CN108455919A - A kind of high performance concrete - Google Patents
A kind of high performance concrete Download PDFInfo
- Publication number
- CN108455919A CN108455919A CN201810161206.0A CN201810161206A CN108455919A CN 108455919 A CN108455919 A CN 108455919A CN 201810161206 A CN201810161206 A CN 201810161206A CN 108455919 A CN108455919 A CN 108455919A
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- China
- Prior art keywords
- water
- high performance
- concrete
- cement
- flyash
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Classifications
-
- 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
-
- 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
Abstract
The invention discloses a kind of high performance concretes, belong to technical field of concrete.The high performance concrete, each cubic meter of concrete is according to following weight proportion：Water：Cement：Flyash：Fine aggregate：Coarse aggregate：Water-reducing agent=(150 166):(160‑328):(87‑180):(689‑796)：(1090‑1127):(2.49‑3.6).The high performance concrete of the present invention has preferable workability, mechanical property, IMAGE and economy.
Description
Technical field
The present invention relates to technical field of concrete, and in particular to a kind of high performance concrete.
Background technology
The design considerations of the match ratio of ordinary concrete is《Design of common concrete proportioning regulation》(JGJ55), Main Basiss
Intensity considers mix-design.And material used in construction site is designed and trial, it is desirable that make the concrete come not
Only to meet the requirement of preparation strength, also to meet wanting for workability, other mechanical properties, long-term behaviour and endurance quality
It asks, i.e. the requirement of high performance concrete reaches economical rationality to ensure concrete project quality.The preparation strength of concrete is required to production and construction
Concrete strength have sufficient fraction, determination is calculated according to design strength grade point and concrete strength standard deviation.According to《Commonly
Mix Design regulation》(JGJ55) match ratio designed cannot be satisfied the requirement in terms of these, and cushion cap work
Journey total cost is higher, and speed of application is slower.
Invention content
The purpose of the present invention is to provide a kind of high performance concretes, low, durable to solve existing concrete formula intensity
Property problem poor, of high cost.
The technical solution that the present invention solves above-mentioned technical problem is as follows：
A kind of high performance concrete, each cubic meter of concrete is according to following weight proportion：Water：Cement：Flyash：Thin bone
Material：Coarse aggregate：Water-reducing agent=(150-166):(160-328):(87-180):(689-796)：(1090-1127):(2.49-
3.6)。
Further, in preferred embodiments of the present invention, above-mentioned flyash is that density is 2200kg/m3Two level fine coal
Ash.
Further, in preferred embodiments of the present invention, above-mentioned fine aggregate is that apparent density is 2780kg/m3Sand.
Further, in preferred embodiments of the present invention, above-mentioned coarse aggregate is that apparent density is 2660kg/m3It is broken
Stone.
Further, in preferred embodiments of the present invention, above-mentioned water-reducing agent is naphthalene system or poly carboxylic acid series water reducer.
Further, in preferred embodiments of the present invention, the density of above-mentioned cement is 3100kg/m3。
Further, in preferred embodiments of the present invention, water：Cement：Flyash：Fine aggregate：Coarse aggregate：Water-reducing agent=
150:230:160:796：1099:3.5.
The invention has the advantages that：
The present invention by dense skeleton method of piling principle come optimization of mix proportion, with water：Cement：Flyash：Fine aggregate：
Coarse aggregate：Water-reducing agent=(150-166):(160-328):(87-180):(689-796)：(1090-1127):(2.49-3.6)
Ratio mix match made of gather materials composition skeleton so that the density of the concrete made can reach most dense state, to ensure most
The intensity of concrete will not reduce in the case of saving cement.When the bulk density of gathering materials in concrete reaches maximum, voidage reaches
Minimum, the concrete made in this way have preferable workability, mechanical property, IMAGE and economy.
The prevention of mass concrete of present invention concrete highest aquation temperature after cancelling cooling water pipe rises 50 DEG C or so, and internal-external temperature difference is less than 23
DEG C, crack does not occur for prevention of mass concrete.The cost of raw material of every cubic metre of concrete reduces by 30 yuan (about 80,000 yuan of cushion caps), saves work
About 5 days phases.After the technical solution, cost significantly reduces, and greatly shortens the construction period.
Description of the drawings
Fig. 1 is flyash and sand dense packing effect curve graph；
Fig. 2 is flyash and sand, rubble dense packing effect curve graph.
Specific implementation mode
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.The person that is not specified actual conditions in embodiment, the item suggested according to normal condition or manufacturer
Part carries out.Reagents or instruments used without specified manufacturer is the conventional products that can be obtained by commercially available purchase.
The density and fineness for the flyash that the present invention uses are smaller than sand, theoretical according to accumulation of gathering materials, not with density size
One gather materials to mix match, mutually fill, according to the variation of mixture proportion, the bulk density curve of gained can be gone out with parabolic
It is existing, and will appear peak of curve in a certain ratio, that is, reach most dense state.Aliquot part (two kinds of different materials) is taken,
Test result curve matching it is corresponding to be calculated maximal density by the density value under detection different proportion by curve equation
Ratio value, the ratio value are the dense packing factor of both different materials.The present invention takes aliquot part (flyash first
And sand), ratio and ratio variation range are estimated, bulk density testing inspection is carried out, it is bent according to the bulk density value of different proportion
Line chart finds out maximum density values and corresponding ratio value.Use again optimal proportion flyash and sand mixture and coarse aggregate into
Mixing for row different proportion is matched, and carries out bulk density testing inspection, maximum is found out according to the bulk density value curve graph of different proportion
Density value and corresponding ratio value.Thus ratio can calculate the minimum value of voidage and minimum cement mortar quantity, then root
According to the requirement design water-cement ratio (the water-cement ratio value for using for reference ordinary concrete) of intensity and durability, the water-cement ratio of C30 high performance concretes can
It is chosen between 0.36~0.45, finally finds out mixing water amount again.
The Optimal Mix Design process of the present invention is as follows：
1, the relevant raw materials physical function parameter of the engineering is as follows：The density of cement is 3100kg/m3, flyash it is close
Degree is 2200kg/m3, the apparent density of rubble is 2660kg/m3, the apparent density of sand is 2780kg/m3, the density of water is
1000kg/m3。
2, it selects the thickness of engineering actual use to gather materials and the raw material such as flyash, is tried into line density by different mixture proportions
It tests, test procedure is：It is that volume is passed since the flyash for mixing 5% in 3% ratio more than 3L to claim representative baked sand, quantity
Increase, when estimation density reaches near peak value, ratio is reduced to 1% and repeats do several times, is advisable with that obvious peak value can occur.Examination
Result is tested as shown in table 1 and Fig. 1.
1 dense packing effect data of table
| Dense packing factor-alpha | 0.05 | 0.08 | 0.11 | 0.14 | 0.17 | 0.20 | 0.23 |
| Maximum unit weight Uw/ (kg/m3) | 1681.2 | 1720.5 | 1736.9 | 1760.2 | 1765.3 | 1752.3 | 1720.2 |
It carries out curve fitting to the data of Fig. 1, show that the quadratic equation with one unknown formula of matched curve is：Y=-7148.3X2+
2250.3X+1584.6 seeking first derivative to this equation, and it is 0 to enable it.Acquire the dense packing factor-alpha of flyash and sand filling
=0.165, maximum unit weight Uw=1761.3kg/m3。
3, similarly, flyash plus sand is used to mix as fine aggregate, carrying out maximum dense packing effect with rubble tests, test result
As shown in table 2 and Fig. 2.
2 dense packing effect data of table
| Dense packing factor-beta | 0.38 | 0.41 | 0.44 | 0.47 | 0.5 | 0.53 | 0.56 |
| Maximum unit weight Uw/ (kg/m3) | 2053 | 2111 | 2152 | 2168 | 2163 | 2127 | 2093 |
It obtains obtaining dense packing with the fine aggregate of alpha proportion (containing flyash and sand) filling coarse aggregate from there through curve matching
Factor-beta=0.47, the maximum unit weight Uw=2166kg/m3 of three.
4, stone quality=Uw in maximum unit weight × (1- β)=1148kg.
5, chiltern amount=Uw × β in maximum unit weight × (1- α)=850kg.
6, flyash quality=Uw × β × α=168kg in maximum unit weight.
7, minimum voidage VV=0.19.
8, the amplification factor N of cement slurry volume is determined.If amplification factor is too small, although the dosage of cement, concrete can be reduced
Workability and intensity also can be undesirable, if excessive, then the purpose for reducing cement consumption, economy and durability can be not achieved
Also it is not reflected.Rational N=1.2 is found by test of many times.Slurry can wrap sandstone material, the slump reluctantly at this time
It meets the requirements, little loss of slump, and is suitable for pumping.Cement mortar quantity in concrete for filling and lubricating is VP=VV × N
=0.23.
9, dosage=1-VP=0.77 of aggregate.
10, the correction of aggregate dosage.Due to the amplification of cement slurry volume, then aggregate used in amounts adjustment, every cubic metre after adjustment
Each material utilization amount of concrete is：Rubble 1099kg, sand 796kg, flyash 160kg, sand coarse aggregate ratio 42%.
11, by the requirement of intensity and durability, this match ratio glue ratio is designed with reference to the water-cement ratio of ordinary concrete, is fetched water
Glue ratio is 0.38.Finally find out mixed and stirred in every side's concrete water be 150kg, cement consumption 230kg.
12, the volume of water-reducing agent is determined according to the Adaptability Analysis and construction workability of cement and water-reducing agent, is
3.5kg/m3。
Embodiment 1：
The high performance concrete of the present embodiment, each cubic meter of concrete is according to following weight proportion：Water：Cement：Fine coal
Ash：Fine aggregate：Coarse aggregate：Water-reducing agent=155:210:180:786：1099:3.6.
Embodiment 2：
The high performance concrete of the present embodiment, each cubic meter of concrete is according to following weight proportion：Water：Cement：Fine coal
Ash：Fine aggregate：Coarse aggregate：Water-reducing agent=155:230:160:796：1099:3.5.
Embodiment 3：
The high performance concrete of the present embodiment, each cubic meter of concrete is according to following weight proportion：Water：Cement：Fine coal
Ash：Fine aggregate：Coarse aggregate：Water-reducing agent=150:250:140:796：1099:3.5.
Embodiment 4：
The high performance concrete of the present embodiment, each cubic meter of concrete is according to following weight proportion：Water：Cement：Fine coal
Ash：Fine aggregate：Coarse aggregate：Water-reducing agent=158:280:110:796：1099:3.5.
Embodiment 5：
The high performance concrete of the present embodiment, each cubic meter of concrete is according to following weight proportion：Water：Cement：Fine coal
Ash：Fine aggregate：Coarse aggregate：Water-reducing agent=166:328:87:689：1127:2.49.
Embodiment 6：
The high performance concrete of the present embodiment, each cubic meter of concrete is according to following weight proportion：Water：Cement：Fine coal
Ash：Fine aggregate：Coarse aggregate：Water-reducing agent=150:230:160:796：1099:3.5.
Test example 1
Performance detection is carried out to above-described embodiment 1-6, the results are shown in Table 3.
Table 3
From table 3 it can be seen that match ratio provided in an embodiment of the present invention, as a result of dense skeleton method of piling so that
The dosage that cement is reduced under the premise of intensity and mobility all obtain satisfaction, has reached raising cracking resistance and has reduced cost
Good result.
Test example 2
Temperature-Stress split test is carried out to above-described embodiment 1-6, the results are shown in Table 4.
Table 4
From the point of view of verification result, concrete working performance and mechanical property are satisfied by requirement, and have good cracking resistance.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of high performance concrete, which is characterized in that each cubic meter of concrete is according to following weight proportion：
Water：Cement：Flyash：Fine aggregate：Coarse aggregate：Water-reducing agent=(150-166):(160-328):(87-180):(689-
796)：(1090-1127):(2.49-3.6).
2. high performance concrete according to claim 1, which is characterized in that the flyash is that density is 2200kg/m3's
Second class powered coal ash.
3. high performance concrete according to claim 1, which is characterized in that the fine aggregate is that apparent density is
2780kg/m3Sand.
4. high performance concrete according to claim 1, which is characterized in that the coarse aggregate is that apparent density is
2660kg/m3Rubble.
5. high performance concrete according to claim 1, which is characterized in that the water-reducing agent is that naphthalene system or polycarboxylic-acid subtract
Aqua.
6. high performance concrete according to claim 1, which is characterized in that the density of the cement is 3100kg/m3。
7. according to claim 1-6 any one of them high performance concretes, which is characterized in that water：Cement：Flyash：Thin bone
Material：Coarse aggregate：Water-reducing agent=150:230:160:796：1099:3.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810161206.0A CN108455919A (en) | 2018-02-27 | 2018-02-27 | A kind of high performance concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161206.0A CN108455919A (en) | 2018-02-27 | 2018-02-27 | A kind of high performance concrete |
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| CN108455919A true CN108455919A (en) | 2018-08-28 |
Family
ID=63216543
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110059334A (en) * | 2019-01-10 | 2019-07-26 | 宁夏大学 | A method of concrete is prepared using coal ash instead fine aggregate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08277153A (en) * | 1995-03-31 | 1996-10-22 | Fuminori Tomosawa | Light-weight high-strength concrete |
| JPH11180743A (en) * | 1997-12-24 | 1999-07-06 | Techno Resource Kk | Shot concrete admixture and shot concrete using the same |
| CN103922671A (en) * | 2014-03-31 | 2014-07-16 | 江苏扬建集团有限公司 | High performance and low shrinkage concrete for cellar structure of oversized area |
| CN104119035A (en) * | 2013-04-28 | 2014-10-29 | 杨哲 | High-performance concrete and preparation method thereof |
| KR101708214B1 (en) * | 2016-10-13 | 2017-02-21 | 주식회사 하나레미콘 | Eco-friendly Composition of Red-Mixed Concrete and Manufacturing Method thereof |
-
2018
- 2018-02-27 CN CN201810161206.0A patent/CN108455919A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08277153A (en) * | 1995-03-31 | 1996-10-22 | Fuminori Tomosawa | Light-weight high-strength concrete |
| JPH11180743A (en) * | 1997-12-24 | 1999-07-06 | Techno Resource Kk | Shot concrete admixture and shot concrete using the same |
| CN104119035A (en) * | 2013-04-28 | 2014-10-29 | 杨哲 | High-performance concrete and preparation method thereof |
| CN103922671A (en) * | 2014-03-31 | 2014-07-16 | 江苏扬建集团有限公司 | High performance and low shrinkage concrete for cellar structure of oversized area |
| KR101708214B1 (en) * | 2016-10-13 | 2017-02-21 | 주식회사 하나레미콘 | Eco-friendly Composition of Red-Mixed Concrete and Manufacturing Method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110059334A (en) * | 2019-01-10 | 2019-07-26 | 宁夏大学 | A method of concrete is prepared using coal ash instead fine aggregate |
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