CN1390798A - Process for preparing regenerated sand for building - Google Patents
Process for preparing regenerated sand for building Download PDFInfo
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- CN1390798A CN1390798A CN02132605A CN02132605A CN1390798A CN 1390798 A CN1390798 A CN 1390798A CN 02132605 A CN02132605 A CN 02132605A CN 02132605 A CN02132605 A CN 02132605A CN 1390798 A CN1390798 A CN 1390798A
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- sand
- concrete
- reclaimed sand
- building
- mortar
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A process for preparing regenerated sand from the building garbage includes such steps as mechanical crushing, mechanical pulverizing, and adding reinforcing agent. Said regenerated sand can be used to prepare concrete or mortar. Its advantages are low cost and use of waste to reduce environmental pollution.
Description
Technical field the present invention relates to a kind of regenerated material of construction, is for solving tearing the environmental pollution that the waste of discharging when taking off buildings causes open, utilizing these building wastes to produce the processing method of preparing regenerated sand for building.
It is the waste of construction industry quantity discharged maximum that background technology is torn the discarded concrete of discharging when taking off buildings open, introducing the annual waste of discharging of EU member country at the beginning of the nineties according to data is that 5,000 ten thousand tons, the U.S. are that 6,000 ten thousand tons, Japan are 1,200 ten thousand tons, and other country also faces analogue.And the quantity discharged of discarded concrete is all increasing every year, and the quantity discharged of estimating now discarded concrete is 3 times of the beginning of the nineties.So a large amount of concrete buildingss will be removed after reaching work-ing life, a large amount of discarded concrete after the dismounting can cause great environmental problem, not only take a large amount of soils as discharging, and wasting manpower and material resources's maintenance of discharging again, second environmental pollution also caused.At present, follow the fast development of economic construction, in the construction industry sandstone aggregate of concrete consumption maximum be not use not to the utmost, inexhaustible.Domestic now to have existed minority area to occur exhausted, and shortage appears in most of area, and is in rather short supply, and the excessive collection of placer that picks up of cutting into a mountain for quarrying can work the mischief the havoc eubiosis and natural landscape again to environment.The discarded concrete breaking of research is produced imperative, the profit is in the future thousands of years of preparing regenerated sand for building; promptly solved the natural fine nervous problem of resource of gathering materials; be beneficial to again and gather materials the home environment protection and reduce the stacking occupation of land and the problem of environmental pollution of urban waste; realize closed circuitization of material cycle that concrete is produced, guarantee the permanent Sustainable development of construction industry.Chinese invention patent 98124978.7 dead meals are used to produce light concrete construction material, 89105662.9 and utilize the method for garbage to produce building material, the method for 00101355.6 garbage to produce building material, etc. the patented technology description is to utilize depleted disposable plastic goods, as: domestic refuses such as plastics cutlery box, instant noodle bowl, various food-packaging bag, fruit net, portable shopping bag, plastic cup refuse bag, the interior filling foamed plastics liner of household electrical appliances packing box, the method that is used to produce material of construction.01103309.6 be to disclose a kind of use to make the material of construction method from the mud of waste water, be to make material of construction by stable mud from fluoric-containing acid waste water, comprise artificial gravel, coloured Ceramic Balls and terazotiles.
Summary of the invention the objective of the invention is to replace as regenerated aggregate with building waste the processing method of the production preparing regenerated sand for building of river sand preparation concrete and masonry mortar.
The processing method content Description of preparing regenerated sand for building of the present invention:
The processing method of preparing regenerated sand for building of the present invention is characterized in that: make the processing method of preparing regenerated sand for building, comprise the following steps:
(1), tear buildings open after taking off building waste, become the building waste of the rubble state of 100mm * 100mm by mechanical disintegration;
(2), the building waste with the rubble state is the reclaimed sand of fine sand state once more by mechanical disintegration; The technical indicator of reclaimed sand: tap density 1180kg/m
3, silt content 5.0%, clod content 1.5%, water-intake rate (natural water-bearing) 7%, soundness Na
2So
4Saturated solution soak soundness qualified, always contain brick amount 0.18%, that organic content % is shallower than reference colour is qualified;
(3), utilize reclaimed sand preparation concrete and mortar, for improving the performance of concrete and mortar, reduce bleeding, increase flowability, the workability of mixed material, need the admixture toughener, the concrete mixture performance is reached: strength grade: C20, water cement ratio: 0.58～0.59, toughener volume %:0～1, slump cm:5.0, unit weight kg/m
3: 2245～2250, bleeding rate %:3.2～3.7, presetting period h:min7:50～8:30, final setting time h:min11:45～12:50, sand coarse aggregate ratio %:35～36;
(4), toughener by: 1 part of three ethanol peace, 2 parts of ferric oxide, 7 parts of flyash are formed.
The processing method of preparing regenerated sand for building of the present invention; solved and torn the environmental pollution that the waste of discharging when taking off buildings causes open; promptly solved the natural fine nervous problem of resource of gathering materials; be beneficial to again and gather materials the home environment protection and reduce the stacking occupation of land and the problem of environmental pollution of urban waste; realize closed circuitization of material cycle that concrete is produced, guarantee the permanent Sustainable development of construction industry.Later strength, weather resistance, frost resistance, carbonation properties, shrinkage and the anti-permeability performance of the ultimate compression strength of the masonry mortar of proof employing reclaimed sand preparation, concrete, mechanical property, concrete have have all met or exceeded standard by experiment.Utilize the waste of industry, the architecture engineering material that makes China is to green, energy-saving and environmental protection type development.The concrete and the more every m of ordinary concrete of reclaimed sand preparation
3Cost reduces about 15～20 yuan, and economic benefit is obvious, and the saving social benefit that resource produced is huge.The concrete density of reclaimed sand preparation and slurry density are all than the little 100～180kg/m of density of common concrete and mortar
3Can alleviate structural weight per square meter; Concrete and mortar anti-freezing property with the reclaimed sand preparation are better than common concrete and mortar, and this material is particularly suitable for the Northeast; Add the workability and the ultimate compression strength that can improve product behind an amount of toughener with the concrete of reclaimed sand preparation and mortar; The concrete of reclaimed sand preparation is identical with the ordinary concrete ordinary mortar with construction technology with the stirring of mortar, need not increase any equipment, and its aboundresources can be gathered materials on the spot, turns waste into wealth, be benefited the nation and the people.
Embodiment
Embodiment one
The processing method of manufacturing preparing regenerated sand for building provided by the invention, the technological line of taking in the test, utilize the concrete and the mortar of preparing regenerated sand for building preparation, the proportioning design is according to JGJ55-2000 ordinary concrete design specifications, JGJ98-2000 masonry mortar design specifications design preparation C15-C25 strength grade concrete; The M2.5-M10 building mortar.For improving the performance of concrete and mortar, reduce bleeding, increase flowability, the workability of mixed material, the an amount of toughener of admixture in test, and take the selection of different tougheners and the grating of different reclaimed sand, by to 40 groups of concrete proportioning tests, 40 groups of mortar proportioning tests, and concrete and the every physical and mechanical property test of mortar, and found out the optimum technology parameter of C15-C25 concrete, M2.5-M10 mortar, satisfied the technical performance index requirement that concrete pouring, mortar are built by laying bricks or stones.
The concrete compressive strength simultaneous test
| Material | Strength grade | Water cement ratio | Toughener volume % | Slump cm | Aggregate size mm | Ultimate compression strength Mpa | |
| 7 days | 28 days | ||||||
| River sand-1 | ????C15 | ??0.70 | ????0 | ??5.0 | ??5～20 | ??7.6 | ????16.2 |
| Reclaimed sand-1 | ????C15 | ??0.70 | ????0 | ??5.0 | ??5～20 | ??7.3 | ????14.5 |
| Reclaimed sand-12 | ????C15 | ??0.70 | ????1 | ??5.0 | ??5～20 | ??7.8 | ????17.6 |
| Reclaimed sand-13 | ????C15 | ??0.70 | ????1 | ??5.0 | ??5～20 | ??8.0 | ????18.5 |
| Reclaimed sand-14 | ????C15 | ??0.65 | ????1 | ??4.5 | ??5～20 | ??8.2 | ????19.8 |
| River sand-2 | ????C20 | ??0.56 | ????0 | ??5.0 | ??5～20 | ??10.5 | ????23.6 |
| Reclaimed sand-2 | ????C20 | ??0.59 | ????0 | ??4.5 | ??5～20 | ??10.0 | ????20.3 |
| Reclaimed sand-25 | ????C20 | ??0.56 | ????1 | ??5.0 | ??5～20 | ??11.6 | ????24.5 |
| Reclaimed sand-26 | ????C20 | ??0.59 | ????1 | ??5.0 | ??5～20 | ??12.1 | ????25.8 |
| Reclaimed sand-27 | ????C20 | ??0.56 | ????1 | ??5.0 | ??5～20 | ??13.0 | ????26.2 |
| River sand-3 | ????C25 | ??0.51 | ????0 | ??4.5 | ??5～20 | ??12.8 | ????26.0 |
| Reclaimed sand-3 | ????C25 | ??0.50 | ????0 | ??4.0 | ??5～20 | ??11.6 | ????23.5 |
| Reclaimed sand-28 | ????C25 | ??0.50 | ????1 | ??4.5 | ??5～20 | ??12.9 | ????27.2 |
| Reclaimed sand-29 | ????C25 | ??0.51 | ????1 | ??4.5 | ??5～20 | ??13.5 | ????29.0 |
| Reclaimed sand-30 | ????C25 | ??0.48 | ????1 | ??4.5 | ??5～20 | ??14.9 | ????30.6 |
| Reclaimed sand-31 | ????C25 | ??0.47 | ????2 | ??4.5 | ??5～20 | ??15.8 | ????31.9 |
| Reclaimed sand-32 | ????C25 | ??0.46 | ????3 | ??4.5 | ??5～20 | ??14.6 | ????29.5 |
Above-mentioned test shows with the concrete of reclaimed sand preparation selects identical strength grade to compare test with ordinary concrete, the concrete compressive strength of reclaimed sand preparation all is lower than the ultimate compression strength of ordinary concrete, after mixing toughener with the concrete of reclaimed sand preparation, ultimate compression strength obviously improves, and obviously change is big for intensity along with water cement ratio diminishes.
The concrete toughener volume of evidence reclaimed sand preparation is controlled at about 1%, water cement ratio is controlled at 0.40～0.70%, all can satisfy the concrete cohesiveness of reclaimed sand preparation, slump, time of coagulation etc. the strength grade of design like this, can not be with the concrete toughener volume of reclaimed sand preparation above 2%.
Mortar ultimate compression strength simultaneous test
| Ultimate compression strength | Material | Denseness mm | Capacity kg/m3 | Ultimate compression strength Mpa 7 days | Ultimate compression strength Mpa 28 days |
| ????M2.5 | River sand-18 | ?75 | ????2260 | ????1.61 | ????4.7 |
| ????M2.5 | Reclaimed sand-18 | ?75 | ????1982 | ????1.5 | ????5.1 |
| ????M2.5 | Reclaimed sand-19 | ?70 | ????1981 | ????1.3 | ????4.6 |
| ????M2.5 | Reclaimed sand-20 | ?65 | ????1982 | ????2.2 | ????6.4 |
| ????M5.0 | River sand-21 | ?70 | ????2262 | ????2.75 | ????5.9 |
| ????M5.0 | Reclaimed sand-21 | ?75 | ????1980 | ????2.3 | ????5.5 |
| ????M5.0 | Reclaimed sand-22 | ?65 | ????1981 | ????2.12 | ????5.1 |
| ????M5.0 | Reclaimed sand-23 | ?70 | ????1980 | ????2.9 | ????6.1 |
| ????M7.5 | River sand-214 | ?75 | ????2260 | ????2.8 | ????7.6 |
| ????M7.5 | Reclaimed sand-24 | ?73 | ????1982 | ????2.6 | ????7.5 |
| ????M7.5 | Reclaimed sand-25 | ?75 | ????1980 | ????2.4 | ????7.4 |
| ????M7.5 | Reclaimed sand-26 | ?75 | ????1983 | ????2.6 | ????9.6 |
| ????M10 | River sand-272 | ?75 | ????2260 | ????6.2 | ????11.3 |
| ????M10 | Reclaimed sand-27 | ?60 | ????1981 | ????6.1 | ????10.5 |
| ????M10 | Reclaimed sand-28 | ?70 | ????1980 | ????5.8 | ????10.3 |
| ????M10 | Reclaimed sand-29 | ?65 | ????1984 | ????6.3 | ????11.6 |
Show that from test-results the mortar ultimate compression strength of ordinary mortar and regeneration preparation all reaches the strength grade of design.Optimum mix should be selected basic proportioning or increase the proportioning of 10% cement.
Embodiment two
Concrete and masonry mortar mechanical property test with the reclaimed sand preparation
| Numbering | Strength grade | Slump | Water | Cement | Sand | Stone 5-20 mm | Toughener % | Density kg/m 3 | 28 days ultimate compression strength MPa | Tensile splitting strength MPa | Axial compressive strength MPa | Young's modulus MPa |
| River sand-1 | ?C15 | ?3-5 | ?195 | ?280 | ?770 | ?1155 | ???0 | ?2400 | ?20.6 | ?2.8 | ?17.8 | 2.5× 10 4 |
| Reclaimed sand-13 | ?C15 | ?3-5 | ?195 | ?280 | ?770 | ?1155 | ?1.7 | ?2320 | ?21.8 | ?3.0 | ?18.3 | 2.4× 10 4 |
| River sand-2 | ?C20 | ?3-5 | ?195 | ?350 | ?680 | ?1175 | ???0 | ?2390 | ?25.8 | ?3.5 | ?22.0 | 2.6× 10 4 |
| Reclaimed sand-25 | ?C20 | ?3-5 | ?195 | ?350 | ?680 | ?1175 | ?1.0 | ?2330 | ?26.5 | ?3.4 | ?23.2 | 2.8× 10 4 |
| River sand-3 | ?C25 | ?3-5 | ?195 | ?380 | ?655 | ?1170 | ???0 | ?2405 | ?28.5 | ?3.6 | ?23.8 | 3.1× 10 4 |
| Reclaimed sand-29 | ?C25 | ?3-5 | ?195 | ?380 | ?655 | ?1170 | ?1.0 | ?2320 | ?29.8 | ?3.9 | ?25.2 | 3.0× 10 4 |
With reclaimed sand preparation mortar mechanical property test
| Numbering | Strength grade | Denseness mm | Cement | Reclaimed sand | Density kg/m3 | Ultimate compression strength MPa |
| River sand-18 | ????M2.5 | ????75 | ????200 | ?1500 | ?2260 | ????4.6 |
| Reclaimed sand-20 | ????M2.5 | ????70 | ????200 | ?1200 | ?1985 | ????5.1 |
| River sand-21 | ????M5.0 | ????75 | ????220 | ?1500 | ?2265 | ????5.9 |
| Reclaimed sand-23 | ????M5.0 | ????73 | ????230 | ?1200 | ?1980 | ????6.1 |
| River sand-24 | ????M7.5 | ????75 | ????240 | ?1500 | ?2258 | ????7.6 |
| Reclaimed sand-26 | ????M7.5 | ????70 | ????265 | ?1200 | ?1983 | ????9.5 |
| River sand-27 | ????M10 | ????65 | ????260 | ?1500 | ?2265 | ????11.3 |
| Reclaimed sand-29 | ????M10 | ????75 | ????280 | ?1200 | ?1980 | ????11.6 |
Embodiment three
The concrete of reclaimed sand preparation and mortar and ordinary concrete and mortar are all made 100 * 100mm, 70 * 70mm test specimen, after 28 days marks are supported, test by concrete and the freeze proof method of mortar, at-20～-25 ℃---freeze under+20 ℃ of temperature and melted in 4 hours 4 hours.
Concrete frost resistance comparison test
| Numbering | Freeze-thaw cycle temperature ℃ | Freezing-thawing cycles | Intensity MPa after the freeze thawing | Comparison intensity MPa | Loss of strength rate % | Rate of weight loss % |
| River sand 1 C15 | -20～25℃～+20℃ | ????25 | ????21.3 | ????21.5 | ??-1.9 | ????0 |
| Reclaimed sand-13 C15 | -20～25℃～+20℃ | ????25 | ????20.9 | ????21.2 | ??-1.4 | ????0 |
| River sand 2 C20 | -20～25℃～+20℃ | ????25 | ????23.6 | ????24.1 | ??-2.1 | ????0 |
| Reclaimed sand-25 C20 | -20～25℃～+20℃ | ????25 | ????24.8 | ????25.2 | ??-1.6 | ????0 |
| River sand 3 C25 | -20～25℃～+20℃ | ????25 | ????29.1 | ????29.6 | ??-1.7 | ????0 |
| Reclaimed sand-29 C25 | -20～25℃～+20℃ | ????25 | ????28.7 | ????29.3 | ??-1.2 | ????0 |
Ordinary mortar frost resistance comparison test
| Numbering | Freeze-thaw cycle temperature ℃ | Freezing-thawing cycles | Intensity MPa after the freeze thawing | Comparison intensity MPa | Loss of strength rate % | Rate of weight loss % |
| River sand 18 M2.5 | -20～25℃～+20℃ | ????25 | ????3.8 | ????4.6 | ??-17 | ????12 |
| Reclaimed sand-20M2.5 | -20～25℃～+20℃ | ????25 | ????4.0 | ????5.1 | ??-21.6 | ????15 |
| River sand 21 M5.0 | -20～25℃～+20℃ | ????25 | ????5.7 | ????5.9 | ??-3.3 | ????0 |
| Reclaimed sand-23M5.0 | -20～25℃～+20℃ | ????25 | ????5.6 | ????5.7 | ??-1.8 | ????0 |
| River sand 24 M7.5 | -20～25℃～+20℃ | ????25 | ????7.6 | ????7.8 | ??-2.6 | ????0 |
| Reclaimed sand-23M5.0 | -20～25℃～+20℃ | ????25 | ????9.0 | ????9.1 | ??-1.1 | ????0 |
| River sand 21 M5.0 | -20～25℃～+20℃ | ????25 | ????10.8 | ????11.0 | ??-2.6 | ????0 |
| Reclaimed sand-23M5.0 | -20～25℃～+20℃ | ????25 | ????11.2 | ????11.5 | ??-1.8 | ????0 |
The test of concrete carbonation properties
| Numbering | Ultimate compression strength Mpa before the carbonization | Ultimate compression strength Mpa after the carbonization | Carbonation depth mm | The carbonization coefficient |
| River sand 1 C15 | ????21.5 | ????28.9 | ????20 | ????1.3 |
| Reclaimed sand-13 C15 | ????22.1 | ????29.6 | ????20 | ????1.3 |
| River sand 2 C20 | ????25.8 | ????32.5 | ????20 | ????1.3 |
| Reclaimed sand-25 C20 | ????26.1 | ????33.2 | ????20 | ????1.3 |
| River sand 3 C25 | ????30.8 | ????37.1 | ????20 | ????1.2 |
| Reclaimed sand-29 C25 | ????31.2 | ????37.5 | ????20 | ????1.2 |
Concrete shrinkage and anti-permeability performance test
| Numbering | 3 days | 3 days | 28 days | 60 days | 90 days | Anti-penetration grade Mpa |
| River sand 2 C20 | ??0.11 | ????0.13 | ????0.14 | ????0.16 | ????0.16 | ????1.2 |
| Reclaimed sand-25 C20 | ??0.03 | ????0.08 | ????0.011 | ????0.11 | ????0.11 | ????1.2 |
| Reclaimed sand-29 C25 | ??0.01 | ????0.03 | ????0.06 | ????0.09 | ????0.09 | ????1.2 |
Claims (1)
1, a kind of processing method of producing preparing regenerated sand for building is characterized in that: make the processing method of preparing regenerated sand for building, comprise the following steps:
(1), tear buildings open after taking off building waste, become the building waste of the rubble state of 100mm * 100mm by mechanical disintegration;
(2), the building waste with the rubble state is the reclaimed sand of fine sand state once more by mechanical disintegration; The technical indicator of reclaimed sand: tap density: 1180kg/m
3, silt content: clod content 5.0%: water-intake rate (natural water-bearing) 1.5%: soundness 7%: Na
2So
4Saturated solution soak soundness qualified, always contain the brick amount: 0.18%, to be shallower than reference colour qualified for organic content %;
(3), utilize reclaimed sand preparation concrete and mortar, for improving the performance of concrete and mortar, reduce bleeding, increase flowability, the workability of mixed material, need the admixture toughener, the concrete mixture performance is reached: strength grade: C20, water cement ratio 0.58～0.59, toughener volume %:0～1, slump cm:5.0, unit weight kg/m
32245～2250, bleeding rate %:3.2～3.7, presetting period h:min7:50～8:30, final setting time h:min11:45～12:50, sand coarse aggregate ratio %:35～36;
(4), toughener by: 1 part of three ethanol peace, 2 parts of ferric oxide, 7 parts of flyash are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02132605A CN1390798A (en) | 2002-07-16 | 2002-07-16 | Process for preparing regenerated sand for building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02132605A CN1390798A (en) | 2002-07-16 | 2002-07-16 | Process for preparing regenerated sand for building |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1390798A true CN1390798A (en) | 2003-01-15 |
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ID=4746848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02132605A Pending CN1390798A (en) | 2002-07-16 | 2002-07-16 | Process for preparing regenerated sand for building |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701667A (en) * | 2012-03-28 | 2012-10-03 | 王军 | Novel thermal-insulation high-strength mortar of rice hull |
-
2002
- 2002-07-16 CN CN02132605A patent/CN1390798A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701667A (en) * | 2012-03-28 | 2012-10-03 | 王军 | Novel thermal-insulation high-strength mortar of rice hull |
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