CN1749201A - Flyash water permeating road surface concrete - Google Patents
Flyash water permeating road surface concrete Download PDFInfo
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- CN1749201A CN1749201A CNA2005100284682A CN200510028468A CN1749201A CN 1749201 A CN1749201 A CN 1749201A CN A2005100284682 A CNA2005100284682 A CN A2005100284682A CN 200510028468 A CN200510028468 A CN 200510028468A CN 1749201 A CN1749201 A CN 1749201A
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- Prior art keywords
- water
- flyash
- road surface
- surface concrete
- concrete
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The water permeating road surface concrete with flyash for road engineering consists of cement 13.0-15.0wt%, flyash 2.0-4.0 wt%, water 4.0-5.0wt%, coarse aggregate 76.0-79.0wt% and efficient water reducing agent 0.5-1.0 wt%. The present invention has the following advantages: wide material source, simple technological process, easy operation, capacity of making concrete road surface with high strength, high water permeation and air permeation, high volume stability, no shrinkage, high wear resistance, low cost and environment friendship.
Description
Technical field
What the present invention relates to is a kind of concrete that is used for building materials technology field, specifically, relates to the permeable environmental protection pavement concrete of a kind of flyash.
Background technology
Along with the quickening of expanding economy and urban construction paces, the face of land of modern city is progressively covered by material water-proof materials such as buildings and concrete, forms morphologic " artificial desert ".The road fraction of coverage in China city has reached 7～15% at present.The relevant expert thinks, owing to the fluid-tight reason of ground surface materials such as concrete and pitch, nature water can not be permeated the ground, and causes ground flora to be difficult to normal growth; Air-locked road surface is difficult to carry out the exchange of heat, moisture with air, lacks the regulating power to urban surface temperature, humidity, produces so-called " tropical island effect ".The easy ponding of fluid-tight in addition road surface has reduced the comfortableness and the security of road.When concentrating rainfall in the short period of time, rainwater can only enter the river by the underground water facility, can not be rationally, effectively utilize natural precipitation and replenish urban groundwater resource, cause water resource waste.At the problems referred to above, the eighties in 20th century, developed countries such as the U.S., the Japan water-permeable pavement paver that begins one's study, and be applied to park, walkway, lightweight track, parking lot and various sports field.In recent years, domestic some areas were also done similarly according to foreign experience and were attempted, and had obtained certain effect.
Find through literature search prior art, Chinese patent publication number: CN1609349A, patent name: permeable slag concrete slope protection and preparation method thereof, this patent readme is: " mainly be made up of concrete coarse aggregate and gelling material, it is characterized in that: described concrete coarse aggregate is slag and/or cinder; Described gelling material is mainly mixed by cement, slag powders ash and high efficiency water reducing agent." this patent mainly is to have carried out some adjustment to gathering materials aspect raw material selection, as adopting slag instead of part coarse aggregate or without methods such as fine aggregates.Its internal void skewness of the concrete of Zhi Zuoing like this causes resistance to compression, folding strength lower, generally about 10MPa, is difficult to be used in road engineering and promote.Therefore the porous pavement that is used for some road engineerings mainly is some bituminous materials, and this has all improved on cost and manufacture craft greatly, is unfavorable for large-area application and popularization.
Summary of the invention
The objective of the invention is to provides a kind of flyash water permeating road surface concrete at the deficiencies in the prior art and defective.Make it have good permeable, ventilation property, be used for the environmental protection concrete on road engineering and path road surface, gardens.
The present invention is achieved by the following technical solutions, and the present invention system is stirred cast and forms by necessarily mixing and stirring operation by ordinary Portland cement, flyash, rubble and high efficiency water reducing agent.Each components by weight is:
13.0～15.0 parts of weights of ordinary Portland cement
2.0～4.0 parts of weights of flyash
4.0～5.0 parts of weights of water
76.0～79.0 parts of weights of coarse aggregate
0.5～1.0 part of weight of high efficiency water reducing agent
The present invention utilizes commercially available common building material to realize the permeable, ventilative of water penetrative road concrete and have necessarily resisting fundamental propertys such as folding, ultimate compression strength:
1. adopt flyash partly to replace silicate cement, utilize flyash to improve the flowing property of mix.Can greatly reduce cost like this, and reduce environmental pollution, effectively utilize refuse.Cement should be selected the silicate cement of 525. strength grades for use, and flyash should be selected II level flyash for use.
2. on cement consumption is selected, under the prerequisite that guarantees best water consumption, suitably increase cement consumption, guarantee the denseness of aggregate ambient water mud rete and thickness, avoid the grout consumption excessive and influence concrete water-permeable and ventilation property simultaneously to improve concrete strength.
3. coarse aggregate employing particle diameter is the machine-processed rubble of 16～20mm gap grading, and the aggregate usefulness of every cubic meter of concrete is measured the numerical value of the tightly packed density of machine-processed rubble, is in contact with one another the intensity skeleton of accumulation structure pervious concrete with the machine-processed rubble of gap grading.
4. on water cement ratio was selected, can evenly wrap up the machine-processed rubble of selected 16～20mm gap grading and have adequate liquidity with grout was the best, is specially 0.25～0.30.
5. for making pervious concrete can realize good operation at cement consumption under not quite, need mix an amount of high efficiency water reducing agent, admixture naphthalenesulfonate series high-efficiency water-reducing agent powder among the present invention, addition content are 0.50～1.2% of gelling material (cement and flyash).
Preparation method of the present invention is: will prewet with 25% left and right sides water by the machine-processed rubble of proportioning design requirements earlier and stir 1 minute, the silicate cement of adding design requirements weight and flyash and machine-processed rubble stirred 2 minutes, added 40% water then and stirred about 45 seconds; Add the water reducer of remainder water and design requirements weight at last, stir into concrete mixture, its churning time is 2～3 minutes, then casting.
The present invention has following feature performance benefit: the starting material wide material sources, and technology is simple, and is easy to operate, can produce that intensity is higher to have a concrete that high water-permeability and ventilation property are used for different road surfaces; The concrete of being prepared has higher volume stability, does not have and shrinks, and is wear-resisting; Low price has the value of environmental protection.
Embodiment
Provide following examples in conjunction with content of the present invention:
Flyash water permeating road surface concrete, by ordinary Portland cement, flyash and the particle diameter of 52.5 strength grades is that the machine-processed rubble of 16～20mm gap grading is by suitable proportion, finish with following processing method: will prewet with 25% left and right sides water by the machine-processed rubble of proportioning design requirements earlier and stir 1 minute, the silicate cement of adding design requirements weight and flyash and machine-processed rubble stirred 2 minutes, added 40% water then and stirred about 45 seconds; Add the water reducer of remainder water and design requirements weight at last, stir into concrete mixture, its churning time is 2～3 minutes.The concrete mixture that the stirs prefabricated mould of packing into is carried out cast-in-place shaping.The curing in the mold cycle is 1～2 day, takes off that to touch curing cycle be 14～28 days.
Each components by weight of flyash water permeating road surface concrete (the unit volume cement consumption is 280kg among the embodiment)
| Sample | Cement | Flyash | The mechanism rubble | Water | Water reducer |
| S1 | 13.0 | 3.0 | 79.0 | 4.5 | 0.5 |
| S2 | 15.0 | 2.0 | 77.5 | 5.0 | 0.5 |
| S3 | 14.0 | 4.0 | 76.0 | 5.0 | 1.0 |
| S4 | 14.0 | 3.0 | 78.25 | 4.0 | 0.75 |
Above-mentioned four concrete mixs of executing example, stirring by stirring technique provided by the invention, inject the mould of 150mm * 150mm * 150mm, is maintenance taking-up after 24 hours under 90% the condition, the demoulding, normal curing 28 days at 20 °, humidity, record its performance, as following table:
| Sample | S1 | S2 | S3 | S4 |
| Coefficient of permeability (mm/s) | 3.2 | 2.9 | 2.1 | 2.4 |
| Ultimate compression strength (MPa) | 28.0 | 25.0 | 32.5 | 26.5 |
Claims (6)
1, a kind of flyash water permeating road surface concrete is characterized in that, is made up of cement, flyash, rubble, water reducer and water, and each weight percentages of components is:
Ordinary Portland cement 13.0～15.0
Flyash 2.0～4.0
Water 4.0～5.0
Coarse aggregate 76.0～79.0
High efficiency water reducing agent 0.5～1.0.
2, flyash water permeating road surface concrete according to claim 1 is characterized in that, described cement is 52.5 strength grade ordinary Portland cements.
3, flyash water permeating road surface concrete according to claim 1 is characterized in that, described flyash is II level fine-ground fly-ash.
4, flyash water permeating road surface concrete according to claim 1 is characterized in that, described coarse aggregate is the machine-processed rubble of 16～20mm gap grading for particle diameter.
5, flyash water permeating road surface concrete according to claim 1 is characterized in that, described water and flyash, and both ratios are 0.25～0.30.
6, flyash water permeating road surface concrete according to claim 1 is characterized in that, described high efficiency water reducing agent is admixture naphthalenesulfonate series high-efficiency water-reducing agent powder, and addition content is 0.50～1.2% of a gelling material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100284682A CN1749201A (en) | 2005-08-04 | 2005-08-04 | Flyash water permeating road surface concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100284682A CN1749201A (en) | 2005-08-04 | 2005-08-04 | Flyash water permeating road surface concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1749201A true CN1749201A (en) | 2006-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100284682A Pending CN1749201A (en) | 2005-08-04 | 2005-08-04 | Flyash water permeating road surface concrete |
Country Status (1)
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| CN (1) | CN1749201A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101372412A (en) * | 2008-08-08 | 2009-02-25 | 高怀东 | Cement concrete |
| CN101948287A (en) * | 2010-10-15 | 2011-01-19 | 上海市建筑科学研究院(集团)有限公司 | Dry method desulfurized fly ash stabilized gravel |
| CN105603849A (en) * | 2015-12-18 | 2016-05-25 | 南通科达建材股份有限公司 | Pervious concrete precast component for road |
| CN105801165A (en) * | 2016-02-29 | 2016-07-27 | 南京航空航天大学 | Mixed foamed sludge light-weight permeable composition used for roadbed filling and preparation method thereof |
| CN108484031A (en) * | 2018-03-29 | 2018-09-04 | 西京学院 | A kind of cracking resistance pervious concrete and preparation method thereof |
| CN108914734A (en) * | 2018-07-11 | 2018-11-30 | 武汉大学 | High tensile pervious concrete sandwich structure and preparation method |
| CN110482921A (en) * | 2019-09-10 | 2019-11-22 | 中国水利水电第三工程局有限公司 | Pervious concrete |
-
2005
- 2005-08-04 CN CNA2005100284682A patent/CN1749201A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101372412A (en) * | 2008-08-08 | 2009-02-25 | 高怀东 | Cement concrete |
| CN101948287A (en) * | 2010-10-15 | 2011-01-19 | 上海市建筑科学研究院(集团)有限公司 | Dry method desulfurized fly ash stabilized gravel |
| CN101948287B (en) * | 2010-10-15 | 2013-01-23 | 上海市建筑科学研究院(集团)有限公司 | Dry method desulfurized fly ash stabilized gravel |
| CN105603849A (en) * | 2015-12-18 | 2016-05-25 | 南通科达建材股份有限公司 | Pervious concrete precast component for road |
| CN105801165A (en) * | 2016-02-29 | 2016-07-27 | 南京航空航天大学 | Mixed foamed sludge light-weight permeable composition used for roadbed filling and preparation method thereof |
| CN108484031A (en) * | 2018-03-29 | 2018-09-04 | 西京学院 | A kind of cracking resistance pervious concrete and preparation method thereof |
| CN108914734A (en) * | 2018-07-11 | 2018-11-30 | 武汉大学 | High tensile pervious concrete sandwich structure and preparation method |
| CN110482921A (en) * | 2019-09-10 | 2019-11-22 | 中国水利水电第三工程局有限公司 | Pervious concrete |
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