CN105016636B - A kind of gypsum slag cement insulation board and its preparation technology - Google Patents

A kind of gypsum slag cement insulation board and its preparation technology Download PDF

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CN105016636B
CN105016636B CN201510393532.0A CN201510393532A CN105016636B CN 105016636 B CN105016636 B CN 105016636B CN 201510393532 A CN201510393532 A CN 201510393532A CN 105016636 B CN105016636 B CN 105016636B
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cement
water
slag
flyash
insulation board
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CN105016636A (en
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潘钢华
洪斌
唐美玲
潘文佳
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Southeast University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

The invention discloses a kind of gypsum slag foam cement and its warming plate and preparation method, the raw material of the cement is made up of the component of following mass percent:Slag 80 90%, desulfurated plaster 10 15%, plaster of Paris 0 10%, calcium hydroxide 0 10%, lime stone 0 10%.The raw material of the warming plate is made up of the component of following parts by weight:Cement 2,400 4000, flyash 140 1200, water 1,600 2400, foam stabilizer 20 60, water reducer 0 10, foaming agent 100 300, fiber 0 30.The advantage of the invention is that:Recycling is carried out to desulfurated plaster, largely using trade wastes such as slag, flyash, and production process energy-conserving and environment-protective, there is good economy and environmental benefit.In addition, foaming insulation board of the present invention has the characteristics that light, insulation, fire-retardant, sound-proof sound-absorbing, production cost is low, and technique is simple.

Description

A kind of gypsum slag cement insulation board and its preparation technology
Technical field
The invention belongs to energy-saving building materialses field, and in particular to a kind of using gypsum slag cement as major gelled material Cement insulation board and preparation method thereof.
Background technology
In the ratio of major energy resource consumption, building energy consumption occupies higher proportion, and therefore, energy-saving building material certainly will As the developing direction of building material from now on, high-efficiency insulated novel wall material is developed to reducing building energy consumption and reaching energy-conservation Requirement suffer from great meaning.In exterior wall heat-preserving system, the insulation material generally used before is that EPS and XPS etc. has Machine high polymer material.Although their excellent thermal insulation performances, have and inflammable, easy to aging come off, repair and change complexity etc. significantly Shortcoming, it is particularly inflammable the defects of so that occur much to cause because of the fire disaster accident that causes of external wall insulation burning Huge casualties and property loss.Another with pimpled rubber powder mortar made of the porous light-weight materials such as perlite, though Solves fire safety problem, but its water absorption rate is higher, easily ftractures, so as to cause heat insulation effect bad.
Foam cement, it is to be mixed in proportion with water by foaming agent and high-speed stirred makes foam, and by foam and cement Slurry uniformly mixing, then carries out cast-in-place construction or mould molding, the one kind formed through natural curing contains a large amount of sealed porositys Novel light insulation material.Not only thermal conductivity factor is low for cement insulation board, high insulating effect, and does not burn, waterproof, with Wall cohesive force is strong, and intensity is high, nonhazardous radiogen, environmental protection, has turned into wall thermal insulating at present and fire-blocking belt is preferable Insulation material, but its feedstock silicate cement for using high energy consumption in preparation process, do not meet the requirement of energy-saving and emission-reduction.This Outside, it is also higher using silicate series cement manufacture foam cement cost.
Desulfurated plaster and slag are all accessory substance or waste material in industrial production, its wide material sources, abundance but utilization Rate is low.Product of the desulfurated plaster as coal fired thermal power plant wet lime-gypsum method flue gas desulfurization, it is a kind of extensive application prospect Trade waste.Its main application direction is to prepare the production such as the coagulant of concrete, plasterboard, gypsum block, brushing gypsum Product.The annual production of China's desulfurated plaster at present is about 60,000,000 tons, and utilization rate is about 83%, still has 10,200,000 tons to take off every year Sulphur gypsum accumulates landfill because that can not utilize.Also, the products such as existing desulfurated plaster sheet material, building block have the notable of poor water resistance Shortcoming.A kind of waste residue discharged when granulated blast-furnace slag is manUfaCtUre of pig iron from blast furnace.The yield of blast-furnace cinder is typically made a living 25%~50% or so of iron yield.China's pig iron yield in 2013 is 708,970,000 tons, estimates that annual caused blast-furnace cinder is total Amount is at least more than 200,000,000 tons.The utilization rate of China's blast-furnace cinder is 85% or so at present, from the deslagging then of developed country It is finished then, fully achieves recycling and also have larger distance.
By in the preparation of the cement applications prepared to cement insulation board, desulfurated plaster and smelting iron are efficiently utilized The trade waste resource such as waste residue, realizes the recycling of resource, has green, cheap advantage, has promoted building energy conservation Development.
Gypsum slag cement board prepared by the present invention is compared organic exterior wall such as the EPS being commonly used and XPS and protected Adiabator, its fire resistance is good, reaches non-ignitable rank (i.e. A levels);Secondly, compared to portland cement foam insulation board, its desulfurization Gypsum calcining temperature (700 DEG C) substantially reduces relative to portland cement sintering temperature (1450 DEG C), effectively reduces the energy and disappears Consumption, has good economic benefit.
The content of the invention
In order to overcome the deficiencies in the prior art, the present invention provides a kind of gypsum slag foam cement and by the cement Manufactured warming plate, preferable cement is obtained by suitable match ratio, method and corresponding stabilizer by chemical blowing Deng the pouring molding under relatively steady state, the excellent foaming of a kind of high-strength light, waterproof fireproofing, thermal and insulating performance is obtained Warming plate.
To achieve the above object, the technical solution adopted by the present invention is:
A kind of gypsum slag foam cement, its raw material are made up of the component of following mass percent:Slag 80-90%, take off Sulphur gypsum 10-15%, plaster of Paris 0-10%, calcium hydroxide 0-10%, lime stone 0-10%.
Further, the desulfurated plaster is the desulfurated plaster through 700 DEG C of calcining 1h, and passes through levigate processing.
Further, the slag is S95 or S105 miberal powder.
The preparation method of above-mentioned gypsum slag foam cement, comprises the following steps:
(1) desulfurated plaster is after 700 DEG C of calcinings one hour and with standby after ball mill grinding 35min;
(2) combined addition plaster of Paris, calcium hydroxide and agstone are as clinker in proportion, through laboratory ball mill grinding It is standby after 50min;
(3) desulfurated plaster, clinker, slag together grinding 1h are prepared into cement in proportion.
A kind of gypsum slag cement insulation board, its raw material are made up of the component of following parts by weight:Cement 2400- 4000th, flyash 140-1200, water 1600-2400, foam stabilizer 20-60, water reducer 0-10, foaming agent 100-300, fiber 0- 30;
The cement is above-mentioned gypsum slag foam cement.
Further, the foaming agent is that concentration is the hydrogen peroxide that mass concentration is 30%~40%.
Further, foam stabilizer used is calcium stearate.
Further, the water reducer is polycarboxylate water-reducer or naphthalene water reducer or aliphatic water reducing agent or other diminishings One kind in agent.
Further, the fiber is the one of polypropylene fibre or glass fibre that length is 5-20mm or basalt fibre Kind is several.
Further, the flyash is I levels or II grade of flyash;Water is running 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 stir in proportion, add complete The water in portion, stir 30s;For liquid-type water reducer, first water reducer is added in whole water and stirred, add cement, Flyash, fiber, stir 30s;
(2) foam stabilizer is added in the mixture of step (1) and stirs 1min;
(3) foaming agent is added in the mixture that step (2) obtains, stirs 5~7s;
(4) mixture that step (3) obtains is stood into form removal after 24h in being poured into 3~6s in mould.
The cement insulation board that the present invention has obtained using gypsum slag cement as binder materials can not only be poured with scene Note, may also be used for article of manufacture.Foaming degree is adjusted by changing foaming agent volume, insulation blocks can also be produced.
In the present invention, gypsum-slag is complex as major gelled material, and flyash collectively constitutes as auxiliary bonding component With gypsum slag foam cement compound system.Calcining components in desulfurization gypsum is CaSO4, and then contain SiO in granulated slag2、 Al2O3, activity is higher, in the basic conditions, two kinds of excitation mechanisms be present:Alkali-activated carbonatite and sulphate activation.Gypsum will be used as sulfuric acid Salt exciting agent makes slag aquation, and generation hydrated calcium aluminate sulfate compound is entringite (AFt) (3CaOAl2O3·3CaSO4· 32H2O) and low alkalinity hydrated calcium silicate C-S-H gels (chemical composition and form are not fixed, different with reaction condition and become Change).Entringite is hydraulic material, will be effectively improved the water resistance of gypsum, and C-S-H gels will improve whole compound system Intensity.And slag is may advantageously facilitate in the basic conditions decomposes generation calcium ion, aluminium ion and silicon ion, further reaction Generate entringite and C-S-H gels.Entringite is the main matter that early strength is provided in silicate hydrates, and Different Alkali Property environment under entringite yield will be caused different, thus basicity directly affects early stage strength of cement.When basicity is moderate, meet calcium alum Stone formation condition, entringite are separated out and are filled into the space of solid particle, and then improve the density and intensity of Behavior of Hardened Cement Paste.Net The C-S-H gels and part AFt, Ca (OH) of shape2Be interweaved and form compact texture together, a small amount of unhydrated slag powders and Desulfurated plaster is filled in the hole of hardenite, greatly reduces the quantity of the macropore and intercommunicating pore in hardenite structure, so as to Make binder materials that there is higher intensity and good water resistance.Flyash mainly contains substantial amounts of active SiO2And Al2O3, Itself and cementitious composite use, and can give full play to both activity, the development to the early strength and later strength of whole system Play very big effect.The addition of high efficiency water reducing agent can reduce overall water consumption, improve overall rheological characteristic and plasticity so that Intensity improves.Polypropylene fibre can improve the rupture strength of component, reduce and shrink, prevent structure crack.The addition of foam stabilizer The performance of foam cement can be improved, make the foam stabilization time longer.
The beneficial effects of the invention are as follows:
The present invention carries out recycling to desulfurated plaster, largely using trade wastes such as slag, flyash, and produces Process energy conservation environmental protection, has good economy and environmental benefit.In addition, foaming insulation board of the present invention have light, insulation, The features such as fire-retardant, sound-proof sound-absorbing, production cost is low, and technique is simple.
The foaming insulation board performance prepared using technical scheme is as follows:Dry density 225kg/m3, thermal conductivity factor 0.062W/ (mK), compression strength 0.56MPa, volume water absorption rate 7.5%.
Embodiment
The present invention is further described with reference to specific embodiment.
Embodiment 1
A kind of foaming insulation board using gypsum slag cement as major gelled material, its raw materials by weight portion, including with Lower component:Cement 2800, flyash 1200, water 2080, calcium stearate 60, naphthalene water reducer (pulvis) 10, hydrogen peroxide 208, Polypropylene fibre 20;Wherein, hydrogen peroxide uses mass concentration its quality is with H for 30% hydrogen peroxide2O2Meter;Polypropylene fibre Length be 5-20mm, flyash is I level flyash, and water is running water.
Wherein, the raw material of cement is made up of the component of following mass percent:Slag 80%, desulfurated plaster 15%, building Gypsum 3%, calcium hydroxide 1%, lime stone 1%.Wherein, slag is the miberal powder of S95 levels.
Its preparation method is:First by desulfurated plaster after 700 DEG C of calcinings one hour and with ball mill grinding 35min standby With (calcined gypsum to improve cement early strength);Combined addition plaster of Paris, calcium hydroxide and agstone are as ripe in proportion Material, it is standby after the ball mill grinding 50min of laboratory;In proportion by desulfurated plaster, clinker, slag together grinding 1h, water is prepared Mud.
After cement, flyash, water reducer, fiber stir in proportion, whole water is added, stirs 30s;Again will be hard Resin acid calcium is added thereto, and stirs 1min;Hydrogen peroxide is added, stirs 6~7s;Enter mould in 3~6s, stand form removal after 24h.
The 7d compression strength of this foam cement is 0.42MPa, and 28d compression strength is 0.56MPa, dry density 250kg/ m3, thermal conductivity factor 0.065W/ (mK), volume water absorption rate 8%.
Embodiment 2
A kind of foaming insulation board using gypsum slag cement as major gelled material, its raw materials by weight portion, including with Lower component:Cement 3200, flyash 800, water 2080, calcium stearate 60, polycarboxylate water-reducer (liquid) 10, hydrogen peroxide 208, Polypropylene fibre 20;Wherein, hydrogen peroxide uses mass concentration its quality is with H for 40% hydrogen peroxide2O2Meter, polypropylene fibre Length be 5-20mm, flyash is II grade of flyash, and water is running 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 miberal powder of S105 levels.
Its preparation method is:First by desulfurated plaster after 700 DEG C of calcinings one hour and with ball mill grinding 35min standby With (calcined gypsum to improve cement early strength);In proportion by desulfurated plaster, slag together grinding 1h, cement is prepared.
Proportionally, first water reducer is added in whole water and stirred, add cement, flyash, fiber, stirred 30s;Calcium stearate is added thereto again, stirs 1min;Hydrogen peroxide is added, stirs 6~7s;Enter mould in 3~6s, after standing 24h Form removal.
The 7d compression strength of this foam cement is 0.32MPa, and 28d compression strength is 0.46MPa, dry density 180kg/ m3, 0.055W/ (mK), volume water absorption rate 9%.
Embodiment 3
A kind of foaming insulation board using gypsum slag cement as major gelled material, its raw materials by weight portion, including with Lower component:Cement 2400, flyash 140, water 1600, calcium stearate 40, hydrogen peroxide 300, glass fibre 30;Wherein, peroxide Change hydrogen uses mass concentration, and for 35% hydrogen peroxide, its quality is with H2O2Meter, the length of glass fibre is 5-20mm, and flyash is II grade of flyash, water are running water.
Wherein, the raw material of cement is made up of the component of following mass percent:Slag 85%, desulfurated plaster 12%, building Gypsum 1%, calcium hydroxide 1%, lime stone 1%.Wherein, slag is S95 miberal powder.
Its preparation method is:First by desulfurated plaster after 700 DEG C of calcinings one hour and with ball mill grinding 35min standby With (calcined gypsum to improve cement early strength);Combined addition plaster of Paris, calcium hydroxide and agstone are as ripe in proportion Material, it is standby after the ball mill grinding 50min of laboratory;In proportion by desulfurated plaster, clinker, slag together grinding 1h, water is prepared Mud.
After cement, flyash, fiber stir in proportion, whole water is added, stirs 30s;By calcium stearate plus Enter wherein, stir 1min;Hydrogen peroxide is added, stirs 6~7s;Enter mould in 3~6s, stand form removal after 24h.
Embodiment 4
A kind of foaming insulation board using gypsum slag cement as major gelled material, its raw materials by weight portion, including with Lower component:Cement 4000, flyash 600, water 2400, calcium stearate 20, aliphatic water reducing agent (liquid) 5, hydrogen peroxide 100; Wherein, hydrogen peroxide uses mass concentration its quality is with H for 30% hydrogen peroxide2O2Meter;Flyash is I level flyash, and water is Running water.
Wherein, the raw material of cement is made up of the component of following mass percent:Slag 80%, desulfurated plaster 10%, lime Stone 10%.Wherein, slag is S95 miberal powder.
Its preparation method is:First by desulfurated plaster after 700 DEG C of calcinings one hour and with ball mill grinding 35min standby With (calcined gypsum to improve cement early strength);By agstone after the ball mill grinding 50min of laboratory it is standby;In proportion By desulfurated plaster, agstone, slag together grinding 1h, cement is prepared.
Proportionally, first water reducer is added in whole water and stirred, add cement, flyash, stir 30s; Calcium stearate is added thereto again, stirs 1min;Hydrogen peroxide is added, stirs 6~7s;Enter mould in 3~6s, torn open after standing 24h Mould.
Embodiment 5
A kind of foaming insulation board using gypsum slag cement as major gelled material, its raw materials by weight portion, including with Lower component:Cement 3000, flyash 800, water 2000, calcium stearate 40, aliphatic water reducing agent (liquid) 10, hydrogen peroxide 200, Fiber 15;Wherein, hydrogen peroxide uses mass concentration its quality is with H for 40% hydrogen peroxide2O2Meter;Fiber is polypropylene fibre With the mixing of glass fibre, its length is 5-20mm;Flyash is I level flyash, and water is running water.
Wherein, the raw material of cement is made up of the component of following mass percent:Slag 80%, desulfurated plaster 10%, niter Ash 10%.Wherein, slag is S95 miberal powder.
Its preparation method is:First by desulfurated plaster after 700 DEG C of calcinings one hour and with ball mill grinding 35min standby With (calcined gypsum to improve cement early strength);By lime after the ball mill grinding 50min of laboratory it is standby;In proportion will be de- Sulphur gypsum, lime, slag grinding 1h together, prepare cement.
Proportionally, first water reducer is added in whole water and stirred, add cement, flyash, fiber, stirred 30s;Calcium stearate is added thereto again, stirs 1min;Hydrogen peroxide is added, stirs 6~7s;Enter mould in 3~6s, after standing 24h Form removal.
Embodiment 6
A kind of foaming insulation board using gypsum slag cement as major gelled material, its raw materials by weight portion, including with Lower component:Cement 2400, flyash 600, water 2400, calcium stearate 60, naphthalene water reducer (pulvis) 10, hydrogen peroxide 100 are fine Dimension 30;Wherein, hydrogen peroxide uses mass concentration its quality is with H for 35% hydrogen peroxide2O2Meter;Fiber be polypropylene fibre and The mixing of glass fibre, its length are 5-20mm;Flyash is I level flyash, and water is running water.
Wherein, the raw material of cement is made up of the component of following mass percent:Slag 80%, desulfurated plaster 10%, building Gypsum 10%.Wherein, slag is S95 miberal powder.
Its preparation method is:First by desulfurated plaster after 700 DEG C of calcinings one hour and with ball mill grinding 35min standby With (calcined gypsum to improve cement early strength);By plaster of Paris after the ball mill grinding 50min of laboratory it is standby;In proportion By desulfurated plaster, plaster of Paris, slag together grinding 1h, cement is prepared.
After cement, flyash, water reducer, fiber stir in proportion, whole water is added, stirs 30s;Again will be hard Resin acid calcium is added thereto, and stirs 1min;Hydrogen peroxide is added, stirs 6~7s;
Enter mould in 3~6s, stand form removal after 24h.
Described above is only the preferred embodiment of the present invention, it should be pointed out that:For the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (4)

  1. A kind of 1. gypsum slag cement foaming insulation board, it is characterised in that:Its raw material is made up of the component of following parts by weight:Water Mud 2400-4000, flyash 140-1200, water 1600-2400, foam stabilizer 20-60, water reducer 0-10, foaming agent 100-300, Fiber 0-30;
    The cement is gypsum slag cement, and its raw material is made up of the component of following mass percent:Slag 80-90%, desulfurization stone Cream 10-15%, plaster of Paris 0-10%, calcium hydroxide 0-10%, lime stone 0-10%;The desulfurated plaster is through 700 DEG C of calcining 1h Desulfurated plaster, and pass through levigate processing;The slag is S95 or S105 miberal powder;
    The foam stabilizer is calcium stearate;
    The fiber is the one or more of the polypropylene fibre that length is 5-20mm or glass fibre or basalt fibre.
  2. 2. gypsum slag cement foaming insulation board as claimed in claim 1, it is characterised in that:The foaming agent is mass concentration For 30% ~ 40% hydrogen peroxide.
  3. 3. gypsum slag cement foaming insulation board as claimed in claim 1, it is characterised in that:The water reducer subtracts for polycarboxylic acids One kind in aqua or naphthalene water reducer or aliphatic water reducing agent.
  4. A kind of 4. preparation method of gypsum slag cement foaming insulation board as described in claim 1-3 is any, it is characterised in that: Comprise the following steps:
    (1)For powder-type water reducer, after cement, flyash, water reducer, fiber stir in proportion, add whole Water, stir 30s;For liquid-type water reducer, first water reducer is added in whole water and stirred, add cement, fine coal Ash, fiber, stir 30s;
    (2)Foam stabilizer is added into step(1)Mixture in stir 1min;
    (3)Foaming agent is added into step(2)In obtained mixture, 5 ~ 7s is stirred;
    (4)By step(3)Obtained mixture stands form removal after 24h in being poured into 3 ~ 6s in mould.
CN201510393532.0A 2015-07-07 2015-07-07 A kind of gypsum slag cement insulation board and its preparation technology Active CN105016636B (en)

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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

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CN1405108A (en) * 2001-08-15 2003-03-26 朴应模 Environment-protection type clinker-free cement and its preparation method
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CN102603245A (en) * 2012-03-08 2012-07-25 上海天补建筑科技有限公司 Composite foaming cement heat-insulation plate material
CN102815960A (en) * 2012-08-09 2012-12-12 江苏尼高科技有限公司 Composite foamed cement heat retaining panel using high-volume fly ash and preparation method thereof
CN103848580A (en) * 2014-02-20 2014-06-11 辽宁石化职业技术学院 Clinker-free slag portland cement and production method thereof

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