CN100526250C - Interface finishing agent improving rubber-cement stone substrate in rubber concrete - Google Patents

Interface finishing agent improving rubber-cement stone substrate in rubber concrete Download PDF

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Publication number
CN100526250C
CN100526250C CNB2007101770530A CN200710177053A CN100526250C CN 100526250 C CN100526250 C CN 100526250C CN B2007101770530 A CNB2007101770530 A CN B2007101770530A CN 200710177053 A CN200710177053 A CN 200710177053A CN 100526250 C CN100526250 C CN 100526250C
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China
Prior art keywords
rubber
concrete
coupling agent
interface
percent
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Expired - Fee Related
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CNB2007101770530A
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Chinese (zh)
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CN101182157A (en
Inventor
李悦
王敏
金彩云
吴玉生
韩兆兴
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Beijing University of Technology
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Beijing University of Technology
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Publication of CN100526250C publication Critical patent/CN100526250C/en
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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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • 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
    • 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
    • C04B2103/0045—Polymers chosen for their physico-chemical characteristics
    • 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
    • C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
    • C04B2103/0091—Organic co-binders for mineral binder compositions
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

An interface finishing agent for improving a rubber-cement paste matrix in rubberized concrete belongs to the concrete additive technical field. At present, interface finishing agents for improving the rubber particle-cement paste matrix mainly includes washing treatment, Na (OH) solution and carbon tetrachloride solution washing treatment, etc. However, the application effects of the materials are not ideal. The invention is characterized in that the invention is made from evenly mixed three materials of styrene-acrylate-silicone coupling agent copolymer, ethylene-vinyl acetate copolymer, (PVA) polyvinyl alcohol coupling agent. The weight percentage of the components is 40-70 percent of the styrene-acrylate-silicone coupling agent copolymer, 20-40 percent of the ethylene-vinyl acetate copolymer and 10-20 percent of the PVA coupling agent. Compared with crumb rubber concrete, the surface of which is not treated, the interface agent of the invention can effectively improve the interface adhesion strength between the rubber particles and the cement paste matrix and further improve the compressive strength of the crumb rubber concrete by 6 percent above, which has no harmful effects on the workability of the concrete.

Description

A kind of interface treating agent that improves rubber-cement stone substrate in the rubber concrete
Technical field
The invention belongs to technical field of concrete additives.This kind interface treating agent can significantly improve the interface binding intensity between the rubber grain and cement stone substrate in the rubber aggregate concrete, and then improves concrete intensity and weather resistance, does not influence concrete workability simultaneously.
Background technology
Concrete material is the material of construction that the present mankind are most widely used, but the high fragility of the inherent of concrete, shortcoming such as easy to crack own has had a strong impact on the weather resistance of concrete structure.The concrete brittle method of reduction at present commonly used comprises fiber reinforcement, polymer modification etc., but the application of the two can significantly improve concrete price, and fiber and polymkeric substance itself are also produced by consuming ample resources.Waste old is a kind of of solid trade waste, and along with rubber industry and developing of automobile industry, a large amount of junked tires, rubber item and leftover bits thereof are on the increase.For example, 2.7 hundred million rubber tyres of the annual generation of the U.S., up to now, more than 300,000,000 rubber tyre do not done any processing.In China, along with the develop rapidly of automotive industry, the generation of junked tire increases year by year, and the generation of China's junked tire in 2005 according to incompletely statistics, wherein has the tire about 20% not obtain recycling near 100,000,000 approximately.These tires have not only caused huge threat to environment, and are a kind of serious wastings of resources.Therefore the handling problem to junked tire has become serious social concern, and the solution of novelty is devoted to seek in countries in the world always.
Junked tire is broken into the rubber grain admixture in concrete, thereby improves a kind of inventive process that concrete fragility has been external research and development since the nineties in 20th century.The rubber aggregate concrete of preparing has the advantage of many uniquenesses: concrete fragility significantly reduces, and after the rubber powder volume acquired a certain degree, cement concrete demonstrated flexibility, and forms " elastic concrete ".This kind concrete also has functions such as shock resistance, damping antidetonation, light thermal-insulation, noise reduction sound insulation, air-and water-permeable, is a kind of good building function material.But studies show that along with the increase of rubber powder volume, concrete crushing strength can significantly reduce, therefore low excessively rubber concrete intensity range of application and the field that can limit rubber concrete greatly.
Gather materials in the concrete and the interface cohesive strength of cement matrix has remarkable influence to performances such as concrete bulk strengths, one of important method that improves rubber concrete intensity at present is exactly to improve the performance of rubber concrete by the pre-treatment of rubber powder particle surface.Present existing pretreatment process comprises flushing with clean water, Na (OH) solution corrosion and carbon tetrachloride solution clean etc., though aforesaid method can improve concrete intensity to a certain extent, but the raising effect to intensity is all limited, and all exists variety of issue.For example, the clear water rubber concrete intensity of cleaning improves not obvious; Na (OH) solution has intensive corrodibility, and is harmful and can cause concrete destructive alkali-aggregate reaction; Carbon tetrachloride solution also has toxicity and intensive volatility, and price is very high.Therefore, the interface treating agent of seeking a kind of moderate cost and excellent performance has great importance and practical value for the performance of improving rubber concrete.
Summary of the invention
At the weak point of existing rubber aggregate-cement stone substrate interface processing material and method, the objective of the invention is to prepare a kind of rubber aggregate-cement stone substrate interface treating agent.Compare with untreated rubber aggregate concrete, the concrete intensity of the pretreated rubber aggregate of interfacial agents is significantly increased, and does not have bad to concrete workability.
To achieve these goals, technical scheme of the present invention is: adopt vinylbenzene-acrylate-organo-silicon coupling agent multipolymer, ethene-vinyl acetate copolymer, PVAC polyvinylalcohol coupling agent uniform mixing to make.The weight percent of each component is respectively: vinylbenzene-acrylate-organo-silicon coupling agent copolymer comprised 40～70%, ethylene-vinylacetate copolymer comprised 20～40%, 10～20%, three kinds of material requirements of PVAC polyvinylalcohol coupling agent mix.
Using method: use rubber aggregate-cement stone substrate interfacial agents of making that pre-treatment has been carried out on the surface of rubber grain, the consumption of interfacial agents is 1～2% of a rubber consumption, at first interfacial agents is dissolved in the warm water of 40～900C, fully disperse and stir, then the rubber grain and the interfacial agents aqueous solution are stirred, be placed at last under the exsiccant environment up to the rubber particle surface complete drying.The direct admixture of handling through interfacial agents of rubber grain uses in cement concrete.
Compare with not surface treated rubber aggregate concrete, rubber aggregate of the present invention-cement stone substrate interfacial agents can improve the interface cohesive strength between rubber grain and the cement stone substrate effectively, and then improve the concrete ultimate compression strength of rubber aggregate more than 6%, and concrete workability there is not detrimentally affect.Compare with existing rubber aggregate interface preconditioning technique, characteristics of the present invention are that product can more effectively improve interface cohesive strength and concrete entire compression intensity, and price is low, technical process safety, simple and practical, are easy to realize the engineering application.
Embodiment
Prescription (the weight ratio of compound interface agent, units) be: vinylbenzene-acrylate-organo-silicon coupling agent copolymer comprised 40～70%, ethylene-vinylacetate copolymer comprised 20～40%, 10～20%, three kinds of materials of PVA coupling agent mix in proportion.The consumption of interfacial agents is 1～2% of a rubber grain consumption, at first interfacial agents is dissolved in 40～90 ℃ the warm water, fully disperse and stir, then the rubber grain and the interfacial agents aqueous solution are stirred, be placed at last under the exsiccant environment up to the rubber particle surface complete drying.The direct admixture of handling through interfacial agents of rubber grain uses in cement concrete.
The concrete benchmark proportioning of rubber aggregate is: cement 450kg/m 3, water 167kg/m 3, sand 597kg/m 3, rubber aggregate 70kg/m 3, stone 1021kg/m 3, naphthalene series high-efficiency water-reducing agent 4.5kg/m 3Cement is ordinary Portland cement P.O 42.5, and sand is the medium sand of fineness modulus 2.8, and stone is the cobble of 5～20mm continuous grading.The median size 4.2mm of rubber aggregate, apparent density is 1100kg/m 3
Interfacial agents 1 prescription is: vinylbenzene-acrylate-organo-silicon coupling agent copolymer comprised 40%, ethylene-vinylacetate copolymer comprised 40%, PVA coupling agent 20%.
Interfacial agents 2 prescriptions are: vinylbenzene-acrylate-organo-silicon coupling agent copolymer comprised 50%, ethylene-vinylacetate copolymer comprised 30%, PVA coupling agent 20%.
Interfacial agents 3 prescriptions are: vinylbenzene-acrylate-organo-silicon coupling agent copolymer comprised 50%, ethylene-vinylacetate copolymer comprised 35%, PVA coupling agent 15%.
Interfacial agents 4 prescriptions are: vinylbenzene-acrylate-organo-silicon coupling agent copolymer comprised 60%, ethylene-vinylacetate copolymer comprised 30%, PVA coupling agent 10%.
Interfacial agents 5 prescriptions are: vinylbenzene-acrylate-organo-silicon coupling agent copolymer comprised 70%, ethylene-vinylacetate copolymer comprised 20%, PVA coupling agent 10%.
Figure C200710177053D00051

Claims (1)

1, a kind of interface treating agent that improves rubber-cement stone substrate in the rubber concrete is characterized in that: adopt vinylbenzene-acrylate-organo-silicon coupling agent multipolymer, ethylene-vinylacetate multipolymer and polyvinyl alcohol coupling agent uniform mixing to make; The weight percent of each component is respectively: vinylbenzene-acrylate-organo-silicon coupling agent copolymer comprised 40～70%, ethylene-vinylacetate copolymer comprised 20～40%, polyvinyl alcohol coupling agent 10～20%.
CNB2007101770530A 2007-11-09 2007-11-09 Interface finishing agent improving rubber-cement stone substrate in rubber concrete Expired - Fee Related CN100526250C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2007101770530A CN100526250C (en) 2007-11-09 2007-11-09 Interface finishing agent improving rubber-cement stone substrate in rubber concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2007101770530A CN100526250C (en) 2007-11-09 2007-11-09 Interface finishing agent improving rubber-cement stone substrate in rubber concrete

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CN100526250C true CN100526250C (en) 2009-08-12

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101343166B (en) * 2008-07-18 2012-02-22 北京工业大学 Preparation method for impact resistant ecological concrete
CN101343162B (en) * 2008-08-25 2011-03-30 武汉理工大学 High-ductility polymer-rubber powder-honey-combed cement concrete road covering material and construction process thereof
CN102199022A (en) * 2011-03-26 2011-09-28 大连理工大学 Self-compacting and frost thawing resistance concrete
CN102190466A (en) * 2011-03-26 2011-09-21 大连理工大学 Heat insulating concrete
CN103436117A (en) * 2013-07-19 2013-12-11 北京东方雨虹防水技术股份有限公司 Concrete surfactant and preparation method thereof
CN104311865B (en) * 2014-10-13 2017-04-05 重庆交通大学 A kind of rubber surface method of modifying

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002348168A (en) * 2001-05-30 2002-12-04 Kowa Chem Ind Co Ltd Quick hardening, humidity adjustable inorganic diatomaceous paint finishing material and its method
CN1393420A (en) * 2001-06-27 2003-01-29 马奔 Metal rubber concrete and its preparing process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002348168A (en) * 2001-05-30 2002-12-04 Kowa Chem Ind Co Ltd Quick hardening, humidity adjustable inorganic diatomaceous paint finishing material and its method
CN1393420A (en) * 2001-06-27 2003-01-29 马奔 Metal rubber concrete and its preparing process

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