CN1872775A - Air entrained concrete in low shrinkage - Google Patents
Air entrained concrete in low shrinkage Download PDFInfo
- Publication number
- CN1872775A CN1872775A CNA2006100859311A CN200610085931A CN1872775A CN 1872775 A CN1872775 A CN 1872775A CN A2006100859311 A CNA2006100859311 A CN A2006100859311A CN 200610085931 A CN200610085931 A CN 200610085931A CN 1872775 A CN1872775 A CN 1872775A
- Authority
- CN
- China
- Prior art keywords
- lime
- sand
- low shrinkage
- air entrained
- entrained concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
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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
This invention relates to an aerated concrete, which is composed of: fly ashes and sands 50-59 wt.%, lime 19.5-34 wt.%, cement 5.5-18 wt.%, and gypsum 0.5-3.5 wt.%. The weight ratio of fly ashes to sands is (5-29) :( 71-95). The aerated concrete is also composed of Al powder 0.04-0.09 wt. % of the dry mixture. The aerated concrete has such advantages as little shrinkage, no cracking, and no hollow expansion.
Description
Affiliated technical field:
The present invention relates to a kind of material of construction, particularly a kind of aerating concrete.
Background technology:
According to raw materials used difference, mainly contain three kinds of aerating concretes at present: the one, mainly use flyash, cement, lime processes (hereinafter to be referred as fly ash aeroconcretes), the 2nd, mainly use cement, lime, sand processes (hereinafter to be referred as lime sand aerating concrete), the 3rd, mainly use cement, slag, sand processes (hereinafter to be referred as slag sand aerating concrete), what wherein output was maximum is fly ash aeroconcretes, but the Young's modulus of fly ash aeroconcretes, tension and folding strength are lower than other two kinds of aerating concretes, dry shrinkage is more much bigger than other two kinds of aerating concretes, weather resistance and frost resistance are also not as other two kinds of aerating concretes, and the ultimate compression strength of other two kinds of aerating concretes, fire performance is not as fly ash aeroconcretes, with easy to crack behind the existing aerating concrete wall plastering that particularly fly ash aeroconcretes is built by laying bricks or stones, hollowing, the aerating concrete is built exterior enclosure wall by laying bricks or stones and is used seldom, the heat preservation and insulation that existing three kinds of aerating concretes are had can not be given full play to, therefore, the performance of further improving the aerating concrete is shrinkage particularly, ftracture behind the wall plastering of avoiding the aerating concrete to build by laying bricks or stones, the problem of hollowing takes place, and is very necessary for further applying of aerating concrete.The patent No. is 200310106557.5 and is called the patent of invention of " high-performance aerated concrete ", performance to fly ash aeroconcretes, lime sand aerating concrete and slag sand aerating concrete has been done very big improvement, but because the restriction of proportioning, remain in certain limitation, can not realize the requirement of air entrained concrete in low shrinkage fully.
Summary of the invention:
Purpose of the present invention: a kind of technical scheme of air entrained concrete in low shrinkage is provided, utilizes this scheme can produce air entrained concrete in low shrinkage, adopt cracking behind the wall plastering that air entrained concrete in low shrinkage builds by laying bricks or stones, the hollowing phenomenon reduces or avoid, and helps applying of aerating concrete.
Technical scheme of the present invention: air entrained concrete in low shrinkage, comprise flyash, sand, lime, cement, gypsum, the weight proportion of component is: flyash adds sand: lime: cement: gypsum equals 50-59%: 19.5-34%: 5.5-18%: 0.5-3.5% or 71-74%: 19.5-34%: 5.5-18%: 0.5-3.5%; The weight ratio of flyash and sand equals 5-29%: 95-71% or 71-95%: 29-5%, and be added with the aluminium powder of dry mix gross weight 4-9/ ten thousand.Adopt the proportioning raw materials of this technical scheme can produce than " high-performance aerated concrete " patent of invention have low-shrinkage more can the aerating concrete.
Needs according to producing also can be added with the benzene sulfonate formaldehyde condensation products NF-2-1 or the NF-2-6 that are less than or equal to dry mix gross weight 1%, and as retardant, NF-2-1, NF-2-6 are that Beijing Tsing-Hua University China enlightening synthetic materials affiliated company produces.Or add the trolamine that is less than or equal to lime weight 0.3%, or add the spaonin powder of dry mix gross weight 4-9/ ten thousand.The quality of flyash meets standard GB 1596-91, and the chiltern amount requires: contain SiO
2＞80% (weight, as follows), k
2O＜3%, Na
2O＜1.5%, cl＜0.02%, loss on ignition＜5%, silt content＜2%, granularity＜2mm.
Producing and manufacturing technique of the present invention is basic identical with " high-performance aerated concrete " and lime sand aerating concrete, and concrete steps are as follows:
1, raw material metering and pre-treatment, measure raw material and pre-treatment according to the above ratio respectively, flyash and sand are put into ball mill levigate (dry powder coal ash also not ball milling) separately or together, general employing wet-milling, specific gravity control amount of water with slurry, amount of water is as the criterion to satisfy the casting requirement, and levigated slip feeding stock tank stirs, and is standby; Gypsum is can be with the sand wet-milling standby or phosphogypsum directly added stirrer, and after lime was finely ground to calcium lime powder, it was standby to send into silo; It is standby that aluminium powder cream and spaonin powder are blunged into uniform mixed solution.
2, batching stirs: flyash and sand or sand, gypsum, flyash slip are added pouring truck (stirrer) and stir, add gypsum and cement, lime powder or cement, lime powder more successively, the mixed solution that adds aluminium powder cream and spaonin powder at last stirs into slurry.
3, cast, quiet stopping and cutting, steam press maintenance: slurry is injected mould, send quiet more than 35 ℃ to stop that the chamber is quiet stops, treat slurry firmly than, blank strength reaches 0.5Kg/cm
2After, the demoulding cuts into the goods of required specification with cutting machine with base substrate, send the autoclave maintenance again, and steam press maintenance finishes, and goes out still, and the air entrained concrete in low shrinkage finished product is made.
Major advantage of the present invention: the dried contraction of air entrained concrete in low shrinkage is lower than lime sand aerating concrete, more much lower than fly ash aeroconcretes, tension, folding strength are higher than fly ash aeroconcretes, weather resistance and frost resistance are better than fly ash aeroconcretes, ultimate compression strength and fire performance are higher than lime sand aerating concrete, be used for the masonry panel back of plastering and be difficult for produce crack and hollowing phenomenon, help the performance of aerating concrete heat preservation and insulation and apply, can be used for building energy-saving standard greater than 65% energy saving building.
Embodiment:
Embodiment 1:
Measure materials at first by weight ratio: flyash: sand: lime: cement: gypsum equals 10%: 46%: 28%: 15%: 1%, aluminium powder is 6.5/ ten thousand of an above-mentioned dry mix gross weight, spaonin powder is 6.5/ ten thousand of an above-mentioned dry mix gross weight, flyash and sand add the ball mill wet-milling together, certainly also can grind respectively, the flyash quality meets the requirements and also can not grind, with slurry specific gravity control amount of water, final amount of water is a standard to satisfy the casting requirement, the levigated slurry send stirrer to stir, and add terra alba successively, cement, calcium lime powder, the mixed solution that adds aluminium powder cream and spaonin powder at last is stirred into slurry, and the mould that reinjects send quiet more than 35 ℃ to stop that the chamber is quiet stops, treat that slurry sclerosis, blank strength reach or greater than 0.5Kg/cm
2After, the demoulding cuts into the goods of required specification with base substrate, send the autoclave maintenance, steam press maintenance finish still air entrained concrete in low shrinkage.Flyash should meet GB GB1596-91, and the Chemical Composition of sand and impurity weight ratio are: SiO
2〉=85%, k
2O≤2.7%, Na
2O≤0.24%, cl≤0.002%, loss on ignition≤0.48%, earth≤1%, 0.08mm tails over 0.7%.
Embodiment 2:
Difference with embodiment 1: flyash in the slurry: sand: lime: cement: the weight proportion of gypsum equals 17%: 42%: 26.5%: 13%: 1.5%, and be added with benzene sulfonate formaldehyde condensation products NF-2-1 or the NF-2-6 that is less than or equal to dry mix gross weight 1%, as retardant.
Embodiment 3:
Difference with embodiment 1: flyash in the slurry: sand: lime: cement: the weight proportion of gypsum equals 2.5%: 47.5%: 31.2%: 18%: 0.8%, and be added with the trolamine that is less than or equal to lime consumption (weight) 0.3%.
Embodiment 4:
Difference with embodiment 1,2 or 3: flyash in the slurry: sand: lime: cement: the weight proportion of gypsum equals 20%: 52%: 18.5%: 8%: 1.5%.
Embodiment 5:
Difference with embodiment 1,2,3 or 4: flyash in the slurry: sand: lime: cement: the weight proportion of gypsum equals 21%: 50%: 21%: 7%: 1%.
Claims (4)
1, air entrained concrete in low shrinkage, comprise flyash, sand, lime, cement, gypsum, it is characterized in that: the weight proportion of component is: flyash adds sand: lime: cement: gypsum equals 50-59%: 19.5-34%: 5.5-18%: 0.5-3.5% or 71-74%: 19.5-34%: 5.5-18%: 0.5-3.5%; The weight ratio of flyash and sand equals 5-29%: 95-71% or 71-95%: 29-5%, and be added with the aluminium powder of dry mix gross weight 4-9/ ten thousand.
2, according to the described air entrained concrete in low shrinkage of claim 1, it is characterized in that: also be added with the benzene sulfonate formaldehyde condensation products NF-2-1 or the NF-2-6 that are less than or equal to dry mix gross weight 1%.
3, according to the described air entrained concrete in low shrinkage of claim 1, it is characterized in that: also be added with the trolamine that is less than or equal to lime weight 0.3%.
4, according to the described air entrained concrete in low shrinkage of claim 1, it is characterized in that: the spaonin powder that also is added with dry mix gross weight 4-9/ ten thousand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100859311A CN100384770C (en) | 2006-06-06 | 2006-06-06 | Air entrained concrete in low shrinkage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100859311A CN100384770C (en) | 2006-06-06 | 2006-06-06 | Air entrained concrete in low shrinkage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1872775A true CN1872775A (en) | 2006-12-06 |
| CN100384770C CN100384770C (en) | 2008-04-30 |
Family
ID=37483401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100859311A Active CN100384770C (en) | 2006-06-06 | 2006-06-06 | Air entrained concrete in low shrinkage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100384770C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101747011B (en) * | 2008-12-17 | 2012-12-12 | 昊青薪材（北京）技术有限公司 | Light bearing wall material and production method thereof |
| CN103896545A (en) * | 2012-12-31 | 2014-07-02 | 青建集团股份公司 | Aerated concrete block |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1152559A (en) * | 1996-09-20 | 1997-06-25 | 张盛河 | Shale air-entrained concrete building blocks |
| CN1207238C (en) * | 2003-12-02 | 2005-06-22 | 王 | High performance aerated concrete |
-
2006
- 2006-06-06 CN CNB2006100859311A patent/CN100384770C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101747011B (en) * | 2008-12-17 | 2012-12-12 | 昊青薪材（北京）技术有限公司 | Light bearing wall material and production method thereof |
| CN103896545A (en) * | 2012-12-31 | 2014-07-02 | 青建集团股份公司 | Aerated concrete block |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100384770C (en) | 2008-04-30 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WANG NIAN Owner name: WANG ZHENG Free format text: FORMER OWNER: WANG Effective date: 20101227 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 226001 NO.113, SI STREET, NANTONG CITY, JIANGSU PROVINCE TO: 226006 NANTONGARBITRATION COMMISSION, 6/F, XINYUAN BUILDING, NO.89, TAOWU ROAD, NANTONG CITY, JIANGSU PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20101227 Address after: 226006, Nantong Arbitration Commission, six building, Xin Yuan Garden, 89 Peach Road, Jiangsu, Nantong Co-patentee after: Wang Nian Patentee after: Wang Zheng Address before: 226001 No. 113 Temple Street, Jiangsu, Nantong Patentee before: Wang |