CN107352897A - A kind of mixing proportion design method with high content stone powder aggregate chips concrete batching - Google Patents
A kind of mixing proportion design method with high content stone powder aggregate chips concrete batching Download PDFInfo
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- CN107352897A CN107352897A CN201710525991.9A CN201710525991A CN107352897A CN 107352897 A CN107352897 A CN 107352897A CN 201710525991 A CN201710525991 A CN 201710525991A CN 107352897 A CN107352897 A CN 107352897A
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0076—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials characterised by the grain distribution
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- Ceramic Engineering (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a kind of mixing proportion design method with high content stone powder aggregate chips concrete batching, including step：(1) big gravelstone ratio and sand coarse aggregate ratio are obtained by the tightly packed experiment of high content stone powder aggregate chips and stone；(2) sandstone voidage is calculated；(3) binder materials composition and water-cement ratio are selected；(4) binder materials and the dosage of water is calculated；(5) additional water flowing rate of high content stone powder aggregate chips is calculated；(6) admixture dosage is selected；(7) preliminary concrete is calculated and calculates match ratio；(8) concrete when calculating different slurry redundancy n values calculates match ratio, determines n values；(9) binder materials coefficient nb values are determined；(10) sand coarse aggregate ratio is determined；(11) final match ratio is determined.Match ratio designed by the present invention can substitute river sand to prepare concrete entirely using high content stone powder aggregate chips; and effectively utilize the space of the stone flour filler aggregate in high content stone powder aggregate chips; so as to reduce gel material content, environmental protection and cost-effective effect are reached.
Description
Technical field
The invention belongs to mix Design field, and in particular to one kind uses high content stone powder aggregate chips concrete batching
Mixing proportion design method.
Background technology
Domestic construction industry is in fast-developing period, the exploitation of reconstruction of the old city town and the new building of large area, band at present
The problem of construction material inadequate resource is carried out.For a long time, China builds fine aggregate based on river sand, China most area river
Sand shortage, not only when with sand peak sand it is on the high side, provided even without natural sand, with the huge situation of sand breach
Under, the process of Urbanization Construction is have impact on, or even some coastal areas use the serious quality safety that have impact on building of sea sand.
Do substantial amounts of research, predominantly Machine-made Sand with other fine aggregates substitution river sand both at home and abroad at present, recycled fine aggregate,
And aggregate chips.Aggregate chips is to produce the byproduct sifted out during rubble, often produces 100 tons of rubbles, about produces 20~30 tons of stones
Bits.Its discarded object as stone pit, not only occupied ground but also environment was polluted, aggregate chips is used to substitute river sand in concrete, both may be used
Social resources are made full use of, can also reduce the demand to river sand, reduction excessively adopts harm of the sand to river course, has very high warp
Ji and social benefit.
And in general aggregate chips grading is poor, 4.75mm rubble is more than containing some, and contains a large amount of stones in aggregate chips
Powder, cause chips concrete service behaviour poor, therefore the popularization and application of chips concrete are difficult.
And by being processed to aggregate chips, the rubble that will be greater than more than 4.75mm is made smaller than below 4.75mm fine aggregate
Mixed with the original aggregate chips less than below 4.75mm.It on the one hand can so improve the grading of aggregate chips, on the other hand will be small made of stones
For into aggregate chips, increase the aggregate in aggregate chips, relatively original below the 4.75mm of powder aggregate chips is reduced, and crush index diminishes.Make
The performance of aggregate chips improves, and is advantageous to promoting the use of for aggregate chips.
But although this processing method still suffers from the problem of content of stone powder is too high, its stone so that the grading of aggregate chips improves
Powder content is usually more than 10.0%, does not meet the regulation of existing national standard, and is difficult to apply.
In view of containing a large amount of stone flours in high content stone powder aggregate chips, fine application of gathering materials, the sky of filler aggregate can be used as
Gap, so as to reduce gel material content and cost.On the basis of experimental study, the mixing proportion design method of this patent is proposed.
The content of the invention
The present invention is mainly in existing technical standard, using closely knit design principle, by adjusting slurry redundancy, with
And high content stone powder aggregate chips substitution binder materials, reduce the series of steps such as sand coarse aggregate ratio and design a rational match ratio.
The present invention is realized by following scheme：
A kind of mixing proportion design method with high content stone powder aggregate chips concrete batching, comprise the following steps：
(1) by the tightly packed experiment of a variety of stones of different-grain diameter, the stone collocation of minimum voidage is obtained；
(2) toward admixture high content stone powder aggregate chips in the stone of step (1) collocation gained, by tightly packed experiment, obtain
Increase with sand coarse aggregate ratio, the minimum sand coarse aggregate ratio that voidage significantly reduces；
(3) in the ratio collocation high content stone powder aggregate chips and stone obtained by step (1), (2), tight packing density is determined,
Using it as the aggregate dosage in a cubic meter of concrete, each aggregate quality and aggregate voidage is calculated；
(4) volume of air in concrete is deducted in aggregate space, obtains the volume that slurry needs to fill；
(5) by the concrete performance requirement of design requirement, with reference to river sand concrete selection binder materials composition and water-cement ratio；
(6) a slurry redundancy n for being more than 1 is taken, the cumulative volume of slurry is calculated, and then gelling material is calculated
The dosage of material and water；
(7) additional water flowing rate of high content stone powder aggregate chips is calculated, the additional water flowing rate multiplies equal to high content stone powder aggregate chips quality
High content stone powder aggregate chips saturation coefficient is multiplied by with the dry water absorption rate of saturation plane, additional water flowing rate is not counted in water-cement ratio, is not counted in volume；
(8) admixture dosage is selected, the water in additive need to be included in water-cement ratio；
(9) by above-mentioned steps, preliminary concrete is calculated and calculates match ratio；
(10) slurry redundancy n values are changed, concrete when calculating different n values calculates match ratio；
(11) concrete optimum is carried out, according to working performance of concrete, determines admixture dosage and minimum slurry system more than needed
Number n values；
(12) on the basis of the concrete proportioning that step (11) determines, the concrete for reduce gel material content is real
Test, draw optimal binder materials coefficient nb；
(13) concrete mix when obtaining different sand coarse aggregate ratios by changing sand coarse aggregate ratio；
(14) service behaviour is selected to meet desired minimum sand coarse aggregate ratio match ratio, as optimizing mixing proporiton；
(15) concrete density is determined, match ratio is checked, obtains the final match ratio of concrete.
Further, described high content stone powder aggregate chips refers to aggregate chips being all crushed to less than 4.75mm, content of stone powder
More than 10.0%, and the aggregate chips less than or equal to 20.0%.
Further, if the stone used in experiment meets the regulation of stone continuous grading, need not enter by step (1)
Row two or more stones collocation uses.
Further, volume of air described in step (4), the intermediate value of design load, non-bleed are can use for air-entraining concrete
Concrete takes 1.0~1.5%.
Further, the more excellent spans of slurry redundancy n described in step (6) is 1.05~1.15.
Further, high content stone powder aggregate chips saturation coefficient refers to high content stone powder aggregate chips moisture content and saturation in step (7)
The ratio of the dry water absorption rate in face, its span are 0%~100%.
Further, the span of the high content stone powder aggregate chips saturation coefficient is 10%~60%.
Further, in step (12), the concrete experiments for carrying out reducing gel material content, optimal gelling is selected
The step of material coefficient nb, specifically includes：The binder materials coefficient nb less than 1 is taken, gel material content is reduced, is contained with high stone flour
Amount aggregate chips substitutes binder materials and the volume of water in equal volume；The concrete experiments of different binder materials coefficient nb values are carried out, are passed through
The service behaviour of concrete is determined, selects optimal binder materials coefficient nb.
Further, the step (13) specifically includes：Keep binder materials, water consumption are constant to be changed the mixed of sand coarse aggregate ratio
Solidifying soil experiment, the dosage of its reclaimed water are free of the additional water of high content stone powder aggregate chips, when changing sand coarse aggregate ratio, keep aggregate cumulative volume not
Become, maximum sand coarse aggregate ratio is the sand coarse aggregate ratio obtained by step (12), reduces by 1~2% every time, determines the service behaviour of concrete, draw difference
Concrete mix during sand coarse aggregate ratio.
Further, the aggregate calculating process in step (13) includes：
Initial aggregate dosage by step (12) calculate gained, behind drop sand coarse aggregate ratio during, design overall sandstone body
Product is constant, and by reducing the volume of high content stone powder aggregate chips by rule, the volume of other aggregates accordingly increases, and obtains different bodies
The volume of various aggregates during product sand coarse aggregate ratio, then it is multiplied by by the volumes of various aggregates the apparent density of various aggregates, you can obtain each
The quality of kind aggregate.
Relative to prior art, the invention has the advantages that and beneficial effect：
(1) mixing proportion design method of the invention is directed to the characteristics of high content stone powder stone chip-powder content is high, based on sandstone
Aggregate theory of close packing, using stone flour in high content stone powder aggregate chips as it is fine gather materials be used, filler aggregate space, so as to
Effectively reduce gel material content.
(2) on the basis of sandstone aggregate is tightly packed, it is contemplated that it can further push aggregate aside after adding slurry, so that
Space between aggregate it is more tightly packed when increase, it is possible to substitute binder materials with fine aggregate, substitute fine aggregate with stone,
Therefore being further introduced into reduces the mix-design step of binder materials coefficient and sand coarse aggregate ratio, further improves coarse aggregate in concrete
Dosage, high content stone powder aggregate chips dosage is reduced, so as to improve concrete performance, reduce water reducer dosage, further reduce coagulation
Native cost.
Embodiment
The invention provides strength grade C30 high content stone powder chips concrete mixing proportion design methods, below by tool
The present invention will be further described for body embodiment.
Prepare raw material：
Cement：Using the 42.5R portland cements of P II, density 3140kg/m3；
Slag powders：Use S95 level miberal powders, density 2840kg/m3；
Flyash：Use III grade of flyash, density 2220kg/m3；
High content stone powder aggregate chips：Apparent density is 2620kg/m3, the dry water absorption rate of saturation plane is 1.4%, content of stone powder
15.0%；
Stone：Arranged in pairs or groups using large and small stone, great Shi particle diameter 5-20mm, apparent density 2660kg/m3, gravelstone is particle diameter 5-
10mm Guamishi, apparent density 2650kg/m3。
Water reducer：Make polycarboxylate water-reducer, solid content 20% by oneself.
Mix-design
A kind of mixing proportion design method with high content stone powder aggregate chips concrete batching, comprise the following steps：
S1, big gravelstone mixed proportion is determined, i.e., by the tightly packed experiment of a variety of stones of different-grain diameter, obtain minimum sky
The stone collocation of gap rate：
The large and small stone of different quality ratio is mixed using quartering, reference《Build with cobble, rubble》(GB/T
The compactness densities experiment of stone in 14685-2011).The blend proportion of big gravelstone is optimal when measuring tight packing density maximum
Ratio.It is 2 by the visible gravelstones of table 2-1 and great Shi optimum mixture ratios example：8.
The large and small stone mixing tight packing densities of table 2-1
| Gravelstone：Great Shi | 0:10 | 1:9 | 1.5：8.5 | 2:8 | 2.5:7.5 | 3:7 |
| Uw(kg/m3) | 1490 | 1508 | 1525 | 1538 | 1535 | 1532 |
The closs packing density of aggregate under S2, the different sand coarse aggregate ratios of measure, i.e., arranged in pairs or groups toward step S1 obtained by stone in fill Gao Shi
Powder content aggregate chips, by tightly packed experiment, obtain smaller voidage corresponding to sand coarse aggregate ratio, specifically include：
Using sample quarterlies, in a manner of high content stone powder aggregate chips fills coarse aggregate, different sand coarse aggregate ratio compound phases are measured
The bulk density U ' answeredw.Concrete operation method reference《Build with cobble, rubble》Stone is tight in (GB/T 14685-2011)
Close density test.The data obtained is shown in Table 2-2, obtains increasing with sand coarse aggregate ratio, and the minimum sand coarse aggregate ratio that voidage significantly reduces is 40%.
Table 2-2 high content stone powder aggregate chips rockfills sub- tight packing density
| Sand coarse aggregate ratio | 36% | 38% | 40% | 42% | 44% | 46% | 48% |
| γm(kg/m3) | 1819 | 1836 | 1864 | 1865 | 1869 | 1868 | 1866 |
S3, each aggregate quality and aggregate voidage are calculated, i.e., in the ratio collocation high content stone powder stone obtained by step S1, S2
Bits and stone, measure tight packing density are 1864kg/m3, using it as the aggregate dosage in a cubic meter of concrete, calculate each
Aggregate quality and aggregate voidage.Each aggregate quality and aggregate voidage as shown in following table 2-3.
The quality and aggregate voidage of each aggregates of table 2-3
| Aggregate type | Great Shi | Gravelstone | High content stone powder aggregate chips | Aggregate voidage |
| m(kg/m3) | 895 | 224 | 746 | 29.47% |
S4, slurry volume is calculated, i.e. the volume of air in concrete is deducted in aggregate space, obtains the body that slurry needs to fill
Product.
Gas content in the present embodiment setting slurry is set as 1.5%, and the air body in concrete is deducted in aggregate space
Product, therefore the volume ratio that can obtain slurry is 27.97%.
S5, the concrete performance requirement by design requirement, with reference to river sand concrete selection binder materials composition and water-cement ratio.
This example prepares C30 concrete, it is desirable to which concrete slump is more than 180mm, and 1h slump-loss is less than 30mm, by force
Degree meets C30 concrete requirements.
By the concrete performance requirement of design requirement, with reference to river sand concrete, select binder materials composition be 70% cement,
20% miberal powder and 10% flyash, water-cement ratio 0.50.
S6, binder materials and the dosage of water are calculated, be specially：
It is 1.10 to take slurry redundancy n, and the cumulative volume of slurry is calculated than 30.77%, i.e., slurry amount is 307.7
Rise, and then the dosage of binder materials and water is calculated as shown in following table 2-4.
The dosage of table 2-4 binder materials and water
| Material type | Cement amount | Cement | Miberal powder | Flyash | Water |
| m(kg/m3) | 366.9 | 256.8 | 73.4 | 36.7 | 183.5 |
S7, the additional water flowing rate for calculating high content stone powder aggregate chips, are specifically included：
It is 100% to take high content stone powder aggregate chips saturation coefficient, and the dry water absorption rate of high content stone powder aggregate chips saturation plane is 1.4%,
The additional water flowing rate of high content stone powder aggregate chips, which equal to high content stone powder aggregate chips quality is multiplied by the dry water absorption rate of saturation plane and is multiplied by high stone flour, to be contained
Aggregate chips saturation coefficient is measured, therefore calculates that must to add water consumption be 10.4kg/m3。
S8, selection admixture dosage, the volume of initial option additive is 1.1%, and the water in additive need to be included in glue
Than in.
S9, preliminary concrete calculating match ratio is calculated, as shown in following table 2-5.
The primary Calculation match ratio of table 2-5 concrete
Concrete when S10, the different n values of calculating calculates match ratio, i.e., by changing slurry redundancy n values, calculates not
Match ratio is calculated as shown in following table 2-6 with concrete during n values.
Concrete during table 2-6 difference n values calculates match ratio
S11, concrete optimum is carried out, according to working performance of concrete, determine admixture dosage and minimum slurry system more than needed
Number n values.Working performance of concrete see the table below 2-7 under different slurry redundancies, can determine that admixture dosage is by data
1.1% and minimum slurry redundancy n values be 1.10.
Working performance of concrete during table 2-7 difference n values
S12, binder materials coefficient nb values are determined, i.e., on the basis of the concrete proportioning that step S11 is determined, reduced
The concrete experiments of gel material content, the binder materials coefficient nb taken are 1.00,0.95,0.90.Its match ratio and workability
It can see the table below shown in 2-8, by the service behaviour of concrete, it is 0.95 to draw optimal binder materials coefficient nb.
Concrete mix and service behaviour during table 2-8 difference nb values
S13, concrete mix when obtaining different sand coarse aggregate ratios by changing sand coarse aggregate ratio, are specifically included：Keep binder materials, water
(additional water for being free of high content stone powder aggregate chips) dosage is constant, is changed the concrete test of sand coarse aggregate ratio；2% is reduced every time, is obtained
Concrete mix is as shown in following table 2-9 when going out different sand coarse aggregate ratios.
Concrete calculates match ratio during table 2-9 difference sand coarse aggregate ratios
S14, minimum sand coarse aggregate ratio is determined, that is, select service behaviour to meet desired minimum sand coarse aggregate ratio match ratio, coordinated as preferred
Than by shown in the service behaviour of concrete under the different sand coarse aggregate ratios of table 2 below -10, showing that 39.3% is minimum sand coarse aggregate ratio.
Working performance of concrete during table 2-10 difference sand coarse aggregate ratios
S15, measure concrete density, check match ratio, obtain the optimum mix of concrete.
Concrete density when determining sand coarse aggregate ratio 39.3% by step S14, match ratio is checked, obtains the final cooperation of concrete
Than with service behaviour such as following table 2-11.
Table 2-11 high content stone powder chips concrete match ratios
Table 2-12 river sands and high content stone powder chips concrete correction data
Note:440 yuan/t of cement, 320 yuan/t of slag, 180 yuan/t of flyash, 40 yuan/t of rubble, 60 yuan/t of river sand, high stone flour
2400 yuan/t of polycarboxylate water-reducer used in 25 yuan/t of content aggregate chips, river sand and high content stone powder aggregate chips.
It can be drawn by the comparative analysis of form：The high content stone powder chips concrete that this method is designed is in workability
Code requirement can be disclosure satisfy that with intensity, it is almost suitable with river sand；But than river sand save 9.5% binder materials and
15.2% concrete construction cost per square meter.
It is described above, patent preferred embodiment only of the present invention, but the protection domain of patent of the present invention is not limited to
This, any one skilled in the art is in the scope disclosed in patent of the present invention, according to the skill of patent of the present invention
Art scheme and its inventive concept are subject to equivalent substitution or change, belong to the protection domain of patent of the present invention.
Claims (10)
1. a kind of mixing proportion design method with high content stone powder aggregate chips concrete batching, it is characterised in that comprise the following steps：
(1) by the tightly packed experiment of a variety of stones of different-grain diameter, the stone collocation of minimum voidage is obtained；
(2) toward admixture high content stone powder aggregate chips in the stone of step (1) collocation gained, by tightly packed experiment, obtain with sand
Rate increase, minimum sand coarse aggregate ratio when voidage significantly reduces；
(3) in the ratio collocation high content stone powder aggregate chips and stone obtained by step (1), (2), tight packing density is determined, with it
For the aggregate dosage in a cubic meter of concrete, each aggregate quality and aggregate voidage is calculated；
(4) volume of air in concrete is deducted in aggregate space, obtains the volume that slurry needs to fill；
(5) by the concrete performance requirement of design requirement, with reference to river sand concrete selection binder materials composition and water-cement ratio；
(6) take one be more than 1 slurry redundancy n, the cumulative volume of slurry is calculated, so be calculated binder materials and
The dosage of water；
(7) additional water flowing rate of high content stone powder aggregate chips is calculated, the additional water flowing rate is multiplied by full equal to high content stone powder aggregate chips quality
High content stone powder aggregate chips saturation coefficient is multiplied by with the dry water absorption rate in face, additional water flowing rate is not counted in water-cement ratio, is not counted in volume；
(8) admixture dosage is selected, the water in additive need to be included in water-cement ratio；
(9) by above-mentioned steps, preliminary concrete is calculated and calculates match ratio；
(10) slurry redundancy n values are changed, concrete when calculating different n values calculates match ratio；
(11) concrete optimum is carried out, according to working performance of concrete, determines admixture dosage and minimum slurry redundancy n
Value；
(12) on the basis of the concrete proportioning that step (11) determines, the concrete experiments of gel material content reduce,
Draw optimal binder materials coefficient nb；
(13) concrete mix when obtaining different sand coarse aggregate ratios by changing sand coarse aggregate ratio；
(14) service behaviour is selected to meet desired minimum sand coarse aggregate ratio match ratio, as optimizing mixing proporiton；
(15) concrete density is determined, match ratio is checked, obtains the final match ratio of concrete.
2. a kind of mixing proportion design method with high content stone powder aggregate chips concrete batching according to claim 1, it is special
Sign is：Described high content stone powder aggregate chips refers to aggregate chips being all crushed to is more than 10.0% less than 4.75mm, content of stone powder,
And the aggregate chips less than or equal to 20.0%.
3. a kind of mixing proportion design method with high content stone powder aggregate chips concrete batching according to claim 1, it is special
Sign is：If experiment stone used meets the regulation of stone continuous grading, two kinds or more need not be carried out by step (1)
Kind stone collocation uses.
4. a kind of mixing proportion design method with high content stone powder aggregate chips concrete batching according to claim 1, it is special
Sign is：Volume of air described in step (4), the intermediate value of design load is can use for air-entraining concrete, and non-air-entraining concrete takes 1.0
~1.5%.
5. a kind of mixing proportion design method with high content stone powder aggregate chips concrete batching according to claim 1, it is special
Sign is：The more excellent spans of slurry redundancy n described in step (6) is 1.05~1.15.
6. with according to a kind of mixing proportion design method with high content stone powder aggregate chips concrete batching described in claim 1, it is special
Sign is：High content stone powder aggregate chips saturation coefficient refers to high content stone powder aggregate chips moisture content and the dry water absorption rate of saturation plane in step (7)
Ratio, its span is 0%~100%.
7. with according to a kind of mixing proportion design method with high content stone powder aggregate chips concrete batching described in claim 6, it is special
Sign is：The span of the high content stone powder aggregate chips saturation coefficient is 10%~60%.
8. a kind of mixing proportion design method with high content stone powder aggregate chips concrete batching according to claim 1, it is special
Sign is, in step (12), the concrete experiments for carrying out reducing gel material content, selects optimal binder materials coefficient nb
The step of specifically include：The binder materials coefficient nb less than 1 is taken, gel material content is reduced, with bodies such as high content stone powder aggregate chips
The volume of product substitution binder materials and water；The concrete experiments of different binder materials coefficient nb values are carried out, by determining concrete
Service behaviour, select optimal binder materials coefficient nb.
9. a kind of mixing proportion design method with high content stone powder aggregate chips concrete batching according to claim 1, it is special
Sign is：The step (13) specifically includes：Binder materials, the constant concrete test for being changed sand coarse aggregate ratio of water consumption are kept,
The dosage of its reclaimed water is free of the additional water of high content stone powder aggregate chips, when changing sand coarse aggregate ratio, keeps aggregate cumulative volume constant, maximum sand coarse aggregate ratio
For the sand coarse aggregate ratio obtained by step (12), 1~2% is reduced every time, determines the service behaviour of concrete, concrete when drawing different sand coarse aggregate ratios
Match ratio.
10. a kind of mixing proportion design method with high content stone powder aggregate chips concrete batching according to claim 9, it is special
Sign is that the aggregate calculating process in step (13) includes：
Initial aggregate dosage by step (12) calculate gained, behind drop sand coarse aggregate ratio during, design overall sandstone volume not
Become, by reducing the volume of high content stone powder aggregate chips by rule, the volume of other aggregates accordingly increases, and obtains different volume sand
The volume of various aggregates during rate, then it is multiplied by by the volumes of various aggregates the apparent density of various aggregates, you can obtain various bones
The quality of material.
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| CN112851222A (en) * | 2021-02-24 | 2021-05-28 | 中铁六局集团有限公司 | Machine-made sand self-compacting concrete mix proportion design method based on establishment of optimal flowing system |
| CN115206463A (en) * | 2022-06-30 | 2022-10-18 | 重庆茂侨科技有限公司 | Machine learning-based intelligent design method for concrete mix proportion |
| CN116768545A (en) * | 2023-06-21 | 2023-09-19 | 中铁二十二局集团轨道工程有限公司 | Shield segment concrete containing machine-made sand and manufacturing process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112608076A (en) * | 2019-10-23 | 2021-04-06 | 厦门天润锦龙建材有限公司 | Calculation method for stone powder mortar mixing proportion |
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| CN111308056B (en) * | 2020-04-17 | 2022-03-18 | 葛洲坝集团试验检测有限公司 | Concrete slump inference method based on mix proportion and raw material performance |
| CN112851222A (en) * | 2021-02-24 | 2021-05-28 | 中铁六局集团有限公司 | Machine-made sand self-compacting concrete mix proportion design method based on establishment of optimal flowing system |
| CN115206463A (en) * | 2022-06-30 | 2022-10-18 | 重庆茂侨科技有限公司 | Machine learning-based intelligent design method for concrete mix proportion |
| CN116768545A (en) * | 2023-06-21 | 2023-09-19 | 中铁二十二局集团轨道工程有限公司 | Shield segment concrete containing machine-made sand and manufacturing process |
| CN116768545B (en) * | 2023-06-21 | 2024-03-12 | 中铁二十二局集团轨道工程有限公司 | Shield segment concrete containing machine-made sand and manufacturing process |
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Application publication date: 20171117 |