CN100590092C - Environment- protecting and energy-saving concrete antifreeze agent - Google Patents
Environment- protecting and energy-saving concrete antifreeze agent Download PDFInfo
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- CN100590092C CN100590092C CN200710133461A CN200710133461A CN100590092C CN 100590092 C CN100590092 C CN 100590092C CN 200710133461 A CN200710133461 A CN 200710133461A CN 200710133461 A CN200710133461 A CN 200710133461A CN 100590092 C CN100590092 C CN 100590092C
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- Prior art keywords
- concrete
- environment
- energy
- protecting
- antifreeze agent
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Classifications
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/601—Agents for increasing frost resistance
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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
- C04B2111/00017—Aspects relating to the protection of the environment
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to environment-protection energy-saving concrete antifreeze, which is made by mixing the following materials according to the share ratio of quality; rubber powder of 100 parts,water reducing agent of 2 to 10 parts, magnesia of 10 to 40 parts, alum calcimine of 10 to 40 parts and anhydrite of 5 to 30 parts. The invention makes full use of the solid waste of rubber powder, thereby having the advantages of environmental protection and energy saving. Besides, the volume of the rubber powder cannot be changed in the process of mixing, transportation and pouring, thereby overcoming the influence to the performance of concrete due to the damage of the air content of air entraining agent. The freeze resisting property of the concrete can be greatly improved by mixing the invention to the concrete according to 10 to 25 percent of the weight of the cement.
Description
Technical field
The present invention relates generally to a kind of antifreezing agent that is used to improve concrete frost resistance, and particularly a kind of is the concrete antifreezing agent of main component with the waste rubber powder, belongs to building material technical field.
Background technology
Waste old is mainly derived from rubber items such as damaged tire, scrap rubber footwear, scrap rubber pipe and adhesive tape, and next derives from scrap stock and the waste product that produces in the rubber production process, belongs to using industrial solid waste.Waste rubber belongs to thermoset copolymer material, is difficult to degraded under the natural condition.If outdoor storage, not only land occupation, worsen physical environment, destroy plant-growth, and very easily grow mosquito through after exposing to the sun and rain, spread disease, jeopardize ecotope.At present, about 2,000 ten thousand tons of the annual production of whole world waste old, the annual production of China's waste old are estimated to have reached 1,500,000 tons, wherein doughnut whole world year learies has more than 1,000,000,000, according to statistics, China's junked tire in 2002 reaches 8,000 ten thousand, reaches 1.12 hundred million in 2005.Along with the develop rapidly of automotive industry, the generation of China's junked tire is also with double-digit speed increment in every year, and the annual production that expects waste old in 2010 will reach 200,000,000.So a large amount of waste rubbers brings very big environmental stress, thereby the processing of junked tire is extremely urgent.Because reclaimed rubber is easy to generate secondary pollution in process of production, producing rubber powder has become the main path that waste old is recycled.In addition, China's rubber resource is in short supply relatively, almost rubber year consumption 45% need import.Therefore, carry out the comprehensive utilization of waste Crumb rubber, to the protection environment, economizing on resources has important theory and realistic meaning.
Since the twenties in 19th century, portland cement came out, concrete material and utilisation technology thereof were constantly developed.Concrete has now become consumption maximum in the modern civil engineering, material of construction that purposes is the widest.If can correctly design concrete according to environment for use, to construct on request and maintenance simultaneously, concrete will be a kind of very competent structured material, can reach a century even more of a specified duration its work-ing life.Yet the freeze-thaw cycle effect is world's cold district, and particularly the one of the main reasons of severe cold area concrete destruction occurs in the buildings that dam, road, pond, power station cooling tower etc. contact with water mostly.Past has all occurred considerable concrete structure both at home and abroad because of being subjected to freeze thawing Circulation destructive example too early because concrete freeze-thaw damage problem is paid attention to inadequately.Along with the continuous development of concrete technology, people mix air entrapment agent and can effectively improve concrete frost resistance by discovering in concrete.At present, the air entrapment agent type that is used to improve concrete frost resistance mainly contains bathvillite salt, rosin early and colophonium pyrolytic polymer, saponin class and alkylaryl sulphonate class.Though above-mentioned bleed type antifreezing agent can effectively improve concrete frost resistance, loss, promptly usually said air content damage problem all can appear in micro-bubble that they are introduced inevitably in the process that stirs, transports and build.Air content loss problem makes the concrete true air content in sclerosis back be difficult to design or control, and concrete true air content is too high, can reduce concrete intensity; Air content is low excessively, is difficult to reach the frost resistance of expection.
In sum, waste rubber has brought the serious environmental pressure and the wasting of resources to us on the one hand, and on the other hand, the cement concrete of north cold area is faced with serious freeze-thaw damage problem.Therefore, if can solve concrete freeze-thaw damage problem, not only protect environment, economize on resources, and can improve the concrete frost resistance of China's cold district, have important environmental benefit and economic benefit with rubber powder.
Summary of the invention
The technical problem to be solved in the present invention is problem of environmental pollution, concrete freeze-thaw damage problem and interpolation bleed type air content that antifreezing agent the produces loss problem in concrete that waste rubber causes.
According to available coagulation soil freeze injury theory, be in when below freezing at concrete, at first be to begin to freeze near the free water content in the hole on surface, about 9% volumetric expansion takes place.Produced frost heave stress at inside concrete, thereby moved to inside concrete after making the moisture pressurized that does not freeze.Just produced hydrostaticpressure when migration is tied, hydrostaticpressure repeatedly makes the microfracture of inside concrete vulnerable area expand gradually, be communicated with until destruction.After mixing air entrapment agent in the concrete, owing to introduce a large amount of micro bubbles, be evenly distributed on inside concrete, just can hold the migration of free water, thereby relaxed hydrostaticpressure widely, this just can improve concrete significantly and bear multigelation round-robin ability.The applicant is by discovering, rubber is macromolecular elastomer, rubber powder is mixed in the concrete can relax hydrostaticpressure equally, improves concrete frost resistance, and there is not the air content loss problem of bleed type antifreezing agent in rubber powder as antifreezing agent.
According to concrete destruction mechanism of frost-thawing as can be known, water is one of prerequisite of concrete generation freeze-thaw damage.Therefore, improve concrete impermeability, stoping moisture to enter inside concrete also is one of important measures that improve concrete frost resistance.There are some researches show, concrete is before bearing load or external stress, because the recrystallize and the slurry of chemical shrinkage, dry shrinkage, carbonization, hydrated product and the effects such as difference between the thermal expansivity of gathering materials, the tiny crack or the hole of a large amount of stochastic distribution in the inside concrete disperse, and these tiny cracks or hole provide passage for moisture infiltrates inside concrete.Therefore, reduce concrete contraction, the quantity that reduces the inside concrete tiny crack is also very crucial to improving concrete frost resistance.The effective measure that reduce concrete shrinkage at present are to mix swelling agent in concrete.The applicant is through research, following discovery is arranged: composite by a certain percentage the effect of anhydrite and alum stone flour with compensating concrete early-age shrinkage, but its expansion behavior mainly is created in before the 28d, and is not obvious to the compensating action that the concrete later stage (28d is after the length of time) shrinks.And MgO also can be used as concrete swelling agent, and it mainly after being embodied in 28d, has complementarity with the expansion of anhydrite and alum stone flour to the compensating action of concrete shrinkage.
Based on above-mentioned research and discovery, for solving the problem that aforementioned prior art exists, it is main raw material(s) that the present invention adopts rubber powder, carry out composite with anhydrite, alum stone flour, MgO and water reducer, make a kind of environment-protecting and energy-saving concrete antifreeze agent, both solve the problem of environmental pollution of waste rubber, solved concrete freeze-thaw damage problem again, also can avoid the air content loss problem of bleed type antifreezing agent simultaneously.
The present invention is formed fully by following components in mass portion numeral system:
Rubber powder: 100 parts;
Water reducer: 2-10 part;
Magnesium oxide: 10-40 part;
Alum stone flour: 10-40 part;
Anhydrite: 5-30 part.
Rubber powder of the present invention is processed by waste old, its fineness 〉=80 orders;
Water reducer of the present invention is a pulvis, can be sulfonated lignin, the senior condenses of naphthalene sulphonate formaldehyde, amino sulphur sulfonate or polycarboxylic acid series, water-reducing rate＞20%, it mainly acts on is to improve concrete mixture performance, eliminates rubber powder to the Concrete Construction Effect on Performance.
Magnesium oxide of the present invention should satisfy following requirement: MgO 〉=85%, CaO≤3.0%, and loss on ignition≤4.0%, water ratio≤3.0%, alkali content≤0.6%, chloride ion content≤0.1%, 0.08mm tails over＜8%.
Alum stone flour Al of the present invention
2O
3Content＞16%, 0.08mm tails over＜8%, water ratio＜3%.
SO in the anhydrite of the present invention
3Content＞50%.
With above-mentioned component in proportion uniform mixing can make the present invention, Main Feature of the present invention is:
(1) the present invention is mixed in the concrete by 10%～25% of cement quality, can obviously improve concrete frost resistance;
(2), thereby overcome air entrapment agent air content loss problem to the concrete performance adverse influence owing to rubber powder volume in the process that stirs, transports and build can not change;
(3) because the present invention makes full use of solid waste---rubber powder has the characteristics of environmental protection and energy saving.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to following examples, sees Table 1.
Table 1 embodiment proportioning
The antifreezing agent that the various embodiments described above are made all can improve concrete frost resistance by 10%～25% outer mixing in the concrete (proportioning sees Table 2) of cement quality, detect concrete mixture performance, intensity and the frost resistance for preparing with the foregoing description by standard GBJ80-85, GBJ82-85, the results are shown in Table 3.
Table 2 concrete mix
Table 3 concrete frost resistance
As can be seen from Table 3, the antifreezing agent that the present invention makes can significantly improve concrete frost resistance, and the concrete slump is not had obvious influence.Volume of the present invention is high more, and concrete frost resistance is good more, and unit weight is more little, and intensity is low more.Can satisfy the frost resistance requirement of most of cold districts with the concrete of the present invention's preparation.
Claims (7)
1, a kind of environment-protecting and energy-saving concrete antifreeze agent is characterized in that being formed than preparation by following components in mass portion number: rubber powder: 100 parts, water reducer: 2-10 part, magnesium oxide: 10-40 part, alum stone flour: 10-40 part, anhydrite: 5-30 part.
2, environment-protecting and energy-saving concrete antifreeze agent as claimed in claim 1 is characterized in that described rubber powder is processed by waste old, its fineness 〉=80 orders.
3, environment-protecting and energy-saving concrete antifreeze agent as claimed in claim 1 is characterized in that described water reducer is a pulvis, is selected from sulfonated lignin, sulfamate or poly carboxylic acid series water reducer, water-reducing rate＞20%.
4, environment-protecting and energy-saving concrete antifreeze agent as claimed in claim 1 is characterized in that described magnesium oxide should satisfy following requirement: MgO 〉=85%, CaO≤3.0%, loss on ignition≤4.0%, water ratio≤3.0%, alkali content≤0.6%, chloride ion content≤0.1%, 0.08mm tails over＜8%.
5, environment-protecting and energy-saving concrete antifreeze agent as claimed in claim 1 is characterized in that Al in the described alum stone flour
2O
3Content＞16%, 0.08mm tails over＜8%, water ratio＜3%.
6, environment-protecting and energy-saving concrete antifreeze agent as claimed in claim 1 is characterized in that SO in the described anhydrite
3Content＞50%.
7, any described environment-protecting and energy-saving concrete antifreeze agent of claim 1-6 is characterized in that its volume in concrete is a cement quality 10%～25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710133461A CN100590092C (en) | 2007-09-30 | 2007-09-30 | Environment- protecting and energy-saving concrete antifreeze agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710133461A CN100590092C (en) | 2007-09-30 | 2007-09-30 | Environment- protecting and energy-saving concrete antifreeze agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101172807A CN101172807A (en) | 2008-05-07 |
| CN100590092C true CN100590092C (en) | 2010-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710133461A Active CN100590092C (en) | 2007-09-30 | 2007-09-30 | Environment- protecting and energy-saving concrete antifreeze agent |
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| Country | Link |
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| CN (1) | CN100590092C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109867740A (en) * | 2017-12-01 | 2019-06-11 | 徐州市贾汪区韵谨工贸有限公司 | A kind of antifreeze agent for concrete |
| CN108545992B (en) * | 2018-05-18 | 2019-09-10 | 温州百捷建设有限公司 | A kind of municipal administration environment-friendly type concrete antifreezing agent |
| CN111908866A (en) * | 2020-07-30 | 2020-11-10 | 重庆众通南一混凝土有限公司 | High-conductivity concrete |
| CN113233815A (en) * | 2021-05-10 | 2021-08-10 | 北京工业大学 | Non-air-entraining type antifreeze agent suitable for cement-based material |
-
2007
- 2007-09-30 CN CN200710133461A patent/CN100590092C/en active Active
Non-Patent Citations (4)
| Title |
|---|
| 橡胶粉对混凝土在水和NaCl溶液中抗冻性的影响. 张亚梅等.东南大学学报(自然科学版)，第36卷. 2006 |
| 橡胶粉对混凝土在水和NaCl溶液中抗冻性的影响. 张亚梅等.东南大学学报(自然科学版)，第36卷. 2006 * |
| 高效混凝土抗冻剂的研制. 焦宝祥等.盐城工学院学报，第10卷第1期. 1997 |
| 高效混凝土抗冻剂的研制. 焦宝祥等.盐城工学院学报，第10卷第1期. 1997 * |
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| Publication number | Publication date |
|---|---|
| CN101172807A (en) | 2008-05-07 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangyan Bote New Materials Co.,Ltd. Assignor: Jiangsu Bote New Materials Co., Ltd. Contract record no.: 2012320000625 Denomination of invention: Environment- protecting and energy-saving concrete antifreeze agent Granted publication date: 20100217 License type: Exclusive License Open date: 20080507 Record date: 20120522 |
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| ASS | Succession or assignment of patent right |
Owner name: JIANGSU SUBOTE NEW MATERIAL CO., LTD. Free format text: FORMER OWNER: BOTE NEW MATERIAL CO., LTD., JIANGSU Effective date: 20140512 |
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Free format text: CORRECT: ADDRESS; FROM: 211100 NANJING, JIANGSU PROVINCE TO: 211103 NANJING, JIANGSU PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140512 Address after: 211103, No. 59 West Wan An Road, Jiangning District, Jiangsu, Nanjing Patentee after: Jiangsu Subute New Materials Co., Ltd. Address before: 211100, Nanjing, Jiangsu province Jiangning district on the opposite side of the town square police station Patentee before: Jiangsu Bote New Materials Co., Ltd. |
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| CP02 | Change in the address of a patent holder |
Address after: No.6 shuiyougang, Gulou District, Nanjing City, Jiangsu Province 210013 Patentee after: JIANGSU SUBOTE NEW MATERIALS Co.,Ltd. Address before: 211103, No. 59 West Wan An Road, Jiangning District, Jiangsu, Nanjing Patentee before: JIANGSU SUBOTE NEW MATERIALS Co.,Ltd. |
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