CN103360000B - Pervious concrete and preparation method thereof - Google Patents
Pervious concrete and preparation method thereof Download PDFInfo
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- CN103360000B CN103360000B CN201310270500.2A CN201310270500A CN103360000B CN 103360000 B CN103360000 B CN 103360000B CN 201310270500 A CN201310270500 A CN 201310270500A CN 103360000 B CN103360000 B CN 103360000B
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Abstract
The invention relates to a pervious concrete and a preparation method thereof. The pervious concrete mainly comprises cement, aggregate, mineral admixtures, water, adhesive, and concrete additive. The pervious concrete is prepared from the components through slurry wrapping and vibration press forming, so that the pervious concrete greatly improves strength, durability and water permeability and prolongs the service life. The strength grade of the pervious concrete achieves C30, the permeation coefficient thereof is more than 2mm/s, antifreeze grade is F150, and the pervious concrete has excellent anti-blocking performance. The problem that the existing pervious concrete cannot be widely popularized due to poor self performances is solved, so that the pervious concrete can be widely used in projects such as squares, sidewalks, road isolation strips, parks and supporting roads.
Description
Technical field
The present invention relates to a kind of pervious concrete and preparation method thereof, particularly a kind of high-strength and high performance pervious concrete and preparation method thereof, belongs to concrete preparing technical field.
Background technology
In recent years, along with the quickening of urbanization and process of industrialization, high buildings and large mansions stand in great numbers, and people's open height is assembled, and ecological damage is serious, and living environment is badly in need of improving.At present, city is many to be covered by Steel Concrete, and road surface water-permeable and air permeable is poor, and rainwater cannot permeate in time, causes that city ponding is serious, underground water supply is not enough.In addition, common road concrete is shining upon in situation, and heat absorption capacity is strong, and path temperature is raise, and brings very big inconvenience to people's life.Pervious concrete is a kind of ecological environment-friendly type concrete, is the concrete with continuous hole that is ground choosing, made through special process by material, and existing certain intensity, has again certain ventilative water permeability.Pervious concrete is a kind ofly can meet pavement performance, can coordinate symbiosis with physical environment again, the paving material of the comfortable living environment of behaviour class formation, the pervious concrete with upper and lower open pore can effectively improve the heat balance on earth's surface, strengthen the circulation of the upper and lower water in earth's surface, city is increased groundwater resource, alleviates tropical island effect, improves urban climate and have great importance.
At present, about the technology of preparing of pervious concrete, also there is many defects, most of pervious concretes exist that intensity is low, poor durability, permeable weak effect, work-ing life low problem, greatly limited its scope of application.Pervious concrete, owing to having special vesicular structure, causes its lower compressive strength; And owing to corroded by objectionable impurities in water, cause aggregate surface gelling material to come off, weather resistance is poor; In addition, in use, its hole, very easily by obstructions such as dust, organic substances, cause decline its work-ing life, and there is the shortcoming taking time and effort in current high pressure washing method to pervious concrete.For the patented technology in current published pervious concrete field, prepared pervious concrete ultimate compression strength mostly is 20MPa left and right, uses it for load road concrete, low strength.In addition, for how improving the gordian techniquies such as the weather resistance of pervious concrete, permeable effect, work-ing life, not yet technology is open.
Summary of the invention
The object of the invention is to provide a kind of pervious concrete and preparation method thereof.
For achieving the above object, the first technical scheme that the present invention adopts is: a kind of pervious concrete, the ultimate compression strength of described pervious concrete be more than or equal to 30MPa, folding strength be more than or equal to 5MPa, coefficient of permeability be more than or equal to 2mm/s, freeze proof grade be F150 and more than.
Preferred technical scheme is: the composition of raw materials of described pervious concrete is mainly comprised of the material of following weight part:
Cement 15 ~ 20 weight parts;
Mineral admixture 0 ~ 2 weight part;
Aggregate 70 ~ 90 weight parts;
Water 3.5 ~ 5.0 weight parts;
Tackiness agent 0.5 ~ 2.5 weight part;
Concrete admixture 0.15 ~ 0.5 weight part;
Described cement is that strength grade is not less than 42.5 ordinary Portland cement; Described mineral admixture is at least one in silicon ash, breeze, flyash and zeolite powder; Described tackiness agent is at least one in polyvinyl alcohol, epoxy resin and polyacrylic acid; The composition of raw materials of described concrete admixture is comprised of the material of following weight part:
Poly carboxylic acid 1 ~ 1.2 weight part;
Sulfonated petro-leum 0.0008 ~ 0.0015 weight part;
Trolamine 0.8 ~ 1.2 weight part;
Sunmorl N 60S 0.0005 ~ 0.001 weight part;
Water 1 ~ 1.5 weight part.
Preferred technical scheme is: described aggregate is that particle diameter is the simple grain level rubble of 5 ~ 10mm.
Preferred technical scheme is: the specific surface area of described mineral admixture is more than or equal to 1000m
2/ kg.
For achieving the above object, the second technical scheme that the present invention adopts is: a kind of preparation method of pervious concrete: comprise the following steps:
Cement, aggregate, mineral admixture, water, tackiness agent and concrete admixture are taken respectively by described composition of raw materials;
Second step: will take material and put into whipping device, utilization is wrapped up in slurry method and stirred;
The 3rd step: molded mode is made pervious concrete by shaking.
Preferred technical scheme is: in the agent of described pervious concrete surface sprinkling surface-closed, repeat to spray once after surface drying.
Preferred technical scheme is: described surface-closed agent is waterproofing agent of organosilicon.
Preferred technical scheme is: described surface-closed agent is polymkeric substance water-resisting agent.
Related content in technique scheme is explained as follows:
1,, in such scheme, concrete frost resistance generally represents with freeze proof grade.Freeze proof grade is to adopt the test block of 28d in the length of time after water suction is saturated, bears multigelation circulation, decline and be no more than 25%, and the mass loss maximum freezing-thawing cycles that can bear while being no more than 5% is determined with ultimate compression strength.GBJ50164-92 is divided into following freeze proof grade by concrete: nine grades such as F10, F15, F25, F50, F100, F150, F200, F250, F300.
2, in such scheme, concrete crushing strength is the cube specimen with 150mm * l50mm * l50mm, and under temperature is 20 ± 3 ℃ and more than 90% condition of relative humidity, maintenance is after 28 days, with standard test methods test, and the intensity level that method of calculation obtain in accordance with regulations.
3, in such scheme, concrete flexural strength is the beam shape test specimen with 150mm * 150mm * 550mm, in normal curing condition, is issued to regulation after the length of time (28 days), and it is bad that curved under clear span 450mm, two fulcrum loading action pulls open.
4, in such scheme, coefficient of permeability is the important indicator that characterizes pervious concrete water permeability, the measuring method of the permeation coefficient of permeable concrete of " Japanese concrete association " regulation of mentioning in " permeable concrete " joint in the complete works of > > of the practical concrete of the < < writing with reference to Feng Naiqian.
5, in such scheme, described in wrap up in slurry method and first cement, mineral admixture, tackiness agent, water, admixture added according to the above ratio in stirrer and stirred 1 minute, till then adding aggregate to continue to be stirred to slurry to be wrapped in uniformly all aggregates top layer.
6, in such scheme, described in the molded method of shaking first adopt tapping equipment vibration 15 ~ 20s, then pervious concrete surface is applied to the pressure of 1 ~ 2MPa, the time is about 20 ~ 25s.
7,, in such scheme, sulfonated petro-leum is that to take oil and fraction thereof be raw material, uses sulphonating agent sulfonation, then the product made from alkali neutralization.
Because technique scheme is used, the present invention compared with prior art has following advantages and effect:
1, the surface-closed agent that the present invention adopts is liquid colourless, tasteless, harmless, pollution-free, that have infiltration film-forming properties and basic active.The construction environment temperature of spraying surface-closed agent should be higher than 25 ℃.Spray after this liquid, it can form smooth, the firm film of one deck on the surface of pervious concrete, can effectively prevent that dust, organism etc. from stopping up pervious concrete, keeps permeable unobstructed.
2, the present invention is directed to the ubiquitous low strength of current pervious concrete, poor durability, work-ing life is short, permeable weak effects etc. have a kind of high-strength and high performance pervious concrete that the problem of considerable influence proposes and preparation method thereof to pervious concrete performance, it is simple that this pervious concrete has construction, high-strength, permeable effective, the feature that long service life and endurance quality are excellent, the method is when guaranteeing pervious concrete service requirements, can make more than pervious concrete ultimate compression strength reaches 30MPa, freeze proof grade reaches F150, and there is excellent anti-clogging plug effect, solved the difficult problem that current pervious concrete is difficult to promote because self performance is poor on a large scale, can be widely used in square, walkway, road separator, the engineerings such as parking lot and load road.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment mono-: a kind of pervious concrete and preparation method thereof
(1) by following proportioning, take each starting material of high-strength and high performance pervious concrete: P.O42.5 cement 3.7kg, silicon ash 0.3kg, 5 ~ 10mm aggregate 16kg, polyvinyl alcohol rubber powder 0.2kg, concrete admixture 40g, water 700g.The proportioning of the composition of raw materials of described concrete admixture is as follows:
1 kilogram of poly carboxylic acid;
0.0008 kilogram of sulfonated petro-leum;
0.8 kilogram of trolamine;
0.0005 kilogram of Sunmorl N 60S;
1 kilogram, water.
(2) after being added to stirrer, the cement having weighed, silicon ash, polyvinyl alcohol rubber powder, concrete admixture and water stirs 1 minute; Add aggregate, till continuing to be stirred to slurry and being wrapped in uniformly all aggregates top layer and occurring bright look.
(3) pack the pervious concrete stirring into die trial, on plain bumper, shake 15s, simultaneously the pressure that applies 1 ~ 2MPa to its surface uniform.Then by the laggard column criterion maintenance of its surface coating.
After (4) 2 days, take out pervious concrete, to its surface sprinkling surface-closed agent, after surface drying, repeat to spray once, place continuation mark after 1 hour and support to stipulating the length of time.By relevant criterion, carry out the mensuration of indices.
Each performance index of high-strength and high performance pervious concrete
| Test index | Coefficient of permeability/mm/s | Freeze-thaw-cycle index/time | 28 days folding strength/MPa | 28 days ultimate compression strength/MPa |
| Test result | 2 | 173 | 32.5 | 5.2 |
Embodiment bis-: a kind of pervious concrete and preparation method thereof
(1) by following proportioning, take each starting material of high-strength and high performance pervious concrete: P.O42.5 cement 3.6kg, silicon ash 0.4kg, 5 ~ 10mm aggregate 16kg, polyvinyl alcohol rubber powder 0.25kg, composite efficient admixture 60g, water 600g.The proportioning of the composition of raw materials of described concrete admixture is as follows:
1.2 kilograms of poly carboxylic acid;
0.0008 kilogram of sulfonated petro-leum;
1.2 kilograms of trolamines;
0.0005 kilogram of Sunmorl N 60S;
1 kilogram, water.
(2) after being added to stirrer, the cement having weighed, silicon ash, polyvinyl alcohol rubber powder, admixture and water stirs 1 minute; Add aggregate, till continuing to be stirred to slurry and being wrapped in uniformly all aggregates top layer and occurring bright look.
(3) pack the pervious concrete stirring into die trial, on plain bumper, shake 15s, simultaneously the pressure that applies 1 ~ 2MPa to its surface uniform.Then by the laggard column criterion maintenance of its surface coating.
After (4) 2 days, take out pervious concrete, to its surface sprinkling surface-closed agent, after surface drying, repeat to spray once, place continuation mark after 1 hour and support to stipulating the length of time.By relevant criterion, carry out the mensuration of indices.
Each performance index of high-strength and high performance pervious concrete:
| Test index | Coefficient of permeability/mm/s | Freeze-thaw-cycle index/time | 28 days folding strength/MPa | 28 days ultimate compression strength/MPa |
| Test result | 2.13 | 198 | 35.6 | 6.0 |
Embodiment tri-~ five: a kind of pervious concrete and preparation method thereof
The composition of raw materials of described pervious concrete is as following table:
| Embodiment tri- | Embodiment tetra- | Embodiment five | |
| Cement | 18 | 16 | 20 |
| Mineral admixture | 0 | 1 | 2 |
| Aggregate | 71 | 80 | 90 |
| Water | 3.5 | 4 | 5 |
| Tackiness agent | 1 | 2.5 | 0.5 |
| Concrete admixture | 0.2 | 0.5 | 0.4 |
Note: the unit in the material of upper table is kilogram.
Cement: embodiment tri-, 42.5R ordinary Portland cement; Embodiment tetra-, 52.5 ordinary Portland cements; Embodiment five, 52.5R ordinary Portland cement.
Mineral admixture: embodiment tri-, flyash, specific surface area is 1000m
2/ kg; Embodiment tetra-, zeolite powder, specific surface area is 1050m
2/ kg; Embodiment five, silicon ash and zeolite powder are obtained by mixing according to the mass ratio of 1:1, and specific surface area is 1100m
2/ kg.
4, pervious concrete according to claim 1, is characterized in that: described mineral admixture.
The simple grain level rubble that aggregate: embodiment tri-, particle diameter are 5 ~ 10mm; The rubble that embodiment tetra-, particle diameter are 12 ~ 15mm.
Tackiness agent: embodiment tri-, epoxy resin; Embodiment tetra-, polyacrylic acid; Embodiment five, epoxy resin and polyvinyl alcohol are obtained by mixing according to the mass ratio of 1:1.
The composition of raw materials of concrete admixture is as following table:
| Embodiment tri- | Embodiment tetra- | Embodiment five | |
| Poly carboxylic acid | 1 | 1.1 | 1.2 |
| Sulfonated petro-leum | 0.0009 | 0.0012 | 0.0015 |
| Trolamine | 1.2 | 1 | 0.8 |
| Sunmorl N 60S | 0.0008 | 0.001 | 0.0005 |
| Water | 1 | 1.5 | 1.3 |
Preparation method: comprise the following steps:
Cement, aggregate, mineral admixture, water, tackiness agent and concrete admixture are taken respectively by described composition of raw materials;
Second step: will take material and put into whipping device, utilization is wrapped up in slurry method and stirred;
The 3rd step: molded mode is made pervious concrete by shaking.
In the agent of described pervious concrete surface sprinkling surface-closed, after surface drying, repeat to spray once.
Surface-closed agent in embodiment mono-and embodiment bis-is waterproofing agent of organosilicon.
Surface-closed agent in embodiment tri-~ embodiment five is polymkeric substance water-resisting agent
Each performance index of high-strength and high performance pervious concrete:
| Test index | Coefficient of permeability/mm/s | Freeze-thaw-cycle index/time | 28 days folding strength/MPa | 28 days ultimate compression strength/MPa |
| Embodiment tri- | 2.2 | 175 | 36 | 6.0 |
| Embodiment tetra- | 2.3 | 180 | 33 | 5.5 |
| Embodiment five | 2.15 | 195 | 37 | 6.2 |
Above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that spirit is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
A kind of pervious concrete and preparation method thereof, its component mainly comprises cement, aggregate, mineral admixture, water, tackiness agent, concrete admixture, the present invention utilize this component and by wrapping up in slurry method, the molded pervious concrete of being processed into that shakes, intensity, endurance quality, water permeability and the work-ing life of significantly having improved pervious concrete.The strength grade of this pervious concrete reaches C30, and coefficient of permeability is greater than 2mm/s, and freeze-thaw-grade is F150, and has excellent anti-blockage function.Solve the difficult problem that current pervious concrete is difficult to promote because self performance is poor on a large scale, can be widely used in the engineerings such as square, walkway, road separator, parking lot and load road.
Claims (7)
1. a pervious concrete, is characterized in that: the ultimate compression strength of described pervious concrete be more than or equal to 30MPa, folding strength be more than or equal to 5MPa, coefficient of permeability be more than or equal to 2mm/s, freeze proof grade be F150 and more than; The composition of raw materials of described pervious concrete is mainly comprised of the material of following weight part:
Cement 15 ~ 20 weight parts;
Mineral admixture 0 ~ 2 weight part;
Aggregate 70 ~ 90 weight parts;
Water 3.5 ~ 5.0 weight parts;
Tackiness agent 0.5 ~ 2.5 weight part;
Concrete admixture 0.15 ~ 0.5 weight part;
Described cement is that strength grade is not less than 42.5 ordinary Portland cement; Described mineral admixture is at least one in silicon ash, breeze, flyash and zeolite powder; Described tackiness agent is at least one in polyvinyl alcohol, epoxy resin and polyacrylic acid; The composition of raw materials of described concrete admixture is comprised of the material of following weight part:
Poly carboxylic acid 1 ~ 1.2 weight part;
Sulfonated petro-leum 0.0008 ~ 0.0015 weight part;
Trolamine 0.8 ~ 1.2 weight part;
Sunmorl N 60S 0.0005 ~ 0.001 weight part;
Water 1 ~ 1.5 weight part.
2. pervious concrete according to claim 1, is characterized in that: described aggregate is that particle diameter is the simple grain level rubble of 5 ~ 10mm.
3. pervious concrete according to claim 1, is characterized in that: the specific surface area of described mineral admixture is more than or equal to 1000m
2/ kg.
4. a method of preparing the pervious concrete described in the arbitrary claim of claim 1 ~ 3: it is characterized in that: comprise the following steps:
Cement, aggregate, mineral admixture, water, tackiness agent and concrete admixture are taken respectively by described composition of raw materials;
Second step: will take material and put into whipping device, utilization is wrapped up in slurry method and stirred;
The 3rd step: molded mode is made pervious concrete by shaking.
5. method according to claim 4, is characterized in that: in the agent of described pervious concrete surface sprinkling surface-closed, repeat to spray once after surface drying.
6. method according to claim 5, is characterized in that: described surface-closed agent is waterproofing agent of organosilicon.
7. method according to claim 5, is characterized in that: described surface-closed agent is polymkeric substance water-resisting agent.
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