CN1762886A - High-strength concrete - Google Patents
High-strength concrete Download PDFInfo
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- CN1762886A CN1762886A CN 200510017929 CN200510017929A CN1762886A CN 1762886 A CN1762886 A CN 1762886A CN 200510017929 CN200510017929 CN 200510017929 CN 200510017929 A CN200510017929 A CN 200510017929A CN 1762886 A CN1762886 A CN 1762886A
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Abstract
The present invention relates to one kind of high strength concrete suitable for use in various building engineering. The high strength concrete contains in each cubic meter crushed stone more than 1350 kg, sand less than 600 kg, cement 300-400 kg and water 75-140 kg, contains water reducing agent in 0.5-2 wt% and may contain milled ore powder in 25 % of cement weight. The production process includes mixing and molding in formwork. Based on so-called 'pocket theory', the present invention optimizes the compounding ratio of aggregates to raise the strength of concrete greatly, reduce dead weight and sizes of members, expand the use range of concrete, save cement and other material and reduce pollution.
Description
Technical field: the present invention relates to the high-strength concrete that uses in a kind of various engineering construction.
Background technology: along with China's rapid economy development, the quickening of capital construction projects rhythm, concrete is widely used.Concrete is in crucial position equally in our life, no matter be trip or lodging, and we are using it every day.But, concrete processing and production, except that special requirement, the technology of employing and proportioning all are common ways, and the defective of existence is that volume is big, and intensity is not high, has influenced construction quality and use range.
Summary of the invention: the present invention has overcome above defective, and a kind of save energy is provided, and reduces the high-strength concrete that pollutes.Described prescription is (kg/m
3) rubble＞1350kg, sand＜600kg, cement 300-400kg, water 75-140kg and water reducer 0.5-2%, can add ground blast furnace slag and be cement heavy 1/4; Its production method is above-mentioned materials to be mixed stir, and pours moulding in the template into.Because the present invention has adopted " pocket " theory, concrete strength is significantly improved, scantling and deadweight have further been reduced, enlarge concrete use range, saved a large amount of cement and starting material, reduced pollution, and workability of the present invention is excellent, good endurance, cost is low, thereby has good social benefit and economic benefit.
Embodiment: prescription of the present invention is (kg/m
3) rubble＞1350kg, sand＜600kg, cement 300-400kg, water 75-140kg and water reducer 0.5-2%, can add ground blast furnace slag and be cement heavy 1/4; Its production method is above-mentioned materials to be mixed stir, and pours moulding in the template into.
Adopt " pocket " theory in the present invention, its principle is that pocket itself does not have ultimate compression strength, and exsiccant grain does not have ultimate compression strength yet; When we pack into pocket and make grain closely knit of grain, the loading pocket shows good anti-pressure ability, and grain is closely knit more, the ultimate compression strength of loading pocket is higher.In concrete, the gelling thing is the effect of effect-immediate shipment grain pocket that hoop is reined in thing to what gathered materials, is grain in the pocket and gather materials.In " pocket " theory, concrete strength is relevant with two factors, i.e. the packing density that the hoop of gelling deposits yields is reined in power and gathered materials.
High-strength concrete is meant 28 days following strong concretes of the above 220MPa of intensity 60MPa.About strength of cement grade and concrete design strength definition and requirement, use ordinary Portland cement according to " Bao Luomi ", qualified rubble, sand, water and water reducer, maximum dose label are C25.And adopt " pocket " theory, not changing conventional production process, do not adopt exotic materials, but the material usage difference, by optimization to the proportioning of gathering materials, the preparation label is C70, makes 2-4 that concrete strength can reach strength of cement doubly, makes the intensity height, workability is excellent, good endurance, the high-strength concrete that cost is low makes the popularization of high-strength concrete become possibility.Both adopt different theoretical systems, just can draw different results.
Normal concrete proportioning and high-strength concrete proportioning compare: (kg/m
3)
| Stone sand cement water water reducer | ≤ 1350kg 〉=600kg 300-400kg 125-240kg generally need not | Stone sand cement water water reducer | ＞1350kg ＜600kg 300-400kg 75-140kg 0.5-2％ |
(can add ground blast furnace slag and be cement heavy 1/4)
In order to guarantee the high strength requirement of high-strength concrete, my door can produce minimum porosity according to " pocket " theory in gathering materials, so we have increased the weight of rubble in batching, has reduced the quantity of sand; Equally, construction water is the principal element that forms concrete pore, and in high-strength concrete, the hole that construction water forms accounts for more than 80% of concrete pore, and the control construction water has promptly been controlled the concrete pore amount.Therefore significantly reduce the construction water amount and increased the use of water reducer, thereby formed raising intensity, reduce hole, the high-strength concrete of ensuring the quality of products.
Claims (2)
1, a kind of high-strength concrete is characterized in that prescription is (kg/m
3) rubble＞1350kg, sand＜600kg, cement 300-400kg, water 75-140kg and water reducer 0.5-2%, can add ground blast furnace slag and be cement heavy 1/4; Its production method is above-mentioned materials to be mixed stir, and pours moulding in the template into.
2, high-strength concrete according to claim 1 is characterized in that adopting " pocket " theory, and its principle is that pocket itself does not have ultimate compression strength, and exsiccant grain does not have ultimate compression strength yet; When we pack into pocket and make grain closely knit of grain, the loading pocket shows good anti-pressure ability, and grain is closely knit more, the ultimate compression strength of loading pocket is higher; In concrete, the gelling thing is the effect of effect-immediate shipment grain pocket that hoop is reined in thing to what gathered materials, is grain in the pocket and gather materials; In " pocket " theory, concrete strength is relevant with two factors, i.e. the packing density that the hoop of gelling deposits yields is reined in power and gathered materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510017929 CN1762886A (en) | 2005-08-21 | 2005-08-21 | High-strength concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510017929 CN1762886A (en) | 2005-08-21 | 2005-08-21 | High-strength concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1762886A true CN1762886A (en) | 2006-04-26 |
Family
ID=36747245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510017929 Pending CN1762886A (en) | 2005-08-21 | 2005-08-21 | High-strength concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1762886A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575194B (en) * | 2008-05-08 | 2012-11-07 | 上海建工材料工程有限公司 | C80 pump concrete and preparation method thereof |
-
2005
- 2005-08-21 CN CN 200510017929 patent/CN1762886A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575194B (en) * | 2008-05-08 | 2012-11-07 | 上海建工材料工程有限公司 | C80 pump concrete and preparation method thereof |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |