CN108191338A - A kind of high-performance artificial sand concrete prepared by the use of mountain flour and rice hull ash as admixture - Google Patents
A kind of high-performance artificial sand concrete prepared by the use of mountain flour and rice hull ash as admixture Download PDFInfo
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- CN108191338A CN108191338A CN201810069680.0A CN201810069680A CN108191338A CN 108191338 A CN108191338 A CN 108191338A CN 201810069680 A CN201810069680 A CN 201810069680A CN 108191338 A CN108191338 A CN 108191338A
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- admixture
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- artificial sand
- rice hull
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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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of high-performance artificial sand concretes prepared by the use of mountain flour and rice hull ash as admixture.The concrete of the rice cubic meter includes the raw material of following parts by weight：500~650 parts of cement, 60~140 parts of admixture, coarse aggregate are 1000~1100 parts, and artificial sand is 650~730 parts, 150~170 parts of water, and water-reducing agent is 13~18 parts；Wherein described admixture is mountain flour and rice hull ash.In the mixing admixture that the present invention uses, mountain flour and rice hull ash are all that resource very abundant, raw material are cheap and easy to get；By selecting the mixing admixture of suitable proportion, the preferable high performance concrete of working performance and compression strength has been obtained；Which not only improves mountain flour and the utilization rate and added value of rice hull ash, while reduce the dosage of cement, alleviate the pressure that high performance concrete supplies cement and ultrafine slag powder, reduce the cost of manufacture of concrete, meet the demand of sustainable development.
Description
Technical field
Building material field of the present invention, more particularly, to a kind of height prepared by the use of mountain flour and rice hull ash as admixture
The artificial sand concrete of performance.
Background technology
With continuous enhancing of the people to the protective awareness of natural resources and natural environment, in national sandstone standard《Building
Use sand》（GB/T14684-2001）After promulgation, artificial sand formally enters national standard as a kind of novel architecture sand.At present
It is also more and more for the research of artificial sand.China's artificial sand resource is very sufficient, substitutes natural sand and prepares high performance concrete,
It is made to become Fei Weibao, can be protected environment in this way, river sand exploitation is reduced and serious ecological destruction in pole is destroyed to riverbed, it is another
Aspect can also alleviate the problem of I crosses river sand shortage of resources.
High performance concrete is a kind of every mechanical property with concrete structure requirement, has high durability, height
The concrete of working performance and high volume stability.High-performance concrete additive uses high-quality fly ash, ultra-fine mostly at present
Slag, such admixture cost is higher, production energy consumption is larger.Therefore, exploit natural resources it is more, of low cost and production energy consumption compared with
Small admixture is the emphasis of concrete admixture research.
Mountain flour is generated during productive manpower sand, with a large amount of utilizations of artificial sand, the production of mountain flour
Will be more and more, it yet there are no the concrete for preparing mountain flour and rice hull ash as mixing admixture.
Invention content
It is a first objective of the present invention to provide a kind of high-performance artificials prepared by the use of mountain flour and rice hull ash as admixture
Sand concrete.By using mountain flour and rice hull ash as mixing admixture, the two mutually excites the present invention, has preferable coordinate
Effect can be obviously improved the reduction of working performance of concrete and compression strength caused by singly mixing rice hull ash.
Another object of the present invention is to listen the preparation method of the concrete.
To achieve these goals, present invention employs following scheme：
A kind of high-performance artificial sand concrete prepared by the use of mountain flour and rice hull ash as admixture, the concrete of rice cubic meter include
The raw material of following parts by weight：500~650 parts of cement, 60~140 parts of admixture, coarse aggregate are 1000~1100 parts, and artificial sand is
650~730 parts, 150~170 parts of water, water-reducing agent is 13~18 parts；Wherein described admixture is mountain flour and rice hull ash.
Preferably, described every cubic metre of raw material for including following important part of concrete：595 parts of cement, 65 parts of admixture, slightly
Aggregate is 1100 parts, and artificial sand is 691 parts, 162.5 parts of water, and water-reducing agent is 16.25 parts；Wherein described admixture is mountain flour and rice
Shell ash.
Preferably, described every cubic metre of raw material for including following important part of concrete：520 parts of cement, 130 parts of admixture,
Coarse aggregate is 1100 parts, and artificial sand is 691 parts, 162.5 parts of water, and water-reducing agent is 16.25 parts；Wherein described admixture for mountain flour and
Rice hull ash.
Mountain flour generates in artificial sand production process, and granite is rushed with limestone in shattering process by machinery
It necessarily has a large amount of powder during hitting, roll etc. to generate, as mountain flour.Application for mountain flour is generally to be used at present
Making roadbed serves as roadbed bottom and bankets, but this is the application worst to mountain flour economic benefit.The present invention is by mountain flour and rice hull ash
As admixture after mixing, partly to replace cement, the utilization ratio of mountain flour was both improved, after improving rice hull ash blending
The working performance and compression strength of concrete.
Rice hull ash has huge specific surface area and superelevation pozzolanic activity, is a kind of ideal active mineral additives.It is making
During standby high performance concrete, active rice husk ash has strong enhancing modifying function to concrete, can be greatly promoted cement
Hydration reaction, improve the microstructure of concrete, it made to obtain high intensity.
Using mountain flour with rice hull ash as admixture is mixed, mountain flour specific surface area used in one side will compared with cement and rice hull ash
It is small, more preferably grain composition can be provided, improve the intensity and durability of concrete；Another aspect rice hull ash can reduce mountain flour
The C/S ratios of blending cementitious material so that the eakleite production quantity in hydrated product increases, so as to improve the pressure resistance of concrete
Degree.In addition, SiO in rice hull ash2Can be generated as the hydrated product of serpentine class etc. with MgO, FeO etc., and this kind of hydrated product from
Body just has higher intensity.At mutually coordinated aspect, to concrete there are physical action, the filling effect of mountain flour blocks mountain flour
Partial penetration channel in concrete structure, the interfacial structure and interfacial contact for improving aggregate and hydrated product obtain performance；
Rice hull ash plays chemical action；Both as mixing admixture, the working performance and pressure resistance of concrete prepared by than singly mixing when
Degree is more preferable, has higher practical value.
By adjusting mountain flour and rice hull ash mixed proportion and the dosage of admixture so that the workability of normal concrete
It is optimal state with compression strength, to meet technology requirement of the engineering to concrete.
Preferably, in the concrete material, the ratio of mud 0.25.That is the dosage of water and cement and admixture gross mass
Ratio.
Preferably, mountain flour and the mass ratio of rice hull ash are 1.5 ︰, 1~1 ︰ 4 in the admixture.
It is highly preferred that mountain flour and the mass ratio of rice hull ash are 1.5 ︰ 1 or 1 ︰ 4 in the admixture.
Preferably, the specific surface area of the mountain flour is 500~1000m2/kg；It is highly preferred that specific surface area for 700~
800m2/kg。
Preferably, the specific surface area of the rice hull ash is 60~80m2/kg；Chemical composition by percentage to the quality, SiO2
Content is not less than 80%.
It is highly preferred that the chemical composition of rice hull ash is calculated as SiO with quality percentage2It is for 91.71%, CaO 0.86%, MgO
0.31%、Fe2O3For 0.90%, Al2O3It is 0.36%.
Preferably, the artificial sand is to first pass through jaw crusher by larger tcrude ore tentatively crush, after crushing
The artificial sand that the smaller ore of grain size sieves after being crushed using cone crusher.
Preferably, the admixture accounts for the 10%~20% of cementitious material gross mass.
Preferably, the coarse aggregate is rubble, and particle size is 10~15mm.
The present invention also protects the preparation method of above-mentioned concrete simultaneously, mainly includes the following steps that：First by mountain flour and rice husk
Ash is mixed to get mixing admixture according to said ratio, then will mixing admixture, cement, artificial sand, coarse aggregate, water and diminishing
Agent is mixed according to said ratio to get to high-performance artificial sand concrete.
Compared with prior art, the invention has the advantages that：
In the mixing admixture that the present invention uses, mountain flour and rice hull ash are all that resource very abundant, raw material are cheap and easy to get；Pass through choosing
The mixing admixture of suitable proportion is selected, has obtained the preferable high performance concrete of working performance and compression strength；This is not only carried
The high utilization rate and added value of mountain flour and rice hull ash, while reduce the dosage of cement, high performance concrete is alleviated to water
Mud and the pressure of ultrafine slag powder supply reduce the cost of manufacture of concrete, meet the demand of sustainable development.
Specific embodiment
The present invention is made with reference to specific embodiment and further being elaborated, the embodiment is served only for explaining this
Invention, is not intended to limit the scope of the present invention.Test method used in following embodiments is normal unless otherwise specified
Rule method；Used material, reagent etc., unless otherwise specified, for the reagent and material commercially obtained.
Artificial sand used in following embodiment is derived from Dongguan City high hill mountain town sheet Mei Cun stone pits, and the specific surface area of mountain flour is
700~800m2/ kg, the specific surface area of rice hull ash is 60~80m2/ kg, chemical composition are calculated as SiO with quality percentage2For
91.71%th, CaO 0.86%, MgO 0.31%, Fe2O3For 0.90%, Al2O3It is 0.36%；Cement gets over fort cement for Guangzhou to be had
Limit the golden II 42.5R Portland cements of sheep board P of responsible company's production；Coarse aggregate is broken for Daya Gulf stone field 10~15mm of production
Stone, water-reducing agent are section's outstanding person's KJ-JS polycarboxylate high performance water-reducing agents.
Embodiment 1
The preparation of 4 kinds of concrete, raw materials used proportioning are shown in Table 1.
The raw material proportioning of concrete in table 14
The working performance and compression strength of concrete in above-mentioned 4 are tested, the result is shown in shown in table 2.
24 kinds of working performance of concrete of table and compression strength
By Tables 1 and 2 it is found that first group and the 2nd, 3,4 group of data comparison, it is known that replaced when using mixing admixture in concrete
The working performance and compression strength of the concrete prepared after the cement in generation 10% are superior to the concrete of striaght cement preparation.From the 2nd,
3rd, the comparison between 4 groups of data, it is known that when mixing that mountain flour and the mass ratio of rice hull ash are 1 ︰ 1.5 in admixture, concrete
Working performance and compression strength are best, and early strength and later strength are above the concrete of striaght cement preparation, 7d, 28d and
The compression strength of the concrete of the compressive strength rate striaght cement of 90d is higher by 5.93 MPa, 7.24 MPa and 7.39MPa respectively.
It is above-mentioned it is demonstrated experimentally that substituting 10% concrete that is prepared of cement using mixing admixture of the present invention
Working performance and compression strength are superior to the concrete of striaght cement preparation, the quality when mix mountain flour in admixture and with rice hull ash
During than for 1 ︰ 1.5, the working performance and compression strength of concrete are best.
Embodiment 2
The ratio of admixture in embodiment 1 is become 20% from 10%, other raw material dosages are constant, concrete in preparing 4,
The dosage of raw material is shown in Table 3.
The raw material proportioning of 34 kinds of concrete of table
The working performance and compression strength of concrete in above-mentioned 4 are tested, the result is shown in shown in table 4.
44 kinds of working performance of concrete of table and compression strength
By table 3 and table 4 it is found that first group and the 2nd, 3,4 group of data comparison, it is known that replaced when using mixing admixture in concrete
The working performance and compression strength of the concrete prepared after the cement in generation 20% are superior to the concrete of striaght cement preparation.From the 2nd,
3rd, the comparison between 4 groups of data, it is known that when mixing that mountain flour and the mass ratio of rice hull ash are 1 ︰ 1.5 in admixture, concrete
Working performance and compression strength are best, and early strength and later strength are above the concrete of striaght cement preparation, 7d, 28d and
The compression strength of the concrete of the compressive strength rate striaght cement of 90d is higher by 14.39MPa, 15.4MPa and 15.75MPa respectively.
It is above-mentioned it is demonstrated experimentally that substituting 20% concrete that is prepared of cement using mixing admixture of the present invention
Working performance and compression strength are superior to the concrete of striaght cement preparation, the quality when mix mountain flour in admixture and with rice hull ash
During than for 1 ︰ 1.5, the working performance and compression strength of concrete are best.
Table 2 and table 4 are compared, it is known that when mixing that mountain flour is as the ratio of rice hull ash in admixture, admixture
Dosage when being 20%, the working performance and compression strength of the concrete of preparation are 10% coagulation prepared better than admixture dosage
Soil.When mixing that mountain flour and the mass ratio of rice hull ash are 1 ︰ 1.5 in admixture, the dosage of admixture is 20% concrete prepared
Compressive strength rate dosage be 10% high 9.94MPa.
It follows that it is 1 ︰ 1.5, and the dosage of admixture is when mixing mountain flour and the mass ratio of rice hull ash in admixture
When 20%, the working performance and compression strength of the concrete of preparation are best.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than the present invention is protected
The limitation of range is protected, for those of ordinary skill in the art, can also be made on the basis of above description and thinking
Other various forms of variations or variation, there is no necessity and possibility to exhaust all the enbodiments.It is all the present invention
All any modification, equivalent and improvement made within spirit and principle etc., should be included in the protection of the claims in the present invention
Within the scope of.
Claims (10)
- A kind of 1. high-performance artificial sand concrete prepared by the use of mountain flour and rice hull ash as admixture, which is characterized in that meter Li Fang The concrete of rice includes the raw material of following parts by weight：500~650 parts of cement, 60~140 parts of admixture, coarse aggregate for 1000~ 1100 parts, artificial sand is 650~730 parts, 150~170 parts of water, and water-reducing agent is 13~18 parts；Wherein described admixture is mountain flour And rice hull ash.
- 2. high-performance artificial sand concrete according to claim 1, which is characterized in that every cubic metre of the concrete include with Under important part raw material：595 parts of cement, 65 parts of admixture, coarse aggregate are 1100 parts, and artificial sand is 691 parts, and 162.5 parts of water subtracts Aqua is 16.25 parts；Wherein described admixture is mountain flour and rice hull ash.
- 3. high-performance artificial sand concrete according to claim 1, which is characterized in that every cubic metre of the concrete include with Under important part raw material：520 parts of cement, 130 parts of admixture, coarse aggregate are 1100 parts, and artificial sand is 691 parts, 162.5 parts of water, Water-reducing agent is 16.25 parts；Wherein described admixture is mountain flour and rice hull ash.
- 4. high-performance artificial sand concrete according to claim 1, which is characterized in that in the concrete material, the ratio of mud It is 0.25.
- 5. high-performance artificial sand concrete according to claim 1, which is characterized in that mountain flour and rice hull ash in the admixture Mass ratio be 1.5 ︰, 1~1 ︰ 4.
- 6. high-performance artificial sand concrete according to claim 5, which is characterized in that mountain flour and rice hull ash in the admixture Mass ratio be 1.5 ︰ 1 or 1 ︰ 4.
- 7. high-performance artificial sand concrete according to claim 1, which is characterized in that the specific surface area of the mountain flour is 500 ~1000m2/kg。
- 8. high-performance artificial sand concrete according to claim 1, which is characterized in that the specific surface area of the rice hull ash is 60 ~80m2/kg；Chemical composition by percentage to the quality, SiO2Content is not less than 80%.
- 9. high-performance artificial sand concrete according to claim 7, which is characterized in that the chemical composition of rice hull ash is with quality hundred Divide and be calculated as SiO2For 91.71%, CaO 0.86%, MgO 0.31%, Fe2O3For 0.90%, Al2O3It is 0.36%.
- 10. any high-performance artificial sand concrete of claim 1~9, which is characterized in that include the following steps：First by stone Powder and rice hull ash are mixed to get mixing admixture according to said ratio, then will mixing admixture, cement, artificial sand, coarse aggregate, Water and water-reducing agent are mixed according to said ratio to get to high-performance artificial sand concrete.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108675748A (en) * | 2018-06-25 | 2018-10-19 | 袁辉 | A kind of high-performance environment-friendly concrete and preparation method thereof |
| CN108911544A (en) * | 2018-08-13 | 2018-11-30 | 毕节双山开发区磐石建材有限公司 | A kind of admixture and its concrete and its their preparation method of preparation |
| CN110128083A (en) * | 2019-06-18 | 2019-08-16 | 广州建筑产业研究院有限公司 | A kind of high performance concrete and its preparation method and application based on artificial sand |
| CN112794688A (en) * | 2021-01-29 | 2021-05-14 | 武汉理工大学 | Early-strength low-shrinkage concrete for prefabricated parts and preparation process thereof |
| CN115124305A (en) * | 2022-06-24 | 2022-09-30 | 保利长大工程有限公司 | High-performance artificial sand concrete and preparation method thereof |
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| CN107540306A (en) * | 2017-08-21 | 2018-01-05 | 暨南大学 | A kind of admixture containing slag and rice hull ash and the high-strength concrete using its preparation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108675748A (en) * | 2018-06-25 | 2018-10-19 | 袁辉 | A kind of high-performance environment-friendly concrete and preparation method thereof |
| CN108911544A (en) * | 2018-08-13 | 2018-11-30 | 毕节双山开发区磐石建材有限公司 | A kind of admixture and its concrete and its their preparation method of preparation |
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| CN110128083B (en) * | 2019-06-18 | 2021-09-24 | 广州建筑产业研究院有限公司 | High-performance concrete based on artificial sand and preparation method and application thereof |
| CN112794688A (en) * | 2021-01-29 | 2021-05-14 | 武汉理工大学 | Early-strength low-shrinkage concrete for prefabricated parts and preparation process thereof |
| CN115124305A (en) * | 2022-06-24 | 2022-09-30 | 保利长大工程有限公司 | High-performance artificial sand concrete and preparation method thereof |
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