CN102390963B - Recycled aggregate medium-dry hard concrete prepared by using building waste and preparation method of recycled aggregate medium-dry hard concrete - Google Patents
Recycled aggregate medium-dry hard concrete prepared by using building waste and preparation method of recycled aggregate medium-dry hard concrete Download PDFInfo
- Publication number
- CN102390963B CN102390963B CN 201110239638 CN201110239638A CN102390963B CN 102390963 B CN102390963 B CN 102390963B CN 201110239638 CN201110239638 CN 201110239638 CN 201110239638 A CN201110239638 A CN 201110239638A CN 102390963 B CN102390963 B CN 102390963B
- Authority
- CN
- China
- Prior art keywords
- aggregate
- concrete
- recycled
- cement
- hard concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a recycled aggregate medium-dry hard concrete prepared by using building waste, which comprises the following raw materials of coarse aggregate, fine aggregate, a gelatinizing agent, a water reducing agent and water, wherein the gelatinizing agent comprises cement and coal ash, and the coarse aggregate comprises 50-100 percent of recycled coarse aggregate prepared from the building waste. A preparation method of the recycled aggregate medium-dry hard concrete comprises the following steps of: pretreating the building waste, removing impurities, remaining waste concrete, waste bricks and the like; crushing and screening to prepare the recycled coarse aggregate; mixing the recycled coarse aggregate, natural sand, cement and water according to the proportion, adding the coal ash and the water reducing agent, stirring uniformly to obtain a mixture; and squeezing and forming the mixture, curing for 2 days to obtain the recycled aggregate medium-dry hard concrete. The invention solves the problems of worsening ecological environment and the like caused by difficulty in treating the building waste; and the building wastes are used for manufacturing the recycled aggregate for replacing natural aggregate, the increasingly deficient natural aggregate and damage degree to the ecological environment are reduced, and the living environment of human beings is protected. The recycled aggregate medium-dry hard concrete prepared by using the method has high strength and high abrasive resistance, and can be used for building base installations such as city roads, housing constructions and the like.
Description
Technical field
The present invention relates to a kind of half lowslump concrete and preparation method thereof, specifically a kind of regeneration aggregate half lowslump concrete and method thereof of utilizing the building castoff preparation.
Background technology
Concrete divides by the workability of mix, has lowslump concrete, half lowslump concrete, plastic concrete, liquid concrete, high-flowing concrete and chutable concrete etc. several.Generally the call ultra-dry stiff concrete of mixing concrete thing consistometric value greater than 30s, to the lowslump concrete that is called between the 30s, consistometric value is less than half lowslump concrete that is called of 20s at 20s for consistometric value.The construction work normal concrete was called the normal concrete mixture before setting and harden not.It must have good denseness is workability, is convenient to the constructing operation such as mix, transportation, pouring, tamping, has the performance that quality is even, moulding is closely knit.After the normal concrete mix setting and harden, should have enough intensity, with the weather resistance of bearing design load and should have that guarantees that buildings can be safe.Workability is comprehensive technological property of normal concrete mix, and it comprises the implication of three aspects such as flowability, glutinous poly-property and full water-based.
Along with the quickening of the Development of Urban process of China's modernization construction, large-scale new town construction and reconstruction of the old city town cause the increasing of building castoff.The waste that building castoff refers to build, produce when repairerment and demolition of buildings has useless tile block, barren rock material, concrete blocks, sand-lime soil usually.Present most of waste concrete all is unprocessed direct stacking or landfill, has not only taken a large amount of soils, contaminate environment, and has caused a large amount of wastes of resource.Because China built in the last few years on a large scale, had expended the material of construction such as a large amount of sand, stone and cement always.The natural resource such as a large amount of exploitation sand, stone cause resource nervous, environmental degradation.People inquire into the waste concrete recycling, mainly are to be prepared as regeneration aggregate or building slab.Because the physicals of waste concrete and natural building material has larger difference, and is larger such as the waste concrete water-intake rate, is generally 3.6～8%, and the water-intake rate of natural aggregate can not guarantee construction quality and work-ing life less than 3% as adopting usual method.
" constructional method of lowslump concrete " patent No. 201010501877.0 of Chinese patent literature report, " a kind of preparation method of hard concrete sample " patent No. 201010501859, all are lowslump concrete constructional methods, half lowslump concrete is not also arranged, particularly the patent report of regeneration aggregate half lowslump concrete constructional method.Half lowslump concrete generally is used in foundation works, and usage quantity is very large.
Summary of the invention
The object of the invention is to for the building castoff resource utilization, be prepared as coarse aggregate with building castoff, prepare half lowslump concrete with this coarse aggregate, a kind of regeneration aggregate half lowslump concrete of building castoff preparation and technical scheme of method thereof utilized is provided.
For achieving the above object, the present invention is achieved by the following technical solutions: regeneration aggregate half lowslump concrete that utilizes the building castoff preparation, it is characterized in that, raw material by following weight parts forms, coarse aggregate 1200～1320, fine aggregate 580～620, jelling agent 320～420, water reducer and water, described jelling agent is cement and flyash, cement accounts for 60～90% of jelling agent, flyash accounts for 10～40% of jelling agent, water reducer is cement amount 0.3～0.5%, water is 150 ± 10, contain 50～100% regenerated coarse aggregates of being made by building castoff in the described coarse aggregate, described fine aggregate is natural matter, the ultimate compression strength of half lowslump concrete is more than or equal to 30Mpa, and its slump value is less than 10mm, and consistometric value is less than 20s.
Described cement is general purpose portland cement strength grade 32.5, and water reducer is commercially available high efficiency water reducing agent.
Utilize the preparation method of regeneration aggregate half lowslump concrete of building castoff preparation, it is characterized in that, concrete steps are as follows:
1) building castoff is carried out pre-treatment, remove foreign material, keep waste concrete, useless brick, waste mortar;
2) to waste concrete, useless brick, waste mortar fragmentation, screening, making particle diameter is regenerated coarse aggregate in the particulate matter of 4.75～31.5mm;
3) according to proportioning regenerated coarse aggregate, natural sand, cement, water are mixed, other adds a small amount of flyash, water reducer, stirs to obtain mixture;
4) above-mentioned mixture is molded through shaking, maintenance in 28 days namely gets regeneration aggregate half lowslump concrete material.
Waste concrete, useless brick, waste mortar account for more than 70% in building castoff, these waste complicateds, and enormous amount is the Focal point and difficult point of processing building castoff.Half lowslump concrete foundation works in construction work is occupied significant proportion, and foundation works adopts half lowslump concrete usually.The present invention for the preparation of the coarse aggregate in half lowslump concrete, because foundation works materials amount is large, can consume a large amount of coarse aggregates with building castoff for the building castoff resource utilization.The coarse aggregate of building castoff preparation is compared with the coarse aggregate of natural materials preparation, has water-absorbent strong, the characteristics that ash is many, regeneration aggregate half lowslump concrete of the present invention is compared with common regenerated aggregate concrete, there is certain difference in intensity and aspect of performance, but the adding because of flyash and water reducer, water consumption and the cement consumption of regeneration aggregate half lowslump concrete are all less, ultimate compression strength and folding strength are higher, shrinkage strain is little, and disconnected plate rate is little, can be used to prepare pavement material, and the brick materials for wall, have highly application value.The present invention can substitute natural coarse aggregate 50～100% with the coarse aggregate of building castoff preparation, makes jelling agent 10-40% with coal ash instead cement.One aspect of the present invention has solved a large amount of building castoff difficult treatment, and by problems such as the ecotope that it causes go from bad to worse; On the other hand; make regeneration aggregate with building castoff and substitute natural aggregate; can reduce construction industry to natural resource consumption; thereby reduce the exploitation to natural sandstone; reduce the day by day deficient and a large amount of sandstones of natural aggregate and exploited the destructiveness that ecotope is caused; protect human living environment, guaranteed the Sustainable development of human society, met the requirement of Sustainable development.Regeneration aggregate half lowslump concrete that the present invention prepares has high strength, high-wearing feature, can be used for the construction of the Infrastructure such as urban road and building construction.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed, complete explanation:
Utilize regeneration aggregate half lowslump concrete of building castoff preparation.According to " design of common concrete proportioning rules " (JGJ55-2000), take the C30 concrete mix as benchmark, with reference to " highway cement concrete pavement construction technique normalizing " (JTG F30-2003), " general purpose portland cement " (GB 175-2007) and " flyash concrete utilisation technology standard " (GBJ 146-90).
1, raw material
Raw material by following weight forms, coarse aggregate 1200～1320, fine aggregate 580～620, jelling agent 320～420, water reducer and water, described jelling agent is cement and flyash, cement account for jelling agent 60～90%, flyash accounts for 10～40% of jelling agent, water reducer is cement amount 0.3～0.5%, and water is 150 ± 10.The concrete raw material of each embodiment sees Table 1.Contain 50～100% regenerated coarse aggregates of being made by building castoff in the described coarse aggregate, described fine aggregate is natural matter, and the ultimate compression strength of half lowslump concrete is more than or equal to 30
Mpa, its slump value is less than 10mm, and consistometric value is less than 20s.Regeneration aggregate half lowslump concrete proportioning is calculated by " design of common concrete proportioning rules ", about 1 cube of concrete.
Wherein:
(1) coarse aggregate is, the building castoff of reconstruction of village-in-city grades technique and the regenerated coarse aggregate of particle diameter in 4.75mm～31.5mm scope that obtain through artificial separation, jaw crushing, vibratory screening apparatus, and major ingredient is waste concrete, useless brick, waste mortar.The regenerated coarse aggregate grating is, particle diameter 4.75 mm～9.5 mm account for 22%, and particle diameter 9.5mm～19.0mm accounts for 53%, and particle diameter 19.0mm～31.5 mm account for 25%.Natural aggregate is cobble, rubble.Grating such as the table 1 of coarse aggregate,
(2) the natural fine aggregate is common building with river sand, mountain sand or stone flour, maximum particle diameter 4.75mm, and continuous grading, it is 2.500,1.250,0.630,0.315 and the summation of the sieve accumulated retained percentage in five kinds of apertures such as 0.160mm.
(3) cement is Portland blastfurnaceslag cement, strength grade 32.5,28 days ultimate compression strength of cement is 32.5 Mpa, cement is as concrete gelling material, the solidifying slurry of cement plays conclusive effect to concrete quality, and its Main Function is: the hole that is wrapped in aggregate surface and filler aggregate; Be lubricant lubricate between gathering materials at concrete coagulation sclerosis previous crops, make the mixing concrete thing have the workability that is suitable for constructing; When concrete coagulation hardens, strengthen the cohesive force between the aggregate, make mixed mirror soil reach needed intensity, weather resistance etc.
(4) flyash is the ash discharge of the Yang Zonghai of Yunnan Province power plant dry.Flyash mixes in the concrete in right amount, can partly replace cement, can not only save cement consumption, reduce Cost of Concrete, and can also improve the workability of mixing concrete thing, because flyash has activation, the hydration reaction of regeneration aggregate surface residual cement mortar can be strengthened, the performances such as concrete density, impermeability and chemical resistance can also be improved.
(5) water reducer is, the good growing concrete admixture in Kunming is sold the sky skill board FDN-2 high efficiency water reducing agent that limited liability company sells, and major ingredient is: the high condenses of β-naphthalenesulfonateformaldehyde formaldehyde.Water reducer can be saved mixing water content, increases concrete flowability, improves concrete workability, the reduction of erection time, accelerate works progress, and also can save the engineered cementitious consumption, have good economic benefit.Simultaneously can also strengthen concrete intensity.
2, preparation method:
(1) regenerated coarse aggregate, fine aggregate, cement, water are mixed, other adds a small amount of flyash, water reducer, stirs, and wherein: water-cement ratio is 0.3～0.5, the water reducer volume is cement amount 0.3～0.5%.
(2) adopt the molded technique of shaking, frequency is 2860 minutes/time, and amplitude is 0.5mm, and upper surface pressure is 0.6Mpa, and time of vibration is under the condition of 15s, carries out maintenance, namely can obtain regeneration aggregate half lowslump concrete.
(3) check: before maintenance, detect the slump, denseness.Prepared 28 days compression strength value 39.54Mpa of regeneration aggregate half lowslump concrete, its slump value 8mm, consistometric value 14s.
3, purposes
Utilize regeneration aggregate half lowslump concrete of building castoff preparation to can be used to prepare ultimate compression strength at regenerated aggregate concrete pavement material and the regenerated aggregate concrete brick of C30 and following requirement of strength.
Table 1
Table 2
Claims (1)
1. utilize regeneration aggregate half lowslump concrete of building castoff preparation, it is characterized in that, raw material by following weight parts forms, coarse aggregate 1200～1320, fine aggregate 580～620, jelling agent 320～420, water reducer and water, described jelling agent is cement and flyash, cement accounts for 60～90% of jelling agent, flyash accounts for 10～40% of jelling agent, water reducer is cement amount 0.3～0.5%, water is 150 ± 10, contain 50～100% regenerated coarse aggregates of being made by building castoff in the described coarse aggregate, described building castoff is concrete, useless brick, waste mortar, described fine aggregate is natural matter, the ultimate compression strength of half lowslump concrete is more than or equal to 30MPa, and its slump value is less than 10mm, and consistometric value is less than 20s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110239638 CN102390963B (en) | 2011-08-19 | 2011-08-19 | Recycled aggregate medium-dry hard concrete prepared by using building waste and preparation method of recycled aggregate medium-dry hard concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110239638 CN102390963B (en) | 2011-08-19 | 2011-08-19 | Recycled aggregate medium-dry hard concrete prepared by using building waste and preparation method of recycled aggregate medium-dry hard concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102390963A CN102390963A (en) | 2012-03-28 |
| CN102390963B true CN102390963B (en) | 2013-01-02 |
Family
ID=45858372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110239638 Expired - Fee Related CN102390963B (en) | 2011-08-19 | 2011-08-19 | Recycled aggregate medium-dry hard concrete prepared by using building waste and preparation method of recycled aggregate medium-dry hard concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102390963B (en) |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130473B (en) * | 2013-03-05 | 2014-04-09 | 新奥生态建材有限公司 | C20 self-compaction concrete prepared from recycled aggregate and preparation method thereof |
| CN103290753A (en) * | 2013-05-28 | 2013-09-11 | 深圳海龙建筑制品有限公司 | Nano-composite environment-friendly water permeable brick and production method thereof |
| CN103570317B (en) * | 2013-11-15 | 2015-09-30 | 北京新奥混凝土集团有限公司 | A kind of clear-water concrete using construction refuse regenerated aggregate to produce |
| CN103936318B (en) * | 2014-03-18 | 2016-01-20 | 沈阳建筑大学 | Waste fiber regenerated aggregate concrete that can improve aggregate performance and preparation method thereof |
| CN103979884B (en) * | 2014-04-30 | 2015-10-14 | 太原理工大学 | A kind of method utilizing discarded concrete to prepare coal mine filling lotion |
| CN104276774A (en) * | 2014-09-23 | 2015-01-14 | 廊坊荣盛混凝土有限公司 | Novel concrete admixture produced by utilizing waste concrete and mortar |
| CN104446175A (en) * | 2014-10-30 | 2015-03-25 | 南昌大学 | Recycled high-performance concrete and preparation method thereof |
| CN104556766A (en) * | 2015-01-27 | 2015-04-29 | 安徽同济建设集团有限责任公司 | Construction method for building foundation bed employing recycled concrete |
| CN104944856B (en) * | 2015-06-17 | 2017-05-31 | 东南大学 | A kind of regeneration concrete method for preparing stability |
| CN105198305A (en) * | 2015-08-14 | 2015-12-30 | 陕西九长建设总公司 | Method for producing wall material with construction waste |
| CN105294009A (en) * | 2015-11-05 | 2016-02-03 | 三明学院 | Preparation method and application of self-insulation recycled concrete |
| CN106186853A (en) * | 2016-06-29 | 2016-12-07 | 攀枝花学院 | A kind of preparation method of regeneration concrete |
| CN106242400B (en) * | 2016-08-03 | 2019-10-18 | 韦振兴 | A method of material is prepared using aggregate |
| CN106495587A (en) * | 2016-10-26 | 2017-03-15 | 成都大学 | New concrete prepared by a kind of utilization discarded concrete |
| CN106830792B (en) * | 2017-01-18 | 2019-07-16 | 广州中茂园林建设工程有限公司 | Mixed with useless brick and the concrete of regeneration coarse aggregate and preparation method thereof |
| CN106747642A (en) * | 2017-03-06 | 2017-05-31 | 龚家红 | Environmental protection sound insulation water-proof concrete wall brick and preparation method thereof |
| CN107216094A (en) * | 2017-07-04 | 2017-09-29 | 河南理工大学 | The method that a kind of utilization building castoff and sludge prepare revetment brick |
| CN107500630A (en) * | 2017-09-18 | 2017-12-22 | 重庆交通大学 | The grinding coagulation soil prepared using fluidized bed ash and discarded concrete |
| CN107746196A (en) * | 2017-11-07 | 2018-03-02 | 广州市住宅建设发展有限公司 | High performance concrete aggregate and high performance concrete |
| CN109761554A (en) * | 2017-11-09 | 2019-05-17 | 湘潭大学 | A kind of regeneration concrete kerbstone of building solid waste preparation |
| CN108706928A (en) * | 2018-05-30 | 2018-10-26 | 郑州大学 | A kind of brick concrete mixed regeneration coarse aggregate concrete and preparation method thereof |
| CN108911623A (en) * | 2018-07-06 | 2018-11-30 | 郑州大学 | A kind of polypropylene fibre regeneration brick concrete coarse aggregate concrete and its preparation process |
| CN108892453A (en) * | 2018-08-25 | 2018-11-27 | 北京建工新型建材有限责任公司 | A kind of dry concrete applied to airplane parking area |
| CN109180104A (en) * | 2018-09-27 | 2019-01-11 | 辽宁科技大学 | A kind of regeneration concrete follows closely brick and preparation method thereof admittedly |
| CN109648685A (en) * | 2018-12-10 | 2019-04-19 | 天津科技大学 | The method for preparing water-permeable brick using the unburned aggregate of Dredged bed mud |
| CN110282920A (en) * | 2019-05-16 | 2019-09-27 | 中铁十六局集团第五工程有限公司 | A kind of C25 grades of regeneration concrete |
| CN110423066A (en) * | 2019-08-12 | 2019-11-08 | 陕西省建筑科学研究院有限公司 | A kind of full brick slag regenerated aggregate concrete light cellular partition board and preparation method thereof |
| CN112028565A (en) * | 2020-08-03 | 2020-12-04 | 广东工业大学 | Recycled coarse aggregate seawater sea sand concrete and preparation method and application thereof |
| CN112663638A (en) * | 2020-12-24 | 2021-04-16 | 山东乾正新材料科技有限公司 | Slope protection for expressway and processing technology thereof |
| CN112851231A (en) * | 2021-01-16 | 2021-05-28 | 娄城环保(苏州)有限公司 | Cement-based dry and hard concrete using calcium fluoride sludge as aggregate |
| CN114380557B (en) * | 2022-01-26 | 2022-12-16 | 广东华南混凝土有限公司 | High-strength environment-friendly concrete for pavement and preparation method thereof |
| CN115057676A (en) * | 2022-06-08 | 2022-09-16 | 北京都市绿源环保科技有限公司 | Waste-doped low-carbon fertilizer tank concrete |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1562858A (en) * | 2004-03-25 | 2005-01-12 | 同济大学 | Mix material of zoology concrete in use for bearing structure and preparation method |
-
2011
- 2011-08-19 CN CN 201110239638 patent/CN102390963B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1562858A (en) * | 2004-03-25 | 2005-01-12 | 同济大学 | Mix material of zoology concrete in use for bearing structure and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102390963A (en) | 2012-03-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102390963B (en) | Recycled aggregate medium-dry hard concrete prepared by using building waste and preparation method of recycled aggregate medium-dry hard concrete | |
| CN101139193B (en) | Regenerative concrete composite material and method for making same | |
| CN106830777B (en) | The regeneration fill concrete of consumer waste incineration residue preparation and its application | |
| CN111807782B (en) | Fluid-state solidification regeneration mixture, preparation method and application thereof in pit backfill | |
| CN101805161B (en) | Baking-free brick cementing agent prepared from drilling solid waste | |
| Ingalkar et al. | Replacement of natural sand by crushed sand in the concrete | |
| CN103755267A (en) | Sludge concrete and preparation method thereof | |
| CN107382216A (en) | Fill high-strength concrete of iron tailings and building waste and preparation method thereof | |
| CN107879681A (en) | A kind of concrete slurry, alkali-activated carbonatite lightweight rubber regeneration concrete and preparation method thereof | |
| CN107021700A (en) | Concrete regenerating component containing building waste aggregate and preparation method thereof | |
| CN115594446A (en) | Preparation method of green concrete based on sludge and waste concrete | |
| CN114163174B (en) | Solid waste base modified cementing material and application thereof | |
| CN101161602A (en) | Brick made of scrap and method of manufacture | |
| Kumar et al. | Evaluation of strength characteristics and identifying the optimum dosage with the impact of partial replacement of recycled fine and coarse aggregate from construction and demolition waste | |
| CN107098638A (en) | Insulation blocks containing building waste aggregate and preparation method thereof | |
| CN101362360B (en) | Method for pressing civil engineering block from sludge solidification material | |
| CN104692771A (en) | Road paving material prepared from construction waste composite sludge and preparation method of road paving material | |
| CN108996963B (en) | concrete pavement brick and preparation method thereof | |
| Sadek et al. | UTILIZATION OF SOLID WASTES IN CEMENT BRICKS FOR AN ENVIRONMENTAL BENEFICIAL. | |
| CN109748550A (en) | The preparation method of regenerated aggregate concrete ecological brick | |
| CN1275896C (en) | Coagulated stone brick and holllow building block | |
| Naidu et al. | A study on the properties of concrete on partial replacement of cement and sand with copper slag | |
| AU2021106229A4 (en) | Smart rigid pavement | |
| Kumar et al. | INVESTIGATION IN DEVELOPING LOW-COST CONCRETE BY USING BRICK POWDER AND QUARRY STONE DUST | |
| Doğan et al. | Mechanical Properties of Recycled Aggregates From Construction Demolition Waste |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20180819 |