CN109970405A - A kind of concrete and preparation method thereof - Google Patents
A kind of concrete and preparation method thereof Download PDFInfo
- Publication number
- CN109970405A CN109970405A CN201910381600.XA CN201910381600A CN109970405A CN 109970405 A CN109970405 A CN 109970405A CN 201910381600 A CN201910381600 A CN 201910381600A CN 109970405 A CN109970405 A CN 109970405A
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- Prior art keywords
- parts
- concrete
- regeneration concrete
- regeneration
- water
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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
- 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
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Abstract
The invention discloses a kind of concrete, in every cubic metre of dosage, according to parts by weight, raw material includes 400-420 parts of cement；100-120 parts of super finely ground slag；30-40 parts of flyash；10-15 parts of water-reducing agent；1000-1050 parts of coarse aggregate；400-450 parts of fine aggregate；200-250 parts of regeneration concrete；150-200 parts of water.Moisture content, the water absorption rate of regeneration concrete are generally all higher than the regenerated coarse aggregate that do not strengthen, and absorption rate is very big.The reason of causing this phenomenon is the rough surface because regenerated coarse aggregate grain corner is more, includes a considerable amount of hardening cement mortars in component, internal to generate a large amount of microcrack toward contact along with Behavior of Hardened Cement Paste hole itself is bigger, and in rupture process.The present invention has the advantages that can still have excellent intensity in the case where mixing regeneration concrete.
Description
Technical field
The present invention relates to building engineering fields, more specifically, it relates to a kind of concrete and preparation method thereof.
Background technique
Concrete, abbreviation concrete are to be added by gel rubber material, granular aggregat (also referred to as aggregate), water and when necessary
Additive and admixture configure by a certain percentage, through uniform stirring, closely knit molding, and a kind of artificial stone material made of maintenance hardening,
It is widely used in civil engineering.
Regeneration concrete refers to discarded concrete block after broken, cleaning, classification, is compounded by a certain percentage with grade
It closes, partly or entirely replaces the natural aggregates such as sandstone, add cement, water etc. and be configured to novel concrete.Regeneration concrete is answered
With being of great significance in environmental protection.
But the intensity of regeneration concrete is much smaller than the intensity of natural aggregate, so that being difficult to obtain high-intensitive mix
Solidifying soil, causes its application field relatively limited, has much room for improvement.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of concrete, can be regenerated in addition
In the case where concrete, has excellent intensity.
To achieve the above object, the present invention provides the following technical scheme that
A kind of concrete, in every cubic metre of dosage, according to parts by weight, raw material includes following components,
By using above-mentioned technical proposal, moisture content, the water absorption rate of regeneration concrete are generally all higher than the regeneration that do not strengthen
Coarse aggregate, and absorption rate is very big.The reason of causing this phenomenon is the rough surface because regenerated coarse aggregate grain corner is more,
It include a considerable amount of hardening cement mortars in component, along with Behavior of Hardened Cement Paste hole itself is bigger, and in rupture process,
It is internal to generate a large amount of microcrack toward contact.
By the configuration of above-mentioned adding proportion, super finely ground slag can directly fill the microcrack on regeneration concrete, surpass simultaneously
Mineral fine can also be with certain ingredients in regeneration concrete (such as hydrated cementitious product calcium hydroxide and hydration in former concrete
Calcium silicates etc.) reaction, the product for reacting generation can fill microcrack on regeneration concrete, to improve regeneration concrete
Intensity.
In addition, water-reducing agent can be effectively reduced the water consumption and mix of system, the water absorption of regeneration concrete is reduced,
And then further increase the intensity of system.
Further, the coarse aggregate is using green field rubble, grain size specification 5-25mm, wherein 5-15mm specification and 16-
The mixed proportion of 25mm specification is 3:7, elongated particles≤5%.
The integral strength of system is effectively increased by the continuous grading of coarse aggregate by using above-mentioned technical proposal.
Further, the fine aggregate uses the mixture of artificial sand and river sand, the mixing ratio of the artificial sand and river sand
Example is 3:1, grain size specification 0.16-5mm, fineness modulus Max=2.7.
By using above-mentioned technical proposal, the grain size specification and coarse aggregate of fine aggregate form continuous grading, so that system has
Standby good intensity.Furthermore the addition of river sand can reduce certain production cost, and not have chloride ion compared to sea sand,
Be conducive to improve the intensity of concrete.
Further, the grain size specification of the regeneration concrete is 0.15-2.5mm.
By using above-mentioned technical proposal, part fine aggregate is substituted with little particle regeneration concrete, little particle regenerates coagulation
The micro-crack on native surface is few compared to bulky grain regeneration concrete, and the former concrete mortar of surface attachment is also less, has good
Good structural strength.
Further, in every cubic metre of dosage, according to parts by weight, raw material includes 6-8 parts of PAE resin.
By using above-mentioned technical proposal, PAE resin can be wrapped in the surface of regeneration concrete, so that regeneration concrete
Surface is rounder and more smooth, and reduces the water absorption rate of regeneration concrete, to improve its structural strength.In addition, PAE resin can also be filled up
The microcrack on regeneration concrete surface, so that the structural strength of regeneration concrete is further promoted.
Further, in every cubic metre of dosage, according to parts by weight, raw material includes 16-18 parts of graphene oxide, the oxygen
The oxygen content of graphite alkene is 25.43%.
By using above-mentioned technical proposal, graphene oxide can make to regenerate mortar and the microstructure of natural mortar obtains
Refinement, structure porosity reduce, and generate more hydrated products, microstructure is improved.
Another object of the present invention is to provide a kind of preparation methods of concrete, comprising the following steps:
Step 1, it pre-processes: recycled concrete aggregate is hammered, remove reinforcing bar and various impurity；
Step 2, break process: deimpurity concrete block will be gone by level-one break process, existed by high temperature oven
Drying heat treatment 15-30min under the conditions of 400-500 DEG C, then two-stage crushing processing is carried out by ball mill pulverizer；
Step 3, screening process sieves the concrete block after break process, obtains meeting less than 2.5mm partial size
Concrete particle；
Step 4, classification is handled: concrete particle is subjected to air classification processing, removes the micro mist that partial size is less than 0.15mm,
Obtain the regeneration concrete of 0.15-0.25mm；
Step 5, the modification of regeneration concrete: regeneration concrete is immersed in PAE resin, is kept 1min and is taken out placement
30min is drained, and is then dried for 24 hours at 50 DEG C by baking oven；
Step 6, the allotment of graphene oxide: dispersion liquid is made in graphene oxide plus water, the weight of graphene oxide is dense
Degree is 1.2-1.5%, and dispersion liquid is added in diminishing agent solution, stirs evenly acquisition mixed liquor；
Step 7, the preparation of concrete finished product: regeneration concrete, coarse aggregate and fine aggregate, miberal powder and flyash are mixed
30-60s is stirred, cement and water is added, continues stirring until uniformly mixed.
It carries out heating after being crushed regeneration concrete progress level-one by using above-mentioned technical proposal and enables to regenerate
Concrete is uniformly heated, so that the mortar adhered on regeneration concrete is more easy to fall off, to reduce the water suction of regeneration concrete
Rate and intensity.Regeneration concrete is entered in PAE resin and enables PAE resin sufficiently to wrap up regeneration concrete and enters its table
In the microcrack in face, play the role of filling up, by dry heating enable PAE resin secured be attached to regeneration concrete
On.
In conclusion the invention has the following advantages:
1. super finely ground slag can directly fill the microcrack on regeneration concrete, while super finely ground slag can also be with regeneration coagulation
Certain ingredients (hydrated cementitious product calcium hydroxide and afwillite in such as former concrete) reaction in soil, reaction generate
Product can fill the microcrack on regeneration concrete, to improve the intensity of regeneration concrete；
2. by thick, fine aggregate continuous grading the intensity of concrete can be effectively improved, and replace by regeneration concrete
For part fine aggregate, compared to substitution coarse aggregate, surface has less microcrack, advantageously reduces and brought to structural strength
Influence；
3.PAE resin can be wrapped in the surface of regeneration concrete, so that regeneration concrete surface is rounder and more smooth, and reduce
The water absorption rate of regeneration concrete, to improve its structural strength.In addition, PAE resin can also fill up the micro- of regeneration concrete surface
Crack, so that the structural strength of regeneration concrete is further promoted；
4. graphene oxide can make to regenerate mortar and the microstructure of natural mortar is refined, structure porosity drop
It is low, more hydrated products are generated, microstructure is improved, to improve concrete structural strength.
Detailed description of the invention
Fig. 1 is the flow chart of method provided by the invention.
Specific embodiment
Below in conjunction with attached drawing 1 and embodiment, invention is further described in detail.
Embodiment
Embodiment 1
A kind of concrete, in every cubic metre of dosage, according to parts by weight, raw material components are as shown in table 1.Wherein, this is mixed
Coagulate soil preparation method the following steps are included:
Step 1, it pre-processes: recycled concrete aggregate is hammered, remove reinforcing bar and various impurity；
Step 2, break process: deimpurity concrete block will be gone by level-one break process, existed by high temperature oven
Drying heat treatment 15-30min under the conditions of 400-500 DEG C, then two-stage crushing processing is carried out by ball mill pulverizer；
Step 3, screening process: the concrete block after break process is sieved, and obtains meeting less than 2.5mm partial size
Concrete particle；
Step 4, classification is handled: concrete particle is subjected to air classification processing, removes the micro mist that partial size is less than 0.15mm,
Obtain the regeneration concrete of 0.15-0.25mm；
Step 5, the modification of regeneration concrete: regeneration concrete is immersed in PAE resin, is kept 1min and is taken out placement
30min is drained, and is then dried for 24 hours at 50 DEG C by baking oven；
Step 6, the allotment of graphene oxide: dispersion liquid is made in graphene oxide plus water, the weight of graphene oxide is dense
Degree is 1.2-1.5%, and dispersion liquid is added in diminishing agent solution, stirs evenly acquisition mixed liquor；
Step 7, the preparation of concrete finished product: regeneration concrete, coarse aggregate and fine aggregate, miberal powder and flyash are mixed
30-60s is stirred, cement and water is added, continues stirring until uniformly mixed.
Wherein, coarse aggregate is using green field rubble, grain size specification 5-25mm, wherein 5-15mm specification and 16-25mm specification
Mixed proportion be 3:7, elongated particles≤5%.
Fine aggregate uses the mixture of artificial sand and river sand, and the mixed proportion of the artificial sand and river sand is 3:1, partial size rule
Lattice are 0.16-5mm, fineness modulus Max=2.7.
The grain size specification of regeneration concrete is 0.15-2.5mm, and the oxygen content of graphene oxide is 25.43%.
Embodiment 2
The difference from embodiment 1 is that according to parts by weight, raw material components are as shown in table 1 in every cubic metre of dosage.
Embodiment 3
The difference from embodiment 1 is that according to parts by weight, raw material components are as shown in table 1 in every cubic metre of dosage.
Comparative example
Comparative example 1
The difference from embodiment 1 is that according to parts by weight, raw material components are as shown in table 1 in every cubic metre of dosage.
Comparative example 2
The difference from embodiment 1 is that according to parts by weight, raw material components are as shown in table 1 in every cubic metre of dosage.
Comparative example 3
The difference from embodiment 1 is that according to parts by weight, raw material components are as shown in table 1 in every cubic metre of dosage.
Performance detection test
Intensity detection: referring to GB/T 50081-2002 " standard for test methods of mechanical properties of ordinary concrete ", to sample into
7 days intensity of row and strength test in 28 days, testing result are as shown in table 1.
Table 1 (every side's concrete material dosage, unit: kg)
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 (7)
1. a kind of concrete, it is characterised in that: in every cubic metre of dosage, according to parts by weight, raw material includes following components,
400-420 parts of cement；
100-120 parts of super finely ground slag；
30-40 parts of flyash；
10-15 parts of water-reducing agent；
1000-1050 parts of coarse aggregate；
400-450 parts of fine aggregate；
200-250 parts of regeneration concrete；
150-200 parts of water.
2. a kind of concrete according to claim 1, it is characterised in that: the coarse aggregate is using green field rubble, partial size rule
Lattice are 5-25mm, and wherein the mixed proportion of 5-15mm specification and 16-25mm specification is 3:7, elongated particles≤5%.
3. a kind of concrete according to claim 1, it is characterised in that: the fine aggregate is using the mixed of artificial sand and river sand
The mixed proportion of conjunction object, the artificial sand and river sand is 3:1, grain size specification 0.16-5mm, fineness modulus Max=2.7.
4. a kind of concrete according to claim 1, it is characterised in that: the grain size specification of the regeneration concrete is
0.15-2.5mm。
5. a kind of concrete according to claim 1, it is characterised in that: according to parts by weight, former in every cubic metre of dosage
Material includes PAE resin 6-8 parts.
6. a kind of concrete according to claim 1, it is characterised in that: according to parts by weight, former in every cubic metre of dosage
Material includes graphene oxide 16-18 parts, and the oxygen content of the graphene oxide is 25.43%.
7. the preparation method of -6 any a kind of concrete according to claim 1, which comprises the following steps:
Step 1, it pre-processes: recycled concrete aggregate is hammered, remove reinforcing bar and various impurity；
Step 2, break process: deimpurity concrete block will be gone by level-one break process, by high temperature oven in 400-500
Drying heat treatment 15-30min under the conditions of DEG C, then two-stage crushing processing is carried out by ball mill pulverizer；
Step 3, screening process: the concrete block after break process is sieved, and obtains meeting the coagulation less than 2.5mm partial size
Soil particle；
Step 4, classification is handled: concrete particle being carried out air classification processing, removes the micro mist that partial size is less than 0.15mm, is obtained
The regeneration concrete of 0.15-0.25mm；
Step 5, the modification of regeneration concrete: regeneration concrete is immersed in PAE resin, keeps 1min and take out to place 30min,
It drains, is then dried for 24 hours at 50 DEG C by baking oven；
Step 6, the allotment of graphene oxide: dispersion liquid is made in graphene oxide plus water, the weight concentration of graphene oxide is
1.2-1.5%, and dispersion liquid is added in diminishing agent solution, stir evenly acquisition mixed liquor；
Step 7, the preparation of concrete finished product: regeneration concrete, coarse aggregate and fine aggregate, miberal powder and flyash are mixed
30-60s adds cement and water, continues stirring until uniformly mixed.
Priority Applications (1)
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| CN201910381600.XA CN109970405A (en) | 2019-05-08 | 2019-05-08 | A kind of concrete and preparation method thereof |
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| CN201910381600.XA CN109970405A (en) | 2019-05-08 | 2019-05-08 | A kind of concrete and preparation method thereof |
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| CN111592324A (en) * | 2020-05-23 | 2020-08-28 | 杭州汉特建材有限公司 | Novel concrete and preparation method thereof |
| CN111747668A (en) * | 2020-07-10 | 2020-10-09 | 上海国烨建筑工程有限公司 | Preparation process and application of recycled concrete aggregate |
| CN111763026A (en) * | 2020-07-10 | 2020-10-13 | 上海国烨建筑工程有限公司 | Preparation process of recycled concrete aggregate |
| CN114262178A (en) * | 2021-12-09 | 2022-04-01 | 扬州通惠***集成科技有限公司 | Recycled fine aggregate high-strength self-compacting concrete and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111592324A (en) * | 2020-05-23 | 2020-08-28 | 杭州汉特建材有限公司 | Novel concrete and preparation method thereof |
| CN111592324B (en) * | 2020-05-23 | 2022-03-18 | 杭州汉特建材有限公司 | Concrete and preparation method thereof |
| CN111747668A (en) * | 2020-07-10 | 2020-10-09 | 上海国烨建筑工程有限公司 | Preparation process and application of recycled concrete aggregate |
| CN111763026A (en) * | 2020-07-10 | 2020-10-13 | 上海国烨建筑工程有限公司 | Preparation process of recycled concrete aggregate |
| CN114262178A (en) * | 2021-12-09 | 2022-04-01 | 扬州通惠***集成科技有限公司 | Recycled fine aggregate high-strength self-compacting concrete and preparation method thereof |
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Application publication date: 20190705 |