CN110509425B - Concrete prefabricated wallboard and production process thereof - Google Patents
Concrete prefabricated wallboard and production process thereof Download PDFInfo
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- CN110509425B CN110509425B CN201910796096.XA CN201910796096A CN110509425B CN 110509425 B CN110509425 B CN 110509425B CN 201910796096 A CN201910796096 A CN 201910796096A CN 110509425 B CN110509425 B CN 110509425B
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- 239000004567 concrete Substances 0.000 title claims abstract description 151
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 73
- IPCSVZSSVZVIGE-UHFFFAOYSA-M hexadecanoate Chemical compound CCCCCCCCCCCCCCCC([O-])=O IPCSVZSSVZVIGE-UHFFFAOYSA-M 0.000 claims abstract description 29
- BEJNERDRQOWKJM-UHFFFAOYSA-N kojic acid Chemical compound OCC1=CC(=O)C(O)=CO1 BEJNERDRQOWKJM-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229960004705 kojic acid Drugs 0.000 claims abstract description 29
- WZNJWVWKTVETCG-UHFFFAOYSA-N kojic acid Natural products OC(=O)C(N)CN1C=CC(=O)C(O)=C1 WZNJWVWKTVETCG-UHFFFAOYSA-N 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000002787 reinforcement Effects 0.000 claims abstract description 10
- QEOWFDYSNYCPRK-UHFFFAOYSA-N OCC[Na] Chemical compound OCC[Na] QEOWFDYSNYCPRK-UHFFFAOYSA-N 0.000 claims abstract description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 60
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 50
- 239000000843 powder Substances 0.000 claims description 25
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 21
- 239000010881 fly ash Substances 0.000 claims description 21
- 239000004576 sand Substances 0.000 claims description 21
- 239000000741 silica gel Substances 0.000 claims description 21
- 229910002027 silica gel Inorganic materials 0.000 claims description 21
- 239000010425 asbestos Substances 0.000 claims description 16
- 229910052895 riebeckite Inorganic materials 0.000 claims description 16
- 229940045998 sodium isethionate Drugs 0.000 claims description 16
- LADXKQRVAFSPTR-UHFFFAOYSA-M sodium;2-hydroxyethanesulfonate Chemical compound [Na+].OCCS([O-])(=O)=O LADXKQRVAFSPTR-UHFFFAOYSA-M 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 12
- 239000011178 precast concrete Substances 0.000 claims description 12
- TVQLLNFANZSCGY-UHFFFAOYSA-N disodium;dioxido(oxo)tin Chemical compound [Na+].[Na+].[O-][Sn]([O-])=O TVQLLNFANZSCGY-UHFFFAOYSA-N 0.000 claims description 10
- 229940079864 sodium stannate Drugs 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000006082 mold release agent Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 14
- 239000007788 liquid Substances 0.000 description 11
- 239000011440 grout Substances 0.000 description 8
- 238000005336 cracking Methods 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000007655 standard test method Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- DNTHHIVFNQZZRD-CYYJNZCTSA-N norbormide Chemical compound C=1C=CC=CC=1C(C=1N=CC=CC=1)(O)C1=CC2C(C(NC3=O)=O)C3C1\C2=C(C=1N=CC=CC=1)/C1=CC=CC=C1 DNTHHIVFNQZZRD-CYYJNZCTSA-N 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- 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
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
-
- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- 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
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
Abstract
The invention relates to the field of prefabricated wallboards, and provides a concrete prefabricated wallboard and a production process thereof aiming at the problem of uneven pouring, wherein the technical scheme is as follows: the method comprises the following steps: s1, arranging a mold frame; s2, prefabricating a reinforcement cage in the mold frame; s3, pouring concrete slurry: pouring concrete slurry along the edge of the primary prefabricated wall board gradually towards the center of the primary prefabricated wall board to form a middle-grade prefabricated wall board; s4, forming treatment; s5, demolding and maintaining; the concrete slurry comprises the following components in parts by weight: 100 parts of cement; 400 portions of coarse aggregate; 200 portions and 300 portions of fine aggregate; 100 portions of water and 120 portions of water; 15-25 parts of kojic acid palmitate; 8-10 parts of hydroxyethyl sodium sulfonate; the concrete slurry is poured gradually towards the center of the primary prefabricated wallboard along the edge of the primary prefabricated wallboard, so that gaps at the edge of the primary prefabricated wallboard are filled, and the concrete slurry is uniformly distributed in the primary prefabricated wallboard.
Description
Technical Field
The invention relates to the field of prefabricated wallboards, in particular to a concrete prefabricated wallboard and a production process thereof.
Background
The precast concrete wallboard is a reinforced concrete plate-type member generally used for building assembly, when the external temperature reaches below 0 ℃, the outer surface of the precast concrete wallboard which is in direct contact with the outside is easy to crack due to the influence of the temperature, and once the crack is serious, the use of the precast concrete wallboard is seriously influenced.
When generally making precast concrete wallboard, often adopt the pedestal method, select a fixed local shaping and maintenance, supply required material and wallboard equipment to wallboard shaping department and make, to the mould concreting thick liquid in-process, the concrete thick liquid is by mould central authorities department flow direction edge, because the speed that flows to mould edge reduces gradually, lead to the difficult edge that fills up the mould of concrete thick liquid, make to pour inhomogeneously, consequently, the space of improvement in addition.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide a production process of a concrete prefabricated wall board, which has the advantage of uniform pouring.
In order to achieve the purpose, the invention provides the following technical scheme:
a production process of a concrete prefabricated wall panel comprises the following steps:
s1, arranging a mold frame;
s2, prefabricating a reinforcement cage in the mold frame, and specifically operating as follows:
laying a reinforcement cage in the mold frame to form a primary prefabricated wall panel;
s3, pouring concrete slurry, and specifically operating as follows:
pouring concrete slurry along the edge of the primary prefabricated wall board gradually towards the center of the primary prefabricated wall board to form a middle-grade prefabricated wall board;
s4, forming treatment, which comprises the following specific operations:
performing molding treatment by vibrating the middle-grade prefabricated wallboard;
s5, demolding and maintaining, which specifically comprises the following steps:
separating the formed middle-grade prefabricated wallboard from the mold frame, and maintaining to form a concrete wallboard;
the concrete slurry comprises the following components in parts by weight:
100 parts of cement;
400 portions of coarse aggregate;
200 portions and 300 portions of fine aggregate;
100 portions of water and 120 portions of water;
15-25 parts of kojic acid palmitate;
8-10 parts of hydroxyethyl sodium sulfonate.
By adopting the technical scheme, the concrete slurry is poured from the edge of the primary prefabricated wall board to the center of the primary prefabricated wall board gradually, so that gaps at the edge of the primary prefabricated wall board are filled, the contact area between the concrete slurry and the primary prefabricated wall board is increased, and the concrete slurry is uniformly distributed in the primary prefabricated wall board;
the reinforcing cage is laid in the mould frame to form a primary prefabricated wallboard, so that the tensile strength of the primary prefabricated wallboard is improved;
the crack between the coarse aggregate and the fine aggregate is filled with the kojic acid palmitate by adding the kojic acid palmitate into the concrete slurry, so that the brittleness point of the concrete slurry is reduced, the frost resistance of the concrete slurry is better, and the frost crack of the concrete wallboard due to lower external temperature is reduced;
by adding the sodium isethionate to match with the kojic acid palmitate in a specific proportion, the fluidity of the kojic acid palmitate is increased, the kojic acid palmitate can better flow into gaps between the coarse aggregates and the fine aggregates, the effect of reducing the brittle point of the concrete grout by the kojic acid palmitate is better, the brittle point of the concrete grout is further reduced, and the concrete wallboard is less prone to cracking.
The invention is further configured to: in step S2, during the process of laying the reinforcement cage in the mold frame, a mold release agent is coated in the mold frame.
By adopting the technical scheme, the release agent is coated in the mold frame, so that the finally-solidified concrete wallboard is easier to separate from the mold frame and is not easy to wear.
The invention is further configured to: the concrete slurry also comprises the following components in parts by weight:
8-15 parts of silicon micropowder.
Through adopting above-mentioned technical scheme, through adding the silica powder, improve concrete slurry's thermal conductivity and crushing resistance for the comparatively even dispersion of heat in the concrete slurry reduces the crack of concrete slurry because heat distributes the inequality and produces.
The invention is further configured to: the concrete slurry also comprises the following components in parts by weight:
5-10 parts of sodium stannate.
Through adopting above-mentioned technical scheme, through adding sodium stannate, better reduction the brittle point of concrete slurry for the concrete slurry is difficult for the frost crack, reduces the condition that concrete wallboard is difficult for the fracture more.
The invention is further configured to: the fine aggregate comprises talcum powder, fly ash, silica gel powder and fine sand, and the mass ratio of the talcum powder to the fly ash to the silica gel powder to the fine sand is 22: 18: 14: 46.
by adopting the technical scheme, the mass ratio of the talcum powder to the fly ash to the silica gel powder to the fine sand is 22: 18: 14: and 46, improving the heat resistance of the concrete grout, so that the concrete grout is relatively stable.
The invention is further configured to: the concrete slurry also comprises the following components in parts by weight:
10-20 parts of iron powder.
Through adopting above-mentioned technical scheme, through adding the iron powder for the structural strength of concrete slurry preferred makes the compressive capacity improve, and then makes the concrete wallboard be difficult for receiving the external impact and the condition of fracture.
The invention is further configured to: the concrete slurry also comprises the following components in parts by weight:
5-12 parts of asbestos fiber;
the length of the asbestos fiber is 10-18 mm.
Through adopting above-mentioned technical scheme, through adding asbestos fibre to the concrete thick liquid for the toughness of concrete thick liquid increases, improves the shock resistance of concrete thick liquid, and then makes difficult deformation after the concrete thick liquid cooling.
The invention is further configured to: the preparation method of the concrete slurry comprises the following steps:
a. mixing cement and water uniformly to form a concrete premix;
b. adding fine aggregate, sodium isethionate and kojic acid palmitate into the concrete premix, and uniformly stirring to form a concrete mixture;
c. adding coarse aggregate into the concrete mixture, and uniformly stirring to form concrete slurry.
By adopting the technical scheme, cement and water are mixed firstly to form a plastic concrete premix, fine aggregates, sodium isethionate and kojic acid palmitate are added into the concrete premix to be mixed, the condition that the addition of the coarse aggregates affects the uneven mixing of the kojic acid palmitate and the sodium isethionate is avoided, and then the coarse aggregates are added into the concrete mixture, so that the kojic acid palmitate is better filled in gaps between the coarse aggregates and the fine aggregates, and concrete grout is not easy to frost crack.
Aiming at the defects in the prior art, the second purpose of the invention is to provide a concrete prefabricated wall panel which has the advantage of uniform quality.
In order to achieve the purpose, the invention provides the following technical scheme:
a concrete prefabricated wall panel is prepared by the production process of the concrete prefabricated wall panel.
Through adopting above-mentioned technical scheme, begin to pour gradually and pour towards primary prefabricated wallboard center along the edge of primary prefabricated wallboard through the concrete thick liquid, fill the gap at primary prefabricated wallboard edge, increase the area of contact between concrete thick liquid and the primary prefabricated wallboard for the concrete thick liquid distributes comparatively evenly in primary prefabricated wallboard, and then makes the concrete thick liquid distribute comparatively even in primary prefabricated wallboard quality.
In conclusion, the invention has the following beneficial effects:
1. pouring is gradually carried out along the edge of the primary prefabricated wall board to the center of the primary prefabricated wall board through the concrete grout, gaps at the edge of the primary prefabricated wall board are filled, the contact area between the concrete grout and the primary prefabricated wall board is increased, and the concrete grout is uniformly distributed in the primary prefabricated wall board;
2. the crack between the coarse aggregate and the fine aggregate is filled with the kojic acid palmitate by adding the kojic acid palmitate into the concrete slurry, so that the brittleness point of the concrete slurry is reduced, the frost resistance of the concrete slurry is better, and the frost crack of the concrete wallboard due to lower external temperature is reduced;
3. by adding the iron powder, the concrete slurry has better structural strength, the compressive capacity is improved, and the concrete wallboard is not easy to crack due to external impact.
Drawings
Fig. 1 is a schematic flow chart of a concrete prefabricated wall panel production process according to the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
In the following examples, the cement is H102 cement available from comet new materials science and technology ltd.
In the following examples, the coarse aggregate was gravel sold by Shijiazhuan Yunjiang mineral products trading Co.
In the following examples, the fine aggregate is a mixture sold by eight metallurgy engineering industries, ltd, Shenzhen.
In the following examples, as the kojic acid palmitate, kojic acid palmitate sold by Saintan Biotech Co., Ltd is used.
In the following examples, sodium isethionate was sodium isethionate sold by zhengzhou xinhao chemical products limited.
In the following examples, iron powder sold by Shijiazhuan Xinbo mineral products Co.
In the following examples, asbestos fibers are used which are sold by Ling sho Xin Binxian processing plants.
In the following examples, the silica powder used was W63-W0.5 silica powder sold by Jinying abrasives science and technology Co., Ltd, Dongguan.
In the following examples, sodium stannate is sold by the widely enriched industries and businesses in the Jinshu district of Zheng Zhou.
Example 1
A concrete slurry is prepared by the following steps:
a. adding 100kg of cement and 100kg of water into a stirring kettle, stirring at the rotating speed of 70r/min for 15min to form a concrete premix;
b. adding 200kg of fine aggregate, 8kg of hydroxyethyl sodium sulfonate and 15kg of kojic acid palmitate into a stirring kettle, stirring at the rotating speed of 100r/min for 10min to form a concrete mixture;
c. 300kg of coarse aggregate is added into a stirring kettle, the rotating speed is 60r/min, the stirring is carried out for 10min, concrete slurry is formed, the rotating speed is 30r/min, and the stirring is continuously carried out for 5 min.
The fine aggregate of the embodiment comprises talcum powder, fly ash, silica gel powder and fine sand, wherein the mass ratio of the talcum powder to the fly ash to the silica gel powder to the fine sand is 22: 18: 14: 46.
example 2
a. Adding 100kg of cement and 110kg of water into a stirring kettle, stirring at the rotating speed of 70r/min for 15min to form a concrete premix;
b. adding 250kg of fine aggregate, 9kg of sodium isethionate and 20kg of kojic acid palmitate into a stirring kettle, stirring at the rotating speed of 100r/min for 10min to form a concrete mixture;
c. 350kg of coarse aggregate is added into a stirring kettle, the rotating speed is 60r/min, the stirring is carried out for 10min, concrete slurry is formed, the rotating speed is 30r/min, and the stirring is continuously carried out for 5 min.
The fine aggregate of the embodiment comprises talcum powder, fly ash, silica gel powder and fine sand, wherein the mass ratio of the talcum powder to the fly ash to the silica gel powder to the fine sand is 22: 18: 14: 46.
example 3
a. Adding 100kg of cement and 120kg of water into a stirring kettle, stirring at the rotating speed of 70r/min for 15min to form a concrete premix;
b. adding 300kg of fine aggregate, 10kg of sodium isethionate and 25kg of kojic acid palmitate into a stirring kettle, stirring at the rotating speed of 100r/min for 10min to form a concrete mixture;
c. adding 400kg of coarse aggregate into a stirring kettle, stirring for 10min at the rotating speed of 60r/min to form concrete slurry, and continuously stirring for 5min at the rotating speed of 30 r/min.
The fine aggregate of the embodiment comprises talcum powder, fly ash, silica gel powder and fine sand, wherein the mass ratio of the talcum powder to the fly ash to the silica gel powder to the fine sand is 22: 18: 14: 46.
example 4
a. Adding 100kg of cement and 105kg of water into a stirring kettle, stirring at the rotating speed of 70r/min for 15min to form a concrete premix;
b. adding 280kg of fine aggregate, 9kg of sodium isethionate and 22kg of kojic acid palmitate into a stirring kettle, stirring at the rotating speed of 100r/min for 10min to form a concrete mixture;
c. 375kg of coarse aggregate is added into a stirring kettle, the rotating speed is 60r/min, the stirring is carried out for 10min, concrete slurry is formed, the rotating speed is 30r/min, and the stirring is continuously carried out for 5 min.
The fine aggregate of the embodiment comprises talcum powder, fly ash, silica gel powder and fine sand, wherein the mass ratio of the talcum powder to the fly ash to the silica gel powder to the fine sand is 22: 18: 14: 46.
example 5
A concrete slurry is prepared by the following steps:
a. adding 100kg of cement, 105kg of water, 10kg of iron powder, 5kg of asbestos fiber, 8kg of silicon micropowder and 5kg of sodium stannate into a stirring kettle, stirring at the rotating speed of 70r/min for 15min to form a concrete premix;
b. adding 280kg of fine aggregate, 9kg of sodium isethionate and 22kg of kojic acid palmitate into a stirring kettle, stirring at the rotating speed of 100r/min for 10min to form a concrete mixture;
c. 375kg of coarse aggregate is added into a stirring kettle, the rotating speed is 60r/min, the stirring is carried out for 10min, concrete slurry is formed, the rotating speed is 30r/min, and the stirring is continuously carried out for 5 min.
The length of the asbestos fibres in this example is 10 mm.
The fine aggregate of the embodiment comprises talcum powder, fly ash, silica gel powder and fine sand, wherein the mass ratio of the talcum powder to the fly ash to the silica gel powder to the fine sand is 22: 18: 14: 46.
example 6
A concrete slurry is prepared by the following steps:
a. adding 100kg of cement, 105kg of water, 15kg of iron powder, 8.5kg of asbestos fiber, 11.5kg of silicon micropowder and 7.5kg of sodium stannate into a stirring kettle, stirring at the rotating speed of 70r/min for 15min to form a concrete premix;
b. adding 280kg of fine aggregate, 9kg of sodium isethionate and 22kg of kojic acid palmitate into a stirring kettle, stirring at the rotating speed of 100r/min for 10min to form a concrete mixture;
c. 375kg of coarse aggregate is added into a stirring kettle, the rotating speed is 60r/min, the stirring is carried out for 10min, concrete slurry is formed, the rotating speed is 30r/min, and the stirring is continuously carried out for 5 min.
The length of the asbestos fibres in this example is 14 mm.
The fine aggregate of the embodiment comprises talcum powder, fly ash, silica gel powder and fine sand, wherein the mass ratio of the talcum powder to the fly ash to the silica gel powder to the fine sand is 22: 18: 14: 46.
example 7
A concrete slurry is prepared by the following steps:
a. adding 100kg of cement, 105kg of water, 20kg of iron powder, 12kg of asbestos fiber, 15kg of silicon micropowder and 10kg of sodium stannate into a stirring kettle, stirring at the rotating speed of 70r/min for 15min to form a concrete premix;
b. adding 280kg of fine aggregate, 9kg of sodium isethionate and 22kg of kojic acid palmitate into a stirring kettle, stirring at the rotating speed of 100r/min for 10min to form a concrete mixture;
c. 375kg of coarse aggregate is added into a stirring kettle, the rotating speed is 60r/min, the stirring is carried out for 10min, concrete slurry is formed, the rotating speed is 30r/min, and the stirring is continuously carried out for 5 min.
The length of the asbestos fibres in this example is 18 mm.
The fine aggregate of the embodiment comprises talcum powder, fly ash, silica gel powder and fine sand, wherein the mass ratio of the talcum powder to the fly ash to the silica gel powder to the fine sand is 22: 18: 14: 46.
example 8
A concrete slurry is prepared by the following steps:
a. adding 100kg of cement, 105kg of water, 18kg of iron powder, 6kg of asbestos fiber, 9kg of silicon micropowder and 8kg of sodium stannate into a stirring kettle, stirring at the rotating speed of 70r/min for 15min to form a concrete premix;
b. adding 280kg of fine aggregate, 9kg of sodium isethionate and 22kg of kojic acid palmitate into a stirring kettle, stirring at the rotating speed of 100r/min for 10min to form a concrete mixture;
c. 375kg of coarse aggregate is added into a stirring kettle, the rotating speed is 60r/min, the stirring is carried out for 10min, concrete slurry is formed, the rotating speed is 30r/min, and the stirring is continuously carried out for 5 min.
The length of the asbestos fibres in this example is 16 mm.
The fine aggregate of the embodiment comprises talcum powder, fly ash, silica gel powder and fine sand, wherein the mass ratio of the talcum powder to the fly ash to the silica gel powder to the fine sand is 22: 18: 14: 46.
example 9
A production process of a concrete prefabricated wall panel refers to fig. 1, and comprises the following specific steps:
s1, arranging a mold frame, and specifically operating as follows:
and removing the garbage, wood chip soil, scale and iron sheet and other impurities in the die frame.
S2, prefabricating a reinforcement cage in the mold frame, and specifically operating as follows:
and paving a reinforcement cage on the inner surface of the mold frame to form a primary prefabricated wallboard, and coating demolding oil in the mold frame while paving the reinforcement cage.
S3, pouring concrete slurry, and specifically operating as follows:
pouring concrete slurry along the edge of the primary prefabricated wall board, gradually pouring the concrete slurry towards the center of the primary prefabricated wall board to fill the mold frame, troweling the top surface of the concrete after the concrete is poured, and drying the primary prefabricated wall board to form the intermediate prefabricated wall board.
The temperature for laying the concrete slurry in the embodiment is 25 ℃, and in other embodiments, the temperature for laying the concrete slurry can be other temperatures such as 20 ℃, 30 ℃ and the like.
S4, forming treatment, which comprises the following specific operations:
and (4) vibrating the dense middle-level prefabricated wallboard through a vibrating table to perform molding treatment.
S5, demolding and maintaining, which specifically comprises the following steps:
and (4) separating the formed middle-stage prefabricated wall board from the mold frame, and maintaining to form the concrete wall board.
In this example, the concrete slurry of example 8 was used as the concrete slurry, and in other examples, the concrete slurries of examples 1 to 7 were also used.
Comparative example 1
The difference from example 9 is that:
in step a, the addition of iron powder is eliminated.
Comparative example 2
The difference from example 9 is that:
in step a, asbestos fibers are not added.
Comparative example 3
The difference from example 9 is that:
in the step a, adding the silicon micropowder is eliminated.
Comparative example 4
The difference from example 9 is that:
in step a, adding sodium stannate is eliminated.
Comparative example 5
The difference from example 9 is that:
in step b, the addition of kojic acid palmitate is eliminated.
Comparative example 6
The difference from example 9 is that
In step c, the addition of sodium isethionate is eliminated.
Experiment 1
The frost resistance ratings of examples 1 to 8 and comparative examples 1 to 6 were examined according to the frost resistance test in GB/T50082-2009 Standard test method for Long-term Performance and durability of ordinary concrete, and the relative dynamic elastic moduli { relative dynamic elastic moduli are recorded in terms of the relative dynamic elastic moduli in terms of the number of freeze-thaw cycles to which the samples prepared from the concrete slurries of examples 1 to 8 and comparative examples 1 to 6 were subjected
Calculation of PiThe relative dynamic elastic modulus (%) of the i-th concrete specimen after N freeze-thaw cycles f0iTransverse fundamental frequencies (Hz), f of the ith concrete specimen after N freeze-thaw cyclesniThe initial value of the transverse fundamental frequency (Hz) of the ith concrete test piece before the freeze-thaw cycle test. (the greater the relative dynamic modulus of elasticity, the higher the frost resistance rating)
Experiment 2
The samples of examples 1 to 9 and comparative examples 1 to 6 were tested for compressive strength according to astm d1074-2009 "standard test method for compressive strength of asphalt mixture".
The specific experimental data are shown in Table 1
TABLE 1
As can be seen from table 1, comparing the data of comparative example 1 and example 8, it can be seen that the addition of iron powder to the concrete slurry can effectively improve the structural strength of the concrete slurry, so that the compressive strength of the sample prepared from the concrete slurry is improved.
Compared with the data of the embodiment 8, the comparison of the comparative examples 2 and 3 shows that the asbestos fiber and the silica powder effectively improve the compressive strength of the sample prepared by the concrete slurry, so that the concrete slurry is relatively stable, and the structural strength of the concrete wallboard is relatively good.
Comparing the data of comparative example 4 and example 8, it can be seen that the addition of sodium stannate to the concrete slurry better reduces the brittle point of the concrete slurry, makes the concrete slurry less prone to frost cracking, and makes the concrete wallboard less prone to cracking.
Comparing the data of comparative example 5 and example 8, it can be seen that the kojic acid palmitate lowers the brittle point of the concrete slurry, and thus the frost resistance of the concrete slurry is better, and the frost cracking of the concrete wallboard due to the low external temperature is reduced.
Comparing the data of comparative example 6 with that of example 8, the sodium isethionate promoted kojic acid palmitate reduced the brittleness point of the concrete slurry more effectively, making the brittleness point of the concrete slurry further reduced and making the concrete wallboard less prone to cracking.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. A production process of a concrete prefabricated wallboard is characterized by comprising the following steps: the method comprises the following steps:
s1, arranging a mold frame;
s2, prefabricating a reinforcement cage in the mold frame, and specifically operating as follows:
laying a reinforcement cage in the mold frame to form a primary prefabricated wall panel;
s3, pouring concrete slurry, and specifically operating as follows:
pouring concrete slurry along the edge of the primary prefabricated wall board gradually towards the center of the primary prefabricated wall board to form a middle-grade prefabricated wall board;
s4, forming treatment, which comprises the following specific operations:
performing molding treatment by vibrating the middle-grade prefabricated wallboard;
s5, demolding and maintaining, which specifically comprises the following steps:
separating the formed middle-grade prefabricated wallboard from the mold frame, and maintaining to form a concrete wallboard;
the concrete slurry comprises the following components in parts by weight:
100 parts of cement;
400 portions of coarse aggregate;
200 portions and 300 portions of fine aggregate;
100 portions of water and 120 portions of water;
15-25 parts of kojic acid palmitate;
8-10 parts of hydroxyethyl sodium sulfonate.
2. A process for the production of a precast concrete panel according to claim 1, wherein: in step S2, during the process of laying the reinforcement cage in the mold frame, a mold release agent is coated in the mold frame.
3. A process for the production of a precast concrete panel according to claim 1, wherein: the concrete slurry also comprises the following components in parts by weight:
8-15 parts of silicon micropowder.
4. A process for the production of a precast concrete panel according to claim 1, wherein: the concrete slurry also comprises the following components in parts by weight:
5-10 parts of sodium stannate.
5. A process for the production of a precast concrete panel according to claim 1, wherein: the fine aggregate comprises talcum powder, fly ash, silica gel powder and fine sand, and the mass ratio of the talcum powder to the fly ash to the silica gel powder to the fine sand is 22: 18: 14: 46.
6. a process for the production of a precast concrete panel according to claim 1, wherein: the concrete slurry also comprises the following components in parts by weight:
10-20 parts of iron powder.
7. A process for the production of a precast concrete panel according to claim 1, wherein: the concrete slurry also comprises the following components in parts by weight:
5-12 parts of asbestos fiber;
the length of the asbestos fiber is 10-18 mm.
8. A process for the production of a precast concrete panel according to claim 1, wherein: the preparation method of the concrete slurry comprises the following steps:
a. mixing cement and water uniformly to form a concrete premix;
b. adding fine aggregate, sodium isethionate and kojic acid palmitate into the concrete premix, and uniformly stirring to form a concrete mixture;
c. adding coarse aggregate into the concrete mixture, and uniformly stirring to form concrete slurry.
9. The utility model provides a precast concrete wallboard which characterized by: prepared by the production process of the concrete prefabricated wall panel of any one of claims 1 to 8.
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| CN111499302B (en) * | 2020-04-25 | 2021-10-08 | 浙江欣成建设有限公司 | Preparation process of concrete prefabricated wallboard |
| CN112088749A (en) * | 2020-08-03 | 2020-12-18 | 瑞派尔(宜昌)科技集团股份有限公司 | Ecological concrete for restoring ecological planting |
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