CN103073222A - Modified VAE and composite mortar containing same - Google Patents
Modified VAE and composite mortar containing same Download PDFInfo
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- CN103073222A CN103073222A CN2013100275616A CN201310027561A CN103073222A CN 103073222 A CN103073222 A CN 103073222A CN 2013100275616 A CN2013100275616 A CN 2013100275616A CN 201310027561 A CN201310027561 A CN 201310027561A CN 103073222 A CN103073222 A CN 103073222A
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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
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- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses modified VAE (vinyl acetateethylene emulsion) which is characterized in that the modified VAE comprises common VAE, and a rosin toluene solution with mass accounting for 4-7% of total mass of the modified VAE, wherein the mass percent of rosin in the rosin toluene solution is 3-5%. The invention further provides composite mortar containing the modified VAE, which is scientific and reasonable in component proportion, high in compressive strength and flexural strength, low in shrinkage, fireproof, high in aggregation force and convenient and quick to construct, and is particularly applicable to reinforcing a concrete structure and a masonry structure.
Description
Technical field
The invention belongs to the technical field of building operation, relate in particular to a kind of modification VAE emulsion and contain the composite mortar of this emulsion.Modification VAE emulsion has very strong cohesive force to timber, metal sheet, non-woven fabrics etc., and curing speed is fast, and water tolerance is high, and excellent storage stability is with low cost.The composite mortar ultimate compression strength and the High anti bending strength that contain this emulsion shrink that little, fire-resistant, cohesion is strong, construction is convenient, are applicable to the reinforcement and strengthening to Concrete and Masonry Structure.
Background technology
Along with the development of building industry, owing to defective and the factors such as damage, Construction defect of environment to the burn into structure of material, building structure local failure or destruction, structural collapse, quality accident occurs now and then, even jeopardizes the people's life security.
The normal composite mortar that contains the VAE emulsion that uses of the reinforcement material of building structure carries out reinforcement and strengthening to some weak parts.The VAE emulsion is the abbreviation of vinyl acetate-ethylene copolymerization emulsions, is take vinyl acetate between to for plastic and vinyl monomer as basic raw material, the macromolecule emulsion that forms by the emulsion polymerisation process copolymerization with other auxiliary material.Although VAE emulsion sizing agent excellent property still has the some shortcomings part, not ideal enough such as tack, bonding strength is not bery high, water tolerance is relatively poor, curing speed is slightly slow, price comparison is high, these have all limited its widespread use.
Its performance is improved in the at first logical modification to the VAE emulsion of the present invention, makes VAE emulsion sizing agent can satisfy more needs, then is equipped with reinforcing mat and specifically tests by conjugated fibre being spiked into polymer mortar, determines the optimum mix amount of its component.
Summary of the invention
One object of the present invention is to overcome defects of the prior art, and a kind of modification VAE emulsion is provided, and can effectively improve tack, also can improve bonding strength simultaneously.
A kind of modification VAE emulsion is characterized in that, comprises common VAE emulsion and the rosin toluene solution that accounts for modification VAE emulsion total mass 4% ~ 7%, and the mass percent of rosin is 3% ~ 5% in the described rosin toluene solution.
The preparation method of modification VAE emulsion is dissolved in rosin first toluene or other organic solvents, there being in the presence of a small amount of emulsifying agent high-speed stirring make rosin milk (3% ~ 5%), then mixes with common VAE emulsion; Also the rosin toluene solution can be mixed with the direct stirring and emulsifying of common VAE emulsion.Rosin toluene solution content accounts for 4% ~ 7% of modification VAE quality of the emulsion.Prepared modification VAE emulsion sizing agent is bonding compound effective especially to PVC film and wood-based plate or metal sheet.
In order to reduce cost, can in above-mentioned modification VAE emulsion, add some superfine talcum powders or light calcium carbonate, wherein, the add-on of superfine talcum powder is 3% ~ 5% of modification VAE quality of the emulsion; The add-on of light calcium carbonate is 2% ~ 4% of modification VAE quality of the emulsion.
VAE emulsion sizing agent after the modification has very strong cohesive force to timber, metal sheet, non-woven fabrics etc., and curing speed is fast, and water tolerance is high, and excellent storage stability is with low cost.
Another object of the present invention is to provide a kind of composite mortar that contains described modification VAE emulsion, it is characterized in that, comprise cement, sand, water, water reducer, thickening material, flyash, modification VAE emulsion, polypropylene fibre and staple fibre, wherein, the mass ratio of Shui Ni ︰ Sha ︰ water is 1 ︰, 2 ︰ 0.45; The water reducer volume is 1.5% of composite mortar quality, and the thickening material volume is 1% of composite mortar weight; Doping quantity of fly ash is 4% ~ 12% of place of cement quality, and modification VAE emulsion volume is 2% ~ 9% of composite mortar quality, and polypropylene fiber is 0.05% ~ 0.25% of composite mortar quality; The staple fibre volume is 0.4% ~ 2.0% of composite mortar quality.
Further, described doping quantity of fly ash is 10% of place of cement quality, and modification VAE emulsion volume is 5% of composite mortar quality, and polypropylene fiber is 0.2% of composite mortar quality; The staple fibre volume is 0.8% of composite mortar quality.
The mortar mix ratio that the application adopts is cement: sand: the water volume is 1:2:0.45, the water reducer volume is 1.5%, the thickening material volume is 1%, by specifically singly mixing various experiment components, change different test volumes, mortar performance is studied, and from theoretical analysis experimental phenomena separately, drawn the separately the optimum mix amount of flyash, modification VAE emulsion, polypropylene fibre and staple fibre.
Wherein, flyash can play the effect of secondary hydration, improves intensity and the degree of compactness of mortar.Modification VAE emulsion and polypropylene fibre can obviously improve the fragility problem of mortar, improve the snappiness of mortar; And staple fibre is the reticulated structure of random distribution in mortar, and is comparatively obvious to the ultimate compression strength effect of mortar.(the anti-folding of standard mortar 3d and ultimate compression strength are respectively 3.0mpa, 19.3mpa; The anti-folding of 28d and ultimate compression strength are respectively 7.4mpa, 39.8mpa.）
Below be flyash, modification VAE emulsion, polypropylene fibre and staple fibre in composite mortar different addition quantity to the mortar Effect on Mechanical Properties.
(1) flyash is to Effect on Mechanical Properties and the optimum mix amount of composite mortar
Determine minimum water requirement according to denseness, the water reducer volume is 1.5%, and the thickening material volume is 1%, Shui Ni ︰ Sha ︰ water=1 ︰, 2 ︰ 0.45, and doping quantity of fly ash is respectively 4%, 6%, 8%, 10%, 12% of place of cement content.It is as shown in table 1 to mix behind the flyash composite mortar 3d and 28d intensity.
The impact of table 1 doping quantity of fly ash composite mortar strength
From the experimental data of table 1 as can be known, the test specimen intensity of different doping quantity of fly ash, 28d ultimate compression strength is the highest when volume is 10%, and intensity is 58.1MPa, improves 45.9% than benchmark mortar; The 2d folding strength is the highest when doping quantity of fly ash is 8%, and intensity improves 20.5% for being 8.92MPa than benchmark mortar.
(2) singly mix modification modification VAE latex to the Effect on Mechanical Properties of composite mortar
The water reducer volume is 1.5%, and the thickening material volume is 1%, proportioning: Shui Ni ︰ Sha ︰ water=1 ︰, 2 ︰ 0.45, and modification VAE emulsion volume is respectively 0%, 1%, 3%, 5%, 7%, 9%.After the incorporating modified VAE emulsion under composite mortar 3 days and the 28 days normal curing conditions intensity as shown in table 2.
Table 2 modification VAE latex volume is on the impact of mortar strength
From the experimental data of table 2 as can be known, the test specimen intensity of different modification VAE emulsion volumes, ultimate compression strength is the highest when volume is 5%, and 28d ultimate compression strength is 52.87MPa, improves 33.1% than benchmark mortar, and folding strength is 9.85MPa, improves 32% than benchmark mortar.
(3) singly mix polypropylene fibre to the Effect on Mechanical Properties of composite mortar
The water reducer volume is 1.5%, and the thickening material volume is 1%, proportioning: Shui Ni ︰ Sha ︰ water=1 ︰, 2 ︰ 0.45, and polypropylene fiber is respectively 0%, 0.05%, and 0.10%, 0.15%, 0.20%, 0.25%.Mixed behind the polypropylene fibre composite mortar 3 days and 28 days normal curing conditions under intensity as shown in table 3.
Table 3 polypropylene fibre affects composite mortar strength
From the experimental data of table 3 as can be known, test specimen resistance to compression, the folding strength of different fibers contents all are higher than the benchmark mortar, and ultimate compression strength is the highest when fibers content is 0.20%, and ultimate compression strength is 62.41MPa, improve 54% than benchmark mortar; Folding strength is 8.85MPa, improves 13.7% than benchmark mortar.
(4) singly mix staple fibre to the Effect on Mechanical Properties of composite mortar
The water reducer volume is 1.5%, and the thickening material volume is 1%, and proportioning: Shui Ni ︰ Sha ︰ water=1 ︰, 2 ︰ 0.45 is singly mixed the dedicated mortar staple fibre, and length is 12 ~ 18mm, and diameter is 0.2 ~ 0.6mm.The staple fibre incorporation is respectively 0%, 0.4%, and 0.8%, 1.2%, 1.6%, 2.0%.Mixed behind the staple fibre composite mortar 3 days and 28 days normal curing conditions under intensity as shown in table 4.
Table 4 staple fibre volume is on the impact of composite mortar strength
From the experimental data of table 3 as can be known, the staple fibre volume is 0.8% to be that intensity is the climax, and 28d ultimate compression strength is 76.81MPa, improves 89.3% than benchmark mortar; Folding strength is 9.92MPa, improves 2.47% than benchmark mortar.
Experiment showed, that through singly mixing all there is optimum value in each component volume, the optimum mix amount is respectively separately, and doping quantity of fly ash is 10% of place of cement quality, and modification VAE emulsion volume is 5%, and polypropylene fibre is 0.2%, and staple fibre is 0.8%.
Several component compound uses are being carried out three when mixing orthogonal test, test-results shows, when doping quantity of fly ash is 7%, the staple fibre volume is 0.8%, polypropylene fibre is 0.25%, when modification VAE emulsion is 7.5%, 28d ultimate compression strength reaches 89.48MPa, improves 124.8% than benchmark mortar; The 28d folding strength reaches 43.39MPa, improves 90% than benchmark mortar.
Blending performance transmission effects and the interfacial effect of different materials are closely related, have brought into play performance complement and performance transmission effects by the interface.Adulterant of different nature has all played thickening power in various degree to high performance composite mortar, this is because tiny polypropylene fibre specific surface area is large, in mortar, need to adsorb the parcel of a large amount of cement slurries and polymkeric substance, thick staple fibre then can play to the composite mortar component " support " effect, this all can make the viscosity increase of composite mortar mixture, and reduces the segregation excreting water phenomenon.Flyash, polymkeric substance, polypropylene fibre, staple fibre produce the MULTIPLE COMPOSITE effect, can improve simultaneously the multiple performance of composite mortar, thereby have produced excellent enhancing, ability is split in toughness reinforcing and resistance.This has demonstrated fully organic and inorganic, fibrous type and granule type, metal and nonmetal dual and MULTIPLE COMPOSITE effect.
Common VAE emulsion of the present invention is the VAE emulsion of vinyl acetate content in 80% ~ 88% scope.
Composite mortar of the present invention, component ratio is scientific and reasonable, and ultimate compression strength and High anti bending strength, contraction are little, fire-resistant, cohesion strong, construction is convenient, are specially adapted to the reinforcement and strengthening to Concrete and Masonry Structure.
Description of drawings
Fig. 1 is that flyash, modification VAE emulsion, polypropylene fibre, staple fibre are on the synoptic diagram that affects of composite mortar folding strength.
Fig. 2 is that flyash, modification VAE emulsion, polypropylene fibre, staple fibre are on the synoptic diagram that affects of composite mortar ultimate compression strength.
Embodiment
Preparation modification VAE emulsion: (be purchased from the Nanjing permanent trade Co., Ltd of benefit glue toward common VAE emulsion, model is a watt gram VINNAPAS EP705K emulsion) the middle rosin toluene solution that accounts for modification VAE emulsion total mass 4% ~ 7% that adds, the mass percent of rosin is 3% ~ 5% in the rosin toluene solution.
Flyash, modification VAE emulsion, polypropylene fibre, these several components three of staple fibre are mixed, carry out orthogonal test research, when inquiring into several component compound use, main factor and the optimum mix amount separately, and influencing each other between each component during compound use.Test-results shows, when doping quantity of fly ash is 7%, the staple fibre volume is 0.8%, polypropylene fibre is 0.25%, when modification VAE latex was 7.5%, 28d ultimate compression strength reached 89.48MPa, improved 124.8% than benchmark mortar; The 28d folding strength reaches 43.39MPa, improves 90% than benchmark mortar.Show by orthogonal test, at polymer emulsion, after polypropylene fibre and staple fibre are compound, the extreme difference value of polymer emulsion is maximum, be principal element, the most obvious for the intensity effect of reinforced concrete, the action effect of polypropylene fibre and staple fibre weakens successively.
Blending staple fibre, polypropylene fibre and modification modification VAE latex are carried out positive quadraturing design test, and intensity is as shown in table 5 under composite mortar 3 days and the 28 days normal curing conditions.
Table 5 staple fibre, polypropylene fibre and modification VAE emulsion volume affect composite mortar strength
(the doping quantity of fly ash unification is 7 %)
When the staple fibre volume is 0.8%, polypropylene fibre is 0.25%, when modification VAE latex was 7.5%, 28d ultimate compression strength reached the climax, and folding strength is also higher.28d ultimate compression strength is 89.48MPa, improves 124.8% than benchmark mortar; The 28d folding strength is 14.06MPa, improves 90% than benchmark mortar.Blending performance transmission effects and the interfacial effect of three kinds of materials are closely related, have brought into play performance complement and performance transmission effects by the interface.Adulterant of different nature has all played thickening power in various degree to high performance composite mortar, this is because tiny polypropylene fibre specific surface area is large, in mortar, need to adsorb the parcel of a large amount of cement slurries and polymkeric substance, thick staple fibre then can play to the composite mortar component " support " effect, this all can make the viscosity increase of composite mortar mixture, and reduces the segregation excreting water phenomenon.Flyash, polymkeric substance, polypropylene fibre, staple fibre produce the MULTIPLE COMPOSITE effect, can improve simultaneously the multiple performance of composite mortar, thereby have produced excellent enhancing, ability is split in toughness reinforcing and resistance.This has demonstrated fully organic and inorganic, fibrous type and granule type, metal and nonmetal dual and MULTIPLE COMPOSITE effect.
Pass through orthogonal experiment, (extreme difference S refers to the poor of one group of total maximum value of data and minimum value to record the extreme difference of modification VAE emulsion, be used for dividing of factor significance level, the extreme difference of certain factor is maximum, the level that this factor is described changes the variation maximum that causes test-results) maximum, so modification VAE emulsion is exactly key factor.
According to sort the successively primary and secondary of factor of the size of extreme difference sequentially be: modification VAE emulsion〉polypropylene fibre〉staple fibre.
According to above analysis, the optimum mix of this test is: modification VAE latex 7.5%, polypropylene fibre 0.25%, staple fibre 0.8%, doping quantity of fly ash 7%.
Claims (5)
1. a modification VAE emulsion is characterized in that, comprises common VAE emulsion and the rosin toluene solution that accounts for modification VAE emulsion total mass 4% ~ 7%, and the mass percent of rosin is 3% ~ 5% in the described rosin toluene solution.
2. modification VAE emulsion as claimed in claim 1 is characterized in that, it is 2% ~ 4% light calcium carbonate or 3% ~ 5% superfine talcum powder that described modification VAE emulsion also contains mass percent.
3. the composite mortar that contains claim 1 or 2 described modification VAE emulsions, it is characterized in that, comprise cement, sand, water, water reducer, thickening material, flyash, modification VAE emulsion, polypropylene fibre and staple fibre, wherein, the mass ratio of Shui Ni ︰ Sha ︰ water is 1 ︰, 2 ︰ 0.45; The water reducer volume is 1.5% of composite mortar quality, and the thickening material volume is 1% of composite mortar weight; Doping quantity of fly ash is 4% ~ 12% of place of cement quality, and modification VAE emulsion volume is 2% ~ 9% of composite mortar quality, and polypropylene fiber is 0.05% ~ 0.25% of composite mortar quality; The staple fibre volume is 0.4% ~ 2.0% of composite mortar quality.
4. composite mortar as claimed in claim 3 is characterized in that, described doping quantity of fly ash is 10% of place of cement quality, and modification VAE emulsion volume is 5% of composite mortar quality, and polypropylene fiber is 0.2% of composite mortar quality; The staple fibre volume is 0.8% of composite mortar quality.
5. composite mortar as claimed in claim 3 is characterized in that, described doping quantity of fly ash is 7% of place of cement quality, and modification VAE emulsion volume is 7.5% of composite mortar quality, and polypropylene fiber is 0.25% of composite mortar quality; The staple fibre volume is 0.8% of composite mortar quality.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105884304A (en) * | 2016-04-15 | 2016-08-24 | 张家港英华材料科技有限公司 | Modified composition for fiber grid and compound grid |
| CN106833434A (en) * | 2015-12-07 | 2017-06-13 | 闫允璋 | A kind of modified EVA adhesive and preparation method thereof |
| CN108546546A (en) * | 2018-03-27 | 2018-09-18 | 安徽宝润环保节能建材有限公司 | A kind of viscous glutinous agent prepared by the emulsion modified rosin of VAE |
| CN108546529A (en) * | 2018-03-27 | 2018-09-18 | 安徽宝润环保节能建材有限公司 | A kind of method that cross-linking method is modified the viscous glutinous agent of VAE lotions preparation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113512A (en) * | 1994-06-17 | 1995-12-20 | 海城市建材化工厂 | Adhesive for construction and decoration and preparation thereof |
| CN1139551C (en) * | 2001-02-23 | 2004-02-25 | 重庆大学 | External insulating mortar and its preparing process |
-
2013
- 2013-01-21 CN CN2013100275616A patent/CN103073222A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113512A (en) * | 1994-06-17 | 1995-12-20 | 海城市建材化工厂 | Adhesive for construction and decoration and preparation thereof |
| CN1139551C (en) * | 2001-02-23 | 2004-02-25 | 重庆大学 | External insulating mortar and its preparing process |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106833434A (en) * | 2015-12-07 | 2017-06-13 | 闫允璋 | A kind of modified EVA adhesive and preparation method thereof |
| CN105884304A (en) * | 2016-04-15 | 2016-08-24 | 张家港英华材料科技有限公司 | Modified composition for fiber grid and compound grid |
| WO2017177750A1 (en) * | 2016-04-15 | 2017-10-19 | 张家港英华材料科技有限公司 | Modified composition of fiber grid and composite grid |
| CN105884304B (en) * | 2016-04-15 | 2018-03-02 | 张家港英华材料科技有限公司 | Fiber grid improved composition and composite grating |
| CN108546546A (en) * | 2018-03-27 | 2018-09-18 | 安徽宝润环保节能建材有限公司 | A kind of viscous glutinous agent prepared by the emulsion modified rosin of VAE |
| CN108546529A (en) * | 2018-03-27 | 2018-09-18 | 安徽宝润环保节能建材有限公司 | A kind of method that cross-linking method is modified the viscous glutinous agent of VAE lotions preparation |
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Application publication date: 20130501 |