CN105016636A - Supersulphated foamed cement insulation board and preparation process thereof - Google Patents
Supersulphated foamed cement insulation board and preparation process thereof Download PDFInfo
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- CN105016636A CN105016636A CN201510393532.0A CN201510393532A CN105016636A CN 105016636 A CN105016636 A CN 105016636A CN 201510393532 A CN201510393532 A CN 201510393532A CN 105016636 A CN105016636 A CN 105016636A
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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
Abstract
The invention discloses a supersulphated foamed cement and an insulation board thereof, and preparation methods. The cement comprises raw materials composed of the following components by mass: 80 to 90% of slag, 10 to 15% of desulphurized gypsum, 0 to 10% of building gypsum, 0 to 10% of slaked lime and 0 to 10% of limestone. The insulation board comprises raw materials composed of the following components by weight: 2400 to 4000 parts of the cement, 140 to 1200 parts of fly ash, 1600 to 2400 parts of water, 20 to 60 parts of a foam stabilizer, 0 to 10 parts of a water reducer, 100 to 300 parts of a foaming agent and 0 to 30 parts of fiber. The invention has the following advantages: resource utilization of the desulfurized gypsum is realized; a great amount of industrial wastes like the slag and the fly ash are utilized; meanwhile, production process is energy-saving and environment-friendly; thus, good economic and environmental benefits are obtained. Moreover, the foamed insulation board provided by the invention has the characteristics of light weight, heat insulation, flame retardance, sound insulation and absorption, etc, and is low in production cost and simple in process.
Description
Technical field
The invention belongs to energy-saving building materials field, being specifically related to a kind of take gypsum slag cement as cement insulation board of major gelled material and preparation method thereof.
Background technology
In the ratio of each large energy consumption, building energy consumption occupies higher proportion, therefore, energy-saving building material certainly will become the developing direction of building material from now on, and developing high-efficiency insulated novel wall material has great meaning to reducing building energy consumption and reaching energy-conservation requirement.In exterior wall heat-preserving system, the lagging material before generally adopted is the organic polymer materials such as EPS and XPS.Although their excellent thermal insulation performance, but the obvious shortcoming such as have that inflammable, easily agingly come off, maintain and replace is complicated, particularly inflammable defect, makes to occur, much because external wall insulation burns the fire disaster accident caused, to cause huge loss of life and personal injury and property damage.Another pearl glue powder mortar made with porous light-weight materials such as perlites, though solve fire safety problem, but its water-intake rate is higher, easily ftractures, thus causes heat insulation effect not good.
Foam cement, be mixed in proportion also high-speed stirring by whipping agent and water to make foam, and by foam and grout Homogeneous phase mixing, then carry out cast-in-place construction or mould molding, through a kind of novel light lagging material containing a large amount of sealed porosity that natural curing is formed.Cement insulation board not only thermal conductivity is low, high insulating effect, and do not burn, waterproof is strong with body of wall cohesive force, intensity is high, toxicological harmless radiating material, environmental protection, has become the desirable lagging material of wall thermal insulating and fire-blocking belt at present, but its feedstock silicate cement energy consumption in preparation process used is high, does not meet the requirement of energy-saving and emission-reduction.In addition, silicate series cement is adopted to manufacture foam cement cost also higher.
Desulfurated plaster and slag are all by product in industrial production or waste material, its wide material sources, abundance but utilization ratio is low.Desulfurated plaster, as the product of coal fired thermal power plant wet lime-gypsum method flue gas desulfurization, is a kind of trade waste of extensive application prospect.Its main application direction is the products such as preparation concrete setting accelerator, plasterboard, gypsum block, brushing gypsum.The annual production of current China desulfurated plaster is probably 6,000 ten thousand tons, and utilization ratio is probably 83%, still has 1,020 ten thousand tons of desulfurated plasters to pile up landfill because utilizing every year.Further, the product such as existing desulfurated plaster sheet material, building block has the remarkable shortcoming of poor water resistance.A kind of waste residue of discharging from blast furnace when granulated blast-furnace slag is manUfaCtUre of pig iron.The generation of blast-furnace slag is generally about 25% ~ 50% of pig iron output.Within 2013, China's pig iron output is 70,897 ten thousand tons, and the annual blast-furnace slag total amount produced of estimation is at least more than 20,000 ten thousand tons.The utilization ratio of current China blast-furnace slag is about 85%, and the deslagging then from developed country is finished then, realizes resource utilization completely and also has larger distance.
By the cement applications prepared in the preparation of cement insulation board, efficiently utilize the trade waste resource such as desulfurated plaster and smelting iron waste residue, achieve the recycling of resource, there is green, cheap advantage, promoted the development of building energy conservation.
Gypsum slag cement board prepared by the present invention compares organic external-wall heat-insulation materials such as EPS and XPS generally used at present, and its resistivity against fire is good, reaches and does not fire rank (i.e. A level); Secondly, compared to portland cement foam insulation board, its desulphurization gypsum calcination temperature (700 DEG C) reduces greatly relative to silicate cement sintering temperature (1450 DEG C), effectively reduces energy consumption, has good economic benefit.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of gypsum slag foam cement and the warming plate by this cement production systD, good cement is obtained by suitable proportioning, build shaping under metastable state by the method and corresponding stablizer etc. of chemical foaming, obtain a kind of high-strength light, waterproof fireproofing, foaming insulation board that thermal and insulating performance is excellent.
For achieving the above object, the technical solution used in the present invention is:
A kind of gypsum slag foam cement, its raw material is made up of the component of following mass percent: slag 80-90%, desulfurated plaster 10-15%, plaster of Paris 0-10%, slaked lime 0-10%, Wingdale 0-10%.
Further, described desulfurated plaster is the desulfurated plaster through 700 DEG C of calcining 1h, and through levigate process.
Further, described slag is the breeze of S95 or S105.
The preparation method of above-mentioned gypsum slag foam cement, comprises the following steps:
(1) desulfurated plaster is also used after ball mill grinding 35min for subsequent use through 700 DEG C of calcinings after one hour;
(2) combined addition plaster of Paris, slaked lime and limestone powder are as grog in proportion, for subsequent use after the ball mill grinding 50min of laboratory;
(3) in proportion by desulfurated plaster, grog, slag together grinding 1h, cement is prepared.
A kind of gypsum slag cement insulation board, its raw material is made up of the component of following parts by weight: cement 2400-4000, flyash 140-1200, water 1600-2400, suds-stabilizing agent 20-60, water reducer 0-10, whipping agent 100-300, fiber 0-30;
Described cement is above-mentioned gypsum slag foam cement.
Further, described whipping agent is concentration to be mass concentration be 30% ~ 40% hydrogen peroxide.
Further, suds-stabilizing agent used is calcium stearate.
Further, described water reducer is the one in polycarboxylate water-reducer or naphthalene water reducer or aliphatic water reducing agent or other water reducer.
Further, described fiber is length is the polypropylene fibre of 5-20mm or one or more of glass fibre or basalt fibre.
Further, described flyash is I level or II grade of flyash; Water is tap water.
The preparation method of above-mentioned gypsum slag cement insulation board, comprises the following steps:
(1) for powder-type water reducer, after cement, flyash, water reducer, fiber being stirred in proportion, add whole water, stir 30s; For liquid-type water reducer, first water reducer is added in whole water and stir, then add cement, flyash, fiber, stir 30s;
(2) suds-stabilizing agent is added in the mixture of step (1) and stir 1min;
(3) whipping agent is added in the mixture that step (2) obtains, stir 5 ~ 7s;
(4) mixture that step (3) obtains is poured in mould in 3 ~ 6s, form removal after standing 24h.
It is that the cement insulation board of gelling material not only can use cast-in-site that the present invention obtains with gypsum slag cement, also can be used for article of manufacture.Regulating foaming degree by changing whipping agent volume, can also insulation blocks be produced.
In the present invention, gypsum-slag is complex as major gelled material, and flyash, as auxiliary bonding component, constitutes jointly with gypsum slag foam cement compound system.Calcining components in desulfurization gypsum is CaSO
4, then containing SiO in granulated slag
2, Al
2o
3, activity is higher, in the basic conditions, there are two kinds of excitation mechanisms: alkali-activated carbonatite and sulphate activation.Gypsum will make slag aquation as sulphate activation agent, generate hydrated calcium aluminate sulfate compound and ettringite (AFt) (3CaOAl
2o
33CaSO
432H
2and low alkalinity hydrated calcium silicate C-S-H gel (chemical constitution and form are not fixed, all different with reaction conditions and change) O).Ettringite is hydraulic material, will effectively improve the water tolerance of gypsum, and C-S-H gel will improve the intensity of whole compound system.And be conducive to promoting that slag decomposes in the basic conditions and produce calcium ion, aluminum ion and silicon ion, reaction generates ettringite and C-S-H gel further.Ettringite is the essential substance providing early strength in silicate hydrates, and ettringite output will be caused under different alkaline environment different, and thus basicity directly affects early stage strength of cement.When basicity is moderate, meet ettringite formation condition, ettringite is separated out and is filled in the space of solid particulate, and then improves density and the intensity of Behavior of Hardened Cement Paste.Netted C-S-H gel and part AFt, Ca (OH)
2be interweaved and form dense structure together, a small amount of unhydrated slag powders and desulfurated plaster are filled in the hole of hardenite, greatly reduce the quantity of macropore in hardenite structure and communicating aperture, thus make gelling material have higher intensity and good water tolerance.The main of flyash contains a large amount of active SiO
2and Al
2o
3, itself and cementitious composite use, and can give full play to both activity, play very large effect to the early strength of whole system and the development of later strength.Adding of high efficiency water reducing agent can reduce overall water consumption, improves bulk flow sex change and plasticity-, intensity is improved.Polypropylene fibre can improve the folding strength of component, reduces and shrinks, prevent structure crack.Suds-stabilizing agent add the performance can improving foam cement, make the foam stabilization time longer.
The invention has the beneficial effects as follows:
The present invention carries out recycling to desulfurated plaster, utilizes the trade waste such as slag, flyash in a large number, and production process energy-conserving and environment-protective, there is good economy and environment benefit.In addition, foaming insulation board of the present invention has the features such as light weight, heat insulating, fire-retardant, sound-proof sound-absorbing, and production cost is low, and technique is simple.
The foaming insulation board performance adopting technical scheme of the present invention to prepare is as follows: dry density 225kg/m
3, thermal conductivity 0.062W/ (mK), ultimate compression strength 0.56MPa, volume water absorption rate 7.5%.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment 1
Take gypsum slag cement as a foaming insulation board for major gelled material, its raw materials by weight portion, comprises following component: cement 2800, flyash 1200, water 2080, calcium stearate 60, naphthalene water reducer (pulvis) 10, hydrogen peroxide 208, polypropylene fibre 20; Wherein, hydrogen peroxide adopts mass concentration to be the hydrogen peroxide of 30%, and its quality is with H
2o
2meter; The length of polypropylene fibre is 5-20mm, and flyash is I level flyash, and water is tap water.
Wherein, the raw material of cement is made up of the component of following mass percent: slag 80%, desulfurated plaster 15%, plaster of Paris 3%, slaked lime 1%, Wingdale 1%.Wherein, slag is the breeze of S95 level.
Its preparation method is: first also use after ball mill grinding 35min (calcined gypsum is to improve cement early strength) for subsequent use by desulfurated plaster after one hour through 700 DEG C of calcinings; Combined addition plaster of Paris, slaked lime and limestone powder are as grog in proportion, for subsequent use after the ball mill grinding 50min of laboratory; In proportion by desulfurated plaster, grog, slag together grinding 1h, prepare cement.
After cement, flyash, water reducer, fiber being stirred in proportion, add whole water, stir 30s; Again calcium stearate is added wherein, stir 1min; Add hydrogen peroxide, stir 6 ~ 7s; Mould is entered, form removal after standing 24h in 3 ~ 6s.
The 7d ultimate compression strength of this foam cement is 0.42MPa, 28d ultimate compression strength is 0.56MPa, dry density 250kg/m
3, thermal conductivity 0.065W/ (mK), volume water absorption rate 8%.
Embodiment 2
Take gypsum slag cement as a foaming insulation board for major gelled material, its raw materials by weight portion, comprises following component: cement 3200, flyash 800, water 2080, calcium stearate 60, polycarboxylate water-reducer (liquid) 10, hydrogen peroxide 208, polypropylene fibre 20; Wherein, hydrogen peroxide adopts mass concentration to be the hydrogen peroxide of 40%, and its quality is with H
2o
2meter, the length of polypropylene fibre is 5-20mm, and flyash is II grade of flyash, and water is tap water.
Wherein, the raw material of cement is made up of the component of following mass percent: slag 90%, desulfurated plaster 10%.Wherein, slag is the breeze of S105 level.
Its preparation method is: first also use after ball mill grinding 35min (calcined gypsum is to improve cement early strength) for subsequent use by desulfurated plaster after one hour through 700 DEG C of calcinings; In proportion by desulfurated plaster, slag together grinding 1h, prepare cement.
Proportionally, first water reducer is added in whole water and stir, then add cement, flyash, fiber, stir 30s; Again calcium stearate is added wherein, stir 1min; Add hydrogen peroxide, stir 6 ~ 7s; Mould is entered, form removal after standing 24h in 3 ~ 6s.
The 7d ultimate compression strength of this foam cement is 0.32MPa, 28d ultimate compression strength is 0.46MPa, dry density 180kg/m
3, 0.055W/ (mK), volume water absorption rate 9%.
Embodiment 3
Take gypsum slag cement as a foaming insulation board for major gelled material, its raw materials by weight portion, comprises following component: cement 2400, flyash 140, water 1600, calcium stearate 40, hydrogen peroxide 300, glass fibre 30; Wherein, hydrogen peroxide adopts mass concentration to be the hydrogen peroxide of 35%, and its quality is with H
2o
2meter, the length of glass fibre is 5-20mm, and flyash is II grade of flyash, and water is tap water.
Wherein, the raw material of cement is made up of the component of following mass percent: slag 85%, desulfurated plaster 12%, plaster of Paris 1%, slaked lime 1%, Wingdale 1%.Wherein, slag is the breeze of S95.
Its preparation method is: first also use after ball mill grinding 35min (calcined gypsum is to improve cement early strength) for subsequent use by desulfurated plaster after one hour through 700 DEG C of calcinings; Combined addition plaster of Paris, slaked lime and limestone powder are as grog in proportion, for subsequent use after the ball mill grinding 50min of laboratory; In proportion by desulfurated plaster, grog, slag together grinding 1h, prepare cement.
After cement, flyash, fiber being stirred in proportion, add whole water, stir 30s; Calcium stearate is added wherein, stir 1min; Add hydrogen peroxide, stir 6 ~ 7s; Mould is entered, form removal after standing 24h in 3 ~ 6s.
Embodiment 4
Take gypsum slag cement as a foaming insulation board for major gelled material, its raw materials by weight portion, comprises following component: cement 4000, flyash 600, water 2400, calcium stearate 20, aliphatic water reducing agent (liquid) 5, hydrogen peroxide 100; Wherein, hydrogen peroxide adopts mass concentration to be the hydrogen peroxide of 30%, and its quality is with H
2o
2meter; Flyash is I level flyash, and water is tap water.
Wherein, the raw material of cement is made up of the component of following mass percent: slag 80%, desulfurated plaster 10%, Wingdale 10%.Wherein, slag is the breeze of S95.
Its preparation method is: first also use after ball mill grinding 35min (calcined gypsum is to improve cement early strength) for subsequent use by desulfurated plaster after one hour through 700 DEG C of calcinings; Limestone powder is for subsequent use after the ball mill grinding 50min of laboratory; In proportion by desulfurated plaster, limestone powder, slag together grinding 1h, prepare cement.
Proportionally, first water reducer is added in whole water and stir, then add cement, flyash, stir 30s; Again calcium stearate is added wherein, stir 1min; Add hydrogen peroxide, stir 6 ~ 7s; Mould is entered, form removal after standing 24h in 3 ~ 6s.
Embodiment 5
Take gypsum slag cement as a foaming insulation board for major gelled material, its raw materials by weight portion, comprises following component: cement 3000, flyash 800, water 2000, calcium stearate 40, aliphatic water reducing agent (liquid) 10, hydrogen peroxide 200, fiber 15; Wherein, hydrogen peroxide adopts mass concentration to be the hydrogen peroxide of 40%, and its quality is with H
2o
2meter; Fiber is the mixing of polypropylene fibre and glass fibre, and its length is 5-20mm; Flyash is I level flyash, and water is tap water.
Wherein, the raw material of cement is made up of the component of following mass percent: slag 80%, desulfurated plaster 10%, slaked lime 10%.Wherein, slag is the breeze of S95.
Its preparation method is: first also use after ball mill grinding 35min (calcined gypsum is to improve cement early strength) for subsequent use by desulfurated plaster after one hour through 700 DEG C of calcinings; Lime is for subsequent use after the ball mill grinding 50min of laboratory; In proportion by desulfurated plaster, lime, slag together grinding 1h, prepare cement.
Proportionally, first water reducer is added in whole water and stir, then add cement, flyash, fiber, stir 30s; Again calcium stearate is added wherein, stir 1min; Add hydrogen peroxide, stir 6 ~ 7s; Mould is entered, form removal after standing 24h in 3 ~ 6s.
Embodiment 6
Take gypsum slag cement as a foaming insulation board for major gelled material, its raw materials by weight portion, comprises following component: cement 2400, flyash 600, water 2400, calcium stearate 60, naphthalene water reducer (pulvis) 10, hydrogen peroxide 100, fiber 30; Wherein, hydrogen peroxide adopts mass concentration to be the hydrogen peroxide of 35%, and its quality is with H
2o
2meter; Fiber is the mixing of polypropylene fibre and glass fibre, and its length is 5-20mm; Flyash is I level flyash, and water is tap water.
Wherein, the raw material of cement is made up of the component of following mass percent: slag 80%, desulfurated plaster 10%, plaster of Paris 10%.Wherein, slag is the breeze of S95.
Its preparation method is: first also use after ball mill grinding 35min (calcined gypsum is to improve cement early strength) for subsequent use by desulfurated plaster after one hour through 700 DEG C of calcinings; Plaster of Paris is for subsequent use after the ball mill grinding 50min of laboratory; In proportion by desulfurated plaster, plaster of Paris, slag together grinding 1h, prepare cement.
After cement, flyash, water reducer, fiber being stirred in proportion, add whole water, stir 30s; Again calcium stearate is added wherein, stir 1min; Add hydrogen peroxide, stir 6 ~ 7s;
Mould is entered, form removal after standing 24h in 3 ~ 6s.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a gypsum slag foam cement, is characterized in that: its raw material is made up of the component of following mass percent: slag 80-90%, desulfurated plaster 10-15%, plaster of Paris 0-10%, slaked lime 0-10%, Wingdale 0-10%.
2. gypsum slag foam cement as claimed in claim 1, is characterized in that: described desulfurated plaster is the desulfurated plaster through 700 DEG C of calcining 1h, and through levigate process.
3. gypsum slag foam cement as claimed in claim 1, is characterized in that: described slag is the breeze of S95 or S105.
4. a preparation method for the gypsum slag foam cement as described in as arbitrary in claim 1-3, is characterized in that: comprise the following steps:
(1) desulfurated plaster is also used after ball mill grinding 35min for subsequent use through 700 DEG C of calcinings after one hour;
(2) combined addition plaster of Paris, slaked lime and limestone powder are as grog in proportion, for subsequent use after ball mill grinding 50min;
(3) in proportion by desulfurated plaster, grog, slag together grinding 1h, cement is prepared.
5. a gypsum slag cement insulation board, is characterized in that: its raw material is made up of the component of following parts by weight: cement 2400-4000, flyash 140-1200, water 1600-2400, suds-stabilizing agent 20-60, water reducer 0-10, whipping agent 100-300, fiber 0-30;
Described cement is the arbitrary described gypsum slag foam cement of claim 1-3.
6. gypsum slag cement insulation board as claimed in claim 5, is characterized in that: described whipping agent to be mass concentration be 30% ~ 40% hydrogen peroxide.
7. gypsum slag cement insulation board as claimed in claim 5, is characterized in that: suds-stabilizing agent used is calcium stearate.
8. gypsum slag cement insulation board as claimed in claim 5, is characterized in that: described water reducer is the one in polycarboxylate water-reducer or naphthalene water reducer or aliphatic water reducing agent.
9. gypsum slag cement insulation board as claimed in claim 5, is characterized in that: described fiber is length is the polypropylene fibre of 5-20mm or one or more of glass fibre or basalt fibre.
10. a preparation method for the gypsum slag cement insulation board as described in as arbitrary in claim 5-9, is characterized in that: comprise the following steps:
(1) for powder-type water reducer, after cement, flyash, water reducer, fiber being stirred in proportion, add whole water, stir 30s; For liquid-type water reducer, first water reducer is added in whole water and stir, then add cement, flyash, fiber, stir 30s;
(2) suds-stabilizing agent is added in the mixture of step (1) and stir 1min;
(3) whipping agent is added in the mixture that step (2) obtains, stir 5 ~ 7s;
(4) mixture that step (3) obtains is poured in mould in 3 ~ 6s, form removal after standing 24h.
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| CN201510393532.0A CN105016636B (en) | 2015-07-07 | 2015-07-07 | A kind of gypsum slag cement insulation board and its preparation technology |
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| CN109053118A (en) * | 2018-11-06 | 2018-12-21 | 海门市智达建筑材料科技有限公司 | A kind of production technology of the high-intensitive PC plate of building trade |
| WO2020197986A1 (en) * | 2019-03-27 | 2020-10-01 | Washington State University | Conversion of gypsum waste into foamed construction material |
| CN113004055A (en) * | 2021-05-06 | 2021-06-22 | 太原龙投富思特新材料科技有限公司 | Green high-thermal-resistance self-insulation building block and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109053118A (en) * | 2018-11-06 | 2018-12-21 | 海门市智达建筑材料科技有限公司 | A kind of production technology of the high-intensitive PC plate of building trade |
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| CN114105559A (en) * | 2021-11-24 | 2022-03-01 | 石家庄铁道大学 | Green non-fired high-temperature-resistant cement-based material and preparation and detection methods thereof |
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|---|---|
| CN105016636B (en) | 2017-12-19 |
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