CN102320858A - Flame retardant and heat-insulation foamed concrete and preparation method thereof - Google Patents
Flame retardant and heat-insulation foamed concrete and preparation method thereof Download PDFInfo
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- CN102320858A CN102320858A CN201110232141A CN201110232141A CN102320858A CN 102320858 A CN102320858 A CN 102320858A CN 201110232141 A CN201110232141 A CN 201110232141A CN 201110232141 A CN201110232141 A CN 201110232141A CN 102320858 A CN102320858 A CN 102320858A
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Abstract
The invention belongs to a flame retardant and heat-insulation building material, relates to flame retardant and heat-insulation foamed concrete and a preparation method thereof. In the prior art, the foamed concrete has disadvantages of low strength, large shrinkage, easy cracking due to water absorption. The flame retardant and heat-insulation foamed concrete provided by the present invention comprises the following materials, wherein the materials comprise, by mass, 30-60 parts of cement, 30-70 parts of fly ash, 10-40 parts of mineral powder, 0.05-1.0 parts of a siloxane water reducing agent, 0.02-0.2 parts of a cellulose ether, 0.05-1.0 parts of a silane water-repelling agent, 1-10 parts of anhydrite, 0.06-0.2 parts of polypropylene fibers, 0.1-0.4 parts of a foaming agent and 0.30-0.60 parts of water. The flame retardant and heat-insulation foamed concrete and the preparation method provided by the present invention have the following advantages that: the foamed concrete has characteristics of high strength, low shrinkage and good water repellency; the foamed concrete has excellent heat insulation property, such that different heat insulation requirements of the building can be met; the preparation process is simple; the industrial waste materials such as fly ash, mineral powder and the like are adopted so as to protect the environment.
Description
Technical field
The invention belongs to the fire-retardant heat insulation material of construction, specifically a kind of fire-retardant heat insulation foamed concrete and preparation method thereof.
Background technology
Chinese architecture energy-saving heat preserving engineering uses thermal insulation material in a large number at present, because a lot of material flame retardant effect is not good, fire very easily occurs, so the energy-conservation market of Chinese architecture presses for the fire-retardant heat insulation material.The inorganic cellular insulant combustionproperty reaches does not fire the A level.In froth inorganic stock, the price of multicellular glass, foamed aluminium, foamed ceramics is high, can not become the main source of fire-retardant heat insulation material of construction.Though fiber heat preservation material prices such as rock wool mineral wool are lower slightly, but still far above foamed concrete and gas concrete material.Consider that from aspects such as heat retaining property, security, uninflammability foamed concrete and gas concrete are still the best substitute of organic heat-insulating material of construction.Prior art foamed concrete is with mechanical means the foaming agent aqueous solution to be prepared into foam; Again foam is joined in the slip of compositions such as containing siliceous material, calcareous material, water and various admixtures a kind of porous material that warp mixing stirring, casting, maintenance form.Gas concrete and foamed concrete are similar at aspects such as air hole structure and heat retaining properties, compare with gas concrete, and there is following advantage in foamed concrete: need not steam pressure, less energy consumption in the production process 1.; 2. form of construction work is flexible, but not only cast in situs, but also can be made into various prefabrications, is widely used in engineering fields such as roofing, body of wall and ground floor heating insulation; 3. foamed concrete adopts cast-in-place mode to be used for the roofing ground construction, and it is fast to have a speed of application; High, the good integrity of foamed concrete and basic unit's bonding force; Realize levelling, look for the slope, be incubated the operation trinity, practice thrift the engineering time, improve construction work efficient.Foamed concrete can be guaranteed fire safety and work-ing life when realizing building energy conservation.The shortcoming of prior art foamed concrete is: intensity is low, contraction is big, be prone to the suction cracking; These drawbacks limit applying of foamed concrete material.Therefore invent that a kind of raw material is cheap, working method is simple, intensity is high, contractions is little, hydrophobic type, fire-retardant heat insulation foamed concrete that the fire-retardant heat insulation performance is good and preparation method thereof are necessity very.
Summary of the invention
The object of the present invention is to provide that a kind of raw material is cheap, working method is simple, intensity is high, contraction is little, hydrophobic type, fire-retardant heat insulation foamed concrete that the fire-retardant heat insulation performance is good;
Another object of the present invention is to provide the preparation method of this fire-retardant heat insulation foamed concrete.
The technical scheme that realizes the object of the invention is following:
A kind of fire-retardant heat insulation foamed concrete, form by the material of following mass ratio:
Cement 30-60 part; Flyash 30-70 part;
Breeze 10-40 part; Water reducer 0.05-1.0 part;
Ether of cellulose 0.02-0.2 part; Silane hydrophober 0.05-1.0 part;
No water anhydrite 1-10 part; Polypropylene fibre 0.06-0.2 part;
Whipping agent 0.1-0.4 part; Water 0.30-0.60 part.
(1) said cement is a kind of in 42.5 grades ordinary Portland cement or the quick hardening sulphoaluminate cement;
(2) said flyash is that one or more the mixture in the low calcium fly ash of row I level, the low calcium fly ash of II level, I level high-calcium fly ass, the II level high-calcium fly ass is done by the coal-burning power plant;
(3) said breeze is one or more the mixture among S95 (28d activity index >=95%), S105 (28d activity index >=105%), the S115 (28d activity index >=115%);
(4) said water reducer is a kind of of ultrapas high efficiency water reducing agent or naphthalene series high-efficiency water-reducing agent;
(5) said ether of cellulose is a kind of in hydroxyethylmethyl-cellulose ether or the hydroxypropyl methyl cellulose ether, range of viscosities: 10,000-30,000;
(6) said polypropylene fibre, length range are 3mm-10mm.
(7) said whipping agent is the high-performance composite foamable agent.
The preparation method of fire-retardant heat insulation foamed concrete is following:
(1) cement, flyash, breeze, water reducer, ether of cellulose, hydrophober, gypsum, polypropylene fibre are mixed makes dry mash;
(2), foaming agent water solution is processed foam with air compression foaming machine with the whipping agent dilute with water;
(3) dry mash that step (1) is made adds water and stirs;
(4) foam with step (2) preparation adds mixing and stirring in the cement slurry, makes fire-retardant heat insulation foamed concrete.
Main points of the present invention are:
Form foamed concrete by material mixing such as cement, flyash, breeze, water reducer, ether of cellulose, silane hydrophober, no water anhydrite, polypropylene fibre and whipping agents.
The flyash that the present invention uses is done one or more mixture of the low calcium fly ash of row I level, the low calcium fly ash of II level, I level high-calcium fly ass, II level high-calcium fly ass etc. as the coal-burning power plant.
Breeze is one or more the mixture among S95 (28d activity index >=95%), S105 (28d activity index >=105%), the S115 (28d activity index >=115%).
Ether of cellulose is hydroxyethylmethyl-cellulose ether or hydroxypropyl methyl cellulose ether, range of viscosities: 10,000-30,000.
Water reducer is ultrapas high efficiency water reducing agent or naphthalene series high-efficiency water-reducing agent.
Polypropylene fibre, length range are 3mm-10mm.
Whipping agent is the high-performance compound whipping agent.
Raw material is cheap, working method is simple, intensity is high, contraction is little, the preparation method of hydrophobic type, fire-retardant heat insulation foamed concrete that the fire-retardant heat insulation performance is good is following:
(1) cement, flyash, breeze, water reducer, ether of cellulose, hydrophober, gypsum, anti-crack fiber are mixed makes dry mash.
(2), foaming agent water solution is processed foam with air compression foaming machine with the whipping agent dilute with water;
(3) dry mash that step (1) is made adds water and stirs;
(4) foam with step (2) preparation adds mixing and stirring in the cement slurry, makes fire-retardant heat insulation foamed concrete.
The present invention combines flyash, breeze and gypsum; Make full use of the microdilatancy characteristic of gypsum aquation and to the vitriol activity excitation effect of flyash and breeze; Under the modifying function of components such as high efficiency water reducing agent, ether of cellulose, hydrophober, polypropylene fibre, prepare that a kind of raw material is cheap, working method is simple, intensity is high, contraction is little, hydrophobic type, fire-retardant heat insulation foamed concrete that the fire-retardant heat insulation performance is good.Compare with prior art foamed concrete, the present invention shows following characteristics:
1. in cement, flyash, breeze, the no water anhydrite quaternary aquation system, the alkali excitation of no water anhydrite and hydrated cementitious has been quickened the secondary hydration reaction of flyash, breeze, has effectively remedied flyash early hydration intensity problem of lower.
2. the application of high efficiency water reducing agent can improve the following performance of foamed concrete:
1. reduce ratio of water to material, improve the intensity of foamed concrete, remedy the deficiency of its intensity difference;
2. the slurry water consumption reduces, and foamed concrete is little owing to volume that water evaporates is lost in drying process, reduces volumetric shrinkage.
3. improve the cohesion of foamed concrete slurry, it is stable to help foamy, makes foam aperture more even; Reduce the probability that the foam come-up merges, reduce the bleeding passage, help reducing water-intake rate.The application of high efficiency water reducing agent can improve ultimate compression strength, the reduction of foamed concrete and shrink, reduces water-intake rate.
3. adopt ether of cellulose can reduce aperture size, improve the homogeneity in foamed concrete aperture, improve the thermal and insulating performance and the ultimate compression strength of foamed concrete.Ether of cellulose can increase the viscosity of slurry, and it is stable to help foamy, reduces the probability that the vesicle come-up is merged into bulla.Test shows, compares with benchmark foamed concrete, and behind the plain ether of adding of fiber, the foamed concrete aperture size diminishes, and the aperture is more even.The size in aperture is more little, and its thermal and insulating performance is good more, and the network skeleton that the abscess partition forms is firmer.The aperture is even more, and the intensity of foamed concrete is just high more.Thereby the plain ether of adding of fiber helps the raising of foamed concrete intensity and the improvement of thermal and insulating performance.
4. gypsum has certain microdilatancy effect in hydration process, inherent volumetric shrinkage distortion in the compensation water cement-based material hydration process to a certain extent.Simultaneously, flyash self higher fineness and strong micro-aggregate buttressing effect itself have been strengthened the foamed concrete microstructure, have stoped the volumetric shrinkage distortion.On the other hand, the adding of high efficiency water reducing agent has reduced water consumption, has also reduced moulding shrinkage strain.In addition, the cracking resistance component-polypropylene fibre that mixes can effectively stop the crack growth on foamed concrete surface, improve resistance to cleavage, thereby foamed concrete shows good volume stability on one-piece construction.
5. can form firm valence bond with the oh group in the hydrated cementitious product after hydrophober adds and close, be combined in the surface of abscess partition cement matrix hole wall securely.Because hydrophobic organo-functional group towards the outside of hole wall, makes the surface of abscess partition cement matrix hole obtain certain hydrophobic nature, for foamed concrete has brought integral hydrophobic effect preferably.
6. the utilization of industrial waste such as flyash and breeze helps environmental protection and energy saving.
Advantage of the present invention is following:
1. foamed concrete intensity of the present invention is high, contraction is low, hydrophobic nature good.
2. thermal and insulating performance is excellent, can satisfy the different insulation requirement of buildings.
3. preparation technology is simple.
4. make full use of industrial wastes such as flyash, breeze, had the environmental protection effect and the favorable economic benefit of sharp excellence such as useless, energy-conservation.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment.
Embodiment 1:
Fire-retardant heat insulation foamed concrete 1 is prepared according to following mass ratio: 40 parts of cement, 42 parts in flyash, 18 parts of breezes, 0.2 part of water reducer, 0.03 part of ether of cellulose, 0.2 part of hydrophober, 4.8 parts in gypsum, 0.08 part of polypropylene fibre, 0.20 part of whipping agent, 0.33 part in water.
The preparation method is following:
(1) cement, flyash, breeze, water reducer, ether of cellulose, hydrophober, gypsum, anti-crack fiber are mixed makes dry mash.
(2), foaming agent water solution is processed foam with air compression foaming machine with the whipping agent dilute with water;
(3) dry mash that step (1) is made adds water and stirs;
(4) foam with step (2) preparation adds mixing and stirring in the cement slurry, makes fire-retardant heat insulation foamed concrete.
Embodiment 2:
Fire-retardant heat insulation foamed concrete 2 is prepared according to following mass ratio: 50 parts of cement; 25 parts in flyash; 25 parts of breezes; 0.4 part of water reducer; 0.03 part of ether of cellulose; 0.4 part of hydrophober; 2 parts in gypsum; 0.16 part of polypropylene fibre; 0.21 part of whipping agent; 0.31 part in water.
The preparation method is with embodiment 1.
Embodiment 3:
Fire-retardant heat insulation foamed concrete 3 is prepared according to following mass ratio: 60 parts of cement; 12 parts in flyash; 28 parts of breezes; 0.3 part of water reducer; 0.05 part of ether of cellulose; 0.2 part of hydrophober; 1.2 parts in gypsum; 0.24 part of polypropylene fibre; 0.20 part of whipping agent; 0.32 part in water.
The preparation method is with embodiment 1.
Embodiment 4 (Comparative Examples):
Conventional foam concrete 4 is prepared according to following mass ratio: 100 parts of cement; 0.20 part of whipping agent; 0.5 part in water.
The preparation method is with embodiment 1.
The foamed concrete performance that embodiment of the invention 1-3 and conventional foam concrete embodiment 4 make is seen table one.
Table one foamed concrete performance
Can find out by table one; Compare with prior art foamed concrete, fire-retardant heat insulation foamed concrete of the present invention have ultimate compression strength apparently higher than existing foamed concrete, water-intake rate significantly less than existing foamed concrete, drying shrinkage advantage less than existing foamed concrete.
The foregoing description is merely preference of the present invention, is not used for limiting the present invention, and is all within principle of the present invention, made any be equal to alternative, revise and change, all within protection scope of the present invention.
Claims (3)
1. fire-retardant heat insulation foamed concrete, form by the material of following mass ratio:
Cement 30-60 part; Flyash 30-70 part;
Breeze 10-40 part; Water reducer 0.05-1.0 part;
Ether of cellulose 0.02-0.2 part; Silane hydrophober 0.05-1.0 part;
No water anhydrite 1-10 part; Polypropylene fibre 0.06-0.2 part;
Whipping agent 0.1-0.4 part; Water 0.30-0.60 part.
2. fire-retardant heat insulation foamed concrete according to claim 1 is characterized in that:
(1) said cement is a kind of in 42.5 grades ordinary Portland cement or the quick hardening sulphoaluminate cement;
(2) said flyash is that one or more the mixture in the low calcium fly ash of row I level, the low calcium fly ash of II level, I level high-calcium fly ass, the II level high-calcium fly ass is done by the coal-burning power plant;
(3) said breeze is S95,28d activity index >=95%, S105,28d activity index >=105%, S115, the mixture of one or more in 28d activity index >=115%;
(4) said water reducer is a kind of of ultrapas high efficiency water reducing agent or naphthalene series high-efficiency water-reducing agent;
(5) said ether of cellulose is a kind of in hydroxyethylmethyl-cellulose ether or the hydroxypropyl methyl cellulose ether, range of viscosities: 10,000-30,000;
(6) said polypropylene fibre, length range are 3mm-10mm.
3. the preparation method of a fire-retardant heat insulation foamed concrete is following:
(1) cement, flyash, breeze, water reducer, ether of cellulose, hydrophober, gypsum, polypropylene fibre are mixed makes dry mash;
(2), foaming agent water solution is processed foam with air compression foaming machine with the whipping agent dilute with water;
(3) dry mash that step (1) is made adds water and stirs;
(4) foam with step (2) preparation adds mixing and stirring in the cement slurry, makes fire-retardant heat insulation foamed concrete behind the shaping and drying.
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| CN201110232141A CN102320858A (en) | 2011-08-15 | 2011-08-15 | Flame retardant and heat-insulation foamed concrete and preparation method thereof |
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| CN201110232141A CN102320858A (en) | 2011-08-15 | 2011-08-15 | Flame retardant and heat-insulation foamed concrete and preparation method thereof |
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| CN103304257A (en) * | 2013-05-08 | 2013-09-18 | 上海市建筑构件制品有限公司 | Foam concrete and preparation method thereof |
| CN103804014A (en) * | 2013-12-31 | 2014-05-21 | 广西超星太阳能科技有限公司 | Heat preservation flame-retardant foamed material and preparation method thereof |
| CN104072074A (en) * | 2014-05-29 | 2014-10-01 | 蚌埠华东石膏有限公司 | Flame-retardant concrete and preparation method thereof |
| CN104203867A (en) * | 2012-04-06 | 2014-12-10 | 拉法基公司 | Insulating mineral foam |
| CN104612375A (en) * | 2014-05-14 | 2015-05-13 | 北京华泰晟隆建筑节能科技有限公司 | Building floor backfill spacer process method and building floor backfill spacer structure |
| WO2015104466A1 (en) * | 2014-01-10 | 2015-07-16 | Greenmade Development Limited | Hydraulic cements based on cement or on cement clinker or on lime, on calcium sulphate, and on a pozzolanic component; process for the manufacture thereof and uses thereof |
| RU2592912C2 (en) * | 2013-07-17 | 2016-07-27 | Чайна Юниверсити Оф Майнинг Энд Текнолоджи | Inorganic cured foam material for stopping leaks on surface in area of coal production in shallow formation and preparation method thereof |
| CN106830850A (en) * | 2017-03-15 | 2017-06-13 | 北京城建九秋实混凝土有限公司 | Foamed concrete and its production technology |
| CN107857527A (en) * | 2017-11-02 | 2018-03-30 | 叠彩区千牛起重设备经营部 | A kind of anti-seismic concrete material |
| CN108623270A (en) * | 2018-05-31 | 2018-10-09 | 宁波联城住工科技有限公司 | A kind of waterproof foam concrete formula and preparation method thereof |
| CN110092621A (en) * | 2018-01-30 | 2019-08-06 | 武汉科技大学 | A kind of steel slag permeable foam concrete and preparation method thereof |
| CN112225505A (en) * | 2020-10-19 | 2021-01-15 | 广东博智林机器人有限公司 | Foam concrete, preparation method thereof and composite material |
| CN112250382A (en) * | 2020-10-19 | 2021-01-22 | 广东博智林机器人有限公司 | Foamed concrete, preparation method thereof and composite material |
| CN115259894A (en) * | 2022-08-10 | 2022-11-01 | 浙江省二建建设集团有限公司 | Super-hydrophobic self-repairing foam concrete |
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| CN102153364A (en) * | 2011-05-04 | 2011-08-17 | 上海市建筑科学研究院(集团)有限公司 | Flame retardant heat-insulation foam concrete and preparation method thereof |
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| CN104203867B (en) * | 2012-04-06 | 2017-03-08 | 拉法基公司 | Adiabatic mineral froth |
| CN104203867A (en) * | 2012-04-06 | 2014-12-10 | 拉法基公司 | Insulating mineral foam |
| CN103304257A (en) * | 2013-05-08 | 2013-09-18 | 上海市建筑构件制品有限公司 | Foam concrete and preparation method thereof |
| RU2592912C2 (en) * | 2013-07-17 | 2016-07-27 | Чайна Юниверсити Оф Майнинг Энд Текнолоджи | Inorganic cured foam material for stopping leaks on surface in area of coal production in shallow formation and preparation method thereof |
| CN103804014A (en) * | 2013-12-31 | 2014-05-21 | 广西超星太阳能科技有限公司 | Heat preservation flame-retardant foamed material and preparation method thereof |
| WO2015104466A1 (en) * | 2014-01-10 | 2015-07-16 | Greenmade Development Limited | Hydraulic cements based on cement or on cement clinker or on lime, on calcium sulphate, and on a pozzolanic component; process for the manufacture thereof and uses thereof |
| CN104612375B (en) * | 2014-05-14 | 2017-02-08 | 北京华泰晟隆建筑节能科技有限公司 | Building floor backfill spacer process method and building floor backfill spacer structure |
| CN104612375A (en) * | 2014-05-14 | 2015-05-13 | 北京华泰晟隆建筑节能科技有限公司 | Building floor backfill spacer process method and building floor backfill spacer structure |
| CN104072074B (en) * | 2014-05-29 | 2016-02-10 | 蚌埠华东石膏有限公司 | A kind of fire-retardant concrete and preparation method thereof |
| CN104072074A (en) * | 2014-05-29 | 2014-10-01 | 蚌埠华东石膏有限公司 | Flame-retardant concrete and preparation method thereof |
| CN106830850A (en) * | 2017-03-15 | 2017-06-13 | 北京城建九秋实混凝土有限公司 | Foamed concrete and its production technology |
| CN106830850B (en) * | 2017-03-15 | 2019-06-04 | 北京城建九秋实混凝土有限公司 | Foamed concrete and its production technology |
| CN107857527A (en) * | 2017-11-02 | 2018-03-30 | 叠彩区千牛起重设备经营部 | A kind of anti-seismic concrete material |
| CN110092621A (en) * | 2018-01-30 | 2019-08-06 | 武汉科技大学 | A kind of steel slag permeable foam concrete and preparation method thereof |
| CN108623270A (en) * | 2018-05-31 | 2018-10-09 | 宁波联城住工科技有限公司 | A kind of waterproof foam concrete formula and preparation method thereof |
| CN112225505A (en) * | 2020-10-19 | 2021-01-15 | 广东博智林机器人有限公司 | Foam concrete, preparation method thereof and composite material |
| CN112250382A (en) * | 2020-10-19 | 2021-01-22 | 广东博智林机器人有限公司 | Foamed concrete, preparation method thereof and composite material |
| CN115259894A (en) * | 2022-08-10 | 2022-11-01 | 浙江省二建建设集团有限公司 | Super-hydrophobic self-repairing foam concrete |
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Application publication date: 20120118 |