CN109608077A - A kind of preparation method of modification regeneration aggregate and regeneration concrete - Google Patents

A kind of preparation method of modification regeneration aggregate and regeneration concrete Download PDF

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Publication number
CN109608077A
CN109608077A CN201811551269.3A CN201811551269A CN109608077A CN 109608077 A CN109608077 A CN 109608077A CN 201811551269 A CN201811551269 A CN 201811551269A CN 109608077 A CN109608077 A CN 109608077A
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parts
regeneration
modification
aggregate
water
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CN109608077B (en
Inventor
袁启涛
丁路静
高建
李喆
李微
蒋新峰
王立国
孙阳阳
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China West Construction North Co Ltd
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China West Construction Tianjin Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/10Coating or impregnating
    • C04B20/1055Coating or impregnating with inorganic materials
    • C04B20/1077Cements, e.g. waterglass
    • C04B20/1085Waterglass
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04Portland cements
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention belongs to the technical fields of regeneration concrete, disclose a kind of modification regeneration aggregate processing method, including recycled aggregate is impregnated 1-3h in modification liquid, by weight, modification liquid includes: 60-80 parts of the waterglass that mass concentration is 5%, 5-10 parts of silane coupling agent, 10-20 parts of organic siliconresin, 5-10 parts of kaolin, and modification regeneration concrete obtained has lower porosity;The invention also discloses a kind of regeneration concretes, by weight, it include following components: 250-300 parts of cement, 80-130 parts of flyash, 50-85 parts of miberal powder, 685-735 parts of sand, 646-874 parts of rubble, 202-398 parts above-mentioned of modification regeneration aggregate, 140-175 parts of water, 5-9 parts of water-reducing agent, 10-15 parts of glass fibre, in the case where a large amount of regeneration concretes are utilized, regeneration concrete obtained still compression strength with higher.

Description

A kind of preparation method of modification regeneration aggregate and regeneration concrete
Technical field
The present invention relates to the technical field of regeneration concrete, in particular to a kind of modification regeneration aggregate and regeneration concrete Preparation method.
Background technique
In construction projects, the dosage of concrete is maximum.In the raw material of concrete, aggregate dosage ranks first, and is body The product maximum component of specific gravity, accounts for the 60-70% of concrete material total volume.For a long time, because application regeneration is built in urban development The random mining of concrete bring natural sand stone resource causes massif vegetation deterioration, river damage.Discarded concrete is built Building refuse as recycled aggregate development and application in regeneration concrete, on the one hand solve the processing of a large amount of discarded concretes it is difficult with And ecological environment resulting from it is worsening the problems such as;On the other hand consumption of the construction industry to rubble can be reduced, to subtract Few exploitation to natural sand stone fundamentally solves rubble increasingly scarcity and a large amount of Exploit sand and stones and asks the destruction of ecological environment Topic, protects the living environment of the mankind.
However, the rough surface of recycled aggregate, porosity is big, is applied to regeneration concrete relative to natural aggregate In, the compression strength of the regeneration concrete after solidification is low.
Summary of the invention
In view of the shortcomings of the prior art, the purpose of the present invention one is to provide a kind of modification regeneration aggregate processing method, system Standby modification regeneration aggregate has the characteristics that water absorption rate is small.
The first purpose of this invention has the technical scheme that
A kind of modification regeneration aggregate processing method, including recycled aggregate is impregnated into 1-3h in modification liquid, by weight, change Property liquid include: mass concentration be 5% 60-80 parts of waterglass, 5-10 parts of silane coupling agent, 10-20 parts of organic siliconresin, kaolinite It is 5-10 parts native.
Further: by weight, modification liquid includes: 70 parts of the waterglass that mass concentration is 5%, silane coupling agent 8 Part, 15 parts of organic siliconresin, 7 parts of kaolin.
The purpose of the present invention two: a kind of modification regeneration aggregate of above-mentioned preparation method preparation is provided.
By using above scheme, the porosity of recycled aggregate is generally larger, has stronger water absorption rate, mixed for regenerating After in solidifying soil, water absorption is big, and the cohesiveness of the slurry in regeneration concrete is caused to be deteriorated, can not preferable package aggregate so that The compression strength of regeneration concrete is deteriorated.In the present invention, by the way that recycled aggregate to be soaked in modification liquid, to the hole of recycled aggregate Gap is closed, and the porosity of recycled aggregate is reduced, to promote the compression strength of regeneration concrete.
The purpose of the present invention three: providing a kind of regeneration concrete, includes following components by weight: cement 250- 300 parts, 80-130 parts of flyash, 50-85 parts of miberal powder, 685-735 parts of sand, 646-874 parts of rubble, above-mentioned modification regeneration aggregate 202-398 parts, 140-175 parts of water, 5-9 parts of water-reducing agent, 10-15 parts of glass fibre.
By using above scheme, since the hydro-thermalization of cement acts on, clear water regeneration concrete is internal in process of setting A large amount of heat can be discharged, causes inside clear water regeneration concrete and the temperature difference of external environment is larger, so that clear water regenerates coagulation Native mix is easy to appear the cracking phenomenas such as crackle in process of setting, the resistance to compression after thus reducing the solidification of clear water regeneration concrete Intensity.And preparation reasonable raw material proportioning of the invention, the hydro-thermal in clear water regeneration concrete process of setting can be substantially reduced Effect, thus reduces the internal-external temperature difference in clear water regeneration concrete process of setting, after thus improving the solidification of clear water regeneration concrete Compression strength.
Further: including following components by weight: 270 parts of cement, 100 parts of flyash, 60 parts of miberal powder, sand 718 parts, 646-1076 parts of rubble, 398 parts of modification regeneration aggregate as claimed in claim 3,155 parts of water, 7.3 parts of water-reducing agent, glass 12 parts of glass fiber.
By using above scheme, above-mentioned analysis is pointed out, the proportion for preparing raw material of regeneration concrete is solidified for reducing Hydro-thermalization effect in the process, improves being affected for the compression strength of regeneration concrete, and test proves, this kind proportion obtains The compression strength of regeneration concrete is maximum, that is, it is the most reasonable to prepare raw material proportioning.
Further: the recycled aggregate includes lightweight recycled aggregate and non-lightweight recycled aggregate, and lightweight recycled aggregate Weight ratio with non-lightweight recycled aggregate is 1:1-9.
Further: the water-reducing agent is polycarboxylate water-reducer.
Further: the cement is P.O42.5.
Further: the miberal powder uses S95 grades of miberal powders.
In conclusion the invention has the following advantages:
1, preparation reasonable raw material proportioning of the invention can substantially reduce the hydro-thermalization effect in regeneration concrete process of setting, Thus the internal-external temperature difference in regeneration concrete process of setting is reduced, the compression strength after thus improving regeneration concrete solidification;
2, in the present invention, by the way that recycled aggregate to be soaked in modification liquid, the hole of recycled aggregate is closed, reduces regeneration The porosity and water absorption rate of aggregate improve the cohesiveness of the slurry in regeneration concrete, thus improve the resistance to compression of regeneration concrete Intensity.
3, the partial size proportion for limiting recycled aggregate in regeneration concrete, prepares the regeneration concrete of high compressive strength.
Specific embodiment
Invention is further described in detail below.
Following cement used in the examples are P.O42.5, and miberal powder uses S95 grades of miberal powders, and the fineness modulus 2.6 of sand is broken Stone grain diameter is 5-30mm, and water-reducing agent is high-efficiency polycarboxylic acid water reducer, and the basic performance detection of recycled aggregate is as shown in table 1.
1 recycled aggregate basic performance of table
Embodiment 1
A kind of modified and light recycled aggregate, preparation method include that lightweight recycled aggregate is impregnated 1h in modification liquid, by weight Meter, modification liquid include: 60 parts of the waterglass that mass concentration is 5%, 5 parts of silane coupling agent, 10 parts of organic siliconresin, kaolin 5 Part.
Embodiment 2
A kind of modified and light recycled aggregate, preparation method include that lightweight recycled aggregate is impregnated 2h in modification liquid, by weight Meter, modification liquid include: 70 parts of the waterglass that mass concentration is 5%, 7 parts of silane coupling agent, 15 parts of organic siliconresin, kaolin 8 Part.
Embodiment 3
A kind of modified and light recycled aggregate, preparation method include that lightweight recycled aggregate is impregnated 3h in modification liquid, by weight Meter, modification liquid include: 80 parts of the waterglass that mass concentration is 5%, 10 parts of silane coupling agent, 20 parts of organic siliconresin, kaolin 10 parts.
Embodiment 4
A kind of modified and light recycled aggregate, preparation method are carried out by the method in embodiment 2, the difference is that, by weight Meter, modification liquid include: 60 parts of the waterglass that mass concentration is 5%, 5 parts of silane coupling agent, 10 parts of organic siliconresin, kaolin 5 Part.
Embodiment 5
A kind of modified and light recycled aggregate, preparation method are carried out by the method in embodiment 2, the difference is that, by weight Meter, modification liquid include: 80 parts of the waterglass that mass concentration is 5%, 10 parts of silane coupling agent, 20 parts of organic siliconresin, kaolin 10 parts.
Embodiment 6
A kind of non-lightweight recycled aggregate of modification, preparation method include that non-lightweight recycled aggregate is impregnated 2h in modification liquid, by weight Part meter is measured, modification liquid includes: 70 parts of the waterglass that mass concentration is 5%, 7 parts of silane coupling agent, 15 parts of organic siliconresin, kaolinite 8 parts of soil.
Embodiment 7
A kind of regeneration concrete is mixed by the component of following parts by weight: 250 parts of cement, 80 parts of flyash, 50 parts of miberal powder, 685 parts of sand, 646 parts of rubble, 202 parts of modification regeneration aggregate, 140 parts of water, 5 parts of water-reducing agent, 10 parts of glass fibre, wherein modified Recycled aggregate includes the modified and light recycled aggregate that weight ratio is 1:1 and modified non-lightweight recycled aggregate, and modified and light regenerates Aggregate and modified non-lightweight recycled aggregate are made by the method for embodiment 2 and embodiment 6 respectively.
Embodiment 8
A kind of regeneration concrete is mixed by the component of following parts by weight: 270 parts of cement, 100 parts of flyash, 60 parts of miberal powder, 718 parts of sand, 678 parts of rubble, 398 parts of modification regeneration aggregate, 155 parts of water, 7.3 parts of water-reducing agent, 12 parts of glass fibre, wherein change Property recycled aggregate include modified and light recycled aggregate and modified non-lightweight recycled aggregate that weight ratio is 1:2.5, and modified and light Recycled aggregate and modified non-lightweight recycled aggregate are made by the method for embodiment 2 and embodiment 6 respectively.
Embodiment 9
A kind of regeneration concrete is mixed by the component of following parts by weight: 300 parts of cement, 130 parts of flyash, 85 parts of miberal powder, 735 parts of sand, 874 parts of rubble, 398 parts of modification regeneration aggregate, 175 parts of water, 9 parts of water-reducing agent, 15 parts of glass fibre, wherein modified Recycled aggregate includes the modified and light recycled aggregate that weight ratio is 1:9 and modified non-lightweight recycled aggregate, and modified and light regenerates Aggregate and modified non-lightweight recycled aggregate are made by the method for embodiment 2 and embodiment 6 respectively.
Embodiment 10
A kind of regeneration concrete is prepared according to the method for embodiment 8, the difference is that: it is mixed by the component of following parts by weight It forms: 250 parts of cement, 80 parts of flyash, 50 parts of miberal powder, 685 parts of sand, 646 parts of rubble, 202 parts of modification regeneration aggregate, water 140 Part, 5 parts of water-reducing agent, 10 parts of glass fibre.
Embodiment 11
A kind of regeneration concrete is prepared according to the method for embodiment 8, the difference is that: it is mixed by the component of following parts by weight It forms: 300 parts of cement, 130 parts of flyash, 85 parts of miberal powder, 735 parts of sand, 874 parts of rubble, 398 parts of modification regeneration aggregate, water 175 Part, 9 parts of water-reducing agent, 15 parts of glass fibre.
Comparative example 1
A kind of regeneration concrete is prepared according to the method for embodiment 8, the difference is that: modification regeneration aggregate is replaced with broken Stone.
Comparative example 2
A kind of regeneration concrete is prepared according to the method for embodiment 8, the difference is that: lightweight recycled aggregate used and non-light Matter recycled aggregate directly prepares raw material with other and is mixed without impregnating modification.
Comparative example 3
A kind of regeneration concrete is prepared according to the method for embodiment 8, the difference is that: using the modified and light in embodiment 4 Recycled aggregate.
Comparative example 4
A kind of regeneration concrete is prepared according to the method for embodiment 8, the difference is that: using the modified and light in embodiment 5 Recycled aggregate.
The detection of modification regeneration aggregate performance
The performance of the recycled aggregate of embodiment 1-6 preparation is detected, the results are shown in Table 2.
The basic performance of 2 modification regeneration aggregate of table
Recycled aggregate Particle size range (mm) Water absorption rate (%) before modified Modified water absorption rate (%)
Embodiment 1 5-10 11.4 10.9
Embodiment 2 5-10 11.4 10.1
Embodiment 3 5-10 11.4 10.7
Embodiment 4 5-10 11.4 10.5
Embodiment 5 5-10 11.4 10.3
Embodiment 6 10-20 3.0 2.7
As can be seen from Table 2, place is modified to lightweight recycled aggregate and non-lightweight recycled aggregate using modification liquid of the invention After reason, the water absorption rate of lightweight recycled aggregate and non-lightweight recycled aggregate be decreased significantly, this illustrates that modification liquid can be effectively right The hole on recycled aggregate surface is closed, and the water absorption rate of recycled aggregate is thus reduced.Comparative example 2,4,5 can be seen that Modification liquid has larger impact with the sealing of hole effect for comparing recycled aggregate, wherein the proportion of the modification liquid in embodiment 2 is the most Rationally.
The detection of modification regeneration aggregate performance
The compressive property of the embodiment 7-9 and comparative example 1-2 regeneration concrete prepared is detected, the results are shown in Table 3.
3 regeneration concrete performance detection of table
Regeneration concrete 7 days compression strength (Mpa) 28 days compression strength (Mpa)
Embodiment 7 41 51
Embodiment 8 43 55
Embodiment 9 44 56
Embodiment 10 42 53
Embodiment 11 41 52
Comparative example 1 45 58
Comparative example 2 37 48
Comparative example 3 41 53
Comparative example 4 40 52
According to table 3, comparative example 8,10,11 as can be seen that preparation raw material proportioning to the compressive property of clear-water concrete have compared with It is big to influence, wherein the compression strength of the clear-water concrete of the preparation in embodiment 2 is maximum, illustrates to prepare raw material in embodiment 2 It is the most reasonable to match.This is because the hydro-thermalization due to cement acts on, in process of setting, inside can discharge clear-water concrete A large amount of heat, is caused inside clear-water concrete and the temperature difference of external environment is larger, so that clear-water concrete mix is solidifying It is easy to appear the cracking phenomenas such as crackle in the process, the compression strength after thus reducing clear-water concrete solidification.And system of the invention Standby reasonable raw material proportioning can substantially reduce the hydro-thermalization effect in clear-water concrete process of setting, thus reduce clear water coagulation Internal-external temperature difference in native process of setting, the compression strength after thus improving clear-water concrete solidification.
Comparative example 8,12,13 is as can be seen that between modified and light recycled aggregate and modified non-lightweight recycled aggregate There is larger impact with the compressive property for comparing regeneration concrete, wherein the proportion in embodiment 8 is the most suitable.
As can be seen that when not carrying out sealing of hole modification to recycled aggregate, regeneration is mixed for comparative example 8 and comparative example 2 The compression strength for coagulating soil declines to a great extent, in conjunction with comparison comparative example 3,4 can with it is further seen that, modification liquid it is mixed with regeneration is compared The compression strength for coagulating soil has larger impact, and the proportion for the modification liquid that lightweight recycled aggregate uses in embodiment 8 is the most reasonable, right The sealing of hole modification of lightweight recycled aggregate is most significant, and the compression strength of the regeneration concrete of acquisition is best.
In conjunction with comparative example 8 and comparative example 1 as can be seen that the compression strength of regeneration concrete prepared by the present invention with not Compression strength using the concrete of recycled aggregate is close, this is with the proportion for preparing raw material of regeneration concrete and to Regenerated Bone The sealing of hole modification of material is related.
Above-mentioned specific embodiment is only explanation of the invention, is not limitation of the present invention, art technology Personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as All by the protection of Patent Law in scope of the presently claimed invention.

Claims (9)

1. a kind of modification regeneration aggregate processing method, which is characterized in that including recycled aggregate is impregnated 1-3h in modification liquid, By weight, modification liquid includes: 60-80 parts of the waterglass that mass concentration is 5%, 5-10 parts of silane coupling agent, organic siliconresin 10-20 parts, 5-10 parts of kaolin.
2. a kind of modification regeneration aggregate processing method according to claim 1, which is characterized in that by weight, change Property liquid include: mass concentration be 5% 70 parts of waterglass, 8 parts of silane coupling agent, 15 parts of organic siliconresin, 7 parts of kaolin.
3. a kind of modification regeneration aggregate of preparation method preparation as claimed in claim 1 or 2.
4. a kind of regeneration concrete, which is characterized in that include following components by weight: 250-300 parts of cement, fine coal 80-130 parts grey, 50-85 parts of miberal powder, 685-735 parts of sand, 646-874 parts of rubble, modification regeneration aggregate as claimed in claim 3 202-398 parts, 140-175 parts of water, 5-9 parts of water-reducing agent, 10-15 parts of glass fibre.
5. a kind of regeneration concrete according to claim 4, which is characterized in that include following components by weight: 270 parts of cement, 100 parts of flyash, 60 parts of miberal powder, 718 parts of sand, 678 parts of rubble, modification regeneration aggregate as claimed in claim 3 398 parts, 155 parts of water, 7.3 parts of water-reducing agent, 12 parts of glass fibre.
6. a kind of regeneration concrete according to claim 4, it is characterised in that: the recycled aggregate includes lightweight Regenerated Bone Material and non-lightweight recycled aggregate, and the weight ratio of lightweight recycled aggregate and non-lightweight recycled aggregate is 1:1-9.
7. according to a kind of any regeneration concrete of claim 4-6, it is characterised in that: the water-reducing agent subtracts for polycarboxylic acids Aqua.
8. according to a kind of any regeneration concrete of claim 4-6, it is characterised in that: the cement is P.O42.5.
9. according to a kind of any regeneration concrete of claim 4-6, it is characterised in that: the miberal powder uses S95 grades of mines Powder.
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CN110156389A (en) * 2019-05-22 2019-08-23 陕西新意达恒众混凝土有限公司 A kind of production technology and concrete of concrete
CN110436837A (en) * 2019-08-26 2019-11-12 厦门美益兴业建材有限公司 A kind of renewable concrete and preparation method thereof
CN110526610A (en) * 2019-08-13 2019-12-03 温州市三箭混凝土有限公司 A kind of High Strength Regenerated Concrete and preparation method thereof
CN110818366A (en) * 2019-12-25 2020-02-21 泸州临港思源混凝土有限公司 Fair-faced concrete and preparation process thereof
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CN110156389A (en) * 2019-05-22 2019-08-23 陕西新意达恒众混凝土有限公司 A kind of production technology and concrete of concrete
CN110156389B (en) * 2019-05-22 2021-05-07 陕西新意达恒众混凝土有限公司 Concrete production process and concrete
CN110526610A (en) * 2019-08-13 2019-12-03 温州市三箭混凝土有限公司 A kind of High Strength Regenerated Concrete and preparation method thereof
CN110436837A (en) * 2019-08-26 2019-11-12 厦门美益兴业建材有限公司 A kind of renewable concrete and preparation method thereof
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CN111099862A (en) * 2020-02-21 2020-05-05 陕西融成伟业混凝土有限公司 Recycled concrete and preparation method thereof
CN111559895A (en) * 2020-06-01 2020-08-21 中国建材检验认证集团北京天誉有限公司 Low-water-absorption regenerated GRC material and preparation method thereof
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CN112608092A (en) * 2020-07-28 2021-04-06 厦门天润锦龙建材有限公司 Dry-mixed ground mortar prepared from recycled aggregate and preparation method thereof
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