CN110194627A - A kind of regeneration concrete and preparation method thereof - Google Patents

A kind of regeneration concrete and preparation method thereof Download PDF

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Publication number
CN110194627A
CN110194627A CN201910557240.4A CN201910557240A CN110194627A CN 110194627 A CN110194627 A CN 110194627A CN 201910557240 A CN201910557240 A CN 201910557240A CN 110194627 A CN110194627 A CN 110194627A
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China
Prior art keywords
parts
regeneration concrete
coarse aggregate
concrete
regeneration
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CN201910557240.4A
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Chinese (zh)
Inventor
尹阳
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Anhui Guanghong Garden Construction Co Ltd
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Anhui Guanghong Garden Construction Co Ltd
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Priority to CN201910557240.4A priority Critical patent/CN110194627A/en
Publication of CN110194627A publication Critical patent/CN110194627A/en
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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
    • 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
    • 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
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The present invention relates to a kind of regeneration concretes and preparation method thereof, by weight include following components: 60-70 parts of regenerated coarse aggregate, 18-22 parts of natural coarse aggregate, 15-20 parts of portland slag cement, 15-20 parts of fine sand, 10-15 parts of activated water, 8-12 parts of flyash, 5-8 parts of modified polypropylene fiber, 4-6 parts of adhesive, 3-5 parts of silicon dioxide powder, 3-5 parts of manganese dioxide powder and 3-5 parts of water-reducing agent;Preparation method makes regenerated coarse aggregate the following steps are included: S1. is crushed discarded concrete;S2. it is spare to filter out the regenerated coarse aggregate that partial size is 10-15mm;S3. the surface of regenerated coarse aggregate is cleaned, removal remains in the cement mortar on its surface;S4. it mixes: raw material is mixed in order, regeneration concrete slurry is made after mixing evenly;S5. regeneration concrete slurry poured, vibrated, be allowed to form.The present invention has the effect of improving recycled concrete strength performance.

Description

A kind of regeneration concrete and preparation method thereof
Technical field
The present invention relates to the technical fields of construction material, more particularly, to a kind of regeneration concrete and preparation method thereof.
Background technique
With commerical ready-mixed concrete China flourish, Concrete Industry oneself so become the pillar row of the field of building materials Industry.However concrete, as maximum artificial engineering material, once building or structures disintegrate, it, which also can correspondingly become, is built " main force " of building refuse.At present in China, the discharge amount of annual concrete debris is just more than 100,000,000 tons, these discarded coagulations Soil cannot be recycled preferably mostly, while need a large amount of place also to handle these building wastes.At the same time, water Pillar industry of bricklayer's's industry as building material industry is also undisputed " rich and influential family " in terms of resource, energy consumption, this and 21 generation The weary status of discipline shortage of resources, energy plaque is runed counter to and is gone.Therefore, Developing Circulation Economy is preserved the ecological environment, and is relied on Technological progress realizes that the sustainable development of concrete industry is very necessary.
Currently, notification number is a kind of regeneration concrete and preparation method thereof of CN107500667A, composition point includes water Mud, water, fine aggregate and coarse aggregate, match ratio is 1: 0.53: 1.84: 3.42 between component;The coarse aggregate includes common thick bone Material and regenerated coarse aggregate, wherein regenerated coarse aggregate is 40% in the accounting of coarse aggregate;Cement used in test specimen is normal silicate water Mud, regenerated coarse aggregate are concrete waste material;Preparation method is the following steps are included: (1) prepares regenerated coarse aggregate;(2) thin bone is weighed Material, regenerated coarse aggregate and common coarse aggregate are put into blender and are stirred;(3) to fine aggregate, regenerated coarse aggregate and common thick After mixing evenly, cement is added for aggregate, and is stirred;(4) to fine aggregate, regenerated coarse aggregate, common coarse aggregate and cement After mixing evenly, it adds water and stirs in the mixture, mixing time is 9~12min, and regenerated concrete mixture is made;It (5) will step Suddenly regenerated concrete mixture made of (4) is poured, is vibrated.
Prior art among the above has the following deficiencies: that regenerated coarse aggregate carries out broken place during the preparation process Reason, can generate some microcracks inside regenerated coarse aggregate during broken, during preparing regeneration concrete, regeneration Surface phenomenon of losing water can occur for concrete, and surface dehydration can aggravate the cracking degree of microcrack, lead to the intensity of regeneration concrete Reduced performance.
Summary of the invention
The object of the present invention is to provide a kind of regeneration concretes and preparation method thereof, have and improve recycled concrete strength The effect of performance.
Above-mentioned technical purpose of the invention has the technical scheme that a kind of regeneration concrete, by weight Measure part include following components: 60-70 part of regenerated coarse aggregate, 18-22 parts of natural coarse aggregate, 15-20 parts of portland slag cement, carefully 15-20 parts of sand, 10-15 parts of activated water, 8-12 parts of flyash, 5-8 parts of modified polypropylene fiber, 4-6 parts of adhesive, silica 3-5 parts of powder, 3-5 parts of manganese dioxide powder and 3-5 parts of water-reducing agent.
By using above-mentioned technical proposal, the addition of modified polypropylene fiber for reduce the length of microcrack, width and Quantity reduces a possibility that generating through crack, plays the role of blocking capillary crack in regeneration concrete, makes to regenerate coagulation Soil strength character be improved significantly;There is modified polypropylene fiber moisture, chloride ion, air in reduction regeneration concrete to turn The effect of shifting rate;Under high-temperature situation, since the Vicat softening point of modified polypropylene fiber is soft lower than the dimension card of regeneration concrete Change point, modified polypropylene fiber can first soften sintering, so that duct is formed in regeneration concrete, by high temperature in regeneration concrete The moisture of vaporization is discharged along duct, thus prevent moisture from vaporizing to form internal high pressure and regeneration concrete is made to burst, so as to improve The fire resistance period and fire resistance rating of regeneration concrete;The specific surface area of flyash is small and there are gradations, adds flyash for subtracting Frictional resistance when mixing between few particle plays water-reduction to reduce the water consumption of concrete with this;Silicon dioxide powder and two Manganese powder stabilized soil pavement with higher is aoxidized, and its granule size is reasonably distributed, and in mixed process, is easy to be filled in again In the microcrack of raw coarse aggregate, so as to improve the compactness and intensity of regeneration concrete.
The present invention is further arranged to: the modified polypropylene fiber is polypropylene fibre-glass fibre compound.
By using above-mentioned technical proposal, polypropylene fibre intensity is high, elasticity is good, and wear resistant corrosion resistant, still, due to it Fusing point is lower, causes it poor to the stability of photo-thermal, and glass fibre fusing point is higher, and photo and thermal stability is strong, uses glass fibers Dimension is modified polypropylene fibre, so as to improve the photo and thermal stability of polypropylene fibre, to delay the old of regeneration concrete Change speed;Due to glass fibre mechanical strength equally with higher, glass fibre is compounded with polypropylene fibre, be conducive into One step improves the intensity of polypropylene fibre, to improve the strength character of regeneration concrete.
The present invention is further arranged to: the polypropylene fibre-glass fibre compound is carried out argon plasma surface It comes into operation after processing.
By using above-mentioned technical proposal, argon gas is a kind of inert gas, using argon gas to polypropylene fibre-glass fibre Compound is surface-treated, and since argon plasma release UV photon has enough energy, opens polyacrylic C-C with this Key and c h bond change polyacrylic structure and a large amount of plasma are entered inside it, to increase polyacrylic table Face activity, so as to improve polypropylene fibre-glass fibre compound to the Adhesion property of other components, to reduce microcrack production Raw quantity, while the microcrack that filling is completely also easy to produce, so as to improve the strength character of regeneration concrete.
The present invention is further arranged to: described adhesive is isoprene.
By using above-mentioned technical proposal, isoprene is the main component for preparing rubber, selects isoprene as viscous On the one hand mixture is to have good viscosity and mobility due to itself, on the other hand, after isoprene curing molding, tool There is certain elasticity, so as to improve the elasticity modulus of regeneration concrete, so that its cracking resistance in the production process is improved, from And improve its strength character.
The present invention is further arranged to: the natural coarse aggregate is that mass ratio is 1:(2-3) cobble and rubble mixture.
By using above-mentioned technical proposal, cobble corner angle are less and surface is smooth, and voidage is smaller with surface area, and mixing is mixed Cement consumption is less when solidifying soil, to reduce the intensity that water consumption improves regeneration concrete, but the bonding of cobble and cement slurry Power is lower;Rubble corner angle are more and rough surface, and voidage is larger with surface area, and cement consumption is more when mixing concrete, but It is stronger with the cohesive force of cement slurry, therefore, using reasonable proportion, be conducive to while improving recycled concrete strength performance Reduce production cost.
The present invention is further arranged to: the water-reducing agent is sulfamate system, fatty acid series or poly carboxylic acid series water reducer One of or it is a variety of.
By using above-mentioned technical proposal, sulfamate system, fatty acid series or poly carboxylic acid series water reducer are adsorbed in regeneration Concrete particle surface makes particle show electrical property, mutually exclusive due to band identical charges between particle, to make to regenerate coagulation Soil particle is discharged extra moisture between particle by dispersion and generates water-reduction;On the other hand, since sulfamate is added After system, fatty acid series or poly carboxylic acid series water reducer, regeneration concrete particle surface forms absorption film, influences the water of regeneration concrete Change speed, keep the growth of regeneration concrete stone crystal more perfect, to reduce the capillary gap of moisture evaporation, keeps regeneration mixed Solidifying soil internal networking structure is more fine and close, so as to improve the hardness and compact structure of regeneration concrete.
The present invention is further arranged to: a kind of preparation method of regeneration concrete, specifically includes the following steps:
S1. it is crushed: discarded concrete is crushed, make regenerated coarse aggregate;
S2. it screens: rejecting needle-shaped, flake waste, it is spare to filter out the regenerated coarse aggregate that partial size is 10-15mm;
S3. it cleans: the surface of regenerated coarse aggregate is cleaned, removal remains in the cement mortar on its surface;
S4. it mixes: first stirring evenly regenerated coarse aggregate, natural coarse aggregate, fine sand;Then portland slag cement, powder is added Coal ash, modified polypropylene fiber, binder stir evenly;Add activated water, silicon dioxide powder, manganese dioxide powder, water-reducing agent Continue to stir, regeneration concrete slurry is made after mixing evenly;
S5. it forms: regeneration concrete slurry being poured, is vibrated, is allowed to form.
By using above-mentioned technical proposal, the partial size of regenerated coarse aggregate is bigger, and specific surface area is smaller, and water consumption is smaller, The strength character of regeneration concrete is higher, and still, the excessive regenerated coarse aggregate of partial size, internal defects are more, particles sink speed Degree is faster, it is easy to cause to be unevenly distributed in regeneration concrete, reduces the strength character of regeneration concrete instead, therefore, When screening regenerated coarse aggregate, by size controlling in 10-15mm, the strength character of regeneration concrete is ensured with this;It is thick due to regenerating Aggregate surface one layer of cement mortar easy to attach, the cement mortar of attachment easily influence the adhesion of regenerated coarse aggregate and other components Can, therefore cleaning is set, to remove the cement mortar on regeneration concrete surface.
In conclusion advantageous effects of the invention are as follows:
1. the addition of modified polypropylene fiber reduces for reducing length, width and the quantity of microcrack and generates through crack Possibility plays the role of blocking capillary crack in regeneration concrete, changes the strength character of regeneration concrete obviously It is kind;
2. silicon dioxide powder and manganese dioxide powder stabilized soil pavement with higher, and its granule size is reasonably distributed, mixed It during conjunction, is easy to be filled in the microcrack of regenerated coarse aggregate, so as to improve the compactness and intensity of regeneration concrete;
3. argon plasma is surface-treated for improving polypropylene fibre-glass fibre compound Adhesion property, to reduce The quantity that microcrack generates, while the microcrack that filling is completely also easy to produce, so as to improve the strength character of regeneration concrete.
Detailed description of the invention
Fig. 1 is the production technological process of the present embodiment.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment 1 is a kind of regeneration concrete disclosed by the invention and preparation method thereof, and regeneration concrete wraps by weight Include following components:
Cobble-rubble mixture mass ratio is 1:2.5;Polypropylene fibre-glass fibre compound is through argon plasma surface It comes into operation after processing;
The preparation method of regeneration concrete specifically includes the following steps:
S1. it is crushed: discarded concrete is crushed, make regenerated coarse aggregate;
S2. it screens: rejecting needle-shaped, flake waste, it is spare to filter out the regenerated coarse aggregate that partial size is 12.5mm;
S3. it cleans: the surface of regenerated coarse aggregate is cleaned, removal remains in the cement mortar on its surface;
S4. it mixes: first stirring evenly regenerated coarse aggregate, cobble-rubble mixture, fine sand;Then slag silicate salt water is added Mud, flyash, polypropylene fibre-glass fibre compound, isoprene stir evenly;Add activated water, silicon dioxide powder, Manganese dioxide powder, sulfamate based water reducer continue to stir, and regeneration concrete slurry is made after mixing evenly;S5. it forms: right Regeneration concrete slurry is poured, is vibrated, and is allowed to form.
Embodiment 2 is a kind of regeneration concrete disclosed by the invention and preparation method thereof, and regeneration concrete wraps by weight Include following components:
Cobble-rubble mixture mass ratio is 1:2.5;Polypropylene fibre-glass fibre compound is through argon plasma surface It comes into operation after processing;
The preparation method is the same as that of Example 1 for regeneration concrete.
Embodiment 3 is a kind of regeneration concrete disclosed by the invention and preparation method thereof, and regeneration concrete wraps by weight Include following components:
Cobble-rubble mixture mass ratio is 1:2.5;Polypropylene fibre-glass fibre compound is through argon plasma surface It comes into operation after processing;
The preparation method is the same as that of Example 1 for regeneration concrete.
Embodiment 4 is a kind of regeneration concrete disclosed by the invention and preparation method thereof, and regeneration concrete wraps by weight Include following components:
Cobble-rubble mixture mass ratio is 1:2.5;
The preparation method is the same as that of Example 1 for regeneration concrete.
Embodiment 5 is a kind of regeneration concrete disclosed by the invention and preparation method thereof, and regeneration concrete wraps by weight Include following components:
Cobble-rubble mixture mass ratio is 1:2;Polypropylene fibre-glass fibre compound through argon plasma surface at It comes into operation after reason;
The preparation method is the same as that of Example 1 for regeneration concrete.
Embodiment 6 is a kind of regeneration concrete disclosed by the invention and preparation method thereof, and regeneration concrete wraps by weight Include following components:
Cobble-rubble mixture mass ratio is 1:3;Polypropylene fibre-glass fibre compound through argon plasma surface at It comes into operation after reason;
The preparation method is the same as that of Example 1 for regeneration concrete.
Comparative example 1 is a kind of regeneration concrete disclosed by the invention and preparation method thereof, and regeneration concrete wraps by weight Include following components:
Cobble-rubble mixture mass ratio is 1:1.5;Polypropylene fibre-glass fibre compound is through argon plasma surface It comes into operation after processing;
The preparation method is the same as that of Example 1 for regeneration concrete.
Comparative example 2 is a kind of regeneration concrete disclosed by the invention and preparation method thereof, and regeneration concrete wraps by weight Include following components:
Cobble-rubble mixture mass ratio is 1:3.5;Polypropylene fibre-glass fibre compound is through argon plasma surface It comes into operation after processing;
The preparation method is the same as that of Example 1 for regeneration concrete.
Comparative example 3 is a kind of regeneration concrete disclosed by the invention and preparation method thereof, and regeneration concrete wraps by weight Include following components:
Cobble-rubble mixture mass ratio is 1:2.5;Polypropylene fibre comes into operation after argon plasma is surface-treated;
The preparation method is the same as that of Example 1 for regeneration concrete.
Comparative example 4 is a kind of regeneration concrete disclosed by the invention and preparation method thereof, and regeneration concrete wraps by weight Include following components:
Cobble-rubble mixture mass ratio is 1:2.5;Polypropylene fibre-glass fibre compound direct plunges into use;
The preparation method is the same as that of Example 1 for regeneration concrete.
Comparative example 5 is a kind of regeneration concrete disclosed by the invention and preparation method thereof, and regeneration concrete wraps by weight Include following components:
Cobble-rubble mixture mass ratio is 1:2.5;Polypropylene fibre direct plunges into use;
The preparation method is the same as that of Example 1 for regeneration concrete.
Embodiment 1-6 and comparative example the 1-5 regeneration concrete prepared are sampled, and to the strength character of sample And resistance to ag(e)ing can be carried out detection, detection data record is as shown in the table;
Strength character detection: uniform tension is applied to sample, the axis of the namely regenerated concrete of average tensile stress when sample broke Heart tensile strength;
Ageing-resistant performance detection: sample is placed in ageing oven, and carries out ultraviolet light cover 30d, records every group of sample The ageing rate of product.
Tensile strength/Mpa Ageing rate/%
Embodiment 1 72.4 12.7
Embodiment 2 60.3 18.6
Embodiment 3 64.6 16.8
Embodiment 4 62.8 17.3
Embodiment 5 66.3 14.7
Embodiment 6 64.7 16.3
Comparative example 1 57.3 20.6
Comparative example 2 54.9 20.4
Comparative example 3 66.2 35.4
Comparative example 4 54.8 24.6
Comparative example 5 52.7 40.1
According to the tensile strength of sample in embodiment 1-4 and the data of ageing rate it is found that changing regenerated coarse aggregate, ovum Parts by weight of the stone-between rubble mixture, portland slag cement and fine sand, can produce the strength character of regeneration concrete It is raw to influence, choose the regenerated coarse aggregate of proper ratio, cobble-rubble mixture, portland slag cement and fine sand is conducive to Improve the strength character of regeneration concrete;And the height of the tensile strength of regeneration concrete is for its ageing rate that there are certain shadows It rings, but influences unobvious;
According to embodiment 1, the data of the tensile strength of 5-6 and comparative example 1-2 it is found that the mass ratio of cobble and rubble is to regeneration Concrete tensile strength tool has a certain impact, when cobble too high levels or it is too low when, the strength character of regeneration concrete is equal Decline;The cohesive force of cobble too high levels, cobble and cement slurry is lower, causes the caking property inside regeneration concrete lower, shadow The intensity of regeneration concrete is rung;Cobble content is too low, and stone contents are excessively high, and the voidage between material and surface area are larger, Lead to the strength reduction of regeneration concrete;Therefore, the rubble for choosing proper ratio is mixed with cobble, is conducive to improve regeneration The intensity of concrete;
According to the data of the tensile strength and ageing rate of embodiment 1 and comparative example 3-6 it is found that using glass fibre to poly- third Alkene fiber is modified, and improves the strength character of regeneration concrete to a certain extent, but its bigger advantage is to improve The anti-aging property of regeneration concrete;Polypropylene fibre-glass fibre is handled using argon plasma, is conducive to increase poly- third The surface-active of alkene fiber, to improve its cohesive force, so as to improve the intensity of regeneration concrete, therefore the sample of comparative example 3 Tensile strength is greater than the sample tensile strength of comparative example 4 and comparative example 5.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it It is interior.

Claims (7)

1. a kind of regeneration concrete includes following components: 60-70 parts of regenerated coarse aggregate, natural coarse aggregate 18-22 by weight Part, 15-20 parts of portland slag cement, 15-20 parts of fine sand, 10-15 parts of activated water, 8-12 parts of flyash, modified polypropene are fine 5-8 parts of dimension, 4-6 parts of adhesive, 3-5 parts of silicon dioxide powder, 3-5 parts of manganese dioxide powder and 3-5 parts of water-reducing agent.
2. a kind of regeneration concrete according to claim 1, it is characterised in that: the modified polypropylene fiber is polypropylene Fibre-Glass fibre compound.
3. a kind of regeneration concrete according to claim 2, it is characterised in that: by the polypropylene fibre-glass fibre Compound comes into operation after carrying out argon plasma surface treatment.
4. a kind of regeneration concrete according to claim 1, it is characterised in that: described adhesive is isoprene.
5. a kind of regeneration concrete according to claim 1, it is characterised in that: it is 1 that the natural coarse aggregate, which is mass ratio: The cobble and rubble mixture of (2-3).
6. a kind of regeneration concrete according to claim 1, it is characterised in that: the water-reducing agent be sulfamate system, One of fatty acid series or polycarboxylic-acid are a variety of.
7. a kind of preparation method of regeneration concrete, specifically includes the following steps:
S1. it is crushed: discarded concrete is crushed, make regenerated coarse aggregate;
S2. it screens: rejecting needle-shaped, flake waste, it is spare to filter out the regenerated coarse aggregate that partial size is 10-15mm;
S3. it cleans: the surface of regenerated coarse aggregate is cleaned, removal remains in the cement mortar on its surface;
S4. it mixes: first stirring evenly regenerated coarse aggregate, natural coarse aggregate, fine sand;Then portland slag cement, powder is added Coal ash, modified polypropylene fiber, binder stir evenly;Add activated water, silicon dioxide powder, manganese dioxide powder, water-reducing agent Continue to stir, regeneration concrete slurry is made after mixing evenly;
S5. it forms: regeneration concrete slurry being poured, is vibrated, is allowed to form.
CN201910557240.4A 2019-06-25 2019-06-25 A kind of regeneration concrete and preparation method thereof Pending CN110194627A (en)

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