CN105948549A - Large-water-absorption-rate aggregate surface treatment agent - Google Patents
Large-water-absorption-rate aggregate surface treatment agent Download PDFInfo
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- CN105948549A CN105948549A CN201610266879.3A CN201610266879A CN105948549A CN 105948549 A CN105948549 A CN 105948549A CN 201610266879 A CN201610266879 A CN 201610266879A CN 105948549 A CN105948549 A CN 105948549A
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- absorption rate
- water absorption
- aggregate
- inorganic agent
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1062—Metals
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Abstract
The invention relates to a large-water-absorption-rate aggregate surface treatment agent, and belongs to the technical field of high performance concrete; the surface treatment agent is composed of the components by the weight percentage: 10-30% of silica fume, 10-30% of a limestone powder, 10-30% of ultra-fine fly ash, 10-20% of silane, 10-20% of polyvinyl alcohol, 5-10% of a waterproof alloy powder, and 1-5% of a polycarboxylate water reducing agent. The large-water-absorption-rate aggregate surface treatment agent is easy to use; while the water absorption rate of a large-water-absorption-rate aggregate is reduced, the combination of the aggregate and a cement paste in concrete is not affected, the performance of the large-water-absorption-rate aggregate is improved, and the application of the large-water-absorption-rate aggregate is promoted.
Description
Technical field
The present invention relates to a kind of aggregate surface inorganic agent, at one big water absorption rate aggregate surface
Reason agent, belongs to technology of high performance concrete field.
Background technology
Along with the infrastructure constructions such as domestic building, water conservancy, traffic and country " band one tunnel " war
Propelling slightly, reaches 50 billion cubic meters as the most large civil engineering material concrete amount whole world,
And aggregate accounts for more than the 70% of weight concrete, aggregate consumption is increasing, has in some place
Use the aggregate that water absorption rate is bigger.
The water absorption rate of aggregate increases, the resistance to compression of concrete, rupture strength step-down, frost resistance, impermeability,
Deicer-scaling resistance, anti-carbonation properties are deteriorated, and aggregate water absorption rate is more than 1%, the frost resistance of concrete, anti-
Deicer-scaling, anti-carbonation properties significantly reduce.Use the concrete of granite preparation, when aggregate absorbs water
When rate is increased to 1.5% by 1.0%, concrete 28d comprcssive strength is down to 54.8MPa by 60MPa；Warp
Crossing after 30 salt freeze circulation, concrete denudation is by 210g/m2Increase to 580g/m2；Concrete chlorine
Ionic diffusion coefficient is by 2.43 × 10-9cm2/ s increases to 3.24 × 10-9cm2/s.This is researched and analysed and thinks
The weak link of concrete antifreezing is mainly at the boundary layer of aggregate Yu hardening of cement slurry.The water suction of aggregate
Rate increases so that aquation during boundary layer cement slurry aquation is not enough, makes concrete produce on boundary layer
Raw weak link, and cause destruction.
At present, the processing method for big water absorption rate aggregate mainly has macromolecule surface film forming and cement mortar
Surface is wrapped up in deposited.Macromolecule surface film forming uses macromolecular solution to soak big water absorption rate aggregate exactly so that
Aggregate surface forms a floor height molecular film, thus reduces aggregate water absorption rate；Cement mortar surface is wrapped up in and is just applied
It is to wrap up in deposited one layer of cement mortar, the micro-pore on filler aggregate surface at big water absorption rate aggregate surface, reduces
Aggregate water absorption rate.Abovementioned technology depositing more or less in big water absorption rate aggregate actual process
In some drawbacks, although macromolecule surface film forming can be greatly lowered aggregate water absorption rate, but process
After aggregate can reduce with the adhesion of cement slurry in concrete；Cement mortar surface is wrapped up in and is applied bone after process
Material water absorption rate reduces less.
Summary of the invention
The technical problem to be solved is to provide and a kind of is reducing big water absorption rate aggregate water absorption rate
Meanwhile, do not affect aggregate and the combination of cement slurry in concrete, improve big water absorption rate aggregate concrete
The aggregate surface inorganic agent of performance, promote the application of big water absorption rate aggregate.
For solving above-mentioned technical problem, the invention provides a kind of big water absorption rate aggregate surface inorganic agent,
It is by silicon ash 10-30%, agstone 10-30%, superfined flyash 10-30%, silane 10-20%,
Polyvinyl alcohol 10-20%, methanol bronze 5-10%, polycarboxylate water-reducer 1-5% composition, described percentage
Number is percetage by weight.
Term used in the present invention " silicon ash " is when smelting ferrosilicon or industrial silicon, passes through
After the silicon vapor oxidation that flue is discharged, collect through dust-precipitator that obtain is main with amorphous silica
The product of composition.A kind of big water absorption rate aggregate surface inorganic agent silicon ash of the present invention is with amorphous titanium dioxide
Silicone content is advisable more than 90%.
Term used in the present invention " agstone " is with the limestone of certain purity as raw material, warp
Grinding is to the pulverulent material specifying fineness.A kind of big water absorption rate aggregate surface inorganic agent Calx of the present invention
Stone powder is advisable more than 80% with calcium carbonate content.
Term used in the present invention " superfined flyash " is sorting and grinding processing superfined flyash.
A kind of big water absorption rate aggregate surface inorganic agent superfined flyash of the present invention is more than with specific surface area
1000m2/ kg is advisable.
Term used in the present invention " silane " can be divided into again monosilane and Disilicoethane.The present invention is a kind of
Big water absorption rate aggregate surface inorganic agent is advisable with monosilane, is that inorganic agent reduces bone in aggregate surface film forming
One of main source of material water absorption rate.
Term used in the present invention " polyvinyl alcohol " is a kind of high-molecular organic material.The present invention one
Plant big water absorption rate aggregate surface inorganic agent to be advisable for 17-24 with degree of polymerization scope, be that inorganic agent is at aggregate
Surface filming reduces one of main source of aggregate water absorption rate.
Term used in the present invention " methanol bronze " is with silicon dioxide, magnesium oxide, aluminium oxide
And silicon-aluminum-magnesium compound is base material, rolling through High Temperature High Pressure injection and be combined into thin slice superimposed layer, utilization is received
Rice vapour deposition and splashing film coating manufacturing process, and through the inorganic hydrophobic powder body material of grinding, be
A kind of waterproof material.A kind of big water absorption rate aggregate surface inorganic agent of the present invention uses methanol bronze
Hydrophobic interaction reduce aggregate water absorption rate.
Term used in the present invention " polycarboxylate water-reducer " is a kind of high-performance water reducing agent, is also one
Plant powder body dispersant with high efficiency in water.A kind of big water absorption rate aggregate surface inorganic agent of the present invention uses poly-
The use of carboxylic acid water reducer dispersion powder, beneficially inorganic agent.
In some specific embodiments of the present invention, silicon ash of the present invention is amorphous silica
The content silicon ash more than 90%；Its content is preferably 15-25%.
In some specific embodiments of the present invention, agstone of the present invention is calcium carbonate content
Agstone more than 80%；Its content is preferably 15-25%.
In some specific embodiments of the present invention, superfined flyash of the present invention is specific surface area
More than 1000m2The superfined flyash of/kg；Its content is preferably 15-25%.
In some specific embodiments of the present invention, silane of the present invention is selected from monosilane or second silicon
Alkane；More preferably monosilane；Its content is preferably 13-17%.
In some specific embodiments of the present invention, polyvinyl alcohol of the present invention is degree of polymerization scope
Polyvinyl alcohol for 17-24；Its content is preferably 12-16%.
In some specific embodiments of the present invention, methanol bronze content of the present invention is preferably
6-8%.
In some specific embodiments of the present invention, polycarboxylate water-reducer of the present invention is water-reducing rate
Polycarboxylate water-reducer more than 30%；Its content is preferably 2-3%.
One of the present invention big water absorption rate aggregate surface inorganic agent is reducing big water absorption rate aggregate water absorption rate
While, do not affect aggregate and the combination of cement slurry in concrete, improve big water absorption rate aggregate coagulation
The performance of soil, promotes the application of big water absorption rate aggregate.
Below by detailed description of the invention, the present invention is described further.The present invention can inhale according to big
The actual water suction situation of water rate aggregate suitably adjusts formula, carries out according to the method described in following example
Operation, makes the big water absorption rate aggregate surface inorganic agent meeting performance requirement.
Detailed description of the invention
Primary raw material and equipment
Big water absorption rate aggregate: the saturation plane dry water absorption rate commercially available prod more than 3%.
Silicon ash: the CABR-GH that Jian Yan the Kunlun company limited sells, the content of amorphous silica
93%.
Agstone: the Xing Zhou construction engineering corporation, Ltd that bestows favour produces and sells, calcium carbonate content 82%.
Superfined flyash: the CABR-CFA that Jian Yan the Kunlun company limited sells, specific surface area 1200m2/kg。
Silane: the CABR-GW3 that Jian Yan the Kunlun company limited sells.
Polyvinyl alcohol: the CABR-PVA2 that Jian Yan the Kunlun company limited sells, the degree of polymerization 20.
Methanol bronze: Henan Ke Liao new high-tech material company limited produces.
Polycarboxylate water-reducer: the KLS3 that Jian Yan the Kunlun company limited sells, water-reducing rate 35%.
Saturation plane dry water absorption rate die trial: the product that the sky, Beijing auspicious sign commerce trading center sells.
Method of testing
Survey according to " regular concrete sand, stone quality and test method standard " (JGJ 52-2006)
The examination dry water absorption rate of aggregate saturation plane.
According to " standard for test methods of mechanical properties of ordinary concrete " (GB/T 50081-2002) standard
The comprcssive strength of the aggregate concrete batching after test processes.
Blank example
By the most treated for the big water absorption rate aggregate of 1000g, directly use " regular concrete sand, stone
Quality and test method standard " in (JGJ 52-2006) saturation plane do moisture content test method and test it
The dry water absorption rate of saturation plane, is denoted as LBlank。
Comparative example 1
Soak 1000g big water absorption rate aggregate with the solution of silane of 6% concentration, take out the aggregate after infiltration,
Natural drying, tests the dry water absorption rate of its saturation plane, is denoted as LTo 1。
Comparative example 2
Wrap up in deposited one layer of cement mortar, natural drying at 1000g big water absorption rate aggregate surface, test it saturated
The dry water absorption rate in face, is denoted as LTo 2。
Embodiment 1
By the silicon ash of 20g, the agstone of 20g, the superfined flyash of 20g, the silane of 15g, 15g
Polyvinyl alcohol, the methanol bronze of 5g, 2g polycarboxylate water-reducer mixing, make big water absorption rate bone
Material surface conditioning agent, adds the water of 100g, makes inorganic agent slurry, infiltrates 1000g big water absorption rate bone
Material, takes out the aggregate after infiltration, natural drying, tests the dry water absorption rate of its saturation plane, be denoted as L1。
Embodiment 2
By the silicon ash of 10g, the agstone of 30g, the superfined flyash of 30g, the silane of 10g, 10g
Polyvinyl alcohol, the methanol bronze of 5g, 5g polycarboxylate water-reducer mixing, make big water absorption rate bone
Material surface conditioning agent, adds the water of 100g, makes inorganic agent slurry, infiltrates 1000g big water absorption rate bone
Material, takes out the aggregate after infiltration, natural drying, tests the dry water absorption rate of its saturation plane, be denoted as L2。
Embodiment 3
By the silicon ash of 29g, the agstone of 10g, the superfined flyash of 10g, the silane of 10g, 20g
Polyvinyl alcohol, the methanol bronze of 10g, 1g polycarboxylate water-reducer mixing, make big water absorption rate
Aggregate surface inorganic agent, adds the water of 100g, makes inorganic agent slurry, infiltrates the big water absorption rate of 1000g
Aggregate, takes out the aggregate natural drying after infiltration, tests the dry water absorption rate of its saturation plane, be denoted as L3。
Embodiment 4
By the silicon ash of 30g, the agstone of 30g, the superfined flyash of 10g, the silane of 10g, 10g
Polyvinyl alcohol, the methanol bronze of 5g, 5g polycarboxylate water-reducer mixing, make big water absorption rate bone
Material surface conditioning agent, adds the water of 100g, makes inorganic agent slurry, infiltrates 1000g big water absorption rate bone
Material, takes out the aggregate after infiltration, natural drying, tests the dry water absorption rate of its saturation plane, be denoted as L4。
Embodiment 5
By the silicon ash of 25g, the agstone of 25g, the superfined flyash of 15g, the silane of 13g, 12g
Polyvinyl alcohol, the methanol bronze of 8g, 2g polycarboxylate water-reducer mixing, make big water absorption rate bone
Material surface conditioning agent, adds the water of 100g, makes inorganic agent slurry, infiltrates 1000g big water absorption rate bone
Material, takes out the aggregate after infiltration, natural drying, tests the dry water absorption rate of its saturation plane, be denoted as L5。
Embodiment 6
By the silicon ash of 18g, the agstone of 15g, the superfined flyash of 25g, the silane of 17g, 16g
Polyvinyl alcohol, the methanol bronze of 6g, 3g polycarboxylate water-reducer mixing, make big water absorption rate bone
Material surface conditioning agent, adds the water of 100g, makes inorganic agent slurry, infiltrates 1000g aggregate, takes out
Aggregate natural drying after infiltration, tests the dry water absorption rate of its saturation plane, is denoted as L6。
Embodiment 7
By the silicon ash of 15g, the agstone of 25g, the superfined flyash of 25g, the silane of 12g, 15g
Polyvinyl alcohol, the methanol bronze of 6g, 2g polycarboxylate water-reducer mixing, make big water absorption rate bone
Material surface conditioning agent, adds the water of 100g, makes inorganic agent slurry, infiltrates 1000g aggregate, takes out
Aggregate natural drying after infiltration, tests the dry water absorption rate of its saturation plane, is denoted as L7。
By " regular concrete sand, stone quality and test method standard " (JGJ 52-2006) bone
Material saturation plane is done moisture content test method and is tested each dry water absorption rate of aggregate saturation plane, by " common coagulation
Soil mechanics method for testing performance standard " (GB/T 50081-2002) standard testing process after aggregate join
The comprcssive strength of concrete processed, respectively LBlank, LTo 1, LTo 2And L1-L7, as shown in table 1:
Table 1 saturation plane dry water absorption rate LBlank, LTo 1, LTo 2And L1-L7Experimental data
The present invention is compared with the processing method of the most common big water absorption rate aggregate, by having in proportioning
Machine macromolecule filming material and inorganic ultrafine powder body combine, and both can ensure that the place of big water absorption rate aggregate
Reason effect, is greatly lowered the water absorption rate of aggregate, can guarantee that again aggregate surface is not because of macromolecule filming
The concrete performance causing preparation declines.
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme
And unrestricted, although the present invention being described in detail with reference to example, the ordinary skill people of this area
Member should be appreciated that and can modify technical scheme or equivalent, without deviating from
The spirit and scope of technical solution of the present invention, it all should be contained in the middle of scope of the presently claimed invention.
Claims (9)
1. a big water absorption rate aggregate surface inorganic agent, it is characterised in that: this surface conditioning agent is by silicon ash
10-30%, agstone 10-30%, superfined flyash 10-30%, silane 10-20%, polyvinyl alcohol
10-20%, methanol bronze 5-10%, polycarboxylate water-reducer 1-5% composition, described percent is weight
Percent.
2. big water absorption rate aggregate surface inorganic agent as claimed in claim 1, it is characterised in that: described
In silicon ash, the content of amorphous silica is more than 90%, and the content of described silicon ash is 15-25%.
3. big water absorption rate aggregate surface inorganic agent as claimed in claim 1, it is characterised in that: described
The superfine powder collected when silicon ash is smelting ferrosilicon or industrial silicon.
4. big water absorption rate aggregate surface inorganic agent as claimed in claim 1, it is characterised in that: described
In agstone, the content of calcium carbonate is more than 80%, and the content of described agstone is 15-25%.
5. big water absorption rate aggregate surface inorganic agent as claimed in claim 1, it is characterised in that: described
Superfined flyash is the superfined flyash processed without grinding, directly burn till, and specific surface area is more than
1000m2/ kg, its content is 15-25%.
6. big water absorption rate aggregate surface inorganic agent as claimed in claim 1, it is characterised in that: described
Silane is monosilane or Disilicoethane, and its content is 13-17%.
7. big water absorption rate aggregate surface inorganic agent as claimed in claim 1, it is characterised in that: described
The degree of polymerization scope of polyvinyl alcohol is 17-24, and its content is 12-16%.
8. big water absorption rate aggregate surface inorganic agent as claimed in claim 1, it is characterised in that: described
Methanol bronze be through high-temperature injection, roll, the silicon dioxide of grinding, magnesium oxide, aluminium oxide
And/or silicon-aluminum-magnesium compound, its content is 6-8%.
9. big water absorption rate aggregate surface inorganic agent as claimed in claim 1, it is characterised in that: described
Polycarboxylate water-reducer is the polycarboxylate water-reducer that water-reducing rate is more than 30%, and its content is 2-3%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108821625A (en) * | 2018-06-07 | 2018-11-16 | 东南大学 | A kind of method of modifying of construction refuse regenerated fine aggregate |
| CN111847944A (en) * | 2020-07-23 | 2020-10-30 | 中国建筑科学研究院有限公司 | Ferrochromium slag for concrete aggregate and preparation method thereof |
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Cited By (2)
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| CN111847944A (en) * | 2020-07-23 | 2020-10-30 | 中国建筑科学研究院有限公司 | Ferrochromium slag for concrete aggregate and preparation method thereof |
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| CN105948549B (en) | 2017-10-24 |
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