CN103058606A - Concrete mixed with high-volume of slag and coal ash - Google Patents
Concrete mixed with high-volume of slag and coal ash Download PDFInfo
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- CN103058606A CN103058606A CN2012105787211A CN201210578721A CN103058606A CN 103058606 A CN103058606 A CN 103058606A CN 2012105787211 A CN2012105787211 A CN 2012105787211A CN 201210578721 A CN201210578721 A CN 201210578721A CN 103058606 A CN103058606 A CN 103058606A
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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 relates to a concrete, and in particular relates to a concrete mixed with high-volume of slag and coal ash. The concrete mixed with high-volume of slag and coal ash is prepared by the following raw materials: 240kg/m3 of cement, 1200kg/m3 slag, 60kg/m3 of coal ash, 120kg/m3 of water, and a high-efficient water-reducing agent with a water-reducing rate of 40% per cubic meter of concrete. The concrete mixed with high-volume of slag and coal ash of the present invention has a thermal conductivity much smaller than other concretes, a good insulation performance, an energy-saving rate as high as 65%, high compressive strength, good load bearing effects, and an A level fire-resistance rating because all raw materials used are non-combustible materials; and has substantial difference with the other energy-saving concretes containing slag and coal ash, wherein slag and coal ash are both used as auxiliary materials and fillers for the cement in other energy-saving concretes, while slag and coal ash are used as main raw materials in the concrete mixed with high-volume of slag and coal ash of the present invention; so the concrete mixed with high-volume of slag and coal ash of the present invention is energy conservation and environment protection, and by using the concrete, cost of a building can be greatly reduced.
Description
Technical field
The present invention relates to a kind of concrete, specifically a kind of high volume slag flyash concrete.
Background technology
The tradition body of wall need at first adopt concrete segment to build bearing wall by laying bricks or stones, then pastes styrofoam in the bearing wall outside and does thermal insulation layer, and the bearing wall internal surface is done ornament layer.But there is lower column defects in traditional body of wall: one, concrete heat-insulating poor performance; Two, polyphenyl plate heat preserving poor durability, thus have influence on the weather resistance of buildings, increase the maintenance cost of buildings.
In addition, slag, flyash equal industrial residue are very large in China's output, our province (Shanxi Province) especially, and output is large but its utilization is far from.The slag that coal-fired station, factory's boiler are discharged often is regarded as refuse, not only takies the field, and throws aside and also can emit sulfurous gas atmosphere pollution and contaminate environment when piling up.If a large amount of flyash do not add processing, will produce airborne dust, atmosphere pollution enters in the water, can cause the river to silt up, and wherein harmful chemical also can work the mischief to human body and biology.Therefore, the comprehensive treating process of slag, flyash and rationally utilization are caused relevant department and experts and scholars' attention already, the Research Thinking of turning waste into wealth also becomes the research direction of building energy conservation, environmental protection.
Summary of the invention
The present invention aims to provide a kind ofly turns waste into wealth, the high volume slag flyash concrete of green, environmental protection, insulation.
The present invention is achieved by the following technical solutions: high volume slag flyash concrete, made 240 kg/m by following raw materials according
3Cement, 1200kg/m
3Slag, 60kg/m
3Flyash, 120kg/m
3Water, every cubic meter of concrete water-reducing rate is 40% high efficiency water reducing agent.
Further, kg/m
3Middle kg represents the weight of raw material, m
3Represent concrete volume.
Above-mentioned raw materials is made concrete making method, employing be conventional concrete making method.
Concrete is made the making method of concrete panel, employing be the making method of conventional concrete panel, i.e. the mixed concrete compression moulding of raw material, maintenance make concrete segment, concrete segment is built into concrete panel by laying bricks or stones.
Test: the simultaneous test of high volume pulverized slag coal ash concrete mix
1. test raw material:
1.1 cement: physicals such as the table 1 of P.O42.5 ordinary Portland cement.And this cement just as an example of test, does not limit the scope that the present invention protects, and satisfies " general purpose portland cement " cement (GB175-2007) and all can adopt.
Table 1 cement physical properties assay
1.2 slag: the physicals of slag is: loss on ignition 3.6 ﹪, silt content 2.7%, tap density 1200 kg/m
3, water ratio 8 ﹪, maximum aggregate size 10mm.And this slag just as an example of test, does not limit the scope that the present invention protects, and satisfies " light-weight aggregate and test method part 1 thereof: light-weight aggregate " slag (GBT17431.1-2010) and all can adopt.
1.3 flyash: flyash is III level flyash, and its material property is: fineness is 7.8mm, and loss on ignition is 4%, water content 5%.And this flyash just as an example of test, does not limit the scope that the present invention protects, and the flyash that satisfies " flyash that is used for cement and concrete " (GB/T 1596-2005) all can adopt.
1.4 water
Mixing water is daily tap water.And this water just as an example of test, does not limit the scope that the present invention protects, and can also adopt the water of other types.
1.5 high efficiency water reducing agent
The JHC-3 concrete early strength water-reducing agent that adopts.And this high efficiency water reducing agent just as an example of test, does not limit the scope that the present invention protects, and the water reducer that satisfies " Technical code for application of admixture in concrete " (GB 50119-2003) all can adopt.
2. the design of proportioning
2.1 determining of water consumption
According to the requirement of " design of common concrete proportioning rules " JGJ 55-2011, the concrete slump is 35～50mm, and then the water consumption of every cubic meter of concrete is calculated by following formula:
Wherein:
---the water consumption (kg/m of every cubic meter of concrete when mixing high efficiency water reducing agent
3);
The addition of high efficiency water reducing agent is determined by water-reducing rate in every cubic metre the concrete.When water-reducing rate is 40%, different types of high efficiency water reducing agent, addition is also different in the concrete, and the high efficiency water reducing agent addition is with reference to " Technical code for application of admixture in concrete " (GB 50119-2003) and " design of common concrete proportioning rules " (JGJ 55-2011).When high efficiency water reducing agent adopt be JHC-3 concrete early strength water-reducing agent the time, when water-reducing rate was 40% in every cubic meter of concrete, the addition of JHC-3 was 3 kg/m in the concrete
3
According to the requirement of " design of common concrete proportioning rules " JGJ 55-2011, the concrete slump is 35～50mm, the water consumption that needs
=200 kg/m
3, calculate as can be known according to formula (1),
2.2 determining of gelling material gross weight
According to the needs of engineering practice, concrete is guaranteeing that building intensity by laying bricks or stones meets service requirements, and when concrete strength grade reached C15, water-cement ratio got 0.4, that is:
W/B=0.4 （2）
Wherein: W---the quality (kg) of unit volume coagulation water in soil;
B---the quality of gelling material (kg) in the unit volume concrete.
According to formula (2) B=120/0.4=300 kg/m as can be known
3, in the present invention cement and flyash are gelling material.
2.3 determining of concrete density
The inventor to the research of concrete proportioning performance, through calculation and test many times, adds the needs according to engineering practice through for many years, determines that every cubic meter of concrete unit weight is that 1620kg is suitable.If every cubic meter of concrete unit weight is less than 1620kg, the poor-performings such as concrete intensity; If greater than 1620kg, preponderance has increased workman's labour intensity.Simultaneously, because minimum with respect to the add-on of other raw materials of high efficiency water reducing agent generally can be ignored it to the impact of concrete density.
Therefore, the weight m=1620-300-120=1200kg of slag in every cubic meter of concrete among the present invention.
3. test
3.1 according to the calculating of above-mentioned proportioning, the concrete of following 6 kinds of proportionings is as test raw material in the table 2.
6 kinds high volume pulverized slag coal ash of table 2 concrete mix (kg/m
3)
| The proportioning numbering | Cement | Slag | Flyash | Water | High efficiency water reducing agent |
| 1 | 180 | 1200 | 120 | 120 | 3.00 |
| 2 | 200 | 1200 | 100 | 120 | 3.00 |
| 3 | 220 | 1200 | 80 | 120 | 3.00 |
| 4 | 240 | 1200 | 60 | 120 | 3.00 |
| 5 | 260 | 1200 | 40 | 120 | 3.00 |
| 6 | 280 | 1200 | 20 | 120 | 3.00 |
3.2 adopt conventional concrete making method, be 390mm * 190mm * 190mm concrete segment according to 6 kinds of proportioning manufactured sizes in 3.1, every kind of proportioning is got 3, tests actual concrete segment unit weight, and test result sees Table 3.
The high volume slag coal ash concrete blocks unit weight test-results of table 3 different mixture ratio
Have error between the actual unit weight of concrete segment and the concrete density in the table 3, this error is because raw material is made in the during Concrete, the impact that cement and water hydratable reaction cause; Or in the concrete segment maintenance processes, the concrete segment suction causes.
3.3 be 100mm * 100mm * 100mm concrete segment according to 6 kinds of mix proportion manufactured sizes in 3.1, every kind of proportioning is randomly drawed 5 building blocks and is carried out the freeze thawing strength trial, randomly draw 5 building blocks and carry out the freeze thawing quality test, freezing and thawing test is with reference to " lightweight small size hollow concrete blocks touchstone " GB/T15229-2002 and " Test methods for the small concrete hollow block " GB/T4111-1997, and test-results sees Table 4.
The high volume slag coal ash concrete blocks freezing and thawing test result of table 4 different mixture ratio
Test-results: by freezing and thawing test, the concrete segment loss of strength rate of 6 kinds of proportionings satisfies the requirement of " lightweight small size hollow concrete blocks touchstone " GB/T 15229-2002 all less than 25%.Simultaneously, the concrete segment mass loss rate under 6 kinds of proportionings satisfies the requirement of " lightweight small size hollow concrete blocks touchstone " GB/T 15229-2002 all less than 5 %.
3.4 be 390mm * 190mm * 190mm concrete segment according to 6 kinds of proportioning manufactured sizes in 3.1, maintenance 28 days, every kind of proportioning is randomly drawed 5 building blocks, adopts pressure testing machine each building block to be carried out mensuration, measurement result such as the following table 5 of ultimate compression strength.
The measurement result of the ultimate compression strength of the high volume slag coal ash concrete blocks of table 5 different mixture ratio
Composite score: according to table 4 test-results, the equal conformance with standard of concrete segment freezing and thawing test of 6 kinds of proportionings.But concrete segment commonly used requires high-strength light weight (ultimate compression strength high, quality little), and the building block grade is MU10, namely requires ultimate compression strength more than or equal to 10MPa.According to table 5 test-results, the concrete segment ultimate compression strength that is numbered 1～3 proportioning is respectively 12.5 MPa, 13.6 MPa, 14.7 MPa, although all greater than 10MPa, but consider the loss of strength that causes owing to building block production process, building block application and construction process when preparing a large amount of building block in the engineering application, the block strength fraction of these three kinds of proportionings preparations is lower.The concrete segment ultimate compression strength that is numbered 5,6 proportioning is 17.4 MPa, 19.4MPa, although that intensity much larger than 10MPa, is numbered in 5,6 the proportioning cement consumption is large, economical not.Therefore, think that it is suitable that numbering 4 proportioning is applied as the concrete actual proportioning of high volume pulverized slag coal ash.
3.5 thermal conductivity test
Be of a size of 390mm * 190mm * 190mm concrete segment with the concrete for making of numbering 4 proportioning, maintenance 28 days, oven dry uses JTRG-II building thermal technique temperature hot-fluid Auto-Test System to its mensuration of carrying out heat transfer coefficient, and measurement result sees Table 6.
The determination data of the high volume slag of table 6 coal ash concrete blocks heat transfer coefficient
Get the mean value 1.566W/ ㎡ K of heat transfer coefficient in the test duration, according to the thermal conductivity formula, thermal conductivity=heat transfer coefficient * thickness, thermal conductivity=1.566 * 0.19=0.298W/mK.
3.6 the contrast of the thermal conductivity of concrete of the present invention and general concrete, common building block sees Table 7.
The contrast of table 7 thermal conductivity
4. conclusion (of pressure testing)
Pass through contrast, consider from intensity and economy two aspects, in descending in advance of engineering demands, select proportioning to be numbered the high volume slag coal ash concrete blocks of 4 proportioning preparation, its thermal conductivity is less than 0.3W/mK, and intensity is greater than 10MPa, and unit weight is about 1700kg/m
3, loss of strength 5.99% before and after the freeze thawing, the loss of strength rate is less than 25%, and the freezing-thawing strength damage leads less than 25%, and mass loss rate satisfies the requirement of " lightweight small size hollow concrete blocks touchstone " GB/T 15229-2002 less than 5%.
The concrete beneficial effect of high volume pulverized slag coal ash of the present invention is as follows:
(1) the concrete thermal conductivity is much smaller than other concrete, and heat-insulating property is good, and fractional energy savings reaches 65%, and ultimate compression strength is high, and load bearing effect is good, and the raw material of employing is non-fire material, and fire-protection rating reaches the A level;
(2) tangible different from other energy-conservation concrete tools that contain slag, flyash, slag in other energy-conservation concrete, flyash all are auxiliary material, the fillers as cement, but slag, flyash are as body material in the high volume pulverized slag coal ash concrete material of the present invention, especially a large amount of employings slag, the slag consumption is 5 times of cement, carried out reasonable utilization for industrial residue slag, flyash, energy-conserving and environment-protective, the cost of buildings reduces greatly.
Embodiment
Embodiment 1
High volume slag flyash concrete is made 240 kg/m by following raw materials according
3P.O42.5 ordinary Portland cement, 1200kg/m
3Slag, 60kg/m
3III level flyash, 120kg/m
3Water, 3kg/m
3JHC-3 concrete early strength water-reducing agent.The physicals of cement sees Table 1; The physicals of slag is loss on ignition 3.6 ﹪, silt content 2.7%, tap density 1200 kg/m
3, water ratio 8 ﹪, maximum aggregate size 10mm.
Above-mentioned cement satisfies " general purpose portland cement " requirement (GB175-2007); Above-mentioned slag satisfies " light-weight aggregate and test method part 1 thereof: light-weight aggregate " requirement (GBT17431.1-2010), above-mentioned flyash satisfies the requirement of " flyash that is used for cement and concrete " (GB/T 1596-2005), and above-mentioned high efficiency water reducing agent satisfies the requirement of " Technical code for application of admixture in concrete " (GB 50119-2003).
Further, described concrete adopts conventional means to make wallboard, and described concrete panel internal surface is bonded with plasterboard by kervit microbead insulated sand slurry, makes combined wall.Described combined wall has the effect of load-bearing, insulation and internal and external ornament, has good globality.The plasterboard of decorating as internal layer has saved the link of inside fitting, has reduced operational procedure, has reduced cost.During concrete the making, can according to architectural design and construction requirement, combined wall be made into the exterior wall product of arbitrary shape, size.
Embodiment 2
High volume slag flyash concrete is made 240 kg/m by following raw materials according
3The P.S.A42.5 Portland blastfurnaceslag cement, 1200kg/m
3Slag, 60kg/m
3I level flyash, 120kg/m
3Water, 4kg/m
3The FK early strength water-reducing agent; The physicals of slag is loss on ignition 4.1 ﹪, silt content 2.4%, tap density 1100 kg/m
3, water ratio 10 ﹪, maximum aggregate size 12mm.
Above-mentioned cement satisfies " general purpose portland cement " requirement (GB175-2007); Above-mentioned slag satisfies " light-weight aggregate and test method part 1 thereof: light-weight aggregate " requirement (GBT17431.1-2010), above-mentioned flyash satisfies the requirement of " flyash that is used for cement and concrete " (GB/T 1596-2005), and above-mentioned high efficiency water reducing agent satisfies the requirement of " Technical code for application of admixture in concrete " (GB 50119-2003).
Embodiment 3
High volume slag flyash concrete is made 240 kg/m by following raw materials according
3P.F42.5 Portland fly ash cement, 1200kg/m
3Slag, 60kg/m
3II level flyash, 120kg/m
3Water, 3.5kg/m
3The HSN early strength water-reducing agent; The physicals of slag is loss on ignition 4.7 ﹪, silt content 2.5%, tap density 1138 kg/m
3, water ratio 7.6 ﹪, maximum aggregate size 9mm.
Above-mentioned cement satisfies " general purpose portland cement " requirement (GB175-2007); Above-mentioned slag satisfies " light-weight aggregate and test method part 1 thereof: light-weight aggregate " requirement (GBT17431.1-2010), above-mentioned flyash satisfies the requirement of " flyash that is used for cement and concrete " (GB/T 1596-2005), and above-mentioned high efficiency water reducing agent satisfies the requirement of " Technical code for application of admixture in concrete " (GB 50119-2003).
Claims (2)
1. high volume slag flyash concrete is characterized in that, is made 240 kg/m by following raw materials according
3Cement, 1200kg/m
3Slag, 60kg/m
3Flyash, 120kg/m
3Water, every cubic meter of concrete water-reducing rate is 40% high efficiency water reducing agent.
2. high volume pulverized slag coal ash concrete panel according to claim 1 is characterized in that described concrete panel internal surface is bonded with plasterboard by kervit microbead insulated sand slurry, makes combined wall.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103664094A (en) * | 2013-11-14 | 2014-03-26 | 河南兴安新型建筑材料有限公司 | Light-weight aggregate concrete and preparation method thereof |
| CN108774019A (en) * | 2018-06-21 | 2018-11-09 | 中国建筑土木建设有限公司 | The preparation method of the concrete of concrete and reduction gel material content |
| CN111763045A (en) * | 2020-05-18 | 2020-10-13 | 宁夏乐丰资源科技有限公司 | Slag pervious concrete and preparation and use methods thereof |
| CN113277805A (en) * | 2021-05-28 | 2021-08-20 | 贵州盘江煤电集团有限责任公司 | High-strength mixed guniting material based on high-content fly ash and application method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483696A (en) * | 2003-07-18 | 2004-03-24 | 上海成高科技有限公司 | Optimization integration for high composition, high strength and light flyash small hollow building block |
| CN102173624A (en) * | 2011-03-03 | 2011-09-07 | 肖利 | Expansion verified micro ball modified colorful master batch, preparation method and application thereof |
-
2012
- 2012-12-28 CN CN2012105787211A patent/CN103058606A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483696A (en) * | 2003-07-18 | 2004-03-24 | 上海成高科技有限公司 | Optimization integration for high composition, high strength and light flyash small hollow building block |
| CN102173624A (en) * | 2011-03-03 | 2011-09-07 | 肖利 | Expansion verified micro ball modified colorful master batch, preparation method and application thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103664094A (en) * | 2013-11-14 | 2014-03-26 | 河南兴安新型建筑材料有限公司 | Light-weight aggregate concrete and preparation method thereof |
| CN103664094B (en) * | 2013-11-14 | 2015-10-28 | 河南兴安新型建筑材料有限公司 | A kind of lightweight aggregate concrete and preparation method thereof |
| CN108774019A (en) * | 2018-06-21 | 2018-11-09 | 中国建筑土木建设有限公司 | The preparation method of the concrete of concrete and reduction gel material content |
| CN108774019B (en) * | 2018-06-21 | 2021-06-11 | 中国建筑土木建设有限公司 | Concrete and preparation method of concrete capable of reducing consumption of cementing material |
| CN111763045A (en) * | 2020-05-18 | 2020-10-13 | 宁夏乐丰资源科技有限公司 | Slag pervious concrete and preparation and use methods thereof |
| CN113277805A (en) * | 2021-05-28 | 2021-08-20 | 贵州盘江煤电集团有限责任公司 | High-strength mixed guniting material based on high-content fly ash and application method thereof |
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Application publication date: 20130424 |