Na water glass of the invention can be selected in a wider range. In order to reduce the cost and obtain a geopolymer with good performance, the modulus of the Na water glass is 1.2-1.5.
The dosage of the luminescent powder is 25-40 parts, and the luminescent powder is added into the geopolymer, so that the luminescent layer can absorb solar energy and store the solar energy in the daytime and release the solar energy in the form of visible light at night to play a role of a light source, thereby improving the decorative effect of the concrete wallboard.
The luminescent powder of the invention is a long afterglow luminescent material, preferably, the luminescent powder of the invention is a long afterglow luminescent material of long strontium aluminate series. Among the different luminescent materials, the strontium aluminate series luminescent materials have high brightness and optimal afterglow time. In order to ensure the best luminous effect and more reasonable product economy, the particle size of the luminous powder is 100-250 meshes. If the particle size of the luminescent powder is smaller than 100 meshes, the particle size of the luminescent powder is too large, and the luminescent powder is not uniformly mixed in the geopolymer, so that the luminescent layer of the invention emits light unevenly; if the particle size of the luminescent powder is larger than 250 mesh, the particle size of the luminescent powder is too small, and the cost increases.
The dispersant is mainly used for improving the uniformity of the luminescent powder in the geopolymer, preferably, the dispersant of the invention is methyl cellulose ether series dispersant, and the dispersant has good dispersing effect and low price.
The self-luminous light-transmitting concrete wallboard disclosed by the invention is formed into a composite multifunctional wallboard through the mutual matching of the light concrete layer, the luminous layer and the light guide material, and has the functions of bearing, filling and decoration, wherein the light weight and the high strength are basic performances of a substrate of the concrete wallboard, and the light emission and the light transmission are decoration characteristics of the concrete wallboard.
Referring to fig. 2, the invention also discloses a preparation method of the self-luminous light-transmitting concrete wallboard, which comprises the following steps;
s1, manufacturing a mold
Referring to fig. 3, the mold 4 includes a bottom plate 41 and side plates 42, and the side plates 42 are disposed around the bottom plate 41 and enclose the bottom plate 41 to form a receiving cavity. The bottom plate 41 is provided with a plurality of mounting holes 411, and the mounting holes 411 are used for fixing the light guide material. Wherein, the height of the accommodating cavity is h.
Specifically, the containing cavity has an area of 50cm × 50cm and a height of 20cm, that is, the prepared wall board has an area of 50cm × 50cm and a thickness of 20cm, but is not limited thereto.
S2, inserting the light guide material into the mounting hole of the die;
referring to fig. 4, the light guide material 3 is inserted into the mounting hole 411 of the mold 4, and after the light guide material 3 is inserted into the mounting hole 411, the height of the exposed part of the light guide material 3 is the same as or higher than the height of the accommodating cavity, that is, the height of the exposed part of the light guide material 3 is k, and k is not less than h.
S3, injecting the light concrete into an accommodating cavity of the mold, and curing to form a light concrete layer;
referring to fig. 5, lightweight concrete is injected into the accommodating cavity of the mold 4 and cured to form the lightweight concrete layer 1. The light guide material 3 is fixed in the lightweight concrete, penetrates through the whole lightweight concrete layer 1, and can transmit light from one side of the lightweight concrete layer 1 to the other side of the lightweight concrete layer 1, so that the light guide material has the functions of light guide and light transmission. Wherein the thickness of the light concrete layer 1 is m, m = (0.8-0.9) × h; that is, a part of the light guide material 3 is exposed.
S4, injecting the luminous geopolymer material into an accommodating cavity of the mold, and forming a luminous layer on the light concrete layer after curing;
referring to fig. 6, a luminescent geopolymer material is injected into a receiving cavity of a mold 4, and a luminescent layer 2 is formed on a lightweight concrete layer 1 after curing. The part of the light guide material 3 exposed out is also fixed in the light emitting layer 2, and light emitted by the light emitting layer 2 can be transmitted to the light concrete layer 1 through the light guide material 3 and transmitted to the interior of the building through the light concrete layer 1, so that the light guide material plays roles of decoration and decoration.
Wherein, the thickness of light concrete layer: thickness of light-emitting layer = (8 to 9): (1-2). More preferably, the thickness of the light concrete layer is as follows: thickness of light emitting layer =9:1.
the preparation method is simple, low in cost and beneficial to large-scale production.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (7)
1. A self-luminous light-transmitting concrete wallboard is characterized by comprising a light concrete layer, a light-emitting layer and a light-guiding material, wherein the light-emitting layer is arranged on the light concrete layer, and the light-guiding material penetrates through the light concrete layer and the light-emitting layer so as to form a light-guiding channel in the light concrete layer and the light-emitting layer; wherein,
the light concrete layer is made of light concrete, and the light concrete comprises the following components in parts by weight: 30 to 50 parts of cement, 10 to 20 parts of mineral powder, 5 to 10 parts of silica fume, 15 to 20 parts of water, 0.1 to 0.3 part of water reducing agent, 50 to 70 parts of sand and 10 to 20 parts of artificial lightweight aggregate;
the light-emitting layer is made of a light-emitting geopolymer material, and the light-emitting geopolymer material comprises the following components in parts by weight: 30 to 50 parts of metakaolin, 20 to 40 parts of water glass, 25 to 40 parts of luminescent powder and 0.1 to 0.5 part of dispersant; the cement, the mineral powder and the silica fume are used as cementing materials, wherein the dosage of water is as follows: the dosage of the cementing material is not less than 20 and not more than 35 and is 100;
the thickness of the light concrete layer is as follows: thickness of light-emitting layer = (8~9): (1~2);
the light guide material is made of PMMA, the light transmittance is more than or equal to 93%, and the light guide material is of a strip-shaped structure and is perpendicular to the light concrete layer and the light emitting layer.
2. The self-luminous light-transmitting concrete wallboard of claim 1, wherein the cement is early strength portland cement;
the fineness of the mineral powder is 500 to 700m 2 /kg。
3. The self-luminous light-transmitting concrete wallboard of claim 1, wherein the artificial lightweight aggregate is fly ash ceramsite with particle size less than or equal to 10 mm;
the amount of sand used is: amount of artificial lightweight aggregate = (4~6): 1.
4. the self-luminous light-transmitting concrete wallboard of claim 1 wherein the amount of metakaolin: amount of water glass = (3~6): (2~5).
5. The self-luminous translucent concrete wall panel of claim 1 or 4, wherein the metakaolin is prepared by the following steps: calcining kaolin serving as a raw material at the temperature of 700 to 850 ℃ for 1.5 to 4 hours;
the sodium silicate is Na sodium silicate, and the modulus of the Na sodium silicate is 1.2 to 1.5.
6. The self-luminous translucent concrete wallboard of claim 1, wherein the luminescent powder is a long-afterglow luminescent material of long strontium aluminate series, the grain size is 100 to 250 meshes;
the dispersant is methyl cellulose ether series dispersant.
7. A method of making the self-luminous translucent concrete wallboard of any one of claims 1~6, comprising:
s1, manufacturing a mould, wherein the mould comprises a bottom plate and side plates, the side plates are arranged on the periphery of the bottom plate and surround with the bottom plate to form an accommodating cavity, the bottom plate is provided with a plurality of mounting holes, and the height of the accommodating cavity is h;
s2, inserting the light guide material into the mounting hole, wherein the height of the exposed part of the light guide material is k, and k is more than or equal to h;
s3, injecting light concrete into the accommodating cavity, and curing to form a light concrete layer, wherein the thickness of the light concrete layer is m, and m is (0.8 to 0.9) h;
s4, injecting the light-emitting geopolymer material into the accommodating cavity, and forming a light-emitting layer on the light concrete layer after curing, wherein the thickness of the light concrete layer is as follows: thickness of light-emitting layer = (8~9): (1~2).
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