CN103553503B - A kind of preparation method of C50 regeneration concrete of low gelling material - Google Patents
A kind of preparation method of C50 regeneration concrete of low gelling material Download PDFInfo
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- CN103553503B CN103553503B CN201310556552.6A CN201310556552A CN103553503B CN 103553503 B CN103553503 B CN 103553503B CN 201310556552 A CN201310556552 A CN 201310556552A CN 103553503 B CN103553503 B CN 103553503B
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- 239000004567 concrete Substances 0.000 title claims abstract description 100
- 239000000463 material Substances 0.000 title claims abstract description 17
- 230000008929 regeneration Effects 0.000 title claims abstract description 15
- 238000011069 regeneration method Methods 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims description 12
- 239000004568 cement Substances 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000004576 sand Substances 0.000 claims abstract description 28
- 239000012747 synergistic agent Substances 0.000 claims abstract description 23
- 239000010881 fly ash Substances 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 239000002893 slag Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 229920005646 polycarboxylate Polymers 0.000 claims abstract description 9
- 239000002699 waste material Substances 0.000 claims description 19
- 238000006062 fragmentation reaction Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 11
- 238000013467 fragmentation Methods 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000007858 starting material Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000011449 brick Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000013021 overheating Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- -1 admixture Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 15
- 238000002156 mixing Methods 0.000 description 14
- 238000012423 maintenance Methods 0.000 description 10
- 238000007493 shaping process Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
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- 238000011049 filling Methods 0.000 description 4
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- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000001354 calcination Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 235000011194 food seasoning agent Nutrition 0.000 description 2
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 2
- 229910052683 pyrite Inorganic materials 0.000 description 2
- 239000011028 pyrite Substances 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Abstract
The present invention relates to a kind of C50 regeneration concrete of low gelling material, comprise following composition: cement, reclaimed sand, coarse aggregate, flyash, ground blast furnace slag, admixture (polycarboxylate water-reducer and synergistic agent CTF), water ratio are 1 ︰ 2.15 ︰ 3.51 ︰ 0.18 ︰ 0.33 ︰ 0.04 ︰ 0.50.Wherein admixture is in polycarboxylate water-reducer: CTF synergistic agent is 4:1(mass ratio) ratio mix.After stirring 10 seconds by the water first dropping into coarse aggregate and reclaimed sand and 1/3, then drop into cement, flyash, ground blast furnace slag, the water of residue 2/3 and admixture.It is 90-120 second that churning time goes out the machine time from coarse aggregate and reclaimed sand input stirrer to concrete.
Description
[technical field]
The present invention relates to high grade C50 regeneration concrete, be specifically related to prepare with a kind of synergistic agent CTF, in raw material, fine aggregate is C50 concrete of reclaimed sand and preparation method thereof.
[background technology]
Concrete is indispensable important engineering materials in modern civil construction project.Along with the development of urban construction, reconstruction of the old city town and the building waste that produces is increasing, and the method processing a large amount of building waste at present buries hole or air storage, not only occupies cultivated land, contaminate environment, and cause the wasting of resources.The concrete strength of high grade requires higher; therefore can use when carrying out mix-design more gelling material particularly cement consumption ensure the quality of products; and cement clinker obtains by calcining natural or artificial ground as Wingdale, clay, pyrite etc.; the concrete of such production high grade not only costly, nor can carry out country about economizing on resources, the techno-economic policy of protection of the environment.
[summary of the invention]
The object of the invention is to a kind of synergistic agent CTF to be advantageously applied in regeneration concrete production, the intensity of C50 high-grade concrete still can be met when the proportioning of low cement amount and admixture reclaimed sand, so both achieve the recycling of building waste, decrease the consumption of cement in concrete simultaneously, thus solve consumption of natural resource, drawback that cost is high.
Another object of the present invention is to provide that configure with this synergistic agent CTF to take reclaimed sand as the preparation method of strength grade for C50 regeneration concrete of fine aggregate.CTF Concrete synergist Main Function is, when reducing consumption 10 ~ 15% of cement in concrete, can not only keep or promote concrete strength and weather resistance, and fresh concrete serviceability can also be improved, solving concrete admixture and cross problems such as mixing risk, is the energy-saving environmentfriendly products of a kind of high-tech.
C50 concrete of the present invention comprises its content of following composition by cement weight than calculating.
1 parts by weight of cement.
0.18 weight parts of fine coal ash.
0.33 weight part ground blast furnace slag.
2.15 weight part reclaimed sand.
3.51 weight part coarse aggregate.
0.50 weight part tap water.
0.04 weight part admixture (polycarboxylate water-reducer+CTF synergistic agent, additional proportion is 4:1 by quality ratio).
One is seen attached list according to mix calculation book of the present invention
Be bulk cement according to cement of the present invention be main, preferred P.O42.5 cement.
Be II grade of flyash according to flyash of the present invention.
Be S95 level ground blast furnace slag according to ground blast furnace slag of the present invention
According to reclaimed sand of the present invention be 2.8 by particle diameter≤5mm fineness modulus that building waste obtains through screening after fragmentation again, powder content 2.5%, clod content 0.8%, apparent density 2640Kg/m
3.
According to continuous grading, silt content 0.7%, clod content 0.2%, crush index 6.5%, apparent density 2650Kg/m that coarse aggregate of the present invention is particle diameter 5-25mm
3, flat-elongated particles content 5.6% stone.
The preparation technology of reclaimed sand: discarded concrete is transported in load hopper, with jaw crusher, building waste is carried out one-level fragmentation, and reinforcing bar is separated with concrete, adopt mechanical system by the plastics in building waste after one-level fragmentation, cloth, the foreign material such as brick and tile are rejected, with jaw crusher by the building waste after one-level fragmentation again broken (two-stage crushing) become to be less than 200mm block, and then send into (three grades of fragmentations) in eccentrically weighted shaft formula crusher and become the block of ﹤ 50mm, with electromagnetic deironing machine, the metallics in building waste after three grades of fragmentations is rejected, block after rejecting metal is sent in vertical liquid fuel stove and heat-treats, block is calcined at 300 DEG C by vertical liquid fuel stove, removing moisture, reduce its water ratio.Discarded concrete after Overheating Treatment is sent into axle horizontal type list storekeeper grinding machine, and grinding machine is the horizontal axis revolution steel cage that will have certain size gap, with sieve apparatus, the building waste after one-level grinding is sieved, be the vibratory screening apparatus of 5mm with mesh size, coarse aggregate particle diameter being more than or equal to 5mm sifts out, special feed bin is directly delivered to by rotary conveyor, the sand-cement slurry that particle diameter is less than 5mm is transported to horizontal axis wind sweep in tuber grinder and carry out secondary grinding, attention will install in tuber grinder that material is kicked up, flow control device additional.Finally with bag filter, levigate hardened cement paste powder is collected, send into feed bin and be in store for.
Be high-efficiency water-reducing agent of poly-carboxylic acid according to admixture one of the present invention, admixture two is the synergistic agent CTF of Guangzhou three fine horse building materials Science and Technology Ltd..
The C50 preparation method of concrete that the present invention uses synergistic agent CTF to prepare comprises:
1, starting material are taken by proportioning
2, first drop into coarse aggregate and reclaimed sand and 1/3 water stir 10 seconds after, then drop into cement, flyash, breeze, the water of residue 2/3 and admixture and continue to stir until evenly go out machine.
3, churning time goes out the machine time from coarse aggregate and reclaimed sand input stirrer to concrete is 90-120 second.
4, carrying out fillibility by the regulation of national standard method GB/T50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard " respectively to fresh concrete after concrete goes out machine, to test its result be divergence 600-700mm, expansion time 4.5s-5.0s; Gap is 35mm by its test result of property; Its test result of education resistance is 18%, and stability test result is 8%.Its test result is good, meets the properties data target required by C50 concrete.
5, concrete is tested as 245mm through 30 minutes slumps after going out machine, and divergence is 650-670mm; Test as 240mm through 60 minutes slumps, divergence is 630-650mm.
6, the concrete mixed and stirred is shaping in 15min after mixing, concrete mix spade good for mixing is mixed three times more back and forth, not stratifiedly once load die trial, when filling with substance spatula plugs and pounds along each die trial wall, and make concrete mix exceed die trial mouth, use shaking table vibration general 10 to 20 seconds aftershapings during concrete formation.Strike off die trial unnecessary concrete suitable for reading and use spatula floating.Put into concrete curing box and carry out maintenance.24 as a child form removals, after form removal, test block is moved to concrete mark support in carry out maintenance (mark support between temperature 20 ± 2 DEG C, humidity >=95%), the age of concrete reach 3 days, 7 days, 28 days time concrete test block is taken out, the method adopting " GB/T50081-2002 standard for test methods of mechanical properties of ordinary concrete " to provide carries out intensity detection to test block, and its intensity is respectively its intensity level of 35.5Mp, 49.8Mp, 63.5Mp and meets design strength.
The present invention, by adding synergistic agent CTF in the regeneration mortar of low gelling material, can be met the concrete intensity of common C50, have following beneficial effect after stirring:
1, cost is reduced
After adding synergistic agent CTF, the consumption of its gelling material especially cement decreases, and this will make concrete cost greatly reduce.
2, natural materials resource is saved
The maximum feature of the present invention is exactly save the consumption of cement on the one hand, realizes the refuse reclamation of building waste on the other hand.Because cement is obtained by the natural stone ore of calcining such as Wingdale, clay, pyrite etc., these natural resource can have been exploited one day, so the interpolation of synergistic agent CTF can save the exploitation of these natural resource greatly.In addition, it is natural sand that conventional concrete produces fine aggregate used, belongs to Nonrenewable resources, so both solves the pollution problem of building waste, broken away from again the dependency of concrete production to natural sand, this also carry out national about economizing on resources, the techno-economic policy of low-carbon environment-friendly.
3, have wide range of applications
C50 concrete is widely used in most of engineering, and mostly as the significant points of engineering, this invention is again be applied in regeneration concrete by CTF synergistic agent, and show good compatibility, therefore this synergistic agent has application space very widely.
[accompanying drawing explanation]
Accompanying drawing 1 is for preparing the process flow sheet of reclaimed sand.
Accompanying drawing 2 is the production technological process using synergistic agent CTF to prepare C50 regeneration concrete.
[embodiment]
Below in conjunction with specific embodiment, the present invention will be further described.Should be understood that following examples only to limit the scope of the invention for illustration of the present invention.
In the context of the present invention, described cement adopts P.O42.5 cement; Flyash adopts II grade of flyash; Breeze adopts S95 level ground blast furnace slag; Admixture is high-efficiency water-reducing agent of poly-carboxylic acid and synergistic agent CTF; Reclaimed sand particle diameter≤5mm, coarse aggregate size is 5-25mm.
The preparation of the C50 regeneration concrete sample of embodiment 1, use synergistic agent CTF preparation
Cement, reclaimed sand, coarse aggregate, flyash, ground blast furnace slag, admixture (polycarboxylate water-reducer and synergistic agent CTF), water is taken respectively with weight ratio 1 ︰ 2.15 ︰ 3.51 ︰ 0.18 ︰ 0.33 ︰ 0.04 ︰ 0.50 by the amount of often coiling 25 liters.Wherein the mixed ratio of polycarboxylate water-reducer and synergistic agent CTF is 4:1.After stirring 10 seconds by the water first dropping into coarse aggregate and reclaimed sand and 1/3, then drop into cement, flyash, breeze, the water of residue 2/3 and admixture.Stir 90-120 second.The concrete of mixing is shaping in 15min after mixing, and concrete mix spade good for mixing is mixed three times more back and forth, not stratifiedly once loads die trial, and when filling with substance spatula plugs and pounds along each die trial wall, and makes concrete mix exceed die trial mouth.Shaking table vibration general 10 to 20 seconds aftershapings are used during concrete formation.Strike off die trial unnecessary concrete suitable for reading and use spatula floating.Put into concrete curing box and carry out maintenance.Form removal after 24 hours, after form removal, test block is moved to concrete mark support in carry out maintenance, take out after 28 days, the method adopting " GB/T50081-2002 standard for test methods of mechanical properties of ordinary concrete " to provide carries out intensity detection to test block, intensity reaches 63.5Mp and reaches design strength, meets the concrete strength grade of C50.
Embodiment 2, the preparation of preparing the C50 regeneration concrete of low glue material and construction
As shown in Figure 2, first Entrustment Inspection is carried out to the starting material entered the station at stirring station, concrete optimum, after a series of correlation step such as proportioning application, by rotary conveyor, worm conveyor, admixture pump, water pump is by cement, reclaimed sand, coarse aggregate, flyash, ground blast furnace slag, admixture (polycarboxylate water-reducer and synergistic agent CTF), water is delivered to after electronic weighing balance measures, after stirring 10 seconds by the water first dropping into coarse-fine aggregate and 1/3 again, drop into cement again, flyash, the water of residue 2/3 and admixture continue to stir until evenly go out machine, load in concrete tank, be transported to working-yard.Wherein measuring raw materials permissible variation meets following table 1-1:
Table 1-1
Adopt concrete mixing and transporting car, concrete mixing and transporting car should take the measures such as sun-proof, cold-proof.Transport trolley is clean by the concrete washing that remains in car before splicing, and is drained by car internal water accumulation.In transportation, the cylinder of transport mixer remains a constant speed rotation, and speed should control at 3r/min ~ 5r/min, and forbids to add water in car.Transport trolley from splicing to time of discharging should complete at 90min, as need the shipping time be extended, corresponding effective technology measure can be taked.Before discharging, more than transport vehicle tank body fast rotational 20s can discharging.
When first checking concrete slump flow test and T50 expansion time after concrete delivery to working-yard, observe concrete mix simultaneously and whether outer bleeding and center aggregate packing phenomenon occur, after the assay was approved, can through the modes such as concrete tank self-unloading, concrete pump truck pumping, tower crane by concrete placement to needed for build position, to concrete surface, 3 times are carried out with trowel respectively for planar structural member concrete after having built, after initial set, before final set roll, with the crackle preventing concrete from producing because of the factor such as dehydration, drying shrinkage.Concrete strength reaches 1.2N/mm
2after, cover water seasoning with gunnysack or straw bag, during condition license, water storing conservation or spraying curing agent can carry out maintenance; After vertical structural member form removal, surface should cover and water seasoning with gunnysack or cotton-wadded quilt, also can the maintenance of brushing curing agent, and curing time is not less than 14 days, irrigation times keeps moisture state to determine, when daily mean temperature must not water lower than when 5 DEG C according to guarantee concrete.
The C50 regeneration concrete prepared by above synergistic agent CTF than the same concrete of common preparation on cost every cubic metre can save cement 44kg, and fine aggregate used is that building waste is through fragmentation, the reclaimed sand that screening obtains, so both decrease the demand of cement, solve again the refuse reclamation of building waste, meet the policy of the low-carbon environment-friendly that country advocates, belong to green energy resource project
Be significant and development prospect.
Comparative example
Comparative example 1(cement consumption improves, without synergistic agent CTF)
Cement, reclaimed sand, coarse aggregate, flyash, ground blast furnace slag, polycarboxylate water-reducer, water is taken respectively with weight ratio 1 ︰ 1.83 ︰ 2.99 ︰ 0.17 ︰ 0.26 ︰ 0.04 ︰ 0.84 by the amount of often coiling 15 liters.After stirring 10 seconds by the water first dropping into coarse-fine aggregate and 1/3, then drop into cement, flyash, breeze, the water of residue 2/3 and admixture and stir 90-120 second.The concrete of mixing is shaping in 15min after mixing, concrete mix spade good for mixing is mixed three times more back and forth, not stratifiedly once load die trial, when filling with substance spatula plugs and pounds along each die trial wall, and make concrete mix exceed die trial mouth, during concrete formation shaking table vibration 10 to 20 seconds shaping.Strike off die trial unnecessary concrete suitable for reading and use spatula floating, putting into concrete curing box and carry out maintenance.24 as a child form removals, after form removal, test block is moved to concrete mark support in carry out maintenance, take out after 28 days, the method adopting " GB/T50081-2002 standard for test methods of mechanical properties of ordinary concrete " to provide carries out intensity detection to test block, intensity reaches 65.2Mp, reaches design strength, but the concrete mixed out of this proportioning is apparently higher than the consumption of embodiment 1 gelling material used, improve product cost, uneconomical material benefit.
The identical cement consumption of comparative example 2(, without synergistic agent CTF)
Cement, reclaimed sand, coarse aggregate, flyash, ground blast furnace slag, polycarboxylate water-reducer, water is taken respectively with weight ratio 1 ︰ 2.15 ︰ 3.51 ︰ 0.18 ︰ 0.33 ︰ 0.04 ︰ 0.50 by the amount of often coiling 15 liters.After stirring 10 seconds by the water first dropping into coarse-fine aggregate and 1/3, then drop into cement, flyash, breeze, the water of residue 2/3 and admixture and stir 90-120 second.The concrete of mixing is shaping in 15min after mixing, concrete mix spade good for mixing is mixed three times more back and forth, not stratifiedly once load die trial, when filling with substance spatula plugs and pounds along each die trial wall, and make concrete mix exceed die trial mouth, during concrete formation shaking table vibration 10 to 20 seconds shaping.Strike off die trial unnecessary concrete suitable for reading and use spatula floating, putting into concrete curing box and carry out maintenance.24 as a child form removals, after form removal, test block is moved to concrete mark support in carry out maintenance, take out after 28 days, adopt " GB/T50081-2002 standard for test methods of mechanical properties of ordinary concrete " method of providing to carry out intensity detection to test block, intensity is 45.2Mp, does not reach design strength.
Table one
Claims (2)
1. the C50 regeneration concrete of one kind low gelling material, it is characterized in that raw material packet contains following composition, with mass ratio range: cement, reclaimed sand, coarse aggregate, flyash, ground blast furnace slag, admixture, water ratio is 1 ︰ 2.15 ︰ 3.51 ︰ 0.18 ︰ 0.33 ︰ 0.04 ︰ 0.50; Wherein admixture is polycarboxylate water-reducer and synergistic agent CTF, and additional proportion is 4:1 by quality ratio; Described cement is P.O42.5 cement, flyash is II grade of flyash, ground blast furnace slag is S95 level ground blast furnace slag, and reclaimed sand is is 2.8 by particle diameter≤5mm fineness modulus that building waste obtains through screening after fragmentation again, powder content 2.5%, clod content 0.8%, apparent density 2640Kg/m
3; Coarse aggregate is continuous grading, silt content 0.7%, clod content 0.2%, crush index 6.5%, the apparent density 2650Kg/m of particle diameter 5-25mm
3, flat-elongated particles content 5.6% stone;
The preparation technology of described reclaimed sand is as follows: be transported to by discarded concrete in load hopper, with jaw crusher, building waste is carried out one-level fragmentation, and reinforcing bar is separated with concrete, adopt mechanical system by the plastics in building waste after one-level fragmentation, cloth, brick and tile foreign material are rejected, with jaw crusher, the building waste two-stage crushing after one-level fragmentation is become to be less than 200mm block, and then to send in eccentrically weighted shaft formula crusher the block that three grades are broken into ﹤ 50mm, with electromagnetic deironing machine, the metallics in building waste after three grades of fragmentations is rejected, block after rejecting metal is sent in vertical liquid fuel stove and heat-treats, block is calcined at 300 DEG C by vertical liquid fuel stove, removing moisture, reduce its water ratio, discarded concrete after Overheating Treatment is sent into axle horizontal type list storekeeper grinding machine, and grinding machine is the horizontal axis revolution steel cage that will have certain size gap, with sieve apparatus, the building waste after one-level grinding is sieved, be the vibratory screening apparatus of 5mm with mesh size, coarse aggregate particle diameter being more than or equal to 5mm sifts out, special feed bin is directly delivered to by rotary conveyor, the sand-cement slurry that particle diameter is less than 5mm is transported to horizontal axis wind sweep in tuber grinder and carry out secondary grinding, attention will install in tuber grinder that material is kicked up, flow control device additional, finally the cement slurry powder bag filter after secondary grinding is collected, send into feed bin and be in store for,
The C50 regeneration concrete of described low gelling material is prepared in accordance with the following methods: take starting material by proportioning; First drop into coarse aggregate and reclaimed sand and 1/3 water stir 10 seconds after, then drop into cement, flyash, ground blast furnace slag, the water of residue 2/3 and admixture and continue to stir until evenly go out machine; It is 90-120 second that churning time goes out the machine time from coarse aggregate and reclaimed sand input stirrer to concrete.
2. the preparation method of regeneration concrete described in claim 1, comprising: take starting material by proportioning; First drop into coarse aggregate and reclaimed sand and 1/3 water stir 10 seconds after, then drop into cement, flyash, ground blast furnace slag, the water of residue 2/3 and admixture and continue to stir until evenly go out machine; It is 90-120 second that churning time goes out the machine time from coarse aggregate and reclaimed sand input stirrer to concrete.
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| CN104058673B (en) * | 2014-07-04 | 2016-03-02 | 北京东方建宇混凝土科学技术研究院有限公司 | A kind of lightweight aggregate concrete containing low-quality regeneration aggregate and preparation method thereof |
| CN105367004A (en) * | 2015-11-27 | 2016-03-02 | 山西四建集团有限公司 | C30 durable recycled shaping aggregate concrete prepared from construction wastes and preparation method |
| CN105712679A (en) * | 2016-01-27 | 2016-06-29 | 西京学院 | Preparation method of nano mineral powder composite aramid fiber reinforced recycled concrete |
| CN107686292A (en) * | 2017-09-25 | 2018-02-13 | 贵州安凯达实业股份有限公司 | A kind of concrete |
| CN108529975A (en) * | 2018-05-11 | 2018-09-14 | 郑涛涛 | A kind of concrete and preparation method thereof |
| CN115626796B (en) * | 2022-09-08 | 2023-11-24 | 深圳市衡骏环保科技有限公司 | Recycled aggregate self-compacting concrete |
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| CN102249583A (en) * | 2011-04-19 | 2011-11-23 | 上海德滨环保科技有限公司 | Method for calcining building garbage regenerated aggregate |
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| CN102249583A (en) * | 2011-04-19 | 2011-11-23 | 上海德滨环保科技有限公司 | Method for calcining building garbage regenerated aggregate |
Non-Patent Citations (1)
| Title |
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| "CTF增效剂在高强混凝土中的试验研究";孙辉涛等;《商品混凝土》;20130815(第8期);第41-42页 * |
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