CN110104997A - A kind of regeneration concrete and its production technology - Google Patents
A kind of regeneration concrete and its production technology Download PDFInfo
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- CN110104997A CN110104997A CN201910348028.7A CN201910348028A CN110104997A CN 110104997 A CN110104997 A CN 110104997A CN 201910348028 A CN201910348028 A CN 201910348028A CN 110104997 A CN110104997 A CN 110104997A
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- Prior art keywords
- aggregate
- coarse aggregate
- concrete
- regeneration
- fine aggregate
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Classifications
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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
- C04B20/00—Use 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
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of regeneration concrete and its production technologies, are made of the raw material comprising following weight: 100~112 parts of coarse aggregate, 68~75 parts of fine aggregate, 27~33 parts of cement, 15~22 parts of mineral admixture, 5~10 parts of fiber, 3~8 parts of rubber grain, 13~19 parts of water and 0.6~1.0 part of additive；Coarse aggregate includes modification regeneration coarse aggregate and common coarse aggregate, and modification regeneration coarse aggregate is using nano material and silica solution as modifying agent to the granule modified acquisition of waste and old concrete；Fine aggregate includes recycled fine aggregate and common fine aggregate;The advantages of it has compression strength, flexural strength and the drying shrinkage value for improving concrete, improves agent on crack resistance of concrete folding, impervious, anti-corrosion, shock resistance and wear-resisting property.The preparation method of regeneration concrete includes: detection, metering, mixing, stirring and maintenance；Preparation method of the invention has production. art simple, safe operation and advantage easy to implement.
Description
Technical field
The present invention relates to construction engineering technical field, more specifically, it relates to a kind of regeneration concrete and its production
Technique.
Background technique
Concrete refers to using cement as major gelled material, with water, sand and stone, mixes chemical admixture and mine when necessary
Polymer blends material is cooperated by proper proportion, by artificial stone made of uniform stirring, closely knit molding and maintenance hardening.Regeneration is mixed
Solidifying soil refers to discarded concrete block after broken, cleaning, classification, mixes by a certain percentage with gradation, partly or entirely
Instead of the natural aggregates such as sandstone (mainly coarse aggregate), novel concrete made of the cooperation such as cement, water is added.Regeneration concrete
Can have following several situations by the combining form gathered materials: gather materials all regenerated aggregates；Coarse aggregate is regenerated aggregate, fine aggregate
For natural sand；Coarse aggregate is natural rubble or cobble, fine aggregate are regenerated aggregate；Regenerated aggregate substitutes part coarse aggregate or thin collection
Material.
Application publication number is that the Chinese patent of CN108314385A discloses a kind of C40 regeneration concrete, constituent
Including cement, water, fine aggregate and coarse aggregate, the cement, water, fine aggregate and coarse aggregate match ratio be 1:0.49:1.55:
3.3；The coarse aggregate includes common coarse aggregate and regenerated coarse aggregate, wherein the match ratio of common coarse aggregate and regenerated coarse aggregate is
The partial size of 1:1.5, common coarse aggregate and regenerated coarse aggregate is 5mm~26.5mm；Regenerated coarse aggregate used is concrete waste material；
The common coarse aggregate is basalt.The concrete of the method preparation has good intensity, and technique through the invention
Simply, production cost is low.
Prior art among the above has the following deficiencies: regenerated coarse aggregate in shattering process by larger outer masterpiece
With, it will appear a large amount of microscopic checks in inside, it is big so as to cause regenerated aggregate porosity, so that the water absorption rate of recycled aggregate and suction
Water speed rate is all much higher than natural aggregate, to influence the performance of regeneration concrete.
Summary of the invention
In view of the deficienciess of the prior art, the purpose of the present invention one is to provide a kind of regeneration concrete, system can be improved
Compression strength, flexural strength and the drying shrinkage value of the concrete obtained；Improve agent on crack resistance of concrete folding, impervious, anti-corrosion, shock resistance and resistance to
The advantages of grinding performance.
Second object of the present invention is to provide a kind of production technology of regeneration concrete, with production technology letter
It is single, safe operation and advantage easy to implement.
To realize above-mentioned first purpose, the present invention provides the following technical scheme that a kind of regeneration concrete, the regeneration
Concrete is made of the raw material comprising following weight: 100~112 parts of coarse aggregate, 68~75 parts of fine aggregate, 27~33 parts of cement,
15~22 parts of mineral admixture, 5~10 parts of fiber, 3~8 parts of rubber grain, 13~19 parts of water and 0.6~1.0 part of additive；
The coarse aggregate includes modification regeneration coarse aggregate and common coarse aggregate, the modification regeneration coarse aggregate and common coarse aggregate
Weight ratio is (0.3~0.45): 1；
The modification regeneration coarse aggregate is using nano material and silica solution as modifying agent to the granule modified acquisition of waste and old concrete, institute
The weight for stating modifying agent accounts for 17wt%~26wt% of waste and old concrete particle；
The nano material includes at least one in nano silica, nano silica fume, nanometer calcium carbonate and nano-titanium dioxide
Kind；
The fine aggregate includes recycled fine aggregate and common fine aggregate, and the weight ratio of the recycled fine aggregate and common fine aggregate is
(0.2~0.3): 1；
The mineral admixture includes at least two in flyash, silicon ash, slag, phosphorous slag micropowder and agstone.
By using above-mentioned technical proposal, regeneration concrete prepared by the present invention includes coarse aggregate, fine aggregate, cement, mine
Polymer blends material, fiber, rubber grain, water and additive；Each component cooperates in regeneration concrete, and collective effect can be made
It can be pumped, and the solidifying native mixture of coagulation that slump is good, conserve intensity, anti-pressure ability and the dry receipts of concrete after molding
Contracting value resulting improvement.
In the present invention, coarse aggregate includes modification regeneration coarse aggregate and common coarse aggregate, the modification regeneration coarse aggregate with it is general
The weight ratio of logical coarse aggregate is (0.3~0.45): 1；Modification regeneration coarse aggregate is using nano material and silica solution as modifying agent pair
The granule modified acquisition of waste and old concrete, the weight of the modifying agent account for 17wt%~26wt% of waste and old concrete particle；It is described
Nano material includes at least one of nano silica, nano silica fume, nanometer calcium carbonate and nano-titanium dioxide；Further
Ground, the nano material are nanometer calcium carbonate；Still further, the nanometer calcium carbonate and silica solution be with weight ratio (2~
3): 1 ratio mixing.
By using above-mentioned technical proposal, modifying agent is the abbreviation of modified additive, all to improve regeneration slightly
The additive of the various performances of aggregate, can be referred to as modifying agent.Nano material refers at least one dimension in three dimensions
In nano-scale (0.1-100nm) or material composed of them as basic units, nano material has many special property
Matter, for example, bulk effect, skin effect and macro quanta tunnel effect etc., are known as 21 century most promising material.With receiving
Rice material and silica solution are modified waste and old concrete particle, by filling gap and micro-crack inside regenerated coarse aggregate
Improve its internal structure, to improve the intensity of regenerated coarse aggregate, reduce the water absorption rate and rate of water absorption of regenerated coarse aggregate, increases
The performance of strong recycled aggregate.And modified regenerated coarse aggregate can be such that the interfacial structure of cement and aggregate is optimized, and play and mention
High concrete intensity, the effect for enhancing substrate toughness.
Nano material includes in nano silica, nano silica fume, nanometer calcium carbonate and nano-titanium dioxide in the present invention
At least one, nano silica is a kind of inorganic chemical industry material, is commonly called as white carbon black, and nano silica appearance is amorphous
White powder, it is nontoxic, tasteless, pollution-free.Nano silica fume is crystal silicon particle of the diameter less than 5 nanometers, has purity is high, grain
Diameter is small, is evenly distributed, and surface area is big, high surface, the low feature of apparent density, and nontoxic, tasteless.Nanometer calcium carbonate is also known as
Calcium carbonate superfine powder is a kind of Novel super-thin solid powder material.Nano-titanium dioxide, also known as titanium dioxide, diameter 100 nanometers with
Under, product appearance is fluffy white powder, has anti-line, antibacterial and the performances such as anti-aging.With nano silica, nano-silicon
Regenerated coarse aggregate can be filled at least one of powder, nanometer calcium carbonate and nano-titanium dioxide and silica sol modified recycled aggregate
Internal gap and micro-crack improves its internal structure, has the function of toughened and reinforced, can reduce the water suction of regenerated coarse aggregate
Rate and rate of water absorption enhance the performance of recycled aggregate.And concrete strength, anti-aging and chemical resistance can be improved to a certain extent
Energy.
Coarse aggregate includes modification regeneration coarse aggregate and common coarse aggregate, the weight of modification regeneration coarse aggregate and common coarse aggregate
Than for (0.3~0.45): 1；It protecting positive concrete mix there is good slump, concrete to have good intensity, resisting
In the case where pressure energy power and dried contract, the dosage of common coarse aggregate is saved as far as possible, is conducive to economize on resources, and protects environment.
In the present invention, common coarse aggregate is cobble or rubble etc..
Further, average grain diameter 5mm~31.5mm of the coarse aggregate, coarse aggregate is by 5mm~16mm continuous size fraction grade
With being made into 5mm~31.5mm continuous size fraction gradation with 16mm~31.5mm simple grain grade grading composition.
By using above-mentioned technical proposal, coarse aggregate is by 5mm~16mm continuous size fraction gradation and 16mm~31.5mm simple grain
Grade grading composition is made into, and the two be combined with each other, and obtained concrete mix has good workability, is not likely to produce isolation,
It is suitably vibrated, can get closely knit high-strength concrete.
In the present invention, fine aggregate includes recycled fine aggregate and common fine aggregate, the recycled fine aggregate and common fine aggregate
Weight ratio be (0.2~0.3): 1；Further the recycled fine aggregate includes the fine aggregate generated when waste and old concrete is broken
With precipitating fine aggregate in water when the washing of broken concrete, the average grain diameter of the recycled fine aggregate be 0.25mm~
0.5mm。
By using above-mentioned technical proposal, recycled fine aggregate includes the fine aggregate generated when waste and old concrete is broken and is crushed
Precipitating fine aggregate in water when rear concrete washing in the present invention, when waste and old concrete is crushed, can obtain regenerating thick bone
Material and recycled fine aggregate, improve the utilization rate of waste and old concrete, and resource recycling is conducive to economize on resources, protects environment.Again
Raw fine aggregate and common fine aggregate are (0.2~0.3) by weight: fine aggregate is made in 1 ratio, is protecting positive concrete mixing
In the case that object has good intensity, anti-pressure ability and dried contract with good slump, concrete, useless thin collection is realized
The dosage of common fine aggregate is saved in the recycling of material as far as possible, is conducive to economize on resources, and protects environment.In the present invention, commonly
Fine aggregate is the sand sold on the market, can be natural sand, is also possible to artificial sand, and the grain shape and gradation of artificial sand are all can be with
It adjusts and improved, it is convenient and practical.
In the present invention, mineral admixture includes at least two in flyash, silicon ash, slag, phosphorous slag micropowder and agstone
Kind；Further, the mineral admixture includes flyash and agstone；The weight ratio of the flyash and agstone is
10:(5~7).
By using above-mentioned technical proposal, mineral admixture refers to that capable of improving of being added in concrete batching newly mixes coagulation
Soil nature can be a kind of supplementary cementitious material with the inorganic mineral fine powder of maturing.Flyash is from the flue gas after coal combustion
The fine ash that middle catching is come, is the primary solids waste of coal-burning power plant's discharge, and in the present invention, flyash is with II grade, fineness 40-50 μ
M is tailed over no more than 30%.Silicon ash refers generally to SILICA FUME or cohesion silicon ash, is ferroalloy in smelting duriron and industrial silicon (gold
Belong to silicon) when, the very strong SiO of a large amount of volatility is produced in ore-smelting electric furnace2With Si gas, gas discharge after with air rapid oxidation
Condensation precipitates, it is the by-product during big industry is smelted.Slag is byproduct during blast furnace ironmaking, is being smelted iron
Cheng Zhong, iron oxide are reduced into metallic iron at high temperature, and the impurity such as silica, aluminium oxide in iron ore and lime etc. react raw
At with silicate and alumino-silicate fusant as main component in shot-like particle loose at quality, porous by quenching, as
Blast-furnace cinder, abbreviation slag, miberal powder, the present invention in, slag select S95 grades.Agstone is will to wear into after limestone crushing
Fine powder, fineness are 40-50 μm.Phosphorous slag micropowder is obtained with silicate melting as main component when being with electric furnace process manufacture-yellow phosphorus
Object is in resulting powder body material levigate after quenching granulating.
At least two mineral in flyash, silicon ash, slag, phosphorous slag micropowder and agstone are added in regeneration concrete
Admixture, the energy intergranular hole of filling concrete, while gelinite is generated with hydrated product, improve concrete microstructure, drop
The low porosity of cement slurry improves aggregate Interface cohesive force, improves concrete anti-compression, anti-folding, impervious, anti-corrosion, anti-impact
It hits and wear-resisting property.A large amount of cement and fine aggregate have been saved, water consumption is reduced, improve concrete mix and easy
Property, enhance the pumpability of concrete, reduce creeping for concrete, reduce the heat of hydration and thermal energy expansion, improves concrete impervious
Ability increases the modified of concrete.Weight ratio is 10:(5~7) flyash and agstone, cooperate, it is mutually complementary
It fills, the workability of concrete mix can be improved；Regeneration concrete mixture obtained pump, and slump is good；
Concrete product intensity obtained, anti-pressure ability, dried contract resulting improvement；Reduce creeping for concrete；The reduction heat of hydration,
Thermal energy dilatancy；Improve concrete impervious ability.
Further, the fiber includes one of steel fibre, basalt fibre and polypropylene fibre or a variety of.
By using above-mentioned technical proposal, steel fibre refer to cut off finer wire method, cold-rolling strip steel shearing, steel ingot milling or
The fiber that draw ratio is 40~80 is made in molten steel rapid condensation method.Basalt fibre is the glass fibers drawn with natural basalt
Dimension is basalt building stones after 1450 DEG C~1500 DEG C meltings, by continuous made of platinum-rhodium alloy bushing high speed pulling
Fiber.Polypropylene fibre is synthetic fibers made of the isotactic polypropylene obtained using propylene polymerization is spinned as raw material.It is mixed in regeneration
One of steel fibre, basalt fibre and polypropylene fibre or a variety of is added in solidifying soil, can control original concrete crackle
Further development, to improve crack resistance, may make tension, bending resistance, impact strength and the elongation percentage of concrete and toughness to obtain
To improve.
In the present invention, 3~8 parts of rubber grain are added in regeneration concrete.
By using above-mentioned technical proposal, rubber grain mainly passes through various waste olds (including scrap rubber, sneakers
The waste olds such as bottom, leftover pieces, cable skin, rubber leftover pieces, car mat band, automobile tire) Raw material processing production.This
In invention, for the average grain diameter of rubber grain in 1~3mm, apparent density is 1240~1260kg/m3.Recycled aggregate is loose more
Hole, with the increase of recycled aggregate volume, the permeability of regeneration concrete is increasing, and mechanical property reduces, and rubber grain
It is added, permeability, toughness, splitting power resistance strength and the compression strength of regeneration concrete, the elasticity of regeneration concrete can be improved
Good trend is also presented in modulus.
Further, the additive is water-reducing agent.
By using above-mentioned technical proposal, concrete admixture is mixed during ready-mixed concrete, accounts for cement quality
5% is below, can significantly improve the chemical substance of concrete performance.In the present invention, additive selects water-reducing agent, and water-reducing agent can be from
It is commercially available on the market.Water-reducing agent is a kind of under conditions of maintaining concrete slump to be basically unchanged, and can be reduced mixing water
The concrete admixture of amount.Belong to anionic surfactant mostly, there is lignosulfonates, naphthalene sulphonate formaldehyde polymer
Deng.Water-reducing Admixtures To Cements particle has peptizaiton, can improve its workability, reduces unit consumption of water, improves concrete mix
Mobility；Or unit cement consumption is reduced, save cement.
To realize above-mentioned second purpose, the present invention provides the following technical scheme that a kind of regeneration concrete, the regeneration
The preparation process of concrete includes the following steps:
Detection: each raw material are detected by batch, are checked its certificate of quality, fineness, gradation and are detected the suitable of its production mix proportion
Ying Xing, underproof raw material are rejected；
Metering: each raw material are weighed by the data of match ratio；
Mixing: modification regeneration coarse aggregate being uniformly mixed with common coarse aggregate to obtain mixes coarse aggregate, by recycled fine aggregate and general
Logical fine aggregate is uniformly mixed, and obtains mixing fine aggregate, and mixing coarse aggregate is uniformly mixed to obtain mixing aggregate with mixing fine aggregate；
Stirring: the cement, mineral admixture, fiber, rubber grain and the additive that have weighed weight are added in mixing aggregate, mixed
It closes uniformly, obtains mixture, then add water in mixture and stir evenly, obtain regeneration concrete mixture；
Maintenance: casting regeneration concrete mixture, closely knit molding conserve 7~28d, obtain molding concrete.
By using above-mentioned technical proposal, when each raw material are detected by batch, cement, miberal powder check its certificate of quality；Powder
Coal ash checks its certificate of quality and fineness；Common coarse aggregate (rubble) and common fine aggregate (sand) estimate its gradation；Detect raw material
Production mix proportion adaptability (the predominantly adaptive change of water-containing rate, rate containing stone and cement and admixture)；It is underproof
Raw material are rejected, qualified just to receive.The quality for controlling raw material can prevent inferior or underproof raw material shadow to a certain extent
Ring the performance that regeneration concrete is.It weighs when metering in strict accordance with the cooperation of regeneration concrete, is conducive to regeneration concrete
Play optimum performance.First coarse aggregate is uniformly mixed when mixing, is then uniformly mixed fine aggregate, then by coarse aggregate and fine aggregate
It is uniformly mixed, in batches ordered mixing aggregate, convenient for being sufficiently mixed for aggregate, and mixing is relatively uniform, and it is mixed to be conducive to regeneration
The uniformity of solidifying soil property amount.When stirring, first dry raw material is stirred evenly, water is being added, is stirring evenly, renewable concrete
Mixture stirs more evenly.In the present invention, stirring is stirred using blender, and 50~100s of mixing time, normal concrete stirs
The time is mixed close to 50s, high-strength concrete mixing time is close to 100s.The preparation step of regeneration concrete is simple, mechanical stirring, behaviour
Facilitate, labour can be liberated, it is easy to implement.
Further, the modified coarse aggregate prepare it is as follows:
By waste and old concrete disintegrating, screening selects the particle that wherein average grain diameter is 5mm~31.5mm, is cleaned, obtained
Regenerated coarse aggregate；Nano material is uniformly mixed with silica solution, mixed liquor is made；By regenerated coarse aggregate and mixed liquor 60 DEG C~
50min~70min is stirred at 70 DEG C, it is dry, obtain modification regeneration coarse aggregate.
By using above-mentioned technical proposal, in preparation process, the partial size of strict control recycled aggregate, the time of stirring and temperature
Degree is conducive to the optimum performance for playing regenerated coarse aggregate.The step of preparing modification regeneration aggregate is simple, easy-to-operate, easily
In implementation, and and mass production.
In conclusion the invention has the following advantages:
One, the present invention using at least one of nano silica, nano silica fume, nanometer calcium carbonate and nano-titanium dioxide and
Gap of the silica solution inside modification regeneration aggregate, fillable regenerated coarse aggregate improves its internal structure with micro-crack, has
Toughened and reinforced effect can reduce the water absorption rate and rate of water absorption of regenerated coarse aggregate, enhance the performance of recycled aggregate；
Two, aggregate includes coarse aggregate and fine aggregate in the present invention, and coarse aggregate includes modification regeneration coarse aggregate and common coarse aggregate, carefully
Aggregate includes recycled fine aggregate and common fine aggregate, has good slump, coagulation what the positive concrete mix of guarantor had
In the case that soil has good intensity, anti-pressure ability and dried contract, realizes the maximum utilizationization of waste and old resource, be conducive to save
About resource protects environment；
Three, at least two mineral in flyash, silicon ash, slag, phosphorous slag micropowder and agstone are added in regeneration concrete
Admixture, the energy intergranular hole of filling concrete, while mineral admixture and hydrated product generate gelinite, improve concrete
Microstructure reduces the porosity of cement slurry, improves aggregate Interface cohesive force, improves concrete anti-compression, anti-folding, resists
Infiltration, anti-corrosion, shock resistance and wear-resisting property；
Four, one of steel fibre, basalt fibre and polypropylene fibre or a variety of are added in regeneration concrete, can control base
The further development of body concrete crackle, to improve crack resistance, may make the tension of concrete, bending resistance, impact strength and
Elongation percentage and toughness are improved；
Five, rubber grain is added in regeneration concrete, the permeability, toughness, splitting drag that can improve regeneration concrete are strong
Degree and compression strength.
Six, in the present invention, each component cooperates, and is complementary to one another, collective effect, can be made pumpable and slump is good
Regeneration concrete mixture, what the properties such as intensity, anti-pressure ability and the dried contract of regeneration concrete sample obtained obtained changes
It is kind.
Specific embodiment
Invention is further described in detail with reference to embodiments.
Preparation example
Preparation example one
Preparing for modified coarse aggregate is as follows:
By waste and old concrete disintegrating, screening is selected the particle that wherein average grain diameter is 16mm, (is generated when collecting crushed stone
Average grain diameter is the little particle one of 0.25mm, spare)；
The particle that average grain diameter is 16mm is cleaned and (collects the little particle two precipitated in water when cleaning, spare), sunning, directly
To not dripping, regenerated coarse aggregate is obtained；By average grain diameter be 16mm regenerated coarse aggregate, be made 5mm continuous size fraction gradation and
The regenerated coarse aggregate finished product of 16mm simple grain grade grading composition；5.67kg nano material is uniformly mixed with 2.83kg silica solution, is made
Obtain mixed liquor；50kg regenerated coarse aggregate finished product and mixed liquor are stirred into 50min at 60 DEG C, it is dry, obtain the thick bone of modification regeneration
Material.
Preparing for recycled fine aggregate is as follows:
Spare little particle one obtained when preparing modified coarse aggregate is cleaned, as much as possible the cement in removal little particle one
And dust, it dries, obtains fine aggregate one；Spare little particle two obtained when preparing modified coarse aggregate is cleaned, as far as possible
Ground removes the cement and dust in little particle two, dries, and is sieved, and filters out the little particle of average grain diameter 0.25mm as thin collection
Material two；Fine aggregate one and fine aggregate two are uniformly mixed, can be prepared by recycled fine aggregate.
Preparation example two
Preparing for modified coarse aggregate is as follows:
By waste and old concrete disintegrating, screening is selected the particle that wherein average grain diameter is 31.5mm, (is generated when collecting crushed stone
Average grain diameter be 0.35mm little particle one, it is spare)；
The particle that average grain diameter is 31.5mm is cleaned and (collects the little particle two precipitated in water when cleaning, spare), sunning,
Until not dripping, regenerated coarse aggregate is obtained；The regenerated coarse aggregate for being 31.5mm by average grain diameter, is made 16mm continuous size fraction gradation
With the regenerated coarse aggregate finished product of 31.5mm simple grain grade grading composition；8.57kg nano material is mixed with 3.43kg silica solution
It is even, mixed liquor is made；50kg regenerated coarse aggregate finished product and mixed liquor are stirred into 70min at 70 DEG C, it is dry, obtain modification regeneration
Coarse aggregate.
Preparing for recycled fine aggregate is as follows:
Spare little particle one obtained when preparing modified coarse aggregate is cleaned, as much as possible the cement in removal little particle one
And dust, it dries, obtains fine aggregate one；Spare little particle two obtained when preparing modified coarse aggregate is cleaned, as far as possible
Ground removes the cement and dust in little particle two, dries, and is sieved, and filters out the little particle of average grain diameter 0.35mm as thin collection
Material two；Fine aggregate one and fine aggregate two are uniformly mixed, can be prepared by recycled fine aggregate.
Preparation example three
Preparing for modified coarse aggregate is as follows:
By waste and old concrete disintegrating, screening is selected the particle that wherein average grain diameter is 19mm, (is generated when collecting crushed stone
Average grain diameter is the little particle one of 0.5mm, spare)；The particle that average grain diameter is 19mm is cleaned and (is collected in water when cleaning
The little particle two of precipitating, spare), sunning until not dripping, obtains regenerated coarse aggregate；By 7.5kg nano material and 2.5kg silicon
Colloidal sol is uniformly mixed, and mixed liquor is made；Regenerated coarse aggregate finished product and mixed liquor are stirred into 60min at 65 DEG C, it is dry, changed
Property regenerated coarse aggregate.
Preparing for recycled fine aggregate is as follows:
Spare little particle one obtained when preparing modified coarse aggregate is cleaned, as much as possible the cement in removal little particle one
And dust, it dries, obtains fine aggregate one；Spare little particle two obtained when preparing modified coarse aggregate is cleaned, as far as possible
Ground removes the cement and dust in little particle two, dries, and is sieved, filters out the little particle of average grain diameter 0.5mm as fine aggregate
Two；Fine aggregate one and fine aggregate two are uniformly mixed, can be prepared by recycled fine aggregate.
Preparation example four
Preparation example four and the difference of preparation example one are, replace nanometer calcium carbonate with nano silica in preparation example four, other
With preparation example one and be consistent.
Preparation example five
Preparation example five and the difference of preparation example one are, replace nano-sized carbon with nano silica fume and nano-titanium dioxide in preparation example five
Sour calcium, it is other with preparation example one and be consistent.
Preparation example six
Preparation example six and the difference of preparation example one are that the molten nanometer calcium carbonate and silicon being added in preparation example six is 5kg, other
With preparation example one and be consistent.
Preparation example seven
Preparation example the Seventh Five-Year Plan and the difference of preparation example one are that nanometer calcium carbonate and the silicon that addition is added in preparation example seven are molten respectively
9k and 1kg, it is other with preparation example one and be consistent.
Embodiment
Embodiment 1
A kind of preparation process of regeneration concrete includes the following steps:
Detection: each raw material are detected by batch: cement, agstone check its certificate of quality；Flyash checks its certificate of quality
And fineness；Common coarse aggregate and common fine aggregate estimate its gradation；(predominantly sand contains the production mix proportion adaptability of detection raw material
The adaptive change of water rate, rate containing stone and cement and admixture)；Underproof raw material are rejected, qualified just to receive.
Mixing: 28.57kg modification regeneration coarse aggregate obtained in preparation example three is mixed with the common coarse aggregate of 71.43kg
It is even to obtain mixing coarse aggregate, 11.33kg recycled fine aggregate and the common fine aggregate of 56.67kg are uniformly mixed, obtain mixing thin bone
Mixing coarse aggregate is uniformly mixed to obtain mixing aggregate with mixing fine aggregate by material；
Stirring: by 27kg cement, 10kg flyash, 5kg agstone, 5kg polyester fiber, 5kg rubber grain and 0.6kg slow setting
Agent is added in mixing aggregate, is uniformly mixed, and obtains mixture, then 13kg water is added in mixture and is stirred evenly, is regenerated
Concrete mix.
Maintenance: casting regeneration concrete mixture, closely knit molding conserve 7d, obtain molding concrete.
Embodiment 2
A kind of preparation process of regeneration concrete includes the following steps:
Detection: each raw material are detected by batch: cement, agstone check its certificate of quality；Flyash checks its certificate of quality
And fineness；Common coarse aggregate and common fine aggregate estimate its gradation；(predominantly sand contains the production mix proportion adaptability of detection raw material
The adaptive change of water rate, rate containing stone and cement and admixture)；Underproof raw material are rejected, qualified just to receive.
Mixing: 24.46kg modification regeneration coarse aggregate obtained in preparation example three is mixed with the common coarse aggregate of 81.54kg
It is even to obtain mixing coarse aggregate, 17.31kg recycled fine aggregate and the common fine aggregate of 57.69kg are uniformly mixed, obtain mixing thin bone
Mixing coarse aggregate is uniformly mixed to obtain mixing aggregate with mixing fine aggregate by material；
Stirring: by 30kg cement, 10kg flyash, 7kg agstone, 7kg steel fibre, 3kg rubber grain and 1.0kg diminishing
Agent is added in mixing aggregate, is uniformly mixed, and obtains mixture, then 19kg water is added in mixture and is stirred evenly, is regenerated
Concrete mix.
Maintenance: casting regeneration concrete mixture, closely knit molding conserve 28d, obtain molding concrete.
Embodiment 3
A kind of preparation process of regeneration concrete includes the following steps:
Detection: each raw material are detected by batch: cement, agstone check its certificate of quality；Flyash checks its certificate of quality
And fineness；Common coarse aggregate and common fine aggregate estimate its gradation；(predominantly sand contains the production mix proportion adaptability of detection raw material
The adaptive change of water rate, rate containing stone and cement and admixture)；Underproof raw material are rejected, qualified just to receive.
Mixing: 34.76kg modification regeneration coarse aggregate obtained in preparation example three is mixed with the common coarse aggregate of 77.24kg
It is even to obtain mixing coarse aggregate, 14.2kg recycled fine aggregate and the common fine aggregate of 56.8kg are uniformly mixed, mixing fine aggregate is obtained,
Mixing coarse aggregate is uniformly mixed to obtain mixing aggregate with mixing fine aggregate；
Stirring: by 33kg cement, 13.75kg flyash, 8.25kg agstone, 10kg steel fibre, 8kg rubber grain and
0.8kg water-reducing agent is added in mixing aggregate, is uniformly mixed, and obtains mixture, then 16kg water is added in mixture and is stirred evenly,
Obtain regeneration concrete mixture.
Maintenance: casting regeneration concrete mixture, closely knit molding conserve 14d, obtain molding concrete.
Embodiment 4
A kind of preparation process of regeneration concrete includes the following steps:
Detection: each raw material are detected by batch: cement, agstone check its certificate of quality；Flyash checks its certificate of quality
And fineness；Common coarse aggregate and common fine aggregate estimate its gradation；(predominantly sand contains the production mix proportion adaptability of detection raw material
The adaptive change of water rate, rate containing stone and cement and admixture)；Underproof raw material are rejected, qualified just to receive.
Mixing: 29.14kg modification regeneration coarse aggregate obtained in preparation example three is mixed with the common coarse aggregate of 72.86kg
It is even to obtain mixing coarse aggregate, 16.5kg recycled fine aggregate and the common fine aggregate of 55kg are uniformly mixed, mixing fine aggregate is obtained, it will
Mixing coarse aggregate is uniformly mixed to obtain mixing aggregate with mixing fine aggregate；
Stirring: by 31.4kg cement, 12.2kg flyash, 6.1kg agstone, 8kg steel fibre, 6kg rubber grain and
0.895kg water-reducing agent is added in mixing aggregate, is uniformly mixed, and obtains mixture, then stirring in 16kg water addition mixture is equal
It is even, obtain regeneration concrete mixture.
Maintenance: casting regeneration concrete mixture, closely knit molding conserve 28d, obtain molding concrete.
Embodiment 5
Embodiment 5 and the difference of embodiment 4 are, in embodiment 5, using modification regeneration coarse aggregate made from preparation example one,
It is consistent with embodiment 4.
Embodiment 6
Embodiment 6 and the difference of embodiment 4 are, in embodiment 6, using modification regeneration coarse aggregate made from preparation example two,
It is consistent with embodiment 4.
Embodiment 7
Embodiment 7 and the difference of embodiment 4 are, in embodiment 7, using modification regeneration coarse aggregate made from preparation example four,
It is consistent with embodiment 4.
Embodiment 8
Embodiment 8 and the difference of embodiment 4 are, in embodiment 8, using modification regeneration coarse aggregate made from preparation example five,
It is consistent with embodiment 4.
Embodiment 9
Embodiment 9 and the difference of embodiment 4 are, in embodiment 9, using modification regeneration coarse aggregate made from preparation example six,
It is consistent with embodiment 4.
Embodiment 10
Embodiment 10 and the difference of embodiment 4 are, in embodiment 10, using modification regeneration coarse aggregate made from preparation example seven,
It is other to be consistent with embodiment 4.
Embodiment 11
Embodiment 11 and the difference of embodiment 4 are, in embodiment 11, the additional amount of flyash is 9.15kg, agstone
Additional amount is 9.15kg, other to be consistent with embodiment 4.
Embodiment 12
Embodiment 12 and the difference of embodiment 4 are, in embodiment 12, the additional amount of flyash is 6.1kg, and agstone adds
Entering amount is 12.2kg, other to be consistent with embodiment 4.
Embodiment 13
Embodiment 13 and the difference of embodiment 4 are, in embodiment 13, the mineral admixture of addition is 10kg flyash and 10kg
Silicon ash, it is other to be consistent with embodiment 4.
Embodiment 14
Embodiment 14 and the difference of embodiment 4 are, in embodiment 14, the mineral admixture of addition is 10kg slag, 6kg phosphorus slag
Micro mist and 6kg agstone, it is other to be consistent with embodiment 4.
Embodiment 15
Embodiment 15 and the difference of embodiment 4 are, in embodiment 15, the mineral admixture of addition is 8kg flyash, 4kg silicon
Ash, 3kg slag, 3kg phosphorous slag micropowder and 2kg agstone, it is other to be consistent with embodiment 4.
Comparative example
Using embodiment 5 as reference group
Comparative example 1
The difference of comparative example 1 and implementation 5 is in comparative example 1 without being handled again with modifying agent (nanometer calcium carbonate and silica solution)
Raw aggregate, it is other to be consistent with embodiment 5.
Comparative example 2
The difference of comparative example 2 and implementation 5 is to be added without in comparative example 2 mineral admixture (flyash and agstone), other
It is consistent with embodiment 5.
Comparative example 3
The difference of comparative example 3 and implementation 5 is that 3 Minerals admixture of comparative example only mixes flyash, other to protect with embodiment 5
It holds consistent.
Comparative example 4
Comparative example 4 and implement 5 difference and be that 4 Minerals admixture of comparative example only mixes agstone, it is other with embodiment 5
It is consistent.
Comparative example 5
The difference of comparative example 5 and implementation 5 is in comparative example 5 that fiber is not added, other to be consistent with embodiment 5.
Comparative example 6
The difference of comparative example 6 and implementation 5 is in comparative example 6 that rubber grain is not added, other to keep one with embodiment 5
It causes.
Comparative example 7
Comparative example 7 and implement 5 difference and be in comparative example 7 using common coarse aggregate and common carefully femur material, it is other with
Embodiment 5 is consistent.
Performance detection test
1, common coarse aggregate, regenerated coarse aggregate and modification regeneration coarse aggregate (preparation example one to system are detected according to standard JGJ53-92
Standby example seven) basic performance, testing result is as shown in table 1.
The basic performance of the various coarse aggregates of table 1 detects table
| Sample | Superficial density/(kg.m-3) | Water absorption rate/% | Crush values % |
| Common coarse aggregate | 2688 | 5.23 | 7.8 |
| Regenerated coarse aggregate | 1780 | 9.1 | 20.3 |
| Modification regeneration coarse aggregate (preparation example one) | 2460 | 5.75 | 6.8 |
| Modification regeneration coarse aggregate (preparation example two) | 2450 | 5.69 | 6.8 |
| Modification regeneration coarse aggregate (preparation example three) | 2580 | 5.4 | 7.2 |
| Modification regeneration coarse aggregate (preparation example four) | 2455 | 5.62 | 6.6 |
| Modification regeneration coarse aggregate (preparation example five) | 2485 | 5.6 | 6.6 |
| Modification regeneration coarse aggregate (preparation example six) | 2460 | 5.66 | 6.4 |
| Modification regeneration coarse aggregate (preparation example seven) | 2455 | 5.5 | 6.5 |
As it can be seen from table 1 recycled aggregate, compared with common coarse aggregate, the superficial density of recycled aggregate is relatively low, water absorption rate and
Crush values are with regard to big；It is molten at least one of nano silica, nano silica fume, nanometer calcium carbonate and nano-mineral spike and silicon
Glue increases as the modifying agent superficial density for obtaining modification regeneration coarse aggregate granule modified to waste and old concrete, water absorption rate and crushing
Value reduces, and the basic performance of modified regenerated coarse aggregate and common coarse aggregate performance are close.
2, by regeneration concrete obtained in embodiment 1~15 and comparative example 1~7 in (20 ± 2) DEG C relative humidity
It is conserved in 95% or more SHBY-40B standard curing box, according to " common mixed according to standard GB/T/T50080-2016
Solidifying soil mixture method for testing performance standard " detect regeneration concrete obtained in embodiment 1~15 and comparative example 1~7
Basic mechanical performance, testing result are as shown in table 2.
Compression strength: sample dimensions are the cube of 150mm*150mm*150mm；
Flexural strength: sample dimensions are the prism of 150mm*150mm*550mm.
The basic mechanical performance record sheet of 2 concrete of table
| Sample | Compression strength/MPa | Flexural strength/MPa | Drying shrinkage value/(mm/m) |
| Embodiment 1 | 52.3 | 5.55 | 0.22 |
| Embodiment 2 | 53.5 | 6.42 | 0.17 |
| Embodiment 3 | 53.6 | 6.51 | 0.17 |
| Embodiment 4 | 53.9 | 7.02 | 0.15 |
| Embodiment 5 | 53.4 | 6.61 | 0.18 |
| Embodiment 6 | 53.5 | 6.60 | 0.17 |
| Embodiment 7 | 52.9 | 6.01 | 0.19 |
| Embodiment 8 | 53.0 | 6.05 | 0.20 |
| Embodiment 9 | 52.1 | 5.54 | 0.23 |
| Embodiment 10 | 52.1 | 5.62 | 0.24 |
| Embodiment 11 | 51.2 | 4.88 | 0.28 |
| Embodiment 12 | 51.4 | 4.82 | 0.27 |
| Embodiment 13 | 53.1 | 6.0 | 0.21 |
| Embodiment 14 | 52.8 | 6.12 | 0.21 |
| Embodiment 15 | 52.8 | 6.09 | 0.19 |
| Comparative example 1 | 36.2 | 3.25 | 0.35 |
| Comparative example 2 | 44.2 | 5.01 | 0.27 |
| Comparative example 3 | 52.3 | 5.56 | 0.21 |
| Comparative example 4 | 52.2 | 5.58 | 0.22 |
| Comparative example 5 | 50.2 | 4.88 | 0.3 |
| Comparative example 6 | 50.6 | 4.62 | 0.32 |
| Comparative example 7 | 54.4 | 7.21 | 0.12 |
From table 2 it can be seen that comparative example 4 is compared with comparative example 1 and embodiment 1~15, it can be deduced that, with normal concrete phase
Than, the compression strength and flexural strength of the concrete for the coarse aggregate that use is not modified are poor, and it is dry to shrink and creep larger, it mixes
The basic performance for coagulating soil is poor；It can be seen that from embodiment 1~15 and the data of comparative example 1~7, according to the formula system in the present invention
The compression strength and flexural strength of the regeneration concrete obtained illustrate that regeneration concrete performance of the invention obtains close to normal concrete
To improvement；By the data of embodiment 1~15 and comparative example 1~7 it is found that there is mutual cooperation in the present invention between each raw material component,
Mutually synergistic effect, so as to improve the property of regeneration concrete.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
1. a kind of regeneration concrete, which is characterized in that the regeneration concrete is made of the raw material comprising following weight: coarse aggregate
100~112 parts, 68~75 parts of fine aggregate, 27~33 parts of cement, 15~22 parts of mineral admixture, 5~10 parts of fiber, rubber
3~8 parts of grain, 13~19 parts of water and 0.6~1.0 part of additive；
The coarse aggregate includes modification regeneration coarse aggregate and common coarse aggregate, the modification regeneration coarse aggregate and common coarse aggregate
Weight ratio is (0.3~0.45): 1；
The modification regeneration coarse aggregate is using nano material and silica solution as modifying agent to the granule modified acquisition of waste and old concrete, institute
The weight for stating modifying agent accounts for 17wt%~26wt% of waste and old concrete particle；
The nano material includes at least one in nano silica, nano silica fume, nanometer calcium carbonate and nano-titanium dioxide
Kind；
The fine aggregate includes recycled fine aggregate and common fine aggregate, and the weight ratio of the recycled fine aggregate and common fine aggregate is
(0.2~0.3): 1；
The mineral admixture includes at least two in flyash, silicon ash, slag, phosphorous slag micropowder and agstone.
2. a kind of regeneration concrete according to claim 1, which is characterized in that the nano material is nanometer calcium carbonate.
3. a kind of regeneration concrete according to claim 2, which is characterized in that the nanometer calcium carbonate and silica solution are with weight
Amount is than being (2~3): 1 ratio mixing.
4. a kind of regeneration concrete according to claim 1, which is characterized in that the average grain diameter 5mm of the coarse aggregate~
31.5mm, coarse aggregate by 5mm~16mm continuous size fraction gradation and 16mm~31.5mm simple grain grade grading composition be made into 5mm~
31.5mm continuous size fraction gradation.
5. a kind of regeneration concrete according to claim 1, which is characterized in that the recycled fine aggregate includes waste and old coagulation
The fine aggregate of precipitating in water when the fine aggregate and broken concrete that soil generates when broken are washed, the recycled fine aggregate
Average grain diameter is 0.25mm~0.5mm.
6. a kind of regeneration concrete according to claim 1, which is characterized in that the mineral admixture include flyash and
Agstone；The weight ratio of the flyash and agstone is 10:(5~7).
7. a kind of regeneration concrete according to claim 1, which is characterized in that the fiber includes steel fibre, basalt
One of fiber and polypropylene fibre are a variety of.
8. a kind of regeneration concrete according to claim 1, which is characterized in that the additive is water-reducing agent.
9. described in any item a kind of regeneration concretes according to claim 1~8, which is characterized in that the regeneration concrete
Preparation process includes the following steps:
Detection: each raw material are detected by batch, are checked its certificate of quality, fineness, gradation and are detected the suitable of its production mix proportion
Ying Xing, underproof raw material are rejected；
Metering: each raw material are weighed by the data of match ratio；
Mixing: modification regeneration coarse aggregate being uniformly mixed with common coarse aggregate to obtain mixes coarse aggregate, by recycled fine aggregate and general
Logical fine aggregate is uniformly mixed, and obtains mixing fine aggregate, and mixing coarse aggregate is uniformly mixed to obtain mixing aggregate with mixing fine aggregate；
Stirring: the cement, mineral admixture, fiber, rubber grain and the additive that have weighed weight are added in mixing aggregate, mixed
It closes uniformly, obtains mixture, then add water in mixture and stir evenly, obtain regeneration concrete mixture；
Maintenance: casting regeneration concrete mixture, closely knit molding conserve 7~28d, obtain molding concrete.
10. a kind of regeneration concrete according to claim 9, which is characterized in that preparing for the modified coarse aggregate is as follows:
By waste and old concrete disintegrating, screening selects the particle that wherein average grain diameter is 5mm~31.5mm, is cleaned, done
It is dry, obtain regenerated coarse aggregate；Nano material is uniformly mixed with silica solution, mixed liquor is made；By regenerated coarse aggregate and mixed liquor
50min~70min is stirred at 60 DEG C~70 DEG C, it is dry, obtain modification regeneration coarse aggregate.
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Application publication date: 20190809 |