CN110143795A - A kind of PVA fibre modification rubber concrete and preparation method thereof - Google Patents
A kind of PVA fibre modification rubber concrete and preparation method thereof Download PDFInfo
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- CN110143795A CN110143795A CN201910527114.4A CN201910527114A CN110143795A CN 110143795 A CN110143795 A CN 110143795A CN 201910527114 A CN201910527114 A CN 201910527114A CN 110143795 A CN110143795 A CN 110143795A
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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
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of PVA fibre modification rubber concretes and preparation method thereof, including cement, fine aggregate, coarse aggregate, rubber grain, silicon ash, swelling agent, PVA fiber, water and water-reducing agent；It is 2300kg/m that the cement, fine aggregate, coarse aggregate, rubber grain, silicon ash, swelling agent, PVA fiber, water and water-reducing agent are mixed and made into apparent density according to a certain ratio3~2400kg/m3Concrete.The present invention improves rubber concrete bending resistance deformability using the characteristic of PVA fiber, improve the mechanical property of rubber concrete, so as to improve the performance of rubber concrete, it can play a role in terms of reducing loss of strength, improving toughness, waterproofing and anti-leakage, raising, thus manufactured high performance concrete.
Description
Technical field
The present invention relates to concrete, in particular to a kind of PVA fibre modification rubber concrete and preparation method thereof.
Background technique
The rapid development of auto industry is so that recycling brought by waste tire and processing problem become increasingly conspicuous.Waste tire
It is one kind of solid waste, referred to as " black pollution ", recycling and processing technique are always global problem and environment
The problem of protection.It is a kind of resource-effective, environmental-friendly that waste and old rubber particle, which is used for cement concrete material as aggregate,
Utilization ways are not only able to largely utilize waste old, and provide new side to solve the intrinsic brittleness problems of concrete
Method.Compared with bituminous concrete, rubber concrete rigidity, intensity are apparently higher than the former, and fatigue life length, water-tolerant,
Frost resistance and skid resistance is excellent, corrosion resistance is strong, stability is also relatively good, and the road surface and airport more suitable for heavy traffic are run
Road has wider array of application range.Compared with conventional concrete, rubber concrete is with light-weight, toughness is high, energy absorption
It is more, crack resistance is superior, sound insulation, feature heat-insulated, shock resistance is strong.These features make rubber concrete can be widely applied to build
Engineering field.But experimental studies all at present shows that the strong of cement-based material can be significantly reduced by adding rubber particles
Degree.How to realize the cracking resistance of cement-based material, toughening and there will not be apparent negative effect to become in concrete to intensity
Using the key problem in technology of rubber particles.
Summary of the invention
The purpose of the present invention is improve the bending resistance deformability of rubber concrete and impact flexibility and mention to a certain extent
Its high intensity provides a kind of PVA fibre modification rubber concrete and preparation method thereof.The present invention is changed using the characteristic of PVA fiber
Kind rubber concrete bending resistance deformability, improves the mechanical property of rubber concrete, can so as to improve the performance of rubber concrete
To play a role in terms of reducing loss of strength, improving toughness, waterproofing and anti-leakage, raising, thus manufactured high-performance
Concrete.
The technical scheme adopted by the invention is that: a kind of PVA fibre modification rubber concrete, including it is cement, fine aggregate, thick
Aggregate, rubber grain, silicon ash, swelling agent, PVA fiber, water and water-reducing agent；The dosage of the cement is 400kg/m3Concrete~
500kg/m3Concrete, the dosage of the fine aggregate are 600kg/m3Concrete~800kg/m3Concrete, the use of the coarse aggregate
Amount is 800kg/m3Concrete~1000kg/m3Concrete, the dosage of the rubber grain be fine aggregate dosage 10%~
30%, the dosage of the silicon ash is the 0%~10% of the cement consumption, and the dosage of the swelling agent is the cement consumption
0%~10%, the dosage of the PVA fiber is the 0.5%~2.0% of the cement consumption, and the dosage of the water is the water
The 30%~50% of mud dosage, the dosage of the water-reducing agent are the 0.5%~2.0% of the cement consumption, by the cement, carefully
It is 2300kg/ that aggregate, coarse aggregate, rubber grain, silicon ash, swelling agent, PVA fiber, water and water-reducing agent, which are mixed and made into apparent density,
m3~2400kg/m3Concrete.
Further, the cement uses ordinary portland cement.
Further the fine aggregate is the middle sand of fineness modulus 2.3~3.0.
Further the coarse aggregate is the rubble or cobble of 5mm~30mm continuous grading.
Further the rubber grain maximum particle diameter is 2.5mm, average grain diameter 1.05mm, density 1120kg/m3,
Apparent density is 1050kg/m3, water absorption rate is less than 10%.
Further the average grain diameter of the silicon ash is 0.1 μm~0.3 μm.
Further the swelling agent is using the sulphur aluminic acid for generating entringite after capable of mixing and stirring with cement and water through hydration reaction
Calcium class cement expansive material.
Further the length of the PVA fiber is 5mm~20mm.
Further the water-reducing agent uses poly carboxylic acid series water reducer.
It is of the present invention another solution is that a kind of above-mentioned PVA fibre modification rubber concrete preparation method,
The following steps are included:
Step 1, according to the dosage of water and water-reducing agent, water and water-reducing agent are configured to solution；
Step 2, according to the dosage of PVA fiber, PVA fiber is put into the solution that step 1 obtains, and using ultrasonic wavelength-division
Dissipate several minutes；
Step 3, cement, fine aggregate, coarse aggregate, rubber grain, silicon ash and swelling agent and step 2 are divided by match ratio
The solution containing PVA fiber pours into agitated kettle after dissipating, and stirring after-pouring pouring molding into mold obtains after conserving several days
To PVA fibre modification rubber concrete.
The beneficial effects of the present invention are: to improve the bending resistance deformability of rubber concrete and impact flexibility and in certain journey
Improve its intensity on degree, the present invention provides a kind of PVA fibre modification rubber concrete and preparation method thereof, and the present invention utilizes PVA
The characteristic of fiber improves rubber concrete bending resistance deformability, improves the mechanical property of rubber concrete, mixed so as to improve rubber
The performance of soil is coagulated, can be played a role in terms of reducing loss of strength, improving toughness, waterproofing and anti-leakage, raising, thus
Manufactured high performance concrete.
Detailed description of the invention
Fig. 1 be in the present invention PVA fibre modification rubber concrete and General Purpose Rubber concrete under different rubber volumes
Compression strength variation diagram.
Fig. 2 be in the present invention PVA fibre modification rubber concrete and General Purpose Rubber concrete under different rubber volumes
Flexural strength variation diagram.
Specific embodiment
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and cooperate attached drawing
Detailed description are as follows:
A kind of PVA fibre modification rubber concrete is by cement, fine aggregate, coarse aggregate, rubber grain, silicon ash, expansion
Made of agent, PVA fiber, water and water-reducing agent.Wherein, the dosage of the cement is 400kg/m3Concrete~500kg/m3Coagulation
Soil, the dosage of the fine aggregate are 600kg/m3Concrete~800kg/m3Concrete, the dosage of the coarse aggregate are 800kg/m3
Concrete~1000kg/m3Concrete, the dosage of the rubber grain are the 10%~30% of fine aggregate dosage, the silicon ash
Dosage is the 0%~10% of the cement consumption, and the dosage of the swelling agent is the 0%~10% of the cement consumption, described
The dosage of PVA fiber is the 0.5%~2.0% of the cement consumption, the dosage of the water be the cement consumption 30%~
50%, the dosage of the water-reducing agent is the 0.5%~2.0% of the cement consumption, by the cement, fine aggregate, coarse aggregate, rubber
It is 2300kg/m that glue particle, silicon ash, swelling agent, PVA fiber, water and water-reducing agent, which are mixed and made into apparent density,3~2400kg/m3's
Concrete.
The cement uses ordinary portland cement, and quality index complies with standard.
The fine aggregate is the middle sand of fineness modulus 2.3~3.0.
The coarse aggregate is the rubble or cobble of 5mm~30mm continuous grading.
The rubber grain includes mainly scrap rubber, rubber leftover pieces, car mat band, automobile by various waste olds
The production of the waste olds Raw material processing such as tire.The rubber grain maximum particle diameter that the present invention preferentially uses is 2.5mm, average grain
Diameter is 1.05mm, density 1120kg/m3, apparent density 1050kg/m3, water absorption rate is less than 10%.
Silicon ash as concrete admixture, not only reduces the usage amount of cement, has as one of " three industrial wastes "
The problem of effect alleviates energy problem, problem of environmental pollution and the resource exhaustion in century makes concrete more have green
Feature is more in line with the strategy of sustainable development simultaneously, and the average grain diameter of the silicon ash selected in invention is 0.1 μm~0.3 μ
M wants low two orders of magnitude compared to ordinary cement, this, which allows for the silicon ash selected in the present invention, has very high pozzolanic activity,
Micro- filler is played the role of in pozzolanic reaction, and hole is refined, so that hardened paste compact structure, simultaneously because silicon
The secondary hydration effect of ash, new hydrated calcium silicate gel body is blocked in pore, so that pore is become smaller and discontinuously, substantially
The performances such as the density for improving rubber concrete, intensity, impervious, freeze proof are spent, the addition of silicon ash is so that the present invention in the present invention
Each age compression strength of middle rubber concrete improves 5%~15% compared to traditional rubber concrete.
Swelling agent refers to a kind of material that can cause volume expansion by physical and chemical reaction, and volume expansion can be applied to
The multiple fields such as material production, voiceless demolition.One main cause of rubber concrete strength reduction is because when rubber mixes
A large amount of bubble can be introduced when in concrete.When mixing swelling agent, swelling agent can make inside concrete that certain expansion occur,
Certain prestressing force can be inside generated, allows the bubble of inside concrete to largely reduce, rubber concrete is greatly improved
The performances such as density, intensity, impervious.The swelling agent refers to calcium sulphoaluminate class cement expansive material, passes through after mixing and stirring with cement, water
The cement expansive material of hydration reaction generation entringite.The addition of swelling agent is so that rubber concrete in the present invention in the present invention
Each age compression strength improves 5%~10% compared to traditional rubber concrete.
PVA fiber refers to that vinal, PVA fiber refer to the high-quality polyvinyl alcohol (PVA) of high polymerization degree for original
It is high, wear-resisting, anti-to be mainly characterized by intensity high-modulus for material, a kind of synthetic fibers being process using specific advanced technology
Soda acid, good weatherability have good affinity and associativity with substrates such as cement, gypsum, and it is nontoxic, pollution-free, do not damage people
Body skin, it is harmless, it is one of high-tech green building material of a new generation.The length of the PVA fiber is 5mm~20mm.
The water-reducing agent preferentially uses polycarboxylate high performance water-reducing agent, is a kind of with more high water reducing rate, more preferable slump
Spend retention property, less dry contraction, and the water-reducing agent with certain bleed performance.
Above-mentioned PVA fibre modification rubber concrete the preparation method comprises the following steps: in order to allow PVA fiber uniformly to divide in concrete
Cloth makes PVA fiber play maximum effect, firstly, being configured to water and water-reducing agent in beaker according to the dosage of water and water-reducing agent
Solution；Then, PVA fiber is put into the solution that water and water-reducing agent are formed, then beaker is put into ultrasonic equipment using super
Sound wave disperses 15 minutes~30 minutes, and PAV fiber is fully dispersed；Finally, pressing match ratio for cement, fine aggregate, coarse aggregate, rubber
Glue particle, silicon ash and swelling agent and the scattered solution containing PVA fiber pour into agitated kettle, mix slowly after-pouring
The pouring molding into mold conserves 28 days, prepares PVA fibre modification rubber concrete.
Embodiment 1
The dosage of cement is 400kg/m3Concrete, the dosage of fine aggregate are 800kg/m3Concrete, the dosage of coarse aggregate
For 1000kg/m3Concrete, the dosage of rubber grain are 80kg/m3Concrete, silicon ash dosage are 0kg/m3Concrete, swelling agent
Dosage is 0kg/m3Concrete, the PVA fiber consumption that length is 6mm is 3kg/m3Concrete, water dosage be 120kg/m3Coagulation
Soil, water-reducing agent dosage are 2kg/m3Concrete, cement, fine aggregate, coarse aggregate, rubber grain, silicon ash, swelling agent, PVA is fine
It is 2400kg/m that dimension, water and water-reducing agent, which are mixed and made into apparent density,3Concrete.The match ratio is used with lower PVA fiber
Amount, cost is the cheapest, and compared to General Purpose Rubber concrete, compression strength improves 10%, and flexural strength improves 100%.
Embodiment 2
The dosage of cement is 450kg/m3Concrete, the dosage of fine aggregate are 700kg/m3Concrete, the dosage of coarse aggregate
For 900kg/m3Concrete, the dosage of rubber grain are 140kg/m3Concrete, silicon ash dosage are 5kg/m3Concrete, swelling agent
Dosage is 10kg/m3Concrete, the PVA fiber consumption that length is 12mm is 4.5kg/m3Concrete, water dosage be 135kg/m3
Concrete, water-reducing agent dosage are 4.5kg/m3Concrete, by cement, fine aggregate, coarse aggregate, rubber grain, silicon ash, swelling agent,
It is 2350kg/m that PVA fiber, water and water-reducing agent, which are mixed and made into apparent density,3Concrete.The match ratio has moderate PVA fine
Wesy's amount, cost is relatively low, and compared to General Purpose Rubber concrete, compression strength improves 15%, and flexural strength improves 120%.
Embodiment 3
The dosage of cement is 500kg/m3Concrete, the dosage of fine aggregate are 600kg/m3Concrete, the dosage of coarse aggregate
For 800kg/m3Concrete, the dosage of rubber grain are the 25% of fine aggregate dosage, and silicon ash dosage is 10kg/m3Concrete, expansion
Agent dosage is 20kg/m3Concrete, the PVA fiber consumption that length is 18mm is 6kg/m3Concrete, water dosage be 200kg/m3
Concrete, water-reducing agent dosage are 8kg/m3Concrete, by cement, fine aggregate, coarse aggregate, rubber grain, silicon ash, swelling agent, PVA
It is 2400kg/m that fiber, water and water-reducing agent, which are mixed and made into apparent density,3Concrete.The match ratio has biggish PVA fiber
Dosage, higher cost, compared to General Purpose Rubber concrete, compression strength improves 20%, and flexural strength improves 140%.
To sum up, General Purpose Rubber concrete is anti-since with any substance in concrete chemistry does not occur for rubber grain itself
It answers, main function is physics filling, and concrete is made to have the functional characteristics such as high tenacity, resistance to punching mill, high-damping.But due to rubber
Interface gaps problem between glue particle and concrete, concrete strength decline quickly, lead to its high tenacity, resistance to punching mill, height
The functional characteristics such as damping, which are unable to get, to be made full use of.After mixing a certain amount of PVA fiber in rubber concrete, PVA fiber exists
Unordered net distribution in concrete, overlap joint of the web between Interface Crack can play the function served as bridge of stress transfer, work as material
When expecting stress, rubber and fiber can play the role of discharging stress concentration, while can delay the extension in crack, improve material
The compression strength (such as Fig. 1) and flexural strength (such as Fig. 2) of material.When this illustrates among PVA fiber incorporation rubber concrete,
Net distribution of the PVA fiber in concrete and its overlap joint bridge formation between Interface Crack can play apparent blocking effect, mention
The mechanical property of high rubber concrete, so as to improve the performance of rubber concrete, can reduce loss of strength, improve toughness,
Waterproofing and anti-leakage, raising durability etc. play a role, thus manufactured high-performance rubber concrete.
The present invention has the characteristics that high-tensile and high elastic modulus according to PVA fiber, it is compound with rubber particles
Modified concrete material achieves and significantly improves the bending resistance deformability of material and the effect of impact flexibility, and intensity decline
Trend has obtained effectively slowing down.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, may be used also
By make it is many in the form of, within these are all belonged to the scope of protection of the present invention.
Claims (10)
1. a kind of PVA fibre modification rubber concrete, which is characterized in that including cement, fine aggregate, coarse aggregate, rubber grain, silicon
Ash, swelling agent, PVA fiber, water and water-reducing agent；The dosage of the cement is 400kg/m3Concrete~500kg/m3Concrete, institute
The dosage for stating fine aggregate is 600kg/m3Concrete~800kg/m3Concrete, the dosage of the coarse aggregate are 800kg/m3Coagulation
Soil~1000kg/m3Concrete, the dosage of the rubber grain are the 10%~30% of the fine aggregate dosage, the silicon ash
Dosage is the 0%~10% of the cement consumption, and the dosage of the swelling agent is the 0%~10% of the cement consumption, described
The dosage of PVA fiber is the 0.5%~2.0% of the cement consumption, the dosage of the water be the cement consumption 30%~
50%, the dosage of the water-reducing agent is the 0.5%~2.0% of the cement consumption, by the cement, fine aggregate, coarse aggregate, rubber
It is 2300kg/m that glue particle, silicon ash, swelling agent, PVA fiber, water and water-reducing agent, which are mixed and made into apparent density,3~2400kg/m3's
Concrete.
2. a kind of PVA fibre modification rubber concrete according to claim 1, which is characterized in that the cement is using general
Logical portland cement.
3. a kind of PVA fibre modification rubber concrete according to claim 1, which is characterized in that the fine aggregate is thin
Spend the middle sand of modulus 2.3~3.0.
4. a kind of PVA fibre modification rubber concrete according to claim 1, which is characterized in that the coarse aggregate is 5mm
The rubble or cobble of~30mm continuous grading.
5. a kind of PVA fibre modification rubber concrete according to claim 1, which is characterized in that the rubber grain is most
Big partial size is 2.5mm, average grain diameter 1.05mm, density 1120kg/m3, apparent density 1050kg/m3, water absorption rate is less than
10%.
6. a kind of PVA fibre modification rubber concrete according to claim 1, which is characterized in that the silicon ash is averaged
Partial size is 0.1 μm~0.3 μm.
7. a kind of PVA fibre modification rubber concrete according to claim 1, which is characterized in that the swelling agent uses
The calcium sulphoaluminate class cement expansive material of entringite is generated after capable of mixing and stirring with cement and water through hydration reaction.
8. a kind of PVA fibre modification rubber concrete according to claim 1, which is characterized in that the length of the PVA fiber
Degree is 5mm~20mm.
9. a kind of PVA fibre modification rubber concrete according to claim 1, which is characterized in that the water-reducing agent uses
Poly carboxylic acid series water reducer.
10. a kind of preparation method based on the described in any item PVA fibre modification rubber concretes of the claims 1 to 9,
It is characterized in that, comprising the following steps:
Step 1, according to the dosage of water and water-reducing agent, water and water-reducing agent are configured to solution；
Step 2, according to the dosage of PVA fiber, PVA fiber is put into the solution that step 1 obtains, and if being dispersed using ultrasonic wave
Dry minute；
It step 3, will be after cement, fine aggregate, coarse aggregate, rubber grain, silicon ash and swelling agent and step 2 dispersion by match ratio
Solution containing PVA fiber pours into agitated kettle, and stirring after-pouring pouring molding into mold obtains PVA after conserving several days
Fibre modification rubber concrete.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110981327A (en) * | 2019-10-08 | 2020-04-10 | 徐思钰 | Modified rubber particle anti-abrasion ultra-high-toughness concrete and preparation method thereof |
| CN111704411A (en) * | 2020-06-22 | 2020-09-25 | 深圳大学 | Environment-friendly fiber reinforced rubber concrete and preparation method thereof |
| CN113216505A (en) * | 2021-04-28 | 2021-08-06 | 江苏蓝圈新材料股份有限公司 | High-strength PC component for prefabricated house |
| CN113683355A (en) * | 2021-07-13 | 2021-11-23 | 华北水利水电大学 | Composite modified rubber roller compacted concrete and preparation method thereof |
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2019
- 2019-06-18 CN CN201910527114.4A patent/CN110143795A/en active Pending
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110981327A (en) * | 2019-10-08 | 2020-04-10 | 徐思钰 | Modified rubber particle anti-abrasion ultra-high-toughness concrete and preparation method thereof |
| CN111704411A (en) * | 2020-06-22 | 2020-09-25 | 深圳大学 | Environment-friendly fiber reinforced rubber concrete and preparation method thereof |
| CN113216505A (en) * | 2021-04-28 | 2021-08-06 | 江苏蓝圈新材料股份有限公司 | High-strength PC component for prefabricated house |
| CN113683355A (en) * | 2021-07-13 | 2021-11-23 | 华北水利水电大学 | Composite modified rubber roller compacted concrete and preparation method thereof |
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Application publication date: 20190820 |