CN106045419A - Elastic concrete - Google Patents
Elastic concrete Download PDFInfo
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- CN106045419A CN106045419A CN201610378029.2A CN201610378029A CN106045419A CN 106045419 A CN106045419 A CN 106045419A CN 201610378029 A CN201610378029 A CN 201610378029A CN 106045419 A CN106045419 A CN 106045419A
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- Prior art keywords
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- elastic concrete
- concrete
- elastic
- microlith
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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
- 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
- C04B28/04—Portland cements
-
- 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
- C04B2111/50—Flexible or elastic materials
- C04B2111/503—Elastic materials
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses elastic concrete used for solving the problem that the compressive strength of existing elastic concrete is lowered after a rubber material is added. According to the technical scheme, the elastic concrete is composed of, by weight, 150-180 parts of polyurethane, 20-40 parts of cement, 2-8 parts of gravel, 5-10 parts of powder filler, 10-20 parts of polytetrafluoroethylene, 3-8 parts of antioxidant and 2-12 parts of MgF2. The elastic concrete has excellent elasticity, compressive properties, abrasion resistance and oxidation resistance. Besides, expansion joints of a building have excellent free deformability and impact resistance when filled with the elastic concrete.
Description
Technical field
The present invention relates to a kind of building and stitch thin inserts, particularly to a kind of elastic concrete.
Background technology
Along with our materials flow economy develops rapidly, transport undertaking is advanced by leaps and bounds, the transport hub day such as highway, bridge and track
Benefit is improved and sound.Very important ingredient during wherein expansion joint is transport structure, such as in bridge construction, bridge
Expansion joint ensure bridge can Free Transform, and vehicle to be made passes through arranging can smooth out at expansion joint.But long-term practice
Showing, using concrete of the prior art to add to expansion joint, known, concrete has the advantages that comprcssive strength is big, but
Being its lacking toughness, rupture strength is low.Therefore bridge expanssion joint is in frequently carrying weight or frequently by under weight, surface
Be full of cracks easily occurs and damaged, cause builder to need continually and process is studied for a second time courses one has flunked at expansion joint.
Therefore patent publication No. is the compound additive that the patent of CN1699256 discloses a kind of high-strength elastic concrete,
It is mixed with concrete and inserts to the building expansion joints such as bridge, increase toughness, but when the rubber powder in additive is mixed
When measuring bigger, have a strong impact on building comprcssive strength at expansion joint, and its rubber grain volume is less than 6%, builds
Elastic force at expansion joint is little, is difficult to return to original flatness after being produced depression by weight deformation.
Based on modern people's demand high-quality to transport hub, need to propose the novel inserts at a kind of expansion joint.
Summary of the invention
The deficiency existed for prior art, the first object of the present invention is to provide a kind of elastic concrete, by adopting
Make it have under good elastic performance with polyurethane is standby, recycling sandstone, politef and MgF2And other components
The elastic concrete making the present invention has the compressive property of excellence.
For achieving the above object, the technical scheme is that a kind of elastic concrete, including following weight portion
Component:
The present invention is further: described polyurethanes is by aromatic polyisocyanate and PEPA polymerization
Become, and it passes through acetone as solvent.
The present invention is further: described sandstone includes microlith and fine sand, by weight percentage, described microlith 20%～
40%；Described fine sand 60%～80%.
The present invention is further: described microlith selects fillet microlith.
The present invention is further: described ground pigment includes Pulvis Talci and carbon fiber, in parts by weight: described Pulvis Talci
2～5 parts；Described carbon fiber 1～3 parts.
The present invention is further: described antioxidant is B4C and the mixture of magnesium metal.
Pass through technique scheme: aromatic polyisocyanate and PEPA can occur polyreaction to generate poly-ammonia
Ester, as the raw material of elastic concrete, replaces rubber grain as raw material, and polyurethane is a kind of macromolecular material, first, has
The restoration more excellent than rubber, it is possible to after ensureing that the elastic concrete of preparation is filled in expansion joint, building is positioned at expansion joint
Place has preferable deformability, and vehicle can be smoothly by expansion joint；Furthermore, the preferable wearability of polyurethane is with preferable
Weatherability so that elastic concrete has longer service life；Acetone is as solvent, it is possible to increase aromatic series polyisocyanic acid
Ester and the dissolubility of PEPA are many and wide at both acetone solvents intermolecular contacts so that reaction more thoroughly completely, carries
The utilization rate of high polyurethane reaction raw material；Meanwhile, acetone is again a kind of readily volatilized gas, when aromatic polyisocyanate and
After PEPA reaction completely, unnecessary acetone volatilizes in reaction dissolvent without being present in the polyurethane of synthesis as impurity
In solution, thus mix with other raw materials without interference with subsequent polyurethane.
The elastic concrete that sandstone advantageously forms has certain compressive resistance and hardness, uses fine sand and uses many
Amount, beneficially staff apply less stirring dynamics just can be uniform with cement or other raw material stirring by it, it is not necessary to
Strong vibrate, reach elastic concrete and be easy to the effect of preparation, and the elastic concrete containing fine sand has good
Density, inserts will not chap under external force weight behind expansion joint as inserting material.
Fillet microlith, relative to common microlith surface smoother, reduces and is being stirred mixing with raw materials such as cement
Time the friction that produces each other, the flowing between the most each component, reach the effect of mix homogeneously between each component, will not break simultaneously
Bad polyurethane or the immanent structure of ground pigment and external pattern so that each component has original characteristic.
Pulvis Talci and carbon fiber, as filler, can replace cement, in the case of reducing cement consumption, compare cement
Have the advantages that hardness is big, after replacing certain cement raw material, increase the hardness of elastic concrete, it is possible to keep out sharp objects
Collision；The most also having the feature that particle diameter is little, its specific surface area is big, under the consumption equal with cement, and between each component
Contact area big, surface free energy is high, it is possible between being attached in each component, improves the density of elastic concrete.
B4C and magnesium metal are present in elastic concrete as antioxidant, B4C can react generation with oxygen
B2O3, under certain hot conditions, magnesium can be with B simultaneously2O3Generate boric acid three magnesium and form the oxide film protection layer of densification, thus
Having blocked the polyurethane in air oxidation elastic concrete, the present invention uses flame gun to spray the elastic concrete after filling
Fire so that it is surface forms protective layer.
MgF2As a kind of wearability monocrystal, it is mixed and stirred for being processed into concrete, stirred with the raw material such as cement
Journey will not be dissolved, more will not react with other raw materials, be dispersed in elastic concrete with graininess.Expansion joint Elastic
During concrete deformation, MgF2Its free deformation will not be hindered, it is ensured that elastic concrete is as the characteristic of the inserts at expansion joint, instead
And due to MgF2It is present between sandstone or cement and makes sandstone or cement there is gap each other, reduce contact surface
Long-pending, though therefore deformation time sandstone or cement produce extruding, frictional force each other is smaller.
The present invention is further: also including anti-wear agent 4～8 parts, described anti-wear agent is polyformaldehyde.
Pass through technique scheme: the high comprehensive performance of polyformaldehyde, especially show anti-wear performance aspect, because it is with poly-
Urethane has certain compatibility, and both are mutually dissolved intermolecular after forming one can reacting, due to polyurethane
On ester group can attract each other with the hydrogen atom of polyformaldehyde, thus enhance the interaction force between molecule layer interface, strengthen
The bonding at interface, even if being conducive to elastic concrete frequently to be rubbed, also will not cause elasticity because of overtension between interface
Concrete wear and tear；The polyurethane of this programme further increases the wear-resisting of elastic concrete with the common effect of politef
Property, it is extended the service life of elastic concrete.
The present invention is further: also including bulking agent 2～5 parts, described bulking agent is maleic anhydride inoculated polypropylene.
By technique scheme: be a kind of reactive compatibilizer by maleic anhydride inoculated polypropylene, in the course of processing
In can with polyurethane reaction, between out of phase molecule layer interface formed chemical crosslinking point, bulking agent be compatible to polyurethane it
Between be present in elastic concrete system so that elastic concrete easily recovers after deforming upon, improve form stability,
Improve the mechanical property of elastic concrete.
The present invention is further: described aromatic polyisocyanate and PEPA use metering stirring, during reaction
Add acetone solvent, after reaction completely, stand and i.e. obtain polyurethane in 24～36 hours.
Pass through technique scheme: can be realized aromatic polyisocyanate and PEPA by electrical control
Automatic gauge, thus improve proportioning accuracy, promote the performance of the polyurethane of synthesis, reduce the waste of material so that preparation elasticity
The technique of concrete more high-efficiency environment friendly.
The present invention is further: in the range of using soda to regulate the pH to 3.5～6.0 of described acetone solvent.
By technique scheme: owing to synthesis aromatic polyisocyanate and PEPA are reversible reactions, by molten
The pH value of agent acetone regulates in acid range, it is possible to promote that aromatic polyisocyanate and PEPA forward are carried out, instead
Answer thing to level off to completely to react.
The elastic concrete of the present invention, has excellent elasticity, compressive property, scratch-resistant performance and antioxygenic property, with
Time when using the elastic concrete of the present invention to be filled in the expansion joint of building, building has the free deformation of excellence at expansion joint
Ability and impact resistant capability.In addition, can play collaborative between each raw material components of the elastic concrete synthesizing the present invention
Effect, a combination thereof potentiation is:
(1) make elastic concrete form stable and uniform system by cement, microlith, fillet microlith and polyurethanes, make
Must be filled in building expansion joint at time stable uniform；
(2) make elastic concrete be not easy to be worn by Pulvis Talci, carbon fiber, polyformaldehyde and politef, therefore build
Build thickness when being rubbed by weight for a long time at expansion joint will not reduce；
(3) B4C and magnesium metal and Oleum Verniciae fordii maleic anhydride inoculated polypropylene have been respectively increased non-oxidizability and the shape of elastic concrete
State stability, makes the mechanical property of elastic concrete reach optimal by both with above-mentioned synergism.
Detailed description of the invention
Embodiment 1～9 and comparative example 1 and 2 in the cement portland cement that all uses intensity to be 42.5R.Embodiment 1
～6 use aromatic polyisocyanate and PEPA as reaction raw materials, acetone is as solvent and uses sodium hydroxide molten
Liquid regulation solvent pH to 4.8, uses powder mixed powder blender to carry out metering stirring reaction and prepares polyurethane.
Embodiment 1
Each component of a kind of elastic concrete of form 1 embodiment 1 and parts by weight thereof
| Component | Number (part) | Component | Number (part) |
| Polyurethanes | 150 | Fine sand | 6 |
| Cement | 20 | Politef | 6 |
| Fillet microlith | 13 | / | / |
Embodiment 2
Each component of a kind of elastic concrete of form 2 embodiment 2 and parts by weight thereof
| Component | Number (part) | Component | Number (part) |
| Polyurethanes | 180 | Fine sand | 7 |
| Cement | 40 | Politef | 4 |
| Fillet microlith | 10 | MgF2 | 0.6 |
Embodiment 3
Each component of a kind of elastic concrete of form 3 embodiment 3 and parts by weight thereof
| Polyurethanes | 170 | Politef | 4.3 |
| Cement | 35 | MgF2 | 1.5 |
| Fillet microlith | 11 | Pulvis Talci | 4 |
| Fine sand | 6 | Carbon fiber | 3.2 |
Embodiment 4
Each component of a kind of elastic concrete of form 4 embodiment 4 and parts by weight thereof
| Component | Number (part) | Component | Number (part) |
| Polyurethanes | 172 | MgF2 | 0.6 |
| Cement | 33 | Pulvis Talci | 4.4 |
| Fillet microlith | 12 | Carbon fiber | 2.5 |
| Fine sand | 5 | Polyformaldehyde | 6 |
| Politef | 6.3 | / | / |
Embodiment 5
Each component of a kind of elastic concrete of form 5 embodiment 5 and parts by weight thereof
| Component | Number (part) | Component | Number (part) |
| Polyurethanes | 180 | MgF2 | 1.0 |
| Cement | 32 | Pulvis Talci | 4.8 |
| Fillet microlith | 10 | Carbon fiber | 2.8 |
| Fine sand | 7 | Polyformaldehyde | 6 |
| Politef | 5.6 | Maleic anhydride inoculated polypropylene | 3 |
Embodiment 6
Each component of a kind of elastic concrete of form 6 embodiment 6 and parts by weight thereof
| Component | Number (part) | Component | Number (part) |
| Polyurethanes | 180 | Pulvis Talci | 4 |
| Cement | 32 | Carbon fiber | 3.6 |
| Fillet microlith | 15 | Polyformaldehyde | 6 |
| Fine sand | 5 | Maleic anhydride inoculated polypropylene | 4.5 |
| Politef | 6.3 | B4C | 0.5 |
| MgF2 | 1.2 | Magnesium metal | 0.4 |
In embodiment 6, use flame gun that it is carried out 1200 degrees Celsius of flames after elastic concrete preparation and process.
Embodiment 7: take component same as in Example 6 and parts by weight prepare elastic concrete, use aromatic series many
Isocyanates and PEPA are as reaction raw materials, and acetone is as solvent and uses sodium hydroxide solution to regulate solvent pH to 9,
Use powder mixed powder blender to carry out metering stirring reaction and prepare polyurethane.
Embodiment 8: take component same as in Example 6 and parts by weight prepare elastic concrete, use aromatic series many
Isocyanates and PEPA are as reaction raw materials, and acetone is as solvent and uses sodium hydroxide solution regulation solvent pH extremely
3.5, use powder mixed powder blender to carry out metering stirring reaction and prepare polyurethane.
Embodiment 9: take component same as in Example 6 and parts by weight prepare elastic concrete, use aromatic series many
Isocyanates and PEPA are as reaction raw materials, and acetone is as solvent and uses sodium hydroxide solution to regulate solvent pH to 6,
Use powder mixed powder blender to carry out metering stirring reaction and prepare polyurethane.
Comparative example 1
Form 7 comparative example: each component of a kind of elastic concrete and parts by weight thereof
| Component | Number (part) | Component | Number (part) |
| Rubber | 200 | Fine sand | 7 |
| Cement | 30 | Politef | 4 |
| Fillet microlith | 10 | / | / |
Comparative example 2
Form 8 comparative example: each component of a kind of elastic concrete and parts by weight thereof
| Component | Number (part) | Component | Number (part) |
| Polyurethanes | 160 | Common sandstone | 7 |
| Cement | 80 | / | / |
Product property characterizes: prepare formula by above-described embodiment and comparative example and elastic concrete that method obtains respectively
Take 20 block concrete samples, measure its elastic modelling quantity, comprcssive strength and abrasion-resistant intensity, record its meansigma methods and its standard
Difference.Result is as shown in table 9,
Form 9: the performance parameter of elastic concrete
Can be shown that by above-mentioned data the elastic concrete prepared by the present invention has preferable elastic performance, crushing resistance
Energy and anti-wear performance, the uniformity of its performance is preferable simultaneously.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned enforcement
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications are also
Should be regarded as protection scope of the present invention.
Claims (10)
1. an elastic concrete, it is characterised in that include the component of following weight portion:
Polyurethanes 150 ~ 180 parts；
Cement 20 ~ 40 parts；
Sandstone 8 ~ 20 parts；
Ground pigment 5 ~ 10 parts；
Politef 3 ~ 8 parts；
Antioxidant 0.2 ~ 1.2 part；
MgF20.6 ~ 1.5 part.
A kind of elastic concrete the most according to claim 1, it is characterised in that described polyurethanes is many by aromatic series
Isocyanates and PEPA are polymerized, and it passes through acetone as solvent.
A kind of elastic concrete the most according to claim 2, it is characterised in that described sandstone includes microlith and fine sand, with
Percentage by weight meter, described microlith 20% ~ 40%；Described fine sand 60% ~ 80%.
A kind of elastic concrete the most according to claim 3, it is characterised in that described microlith selects fillet microlith.
A kind of elastic concrete the most according to claim 4, it is characterised in that described ground pigment include Pulvis Talci and
Carbon fiber, in parts by weight: described Pulvis Talci 2 ~ 5 parts；1 ~ 3 part of described carbon fiber.
A kind of elastic concrete the most according to claim 5, it is characterised in that described antioxidant is B4C and magnesium metal
Mixture.
A kind of elastic concrete the most according to claim 1, it is characterised in that also include anti-wear agent 4 ~ 8 parts, described resistance to
Grinding agent is polyformaldehyde.
A kind of elastic concrete the most according to claim 1, it is characterised in that also include bulking agent 2 ~ 5 parts, described increasing
Appearance agent is maleic anhydride inoculated polypropylene.
A kind of elastic concrete the most according to claim 2, it is characterised in that described aromatic polyisocyanate and polyester
Polyhydric alcohol uses metering stirring, adds acetone solvent, after reaction completely, stand and i.e. obtain polyurethane in 24 ~ 36 hours during reaction.
A kind of elastic concrete the most according to claim 9, it is characterised in that use soda to regulate described acetone solvent
PH to 3.5 ~ 6.0 in the range of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610378029.2A CN106045419B (en) | 2016-05-31 | 2016-05-31 | A kind of elastic concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610378029.2A CN106045419B (en) | 2016-05-31 | 2016-05-31 | A kind of elastic concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106045419A true CN106045419A (en) | 2016-10-26 |
| CN106045419B CN106045419B (en) | 2017-11-14 |
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| CN201610378029.2A Expired - Fee Related CN106045419B (en) | 2016-05-31 | 2016-05-31 | A kind of elastic concrete |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746988A (en) * | 2016-12-14 | 2017-05-31 | 东北林业大学 | Polyurethane cement composite with pressure-sensitive character and its preparation method and application |
| CN109437764A (en) * | 2018-12-20 | 2019-03-08 | 江苏合谷建筑设计有限公司 | A kind of feed preparation process and its special agitating apparatus of anticorrosive concrete structure |
| CN115849809A (en) * | 2022-11-30 | 2023-03-28 | 常州市水利规划设计院有限公司 | Compression-resistant pervious concrete and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100113832A (en) * | 2009-04-14 | 2010-10-22 | 진도화성주식회사 | Elastic floor materials for bicycle road |
| CN102432330A (en) * | 2011-09-16 | 2012-05-02 | 上海浦莲预拌混凝土有限公司 | Earthquake-resistant and pressure-resistant concrete and preparation method thereof |
| CN103936367A (en) * | 2014-02-27 | 2014-07-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Heat-sensitive material modified concrete, prefabricated part of modified concrete and preparation method for cast-in-place of modified concrete |
-
2016
- 2016-05-31 CN CN201610378029.2A patent/CN106045419B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100113832A (en) * | 2009-04-14 | 2010-10-22 | 진도화성주식회사 | Elastic floor materials for bicycle road |
| CN102432330A (en) * | 2011-09-16 | 2012-05-02 | 上海浦莲预拌混凝土有限公司 | Earthquake-resistant and pressure-resistant concrete and preparation method thereof |
| CN103936367A (en) * | 2014-02-27 | 2014-07-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Heat-sensitive material modified concrete, prefabricated part of modified concrete and preparation method for cast-in-place of modified concrete |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746988A (en) * | 2016-12-14 | 2017-05-31 | 东北林业大学 | Polyurethane cement composite with pressure-sensitive character and its preparation method and application |
| CN109437764A (en) * | 2018-12-20 | 2019-03-08 | 江苏合谷建筑设计有限公司 | A kind of feed preparation process and its special agitating apparatus of anticorrosive concrete structure |
| CN109437764B (en) * | 2018-12-20 | 2019-10-22 | 苏州清溪环保科技有限公司 | A kind of feed preparation process and its special agitating apparatus of anticorrosive concrete structure |
| CN115849809A (en) * | 2022-11-30 | 2023-03-28 | 常州市水利规划设计院有限公司 | Compression-resistant pervious concrete and preparation method thereof |
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