CN109776051A - Low-cost high-strength concrete - Google Patents
Low-cost high-strength concrete Download PDFInfo
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- CN109776051A CN109776051A CN201910148419.4A CN201910148419A CN109776051A CN 109776051 A CN109776051 A CN 109776051A CN 201910148419 A CN201910148419 A CN 201910148419A CN 109776051 A CN109776051 A CN 109776051A
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Abstract
The present invention provides a kind of low-cost high-strength concrete, component including following parts by weight: 231 parts of cement, 99 parts of admixture, 707 parts of fine aggregate, 461 parts of fine aggregate, coarse aggregate 692,4.62~5.94 parts of aliphatic water reducing agent and 133 parts of water, the admixture are flyash or miberal powder.The present invention solves the problems, such as that the manufacturing cost of concrete while improving concrete quality requirement in construction also increases accordingly.
Description
Technical field
The present invention relates to technical field of building construction, and in particular to a kind of low-cost high-strength concrete.
Background technique
Since present architectural engineering is higher and higher to commerical ready-mixed concrete quality requirements, the manufacture of corresponding commerical ready-mixed concrete
Also when the river rises the boat goes up for cost, is unfavorable for the cost control of architectural engineering.
Summary of the invention
To overcome the defects of present in the prior art, a kind of low-cost high-strength concrete is now provided, is applied with solving building
The problem of manufacturing cost of concrete also increases accordingly while improving concrete quality and requiring in work.
To achieve the above object, a kind of low-cost high-strength concrete is provided, the component including following parts by weight:
231 parts of cement, 99 parts of admixture, 707 parts of fine aggregate, 461 parts of fine aggregate and coarse aggregate 692, aliphatic water reducing agent
4.62~5.94 parts and 133 parts of water, the admixture is flyash or miberal powder.
Further, the cement is portland cement.
Further, the cement is early-strength normal silicate.
Further, the coarse aggregate and the fine aggregate are rubble graduation two, the particle size range 5mm of the rubble~
20mm。
Further, the fine aggregate is sand.
The beneficial effects of the present invention are, after flyash or miberal powder admixture incorporation concrete, the compatibility of water-reducing agent
Improved, and miberal powder to the water reducing and strength-increasing effect of aliphatic water reducing agent more preferably, water-reducing agent dosage is also opposite to be reduced, and the later period is strong
Degree is but strengthened.The incorporation of flyash can improve the adaptability of cement and aliphatic water reducing agent.Flyash is vitreum knot
Structure, surface are smooth few to the adsorbance of water-reducing agent；The addition of flyash reduces the relative amount of tricalcium aluminate in cement, thus
Reaction of the tricalcium aluminate to adsorbance and the tricalcium aluminate early stage and the high efficiency water reducing agent containing sulfonic acid group of water-reducing agent is reduced, is avoided
The consumption of aliphatic water reducing agent, makes the water-reducing agent give full play to its peptizaiton.The incorporation of miberal powder can be obviously improved aliphatic
The adaptability of water-reducing agent and cement, on the one hand, miberal powder is that levigate mineral powder granular shape is multiangular, leads to itself and cement granules
And contact point area is smaller between mineral powder granular, it is not easy to form flocculent structure, and miberal powder is small to water-reducing agent adsorbance, has
The addition of certain water-reducing effect, miberal powder can optimize cement slurry uniformity；On the other hand, the micro aggregate effect of miberal powder can change
Kind grain composition, makes the aperture of pore structure be fined and be homogenized, and reduces the gap between cement granules, and system Free water becomes more；
Finally, miberal powder is gradually occupied an leading position with the increase of miberal powder incorporation, the relative amount of tricalcium aluminate reduces in cement, keeps away
The consumption because of the absorption and hydration to water-reducing agent to water-reducing agent is exempted from, it is possible to appropriate reduction aliphatic water reducing agent
Volume.Miberal powder has the effect of enhancing to the adaptability of aliphatic water reducing agent, in the actual use work of aliphatic high-efficiency water reducing agent
Cheng Zhong can choose the performance for adding miberal powder to improve Commercial Concrete, moreover it is possible to the effective usage amount for reducing water-reducing agent, save the cost
While can also improve the quality of product.In addition, it can be found that miberal powder admixture is mixed after the molding of later period concrete test block
Enter, brought color problem after aliphatic high-efficiency water reducing agent incorporation concrete can be improved.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
The present invention provides a kind of low-cost high-strength concrete, the component including following parts by weight: 231 parts of cement is mixed
Close 99 parts of material, 707 parts of fine aggregate, 461 parts of fine aggregate, 692 parts of coarse aggregate, 4.62~5.94 parts of aliphatic water reducing agent and water
133 parts.
Admixture is flyash or miberal powder.
Flyash (Fly Ash): being in grey black, and quality of materials index reaches II grade of flyash standard, by Chongqing Luo semi-annular jade pendant electricity
Factory provides.Flyash is that the powder to get off is collected from the flue in thermal power plant is flyash with dust catcher, also referred to as
Flying dust.Flyash is one of biggish industrial residue of the current discharge capacity in China, will pollute atmosphere, nuisance if not being pocessed
Matter can also be done harm to huamn body.And in building material industry, we can turn waste into wealth it, turn bane into boon, with it as mineral
Admixture is used, and improves the performance of concrete.Flyash is the solid or hollow spherical particle of glassy state, and color is grey,
Surface texture is smooth, not hygroscopic, is not easy aquation.Due to there is the higher substance of chemical activity in its ingredient, so can effectively send out
Wave its function.Small with its configuration Portland fly ash cement drying shrinkage, crack resistance is high, is particularly suitable for large volume hydraulic engineering.
In low-cost high-strength concrete of the invention, flowing degree of net paste of cement is can be improved in the addition of flyash.Its
Main cause is: one, flyash activity is relatively low compared with cement, and early period is less to the consumption of water；Two, the micro aggregate effect of flyash can
To improve cement granules gradation, thus the gap between reducing cement granules, system Free water becomes more；Three, flyash is spherical shape, tool
There is certain ball lubricating action, has some improvement in mobility of the mix initial stage to cement slurry, use it to prepare
The workability of concrete can be enhanced in concrete.In addition, with the increase of coal ash instead amount, in order to reach same net slurry stream
Dynamic degree, can suitably reduce the dosage of water-reducing agent, and therefore, the incorporation of flyash can improve fitting for cement and aliphatic water reducing agent
Ying Xing.Its main cause is first, and flyash is vitreous structure, and surface is smooth few to the adsorbance of water-reducing agent；Second, powder
The addition of coal ash reduces the relative amount of tricalcium aluminate in cement (C3A), thus reduce C3A to the adsorbance of water-reducing agent and
The reaction of C3A early stage and the high efficiency water reducing agent containing sulfonic acid group, avoids the consumption of aliphatic water reducing agent, gives full play to water-reducing agent
Its peptizaiton.So the incorporation of flyash can improve the adaptability of cement and aliphatic water reducing agent.
Miberal powder (Mineral Powder): pale powder, density: 2.83g/m3, specific surface area 428m2/kg, Chongqing
Yu Hong regenerated resources Co., Ltd provides.Granulated blast-furnace slag is the clinker of blast furnace discharge through granular mine made of water quenching
Slag, since the method for mostly using water quenching carries out quenching, so also known as water-granulated slag.Water-granulated slag is mostly vitreous structure
(content reaches 60% or more), main chemical component have: CaO, SiO2、Al2O3、Fe2O3, MgO etc..After slag powders need to pass through
Phase milled processed can be only achieved defined fineness modulus, sale of putting into production.
Portland slag cement hydration heat is low, heat-resist, corrosion resistance is excellent.Ground granulated blast furnace slag can be used as
The high-quality mineral admixture of cement and concrete uses, and is the important mixing material of generally acknowledged preparation high performance concrete.Mine
The addition of powder mixing material not only can effectively improve the intensity of concrete, while can also inhibit alkali-aggregate reaction, reduce the heat of hydration,
Be conducive to the hardening of concrete structure early stage, it is not easy to crack occur, improve concrete density, effectively improve impermeability and resist and invade
Erosion ability.
In low-cost high-strength concrete of the invention, the incorporation of miberal powder can be obviously improved aliphatic water reducing agent and water
The adaptability of mud.On the one hand, the grain shape of levigate miberal powder is multiangular, causes it between cement granules and mineral powder granular
Contact point area is smaller, it is not easy to form flocculent structure, and miberal powder is small to water-reducing agent adsorbance, have certain diminishing effect
The addition of fruit, miberal powder can optimize cement slurry uniformity；On the other hand, the micro aggregate effect of miberal powder can improve grain composition,
So that the aperture of pore structure is fined and is homogenized, reduce the gap between cement granules, system Free water becomes more；Finally, with mine
The increase of powder incorporation, miberal powder are gradually occupied an leading position, in cement tricalcium aluminate (C3A) relative amount reduce, avoid because
Consumption for C3A to the absorption and hydration of water-reducing agent to water-reducing agent, it is possible to suitably reduction aliphatic high-efficiency water reducing agent
Volume.Miberal powder has the effect of enhancing to the adaptability of aliphatic water reducing agent, in the actual use of aliphatic high-efficiency water reducing agent
In engineering, can choose and add miberal powder to improve the performance of Commercial Concrete, moreover it is possible to the effective usage amount for reducing water-reducing agent, save at
This while, can also improve the quality of concrete product.
After flyash and miberal powder incorporation concrete, the compatibility of water-reducing agent is improved, and miberal powder is to aliphatic diminishing
More preferably, water-reducing agent dosage is also opposite to be reduced the water reducing and strength-increasing effect of agent, and later strength is strengthened.In addition, mixed from the later period
It can be found that the incorporation of mineral admixture after solidifying soil test block forming, after aliphatic high-efficiency water reducing agent incorporation concrete can be improved
Brought color problem.
Cement is portland cement.It (is drawn in Chongqing specifically, cement can be 42.5 ordinary portland cement of Lafarge P.O
The Ruian Fa Ji Cement Co., Ltd production), Lafarge P.O 42.5R early-strength ordinary portland cement (Chongqing Lafarge
Cement Co., Ltd production), 42.5 portland cement of Shandong Lu Cheng P.I.
As a kind of preferable embodiment, cement is early-strength normal silicate.Rich emperor P.O 42.5R early-strength is common
Portland cement (production of the Chongqing cement plant Fu Huang).
Coarse aggregate is rubble, and graduation two, partial size is that (wherein particle size range is that the coarse aggregate of 5mm~10mm accounts for 5mm~20mm
60%) 40%, 10~20mm are accounted for, performance indicator meets GB/T 14685 " for building cobble, rubble " and requires.
Fine aggregate is natural river sand, apparent density 2650kg/m3, counting mould degree accurately is 2.7, and clay content is less than 1%, saturation plane
Dry water absorption rate 0.96%, performance indicator meet GB/T 14684 " building sand " requirement.
Fine aggregate is sand.
Aliphatic water reducing agent, solid content are 41.0% (University Of Chongqing's polymer laboratory)；Solid content is 40.6% (Chongqing
Di Xiang building materials Co., Ltd production).
Aliphatic water reducing agent all a degree of can enhance it after adding coal ash, miberal powder and disperse water-reducing effect.No
It only improves to the performance of concrete, and also reduces the dosage of water-reducing agent, saved production cost.Add fat
The concrete that race's water-reducing agent is produced is not if being changed match ratio, it may appear that the deeper problem of color often reduces mixed
The quality for coagulating soil, influences the beauty of concrete.The admixture of mineral admixture (flyash and miberal powder) helps to mitigate concrete
Color problem even disappears completely.
In order to be more clearly understood that technology contents of the invention, spy lifts following embodiment and is described in detail.Hereinafter, in turn will
The embodiment of the present invention is described in detail with comparative example.
Embodiment 1
The present invention provides a kind of low-cost high-strength concrete, the component including following parts by weight: 231 parts of cement is mixed
Close 99 parts of material, 707 parts of fine aggregate, coarse aggregate (coarse aggregate includes 692 parts of 461 parts of fine aggregate and coarse aggregate), aliphatic water reducing agent
5.94 parts and 133 parts of water.
Admixture is flyash.
Admixture is miberal powder.
Coarse aggregate is rubble (partial size is 10~20mm).
Fine aggregate is rubble (partial size is 5~10mm).
Nominal capacity is used to be stirred for the single horizontal shaft type forced stirrer of 60L.First by the cement weighed up, sand, river sand,
Rubble etc. is added in blender and stirs evenly, and mixing water (water-reducing agent agent is added together with mixing water) then is added, stirs together
Low-cost high-strength concrete of the invention is obtained when to predetermined work.
Concrete slump is measured in 5min, then packing compact forming, be put into standard curing room maintenance.
Test concrete respectively by maintenance 3 days, 7 days, 28 days intensity, the results are shown in Table 1 for concrete bearing intension testing.
Embodiment 2
The present invention provides a kind of low-cost high-strength concrete, the component including following parts by weight: 231 parts of cement is mixed
99 parts of conjunction material, 707 parts of sand, 461 parts of fine aggregate, 692 parts of coarse aggregate, 4.62 parts of aliphatic water reducing agent and 133 parts of water.
Admixture is miberal powder.
Coarse aggregate is rubble (partial size is 10~20mm).
Fine aggregate is rubble (partial size is 5~10mm).
Nominal capacity is used to be stirred for the single horizontal shaft type forced stirrer of 60L.First by the cement weighed up, sand, river
Sand, rubble etc. are added in blender and stir evenly, and mixing water (water-reducing agent agent is added together with mixing water) then is added, stirs together
Low-cost high-strength concrete of the invention is obtained when mixing to predetermined work.
Concrete slump is measured in 5min, then packing compact forming, be put into standard curing room maintenance.
Test concrete respectively by maintenance 3 days, 7 days, 28 days intensity, the results are shown in Table 1 for concrete bearing intension testing.
Comparative example
The present invention provides a kind of concrete, the component including following parts by weight: 330 parts of cement, 707 parts of sand, fine aggregate
461 parts, 692 parts of coarse aggregate, 6.6 parts of aliphatic water reducing agent and 133 parts of water.
Admixture is miberal powder.
Coarse aggregate is rubble (partial size is 10~20mm).
Fine aggregate is rubble (partial size is 5~10mm).
Nominal capacity is used to be stirred for the single horizontal shaft type forced stirrer of 60L.First by the cement weighed up, sand, river sand,
Rubble etc. is added in blender and stirs evenly, and mixing water (water-reducing agent agent is added together with mixing water) then is added, stirs together
Concrete is obtained when to predetermined work.
Concrete slump is measured in 5min, then packing compact forming, be put into standard curing room maintenance.
Test concrete respectively by maintenance 3 days, 7 days, 28 days intensity, the results are shown in Table 1 for concrete bearing intension testing.
1 concrete crushing strength of table
Finally, it should be noted that obviously, above-described embodiment is only intended to clearly illustrate the application example, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the art, it can also do on the basis of the above description
Other various forms of variations or variation out.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
Shen go out obvious changes or variations still in the protection scope of the application type among.
Claims (5)
1. a kind of low-cost high-strength concrete, which is characterized in that the component including following parts by weight: 231 parts of cement, admixture
99 parts, 707 parts of fine aggregate, 461 parts of fine aggregate, coarse aggregate 692,4.62~5.94 parts of aliphatic water reducing agent and 133 parts of water, institute
Stating admixture is flyash or miberal powder.
2. low-cost high-strength concrete according to claim 1, which is characterized in that the cement is portland cement.
3. low-cost high-strength concrete according to claim 2, which is characterized in that the cement is early-strength ordinary silicon
Hydrochlorate.
4. low-cost high-strength concrete according to claim 1, which is characterized in that the coarse aggregate and the fine aggregate
For rubble graduation two, particle size range 5mm~20mm of the rubble.
5. low-cost high-strength concrete according to claim 1, which is characterized in that the fine aggregate is sand.
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| CN201910148419.4A CN109776051A (en) | 2019-02-28 | 2019-02-28 | Low-cost high-strength concrete |
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| CN201910148419.4A CN109776051A (en) | 2019-02-28 | 2019-02-28 | Low-cost high-strength concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112645664A (en) * | 2021-01-14 | 2021-04-13 | 湖南恒德混凝土有限公司 | Low-shrinkage low-viscosity ultrahigh-strength concrete |
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