CN109437757A - A kind of preparation method of pervious concrete - Google Patents
A kind of preparation method of pervious concrete Download PDFInfo
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- CN109437757A CN109437757A CN201811536171.0A CN201811536171A CN109437757A CN 109437757 A CN109437757 A CN 109437757A CN 201811536171 A CN201811536171 A CN 201811536171A CN 109437757 A CN109437757 A CN 109437757A
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- pervious concrete
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- mix
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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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
-
- 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
The invention discloses a kind of preparation methods of pervious concrete, belong to the technical field of concrete, its key points of the technical solution are that, by weight, the raw material for preparing of pervious concrete includes following components: 300-360 parts of cement, 1300-1550 parts of coarse aggregate, 12-15 parts of polypropylene fibre, 110-145 parts of water, 3.4-4.2 parts of water-reducing agent；The preparation method of pervious concrete includes following steps: step 1, and the raw material for preparing of pervious concrete is mixed, initial mix is obtained；Ice cube is added into initial mix and continues to stir 2-5min for step 2, obtains pervious concrete mix, and the additional amount of ice cube is 50-80kg/m3, the partial size before ice cube is added is 5-10mm；Step 3, after pervious concrete mix is paved, using the pressure for applying 2-4Mpa while vibration-pressure bonding forming method, i.e. vibration moulding, molding time 30-50s；Step 4, roll-in；Step 5, maintenance, the pervious concrete of acquisition can improve water penetration and compression strength simultaneously.
Description
Technical field
The present invention relates to the technical field of concrete, in particular to a kind of preparation method of pervious concrete.
Background technique
Pervious concrete is also known as celluar concrete, and non-fine concrete, permeable terrace is a kind of lightweight concrete, and inside is in
Porous honeycomb structure, has the characteristics that ventilative, permeable, light-weight, for being laid with road surface, solves conventional pav bad hydraulic permeability
Caused by the easy ponding in road surface, underground water the problems such as can not obtaining effective supplement.
Pervious concrete is usually formed by mixings such as coarse aggregate, cement, reinforcing agent and water, existing to can refer to Shen Qing Publication
Number be CN106587833A Chinese patent application, it discloses a kind of pervious concretes, be made by the raw material of following parts by weight:
1400-1600 parts of tailings stone coarse aggregate, 100-200 parts of portland cement, 100-200 parts of slag powders, polymer cementing material 5-
10 parts, 0.15-0.25 parts of additive, 90-100 parts of water, wherein polymer cementing material is redispersible latex powder and fiber
The mixture of plain ether, additive, which is that powdery is poly-, completes sour water-reducing agent.
The preparation step of pervious concrete generally includes: mixing → casting of each raw material component → vibration pressure → roll-in →
Maintenance.The compression strength and water penetration of pervious concrete are to measure the important indicator of its performance, however, actually preparing or constructing
Cheng Zhong, the compression strength and water penetration of pervious concrete tend not to improve simultaneously.This is because the preparation work of pervious concrete
Sequence often generates opposite influence to the above two performance of pervious concrete, for example, although vibration pressure and calandering steps are conducive to
Enhance the compression strength of pervious concrete, but it can also destroy the hole in pervious concrete to the impact and compacting of pervious concrete
Shape structure causes the water penetration of pervious concrete to decline.
Summary of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of preparation method of pervious concrete, to reach while improve thoroughly
The water penetration of water coagulation soil and the effect of compression strength.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of preparation method of pervious concrete, which is characterized in that
By weight, the raw material for preparing of pervious concrete includes following components: 300-360 parts of cement, coarse aggregate 1300-
1550 parts, 12-15 parts of polypropylene fibre, 110-145 parts of water, 3.4-4.2 parts of water-reducing agent；
The preparation method of pervious concrete includes following steps:
The raw material for preparing of pervious concrete is mixed, obtains initial mix by step 1；
Ice cube is added into initial mix and continues to stir 2-5min for step 2, obtains pervious concrete mix, and ice cube adds
Entering amount is 50-80kg/m3, the partial size before ice cube is added is 5-10mm；
Step 3, after pervious concrete mix is paved, using vibration-pressure bonding forming method, i.e., vibration moulding is same
When apply 2-4Mpa pressure, molding time 30-50s；
Step 4, roll-in；
Step 5, maintenance.
By using above scheme, preparation method of the invention improves pressure when vibration-pressure bonding molding, improves
The compactness of pervious concrete, and the compressive property of pervious concrete is therefore improved, during vibration-pressure bonding molding,
Although pervious concrete mix is not distributed the hole of the part of ice cube by a degree of destruction, due to permeable mixed
Contain ice cube in solidifying soil mix, ice cube occupies the space in the pervious concrete mix of part, solidifies in pervious concrete
Afterwards, ice cube gradually melts, and the space that ice cube initially occupies is retained, and forms hole.Since the hydro-thermalization of cement acts on, thoroughly
A large amount of heat can be discharged inside water coagulation soil mix, ice cube will appear thawing phenomenon, so, to the additional amount and ice of ice cube
The Particle size requirements of block are higher, the additional amount of preparation method strict control ice cube of the invention and the partial size of ice cube, so that ice cube shape
At hole be more than the hole that is destroyed, and thus improve the water permeability of pervious concrete.
Further, since the hydro-thermalization of cement acts on, a large amount of heat can be discharged inside pervious concrete mix, is caused
Water coagulation soil is internal larger with the temperature difference of external environment, so that pervious concrete mix is easy to appear cracking in process of setting
Phenomenon seriously affects the molding compression strength of pervious concrete.And in the present invention, the addition of ice cube can mix pervious concrete
Cooling effect is played in the inside for closing material, reduces the internal-external temperature difference in pervious concrete process of setting, mitigates opening for pervious concrete
Phenomenon is split, the compression strength of pervious concrete is improved.
The present invention is further arranged to: the raw material for preparing of the pervious concrete includes following components: 330 parts of cement,
1450 parts of coarse aggregate, 14 parts of polypropylene fibre, 130 parts of water, 3.8 parts of water-reducing agent；The additional amount of step 2 medium floe is 70kg/
m3。
By using above scheme, the proportion of pervious concrete of the invention is reasonable, can effectively mitigate pervious concrete
The hydro-thermal phenomenon of mix reduces the internal-external temperature difference in pervious concrete process of setting, and then improves the anti-of pervious concrete
Compressive Strength.Experimental data shows that the compression strength of pervious concrete made from said ratio is higher.
The present invention is further arranged to: the additional amount of step 2 medium floe is 70kg/m3。
The present invention is further arranged to: in the step 2, ice cube being added into initial mix and continues to stir 3min.
By using above scheme, the mixing time of pervious concrete mix is controlled, under the premise of stirring evenly, to the greatest extent
Amount shortens mixing time, mitigates the thawing phenomenon of ice cube.
The present invention is further arranged to: in the step 3, applying the pressure of 3Mpa, molding time while vibration moulding
For 40s.
By using above scheme, suitable vibration moulding pressure is set, it can be in the crushing resistance for improving pervious concrete
Under the premise of energy, mitigate the destruction to pervious concrete mix internal void, experimental data is shown, obtained under above-mentioned pressure
The water permeability and compression strength of pervious concrete are higher.
The present invention is further arranged to: in the step 1, the preparation of initial mix includes:
30-60s is mixed in coarse aggregate and the water of half weight, then, adds cement and 30- is mixed in polypropylene fibre
60s obtains the first initial mix；
Water-reducing agent is dissolved in the water of half weight, obtains the second solution；
5-8min is mixed in first initial mix and the second solution, obtains initial mix.
The present invention is further arranged to: the diameter of the polypropylene fibre is 1-1.5mm, length 60-80mm.
The present invention is further arranged to: the cement is PII42.5R cement.
The present invention is further arranged to: the coarse aggregate is the rubble of partial size 5-10mm.
The present invention is further arranged to: the water-reducing agent is polycarboxylate water-reducer.
In conclusion the invention has the following advantages:
1, by the way that ice cube is added in concrete mix, the compression strength and water penetration for overcoming current pervious concrete are often
The defect that cannot be improved simultaneously, the pervious concrete of acquisition compression strength and water penetration with higher simultaneously；
2, the ice cube being added in concrete mix plays good cooling effect to the inside of pervious concrete mix, subtracts
Internal-external temperature difference in small pervious concrete process of setting, alleviates the cracking phenomena of pervious concrete, improves permeable coagulation
The compression strength of soil；
3, the proportion of pervious concrete is reasonable, can effectively mitigate the hydro-thermal phenomenon of pervious concrete mix, reduces permeable
Internal-external temperature difference during concrete setting, and then improve the compression strength of pervious concrete.
Specific embodiment
Invention is further described in detail below.
For the diameter of the polypropylene fibre used in following embodiment for 1-1.5mm, the length of polypropylene fibre is 60-
80mm, cement are PII42.5R cement, and coarse aggregate is the rubble of partial size 5-10mm, and water-reducing agent is polycarboxylate water-reducer, ice cube
Partial size is 5-10mm.
Embodiment 1
A kind of preparation method of pervious concrete, by weight, preparing raw material includes following components: 300 parts of cement, thick bone
Expect 1300 parts, 12 parts of polypropylene fibre, 110 parts of water, 3.4 parts of water-reducing agent；
Preparation method includes following steps:
30s is mixed in the water of step 1, coarse aggregate and half weight, then, adds cement and polypropylene fibre mixing is stirred
30s is mixed, the first initial mix is obtained；Water-reducing agent is dissolved in the water of half weight, obtains the second solution；By the first initial mix
5min is mixed with the second solution, obtains initial mix；
Ice cube is added into initial mix and continues to stir 2min, obtains pervious concrete mix, the addition of ice cube for step 2
Amount is 50kg/m3；
Step 3, after pervious concrete mix is paved, using vibration-pressure bonding forming method, i.e., vibration moulding is same
When apply 2Mpa pressure, molding time 30s；
Step 4, roll-in；
Step 5, maintenance.
Embodiment 2
A kind of preparation method of pervious concrete, by weight, preparing raw material includes following components: 330 parts of cement, thick bone
Expect 1450 parts, 14 parts of polypropylene fibre, 130 parts of water, 3.8 parts of water-reducing agent；
Preparation method includes following steps:
45s is mixed in the water of step 1, coarse aggregate and half weight, then, adds cement and polypropylene fibre mixing is stirred
45s is mixed, the first initial mix is obtained；Water-reducing agent is dissolved in the water of half weight, obtains the second solution；By the first initial mix
7min is mixed with the second solution, obtains initial mix；
Ice cube is added into initial mix and continues to stir 3min, obtains pervious concrete mix, the addition of ice cube for step 2
Amount is 70kg/m3；
Step 3, after pervious concrete mix is paved, using vibration-pressure bonding forming method, i.e., vibration moulding is same
When apply 3Mpa pressure, molding time 40s；
Step 4, roll-in；
Step 5, maintenance.
Embodiment 3
A kind of preparation method of pervious concrete, by weight, preparing raw material includes following components: 360 parts of cement, thick bone
Expect 1550 parts, 15 parts of polypropylene fibre, 145 parts of water, 4.2 parts of water-reducing agent；
Preparation method includes following steps:
60s is mixed in the water of step 1, coarse aggregate and half weight, then, adds cement and polypropylene fibre mixing is stirred
60s is mixed, the first initial mix is obtained；Water-reducing agent is dissolved in the water of half weight, obtains the second solution；By the first initial mix
8min is mixed with the second solution, obtains initial mix；
Ice cube is added into initial mix and continues to stir 5min, obtains pervious concrete mix, the addition of ice cube for step 2
Amount is 80kg/m3；
Step 3, after pervious concrete mix is paved, using vibration-pressure bonding forming method, i.e., vibration moulding is same
When apply 4Mpa pressure, molding time 50s；
Step 4, roll-in；
Step 5, maintenance.
Embodiment 4
A kind of preparation method of pervious concrete, the present embodiment are carried out according to the method for embodiment 2, the difference is that, by weight
Measure part meter, preparing raw material includes following components: 300 parts of cement, 1300 parts of coarse aggregate, 12 parts of polypropylene fibre, 110 parts of water,
3.4 parts of water-reducing agent.
Embodiment 5
A kind of preparation method of pervious concrete, the present embodiment are carried out according to the method for embodiment 2, the difference is that, by weight
Measure part meter, preparing raw material includes following components: 360 parts of cement, 1550 parts of coarse aggregate, 15 parts of polypropylene fibre, 145 parts of water,
4.2 parts of water-reducing agent.
Embodiment 6
A kind of preparation method of pervious concrete, the present embodiment are carried out according to the method for embodiment 2, the difference is that, step
In two, the additional amount of ice cube is 50kg/m3。
Embodiment 7
A kind of preparation method of pervious concrete, the present embodiment are carried out according to the method for embodiment 2, the difference is that, step
In two, the additional amount of ice cube is 80kg/m3。
Embodiment 8
A kind of preparation method of pervious concrete, the present embodiment are carried out according to the method for embodiment 2, the difference is that, step
In three, apply the pressure of 2Mpa while vibration moulding.
Embodiment 9
A kind of preparation method of pervious concrete, the present embodiment are carried out according to the method for embodiment 2, the difference is that, step
In three, apply the pressure of 4Mpa while vibration moulding.
Comparative example 1
A kind of preparation method of pervious concrete, the present embodiment are carried out according to the method for embodiment 2, the difference is that, step
In two, ice cube is not added into initial mix, initial mix is continued to stir 3min merely, obtains pervious concrete mix
Material.
Comparative example 2
A kind of preparation method of pervious concrete, the present embodiment are carried out according to the method for embodiment 2, the difference is that:
In step 2, ice cube is not added into initial mix, initial mix is continued to stir 3min merely, obtains permeable mixed
Solidifying soil mix；
In step 3, apply the pressure of 0.8Mpa while vibration moulding.
Performance detection is according to the regulation in CJJ/T135-2009 " water-permeable cement concrete pavement technique regulation " to above-mentioned
Water coagulation soil is detected, and testing result is as shown in table 1.
| Sample | Compression strength (Mpa) | Coefficient of permeability (mm/s) |
| Embodiment 1 | 44.7 | 10.9 |
| Embodiment 2 | 46.3 | 12.2 |
| Embodiment 3 | 45.2 | 11.7 |
| Embodiment 4 | 42.1 | 12.1 |
| Embodiment 5 | 42.6 | 11.8 |
| Embodiment 6 | 46.5 | 11.1 |
| Embodiment 7 | 44.3 | 12.3 |
| Embodiment 8 | 45.2 | 12.5 |
| Embodiment 9 | 46.7 | 10.3 |
| Comparative example 1 | 46.8 | 5.2 |
| Comparative example 2 | 40.5 | 7.8 |
It can be seen from comparative example 1 and comparative example 2 in table 1 in the case where being added without ice cube, vibration moulding is improved
After pressure, the compressive property of the pervious concrete of acquisition is improved, but coefficient of permeability reduces, this is because when vibration moulding,
Biggish pressure can destroy the cavernous structure in pervious concrete, and the water penetration of pervious concrete is caused to decline.
And it can be seen from embodiment 2 and comparative example 2 after ice cube is added and improves the pressure of vibration moulding, it is permeable
The compressive property and coefficient of permeability of concrete improve, this is because, on the one hand, improve pressure when vibration-pressure bonding molding
Power, be conducive to improve pervious concrete compactness, thus improve pervious concrete compressive property, vibration-pressure bonding at
During type, although pervious concrete mix is not distributed the hole of the part of ice cube by a degree of destruction, due to
Contain ice cube in pervious concrete mix, ice cube occupies the space in the pervious concrete mix of part, in permeable coagulation
After soil solidification, ice cube gradually melts, and the space that ice cube initially occupies is retained, and forms hole.Preparation method of the invention
Thus the additional amount of strict control ice cube and the partial size of ice cube so that the hole that ice cube is formed is more than the hole being destroyed, and mention
The water permeability of high pervious concrete.In addition, ice cube plays good cooling effect to the inside of pervious concrete mix,
The internal-external temperature difference in pervious concrete process of setting is reduced, the cracking phenomena of pervious concrete is which reduced, it is equally advantageous
In the compression strength for improving pervious concrete.
The pressure resistance with comparison pervious concrete for preparing raw material of pervious concrete it can be seen from embodiment 2,4 and 5
Degree has larger impact, and the proportion in embodiment 2 is more preferably, this is because proportion reasonably prepare raw material can effectively mitigate it is permeable
The hydro-thermal phenomenon of concrete mix reduces the internal-external temperature difference in pervious concrete process of setting, and then improves permeable coagulation
The compression strength of soil.
Above-mentioned specific embodiment is only explanation of the invention, is not limitation of the present invention, art technology
Personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as
All by the protection of Patent Law in scope of the presently claimed invention.
Claims (10)
1. a kind of preparation method of pervious concrete, which is characterized in that
By weight, the raw material for preparing of pervious concrete includes following components: 300-360 parts of cement, coarse aggregate 1300-
1550 parts, 12-15 parts of polypropylene fibre, 110-145 parts of water, 3.4-4.2 parts of water-reducing agent；
The preparation method of pervious concrete includes following steps:
The raw material for preparing of pervious concrete is mixed, obtains initial mix by step 1；
Ice cube is added into initial mix and continues to stir 2-5min for step 2, obtains pervious concrete mix, and ice cube adds
Entering amount is 50-80kg/m3, the partial size before ice cube is added is 5-10mm；
Step 3, after pervious concrete mix is paved, using vibration-pressure bonding forming method, i.e., vibration moulding is same
When apply 2-4Mpa pressure, molding time 30-50s；
Step 4, roll-in；
Step 5, maintenance.
2. a kind of preparation method of pervious concrete according to claim 1, it is characterised in that: the pervious concrete
Preparing raw material includes following components: 330 parts of cement, 1450 parts of coarse aggregate, 14 parts of polypropylene fibre, 130 parts of water, water-reducing agent
3.8 part.
3. a kind of preparation method of pervious concrete according to claim 1, it is characterised in that: step 2 medium floe adds
Entering amount is 70kg/m3。
4. a kind of preparation method of pervious concrete according to claim 1, it is characterised in that: in the step 2, to
Ice cube is added in initial mix to continue to stir 3min.
5. a kind of preparation method of pervious concrete according to claim 1, it is characterised in that: in the step 3, vibration
Apply the pressure of 3Mpa, molding time 40s while dynamic molding.
6. a kind of preparation method of pervious concrete according to claim 1, which is characterized in that in the step 1, just
The preparation of beginning mix includes:
30-60s is mixed in coarse aggregate and the water of half weight, then, adds cement and 30- is mixed in polypropylene fibre
60s obtains the first initial mix；
Water-reducing agent is dissolved in the water of half weight, obtains the second solution；
5-8min is mixed in first initial mix and the second solution, obtains initial mix.
7. the preparation method of -6 any a kind of pervious concretes according to claim 1, it is characterised in that: the polypropylene
The diameter of fiber is 1-1.5mm, length 60-80mm.
8. the preparation method of -6 any a kind of pervious concretes according to claim 1, it is characterised in that: the cement is
PII42.5R cement.
9. the preparation method of -6 any a kind of pervious concretes according to claim 1, it is characterised in that: the coarse aggregate
For the rubble of partial size 5-10mm.
10. the preparation method of -6 any a kind of pervious concretes according to claim 1, it is characterised in that: the diminishing
Agent is polycarboxylate water-reducer.
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| CN110436843A (en) * | 2019-08-28 | 2019-11-12 | 黄贺明 | Artificial porous volcanic rock slabstone of one kind and preparation method thereof |
| CN113233852A (en) * | 2021-05-25 | 2021-08-10 | 广东能达高等级公路维护有限公司 | Preparation method for preparing high-strength anti-fracture concrete by using waste materials |
| CN113295484A (en) * | 2021-04-21 | 2021-08-24 | 重庆交通大学 | Method for manufacturing concrete test piece for simulating water-containing cavity defect |
| CN114394846A (en) * | 2022-01-26 | 2022-04-26 | 广东华南混凝土有限公司 | Environment-friendly water-permeable corrosion-resistant concrete and preparation method thereof |
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| CN114394846A (en) * | 2022-01-26 | 2022-04-26 | 广东华南混凝土有限公司 | Environment-friendly water-permeable corrosion-resistant concrete and preparation method thereof |
| CN114394846B (en) * | 2022-01-26 | 2022-11-08 | 广东华南混凝土有限公司 | Environment-friendly water-permeable corrosion-resistant concrete and preparation method thereof |
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