CN108751842B - A kind of high-strength regeneration concrete and preparation method thereof adding waste and old cable - Google Patents
A kind of high-strength regeneration concrete and preparation method thereof adding waste and old cable Download PDFInfo
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- CN108751842B CN108751842B CN201810581623.0A CN201810581623A CN108751842B CN 108751842 B CN108751842 B CN 108751842B CN 201810581623 A CN201810581623 A CN 201810581623A CN 108751842 B CN108751842 B CN 108751842B
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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
- 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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
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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
- 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 high-strength regeneration concrete for adding waste and old cable, every cubic metre of regeneration concrete is made of the raw material of following proportion: 168~180kg of water, cement 300kg~330kg, 63~70kg of super finely ground slag, 63~70kg of flyash, 860~900kg of fine aggregate, 560~600kg of regenerated coarse aggregate, 560~600kg of natural coarse aggregate, 4.3~9.4kg of water-reducing agent, 85.2~141g of air entraining agent, waste and old 4.3~7.1kg of cable.The preparation method comprises the following steps: the 50% of originally water inventory, regenerated coarse aggregate, natural coarse aggregate, fine aggregate and waste and old cable are successively first poured into concrete mixer；Super finely ground slag, flyash are poured into blender；Cement is added；Air entraining agent and water-reducing agent are dissolved in remaining 50% tap water, blender is poured into；The fresh concrete being stirred is unloaded on the steel plate, is stirred to get regeneration concrete.
Description
Technical field
The invention belongs to high-strength regeneration concrete preparation technical fields, and in particular to it is a kind of add waste and old cable it is high-strength again
Growing concrete；The invention further relates to the preparation methods of the high-strength regeneration concrete of the waste and old cable of the admixture.
Background technique
With the quickening of Chinese Urbanization development process, the solid waste discharges amount such as building waste gradually increases.However,
Most of building waste is without any processing, and the periphery for being transported to countryside or city is simply buried and outdoor heap
Product.Such processing mode not only occupies a large amount of land resource, but also can pollute the water ring around building waste laydown area
Border and air.In addition, increasing with China human mortality, building trade greatly increases the demand of concrete, therefore
Natural sand stone aggregate demand can be increased too fast.Past exploitation sandstone aggregate can cause serious pollution to environment, arrive
Child landslide, riverbed are changed its course and depletion of natural resources.Therefore recycled aggregate is broken for using regeneration concrete circulation, it can
Effectively to alleviate above-mentioned brought problem, turns waste into wealth, there are good economic and social benefits.
The corner angle for the Aggregate of recycled concrete (referred to as: recycled aggregate) that waste and old concrete obtains after broken are excessive, and
Recycled aggregate is spicule mostly, and can generate minute crack inside aggregate during recycled aggregate is broken, while again
Raw aggregate surface generally understand adhesion a part of old sand slurry so that recycled aggregate compared with natural aggregate, have crush index it is big,
The features such as water absorption rate is high, porosity is big, apparent density is low.These characteristics of recycled aggregate cause the intensity of regeneration concrete compared with
It is low, durability is poor, therefore at present regeneration concrete be mostly used for the non-structural non-load-bearing concrete field such as backfill, roadbed.By
Utilization rate to the limitation of application field, regeneration concrete is very low.The mechanical property of regeneration concrete lowly becomes restriction again
The bottleneck of growing concrete application.
With the development of China's urban construction, a large amount of removal engineering etc. will cause the generation of a large amount of waste and old cable.One
As in the case of, waste and old cable can be mainly divided into following three classes: waste and old cable refer to eliminate scrap it is unavailable；It is useless
Old cable is through the flowing calcination damage of excessive current voltage；It causes in production and processing because of fault not to be available.These three types of electricity
Cable is usually referred to as waste and old cable by people or scraps cable.Manual layer stripping is mainly used for waste and old cable at present, by
In this method using manually for waste and old cable carry out peeling, therefore higher cost and efficiency it is lower, often in recycling
It is costly in the process；In addition incineration method is used, this method mainly makes the plastic skin of scrap wire cable burn, then returns using burning
Copper therein is received, but the smoke pollution generated is extremely serious, while the surface severe oxidation of copper wire during the burning process, reduces
Metal recovery rate, therefore the utilization rate of this method is lower.Mainly thin copper wire, therefore its Li Yongwei concrete inside waste and old cable
Plate and raw material, the trouble that waste and old cable recycles can be reduced, and environment and atmosphere pollution can be reduced.
In conclusion the admixture of regenerated coarse aggregate will affect the mechanical property and endurance quality of concrete.Due to rubber
Grain can change the pore structure in regeneration concrete, thus to the durability generation advantageous effect of regeneration concrete, but meeting
The intensity of regeneration concrete is influenced indirectly；But the bonding degree of concrete integral structure, Ke Yiti can be improved in waste and old cable
The cohesive strength of high concrete can be improved the compression strength of concrete and split to improve the stability of concrete structure
Split tensile strength.Under the action of these two aspects, available compression strength and the stronger regeneration concrete of durability are compound
Material.
Summary of the invention
The object of the present invention is to provide a kind of high-strength regeneration concretes for adding waste and old cable, can obtain a kind of high intensity
Regeneration concrete, increase the endurance quality of regeneration concrete.
It is a further object to provide a kind of preparation methods of high-strength regeneration concrete for adding waste and old cable.
The technical scheme adopted by the invention is that a kind of high-strength regeneration concrete for adding waste and old cable, every cubic metre
High-strength regeneration concrete is made of the raw material of following proportion:
168~180kg of water, 300~330kg of cement, 63~70kg of super finely ground slag, 63~70kg of flyash, fine aggregate 860
~900kg, 560~600kg of regenerated coarse aggregate, 560~600kg of natural coarse aggregate, 4.3~9.4kg of water-reducing agent, air entraining agent 85.2
~141g, waste and old 4.3~7.1kg of cable.
The features of the present invention also characterized in that
The length of waste and old cable is 2cm~15cm.
The partial size of regenerated coarse aggregate is 5mm~20mm.
Fine aggregate is river sand, fineness modulus 2.8.
Another technical solution of the present invention is: a kind of preparation for the high-strength regeneration concrete adding waste and old cable
Method, comprising the following steps:
Step 1, it stocks up according to the proportion of following raw material,
Every cubic metre of high-strength regeneration concrete is made of the raw material of following proportion:
168~180kg of water, 300~330kg of cement, 63~70kg of super finely ground slag, 63~70kg of flyash, fine aggregate 860
~900kg, 560~600kg of regenerated coarse aggregate, 560~600kg of natural coarse aggregate, 4.3~9.4kg of water-reducing agent, air entraining agent 85.2
~141g, waste and old 4.3~7.1kg of cable；
Step 2, by the 50% of originally water inventory, regenerated coarse aggregate, natural coarse aggregate, fine aggregate and waste and old cable successively
Concrete mixer is poured into, 15s~20s is stirred, so that regenerated coarse aggregate surface wettability；
Super finely ground slag, flyash are poured into blender by step 3, stir 15s~20s；
Cement is added in step 4, stirs 30s；
Step 5 is dissolved in air entraining agent and water-reducing agent in remaining 50% tap water, pours into blender, is subsequently agitated for
60s closes stirring electromechanical source；
Step 6 unloads the fresh concrete being stirred on the steel plate, then is carried out manually stirring 30s~60s with spade, i.e.,
Obtain the regeneration concrete for adding waste and old iron wire.
The features of the present invention also characterized in that
In step 1, the length of waste and old cable is 2cm~15cm.
In step 1, the partial size of regenerated coarse aggregate is 5mm~20mm.
Fine aggregate is river sand, fineness modulus 2.8.
The invention has the advantages that
(1) increase the endurance quality of regeneration concrete.Due to being copper wire inside waste and old cable, corrosion will not be generated and made
At the destruction of internal structure.In addition, the globality that will cause concrete inner structure increases due to the reinforcement effect inside copper wire
By force, therefore the mechanical property of concrete can be improved, to improve the durability performance of regeneration concrete indirectly.
(2) waste and old cable and regenerated coarse aggregate have been added in mix-design in the present invention, can be effectively reduced
The burning and landfill disposal of building and cable, have obtained good recycling for solid waste, have good
Society well, environment, economic benefit.
(3) since waste and old Exterior cable encloses one layer of plastic insulation skin, it is certain that incorporation indirectly is equivalent to during mix
The plastic optical fibre of amount substantially increases the energy that regeneration concrete resists extraneous deformation to increase the toughness of regeneration concrete
Power.
(4) due to regenerated coarse aggregate, inside generates more minute crack in shattering process and porosity is larger,
Mechanical property and endurance quality for regeneration concrete generate certain influence.But regeneration coagulation can be improved in waste and old cable
The integrally-built bonding degree of soil, increases the compaction rate of regeneration concrete, thus improve the compression strength of regeneration concrete with
And tensile splitting strength.
Specific embodiment
The present invention is described in detail With reference to embodiment.
The present invention provides a kind of high-strength regeneration concrete for adding waste and old cable, every cubic metre of high-strength regeneration concretes
It is made of the raw material of following proportion:
168~180kg of water, 300~330kg of cement, 63~70kg of super finely ground slag, 63~70kg of flyash, fine aggregate 860
~900kg, 560~600kg of regenerated coarse aggregate, 560~600kg of natural coarse aggregate, 4.3~9.4kg of water-reducing agent, air entraining agent 85.2
~141g, waste and old 4.3~7.1kg of cable.
The length of waste and old cable is 2cm~15cm.
The partial size of regenerated coarse aggregate is 5mm~20mm.
Fine aggregate is river sand, fineness modulus 2.8.
The present invention also provides the preparation methods of the high-strength regeneration concrete of the waste and old cable of above-mentioned admixture, including following step
It is rapid:
Step 1, it stocks up according to the proportion of following raw material,
Every cubic metre of high-strength regeneration concrete is made of the raw material of following proportion:
168~180kg of water, 300~330kg of cement, 63~70kg of super finely ground slag, 63~70kg of flyash, fine aggregate 860
~900kg, 560~600kg of regenerated coarse aggregate, 560~600kg of natural coarse aggregate, 4.3~9.4kg of water-reducing agent, air entraining agent 85.2
~141g, waste and old 4.3~7.1kg of cable；
Step 2, by the 50% of originally water inventory, regenerated coarse aggregate, natural coarse aggregate, fine aggregate and waste and old cable successively
Concrete mixer is poured into, 15s~20s is stirred, so that regenerated coarse aggregate surface wettability；
Super finely ground slag, flyash are poured into blender by step 3, stir 15s~20s；
Cement is added in step 4, stirs 30s；
Step 5 is dissolved in air entraining agent and water-reducing agent in remaining 50% tap water, pours into blender, is subsequently agitated for
60s closes stirring electromechanical source；
Step 6 unloads the fresh concrete being stirred on the steel plate, then is carried out manually stirring 30s~60s with spade, i.e.,
Obtain the regeneration concrete for adding waste and old iron wire.
In step 1, the length of waste and old cable is 2cm~15cm.
In step 1, the partial size of regenerated coarse aggregate is 5mm~20mm.
Fine aggregate is river sand, fineness modulus 2.8.
Embodiment 1
Waste and old concrete is crushed, it is made to be broken into regenerated coarse aggregate, guarantee the partial size of regenerated coarse aggregate 5~
20mm；Regenerated coarse aggregate is sieved, the regenerated coarse aggregate for removing more corner angle, strip and triangular shape is rejected, protects as far as possible
It is approximate circle for demonstrate,proving regenerated coarse aggregate.Waste and old cable cutting length is 2cm.
Step 1, it stocks up according to the proportion of following raw material,
Every cubic metre of high-strength regeneration concrete is made of the raw material of following proportion:
Water 170kg, cement 320kg, super finely ground slag 65kg, flyash 65kg, fine aggregate 880kg, regenerated coarse aggregate
580kg, natural coarse aggregate 580kg, water-reducing agent 5kg, air entraining agent 100g, waste and old cable 5kg；
Step 2, by the 50% of originally water inventory, regenerated coarse aggregate, natural coarse aggregate, fine aggregate and waste and old cable successively
Concrete mixer is poured into, 20s is stirred, so that regenerated coarse aggregate surface wettability；
Super finely ground slag, flyash are poured into blender by step 3, stir 20s；
Cement is added in step 4, stirs 30s；
Step 5 is dissolved in air entraining agent and water-reducing agent in remaining 50% tap water, pours into blender, is subsequently agitated for
60s closes stirring electromechanical source；
Step 6 unloads the fresh concrete being stirred on the steel plate, then is carried out manually stirring 60s with spade, that is, obtains
Add the regeneration concrete of waste and old iron wire.
Embodiment 2
Waste and old concrete is crushed, it is made to be broken into regenerated coarse aggregate, guarantee the partial size of regenerated coarse aggregate 5~
20mm；Regenerated coarse aggregate is sieved, the regenerated coarse aggregate for removing more corner angle, strip and triangular shape is rejected, protects as far as possible
It is approximate circle for demonstrate,proving regenerated coarse aggregate.Waste and old cable cutting length is 5cm.
Step 1, it stocks up according to the proportion of following raw material,
Every cubic metre of high-strength regeneration concrete is made of the raw material of following proportion:
Water 170kg, cement 320kg, super finely ground slag 65kg, flyash 65kg, fine aggregate 880kg, regenerated coarse aggregate
580kg, natural coarse aggregate 580kg, water-reducing agent 5kg, air entraining agent 100g, waste and old cable 5kg；
Step 2 successively falls the 50% of originally water inventory, regenerated coarse aggregate, natural coarse aggregate, river sand and waste and old cable
Enter concrete mixer, 20s is stirred, so that regenerated coarse aggregate surface wettability；
Super finely ground slag, flyash are poured into blender by step 3, stir 20s；
Cement is added in step 4, stirs 30s；
Step 5 is dissolved in air entraining agent and water-reducing agent in remaining 50% tap water, pours into blender, is subsequently agitated for
60s closes stirring electromechanical source；
Step 6 unloads the fresh concrete being stirred on the steel plate, then is carried out manually stirring 60s with spade, that is, obtains
Add the regeneration concrete of waste and old iron wire.
Embodiment 3
Waste and old concrete is crushed, it is made to be broken into regenerated coarse aggregate, guarantee the partial size of regenerated coarse aggregate 5~
20mm；Regenerated coarse aggregate is sieved, the regenerated coarse aggregate for removing more corner angle, strip and triangular shape is rejected, protects as far as possible
It is approximate circle for demonstrate,proving regenerated coarse aggregate.Waste and old cable cutting length is 10cm.
Step 1, it stocks up according to the proportion of following raw material,
Every cubic metre of high-strength regeneration concrete is made of the raw material of following proportion:
Water 170kg, cement 320kg, super finely ground slag 65kg, flyash 65kg, fine aggregate 880kg, regenerated coarse aggregate
580kg, natural coarse aggregate 580kg, water-reducing agent 5kg, air entraining agent 100g, waste and old cable 5kg；
Step 2, by the 50% of originally water inventory, regenerated coarse aggregate, natural coarse aggregate, fine aggregate and waste and old cable successively
Concrete mixer is poured into, 20s is stirred, so that regenerated coarse aggregate surface wettability；
Super finely ground slag, flyash are poured into blender by step 3, stir 20s；
Cement is added in step 4, stirs 30s；
Step 5 is dissolved in air entraining agent and water-reducing agent in remaining 50% tap water, pours into blender, is subsequently agitated for
60s closes stirring electromechanical source；
Step 6 unloads the fresh concrete being stirred on the steel plate, then is carried out manually stirring 60s with spade, that is, obtains
Add the regeneration concrete of waste and old iron wire.
Embodiment 4
Waste and old concrete is crushed, it is made to be broken into regenerated coarse aggregate, guarantee the partial size of regenerated coarse aggregate 5~
20mm；Regenerated coarse aggregate is sieved, the regenerated coarse aggregate for removing more corner angle, strip and triangular shape is rejected, protects as far as possible
It is approximate circle for demonstrate,proving regenerated coarse aggregate.Waste and old cable cutting length is 15cm.
Step 1, it stocks up according to the proportion of following raw material,
Every cubic metre of high-strength regeneration concrete is made of the raw material of following proportion:
Water 170kg, cement 320kg, super finely ground slag 65kg, flyash 65kg, fine aggregate 880kg, regenerated coarse aggregate
580kg, natural coarse aggregate 580kg, water-reducing agent 5kg, air entraining agent 100g, waste and old cable 5kg；
Step 2, by the 50% of originally water inventory, regenerated coarse aggregate, natural coarse aggregate, fine aggregate and waste and old cable successively
Concrete mixer is poured into, 20s is stirred, so that regenerated coarse aggregate surface wettability；
Super finely ground slag, flyash are poured into blender by step 3, stir 20s；
Cement is added in step 4, stirs 30s；
Step 5 is dissolved in air entraining agent and water-reducing agent in remaining 50% tap water, pours into blender, is subsequently agitated for
60s closes stirring electromechanical source；
Step 6 unloads the fresh concrete being stirred on the steel plate, then is carried out manually stirring 60s with spade, that is, obtains
Add the regeneration concrete of waste and old iron wire.
Embodiment 5
Waste and old concrete is crushed, it is made to be broken into regenerated coarse aggregate, guarantee the partial size of regenerated coarse aggregate 5~
20mm；Regenerated coarse aggregate is sieved, the regenerated coarse aggregate for removing more corner angle, strip and triangular shape is rejected, protects as far as possible
It is approximate circle for demonstrate,proving regenerated coarse aggregate.Waste and old cable cutting length is 2cm.
Step 1, it stocks up according to the proportion of following raw material,
Every cubic metre of high-strength regeneration concrete is made of the raw material of following proportion:
Water 168kg, cement 300kg, super finely ground slag 63kg, flyash 63kg, fine aggregate 860kg, regenerated coarse aggregate
560kg, natural coarse aggregate 560kg, water-reducing agent 4.3kg, air entraining agent 85.2g, waste and old cable 4.3kg；
Step 2, by the 50% of originally water inventory, regenerated coarse aggregate, natural coarse aggregate, fine aggregate and waste and old cable successively
Concrete mixer is poured into, 18s is stirred, so that regenerated coarse aggregate surface wettability；
Super finely ground slag, flyash are poured into blender by step 3, stir 18s；
Cement is added in step 4, stirs 30s；
Step 5 is dissolved in air entraining agent and water-reducing agent in remaining 50% tap water, pours into blender, is subsequently agitated for
60s closes stirring electromechanical source；
Step 6 unloads the fresh concrete being stirred on the steel plate, then is carried out manually stirring 50s with spade, that is, obtains
Add the regeneration concrete of waste and old iron wire.
Embodiment 6
Waste and old concrete is crushed, it is made to be broken into regenerated coarse aggregate, guarantee the partial size of regenerated coarse aggregate 5~
20mm；Regenerated coarse aggregate is sieved, the regenerated coarse aggregate for removing more corner angle, strip and triangular shape is rejected, protects as far as possible
It is approximate circle for demonstrate,proving regenerated coarse aggregate.Waste and old cable cutting length is 2cm.
Step 1, it stocks up according to the proportion of following raw material,
Every cubic metre of high-strength regeneration concrete is made of the raw material of following proportion:
Water 180kg, cement 330kg, super finely ground slag 70kg, flyash 70kg, fine aggregate 900kg, regenerated coarse aggregate
600kg, natural coarse aggregate 600kg, water-reducing agent 9.4kg, air entraining agent 141g, waste and old cable 7.1kg；
Step 2, by the 50% of originally water inventory, regenerated coarse aggregate, natural coarse aggregate, fine aggregate and waste and old cable successively
Concrete mixer is poured into, 15s is stirred, so that regenerated coarse aggregate surface wettability；
Super finely ground slag, flyash are poured into blender by step 3, stir 15s；
Cement is added in step 4, stirs 30s；
Step 5 is dissolved in air entraining agent and water-reducing agent in remaining 50% tap water, pours into blender, is subsequently agitated for
60s closes stirring electromechanical source；
Step 6 unloads the fresh concrete being stirred on the steel plate, then is carried out manually stirring 30s with spade, that is, obtains
Add the regeneration concrete of waste and old iron wire.
Comparative example
Waste and old concrete is crushed, it is made to be broken into regenerated coarse aggregate, guarantees the partial size of waste and old coarse aggregate 5
~20mm.
Step 1, it stocks up according to the proportion of following raw material,
Every cubic metre of high-strength regeneration concrete is made of the raw material of following proportion:
Water 170kg, cement 320kg, super finely ground slag 65kg, flyash 65kg, fine aggregate 880kg, regenerated coarse aggregate
580kg, natural coarse aggregate 580kg, water-reducing agent 5kg, air entraining agent 100g；
Step 2, by the 50% of originally water inventory, regenerated coarse aggregate, natural coarse aggregate, fine aggregate and waste and old cable successively
Concrete mixer is poured into, 20s is stirred, so that regenerated coarse aggregate surface wettability；
Super finely ground slag, flyash are poured into blender by step 3, stir 20s；
Cement is added in step 4, stirs 30s；
Step 5 is dissolved in air entraining agent and water-reducing agent in remaining 50% tap water, pours into blender, is subsequently agitated for
60s closes stirring electromechanical source；
Step 6 unloads the fresh concrete being stirred on the steel plate, then is carried out manually stirring 60s with spade, that is, obtains
Add the regeneration concrete of waste and old iron wire.
Water in embodiment 1-6 and comparative example uses tap water；Cement is the P.O52.5 ordinary silicon of Mitsubishi cement plant production
Acid salt cement；Flyash uses the high-calcium type flyash of Qingdao four directions power plant production, is F grades of flyash；Super finely ground slag uses
The P800 super finely ground slag of Jinan iron company production；After regenerated coarse aggregate uses parent concrete to be crushed for C50 waste and old concrete
Partial size is 5mm-20mm；Fine aggregate uses river sand, fineness modulus 2.8；High efficiency water reducing agent uses the limited public affairs of Shanghai rich fruit industry
Take charge of the QS-8020 polycarboxylate water-reducer (high water reduction type) of production；The limited public affairs of the efficient entitled Shanghai Mace chemical industry responsibility of air entraining agent
Take charge of the super dry powder activity melamine high-efficiency water-reducing agent of SM-F of production；The waste and old electricity that waste and old cable uses salvage station to collect
Cable.
It is stirred, is newly mixed mixed using SJD60 type list horizontal shaft forced type concrete mixer in embodiment 1-6 and comparative example
After solidifying soil prepares, a certain amount of fresh ready-mixed concrete is taken respectively, according to specification " mechanical property test side on common coagulation
Method standard " requirement, test the slump of fresh concrete；Concrete is added to steel die trial, and brings up to shake table progress
It vibrates, the 30s that vibrates is until concrete surface bleeding.It places at room temperature and carries out demoulding afterwards for 24 hours, then by concrete sample
It is put into standard curing box, setting curing box temperature is 20 DEG C, humidity 98%.Test specimen is taken out after maintenance 28d to be tested.Point
It is other that label is carried out to different test specimen groups, measure the mechanical property and anti-freezing property of concrete.
The mechanical performance of concrete and anti-freezing property test result in above-mentioned 6 embodiment are indicated in table 1.Comparative example in table,
For the regeneration concrete for not adding waste and old cable.It is 5mm, 10mm and 15mm that embodiment 2~4 adds waste and old cable length respectively；
It is 2mm that embodiment 1,5~6, which adds waste and old cable length,.
1 above-described embodiment 1-6 of table and mechanical performance of concrete and anti-freezing property test result in comparative example
From table 1 it follows that in regeneration concrete after the waste and old cable of admixture different length, the power of concrete
Different degrees of variation can be occurred by learning performance and endurance quality.Compared with the mechanical performance of concrete of comparative example, Examples 1 to 6
In compression strength and tensile splitting strength increase, it can be found that added in embodiment 2 waste and old cable length be 5cm
When regeneration concrete mechanical property increase it is maximum；For regeneration concrete frost resistance, compared with comparative example, embodiment 1
The frost resistance of regeneration concrete in~6 increases, and changing rule is similar to mechanical property.It can illustrate, waste and old cable
Admixture for regeneration concrete mechanical property and durability play the role of raising.
Advantages of the present invention are as follows:
(1) increase the endurance quality of regeneration concrete.Due to being copper wire inside waste and old cable, it will not generate and get rusty
Inside concrete generates the destruction that chemical reaction causes internal structure.In addition, will cause mixed due to the reinforcement effect inside copper wire
The globality enhancing of solidifying soil internal structure, therefore the mechanical property of concrete can be improved, to improve regeneration concrete indirectly
Durability performance.
(2) waste and old cable and regenerated coarse aggregate have been added in mix-design in the present invention, can be effectively reduced
The burning and landfill disposal of building and cable, have obtained good recycling for solid waste, have good
Society well, environment, economic benefit.
(3) since waste and old Exterior cable encloses one layer of plastic insulation skin, it is certain that incorporation indirectly is equivalent to during mix
The plastic optical fibre of amount substantially increases the energy that regeneration concrete resists extraneous deformation to increase the toughness of regeneration concrete
Power.
(4) due to regenerated coarse aggregate, inside generates more minute crack in shattering process and porosity is larger,
Mechanical property and endurance quality for regeneration concrete generate certain influence.But regeneration coagulation can be improved in waste and old cable
The integrally-built bonding degree of soil, increases the compaction rate of regeneration concrete, thus improve the compression strength of regeneration concrete with
And tensile splitting strength.
Claims (4)
1. a kind of high-strength regeneration concrete for adding waste and old cable, which is characterized in that every cubic metre of high-strength regeneration concrete by
The raw material composition matched below:
168~180kg of water, 300~330kg of cement, 63~70kg of super finely ground slag, 63~70kg of flyash, fine aggregate 860~
900kg, 560~600kg of regenerated coarse aggregate, 560~600kg of natural coarse aggregate, 4.3~9.4kg of water-reducing agent, air entraining agent 85.2~
141g, waste and old 4.3~7.1kg of cable；
The length of the waste and old cable is 2cm~15cm；
The partial size of the regenerated coarse aggregate is 5mm~20mm.
2. a kind of high-strength regeneration concrete for adding waste and old cable according to claim 1, which is characterized in that the thin bone
Material is river sand, fineness modulus 2.8.
3. a kind of preparation method for the high-strength regeneration concrete for adding waste and old cable, which comprises the following steps:
Step 1, it stocks up according to the proportion of following raw material,
Every cubic metre of high-strength regeneration concrete is made of the raw material of following proportion:
168~180kg of water, 300~330kg of cement, 63~70kg of super finely ground slag, 63~70kg of flyash, fine aggregate 860~
900kg, 560~600kg of regenerated coarse aggregate, 560~600kg of natural coarse aggregate, 4.3~9.4kg of water-reducing agent, air entraining agent 85.2~
141g, waste and old 4.3~7.1kg of cable；
Step 2 successively pours into the 50% of originally water inventory, regenerated coarse aggregate, natural coarse aggregate, fine aggregate and waste and old cable
Concrete mixer stirs 15s~20s, so that regenerated coarse aggregate surface wettability；
Super finely ground slag, flyash are poured into blender by step 3, stir 15s~20s；
Cement is added in step 4, stirs 30s；
Step 5 is dissolved in air entraining agent and water-reducing agent in remaining 50% tap water, pours into blender, is subsequently agitated for 60s, closes
Close stirring electromechanical source；
Step 6 unloads the fresh concrete being stirred on the steel plate, then is carried out manually stirring 30s~60s with spade, that is, obtains
The regeneration concrete of the waste and old iron wire of admixture；
In step 1, the length of the waste and old cable is 2cm~15cm；
In step 1, the partial size of the regenerated coarse aggregate is 5mm~20mm.
4. a kind of preparation method of high-strength regeneration concrete for adding waste and old cable according to claim 3, feature exist
In the fine aggregate is river sand, fineness modulus 2.8.
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