CN108585641A - A kind of rubber powder aggregate concrete optimum design method improving water resistant permeance property - Google Patents
A kind of rubber powder aggregate concrete optimum design method improving water resistant permeance property Download PDFInfo
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- CN108585641A CN108585641A CN201810386447.5A CN201810386447A CN108585641A CN 108585641 A CN108585641 A CN 108585641A CN 201810386447 A CN201810386447 A CN 201810386447A CN 108585641 A CN108585641 A CN 108585641A
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- rubber powder
- concrete
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- aggregate
- test specimen
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
Abstract
The present invention relates to a kind of rubber powder aggregate concrete optimum design methods for the raising water resistant permeance property applied in road and science of bridge building.Cement base rubber powder aggregate concrete of the present invention is prepared using inner blending method, and fine aggregate is substituted in equal volume with rubber powder.Relative coefficient of permeability in each group is obtained based on infiltration height method test data, and the average infiltration height marker changing rule relative to normal concrete, rubber powder grain size and volume are established with respect to optimum mix proportion, can be used for instructing mix Design in Practical Project.Obtained highly resistance water permeation performance rubber powder aggregate concrete is applied in pavement of road engineering or the deck paving engineering in the abundant area of amount of rainfall, it can not only realize the pollution-free digestion process of waste rubber goods, solve shortage of resources and environmental pollution two large problems, and its excellent water resistant permeance property can be given full play to, achieve the purpose that save energy consumption, ensured civil engineering structure durability under adverse circumstances.
Description
Technical field
The invention belongs to road and technical field of bridge engineering, more particularly to a kind of infiltrative rubber powder collection of raising water resistant
Expect concrete optimum design method.
Background technology
Pavement concrete layer and deck paving integration concrete layer etc. be year in year out in road and science of bridge building, in service phase
Month after month be under the rugged environment of field, due to for a long time by diseases such as rainwater erosions, secondary freezing-thawing damage, Chloride Attack and
The problems such as alkali-aggregate reaction, eventually leads to the durability damage of concrete layer, to seriously affect the use of pavement structure, drop
Its low service life.
Concrete is one of fundamental property of porous material, it reflects the size of inside concrete hole, quantity
And situations such as connectivity.Corrosive medium in external environment must be and mixed first by penetrating into the inside of concrete
Coagulate soil component interact, cause the most basic reason of durability damage be presence and the concrete itself of water not
Etching medium caused by uniformity (hole, seam) invades.
It is since rubber powder changes coagulation to recycle influence of the incorporation of rubber powder for concrete material anti-permeability performance
The microstructure of soil makes inside concrete generate disconnected bubble, blocks capillary channel, changes pore structure, to change
It has been apt to the impermeability of concrete.But the mechanism in rubber concrete hydrone process of osmosis is complex, one side rubber powder
Grain can increase the capillary pressure in matrix, and the incorporation of another aspect rubber powder is but also pore drag in response increases.
In general, rubber powder aggregate concrete water resistant permeance property there is no unified mark at present by the reciprocation of many factors
It will definitely follow.
Invention content
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide a kind of raising water resistant permeance properties
Rubber powder aggregate concrete optimum design method and its application are designed so that gained by the rubber powder grain size and volume of optimization
Concrete has the effect of highly resistance water penetration durability, can be applied to the road engineering concrete road surface in the abundant area of amount of rainfall with
And in science of bridge building deck paving integration concrete layer.
To achieve the goals above, the technical solution adopted by the present invention is：
The grain size and volume Optimum combinatorial design of rubber powder of the present invention are averaged by what infiltration height method was tested
Infiltration is than index RDIt determines, difference group Rubberized Portland Cement Concrete water resistant permeance property improves degree with average infiltration than index RDTable
Sign：
In formula：
RD- rubber powder aggregate concrete averagely permeates ratio.
Krs- rubber powder aggregate concrete relative coefficient of permeability (cm/h), is calculated based on Darcy laws, and computational methods are seen below
Formula：
In formula：
DrmThe average infiltration height (cm) of-rubber powder aggregate concrete；
H-water pressure is indicated (cm) with water-column；
The time (h) of t-constant pressure experience；
The water absorption rate of α-concrete, takes 0.03.
Kcs- normal concrete relative coefficient of permeability (cm/h), is calculated based on Darcy laws, and computational methods see below formula：
In formula：
Dcm- normal concrete averagely seeps water highly (cm).
Other symbolic significances are the same as aforementioned.
According to application scenarios difference, it is not spiked with rubber powder in normal concrete, keeps normal concrete water, cement, thick bone
Material and water-reducing agent dosage are constant, combine the different-grain diameter and additive amount of rubber powder, obtain rubber powder aggregate concrete, pass through infiltration
Height method is tested, and is obtained average infiltration and is compared RDMinimum optimum organization.
Rubber powder is not spiked in normal concrete, component proportioning is：Fine aggregate 757.0kg/m3；Coarse aggregate 1090kg/m3；
Water-reducing agent 9.57kg/m3；Water 144kg/m3；Cement 445kg/m3；The ratio of mud 0.32.
In rubber powder aggregate concrete, rubber powder volume is mixed according to the principle incorporation benchmark of fine aggregate volume fixed percentage
In solidifying soil, other components proportioning is：Coarse aggregate 1090kg/m3；Water-reducing agent 9.57kg/m3；Water 144kg/m3；Cement 445kg/m3；
The ratio of mud 0.32.Rubber powder volume is respectively 10%, 20%, the 30% of fine aggregate volume, and rubber powder grain size is respectively 80 mesh, 40
Mesh, 20 mesh carry out infiltration height method composite test.
It is described infiltration height method experiment basic step be：
1) the infiltration height round platform test specimen made takes out after reaching 28d ages, after surface of test piece drying, is applied in its side
Smear sealing material, it is ensured that water cannot be oozed out from test specimen side, and the test specimen handled well is pressed by screw press device by heating
Die trial in；
2) start plus the water pressure test, water pressure keep 3.0 ± 0.05MPa, wait for that the time reaches and stop experiment for 24 hours；
3) test specimen of taking-up is placed on forcing press, test specimen is cleaved into two along vertical section, with ink after seeing washmarking clearly
Juice describes, and washmarking is the profile to seep water.It will be ready to be decorated with the ladder of ten equidistant straight lines perpendicular to upper bottom surface in advance
Shape glass plate (upper bottom 0.175m, bottom 0.185m, high 0.15m) is placed on test specimen splitting surface, is measured according to the washmarking described every
The infiltration height of a measuring point；
4) with 6 test specimens for one group, the combination of identical rubber powder grain size and volume, each test specimen are kept with each test specimen in group
The infiltration height for testing 10 measuring points, is calculated the average infiltration height of every group of test specimen of arithmetic mean of instantaneous value.
Highly resistance water permeation performance rubber powder aggregate concrete of the present invention, by analyzing rubber powder grain size and volume pair
Average infiltration is than index RDAffecting laws, provide water resistant permeance property driving under rubber powder grain size and volume optimum organization,
Instruct mix-design.
Compared with prior art, concrete of the present invention has larger advantage in the average infiltration of reduction than index etc.,
The combination of its rubber powder Optimal Parameters is obtained for instructing mix-design in Practical Project that there is application value.It is applied
In the pavement of road engineering or deck paving engineering in abundant rainfall area, it can not only realize that the pollution-free of waste rubber goods disappears
Change is handled, and is solved shortage of resources and environmental pollution two large problems, and can give full play to its excellent water resistant permeance property, is reached
The purpose for having arrived and having saved energy consumption, ensured adverse circumstances lower structure durability.
Description of the drawings
Fig. 1 is that present invention infiltration height method tests round platform test specimen schematic diagram
Fig. 2 is that change curve is compared in the average infiltration of the present invention.
Specific implementation mode
The invention specific implementation mode does not constitute the whole limitation to the scope of the invention, every in present inventive concept
Principle and spirit within, the improvement etc. of any modification, equivalent replacement that one of skill in the art makes should be included in this
Within the protection domain of invention.
With recycle in rubber powder partial alternative conventional concrete the cement base rubber powder that thick, fine aggregate is prepared gather materials it is mixed
Solidifying soil material, had not only alleviated the pressure that waste tire is brought to environment, but also can try hard to improve the performance of normal concrete, was collection ring
It protects with resource reutilization in the forward-looking innovation of one.The incorporation of rubber powder is recycled for concrete material anti-permeability performance
Influence be so that inside concrete is generated disconnected bubble since rubber powder changes the microstructure of concrete, block
Capillary channel changes pore structure, so as to improve the impermeability of concrete.But rubber concrete hydrone penetrates
Mechanism in journey is complex, and by the reciprocation of various factors, one side rubber powder can increase water resistant osmotic energy
Capillary pressure in matrix, the incorporation of another aspect rubber powder is but also pore drag in response increases.How maximum limit
Degree plays the grain size and volume combination advantage of rubber powder, ensures that positive acting degree is much larger than acting in opposition, decrease even is eliminated
The influence of disadvantage factor is the key that solve the problems, such as.
For this purpose, need to be by the way that rational evaluation index is arranged, and seek more excellent combining form, the application design by testing
Embodiment is as follows.
Embodiment 1
The rubber powder aggregate concrete optimum design method for improving water resistant permeance property, thin bone is substituted with rubber powder in equal volume
Material.The particle size of the rubber powder of incorporation is 80 mesh, volume 10%, fine aggregate 681.3kg/m3.Other groups of rubber concrete
Part matches：Coarse aggregate 1090kg/m3；Water-reducing agent 9.57kg/m3；Water 144kg/m3；Cement 445kg/m3；The ratio of mud 0.32.
Preparation method is as follows：The rubber powder for weighing formula ratio mixes according to fine aggregate volume fixed percentage and replaces phase
Volume fine aggregate is answered, then cement, water, coarse aggregate, the water-reducing agent etc. for putting into formula ratio, rubber powder is obtained after stirring and is gathered materials coagulation
Soil.Obtained rubber powder aggregate concrete is entered into molding and makees infiltration height method test specimen, scantling is back cut diameter 175mm, under
The round platform test specimen of mouth diameter 185mm, high 150mm, as shown in Figure 1.
Infiltration height method experiment is carried out to rubber powder aggregate concrete test specimen, obtains the changing rule of average infiltration ratio, phase
To coefficient of permeability KrsIt is 0.44 × 10-6(cm/h), R is compared in average infiltrationDIt is 0.55.
Embodiment 2
It is a kind of improve water resistant permeance property rubber powder aggregate concrete optimum design method, it is different from embodiment 1 it
It is in the particle size of the rubber powder of incorporation is 80 mesh, volume 20%, fine aggregate 605.6kg/m3。
Infiltration height method experiment is carried out with reference to embodiment 1, obtains relative coefficient of permeability KrsIt is 0.37 × 10-6(cm/h), it puts down
R is compared in infiltrationDIt is 0.51.
Embodiment 3
It is a kind of improve water resistant permeance property rubber powder aggregate concrete optimum design method, it is different from embodiment 1 it
It is in the particle size of the rubber powder of incorporation is 80 mesh, volume 30%, fine aggregate 529.9kg/m3。
Infiltration height method experiment is carried out with reference to embodiment 1, obtains relative coefficient of permeability KrsIt is 0.31 × 10-6(cm/h), it puts down
R is compared in infiltrationDIt is 0.46.
Embodiment 4
It is a kind of improve water resistant permeance property rubber powder aggregate concrete optimum design method, it is different from embodiment 1 it
It is in the particle size of the rubber powder of incorporation is 40 mesh, volume 10%, fine aggregate 681.3kg/m3。
Infiltration height method experiment is carried out with reference to embodiment 1, obtains relative coefficient of permeability KrsIt is 0.24 × 10-6(cm/h), it puts down
R is compared in infiltrationDIt is 0.41.
Embodiment 5
It is a kind of improve water resistant permeance property rubber powder aggregate concrete optimum design method, it is different from embodiment 1 it
It is in the particle size of the rubber powder of incorporation is 40 mesh, volume 20%, fine aggregate 605.6kg/m3。
Infiltration height method experiment is carried out with reference to embodiment 1, obtains relative coefficient of permeability KrsIt is 0.13 × 10-6(cm/h), it puts down
R is compared in infiltrationDIt is 0.30.
Embodiment 6
It is a kind of improve water resistant permeance property rubber powder aggregate concrete optimum design method, it is different from embodiment 1 it
It is in the particle size of the rubber powder of incorporation is 40 mesh, volume 30%, fine aggregate 529.9kg/m3。
Infiltration height method experiment is carried out with reference to embodiment 1, obtains relative coefficient of permeability KrsIt is 0.15 × 10-6(cm/h), it puts down
R is compared in infiltrationDIt is 0.32.
Embodiment 7
It is a kind of improve water resistant permeance property rubber powder aggregate concrete optimum design method, it is different from embodiment 1 it
It is in the particle size of the rubber powder of incorporation is 20 mesh, volume 10%, fine aggregate 681.3kg/m3。
Infiltration height method experiment is carried out with reference to embodiment 1, obtains relative coefficient of permeability KrsIt is 0.73 × 10-6(cm/h), it puts down
R is compared in infiltrationDIt is 0.70.
Embodiment 8
It is a kind of improve water resistant permeance property rubber powder aggregate concrete optimum design method, it is different from embodiment 1 it
It is in the particle size of the rubber powder of incorporation is 20 mesh, volume 20%, fine aggregate 605.6kg/m3。
Infiltration height method experiment is carried out with reference to embodiment 1, obtains relative coefficient of permeability KrsIt is 0.88 × 10-6(cm/h), it puts down
R is compared in infiltrationDIt is 0.78.
Embodiment 9
It is a kind of improve water resistant permeance property rubber powder aggregate concrete optimum design method, it is different from embodiment 1 it
It is in the particle size of the rubber powder of incorporation is 20 mesh, volume 30%, fine aggregate 529.9kg/m3。
Infiltration height method experiment is carried out with reference to embodiment 1, obtains relative coefficient of permeability KrsIt is 1.02 × 10-6(cm/h), it puts down
R is compared in infiltrationDIt is 0.83.
Comparative example 1
A kind of reference cement base concrete material uses the identical ratio of mud with embodiment 1, the difference is that, it does not mix
Add rubber powder, fine aggregate 757.0kg/m3。
Infiltration height method experiment is carried out with reference to embodiment 1, obtains relative coefficient of permeability KrcIt is 1.47 × 10-6(cm/h), it puts down
R is compared in infiltrationDIt is 1.00.
The average infiltration of the infiltration height test specimen of 1~embodiment of embodiment 9 and comparative example 1 is than index RDChanging rule such as
Shown in Fig. 2.As can be seen that the rubber powder aggregate concrete under each embodiment averagely permeates and compares RDBetween 0.298~0.834,
It is respectively less than 1 compared with comparative example normal concrete water resistant permeance property, shows to mix due to rubber powder and enhances concrete
Anti-permeability performance, but improve significance degree differ greatly, mainly influenced by rubber powder grain size notable.
Under same rubber powder volume level, the average infiltration ratio R of rubberized concreteDWith the increase of rubber powder grain size
And increased trend after first reduction is presented.The match ratio that grain size takes 40 mesh, volume to be 20%~30% is the relatively optimal of recommendation
Match ratio can guarantee excellent water resistant permeance property based on this rubber powder aggregate concrete material being prepared, can be used for referring to
Lead same type material mix proportion optimization design.
Gather materials green ecological concrete it is contemplated that wideling popularize high permeability resistant energy rubber powder in road and science of bridge building
Material certainly will have broad prospect of application and commercial application space.
Claims (5)
1. a kind of rubber powder aggregate concrete optimum design method improving water resistant permeance property, with rubber powder partial alternative benchmark
Fine aggregate in concrete, which is characterized in that the grain size and volume of rubber powder are by average infiltration than index RDIt determines,
Wherein, KrsWith KcsThe respectively relative coefficient of permeability of rubber powder aggregate concrete and normal concrete is based on Darcy law meters
It obtains, according to application scenarios difference, keeps normal concrete water, cement, coarse aggregate and water-reducing agent dosage constant, combine rubber
The different-grain diameter and additive amount of powder, obtain rubber powder aggregate concrete, by height method experiment of seeping water, obtain average infiltration and compare RD
Minimum optimum organization.
2. improving the rubber powder aggregate concrete optimum design method of water resistant permeance property, feature according to claim 1
It is, for rubber powder volume according in the principle incorporation normal concrete of fine aggregate volume fixed percentage, isometric replacement is corresponding
Fine aggregate, volume is respectively 10%, 20%, the 30% of fine aggregate volume, and rubber powder grain size is respectively 80 mesh, 40 mesh, 20 mesh,
It is combined experiment.
3. improving the rubber powder aggregate concrete optimum design method of water resistant permeance property, feature according to claim 1
It is, in rubber powder aggregate concrete material in addition to rubber powder and fine aggregate, other components proportioning is：Coarse aggregate 1090kg/m3；
Water-reducing agent 9.57kg/m3；Water 144kg/m3；Cement 445kg/m3；The ratio of mud 0.32；Rubber powder, group are not spiked in normal concrete
Part matches：Fine aggregate 757.0kg/m3；Coarse aggregate 1090kg/m3；Water-reducing agent 9.57kg/m3；Water 144kg/m3；Cement
445kg/m3；The ratio of mud 0.32.
4. improving the rubber powder aggregate concrete optimum design method of water resistant permeance property, feature according to claim 1
It is, in infiltration height method experiment, for the size that the infiltration height test specimen of making uses for back cut diameter 175mm, lower mouth is straight
Diameter 185mm, the round platform of high 150mm.
5. improving the rubber powder aggregate concrete optimum design method of water resistant permeance property, feature according to claim 1
It is, the basic step of the infiltration height method experiment is：
1) the infiltration height round platform test specimen made takes out after reaching 28d ages, after surface of test piece drying, is smeared in its side close
Closure material, it is ensured that water cannot be oozed out from test specimen side, and the test specimen handled well is pressed into the examination for passing through heating by screw press device
In mould；
2) start plus the water pressure test, water pressure keep 3.0 ± 0.05MPa, wait for that the time reaches and stop experiment for 24 hours；
3) test specimen of taking-up is placed on forcing press, test specimen is cleaved into two along vertical section, is retouched with prepared Chinese ink after seeing washmarking clearly
Go out, washmarking is the profile to seep water.It will be ready to be decorated with the trapezoidal glass of ten equidistant straight lines perpendicular to upper bottom surface in advance
Glass plate is placed on test specimen splitting surface, and the infiltration height of each measuring point is measured according to the washmarking described；
4) with 6 test specimens for one group, the combination of identical rubber powder grain size and volume, each test specimen test are kept with each test specimen in group
The average infiltration height of every group of test specimen of arithmetic mean of instantaneous value is calculated in the infiltration height of 10 measuring points.
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| CN201810386447.5A CN108585641A (en) | 2018-04-26 | 2018-04-26 | A kind of rubber powder aggregate concrete optimum design method improving water resistant permeance property |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879677A (en) * | 2020-07-30 | 2020-11-03 | 中铁十一局集团第五工程有限公司 | System and method for evaluating performance parameters of porous planting concrete |
| CN115304318A (en) * | 2022-03-18 | 2022-11-08 | 广州大学 | Grading rubber powder concrete with fixed particle size and preparation method thereof |
-
2018
- 2018-04-26 CN CN201810386447.5A patent/CN108585641A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879677A (en) * | 2020-07-30 | 2020-11-03 | 中铁十一局集团第五工程有限公司 | System and method for evaluating performance parameters of porous planting concrete |
| CN115304318A (en) * | 2022-03-18 | 2022-11-08 | 广州大学 | Grading rubber powder concrete with fixed particle size and preparation method thereof |
| CN115304318B (en) * | 2022-03-18 | 2023-03-21 | 广州大学 | Grading rubber powder concrete with fixed particle size and preparation method thereof |
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Application publication date: 20180928 |