CN103641412A - Steel slag aggregate foam concrete - Google Patents
Steel slag aggregate foam concrete Download PDFInfo
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- CN103641412A CN103641412A CN201310657775.1A CN201310657775A CN103641412A CN 103641412 A CN103641412 A CN 103641412A CN 201310657775 A CN201310657775 A CN 201310657775A CN 103641412 A CN103641412 A CN 103641412A
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- Prior art keywords
- slag
- aggregate
- concrete
- cement
- foamed concrete
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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
Abstract
The invention discloses steel slag aggregate foam concrete, and belongs to the technical field of concrete. The concrete consists of the following components in percentage by mass: 20-40% of cement, 50-70% of steel slag fine aggregate, 10-20% of water and 1.0-1.8kg/m<3> of a foaming agent. The steel slag aggregate foam concrete can reduce appearance density and heat conductivity coefficient of the concrete through the foaming agent; the prepared concrete has excellent thermal performance, namely excellent heat preserving and insulating performance, thereby being a relatively ideal self-heat preserving material.
Description
Technical field
The technical field of the invention is concrete technology field, being specifically related to a kind of slag mine tailing replacement cement concrete that utilizes gathers materials, and by adding whipping agent to reduce concrete apparent density, thermal conductivity, improve the slag as aggregate foamed concrete of concrete heat-insulating performance.
Background technology
The steel scrap scum producing in ferrous metallurgy process (comprising blast-furnace slag and slag) is about 40% of output of steel, is the main byproduct of ferrous metallurgical industry.Application at China's blast-furnace slag is very extensive, and has put into effect the GBFS > > (GB/T18046-2000) of national standard < < for cement and concrete; And for the slag in steelmaking process, related specifications does not instruct it to be used as concrete aggregate.Slag is the inevitable by product in steelmaking process, and its output is about 15%～20% of crude steel output, occupies larger specific gravity in industrial residue.At present the annual slag output of China is nearly 100,000,000 tons, and accumulate for many years the slag that does not add utilization, has more than 300,000,000 ton, and these slag contaminate environment, occupy soil, not only cause the wasting of resources but also destroy ecotope, and present situation can not be ignored.
China's slag approximately only has 10% in the utilization ratio of building materials field at present, wherein only have small portion for the production of steel slag cement, and major part is mainly used in building the road and backfill, belongs to the low value-added pattern of utilizing.The hardness of slag is conventionally higher, and grindability is poor, as cement component or carry out when levigate as active admixture must lot of energy, is not rational recycling mode equally.If the slag of appropriate particle size is used as to the preparation foamed concrete that gathers materials, can strengthen Comprehensive Utilization of Steel Slag dynamics first, while second not needing to resemble for the production of steel slag cement, steel slag particle is not carried out to levigate processing, energy consumption when this greatly reduces steel slag utilization and the wasting of resources are obviously the Rational Utilization Models that a kind of consumption is large, energy consumption is low, added value is higher.This shows this for we study the research of slag in concrete and application created may, can realize energy-conservation this target simultaneously.
Current common industry and covil construction mainly contain following several structure formation: brick mix structure, skeleton construction, shear wall structure and bent structure.Traditional brick mix structure is owing to being used clay brick, and a large amount of waste land resources, is difficult to meet the requirement of society to building structure energy-conservation 50% on the other hand on the one hand, even if reach this requirement, the thickness of its body of wall also will be multiplied.Although the filled wall of skeleton construction can be used small concrete block and structural clay tile, but due to little building block, self be difficult to meet energy-conservation 50% requirement and needs and take in addition Insulation, its gap cannot completely dissolve as onsite concrete simultaneously, so also can cause the waste of the energy.The conventional heat preserving mode of buildings has outer insulation and two kinds of forms of interior insulation now, but research shows: heat bridge easily appears in interior insulation, and easily when house decoration, is destroyed; Although outer insulation can avoid producing heat bridge, room temperature, stablize and can protect concrete, owing to directly exposing to sunlight, easily causing the aging of lagging material and finally lose heat-insulating property.The mode that has occurred in recent years " self-heat conserving ", compare with other heat preserving modes, self heat insulation wall can be eliminated heat bridge effectively, give full play to lagging material heat-insulating property, construction is simple simultaneously, construction cost is low, and its work-ing life, (weathering resistance) was consistent with buildings, has the incomparable advantage of other heat-preserving wall.
Because hardness is high, grindability is poor, slag is as cement component or must lot of energy when the active admixture, and existing steel slag utilization pattern does not also meet the present stage requirement that utilizes of Resource Rationalization.Therefore carry out the research of slag foamed concrete, meet heat preservation energy-saving material of construction development trend, the building thermal insulation material new for exploitation has important Research Significance and promotional value with large consumption, the low energy consumption comprehensive utilization of promotion slag.
Summary of the invention
The problem existing for prior art, the technical scheme that the present invention takes is:
A slag as aggregate foamed concrete, described concrete is comprised of cement, slag thin aggregate, water, whipping agent, and the mass percent of each component is: cement 20%-40%, slag thin aggregate 50%-70%, water 10%-20%, foaming agent consumption is 1.0-1.8kg/m
3.
Described each constituent mass per-cent is preferably cement 25%-30%, slag thin aggregate 55%-60%, and water 12%-15%, foaming agent consumption is 1.2-1.5kg/m
3.
In described slag thin aggregate, slag quality accounts for 50-100%, and chiltern amount accounts for 0-50%.
Described slag is that particle diameter is 0.15-4.75mm.
Described cement is that grade is not higher than 42.5 general purpose portland cement.
Described whipping agent is synthetic class whipping agent, protein-active thing type whipping agent or composite water cement foaming agent.
Compared with prior art, its beneficial effect is in the present invention:
(1) foamed concrete is due to the tiny hole that contains a large amount of sealings, so have good thermal property, good thermal and insulating performance, is a kind of comparatively desirable self-thermal insulation material.Conventionally density rating is at 300-1200 kg/m
3the foamed concrete of scope, thermal conductivity is between 0.08-0.30w/ (mK).
(2) slag is used as to concrete aggregate, can relatively realizes large consumption, the less energy-consumption application of slag in building trade, have broad prospects; Utilize appropriate particle size slag mine tailing to replace part of cement concrete aggregate, and by adding whipping agent to reduce concrete apparent density, thermal conductivity, when realizing slag high value added utilization, can make the concrete material with good thermal insulation property.
(3) foamed concrete is as building masonry wall and roofing heat insulating material, there is easily performance of heat insulation effect, easy construction, cost is low and with buildings with clear superiorities such as life-spans.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
embodiment 1
A kind of slag as aggregate foamed concrete, described concrete is comprised of the ordinary Portland cement of grade 32.5, slag, sand, water, the synthetic class whipping agent that particle diameter is 0.15-4.75mm, the mass percent of each component is: cement 20%, slag 35%, sand 35%, water 10%, foaming agent consumption is 1.0kg/m
3.
During preparation, first slag is directly sieved, the slag of particle diameter 0.15-4.75mm and sand are used for serving as concrete aggregate, according to the ratio of above-mentioned each component, feed intake, and adopt first dry rear wet method mixing concrete formation.
The density of the slag foamed concrete making is 862kg/m
3, 60d volumetric shrinkage is deformed into 200 * 10
-6, thermal conductivity is 0.22W/ (mK).
embodiment 2
A kind of slag as aggregate foamed concrete, the slag that described concrete is 0.15-4.75mm by grade 32.5R ordinary Portland cement, particle diameter, water, protein-active thing type whipping agent form, and the mass percent of each component is: cement 30%, slag 55%, water 15%, foaming agent consumption is 1.5kg/m
3.
During preparation, first slag is directly sieved, the slag of particle diameter 0.15-4.75mm is used for serving as concrete aggregate, according to the ratio of above-mentioned each component, feeds intake, and adopts first dry rear wet method mixing concrete formation.
The density of the slag foamed concrete making is 1092kg/m
3, 60d cubic deformation is 250 * 10
-6, thermal conductivity is 0.28 W/ (mK).
embodiment 3
A kind of slag as aggregate foamed concrete, described concrete is comprised of the Portland blast furnace slag cement of class 4 2.5, slag, sand, water, the composite water cement foaming agent that particle diameter is 0.15-4.75mm, the mass percent of each component is: cement 20%, slag 40%, sand 20%, water 20%, foaming agent consumption is 1.8kg/m
3.
During preparation, first slag is directly sieved, the slag of particle diameter 0.15-4.75mm and sand are used for serving as concrete aggregate, according to the ratio of above-mentioned each component, feed intake, and adopt first dry rear wet method mixing concrete formation.
The density of the slag foamed concrete making is less than 635kg/m
3, 60d cubic deformation is 220 * 10
-6within, thermal conductivity is 0.15 W/ (mK).
Claims (6)
1. a slag as aggregate foamed concrete, is characterized in that, described concrete is comprised of cement, slag thin aggregate, water, whipping agent, the mass percent of each component is: cement 20%-40%, slag thin aggregate 50%-70%, water 10%-20%, foaming agent consumption is 1.0-1.8kg/m
3.
2. slag as aggregate foamed concrete according to claim 1, is characterized in that, described each constituent mass per-cent is preferably cement 25%-30%, slag thin aggregate 55%-60%, and water 12%-15%, foaming agent consumption is 1.2-1.5kg/m
3.
3. slag as aggregate foamed concrete according to claim 1 and 2, is characterized in that, in described slag thin aggregate, slag quality accounts for 50-100%, and chiltern amount accounts for 0-50%.
4. slag as aggregate foamed concrete according to claim 3, is characterized in that, described slag is that particle diameter is 0.15-4.75mm.
5. slag as aggregate foamed concrete according to claim 1, is characterized in that, described cement is that grade is not higher than 42.5 general purpose portland cement.
6. slag as aggregate foamed concrete according to claim 1, is characterized in that, described whipping agent is synthetic class whipping agent, protein-active thing type whipping agent or composite water cement foaming agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310657775.1A CN103641412A (en) | 2013-12-09 | 2013-12-09 | Steel slag aggregate foam concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310657775.1A CN103641412A (en) | 2013-12-09 | 2013-12-09 | Steel slag aggregate foam concrete |
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| Publication Number | Publication Date |
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| CN103641412A true CN103641412A (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310657775.1A Pending CN103641412A (en) | 2013-12-09 | 2013-12-09 | Steel slag aggregate foam concrete |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106892624A (en) * | 2017-03-29 | 2017-06-27 | 河北建筑工程学院 | A kind of iron tailings foam concrete and prefabricated steel framework wallboard and its construction method |
| CN109721302A (en) * | 2018-12-27 | 2019-05-07 | 上海星欣科技发展有限公司 | A kind of sharp give up cast-in-place foamed concrete composition and its preparation and application |
| CN111362634A (en) * | 2020-05-06 | 2020-07-03 | 江苏启坤循环经济产业技术开发有限公司 | Method for preparing concrete by using industrial waste slag and steel slag to replace natural sand |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1891655A (en) * | 2005-07-04 | 2007-01-10 | 上海宝钢冶金建设公司 | GRC product made of using slag as aggregate |
| CN101139194A (en) * | 2007-08-16 | 2008-03-12 | 李积平 | Method for preparing foaming concrete lightweight wall material |
| CN101215135A (en) * | 2007-01-05 | 2008-07-09 | 上海宝钢冶金技术服务有限公司 | Steel slag wall building blocks and manufacturing method thereof |
| CN103011723A (en) * | 2012-12-12 | 2013-04-03 | 首钢总公司 | Heavily-doped steel slag foam concrete building block and preparation method thereof |
-
2013
- 2013-12-09 CN CN201310657775.1A patent/CN103641412A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1891655A (en) * | 2005-07-04 | 2007-01-10 | 上海宝钢冶金建设公司 | GRC product made of using slag as aggregate |
| CN101215135A (en) * | 2007-01-05 | 2008-07-09 | 上海宝钢冶金技术服务有限公司 | Steel slag wall building blocks and manufacturing method thereof |
| CN101139194A (en) * | 2007-08-16 | 2008-03-12 | 李积平 | Method for preparing foaming concrete lightweight wall material |
| CN103011723A (en) * | 2012-12-12 | 2013-04-03 | 首钢总公司 | Heavily-doped steel slag foam concrete building block and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106892624A (en) * | 2017-03-29 | 2017-06-27 | 河北建筑工程学院 | A kind of iron tailings foam concrete and prefabricated steel framework wallboard and its construction method |
| CN109721302A (en) * | 2018-12-27 | 2019-05-07 | 上海星欣科技发展有限公司 | A kind of sharp give up cast-in-place foamed concrete composition and its preparation and application |
| CN111362634A (en) * | 2020-05-06 | 2020-07-03 | 江苏启坤循环经济产业技术开发有限公司 | Method for preparing concrete by using industrial waste slag and steel slag to replace natural sand |
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Application publication date: 20140319 |