CN109503058A - A kind of rubber concrete of modification - Google Patents
A kind of rubber concrete of modification Download PDFInfo
- Publication number
- CN109503058A CN109503058A CN201710826181.7A CN201710826181A CN109503058A CN 109503058 A CN109503058 A CN 109503058A CN 201710826181 A CN201710826181 A CN 201710826181A CN 109503058 A CN109503058 A CN 109503058A
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- China
- Prior art keywords
- rubber
- concrete
- water
- sand
- cement
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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
- 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
Abstract
A kind of rubber concrete of modification, cement: water: sand: stone: modified rubber grain=430:151.7:593.75-531.25:1160:13.76-41.3；The preparation method of the rubber grain of the modification is: 1. rubber grain being immersed in tap water after 7-10 days and is taken out；2. accelerator and cement are uniformly mixed according to the ratio of 1:4；3. 2. the mixing of gained powder, stirring to the mixture slump are 6-10 for 1. rubber grain and step that step is moistened；4. conserving in water after 3. compound particles that step is obtained are dry, need to dry to particle surface in use, taking out in canescence.The intensity of the concrete reduces amplitude and reduces, compared with benchmark rubber concrete, intensity is significantly improved compared with benchmark normal concrete intensity.
Description
Technical field
The invention belongs to building material technical fields, more particularly to a kind of rubber concrete of modification.
Background technique
In recent years, the yield of waste tire flies violent as the owning amount of the high speed development of Chinese Automobile Industry ', automobile is prominent
Increase and increases significantly.Waste tire has very strong heat resistance, mechanical resistance, and is difficult to degrade, and decades will not all disappear naturally
It loses, is known as " black pollution ", causes larger threat to environment.Waste tire is a kind of regenerated resources, and recycling is sharp again
With not only economizing on resources but also can be reduced pollution, considerable economic benefit can be also created.
Rubber concrete has that good crack resistance, good toughness, durability be good, quality as a kind of compound concrete material
Gently, the advantages that shock resistance is good.But as can be seen that the experimental data of rubber concrete from the more research that domestic and foreign scholars carry out
It is very discrete, it is sometimes even conflicting, such as Ali and Fattuhi and Clark and Liu Feng, woods phoenix orchid etc. think per capita
The partial size of rubber is bigger, and the compression strength fall of rubber concrete is smaller；And Khatib, Bayomy, Topcu and Kew
H.Y. research conclusion is exactly the opposite with it.The Zhang Haibo of Institutes Of Technology Of He'nan then thinks under lower substitution amount, the rubber of 100 mesh
The compression strength of concrete is higher than the rubber concrete of 5 mesh, after reaching certain substitution amount, the size relation of the two compression strength
It exchanges.It traces it to its cause, it should be caused by when making rubber concrete, rubber grain is unevenly distributed.
When to rubber grain sample detection, the bulk density of 5-20 mesh rubber grain is in 1.81g/cm3-1.83g/
cm3, it is slightly larger than water, but due to containing gas in particle, and rubber grain belongs to hydrophobicity elastic gel synthetic material, in water
In suspension and floating state；And sand, stone density are much larger than water, sink in water.Rubber grain is floated, is tied in whipping process
It sticks together, and concrete binding leakiness, inside sample after shaping, rubber grain is unevenly distributed, to cause rubber coagulation
Soil mechanics performance declines to a great extent compared with normal concrete and test data is discrete larger.Therefore rubber in rubber concrete is solved
Grain be unevenly distributed be numerous scholars research new hot spot.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of rubber concrete of modification, the concrete
Intensity compared with benchmark normal concrete intensity, reduce amplitude reduce, compared with benchmark rubber concrete, intensity is obviously mentioned
It is high.
As above design, the technical scheme is that a kind of rubber concrete of modification, it is characterised in that: cement: water:
Sand: stone: modified rubber grain=430:151.7:593.75-531.25:1160:13.76-41.3；The rubber of the modification
The preparation method of glue particle is:
It is taken out 1. rubber grain was immersed in tap water after 7-10 days；
2. accelerator and cement are uniformly mixed according to the ratio of 1:4；
3. 2. the mixing of gained powder, stirring to the mixture slump are 6-for 1. rubber grain and step that step is moistened
10；
4. conserving in water after 3. compound particles that step is obtained are dry, need to dry in use, taking out to particle
Surface is in canescence.
Above-mentioned cement selection ordinary portland cement P.O 42.5.
Above-mentioned sand is middle sand, maximum particle diameter 5mm, fineness modulus 2.53, apparent density 2543kg/m3。
Above-mentioned stone is graduation two limestone, and two kinds of partial size 5-10mm, 10-20mm, the ratio between the two parameter is 4:6, table
See density 2732kg/m3。
Above-mentioned rubber grain partial size is 3-4mm, apparent density 1118kg/m3。
Above-mentioned accelerator is 782-3 high-efficiency cement accelerator.
Above-mentioned cement: water: sand: stone: rubber grain=430:151.7:593.75:1160:13.76.
Above-mentioned cement: water: sand: stone: rubber grain=430:151.7:562.5:1160:27.5.
Above-mentioned cement: water: sand: stone: rubber grain=430:151.7:531.25:1160:41.3.
The step of rubber grain preparation method of above-mentioned modification 1. in the additive amount of tap water be 2 times of rubber volume.
The step of rubber grain preparation method of above-mentioned modification 4. in when conserving in water, stir particles every 12 hours
Once.
The present invention has the advantage that and good effect:
(1) rubber grain is after the modified pretreatment of petrification, and surface is wrapped up by cement admixture, compared with General Purpose Rubber particle
Quality increases, and density increases, and is not easy to float and avoid the hydrophobicity of rubber material in water and knot sticks together phenomenon, therefore rubber
Grain is uniformly distributed in concrete.
(2) by the section observation after splitting, through the modified rubber concrete of petrification compared with General Purpose Rubber concrete rubber
The phenomenon that glue distribution of particles is more uniform, sticks together without obviously knot with particle floating, it is closely knit in conjunction with concrete other materials.
(3) test result shows that petrification modification can significantly improve the compression strength and split tensile strength of rubber concrete,
In a certain range, rubber grain incorporation is more, and effect is more obvious.
(4) in freeze thawing resistance test, the freezing and thawing performance of General Purpose Rubber concrete is significantly better than normal concrete and petrochemical industry
The integrality of method rubber concrete, test specimen appearance is best；When carrying out dynamic modulus of elasticity test, normal concrete, rubber coagulation
Soil, petrification rubber concrete, internal degradation are gradually accelerated.
Specific embodiment
Technical solution of the present invention is further discussed in detail with reference to embodiments, but protection scope of the present invention
It is not limited thereto.
Term is explained: 1, rubber concrete: rubber grain (or powder or other shapes) is isometric as a kind of admixture
Part replaces sand to be added to manufactured a kind of new concrete in cement concrete；2, benchmark normal concrete: it is not spiked with rubber
The normal concrete of particle；3, benchmark rubber concrete: rubber grain without any processing rubber concrete；4, modified rubber
Glue concrete: rubber grain passes through the rubber concrete being modified.
Material specification: cement selection selects ordinary portland cement P.O 42.5, qualified；Sand is middle sand, maximum grain
Diameter is 5mm, fineness modulus 2.53, apparent density 2543kg/m3, continuous grading, apparent density 2534kg/m3；Stone is two
Gradation limestone, two kinds of partial size 5-10mm, 10-20mm, the ratio between the two parameter are 4:6, apparent density 2732kg/m3, gradation
It is qualified；Rubber grain partial size 3-4mm, apparent density 1118kg/m3。
In order to improve the workability of concrete, suitable water-reducing agent can be added in the construction process, this is the public affairs of this field
Know common sense.The water-reducing agent added in following embodiments is tea series high-efficiency water-reducing agent.
The method of modifying embodiment of rubber grain
Embodiment 1
A kind of method of modifying of rubber grain comprising following steps:
1) it in parts by weight, takes 7 parts of rubber grains to be immersed in tap water to take out after 7-10 days, until the rubber impregnated
Grain sinks completely, and bright yellow is presented in particle surface bubble-free, the tap water of immersion, waterborne to distribute pungent smell；
2) in parts by weight, take 1 part of accelerator, 4 parts of cement mixings uniform；
3) rubber grain moistened step 1) and 2) gained powder mixing, stir 3min, add suitable water, then stir
5min is mixed, until the mixture slump is 6-10；
4) mixture is uniformly spread out in clean water mire, is sticked together so that particle is not tied, every particle is wanted using perching knife
It separates, after particle drying, weeds out undesired impurities, after conserving 3 days in water, need to dry in use, taking out to particle table
Face is in canescence.Then concrete mix can be mixed.
The step of rubber grain preparation method of above-mentioned modification 1. in the additive amount of tap water be 2 times of rubber volume.
The step of rubber grain preparation method of above-mentioned modification 4. in when conserving in water, stir particles every 12 hours
Once.
Embodiment 2
Modified rubber concrete: by rubber grain by 5% isometric substitution part sand, each raw material weight match ratio are as follows: water
Mud: water: sand: stone: rubber grain: water-reducing agent=430:151.7:593.75:1160:13.76:7.74, and the rubber
Particle is modified by 1 method of embodiment.
Mix and stir technique:
1) stone, cement, sand, rubber grain, water-reducing agent and water are weighed according to match ratio (wherein the quality of rubber grain is
The quality of rubber grain before handling；
2) first stone is added in mix pot, then rubber grain is admixed in cement and is added in mix pot together, then plus
Enter water-reducing agent and sand, starting mix pot stirs 10s, is eventually adding water mix 2min30s.
Embodiment 3
Modified rubber concrete: by rubber grain by 10% isometric substitution part sand, each raw material weight match ratio is water
Mud: water: sand: stone: rubber grain: water-reducing agent=430:151.7:562.5:1160:27.5:7.74, and the rubber
Grain is modified by 1 method of embodiment.Technique is mixed and stirred referring to embodiment 2.
Embodiment 4
Modified rubber concrete: by rubber grain by 15% isometric substitution part sand, each raw material weight match ratio is water
Mud: water: sand: stone: rubber grain: water-reducing agent=430:151.7:531.25:1160:41.3:7.74, and the rubber
Grain is modified by 1 method of embodiment.Technique is mixed and stirred referring to embodiment 2.
The performance of benchmark normal concrete, benchmark rubber concrete is tested below:
One, 1-benchmark of reference examples normal concrete:
Each raw material weight match ratio are as follows: cement: water: sand: stone: water-reducing agent=430:151.7:625:1160:7.74.
Mix and stir technique:
1) stone, cement, sand, water-reducing agent and water are weighed according to match ratio；
2) first stone is added in mix pot, then cement, water-reducing agent is added in mix pot, sand is then added, starting is mixed
It closes pot and stirs 10s, be eventually adding water mix 2min30s.
Two, 2,3,4-benchmark rubber concrete of reference examples:
1, reference examples 2
Benchmark rubber concrete: rubber grain replaces part sand by 5% in equal volume, each raw material weight match ratio are as follows: cement:
Water: sand: stone: rubber grain: water-reducing agent=430:151.7:593.75:1160:13.76:7.74, and the rubber grain
Without any processing.
Mix and stir technique:
1) stone, cement, sand, rubber grain, water-reducing agent and water are weighed according to match ratio；
2) first stone is added in mix pot, then rubber grain is admixed in cement and is added in mix pot together, Zhi Houjia
Enter water-reducing agent and sand, starting mix pot stirs 10S, is eventually adding water mix 2min30s.
2, reference examples 3
Benchmark rubber concrete: for rubber grain by 10% isometric substitution part sand, each raw material weight match ratio is cement:
Water: sand: stone: rubber grain: water-reducing agent=430:151.7:562.5:1160:27.5:7.74, and the rubber grain is not
Through any processing.
Mix and stir technique:
1) stone, cement, sand, rubber grain, water-reducing agent and water are weighed according to match ratio；
2) first stone is added in mix pot, then rubber grain is admixed in cement and is added in mix pot together, Zhi Houjia
Enter water-reducing agent and sand, starting mix pot stirs 10S, is eventually adding water mix 2min30s.
3, reference examples 4
Benchmark rubber concrete: for rubber grain by 15% isometric substitution part sand, each raw material weight match ratio is cement:
Water: sand: stone: rubber grain: water-reducing agent=430:151.7:531.25:1160:41.3:7.74, and the rubber grain
Without any processing.
Mix and stir technique:
1) stone, cement, sand, rubber grain, water-reducing agent and water are weighed according to match ratio；
2) first stone is added in mix pot, then rubber grain is admixed in cement and is added in mix pot together, Zhi Houjia
Enter water-reducing agent and sand, starting mix pot stirs 10S, is eventually adding water mix 2min30s.
1 benchmark normal concrete of 2,3,4 modified rubber concrete of embodiment and reference examples, 2,3,4 benchmark rubber of reference examples
The performance comparison result of concrete see the table below.From following table: being spiked by the processed rubber grain of the method for the present invention general
After in logical concrete, the intensity of 2,3,4 modified rubber concrete of embodiment reduces amplitude compared with benchmark normal concrete intensity
Reduce, compared with 2,3,4 benchmark rubber concrete of control group, intensity significantly improves, be respectively increased 19.2%, 25.8%,
30.2%.Compared with benchmark rubber concrete, the anti-splitting tensile and compressive strength of 2,3,4 modified rubber concrete of embodiment and benchmark rubber
Glue concrete strength is respectively increased 38.8%, 17.6%, 13.7% compared to increasing substantially；But 2,3,4 modified rubber of example
The freezing and thawing performance of concrete is obviously deteriorated compared with 2,3,4 benchmark rubber concrete of control group, and internal cracking severity is most fast, tends to pair
1 benchmark normal concrete performance as usual.
Claims (10)
1. a kind of rubber concrete of modification, it is characterised in that: cement: water: sand: stone: modified rubber grain=430:
151.7:593.75-531.25:1160:13.76-41.3；The preparation method of the rubber grain of the modification is:
It is taken out 1. rubber grain was immersed in tap water after 7-10 days；
2. accelerator and cement are uniformly mixed according to the ratio of 1:4；
3. 2. the mixing of gained powder, stirring to the mixture slump are 6-10 for 1. rubber grain and step that step is moistened；
4. conserving in water after 3. compound particles that step is obtained are dry, need to dry in use, taking out to particle surface
In canescence.
2. the rubber concrete of modification according to claim 1, it is characterised in that: above-mentioned cement selection normal silicate water
Mud P.O 42.5.
3. the rubber concrete of modification according to claim 1, it is characterised in that: above-mentioned sand is middle sand, and maximum particle diameter is
5mm, fineness modulus 2.53, apparent density 2543kg/m3。
4. the rubber concrete of modification according to claim 1, it is characterised in that: above-mentioned stone is graduation two limestone,
Partial size is 5-10mm and two kinds of 10-20mm, and the ratio between the two parameter is 4:6, apparent density 2732kg/m3。
5. the rubber concrete of modification according to claim 1, it is characterised in that: above-mentioned rubber grain partial size is 3-4mm,
Apparent density 1118kg/m3。
6. the rubber concrete of modification according to claim 1, it is characterised in that: above-mentioned accelerator is 782-3 High-efficient Water
Mud accelerator.
7. the rubber concrete of modification according to claim 1, it is characterised in that: above-mentioned cement: water: sand: stone: rubber
Particle=430:151.7:593.75:1160:13.76.
8. the rubber concrete of modification according to claim 1, it is characterised in that: above-mentioned cement: water: sand: stone: rubber
Particle=430:151.7:562.5:1160:27.5.
9. the rubber concrete of modification according to claim 1, it is characterised in that: above-mentioned cement: water: sand: stone: rubber
Particle=430:151.7:531.25:1160:41.3.
10. the rubber concrete of modification according to claim 1, it is characterised in that: prepared by the rubber grain of above-mentioned modification
The step of method 1. in the additive amount of tap water be 2 times of rubber volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710826181.7A CN109503058A (en) | 2017-09-14 | 2017-09-14 | A kind of rubber concrete of modification |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710826181.7A CN109503058A (en) | 2017-09-14 | 2017-09-14 | A kind of rubber concrete of modification |
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| CN109503058A true CN109503058A (en) | 2019-03-22 |
Family
ID=65744387
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439082A (en) * | 2019-07-10 | 2019-11-12 | 江苏大学 | A kind of backfill structure and construction method suitable for underground piping vibration isolation |
| CN112209648A (en) * | 2020-12-02 | 2021-01-12 | 广东博智林机器人有限公司 | Modified waste rubber, preparation method thereof and sound insulation mortar |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787605A (en) * | 2014-02-25 | 2014-05-14 | 河南省水利科学研究院 | Modification method of rubber particles and modified rubber concrete |
| US20140308077A1 (en) * | 2013-04-11 | 2014-10-16 | Italcementi S.P.A. | Concrete screed with recycled rubber from discarded tyres |
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2017
- 2017-09-14 CN CN201710826181.7A patent/CN109503058A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140308077A1 (en) * | 2013-04-11 | 2014-10-16 | Italcementi S.P.A. | Concrete screed with recycled rubber from discarded tyres |
| CN103787605A (en) * | 2014-02-25 | 2014-05-14 | 河南省水利科学研究院 | Modification method of rubber particles and modified rubber concrete |
Non-Patent Citations (2)
| Title |
|---|
| KOU L: ""Mechanical properties analysis of the microstructure of rubber modified concrete"", 《ADVANCED BUILDING MATERIALS》 * |
| 舒展等: "石化法改性橡胶混凝土力学性能研究", 《四川建筑科学研究》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439082A (en) * | 2019-07-10 | 2019-11-12 | 江苏大学 | A kind of backfill structure and construction method suitable for underground piping vibration isolation |
| CN110439082B (en) * | 2019-07-10 | 2024-03-19 | 江苏大学 | Backfill structure suitable for vibration isolation of underground pipeline and construction method |
| CN112209648A (en) * | 2020-12-02 | 2021-01-12 | 广东博智林机器人有限公司 | Modified waste rubber, preparation method thereof and sound insulation mortar |
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