CN1053647C - Coal gangue concrete products and preparing method thereof - Google Patents

Coal gangue concrete products and preparing method thereof Download PDF

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Publication number
CN1053647C
CN1053647C CN96115369A CN96115369A CN1053647C CN 1053647 C CN1053647 C CN 1053647C CN 96115369 A CN96115369 A CN 96115369A CN 96115369 A CN96115369 A CN 96115369A CN 1053647 C CN1053647 C CN 1053647C
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coal gangue
concrete
light
preparation
gangue concrete
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CN1167738A (en
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袁成杰
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FUXIN FANGCHAN BUILDING MEMBER FACTORY
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FUXIN FANGCHAN BUILDING MEMBER FACTORY
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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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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Abstract

The present invention belongs to building concrete members, which particularly relates to a coal gangue concrete product and a preparation method thereof by using self combustible coal gangue as main material. The particle diameter of light coarse aggregate of self combustible coal gangue is 5 to 30mm, and the strength of the cylinder pressure is 7 to 8MPa; the particle diameter of light fine aggregate is 0 to 5mm, and the fineness modulus is 2.8 to 4.0; the light coarse aggregate, the light fine aggregate, cement and water are stirred; a mould is erected, and a reinforced bar mesh is arranged on the mould; the light coarse aggregate, the light fine aggregate, cement and water which are stirred are poured on a steel plate hot mould table socket with an open web, vibrated to be compact and maintained in a dry-wet heat mode, and then pass through four battery limits of preheating, temperature rise, constant temperature and temperature drop; the temperature is 80DEG C to 95DEG C, the production period is 24 hours, and the demoulding hoisting strength reaches 80 to 90% of the design grade; the coal gangue concrete product of the present invention can be made into members such as whole room plates, balcony plates, ladder flights, beams, trench plates, etc., with the concrete strength grade of CL15, CL20, CL25 and CL30.

Description

Coal gangue concrete products and preparation method
The invention belongs to building concrete member, particularly a kind of is the coal gangue concrete products and the preparation method of major ingredient preparation with the self-igniting coal gangue.
At present, in the concrete of ordinary construction, aggregate accounts for the 70-80% of sclerosis back volume, this class concrete is an aggregate with the natural sand masonry, its proportioning is 1: 2: 4, and the natural sand masonry is a coarse-fine aggregate production cost height, from great, intensity is low, changes with light thick, the fine aggregate of the bastard coal masonry structural concrete of spontaneous combustion then beyond example.Vapor cure is generally adopted in this external making concrete product maintenance, and a kind of is steam curing kiln, by steam comb discharged steam in kiln, and the curing concrete member, this structure power consumption is high, and curing cycle is long.The another kind of shallow pond concrete pedestal that adopts, button cover in shallow pond feeds the maintenance of steam heat temperature, at operation process pedestal is pounded and to be hit and to collide that to cause pedestal to occur damaged, influence the visual appearance of panels face, concrete pedestal heat conductivility is bad, and the pedestal temperature is low, steam consumption is big, the cost height causes curing cycle long, and labour productivity is low, maintenance temperature, the humidity of concrete member be can not satisfy, component strength and technical feature influenced.
The objective of the invention is to overcome above technical deficiency, providing a kind of is light thick, fine aggregate with the self-igniting coal gangue, does with empty stomach steel plate hot-die pedestal---coal gangue concrete products of hydrothermal curing technology and preparation method thereof.
Task of the present invention is that coal gangue concrete products is applicable to the coal gangue of spontaneous combustion, and through chemical analysis and determination of activity, loss on ignition is not more than 5%, SO 3Content is not more than 1%, 30 day 15 times lime absorption values and is not less than 30 milligrams/gram, fineness 4900 holes/centimetre 2Screen over-size is not more than 8%, the light coarse aggregate 41-44.7% of coal gangue, the light fine aggregate 23.5-26% of coal gangue, cement 17.2-20%, add water 10.0-13.3% and fully stir into half moisture state mixture, the slump is 30-50mm, and generating C-S-H (I) and C-S-H (II) is main C-S-H crystallite or armorphous hydrated calcium silicate; C 3AH 6And C 4AH 11-19Drated calcium aluminate, C 13FH 6And C 4FH 13Hydrated calcium ferrite, C 3AL, CaSO 4, 12H 2O aquation calcium sulphoaluminate and Ca (OH) 2The crystal hydrated product, basic identical with the aquation of silicate cement, coal gangue goods mesosilicic acid salts contg reaches more than 70%, after coal gangue concrete after stirring is poured into mould, on empty stomach steel plate hot-die pedestal, do-hydrothermal curing, through precuring, intensification, constant temperature, four battery limit (BL)s of cooling, increase coverture on the concrete surface and keep temperature, humidity, top temperature is 80-95 ℃, good heat conductivity, the temperature homogeneous and controllable makes aquation abundant, and degree of crystallinity improves, improved the concrete strength rate of growth, demould time is 24 hours, raises labour productivity, and reduces energy consumption.
Coal gangue concrete products and preparation method, with the coal gangue is light thick, fine aggregate, utilize waste residue, cost is low, reduces and pollutes, goods unit weight is low, intensity is high, utilize empty stomach steel plate hot-die pedestal that coal gangue concrete is done---hydrothermal curing, the concrete structure is improved, aquation is abundant, concrete does not have serious dehydration, promotes later stage goods aquation gain in strength.
Specify with by way of example below in conjunction with accompanying drawing.
Fig. 1 shows coal gangue concrete products steel plate hot-die pedestal one-piece construction figure on an empty stomach.
Fig. 2 shows coal gangue concrete products steel plate hot-die pedestal monomer sectional view on an empty stomach.
Fig. 3 shows that coal gangue concrete products is dried---the hydrothermal curing heating curve.
Coal gangue concrete products is by light thick, the fine aggregate of the coal gangue of cement, granulation, water, reinforcing bar preparation, and its main ingredient is:
(1) choosing particle diameter is 5-30mm, tap density 1100-1200kg/m 3, cylindrical compress strength 7-8MPa, water-intake rate 7-8% the light coarse aggregate of broken stone type, choosing particle diameter is 0-5mm, tap density 1050-1150kg/m 3, fineness chooses the light fine aggregate of coal gangue of 2.8-4.0.
(2) the light coarse aggregate 41-44.7% of broken stone type coal gangue
The light fine aggregate 23.5-26% of coal gangue
Cement 425# 17.2-20%
Water 10.0-13.3%
The coal gangue concrete preparation is produced, coal gangue concrete that above-mentioned formulated is good stirs---formwork---inject steel plate hot-die pedestal on an empty stomach---Sunken wire tube, line box, give box out, post mouth mould---the bottom concrete vibrates, coal gangue concrete is done at empty stomach steel plate hot-die pedestal---hydrothermal curing, and through precuring, intensification, constant temperature, four battery limit (BL)s of cooling.Coal gangue concrete churning time 〉=180 second, the slump is 30-50mm.Coal gangue concrete is the 4-6 hour precuring time of empty stomach steel plate hot-die pedestal, temperature 20-30 ℃.Relative intensity 20-30%, the precuring process improves the concrete structure initial strength, strengthens the resistivity to structure deteriorate, reduces concrete cubic deformation greatly; Coal gangue concrete was at intensification battery limit (BL) time 3-4 hour of empty stomach steel plate hot-die pedestal, intensification 15-20 ℃/hour, relative intensity 40-50%, this process plastic covering film is in advance preserved moisture, this moment, steam entered heat conduction chamber circulation heating steel plate hot-die body by main line steam vent exhaust vapour, and hot-die conducts heat, good heat conductivity, hydrated reaction of cement speeds up in temperature-rise period, finishes to have obtained certain hardening strength to heating up.Coal gangue concrete was at constant temperature battery limit (BL) time 4-6 hour of empty stomach steel plate hot-die pedestal, and temperature 80-95 ℃, relative intensity reaches 70-90%; Coal gangue concrete is 3-4 hour in the cooling battery limit (BL) time of empty stomach steel plate hot-die pedestal, cooling rate≤20-25 ℃/hour, and member envrionment temperature≤30 ℃ after the demoulding, cooling rate is unsuitable excessive, avoids excessive temperature differentials, mass defect occurs.The coal gangue concrete products strength grade is CL 15, CL 20, CL 25, CL 30
Example one
By weight (in 1 cubic metre of concrete), get the light coarse aggregate 960kg of coal gangue, the light fine aggregate 545kg of coal gangue, cement (Portland cement 425#) 365kg, water 280kg, water cement ratio 0.49, through fully stirring 180 seconds, pour into the bottom surface and be steel plate table top on an empty stomach, all around in the mould that combines by angle steel, vibrate, wipe one's face, press polish, do---hydrothermal curing, through precuring, intensification, constant temperature, four battery limit (BL)s of cooling, worked to hang out the pond in 24 hours, promptly get whole floor of coal gangue concrete, its ultimate compression strength is 16.8MPa, reaches design label 84%.
Example two
By weight (in 1 cubic metre of concrete), take by weighing the light coarse aggregate 950kg of coal gangue, the light fine aggregate 550kg of coal gangue, cement (trass cement 425#) 370kg, water 280kg, water cement ratio 0.48, after fully stirring, pour in the mould, vibrate, wipe one's face, press polish, do-hydrothermal curing, through precuring, intensification, constant temperature, four battery limit (BL)s of cooling, went out the pond in 24 hours, obtain whole floor goods of coal gangue concrete, ultimate compression strength reaches 17.0MPa, reaches 85% of design label.
Example three
By weight (in 1 cubic metre of concrete), get the light coarse aggregate 875kg of coal gangue, the light fine aggregate 525kg of coal gangue, cement (trass cement 425#) 420kg, water 280kg, water cement ratio 0.43 is in stirring pours into mould, vibration compacting, wipe one's face, press polish, do-hydrothermal curing, through precuring, intensification, constant temperature, four battery limit (BL)s of cooling, went out the pond in 24 hours, obtain whole floor goods of coal gangue, recording ultimate compression strength is 22.3MPa, reaches 89% of design label.
Example four
Produce whole stair goods by weight (in 1 cubic metre of concrete), press water cement ratio 0.48, get the light coarse aggregate 955kg of coal gangue, the light fine aggregate 550kg of coal gangue, cement (Portland cement 425#) 370kg, water 280kg stirred 180 seconds through stirrer, pour in the whole punching block, earlier use the vibrating spear vibration compacting, smear with wood again and clap, wipe one's face with iron, the band mould is done---hydrothermal curing, through precuring, intensification, constant temperature, four battery limit (BL)s of cooling, the lifting demoulding in 24 hours obtains whole stair, ultimate compression strength is 20.6MPa, reaches 103% of design label.
Example five
By weight (in 1 cubic metre of concrete), get the light coarse aggregate 950kg of coal gangue, the light fine aggregate 540kg of coal gangue, cement (trass cement 425#) 375kg, water 280kg, water cement ratio 0.48, mix to stir and pour in the integral plate, through vibrate, troweling, pressure surface, then do---hydrothermal curing, through precuring, intensification, constant temperature, four battery limit (BL)s of cooling, the lifting demoulding in 24 hours, promptly get whole stair, its intensity can reach 19.8MPa, reaches 99% of design label.
Example six
Production intensity grade C 30Staircase component by weight (in 1 cubic metre of concrete), is got cement (425# Portland cement) 465kg, the light coarse aggregate 860kg of coal gangue, the light fine aggregate 495kg of coal gangue, water 280kg, water cement ratio 0.39, through fully stir, go into mould, vibrate, wipe one's face, press polish, it is steam-cured to change in the kiln band mould over to, do---hydrothermal curing, through precuring, intensification, constant temperature, four battery limit (BL)s of cooling, went out the pond demoulding in 24 hours, obtain whole stair goods, its intensity reaches 30.5MPa, reaches 92% of design label.
Example seven
Coal gangue concrete balcony slab, by weight (calculating) with 1 cubic metre of concrete, take by weighing the light coarse aggregate 953kg of coal gangue, the light fine aggregate 552kg of coal gangue, cement (Portland cement 425#) 365kg, water 280kg, water cement ratio 0.49 mixes fully and stirred 180 seconds, then pours in the mould, with vibrating spear, flat board vibrate jolt ramming, wipe one's face, cover plastic film and do-hydrothermal curing, through precuring, intensification, constant temperature, four battery limit (BL)s of cooling, worked to hang out the pond in 24 hours, be coal gangue concrete balcony slab, recording ultimate compression strength is 18.4MPa, reaches 92% of design label.
Example eight
By weight (in 1 cubic metre of concrete), produce coal gangue concrete balcony slab, mountain ash concrete (425#) 370kg gets fire, the light coarse aggregate 960kg of coal gangue, the light fine aggregate 540kg of coal gangue, add water 280kg, water cement ratio 0.48, after mix stirring 180 seconds, pour in the mould, smash shake closely knit, wipe one's face, do---hydrothermal curing, through precuring, intensification, constant temperature, four battery limit (BL)s of cooling, went out the pond lifting in 24 hours, obtain coal gangue concrete balcony slab, recording ultimate compression strength is 17.6MPa, reaches 88% of design label.
Example nine
By weight (in 1 cubic metre of concrete), take by weighing the light coarse aggregate 870kg of coal gangue, the light fine aggregate 530kg of coal gangue, cement (Portland cement 425#) 420kg adds water 280kg, water cement ratio 0.43, mix and produce the balcony slab goods, after stirring 180 seconds, pour in the mould, smash and shake, clap, wipe one's face, do---hydrothermal curing, through precuring, intensification, constant temperature, four battery limit (BL)s of cooling, rose in 24 hours and hang out the pond, promptly get coal gangue concrete balcony slab, ultimate compression strength is 23.6MPa, reaches design label 94%.
Technical performance index
The design strength grade of concrete Observed strength grade MPa Elastic modulus E 10 4 MPa Dry capacity kg/cm 3 Water-intake rate % Freeze proof label
CL 15 CL 20 CL 25 CL 30 16.3 22.9 28.6 32.1 1.60 1.76 2.10 2.69 1632 1890 1910 1940 9.2 8.0 6.8 ＞M50 ＞M50 ＞M50 ＞M50
Utilize self-igniting coal gangue to manufacture the coal gangue goods by empty stomach steel plate hot-die pedestal production technique, all better from heavy and light, weather resistance, thermotolerance, frost resistance, concrete strength grade reaches CL 15, CL 20, CL 25, CL 30The design label can be made members such as whole floor of concrete, balcony slab, bench, beam, trench plate.

Claims (7)

1, the coal gangue concrete products of the light coarse aggregate of a kind of coal gangue by cement, granulation, light fine aggregate, water, reinforcing bar preparation is characterized in that main ingredient is:
(1) choosing particle diameter is 5-30mm, tap density 1100-1200kg/m 3, cylindrical compress strength 7-8MPa, water-intake rate 7-8% the light coarse aggregate of broken stone type, choosing particle diameter is 0-5mm, tap density 1050-1150kg/m 3, fineness modulus chooses the light fine aggregate of coal gangue of 2.8-4.0;
(2) the light coarse aggregate 41-44.7% of broken stone type coal gangue
The light fine aggregate 23.5-26% of coal gangue
Cement 425# 17.2-20%
Water 10.0-13.3%
2. the preparation method of the coal gangue concrete products of the light coarse aggregate of the coal gangue by cement, granulation, light fine aggregate, water, reinforcing bar preparation; it is characterized in that coal gangue concrete does at empty stomach steel plate hot-die pedestal-hydrothermal curing, through precuring, intensification, constant temperature, four battery limit (BL)s of cooling.
3. the preparation method of coal gangue concrete products according to claim 2 is characterized in that coal gangue concrete churning time 〉=80 second, and the slump is 30-50mm.
4. the preparation method of coal gangue concrete products according to claim 2 is characterized in that coal gangue concrete does at empty stomach steel plate hot-die pedestal---hydrothermal curing, precuring battery limit (BL) time 4-6 hour, temperature 20-30 ℃, relative intensity 20-30%.
5. the preparation method of coal gangue concrete products according to claim 2 is characterized in that coal gangue concrete does at empty stomach steel plate hot-die pedestal---hydrothermal curing, intensification battery limit (BL) time 3-4 hour, intensification 15-20 ℃/hour, relative intensity 40-50%.
6. the preparation method of coal gangue concrete products according to claim 2 is characterized in that coal gangue concrete does at empty stomach steel plate hot-die pedestal---hydrothermal curing, constant temperature battery limit (BL) time 4-6 hour, temperature 80-95 ℃, relative intensity 70-90%.
7. the preparation method of coal gangue concrete products according to claim 2, it is characterized in that coal gangue concrete is dried at empty stomach steel plate hot-die pedestal---hydrothermal curing, cooling is 3-4 hour the battery limit (BL) time, cooling rate≤20-25 ℃/hour, and member envrionment temperature≤30 ℃ after the demoulding.
CN96115369A 1996-06-11 1996-06-11 Coal gangue concrete products and preparing method thereof Expired - Fee Related CN1053647C (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101439951B (en) * 2008-12-22 2011-06-08 朝阳华龙科建股份有限公司 Digging gangue concrete
CN104591601B (en) * 2015-01-23 2016-08-17 安徽理工大学 Super poly-Coal Gangue-Concrete and preparation method thereof
CN107417181B (en) * 2017-07-13 2020-04-28 山西恒久安建筑科技有限公司 Spontaneous combustion coal gangue concrete sandwich floor slab
CN108383433B (en) * 2018-04-17 2022-02-15 上海言诺建筑材料有限公司 Composite material for 3D printing, preparation method and application thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043116A (en) * 1988-12-11 1990-06-20 广州市建筑材料工业研究所 The novel inorganic sound absorbent for building
CN1075302A (en) * 1992-02-14 1993-08-18 黑龙江大学 Produce the method for coagulant with coal gangue

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043116A (en) * 1988-12-11 1990-06-20 广州市建筑材料工业研究所 The novel inorganic sound absorbent for building
CN1075302A (en) * 1992-02-14 1993-08-18 黑龙江大学 Produce the method for coagulant with coal gangue

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
新型建筑材料1989年第5期 1989.5.20 周彦，侯兰益：煤矸石水泥及混凝土砌块的研制 *
新型建筑材料1989年第5期 1989.5.20 周彦，侯兰益：煤矸石水泥及混凝土砌块的研制;新型建筑材料1992年第6期 1992.12.22 李敏，李季等：用自燃煤矸石配制砂浆的研究 *
新型建筑材料1992年第6期 1992.12.22 李敏，李季等：用自燃煤矸石配制砂浆的研究 *

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