CN110482921A - Pervious concrete - Google Patents
Pervious concrete Download PDFInfo
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- CN110482921A CN110482921A CN201910851041.4A CN201910851041A CN110482921A CN 110482921 A CN110482921 A CN 110482921A CN 201910851041 A CN201910851041 A CN 201910851041A CN 110482921 A CN110482921 A CN 110482921A
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- pervious concrete
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- flyash
- mass fraction
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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
-
- 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
- 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
- C04B2111/2038—Resistance against physical degradation
-
- 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 pervious concretes, which is characterized in that according to mass fraction, the pervious concrete is prepared from the following components: 1500~1600 parts of coarse aggregate, 320~420 parts of glue material, 105~114 parts of water and 4.5~5.9 parts of water-reducing agent.Abrasion resistant materials in present invention proportion, effect is cut down with significant plasticization effect, micro aggregate effect, shape effect and warm peak, can microstructure continuous grading by itself excellent characteristics and to cementitious material improvement, mechanical property, the abrasion resisting, abrasion resistance energy, the durability to improve pervious concrete for improving pervious concrete, increase its service life.
Description
Technical field
The invention belongs to building material technical fields, and in particular to a kind of pervious concrete.
Background technique
Country proposes and appeals construction " sponge city " energetically, i.e., in rainfall, city, which should have, preferably absorbs water, storage
Water, purified water and the ability for permeating water are permeated the moisture of earth's surface by itself and base, to reduce earth's surface diameter
Stream keeps level of ground water, purifies water while the load of sewerage system and the rain water-harvesting of low laying areas is effectively reduced.
As the key material in sponge city, pervious concrete also rapidly develops therewith, due to existing pervious concrete mechanical property
Energy poor (compression strength of practical pervious concrete about 20MPa, flexural strength about 2MPa in engineering construction), along with permeable mixed
The particularity of Xtah Crude Clay structure, intergranular space is big, and bonding force is poor, and stress is concentrated, and grain is also easy to produce under dynamic load, forms crack
Deng, therefore pervious concrete is mainly used in the low load road surface such as parking lot, park, pavement at this stage.
The special leakiness structure of pervious concrete, causes it internal and surface has a larger hole, cementitious material with
Aggregate contact area is small, and under load action, hole tip easily occurs stress and concentrates, the destruction and extension cracked, thus
Cause skin granulate fall off and pavement cracking destroy.At the scene in work progress, common method is the addition permeable coagulation of finished product
Native reinforcing agent improves its mechanical property.But it in actual use, is mixed since finished product reinforcing agent has water-reduction simultaneously
Amount while the Construction State for affecting pervious concrete, volume is very few, and the pervious concrete mix of new mixing is partially dry, cohesive force
Difference, mechanical property is low, and volume is excessive, and a series of problems, such as partially dilute or even bleeding, hardened, slurry occurs in pervious concrete mix
Can not uniform package aggregate, cause construction after mechanical performance of concrete is poor, does not have water permeability.In addition, reinforcing agent is with activity
Silica is primary raw material, and concrete early hydration heat significantly improves after incorporation, is exacerbated while improving mechanical property mixed
The drying shrinkage of solidifying soil cementitious material leads to the generation of early stage microcrack, and then further cracks during concrete is on active service, because
This, reinforcing agent is only limitted to use under the fixed volume of manufacturer's recommended, relatively limited raising pervious concrete intensity, the crack Yi Yinfa
Problem.
Summary of the invention
The purpose of the invention is to the Extensives encountered during overcoming existing pervious concrete to promote and apply to ask
Topic, provides a kind of erosion resistant high-performance permeable concrete.
The purpose of the present invention is achieved through the following technical solutions:
The present invention provides a kind of pervious concrete, according to mass fraction, the pervious concrete by following components prepare and
At: 1500~1600 parts of coarse aggregate, 320~420 parts of glue material, 105~114 parts of water and 4.5~5.9 parts of water-reducing agent.
Preferably, according to mass fraction, the pervious concrete is prepared from the following components: coarse aggregate 1542~
1580 parts, 368~400 parts of glue material, 110~114 parts of water and 5.1~5.5 parts of water-reducing agent.
Preferably, the coarse aggregate is selected from limestone aggregate, granite aggregate or basalt aggregate, the grain of the coarse aggregate
Diameter is 5~10mm.Preferably, the glue material is selected from cement, flyash, silicon ash, resistance to abrasion material;The mass parts of the cement
Number is 240~357 parts, the mass fraction of flyash is 16~84 parts, the mass fraction of silicon ash is 16~42 parts, resistance to abrasion material
The mass fraction of material is 16~42 parts.
Flyash and silicon ash replace incorporation of the part of cement as gel rubber material in glue material, ensure that pervious concrete respectively
Early strength and durability, pervious concrete 28d compression strength is up to 30MPa~40MPa, and flexural strength reaches 4.0MPa, thoroughly
Water coefficient reaches 2.5mm/s, and anti-abrasion strength is up to 4.76 (h/kg/m2), more common pervious concrete mechanical property, abrasion resistance
And durability significantly improves, efficiently solve in pervious concrete application process it is common cause because intensity is too low cracking destruction and and
Surface abrasion, a series of problems, such as falling.
Preferably, the resistance to abrasion material is selected from one or both of silicon nitride or silicon carbide, the resistance to abrasion
The Mohs' hardness of material is more than or equal to 9.5, and granularity is 1~10 μm.
Preferably, for the partial size of the silicon ash less than 1 μm, average specific surface area is greater than 1.5 × 104m2/kg。
Preferably, the flyash is I grade or II grade of flyash.
Preferably, the average grain diameter of the flyash be 10~30 μm, the composition of the flyash include hollow heavy pearl and
Solid heavy pearl, the solid heavy pearl are Silicon-rich aluminium microballon.
Preferably, the water-reducing agent is collapse protective poly-carboxylic acid high-performance water reducing agent.
Preferably, the mass ratio of the flyash, silicon ash and resistance to abrasion material is 1~2:1:1.
Preferably, water and the mass ratio of glue material are 0.27~0.33:1 in the pervious concrete.
Compared with the existing technology, the beneficial effects of the present invention are:
Pervious concrete provided by the invention effectively improves existing pervious concrete because of self structure problem and load
Under the conditions of the lower crack being also easy to produce of intensity, cracking phenomena and local friction excessive (such as vehicle is brought to a halt) or surface layer it is thick
The too low caused surface abrasion of a bond strength of gathering materials falls a phenomenon.The pervious concrete is on the basis of meeting water penetration, tool
There is the characteristics of high intensity, erosion resistant, excellent durability.
Pervious concrete in the present invention changes the form of the existing reinforcing agent diminishing in market, controls it using water-reducing agent and subtracts
Aqueous energy, polynary gel powder collocation use, and make the content of each mineral admixture in pervious concrete proportion can be according to mechanical property
The demand of energy is adjusted, and configures high-intensitive pervious concrete on the basis of guaranteeing pervious concrete mix state.
Silicon ash be common concrete mineral admixture, partial size less than 1 μm, average specific surface area be greater than 1.5 ×
104m2/ kg after equivalent replaces cement, can effectively reduce the isolation of fresh concrete slurry, reduce the mix slump, improve slurry
The cohesiveness of body.Due to the high volcano ash effect and specific surface area of silicon ash, hydrated cementitious is effectively facilitated, keeps early hydration heat significant
It improves, early stage adiabatic temperature rise improves, and exothermic peak occurs in advance.After adding silicon ash, 28 days compression strength of concrete can be effectively improved
50~80%, slurry density and durability also significantly improve.
Silicon carbide (or silicon nitride) is not common concrete mineral admixture, and because not having active effect, nothing is used alone
Method improves concrete strength, therefore less is used in concrete.Resistance to abrasion material silicon carbide (or the nitrogen added in the present invention
SiClx), stable chemical performance, grain diameter is 1~10 μm.Silicon carbide (or silicon nitride) rigidity is big, and Mohs' hardness is
9.5 grades, be only second to diamond most hard in the world (10 grades), itself wear-resisting property with super strength, frequently as high-quality abrasive material into
It exercises and uses.Since its density is much smaller than cement, after it waits mass substitutions cement, slurry volume becomes larger in concrete, has aobvious
The plasticization effect of work.Silicon carbide (or silicon nitride) microscopic particles are ball-point pen type, and partial size is less than flyash, have significant ball
Effect (shape effect), can improve the workability of pervious concrete mix, improve the mobility of concrete batching system, slow down and mix
With the slump-loss of object, it is conducive to construction.
Silicon carbide (or silicon nitride) thermal expansion coefficient is small, itself has good thermal conductivity, and chemical property is stablized, and has aobvious
Cut down effect in the warm peak of work.Caused by being effectively improved after incorporation because of the reaction of the fast hydration of cement and other mineral admixtures absolutely
The problems such as hot temperature increases, improves the heating conduction of concrete, further decreases the dry-shrinkage deformed of concrete and shrinks, is effectively reduced
The generation of microcrack, and then the cracking of pervious concrete is reduced, improve its durability.
The average grain diameter of flyash is 10~30 μm, is mainly organized as the solid heavy pearl of Silicon-rich aluminium, because its surface is smooth, ball
Shape degree is good, has good shape effect, can be improved the mobility and density of fresh concrete, reduces unit volume water
The problem of amount, bleeding, isolation and slump-loss, is applied in concrete as mineral admixture.In addition, the fire of flyash
Mountain ash reaction speed is slower, reduces the heat release rate of concrete, and temperature release time extends, and temperature increases peak value and reduces,
The generation of microcrack is effectively reduced.After secondary reaction of hydration, the compactness of concrete is improved, improves hardened paste-aggregate
Interface, to further increase the later strength of concrete.
Erosion resistant agent is increased in the present invention, silicon ash and flyash are used in combination according to a certain ratio, (flat with cement granules
Equal partial size is 20~30 μm) the continuous all grades of microcosmic colloid are formed, effective intergranular slight void of filling concrete makes to be gelled
The compactness of material increases, interface of the significant stress plane of weakness-for improving pervious concrete between cementitious material and aggregate, thus
The mechanical property for improving pervious concrete reduces the cracking of concrete and falls a phenomenon.The rational gradation composition item of three kinds of admixtures
Under part, the early strength of pervious concrete, durability after silicon ash improves mix cohesiveness and hardens;Silicon carbide (or silicon nitride)
The workability for improving mix reduces the adiabatic temperature rise in course of hardening, reduces cracking risk, mixes after improving hardening
Soil wearability is coagulated, the later strength of pervious concrete after the workability of flyash raising mix and hardening.
Specific embodiment
Many details are explained in the following description in order to fully understand the application.But the application can be with
Much it is different from other way described herein to implement, those skilled in the art can be without prejudice to the application intension the case where
Under do similar popularization, therefore the application is not limited by following public specific implementation.
The embodiment of the present invention provides a kind of pervious concrete, and according to mass fraction, the pervious concrete is by following components
It is prepared: 1500~1600 parts of coarse aggregate, 320~420 parts of glue material, 105~114 parts of water and 4.5~5.9 parts of water-reducing agent.
In some embodiments, the mass fraction of the coarse aggregate be 1500 parts, 1510 parts, 1520 parts, 1542 parts,
1550 parts, 1560 parts, 1570 parts, 1580 parts, 1590 parts or 1600 parts.
In some embodiments, the mass fraction of the glue material is 320 parts, 330 parts, 340 parts, 350 parts, 368 parts, 370
Part, 380 parts, 390 parts, 400 parts, 410 parts or 420 parts.
In some embodiments, the mass fraction of the water is 105 parts, 106 parts, 107 parts, 108 parts, 109 parts, 110
Part, 111 parts, 112 parts, 113 parts or 114 parts.
In the present embodiment, the coarse aggregate is selected from limestone aggregate, granite aggregate or basalt aggregate, the coarse aggregate
Partial size be 5~10mm.In the present embodiment, the glue material is selected from cement, flyash, silicon ash, resistance to abrasion material;The cement
Mass fraction be 240~357 parts, the mass fraction of flyash is 16~84 parts, the mass fraction of silicon ash is 16~42 parts, resistance to
The mass fraction of abrasive material is 16~42 parts.
In some embodiments, the mass fraction of the cement is 240 parts, 257 parts, 273 parts, 280 parts, 290 parts, 300
Part, 312 parts, 323 parts, 235 parts, 340 parts, 348 parts or 357 parts.
In some embodiments, the mass fraction of the flyash be 16 parts, 22 parts, 25 parts, 30 parts, 35 parts, 37 parts,
40 parts, 42 parts, 45 parts, 50 parts, 55 parts, 58 parts, 60 parts, 63 parts, 65 parts, 67 parts, 70 parts, 72 parts, 75 parts, 80 parts, 82 parts or
84 parts.
In some embodiments, the mass fraction of the silicon ash is 16 parts, 20 parts, 23 parts, 25 parts, 28 parts, 30 parts, 32
Part, 35 parts, 37 parts, 39 parts, 40 parts or 42 parts.
In some embodiments, the mass fraction of the resistance to abrasion material be 16 parts, 20 parts, 23 parts, 25 parts, 28 parts,
30 parts, 32 parts, 35 parts, 37 parts, 39 parts, 40 parts or 42 parts.
In the present embodiment, the resistance to abrasion material is selected from one or both of silicon nitride or silicon carbide, described wear-resisting
The Mohs' hardness of corrosion material is more than or equal to 9.5, and granularity is 1~10 μm.
In the present embodiment, for the partial size of the silicon ash less than 1 μm, average specific surface area is greater than 1.5 × 104m2/kg。
In the present embodiment, the flyash is I grade or II grade of flyash.
In the present embodiment, the average grain diameter of the flyash is 10~30 μm, and the composition of the flyash includes hollow heavy
Pearl and solid heavy pearl, the solid heavy pearl are Silicon-rich aluminium microballon.
In the present embodiment, the water-reducing agent is collapse protective poly-carboxylic acid high-performance water reducing agent.
In the present embodiment, the mass ratio of the flyash, silicon ash and resistance to abrasion material is 1~2:1:1.
In the present embodiment, water and the mass ratio of glue material are 0.27~0.33:1 in the pervious concrete.
Technical solution of the present invention is illustrated below with reference to specific embodiment.
Embodiment 1
The present embodiment provides a kind of pervious concretes, and according to mass fraction, the pervious concrete is prepared by following components
Form: limestone aggregate 1500kg, cement 240kg, silicon ash 32kg, silicon nitride 32kg, flyash 16kg, water-reducing agent 4.5kg and
Water 105kg.
Embodiment 2
The present embodiment provides a kind of pervious concretes, and according to mass fraction, the pervious concrete is prepared by following components
Form: granite aggregate 1542kg, cement 257kg, silicon ash 37kg, silicon nitride 37kg, flyash 37kg, water-reducing agent 5.1kg and
Water 110kg.
Embodiment 3
The present embodiment provides a kind of pervious concretes, and according to mass fraction, the pervious concrete is prepared by following components
Form: basalt aggregate 1600kg, cement 273kg, silicon ash 42kg, silicon carbide 42kg, flyash 63kg, water-reducing agent 5.9kg and
Water 114kg.
Test result compares:
Carry out test by taking limestone aggregate 1500kg, glue material 320kg, water-cement ratio 0.27, water consumption 105kg as an example, wherein
1 glue material group is tested as cement 100%, 2 glue material groups of test become cement 90%+ silicon ash 10%, and 3 glue material groups of test become cement
90%+ flyash 10%, test 4 are cement 90%+ silicon carbide 10%, and test 5 is cement 80%+ silicon ash 10%+ silicon carbide 5%
+ flyash 5% carries out mechanical property test respectively and wash-resistant and abrasion-resistant test, test result is as shown in table 2:
The test result of the different glue material type pervious concretes of table 2 summarizes
By can see in table, compared with reference test (test 1), the independent admixture silicon ashes of test 2 are remarkably improved permeable
28 days compression strength of concrete, flexural strength also make moderate progress, and anti-abrasion strength improves 7.49%, and test 3 is demonstrate,proved with test 4
Bright, when independent adding coal ash or silicon carbide, mechanical property has different degrees of decline, but tests under 4 anti-abrasion strength
Range of decrease degree is significantly less than test 3, and after three of the above admixture is used in mixed way, compression strength improves 20.15%, flexural strength
20.34% is improved, anti-abrasion strength improves 14.98%, and pervious concrete indices significantly improve.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit any simple modification, change and equivalent transformation to the above embodiments, still fall within the technology of the present invention side
In the protection scope of case.
Claims (10)
1. pervious concrete, which is characterized in that according to mass fraction, the pervious concrete is prepared from the following components: thick
1500~1600 parts of aggregate, 320~420 parts of glue material, 105~114 parts of water and 4.5~5.9 parts of water-reducing agent.
2. pervious concrete according to claim 1, which is characterized in that according to mass fraction, the pervious concrete by
Following components is prepared: 1542~1580 parts of coarse aggregate, 368~400 parts of glue material, 110~114 parts of water and water-reducing agent 5.1~
5.5 part.
3. pervious concrete according to claim 1, which is characterized in that the coarse aggregate is selected from limestone aggregate, Hua Gang
Petrous bone material or basalt aggregate, the partial size of the coarse aggregate are 5~10mm.
4. pervious concrete according to claim 1, which is characterized in that the glue material be selected from cement, flyash, silicon ash,
Resistance to abrasion material;The mass fraction of the cement is 240~357 parts, the mass fraction of flyash is 16~84 parts, silicon ash
Mass fraction is 16~42 parts, the mass fraction of resistance to abrasion material is 16~42 parts.
5. pervious concrete according to claim 1, which is characterized in that the resistance to abrasion material is selected from silicon nitride or carbon
One or both of SiClx, the Mohs' hardness of the resistance to abrasion material are more than or equal to 9.5, and granularity is 1~10 μm.
6. pervious concrete according to claim 4, which is characterized in that the partial size of the silicon ash is less than 1 μm, average specific table
Area is greater than 1.5 × 104m2/kg。
7. pervious concrete according to claim 4, which is characterized in that the flyash is I grade or II grade of flyash.
8. pervious concrete according to claim 7, which is characterized in that the average grain diameter of the flyash is 10~30 μ
M, the composition of the flyash include hollow heavy pearl and solid heavy pearl, and the solid heavy pearl is Silicon-rich aluminium microballon.
9. pervious concrete according to claim 1, which is characterized in that the water-reducing agent is collapse protective poly-carboxylic acid high-performance
Water-reducing agent.
10. pervious concrete according to claim 1, which is characterized in that the flyash, silicon ash and resistance to abrasion material
Mass ratio be 1~2:1:1;Water and the mass ratio of glue material are 0.27~0.33:1 in the pervious concrete.
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CN201910851041.4A CN110482921A (en) | 2019-09-10 | 2019-09-10 | Pervious concrete |
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CN201910851041.4A CN110482921A (en) | 2019-09-10 | 2019-09-10 | Pervious concrete |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111689726A (en) * | 2020-06-16 | 2020-09-22 | 重庆天地人建设集团有限公司 | Ultrahigh-pressure long-distance pumping concrete and preparation method thereof |
CN111978047A (en) * | 2020-09-04 | 2020-11-24 | 中国水利水电第三工程局有限公司 | High-performance pervious concrete and application thereof |
CN112125615A (en) * | 2020-10-21 | 2020-12-25 | 青岛合汇混凝土工程有限公司 | Pervious concrete and preparation method thereof |
CN112279676A (en) * | 2020-11-06 | 2021-01-29 | 江苏恒达工程检测有限公司 | High-strength lightweight concrete for pipeline repair and preparation method thereof |
CN112897957A (en) * | 2021-03-25 | 2021-06-04 | 中交二公局第三工程有限公司 | High-pressure-resistance silica fume pervious concrete and preparation method thereof |
CN115925385A (en) * | 2023-01-14 | 2023-04-07 | 禹智环保科技(深圳)有限公司 | High-strength premixed pervious concrete and preparation method thereof |
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CN103044010A (en) * | 2013-01-07 | 2013-04-17 | 西安维乐抗磨工程技术有限公司 | Anti-permeability and anti-freezing-thawing composite wearproof lining material and preparation method |
CN104386954A (en) * | 2014-10-16 | 2015-03-04 | 同济大学 | Silicon carbide waste reinforced wear-resistant floor mortar and its preparation method |
CN107268643A (en) * | 2017-07-03 | 2017-10-20 | 华北水利水电大学 | A kind of permeable Ecological Slope structure of soil conservation |
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CN1749201A (en) * | 2005-08-04 | 2006-03-22 | 上海交通大学 | Flyash water permeating road surface concrete |
KR20120108688A (en) * | 2011-03-25 | 2012-10-05 | 용화콘크리트 주식회사 | Polymer cement mortar composite and manufacturing method of water retainable and permeable block using the composite |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111689726A (en) * | 2020-06-16 | 2020-09-22 | 重庆天地人建设集团有限公司 | Ultrahigh-pressure long-distance pumping concrete and preparation method thereof |
CN111978047A (en) * | 2020-09-04 | 2020-11-24 | 中国水利水电第三工程局有限公司 | High-performance pervious concrete and application thereof |
CN112125615A (en) * | 2020-10-21 | 2020-12-25 | 青岛合汇混凝土工程有限公司 | Pervious concrete and preparation method thereof |
CN112125615B (en) * | 2020-10-21 | 2022-05-13 | 青岛合汇混凝土工程有限公司 | Pervious concrete and preparation method thereof |
CN112279676A (en) * | 2020-11-06 | 2021-01-29 | 江苏恒达工程检测有限公司 | High-strength lightweight concrete for pipeline repair and preparation method thereof |
CN112897957A (en) * | 2021-03-25 | 2021-06-04 | 中交二公局第三工程有限公司 | High-pressure-resistance silica fume pervious concrete and preparation method thereof |
CN115925385A (en) * | 2023-01-14 | 2023-04-07 | 禹智环保科技(深圳)有限公司 | High-strength premixed pervious concrete and preparation method thereof |
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