CN86106928A - Non-calcined fine coal powder aggregate and preparation method thereof - Google Patents
Non-calcined fine coal powder aggregate and preparation method thereof Download PDFInfo
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- CN86106928A CN86106928A CN86106928.5A CN86106928A CN86106928A CN 86106928 A CN86106928 A CN 86106928A CN 86106928 A CN86106928 A CN 86106928A CN 86106928 A CN86106928 A CN 86106928A
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- flyash
- fly ash
- ash cement
- cement clinker
- light
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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
Non-calcined fine coal powder aggregate and preparation method thereof, it is characterized in that with the aluminosilicate fly ash cement clinker being exciting agent, the composition of light skeletal (weight %) is: 82～92 flyash, 8～14 aluminosilicate fly ash cement clinkers, 1～4 dihydrate gypsum, three kinds of materials enter the ball mill fine grinding simultaneously, add the water balling-up after, pellet maintenance under natural temperature.The present invention contains flyash and reaches 95%, and technology is simple, and save energy reduces cost, product cylindrical compress strength height, and unit weight is light, particularly suitable body of wall and high level and large span architecture.
Description
The invention relates to a kind of non-calcined fine coal powder aggregate that is used for light concrete.More particularly, the present invention relates to building assembled, cast-in-place industry and covil construction, and other structures, be specially adapted to body of wall, high level and large span architecture structure.
The manufacturing of flyash artificial aggregate, in the world from calcining process develop into vapor cure or outside doping, make its air-set.China's fourth phase in 1981 " building materials collected translation " has reprinted on the 19th～20 page of Soviet Union's " material of construction " 1980 the 8th phase and has disclosed a kind of not calcined fine coal powder cobble, mix with 85% flyash and 15% above portland cement, add the water balling-up, after wet heat treatment, become artificial aggregate, or mix admixture, accelerate air-set speed, adopt this kind technology, the production cost height, because portland cement is made exciting agent, the activity of flyash can not get fully playing, and the cylindrical compress strength of aggregate has only 5.0～6.0 MPas.Simultaneously the CaO amount that contains in the flyash is had strict requirement, CaO content is about 20%, thereby utilization of coal ash is restricted.It is the flyash artificial aggregate of exciting agent with lime that Japanese Patent, special permission disclose that clear 60-221351 disclosed, and is made of steam curing under normal pressure after the balling-up flyash, lime and gypsum proportioning; Japanese Patent, special permission disclose clear 58-19251 and has disclosed by 80% flyash, 20% portland cement and form, and adds an amount of admixture, and the non-calcined fine coal powder artificial aggregate is made in the mixing balling-up.Above-mentioned two kinds of methods, complex process, the activity of flyash also is not in full use, and the intensity of aggregate is not high yet.United States Patent (USP) 4336069 has disclosed with 1 part of portland cement and 1～15 part of artificial aggregate that flyash is mixed and made into, and best ratio is 1: 1.5～2.2.The flyash optimum content is 60～70% in this kind aggregate, and the CaO amount that contains in the flyash requires to reach 16.8～29.6%, and the flyash low to calcium oxide content just can not utilize.
The objective of the invention is to make full use of flyash, it is exciting agent that a kind of silico-aluminate cement clinker that contains flyash is provided, and this kind exciting agent has stronger excitation to the flyash in the aggregate, to increase the intensity of aggregate.Concrete light, intensity height with this aggregate preparation.
Another object of the present invention is to provide a kind of method of the condition maintenance aggregate at natural temperature, technology is simple, and save energy reduces cost.
The invention is characterized in the aluminosilicate fly ash cement clinker to be exciting agent, the composition of non-calcined fine coal powder aggregate (weight %) is:
8～14 aluminosilicate fly ash cement clinkers,
82～92 flyash,
1～4 dihydrate gypsum.
Light skeletal of the present invention, because adopting aluminosilicate fly ash cement clinker is exciting agent, the activity of flyash there is the intensive excitation, can make full use of flyash, make its content in light skeletal can reach 95%, and calcium oxide content in the flyash is not had particular requirement.
Exciting agent of the present invention is characterized in that containing aluminosilicate fly ash cement clinker, and its raw material are formed (weight %) and are:
18～25 flyash,
70～80 Wingdales;
2～6 dihydrate gypsums
1～3% fluorite exosmoses.Through 1300～1400 ℃ of calcinings.Grog system is with C
3S, C
2S, C
4A
3S and C
11A
7CaF
2Form Deng essential mineral, the activity of flyash is had stronger excitation.With the light skeletal that this kind grog is formed, intensity height, and extension (about 5 months) that can be in time and increase its intensity gradually.
Making method of the present invention comprises batching, grinding, balling-up, maintenance, it is characterized in that feeding ball mill simultaneously after flyash, aluminosilicate fly ash cement clinker and the dihydrate gypsum metering, mix levigately, the pellet after the balling-up carries out maintenance under natural temperature.
Batching: dihydrate gypsum, grog are broken in advance, and flyash, grog, dihydrate gypsum measure respectively and feed ball mill simultaneously then.
Grind: above-mentioned three kinds of starting material mix in ball mill, stir, grind equably, increase the specific surface area of mixture particle, improve the excitation of grog to flyash, (0.080 millimeter square hole sieve screen over-size is preferably 3.5～6% below 8% to the fineness of compound.
Balling-up: the particle grain size to pellet should be in 5～20m/m.Grain composition requires: 5m/m accumulative total screen over-size is greater than 90%, and 20m/m accumulative total screen over-size is less than 10%.The quality of balling-up is to grasp amount of water, feed rate, pan-pelletizer angle, this for moulding after the intensity of pellet, especially make the initial intensity of pellet, so that can bear conveying backward, impact in the stacking process, friction and extruding and can keep its profile shaped, intact be crucial, be 23.0～27.5% through the test amount of water.45 °～60 ° of pan-pelletizer angles.
Maintenance: the present invention does not need calcining or steam curing, does not need to add any additives yet, becomes aggregate but in the condition of natural temperature pellet is carried out maintenance.Nature temperature should be in 0+5～30 ℃ carries out maintenance, and under this different curing temperature, temperature is high more, and the cylindrical compress strength of light skeletal increases fast more; On the contrary, maintenance at low temperatures, the strength development of light skeletal is slow, and through test, curing temperature is at 20 ℃, and cylindrical compress strength can reach 60kg/cm in 14 days
2,, can reach 60kg/cm in 45 days as about 5 ℃
2, light skeletal dispatches from the factory the cylindrical compress strength requirement greater than 25kg/cm
2, in the maintenance processes, can not be in dry environment, or under the intensive sun, be exposed to the sun, in order to avoid the inner formation that early stage dehydration occurs, hinder the inner hydrated product of pellet of pellet.Produce in the winter time, need to increase lagging facility or prolong curing time.
The light skeletal salient features that the present invention makes is as follows:
Non-calcined fine coal powder aggregate salient features table
The light concrete salient features of light skeletal preparation of the present invention is as follows:
Light concrete salient features table
The present invention is above-mentioned to be shown, can prepare multi-purpose light weight concrete, is suitable for building assembling or cast-in-place industry and covil construction.Be specially adapted to body of wall and high level and large span architecture.Because physical strength height, unit weight are light, and be lighter by about 1/4th than normal concrete, transportation in the construction, lifting are convenient in the deadweight that can alleviate building structure and member, improve the buildings functions of use, and economical with materials consumption again reduces the construction work total cost simultaneously.In addition, also can strengthen the shock resistance of buildings.
The flyash that contains among the present invention reaches 95%, has not only saved to aim at the huge investment of handling industrial residue flyash, saves and stacks the place, can protect environment again, reduces and pollutes, and turns waste into wealth, and can produce good society and economic benefit.
Natural curing of the present invention need not calcined, save energy, and production technique is simple, and cost is low, 18～20 yuan of every cubic metre of Renminbi.
Following examples further specify enforcement of the present invention, are illustrated in conjunction with suitable embodiment especially, and these embodiment only in order to explain invention, can not think limitation of the present invention.
Embodiment 1
Flyash 87.0%, aluminosilicate fly ash cement clinker 11.5%, dihydrate gypsum 1.5%, dihydrate gypsum, grog are earlier in 400 * 600m/m crusher in crushing, and metering feeds φ 1.2 * 4.5m ball mill mixing fine grinding simultaneously respectively then, the compound fineness is 5.1%, during balling-up, adopt φ 2.2m nodulizer, 60 ° of amount of water 25.0% of gradient, grain diameter carries out maintenance 20～22 ℃ of natural temperature and becomes light skeletal in 5～20m/m.Cylindrical compress strength 7 days was 3.0 MPas, and 28 days is 6.0～8.5 MPas, loose capacity (thousand) 650～800kg/m
3; Hour water-intake rate: the over dry state is below 30%, and state of nature is below 12%; Coefficient of softening greater than under the 0.75(state of nature greater than 0.85); Antifreezing test: weight loss is less than 4%; Cylindrical compress strength reduction value is in 15%; Cylindrical compress strength reduction value is less than 20% after the carbonization; Cyclic wetting and drying test: cylindrical compress strength and weight loss are all less than 4%; Loss on ignition is not more than 17%, and silt content is less than 2%.
Embodiment 2
The condition of implementing is with embodiment 1,89.0% flyash, 9.0% aluminosilicate fly ash cement clinker and 2.0% dihydrate gypsum, amount of water is 26.5% during 6.5% balling-up of compound fineness, maintenance under 30 ℃ of natural temperature, 7 days 3.9 MPas of the cylindrical compress strength of light skeletal, 14 days 6.4 MPas, 28 days 8.5 MPas, other performances are with embodiment 1.
Embodiment 3
The condition of implementing is with embodiment 1,83.5% flyash, 14.0% aluminosilicate fly ash cement clinker, 2.5% dihydrate gypsum, compound fineness 6.0%, balling-up amount of water 23.5%, the temperature of natural curing is at 8 ℃, 14 days 3.0 MPas of the cylindrical compress strength of light skeletal, 28 days 5.7 MPas, other performances are also with embodiment 1.
Claims (6)
1, a kind of non-calcined fine coal powder aggregate that is used for light concrete is characterized in that with the aluminosilicate fly ash cement clinker being exciting agent, and the composition of light skeletal (weight %) is:
82～92 flyash
8～14 aluminosilicate fly ash cement clinkers
1～4 dihydrate gypsum
2, light skeletal according to claim 1 is characterized in that the raw material compositions (weight %) of aluminosilicate fly ash cement clinker are:
18～25 flyash
70～80 Wingdales
2～6 dihydrate gypsums
1～3% fluorite exosmoses.
3, according to claim 1,2 described light skeletals, it is characterized in that 1300～1400 ℃ of aluminosilicate fly ash cement clinker incinerating temperature.
4, a kind of making method of non-calcined fine coal powder aggregate, comprise steps such as batching, grinding, balling-up, maintenance, it is characterized in that feeding ball mill simultaneously after flyash, aluminosilicate fly ash cement clinker, the dihydrate gypsum metering, mix fine grinding, the pellet after the balling-up carries out maintenance under natural temperature.
5, method according to claim 4 is characterized in that the fineness (0.080 millimeter square hole sieve screen over-size) of compound below 8%, is preferably 3.5～6%, and the balling-up amount of water is 23.0～27.5%.
6, method according to claim 4, its feature in the temperature of natural temperature maintenance in 0+5～30 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86106928.5A CN1004482B (en) | 1986-10-09 | 1986-10-09 | Production method of non-calcined fine coal powder aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86106928.5A CN1004482B (en) | 1986-10-09 | 1986-10-09 | Production method of non-calcined fine coal powder aggregate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86106928A true CN86106928A (en) | 1988-01-13 |
| CN1004482B CN1004482B (en) | 1989-06-14 |
Family
ID=4803417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86106928.5A Expired CN1004482B (en) | 1986-10-09 | 1986-10-09 | Production method of non-calcined fine coal powder aggregate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004482B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065217C (en) * | 1995-01-09 | 2001-05-02 | 三菱化学株式会社 | Method for producing coal ash particle |
| CN102092994A (en) * | 2010-11-25 | 2011-06-15 | 大连恒翔粉煤灰综合利用有限公司 | Fly ash sintering-free ceramsite |
| CN105777024A (en) * | 2016-01-22 | 2016-07-20 | 北京融达建业建筑工程技术有限公司 | Oil and gas field environment-friendly fracturing propping agent and preparation method thereof |
| CN108033731A (en) * | 2017-12-29 | 2018-05-15 | 成都精准混凝土有限公司 | Decorate granolithic concrete and its preparation process |
| CN108101467A (en) * | 2017-11-14 | 2018-06-01 | 深圳大学 | A kind of unburned lightweight aggregate of building castoff clay brick and preparation method thereof |
| CN112745071A (en) * | 2020-12-30 | 2021-05-04 | 陕西正元环保科技产业(集团)有限公司 | Preparation method of high-content high-strength fly ash unfired ceramsite |
| CN113060983A (en) * | 2021-05-20 | 2021-07-02 | 太原钢铁(集团)有限公司 | Preparation method of large-volume fly ash unfired lightweight aggregate |
-
1986
- 1986-10-09 CN CN86106928.5A patent/CN1004482B/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065217C (en) * | 1995-01-09 | 2001-05-02 | 三菱化学株式会社 | Method for producing coal ash particle |
| CN102092994A (en) * | 2010-11-25 | 2011-06-15 | 大连恒翔粉煤灰综合利用有限公司 | Fly ash sintering-free ceramsite |
| CN105777024A (en) * | 2016-01-22 | 2016-07-20 | 北京融达建业建筑工程技术有限公司 | Oil and gas field environment-friendly fracturing propping agent and preparation method thereof |
| CN105777024B (en) * | 2016-01-22 | 2018-01-09 | 北京融达建业建筑工程技术有限公司 | A kind of oil gas field environmental protection fracturing propping agents and preparation method |
| CN108101467A (en) * | 2017-11-14 | 2018-06-01 | 深圳大学 | A kind of unburned lightweight aggregate of building castoff clay brick and preparation method thereof |
| CN108033731A (en) * | 2017-12-29 | 2018-05-15 | 成都精准混凝土有限公司 | Decorate granolithic concrete and its preparation process |
| CN112745071A (en) * | 2020-12-30 | 2021-05-04 | 陕西正元环保科技产业(集团)有限公司 | Preparation method of high-content high-strength fly ash unfired ceramsite |
| CN113060983A (en) * | 2021-05-20 | 2021-07-02 | 太原钢铁(集团)有限公司 | Preparation method of large-volume fly ash unfired lightweight aggregate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1004482B (en) | 1989-06-14 |
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