CN112679159A - Prefabricated light high-strength clear water ceramsite concrete and preparation process of external wall panel thereof - Google Patents
Prefabricated light high-strength clear water ceramsite concrete and preparation process of external wall panel thereof Download PDFInfo
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- CN112679159A CN112679159A CN202011536605.4A CN202011536605A CN112679159A CN 112679159 A CN112679159 A CN 112679159A CN 202011536605 A CN202011536605 A CN 202011536605A CN 112679159 A CN112679159 A CN 112679159A
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Abstract
The invention provides a prefabricated light high-strength clear water ceramsite concrete and a preparation process of an external wall panel thereof, wherein the concrete comprises the following raw material components in parts by weight: cement: 300-350 parts; crushed stone-like shale ceramsite: 350-450 parts; 180 portions of granular clay ceramsite; medium coarse sand: 680 and 800 parts; fly ash: 45-55 parts of a modifier; silica fume: 10-20 parts; water: accounting for 25 to 35 percent of the total mass of the cement, the fly ash and the silica fume; additive I component: accounting for 1.5 to 2.5 percent of the total mass of the cement, the fly ash and the silica fume; the component I of the additive comprises isopentene-based polyether grafted carboxymethyl cellulose ether and at least one thickener of composite acrylic and polyurethane associative thickeners; additive agentAnd II, component (A): accounting for 0.1 to 0.5 percent of the total mass of the cement, the fly ash and the silica fume; the additive II component comprises starch-acrylamide graft copolymer. The product prepared by the invention has the strength of more than 30MPa and the lowest density of 1600g/cm3Has the characteristics of low density and high strength.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of building materials, in particular to prefabricated light high-strength clear water ceramsite concrete and a preparation process of an external wall panel thereof.
[ background of the invention ]
With the deep development of the construction industry and the change of the population structure of China, the aim of green buildings is to move a novel building industrialization road to become the direction of transformation development of the construction industry. Meanwhile, in recent years, with the continuous development and maturity of the production capacity and the construction technology of large-scale equipment, the country provides a development target of building industrialization, and the use of prefabricated parts is one of important ways for realizing the building industrialization. By adopting a large number of prefabricated parts to replace the traditional building products, the working efficiency of workers can be effectively improved, the working period is shortened, and a series of problems caused by the traditional field wet operation mode are reduced. The prefabricated exterior wall cladding is used as one of prefabricated components and is also one of effective ways for realizing building industrialization. Among the hanging plates made of various materials, the concrete has the advantages from aesthetic appearance, manufacturing cost, durability and the like, but has the defects of great weight, difficult hoisting and the like, and the prefabricated clear water decoration-free light high-strength ceramsite concrete external wall plate is used as a special external hanging plate, so that the integration of building energy conservation and an enclosure structure is realized, the self weight of the structure is reduced, the durability of the enclosure external wall of the residential building is improved, and the natural decoration-free effect of the concrete can be exerted. In conclusion, the prefabricated clear water decoration-free light high-strength ceramsite concrete external wall panel has a good application prospect and obvious economic benefits.
The prefabricated wall boards are widely used in the field of building industrialization, such as plant fiber reinforced boards, aerated cement boards, slag coal ash boards, fly ash stone cement boards, gypsum boards and the like, most of the prefabricated wall boards have low strength and are not suitable for exterior wall enclosure, and the existing ceramsite concrete wall boards, such as Chinese patent with the patent number of CN201710663788.8, disclose a surface-cut-and-ground type ceramsite concrete prefabricated wall board, adopt methods of built-in reinforcing mesh sheets, surface-cut-and-ground and the like, have complex process, and have strength which does not meet the requirement that the strength is not lower than 25MPa in the prior industrial standard 'application technical standard of prefabricated concrete externally-hung wall boards' 2018. Chinese patent No. CN202010162553.2 discloses a decorative heat-insulating integrated ceramsite concrete prefabricated plate, which is more complicated, and needs to be additionally provided with heat-insulating layers such as an EPS polystyrene plate, an XPS extruded sheet, a PUR polyurethane plate, a silica plate or a rock wool plate, and the compressive strength value is not mentioned; chinese patent No. CN201610521854.3 discloses a ceramsite concrete self-insulation external wall panel and a manufacturing method thereof, which have similar situations; chinese patent No. CN201910658025.3 discloses a method for casting a ceramsite concrete cast-in-place non-bearing wall, which has low strength and is only suitable for inner partition walls.
Based on the defects of the existing prefabricated light wallboard, the invention mainly uses different similar ceramsite as raw materials to prepare the prefabricated exterior wallboard with the light high-strength clear water decoration-free effect (the strength is more than 30MPa, and the density is as low as 1600 g/cm)3)。
[ summary of the invention ]
The invention aims to solve the technical problem of providing a prefabricated light high-strength clear water ceramsite concrete, a preparation process of an external wall panel thereof and a prepared productThe strength is more than 30MPa, and the density is as low as 1600g/cm3Has the characteristics of low density and high strength.
The invention is realized by the following steps:
the prefabricated light high-strength clear water ceramsite concrete comprises the following raw material components in parts by weight:
cement: 300-350 parts; crushed stone-like shale ceramsite: 350-450 parts; 180 portions of granular clay ceramsite; medium coarse sand: 680 and 800 parts; fly ash: 45-55 parts of a modifier; silica fume: 10-20 parts;
water: accounting for 25 to 35 percent of the total mass of the cement, the fly ash and the silica fume;
additive I component: accounting for 1.5 to 2.5 percent of the total mass of the cement, the fly ash and the silica fume; the additive I component comprises isopentene polyether grafted carboxymethyl cellulose ether, composite acrylic acids and a polyurethane associated thickener; wherein the prenyl polyether grafted carboxymethyl cellulose ether accounts for 65-75% of the total mass of the additive I component, 25-35% of the polyurethane associated thickener and 0-10% of the composite acrylic acid;
and (3) an additive II component: accounting for 0.1 to 0.5 percent of the total mass of the cement, the fly ash and the silica fume; the additive II component comprises starch-acrylamide graft copolymer.
Furthermore, the particle size of the crushed stone-like shale ceramsite is 10-20mm, the bulk density is 800-1000kg/m3, and the cylinder pressure strength is not lower than 6 MPa.
Furthermore, the particle size of the granular clay ceramsite is 5-10mm, the bulk density is 400-600kg/m3, and the cylinder pressure strength is not lower than 3 MPa.
Further, P.O 42.5.5 cement is adopted as the cement.
Further, the content of SiO2 in the silica fume is more than or equal to 85 percent, and the specific surface area is more than or equal to 15m2The activity index is more than or equal to 105 percent.
Furthermore, the water demand ratio of the fly ash is less than or equal to 95 percent, and the strength activity index is more than or equal to 70.0 percent.
Furthermore, the fineness modulus of the medium grit is 2.6-3.2.
Further, the concrete is used for preparing prefabricated external wall panels.
Further, the preparation process of the prefabricated light high-strength clear water ceramsite concrete external wall panel comprises the following steps:
(1) proportioning and stirring processes: pouring the granular clay ceramsite into a stirring container, adding cement, fly ash and silica fume, adding the additive II component into 25% of water, uniformly stirring, pouring into the stirring container, stirring for 1-1.5min, then adding half of the medium coarse sand and crushed stone-like shale ceramsite and 50% of the water and the additive I component, stirring for 2min, adding the rest of the medium coarse sand and water, and stirring for 2-3 min;
(2) the molding process comprises the following steps: the method is characterized in that a steel die and a special water-based release agent for fair-faced concrete are used, a vibrating rod with the vibration frequency not more than 3000 times/minute is used for vibrating during pouring and tamping, the inserting vibration time is preferably 10-15 seconds/time, simultaneously, one-time press finishing and surface finishing are carried out within half an hour after pouring and tamping, and at least one-time press finishing and surface finishing are carried out before initial setting.
The invention has the following advantages:
the invention utilizes the crushed stone shale ceramic particles and the granular clay ceramic particles as the coarse aggregate, and the prepared product has the strength of more than 30MPa and the lowest density of 1600g/cm through proportioning optimization and additive complex doping3Has the characteristics of low density and high strength.
[ detailed description ] embodiments
The invention relates to a prefabricated light high-strength clear water ceramsite concrete external wall panel, which comprises the following raw material components in parts by weight: cement: 300-350 parts; crushed stone-like shale ceramsite: 350-450 parts; 180 portions of granular clay ceramsite; medium coarse sand with fineness modulus of 2.6-3.2: 680 and 800 parts; fly ash: 45-55 parts of a modifier; silica fume: 10-20 parts;
water: accounting for 25 to 35 percent of the total mass of the cement, the fly ash and the silica fume;
additive I component: accounting for 1.5 to 2.5 percent of the total mass of the cement, the fly ash and the silica fume; the additive I component comprises isopentene polyether grafted carboxymethyl cellulose ether, composite acrylic acids and a polyurethane associated thickener; wherein the prenyl polyether grafted carboxymethyl cellulose ether accounts for 65-75% of the total mass of the additive I component, 25-35% of the polyurethane associated thickener and 0-10% of the composite acrylic acid;
and (3) an additive II component: accounting for 0.1 to 0.5 percent of the total mass of the cement, the fly ash and the silica fume; the additive II component comprises starch-acrylamide graft copolymer.
The particle size of the crushed stone-like shale ceramsite is 10-20mm, the bulk density is 800-1000kg/m3, and the cylinder pressure strength is not lower than 6 MPa.
The grain size of the granular clay ceramsite is 5-10mm, the bulk density is 400-600kg/m3, and the cylinder pressure strength is not lower than 3 MPa.
The cement adopts P.O 42.5.5 cement, and meets the requirements of the current national standard GB 175 Universal Portland Cement.
SiO in the silica fume2The content is more than or equal to 85 percent, and the specific surface area is more than or equal to 15m2The activity index is more than or equal to 105 percent, and the product meets the requirements of the current national standard GB/T27690 silica fume for mortar and concrete.
The water demand ratio of the fly ash is less than or equal to 95 percent, the strength activity index is more than or equal to 70.0 percent, and the fly ash meets the requirements of the existing national standard of fly ash used in cement, mortar and concrete GB/T1596.
The concrete is used for preparing prefabricated external wall panels.
The invention also relates to a preparation process of the prefabricated light high-strength clear water ceramsite concrete external wall panel,
the concrete raw material components of the concrete external wall panel are as described above; the process comprises the following steps:
(1) proportioning and stirring processes: pouring the granular clay ceramsite into a stirring container, adding cement, fly ash and silica fume, adding the additive II component into 25% of water, uniformly stirring, pouring into the stirring container, stirring for 1-1.5min, then adding half of the medium coarse sand and crushed stone-like shale ceramsite and 50% of the water and the additive I component, stirring for 2min, adding the rest of the medium coarse sand and water, and stirring for 2-3 min;
(2) the molding process comprises the following steps: the method is characterized in that a steel die and a special water-based release agent for fair-faced concrete are used, a vibrating rod with the vibration frequency not more than 3000 times/minute is used for vibrating during pouring and tamping, the inserting vibration time is preferably 10-15 seconds/time, simultaneously, one-time press finishing and surface finishing are carried out within half an hour after pouring and tamping, and at least one-time press finishing and surface finishing are carried out before initial setting.
The technical solution of the present invention will be clearly and completely described with reference to the following detailed description. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1:
P.O 42.5.5 cement: 310 kg;
crushed stone-like shale ceramisite (weight in saturated dry state): 420 kg;
granular clay ceramsite (weight in saturated dry state): 125 kg;
medium grit (fineness modulus 2.6-3.2): 700 kg; fly ash: 45 kg; silica fume: 15 kg; water: 120kg of
And the additive I component (65% of isopentene-based polyether grafted carboxymethyl cellulose ether, 25% of polyurethane associated thickener and 10% of composite acrylic acid): 5.5 kg; and (3) an additive II component: 0.75 kg;
after stirring and forming, the dry bulk density is 1640kg/m3The 28d compressive strength was 36.7 MPa.
Example 2:
P.O 42.5.5 cement: 340 kg;
crushed stone-like shale ceramisite (weight in saturated dry state): 400 kg;
granular clay ceramsite (weight in saturated dry state): 150 kg;
medium grit (fineness modulus 2.6-3.2): 750 kg; fly ash: 50 kg; silica fume: 18 kg; water: 110 kg;
and the component I of the additive (70 percent of isopentene polyether grafted carboxymethyl cellulose ether, 25 percent of polyurethane associated thickener and 5 percent of composite acrylic acid): 9.0 kg; and (3) an additive II component: 1.2 kg;
after stirring and forming, the dry bulk density is 1760kg/m3, and the 28d compressive strength is 43.8 MPa.
Example 3:
P.O 42.5.5 cement: 350 kg;
crushed stone-like shale ceramisite (weight in saturated dry state): 380 kg;
granular clay ceramsite (weight in saturated dry state): 170 kg;
medium grit (fineness modulus 2.6-3.2): 700 kg; fly ash: 50 kg; silica fume: 18 kg; water: 110 kg;
additive I component (isopentene polyether grafted carboxymethyl cellulose ether 70%, polyurethane associated thickener 30%): 9.0 kg; and (3) an additive II component: 1.2 kg;
after stirring and forming, the dry bulk density is 1710kg/m3, and the 28d compressive strength is 41.2 MPa.
The invention utilizes the crushed stone shale ceramic particles and the granular clay ceramic particles as the coarse aggregate, and the prepared product has the strength of more than 30MPa and the lowest density of 1600g/cm through proportioning optimization and additive complex doping3The prefabricated exterior wall cladding with the light high-strength decoration-free effect.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (9)
1. The utility model provides a prefabricated light high-strength clear water ceramsite concrete which characterized in that: the concrete comprises the following raw material components in parts by weight:
cement: 300-350 parts; crushed stone-like shale ceramsite: 350-450 parts; 180 portions of granular clay ceramsite; medium coarse sand: 680 and 800 parts; fly ash: 45-55 parts of a modifier; silica fume: 10-20 parts;
water: accounting for 25 to 35 percent of the total mass of the cement, the fly ash and the silica fume;
additive I component: accounting for 1.5 to 2.5 percent of the total mass of the cement, the fly ash and the silica fume; the additive I component comprises isopentene polyether grafted carboxymethyl cellulose ether, composite acrylic acids and a polyurethane associated thickener; wherein the prenyl polyether grafted carboxymethyl cellulose ether accounts for 65-75% of the total mass of the additive I component, 25-35% of the polyurethane associated thickener and 0-10% of the composite acrylic acid;
and (3) an additive II component: accounting for 0.1 to 0.5 percent of the total mass of the cement, the fly ash and the silica fume; the additive II component comprises starch-acrylamide graft copolymer.
2. The prefabricated light high-strength clear water ceramsite concrete according to claim 1, is characterized in that: the particle size of the crushed stone-like shale ceramsite is 10-20mm, the bulk density is 800-1000kg/m3, and the cylinder pressure strength is not lower than 6 MPa.
3. The prefabricated light high-strength clear water ceramsite concrete according to claim 1, is characterized in that: the grain size of the granular clay ceramsite is 5-10mm, the bulk density is 400-600kg/m3, and the cylinder pressure strength is not lower than 3 MPa.
4. The prefabricated light high-strength clear water ceramsite concrete according to claim 1, is characterized in that: the cement is P.O 42.5.5 cement.
5. The prefabricated light high-strength clear water ceramsite concrete according to claim 1, is characterized in that: the content of SiO2 in the silica fume is more than or equal to 85 percent, and the specific surface area is more than or equal to 15m2The activity index is more than or equal to 105 percent.
6. The prefabricated light high-strength clear water ceramsite concrete according to claim 1, is characterized in that: the water demand ratio of the fly ash is less than or equal to 95 percent, and the strength activity index is more than or equal to 70.0 percent.
7. The prefabricated light high-strength clear water ceramsite concrete according to claim 1, is characterized in that: the fineness modulus of the medium grit is 2.6-3.2.
8. The prefabricated light high-strength clear water ceramsite concrete according to any one of claims 1 to 7, wherein the prefabricated light high-strength clear water ceramsite concrete comprises: the concrete is used for preparing prefabricated external wall panels.
9. A preparation technology of a prefabricated light high-strength clear water ceramsite concrete external wall panel is characterized by comprising the following steps of:
the concrete of the concrete external wall panel is based on the concrete of any one of claims 1 to 7; the process comprises the following steps:
(1) proportioning and stirring processes: pouring the granular clay ceramsite into a stirring container, adding cement, fly ash and silica fume, adding the additive II component into 25% of water, uniformly stirring, pouring into the stirring container, stirring for 1-1.5min, then adding half of the medium coarse sand and crushed stone-like shale ceramsite and 50% of the water and the additive I component, stirring for 2min, adding the rest of the medium coarse sand and water, and stirring for 2-3 min;
(2) the molding process comprises the following steps: the method is characterized in that a steel die and a special water-based release agent for fair-faced concrete are used, a vibrating rod with the vibration frequency not more than 3000 times/minute is used for vibrating during pouring and tamping, the inserting vibration time is preferably 10-15 seconds/time, simultaneously, one-time press finishing and surface finishing are carried out within half an hour after pouring and tamping, and at least one-time press finishing and surface finishing are carried out before initial setting.
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Cited By (2)
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| CN113354363A (en) * | 2021-06-25 | 2021-09-07 | 福建金华鼎科技有限公司 | Rapid-forming precast concrete and preparation method thereof |
| CN116102287A (en) * | 2023-04-11 | 2023-05-12 | 中交一公局第六工程有限公司 | Binding material for building and preparation method thereof |
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Application publication date: 20210420 |