CN105218016A - Without the high-strength high-performance machine-made sand concrete of mineral spike - Google Patents
Without the high-strength high-performance machine-made sand concrete of mineral spike Download PDFInfo
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- CN105218016A CN105218016A CN201510550943.6A CN201510550943A CN105218016A CN 105218016 A CN105218016 A CN 105218016A CN 201510550943 A CN201510550943 A CN 201510550943A CN 105218016 A CN105218016 A CN 105218016A
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Abstract
The invention discloses a kind of high-strength high-performance machine-made sand concrete without mineral spike, comprise parent rock, Machine-made Sand, cement, water reducer and water, described parent rock ultimate compression strength is more than 80MPa, the weight content of the stone flour in described Machine-made Sand is 5-10%, the weight content of mud is less than 0.5%, described cement consumption 490-510kg/m
3, Stock allotment right is: water-cement ratio 0.30-0.33, sand coarse aggregate ratio 38-41%.Concrete formulation tool of the present invention has the following advantages: 1, without the need to adding mineral spike, save material, overcome the defect of mineral spike unstable properties, and when without mineral spike, ensure that the mechanical properties such as concrete ultimate compression strength can meet the concrete requirement of C50.2, by design parameter, concrete mobility, workability is increased.3, use parent rock, can gather materials on the spot, solve river sand problem in short supply; 4, can concrete cracks be reduced, increase concrete durability.
Description
Technical field
The present invention relates to concrete formula, particularly a kind of high-strength high-performance machine-made sand concrete without mineral spike.
Background technology
Existing concrete formulation comprises cement, sand, stone, admixture as water reducer and extra material, and wherein extra material is the mineral such as flyash, volcanic ash spikes, in order to improve concrete mechanics, chemical property.
Such as, publication No. is that the application for a patent for invention file of CN104310908A discloses a kind of concrete, and mixed by cement, medium sand, aggregate, reinforcing fibre, admixture and water, described each component mass parts is as follows: cement 300-450 part; Medium sand 650-800 part; Aggregate 780-900 part; Reinforcing fibre 10-20 part; Admixture 4-8 part; 180 parts-200 parts, water.Wherein reinforcing fibre is steel fiber, glass fibre and carbon fiber, be a kind of mineral spike, by reinforcing fibre disorderly and unsystematic distribution wherein, assist concrete to bear tensile stress, transmit tensile stress, stop the expansion of macroscopic fracture, thus improve concrete flexural strength and toughness.
And for example, publication number is that the patent of invention of CN101659535B discloses a kind of maritime concrete, and formula comprises cement clinker 30-35%; Ground slag powder 40-45%; Flyash 20-25%; Gypsum 5-8%, overcomes the defect such as ability decline, the large difference of mixture viscosity of concrete self-shrinkage increase, concrete cracking, hydrate combined chloride ion.
All have the existence of the mineral such as flyash, reinforcing fibre spike in technical scheme in above-mentioned two sections of documents, Problems existing is: 1, mineral spike unstable properties, cost are high; 2, need river sand, cannot gather materials on the spot when river sand is in short supply.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of high-strength high-performance machine-made sand concrete without mineral spike, under the mineral spike prerequisite of not adding, ensure concrete high strength, high-performance.
High-strength high-performance machine-made sand concrete without mineral spike of the present invention, comprise aggregate, Machine-made Sand, cement, water reducer and water, the weight content of the stone flour in described Machine-made Sand is 5-10%, and the weight content of mud is less than 0.5%, described cement consumption 490-510kg/m
3, Stock allotment right is: water-cement ratio 0.30-0.33, sand coarse aggregate ratio 38-41%.
Further, described cement consumption is 510kg/m
3, water-cement ratio is 0.32, and sand coarse aggregate ratio is 38%, and water reducer weight content is 1.15%.
Further, described aggregate and Machine-made Sand are obtained by parent rock, more than the ultimate compression strength 80MPa of described parent rock.
Further, described aggregate size is 5-25mm, and in described aggregate, I level aggregate and II level aggregate weigh ratio are 6.7:3.3.
Beneficial effect of the present invention: the high-strength high-performance machine-made sand concrete without mineral spike of the present invention, comprise parent rock, Machine-made Sand, cement, water reducer and water, described parent rock ultimate compression strength is more than 80MPa, the weight content of the stone flour in described Machine-made Sand is 5-10%, the weight content of mud is less than 0.5%, described cement consumption 490-510kg/m
3, Stock allotment right is: water-cement ratio 0.30-0.33, sand coarse aggregate ratio 38-41%.Concrete formulation tool of the present invention has the following advantages: 1, without the need to adding mineral spike, save material, overcome the defect of mineral spike unstable properties, and when without mineral spike, ensure that the mechanical properties such as concrete ultimate compression strength can meet the concrete requirement of C50.2, by design parameter (cement consumption, water-cement ratio, sand coarse aggregate ratio), concrete mobility, workability is increased.3, use parent rock, can gather materials on the spot, solve river sand problem in short supply; 4, can concrete cracks be reduced, increase concrete durability.
Embodiment
Embodiment D1-D7
Design parameter is in table 1.In table, the per-cent of sand coarse aggregate ratio, mineral blended amount, water reducer is all weight percents.
Wherein: aggregate and Machine-made Sand obtain by parent rock, the ultimate compression strength of parent rock is more than 80MPa, parent rock is ground to when particle diameter is the stone of 5-25mm and just obtains aggregate, that is the particle diameter of aggregate is 5-25mm, wherein: I level aggregate and II level aggregate blend proportion are 6.7:3.3, the particle diameter of I level aggregate is the particle diameter of 15-25mm, II level aggregate is 5-15mm
The weight content of the stone flour in Machine-made Sand is 5-10%, and the weight content of mud is less than 0.5%.When preparing concrete, envrionment temperature during cast controls at 8-15 DEG C, and note curing at moisture-retention and heat-insulation, internal-external temperature difference controls at 15-20 DEG C.
Reference examples S0
With embodiment of the present invention D1-D7 unlike, add existing convenient source flyash mineral adulterant in the concrete of reference examples S0, design parameter is in table 1.
Table 1 arranges without mineral volume concrete mix proportion experiment operating mode
Concrete workability test-results
Table 2 concrete workability test-results
Workability evaluation criteria is according to " highway engineering cement and cement concrete testing regulation " JTGE30-2005.
Find from table 2, although concrete formulation of the present invention is not containing mineral spike, by rational proportioning, that is: cement consumption 490-510kg/m3, water-cement ratio 0.3-0.33, sand coarse aggregate ratio 38-41%, the concrete workability trying to allot is better.
Concrete mechanics test-results
Table 3 concrete mechanics test-results
Table 3 finds cement consumption 490-510, water-cement ratio 0.3-0.33, sand coarse aggregate ratio 38-41%, examination is allotted the concrete seven sky of D1-D7 and 28 days intensity and the S0 that with the addition of mineral spike and all to be met the demands the concrete requirement of strength of C50, particularly as cement consumption 510kg/m3, water-cement ratio 0.32, the ultimate compression strength of sand coarse aggregate ratio 38% namely D7 is best, higher than the ultimate compression strength of the S0 that with the addition of mineral spike by 5%.Absolutely prove that the present invention is by rational cement consumption, water-cement ratio and sand coarse aggregate ratio proportioning, still can meet concrete mechanical requirements when can not add mineral spike.
Concrete permeability resistance test-results
Table 4 concrete charge pass test result
Utilize apparatus measures by concrete magnitude of voltage, displacement flux accumulated value, can Fast Evaluation concrete perviousness height, namely concrete supports chloride permeability merit rating method, is called for short coulometry.The concrete freeze-thaw-cycle performance of concrete Permeability and endurance quality.This method is applicable to the concrete permeability values of high medium tenacity.
Displacement flux is less, and concrete durability is better.Each group of concrete sample 6h displacement flux test result is all less than 1000C, and chloride ion permeability is in low-down level.Particularly cement consumption 490kg/m
3, water-cement ratio 0.32, the displacement flux of sand coarse aggregate ratio 41% namely D2 is minimum, and weather resistance is also best.
Concrete frost resistance test-results
Table 5 Anti-idiotypic vaccine result
Note: in table, relative dynamic elastic modulus is the ratio of the Determination of Dynamic Elastic Modulus after freeze thawing N time and the preliminary survey Determination of Dynamic Elastic Modulus before freeze thawing.
Table 5 test-results shows: after 300 freeze-thaw cycle, and the concrete relative dynamic elastic modulus of each group all slightly declines, but is all greater than 90%, illustrates that they all have good frost resistance; The mass loss rate of each group is all 0%, shows unlisted.
To sum up, concrete of the present invention is when without mineral spike, and cement consumption 490-510kg/m3, water-cement ratio 0.3-0.33, sand coarse aggregate ratio 38-41%, can allot the concrete meeting the requirement of C50 high-strength high-performance.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (4)
1., without a high-strength high-performance machine-made sand concrete for mineral spike, it is characterized in that:
Comprise aggregate, Machine-made Sand, cement, water reducer and water, the weight content of the stone flour in described Machine-made Sand is 5-10%, and the weight content of mud is less than 0.5%, described cement consumption 490-510kg/m
3, Stock allotment right is: water-cement ratio 0.30-0.33, sand coarse aggregate ratio 38-41%.
2. the high-strength high-performance machine-made sand concrete without mineral spike according to claim 1, is characterized in that: described cement consumption is 510kg/m
3, water-cement ratio is 0.32, and sand coarse aggregate ratio is 38%, and water reducer weight content is 1.15%.
3. the high-strength high-performance machine-made sand concrete without mineral spike according to claim 2, is characterized in that: described aggregate and Machine-made Sand are obtained by parent rock, more than the ultimate compression strength 80MPa of described parent rock.
4. the high-strength high-performance machine-made sand concrete without mineral spike according to claim 3, is characterized in that: described aggregate size is 5-25mm, and in described aggregate, I level aggregate and II level aggregate weigh ratio are 6.7:3.3.
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| CN201510550943.6A CN105218016A (en) | 2015-09-01 | 2015-09-01 | Without the high-strength high-performance machine-made sand concrete of mineral spike |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110550914A (en) * | 2019-10-14 | 2019-12-10 | 上海浦盈混凝土有限公司 | high-strength concrete and preparation method thereof |
| CN115784680A (en) * | 2022-11-02 | 2023-03-14 | 广东派安建材有限公司 | High-strength high-rheological-property machine-made sand concrete and preparation method thereof |
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| US20090158960A1 (en) * | 2007-12-20 | 2009-06-25 | Icrete, Llc | Highly workable concrete compositions having minimal bleeding and segregation |
| CN101922236A (en) * | 2010-07-21 | 2010-12-22 | 中铁二十局集团第四工程有限公司 | The C50 made sand ultra-high pump concrete construction method |
| CN101936858A (en) * | 2010-08-23 | 2011-01-05 | 长安大学 | Macroscopic and microscopic texture reconstruction indoor test method for cement concrete pavement |
| CN102797253A (en) * | 2012-08-24 | 2012-11-28 | 江苏建华管桩有限公司 | Precast concrete pile and manufacturing method thereof |
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2015
- 2015-09-01 CN CN201510550943.6A patent/CN105218016A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090158960A1 (en) * | 2007-12-20 | 2009-06-25 | Icrete, Llc | Highly workable concrete compositions having minimal bleeding and segregation |
| CN101186478A (en) * | 2007-12-21 | 2008-05-28 | 重庆市大业混凝土有限公司 | Method for producing concrete mixture by using machine-made sand to substitute natural sand |
| CN101922236A (en) * | 2010-07-21 | 2010-12-22 | 中铁二十局集团第四工程有限公司 | The C50 made sand ultra-high pump concrete construction method |
| CN101936858A (en) * | 2010-08-23 | 2011-01-05 | 长安大学 | Macroscopic and microscopic texture reconstruction indoor test method for cement concrete pavement |
| CN102797253A (en) * | 2012-08-24 | 2012-11-28 | 江苏建华管桩有限公司 | Precast concrete pile and manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110550914A (en) * | 2019-10-14 | 2019-12-10 | 上海浦盈混凝土有限公司 | high-strength concrete and preparation method thereof |
| CN115784680A (en) * | 2022-11-02 | 2023-03-14 | 广东派安建材有限公司 | High-strength high-rheological-property machine-made sand concrete and preparation method thereof |
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Application publication date: 20160106 |