CN104119035A - High-performance concrete and preparation method thereof - Google Patents
High-performance concrete and preparation method thereof Download PDFInfo
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- CN104119035A CN104119035A CN201310154493.XA CN201310154493A CN104119035A CN 104119035 A CN104119035 A CN 104119035A CN 201310154493 A CN201310154493 A CN 201310154493A CN 104119035 A CN104119035 A CN 104119035A
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Abstract
The invention discloses high-performance concrete. The high-performance concrete is characterized by comprising the following components in parts by weight: 200-300 parts of cement, 700-800 parts of fine aggregate, 1100-1200 parts of coarse aggregate, 70-80 parts of fly ash, 6-7 parts of water reducing agent and 160-170 parts of water. The invention also discloses a preparation method of the high-performance concrete. The prepared concrete disclosed by the invention has a slump degree of 120-160mm, has good water-retaining property, cohesiveness and fluidity required for different working conditions, and can reach a required concrete strength grade after certain conditions of maintenance.
Description
Technical field
The present invention relates to a kind of high performance concrete and preparation method thereof.
Background technology
Concrete is heterogeneous three-phase body, i.e. solid, liquids and gases.The shared volume of concrete mix three-phase is roughly, solid phase account for cumulative volume 73% ~ 84%, liquid phase accounts for 15% ~ 22%, gas phase accounts for 1% ~ 5%.The volume of three-phase is not unalterable, and in the setting and harden process after building, the shared volume of three-phase will constantly change, but final set changes minimizing later, show as cumulative volume and liquid phase and reducing, and gas phase is increasing, and is mainly that liquid phase runs off, evaporates and absorbed and cause by solid phase.In addition, the volume of three-phase also can change with the variation of envrionment conditions.The change of three phase volumes is that concrete produces crack one of the main reasons, and especially concrete produces before comparatively obviously (it has been generally acknowledged that accompanies shrinks, the crack that dry shrinkage etc. cause) of final set.
In the design of carrying out concrete mix, exactly under the prerequisite that meets related request, reduce the variation of three-phase body volume as far as possible, by sample, three-phase body is obtained to volume and adjust to optimum proportion.
Summary of the invention
Goal of the invention: the high performance concrete that the object of the present invention is to provide a kind of variation that can reduce three-phase body volume.
Another object of the present invention is to provide this concrete preparation method.
Technical scheme: high performance concrete of the present invention, comprises following component: 200～300 parts of cement, 700～800 parts of fine aggregates, 1100～1200 parts of coarse aggregates, 70～80 parts, flyash, 6～7 parts of water reducers, 160～170 parts, water.
Preferably, 280 parts of cement, 740 parts of fine aggregates, 1150 parts of coarse aggregates, 75 parts, flyash, 6.5 parts of water reducers, 165 parts, water.
Preferably, concrete water cement ratio is 0.49, and concrete unit unit weight is 2400kg/m, and sand coarse aggregate ratio is 39%.
Preferably, described coarse aggregate adopts two kinds of rubbles of 5 ~ 25mm and 25 ~ 31.5mm to arrange in pairs or groups, the continuous grading rubble of composition 5 ~ 31.5mm.
Further preferably, the weight ratio of described 5 ~ 25mm and two kinds of rubbles of 25 ~ 31.5mm is 8:2.
Preferably, described fine aggregate is medium sand, Mx=2.7.
The preparation method of high performance concrete of the present invention, comprises the steps:
(1) cement, fine aggregate are added in stirrer together with flyash, stir 10～40s;
(2) in stirrer, add water, stir 10～30s, then add coarse aggregate;
(3) water reducer is joined in stirrer again, continue to stir;
(4) all add after stirrer until all material, only stir discharging after 90 ~ 180 s.
The present invention compared with prior art, its beneficial effect is: the concrete slump that the present invention makes is 120～160mm, there is required mobility under good water-retentivity, glutinous poly-property and different operating condition, after certain condition maintenance, can reach required strength grade of concrete; 2, concrete of the present invention, by the rational proportion between each component, is ensureing under the prerequisite of required strength grade of concrete, can make cement consumption in every side's concrete reduce 50kg left and right, thereby reduce concrete production cost.
Embodiment
Below technical solution of the present invention is elaborated, but protection scope of the present invention is not limited to described embodiment.
embodiment:high performance concrete of the present invention, comprises following component: 280 parts of cement, 740 parts of fine aggregates, 1150 parts of coarse aggregates, 75 parts, flyash, 6.5 parts of water reducers, 165 parts, water.
Described coarse aggregate adopts two kinds of rubbles of 5 ~ 25mm and 25 ~ 31.5mm to arrange in pairs or groups, the continuous grading rubble of composition 5 ~ 31.5mm; The weight ratio of described 5 ~ 25mm and two kinds of rubbles of 25 ~ 31.5mm is 8:2; Described fine aggregate is medium sand, Mx=2.7.
The preparation method of high performance concrete of the present invention, is characterized in that comprising the steps:
(1) cement, fine aggregate are added in stirrer together with flyash, stir 10～40s;
(2) in stirrer, add water, stir 10～30s, then add coarse aggregate;
(3) water reducer is joined in stirrer again, continue to stir;
(4) all add after stirrer until all material, only stir discharging after 90 ~ 180 s.
As mentioned above, although represented and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Not departing under the spirit and scope of the present invention prerequisite of claims definition, can make in the form and details various variations to it.
Claims (7)
1. a high performance concrete, is characterized in that comprising following component: 200～300 parts of cement, 700～800 parts of fine aggregates, 1100～1200 parts of coarse aggregates, 70～80 parts, flyash, 6～7 parts of water reducers, 160～170 parts, water.
2. high performance concrete according to claim 1, is characterized in that: 280 parts of cement, 740 parts of fine aggregates, 1150 parts of coarse aggregates, 75 parts, flyash, 6.5 parts of water reducers, 165 parts, water.
3. high performance concrete according to claim 1, is characterized in that: concrete water cement ratio is 0.49, and concrete unit unit weight is 2400kg/m, and sand coarse aggregate ratio is 39%.
4. high performance concrete according to claim 1, is characterized in that: described coarse aggregate adopts two kinds of rubbles of 5 ~ 25mm and 25 ~ 31.5mm to arrange in pairs or groups, the continuous grading rubble of composition 5 ~ 31.5mm.
5. high performance concrete according to claim 4, is characterized in that: the weight ratio of described 5 ~ 25mm and two kinds of rubbles of 25 ~ 31.5mm is 8:2.
6. high performance concrete according to claim 4, is characterized in that: described fine aggregate is medium sand, Mx=2.7.
7. the preparation method of high performance concrete according to claim 1, is characterized in that comprising the steps: that (1) adds cement, fine aggregate in stirrer together with flyash, stirs 10～40s;
(2) in stirrer, add water, stir 10～30s, then add coarse aggregate;
(3) water reducer is joined in stirrer again, continue to stir;
(4) all add after stirrer until all material, only stir discharging after 90 ~ 180 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310154493.XA CN104119035A (en) | 2013-04-28 | 2013-04-28 | High-performance concrete and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310154493.XA CN104119035A (en) | 2013-04-28 | 2013-04-28 | High-performance concrete and preparation method thereof |
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| CN104119035A true CN104119035A (en) | 2014-10-29 |
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| CN201310154493.XA Pending CN104119035A (en) | 2013-04-28 | 2013-04-28 | High-performance concrete and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402335A (en) * | 2014-11-14 | 2015-03-11 | 中国建筑材料科学研究总院 | High-strength concrete employing magnetized reduced roasted iron-beneficiation tailings as admixture |
| CN104773982A (en) * | 2015-03-31 | 2015-07-15 | 仲恺农业工程学院 | Novel high performance concrete and preparation method thereof |
| CN104909624A (en) * | 2015-05-26 | 2015-09-16 | 江苏高科物流科技股份有限公司 | High-toughness concrete composition |
| CN105084817A (en) * | 2015-07-29 | 2015-11-25 | 安徽砼宇特构科技有限公司 | Waterproof concrete and preparation method thereof |
| CN108455919A (en) * | 2018-02-27 | 2018-08-28 | 四川正达检测技术有限责任公司 | A kind of high performance concrete |
-
2013
- 2013-04-28 CN CN201310154493.XA patent/CN104119035A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402335A (en) * | 2014-11-14 | 2015-03-11 | 中国建筑材料科学研究总院 | High-strength concrete employing magnetized reduced roasted iron-beneficiation tailings as admixture |
| CN104773982A (en) * | 2015-03-31 | 2015-07-15 | 仲恺农业工程学院 | Novel high performance concrete and preparation method thereof |
| CN104909624A (en) * | 2015-05-26 | 2015-09-16 | 江苏高科物流科技股份有限公司 | High-toughness concrete composition |
| CN105084817A (en) * | 2015-07-29 | 2015-11-25 | 安徽砼宇特构科技有限公司 | Waterproof concrete and preparation method thereof |
| CN108455919A (en) * | 2018-02-27 | 2018-08-28 | 四川正达检测技术有限责任公司 | A kind of high performance concrete |
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Application publication date: 20141029 |