CN111348873A - Extra-coarse machine-made sand pumping concrete - Google Patents
Extra-coarse machine-made sand pumping concrete Download PDFInfo
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- CN111348873A CN111348873A CN202010098767.8A CN202010098767A CN111348873A CN 111348873 A CN111348873 A CN 111348873A CN 202010098767 A CN202010098767 A CN 202010098767A CN 111348873 A CN111348873 A CN 111348873A
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- made sand
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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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses extra-coarse machine-made sand pump concrete which is prepared by mixing the following raw material components in percentage by mass: 200-250 kg of cement, 100-120 kg of mineral powder, 100-130 kg of fly ash, 1080-1160 kg of fine aggregate, 620-640 kg of coarse aggregate, 170-180 kg of water and 9.4-11.2 kg of additive. The concrete is characterized in that fine aggregate is completely produced by adopting extra-coarse machine-made sand, the fineness modulus reaches 3.6-4.1, the sand rate exceeds 60%, the concrete is prepared by using a conventional cementing material, the mixing amount of mineral powder and fly ash exceeds 45%, the strength grade reaches C30 and above, the slump is larger than or equal to 200mm, the expansion degree is larger than or equal to 500mm, the working performance is good, and the pumping construction requirement of common concrete can be met. The application of the invention realizes the application of extra-coarse machine-made sand as the only fine aggregate in the pump concrete, and effectively relieves the pressure of shortage of medium sand resources at present.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to extra-coarse machine-made sand pump concrete.
Background
The fine aggregate is one of necessary composition materials of concrete, the quality of the fine aggregate has great influence on the strength, the workability and the durability of the concrete, and the traditional fine aggregate mainly adopts natural river sand, has the fineness of 2.3-3.0 and has excellent performance. As natural sand is a non-renewable resource, with the continuous construction of infrastructure and the continuous upgrading of national environmental protection policies, the continuous shortage of high-quality natural sand resources and the vigorous development of the construction industry are increasingly in conflict.
At present, machine-made sand replaces natural river sand to realize wider application, but the quality of the current machine-made sand is uneven, the machine-made sand in some areas is basically extra-coarse machine-made sand, the fineness modulus reaches 3.6-4.1, and no fine sand is used in a compounding way. The extra-coarse machine-made sand is used as the only fine aggregate to produce the pumping concrete, is easy to separate and bleed, and the stability of the mixture is poor, but under the condition that only extra-coarse machine-made sand is used as the fine aggregate, in order to ensure the pumping construction of the concrete, the extra-coarse machine-made sand pumping concrete with excellent performance needs to be developed.
Disclosure of Invention
The invention aims to provide extra-coarse machine-made sand pumping concrete, which has the advantages that the slump is larger than or equal to 200mm, the expansion is larger than or equal to 500mm, the working performance is good, and the problems of segregation and bleeding of concrete produced by extra-coarse machine-made sand and difficulty in realizing pumping construction are solved.
1. The technical scheme of the invention is as follows: the concrete consists of cement, mineral powder, fly ash, fine aggregate, coarse aggregate, water and an additive, and each cubic meter of the concrete comprises the following components by mass:
200-250 kg of cement, 100-120 kg of mineral powder, 100-130 kg of fly ash, 1080-1160 kg of fine aggregate, 620-640 kg of coarse aggregate, 170-180 kg of water and 9.4-11.2 kg of additive;
wherein: the fine aggregate is extra-coarse machine-made sand, the fineness modulus is 3.6-4.1, the crushing value is less than or equal to 30.0%, the stone powder content is 5.0-15.0%, and the MB value is less than 1.4.
In the invention, the cement is P.O42.5 grade cement.
In the invention, the mineral powder is S95 grade mineral powder.
In the invention, the fly ash is II-grade fly ash.
In the invention, the coarse aggregate is one of crushed stone or pebble, the gradation is 5-25 mm continuous gradation, the needle flake content is less than or equal to 10.0%, and the mud content is less than or equal to 1.0%.
In the invention, the water is tap water.
In the invention, the additive is a thickening polycarboxylic acid composite additive, and the water reduction rate is 20.0-23.0%.
Compared with the prior art, the invention has the beneficial effects that: under the condition that no medium sand or no coarse and fine sand is used in a matching way, the pumping concrete with good pumpability is prepared by adopting the extra-coarse machine-made sand as the only fine aggregate, the difficult problems that the concrete is easy to separate and bleed due to the coarse fine aggregate in the concrete are solved, the application of the low-grade extra-coarse machine-made sand in the pumping concrete is realized, and the problem of resource shortage of the current excellent sand is effectively alleviated.
Detailed Description
In order to make the contents, technical solutions and advantages of the present invention more apparent, the present invention is further illustrated below with reference to specific examples, which are only used for illustrating the present invention, and the present invention is not limited only to the following examples.
The following examples used the following raw materials:
the cement is P.O42.5 cement produced by Hunan conch cement Co., Ltd, and has a density of 3.05g/cm328 days strength 48.2 MPa; the mineral powder is HunanThe mineral powder of S95 grade produced by Sanhong building materials Co Ltd has an activity index of 104% in 28 days and a specific surface area of 430kg/m3(ii) a The fly ash is grade II fly ash produced by Minglonghui environmental protection science and technology development limited company in Yueyang, the fineness is 22 percent, the water demand ratio is 98 percent, and the 28-day activity index is 73 percent; the additive is a thickening polycarboxylic acid composite additive produced by Yueyang east Rainbow responsibility company Limited, and the water reduction rate is 21.4 percent; the water is tap water; the coarse aggregate is 5-25 mm continuous graded limestone macadam, the crushing value is 8.2%, and the mud content is 0.4%; the fineness modulus of extra-coarse machine-made sand is 3.8, the content of stone powder is 6.2%, the MB value is 1.0, and the crushing value is 22%.
Example 1
The extra-coarse machine-made sand pump concrete consists of the following raw materials by mass per cubic meter of concrete: 200kg of cement, 110kg of mineral powder, 110kg of fly ash, 1150kg of extra-coarse machine-made sand, 630kg of broken stone, 175kg of water and 9.8kg of additive.
The prepared concrete has the following detection performances: the 28d strength is 38.4MPa, the slump is 220mm, the expansion is 550mm, and the pumping construction requirement of common concrete is met.
Example 2
The extra-coarse machine-made sand pump concrete consists of the following raw materials by mass per cubic meter of concrete: 240kg of cement, 110kg of mineral powder, 120kg of fly ash, 1120kg of extra coarse machine-made sand, 620kg of broken stone, 175kg of water and 10.4kg of additive.
The prepared concrete has the following detection performances: the 28d strength is 46.8MPa, the slump is 235mm, the expansion is 600mm, and the pumping construction requirement of common concrete is met.
Claims (7)
1. The extra-coarse machine-made sand pump concrete is characterized by comprising cement, mineral powder, fly ash, fine aggregate, coarse aggregate, water and an additive, wherein the mass of each cubic meter of concrete is as follows:
200-250 kg of cement, 100-120 kg of mineral powder, 100-130 kg of fly ash, 1080-1160 kg of fine aggregate, 620-640 kg of coarse aggregate, 170-180 kg of water and 9.4-11.2 kg of additive;
wherein: the fine aggregate is extra-coarse machine-made sand, the fineness modulus is 3.6-4.1, the crushing value is less than or equal to 30.0%, the stone powder content is 5.0-15.0%, and the MB value is less than 1.4.
2. The extra coarse machine-made sand pump concrete according to claim 1, wherein the cement is P.O42.5 grade cement.
3. The extra coarse machine-made sand pump concrete according to claim 1, wherein the ore powder is S95 grade ore powder.
4. The extra coarse machine-made sand pump concrete according to claim 1, wherein the fly ash is class II fly ash.
5. The extra coarse machine-made sand pump concrete according to claim 1, wherein the coarse aggregate is one of crushed stone or pebble, the gradation is a continuous gradation of 5-25 mm, the needle flake content is less than or equal to 10.0%, and the mud content is less than or equal to 1.0%.
6. The extra coarse machine-made sand pump concrete according to claim 1, wherein the water is tap water.
7. The extra coarse machine-made sand pump concrete according to claim 1, wherein the additive is a thickening polycarboxylic acid composite additive, and the water reduction rate is 20.0-23.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010098767.8A CN111348873A (en) | 2020-02-18 | 2020-02-18 | Extra-coarse machine-made sand pumping concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010098767.8A CN111348873A (en) | 2020-02-18 | 2020-02-18 | Extra-coarse machine-made sand pumping concrete |
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| Publication Number | Publication Date |
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| CN111348873A true CN111348873A (en) | 2020-06-30 |
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| CN202010098767.8A Pending CN111348873A (en) | 2020-02-18 | 2020-02-18 | Extra-coarse machine-made sand pumping concrete |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112008880A (en) * | 2020-09-03 | 2020-12-01 | 青州中联水泥有限公司 | Control method for preparing concrete by using all machine-made sand |
| CN112083138A (en) * | 2020-09-15 | 2020-12-15 | 中建西部建设西南有限公司 | Method for judging that mixing plant waste slurry water can be used for concrete production |
| CN114292070A (en) * | 2022-01-10 | 2022-04-08 | 中建西部建设湖南有限公司 | Low-grade mixed sand concrete capable of being poured in large-fall free dumping mode and detection method |
| CN117447142A (en) * | 2023-11-17 | 2024-01-26 | 中建西部建设(上海)有限公司 | Low-bleeding-rate concrete based on low-stone-powder-content machine-made sand and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701682A (en) * | 2012-06-29 | 2012-10-03 | 江苏建华管桩有限公司 | Pump concrete, pump concrete precast pile and production methods of pump concrete and pump concrete precast pile |
| CN104230223A (en) * | 2014-08-22 | 2014-12-24 | 中铁二局股份有限公司 | High-strength and vibration-free self-compacting concrete prepared from machine-made sand |
| CN104724989A (en) * | 2015-02-09 | 2015-06-24 | 华润水泥技术研发（广西）有限公司 | Ground limestone powder full-manufactured sand high-strength recycled self-compacting concrete and application thereof |
| CN105801053A (en) * | 2016-03-16 | 2016-07-27 | 武汉源锦商品混凝土有限公司 | Self-compacting concrete with high content of fly ash C40 |
| CN107117887A (en) * | 2017-06-08 | 2017-09-01 | 上海百理新材料科技股份有限公司 | A kind of method that use Machine-made Sand prepares fiber pump concrete |
| JP2017226587A (en) * | 2016-06-24 | 2017-12-28 | 住友大阪セメント株式会社 | Concrete composition |
| CN109336482A (en) * | 2018-12-08 | 2019-02-15 | 徐州楚光能源科技有限公司 | A kind of machine-made sand concrete and preparation method thereof |
| CN110317013A (en) * | 2019-04-29 | 2019-10-11 | 武汉理工大学 | A kind of low-quality C80 machine-made sand concrete and preparation method thereof to gather materials |
-
2020
- 2020-02-18 CN CN202010098767.8A patent/CN111348873A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701682A (en) * | 2012-06-29 | 2012-10-03 | 江苏建华管桩有限公司 | Pump concrete, pump concrete precast pile and production methods of pump concrete and pump concrete precast pile |
| CN104230223A (en) * | 2014-08-22 | 2014-12-24 | 中铁二局股份有限公司 | High-strength and vibration-free self-compacting concrete prepared from machine-made sand |
| CN104724989A (en) * | 2015-02-09 | 2015-06-24 | 华润水泥技术研发（广西）有限公司 | Ground limestone powder full-manufactured sand high-strength recycled self-compacting concrete and application thereof |
| CN105801053A (en) * | 2016-03-16 | 2016-07-27 | 武汉源锦商品混凝土有限公司 | Self-compacting concrete with high content of fly ash C40 |
| JP2017226587A (en) * | 2016-06-24 | 2017-12-28 | 住友大阪セメント株式会社 | Concrete composition |
| CN107117887A (en) * | 2017-06-08 | 2017-09-01 | 上海百理新材料科技股份有限公司 | A kind of method that use Machine-made Sand prepares fiber pump concrete |
| CN109336482A (en) * | 2018-12-08 | 2019-02-15 | 徐州楚光能源科技有限公司 | A kind of machine-made sand concrete and preparation method thereof |
| CN110317013A (en) * | 2019-04-29 | 2019-10-11 | 武汉理工大学 | A kind of low-quality C80 machine-made sand concrete and preparation method thereof to gather materials |
Non-Patent Citations (1)
| Title |
|---|
| 谭洪光: "《预拌混凝土实用技术-2015CCPA预拌混凝土分会年会暨第二届绿色混凝土发展高峰论坛论文集》", 31 October 2015, 中国建材工业出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112008880A (en) * | 2020-09-03 | 2020-12-01 | 青州中联水泥有限公司 | Control method for preparing concrete by using all machine-made sand |
| CN112083138A (en) * | 2020-09-15 | 2020-12-15 | 中建西部建设西南有限公司 | Method for judging that mixing plant waste slurry water can be used for concrete production |
| CN112083138B (en) * | 2020-09-15 | 2022-11-01 | 中建西部建设西南有限公司 | Method for judging whether waste slurry water of mixing plant can be used for concrete production |
| CN114292070A (en) * | 2022-01-10 | 2022-04-08 | 中建西部建设湖南有限公司 | Low-grade mixed sand concrete capable of being poured in large-fall free dumping mode and detection method |
| CN117447142A (en) * | 2023-11-17 | 2024-01-26 | 中建西部建设(上海)有限公司 | Low-bleeding-rate concrete based on low-stone-powder-content machine-made sand and preparation method thereof |
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Application publication date: 20200630 |
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