CN102336541A - Method for preparing C90 high-performance concrete by using mountain sand as aggregate - Google Patents
Method for preparing C90 high-performance concrete by using mountain sand as aggregate Download PDFInfo
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- CN102336541A CN102336541A CN 201010236540 CN201010236540A CN102336541A CN 102336541 A CN102336541 A CN 102336541A CN 201010236540 CN201010236540 CN 201010236540 CN 201010236540 A CN201010236540 A CN 201010236540A CN 102336541 A CN102336541 A CN 102336541A
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Abstract
The invention discloses a method for preparing C90 high-performance concrete by using mountain sand as aggregate. The C90 high-performance concrete is prepared by mixing 4 raw materials, namely mountain sand and gravel serving as aggregates, cement serving as a cementing material, mineral powder and fly ash serving as a composite admixture and polycarboxylic acid series efficient water reducing agent, into water; and the C90 high-performance concrete comprises the following raw materials by weight in each cubic meter of a manufactured finished product: 400 to 500 kg/m<3> of cement, 100 to 200 kg/m<3> of composite admixture, 0.75 to 2.1 kg/m<3> of polycarboxylic acid series efficient water reducing agent (powder), water in an amount based on the ratio of the water to the cementing material of 0.24 to 0.28, and the balance of aggregates. The method not only has the advantages that river sand is not used and the river sand resource is not destroyed, but also has the advantages of simplicity and convenience in operation, low manufacturing cost and high strength, high durability and good workability of the product and the like. The C90 high-performance concrete can be widely applied in the building fields of bridges, roads, houses and the like.
Description
Technical field
The present invention relates to a kind of mountain sand that adopts and prepare the method for C90 high performance concrete, belong to C90 concrete for making technical field as aggregate.
Background technology
High performance concrete is a kind of novel High Technique Concrete, is the concrete that on the basis that increases substantially the normal concrete performance, adopts the modern concrete fabrication techniques.It to different purposes requirements, guarantees following performance focus: weather resistance, workability, suitability, intensity, volume stability and economy with the leading indicator of weather resistance as design.High performance concrete has the following advantages: 1 its intensity is high, has reduced the structure scantling, practices thrift material of construction significantly, thereby reduces the engineering construction cost; 2 its good endurance have reduced maintenance cost, prolong to build work-ing life; 3 its workabilities are good, and easy construction has reduced construction cost significantly.Thereby high performance concrete is applied in the construction every field widely.
Since the sixties in last century, a large amount of working strengths of countries such as the U.S., Norway are the concrete of 41MPa, and nineteen sixty-five is adopted 52MPa, use 62MPa in 1972, and nineteen eighty-two reaches 75MPa, jump in 1988 years to be 133MPa.The concrete possibility of a large amount of 140MPa of employing in cast-in-place integral body and prestressed reinforced concrete structure has appearred now.At present the existing Code for design of concrete structures of Germany has reached the C110 level, strength grade be the world today.1992, the big academician in Wuzhong made referrals to high performance concrete domestic first.In recent years, the research of China's high performance concrete, application development are very fast.High-strength high-performance concrete has obtained application more and more widely in actual engineering, for example: it all is the model who uses that silver-colored square (C80) etc. is closed in Shanghai Jin Mao Tower (C60), center, Jing'an, Beijing mansion (C80), Liaoning WuChan Building (C80), Guangzhou.
At present, domestic C50～C60 high-strength high-performance concrete has been widely used in engineerings such as bridge, Highrise buildings and airport construction; The also pilot application in engineering of C80 high-strength high-performance concrete; The strong high performance concrete of C100 superelevation is in development.And intensity is 90 MPa, 100 MPa, 110 MPa, 120 MPa, 150 MPa in the world, even the strong high performance concrete of the superelevation of 230MPa, in engineering, has all obtained to use.But, be based in above-mentioned research, application achievements major part that river sand preparation high-strength high-performance concrete produces.At present, preparing C90 level high-strength high-performance concrete in the prior art generally also is generally to adopt river sand or mixed sand as aggregate.Because river sand is valuable environmental resources, has the effect of water moisture self restraint, protection environment.If river sand resource is carried out overexploitation, both can cause the channel-bank slumping geologic hazard, again can to water surrounding along the river particularly groundwater environment damage.Therefore, existing employing river sand is made the technological or not ideal enough of C90 high performance concrete as aggregate, still can not satisfy and use and social requirement.
Summary of the invention
The objective of the invention is: provide a kind of employing mountain sand that does not destroy river sand resource and simple to operation, low preparation cost to prepare the method for C90 high performance concrete, to overcome the deficiency of prior art as aggregate.
The present invention be achieved in that employing of the present invention mountain sand as the C90 high performance concrete of aggregate preparation be by as the mountain sand of aggregate and rubble, as the cement of gelling material, add water as the breeze of composite blend and flyash and these 4 types of raw materials of polycarboxylic acid series high efficiency water reducing agent and be mixed with and form, the consumption of each raw material is calculated as by every cubic metre of shared weight in the finished product that is made into: cement 400～500kg/m
3, composite blend 100～200 kg/m
3, polycarboxylic acid series high efficiency water reducing agent (pulvis) 0.75～2.1kg/m
3, the water yield that adds is that water-cement ratio is 0.24～0.28, its surplus is the aggregate consumption by the ratio of water and gelling material.
In above-mentioned aggregate consumption, mountain sand accounts for 38%～42% of aggregate consumption, and its surplus is a rubble.
Above-mentioned mountain sand and rubble as aggregate should carry out compound in the ratio of following particle size range:
The rubble of 16～31.5mm particle size range: the rubble of 10～20mm particle size range: the rubble=4:3:3 of 5～10mm particle size range;
2.36 the mountain sand of～4.75 particle size range: the mountain sand=4:6 of 0～2.35 particle size range.
Aforementionedly be calculated as by every cubic metre of shared weight in the finished product that is made into: breeze 50～100 kg/m as the breeze of composite blend and the consumption of flyash
3, flyash 50～100 kg/m
3
Above-mentioned breeze is S95 or the above commodity slag powders of S95, and flyash is II level and above commodity flyash.
Above-mentioned cement is that grade is the ordinary Portland cement more than 42.5 or 42.5.
Owing to adopted technique scheme, the present invention to realize adopting mountain sand to prepare qualified C90 high-performance rock sand concrete as aggregate.The present invention finds in the process of the test that adopts mountain sand making C90 high performance concrete; Mountain sand and river sand facies ratio; Characteristics such as mountain sand ubiquity that fineness modulus is big, particle surface is coarse, corner angle are many, particle size range compound (or grating) bad; The concrete water requirement that these characteristics are prepared mountain sand is big, workability is poor slightly, be prone to produce the segregation bleeding, and this brings bigger difficulty to mountain sand preparation C90 high performance concrete; Simultaneously; Contain a certain amount of stone flour (particle diameter is less than 80 μ m) in the sand of mountain, in high-strength concrete, because gel material content is bigger; Slurry content is many, and the stone flour in the sand of mountain can make problems such as concrete mix viscosity increases, mobile decline, pumpability reduction occur.Can overcome above-mentioned difficulties effectively and avoid the generation of the problems referred to above through the resulting technical scheme of the present invention of lot of test, analysis, research and summary.Prove through lot of test, adopt the prepared C90 high performance concrete that obtains of the present invention can reach the technical indicator shown in the table 1:
Table 1 employing mountain sand is the technical indicator that the C90 high performance concrete of aggregate preparation reaches
| Sequence number | Project | Unit | Index |
| 1 | The slump | mm | ≥200 |
| 2 | Divergence | mm | ≥500 |
| 3 | 28d ultimate compression strength | MPa | ≥100 |
| 4 | Displacement flux (28d) | c | ≤1000? |
In sum, the present invention compared with prior art, the present invention not only has without river sand, can not destroy the advantage of river sand resource, but also has high, the advantages such as weather resistance is high, good workability of intensity of simple to operation, low preparation cost, product.The present invention has tangible comprehensive benefit at the aspects such as flexibility of engineering safety usage period, economic rationality, envrionment conditions, and meets the energy-saving and cost-reducing policy requirements of country fully.The present invention can be widely used in building fields such as bridge, road, Fang Jian.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed description.
Embodiments of the invention: adopting mountain sand is that aggregate is when preparing the C90 high performance concrete; Construct according to method of the present invention; Be about to this C90 high performance concrete by as the mountain sand of aggregate and rubble, as the cement of gelling material, add water as the breeze of composite blend and flyash and these 4 types of raw materials of polycarboxylic acid series high efficiency water reducing agent and be mixed with and form, the consumption of each raw material is calculated as by every cubic metre of shared weight in the finished product that is made into: cement 400～500kg/m
3, composite blend 100～200 kg/m
3, polycarboxylic acid series high efficiency water reducing agent (pulvis) 0.75～2.1kg/m
3, the water yield that adds is that water-cement ratio is 0.24～0.28, its surplus is the aggregate consumption by the ratio of water and gelling material; In the consumption of aggregate, mountain sand should account for 38%～42% of aggregate consumption, and its surplus can adopt common rubble; But mountain sand and rubble should carry out compound in the ratio of following particle size range:
The rubble of 20～31.5mm particle size range: the rubble of 10～20mm particle size range: the rubble=4:3:3 of 5～10mm particle size range; 2.36 the mountain sand of～4.75 particle size range: the mountain sand=4:6 of 0～2.35 particle size range;
As the breeze of composite blend and the consumption of flyash should be: breeze 50～100 kg/m by every cubic metre of shared weight in the finished product that is made into
3, flyash 50～100 kg/m
3Scope control;
Above-mentioned breeze can adopt S95 of the prior art or the above commodity slag powders of S95, and flyash is II level and above commodity flyash; It is the ordinary Portland cement more than 42.5 or 42.5 that its cement can directly adopt existing grade.
Claims (6)
1. method that adopts mountain sand to prepare the C90 high performance concrete as aggregate; It is characterized in that: this C90 high performance concrete by as the mountain sand of aggregate and rubble, as the cement of gelling material, add water as the breeze of composite blend and flyash and these 4 types of raw materials of polycarboxylic acid series high efficiency water reducing agent and be mixed with and form, the consumption of each raw material is calculated as by every cubic metre of shared weight in the finished product that is made into: cement 400～500kg/m
3, composite blend 100～200 kg/m
3, polycarboxylic acid series high efficiency water reducing agent (pulvis) 0.75～2.1kg/m
3, the water yield that adds is that water-cement ratio is 0.24～0.28 by the ratio of water and gelling material, its surplus is the aggregate consumption.
2. employing according to claim 1 mountain sand prepares the method for C90 high performance concrete as aggregate, and it is characterized in that: in mountain sand and rubble as the aggregate consumption, mountain sand accounts for 38%～42% of aggregate consumption, and its surplus is a rubble.
3. employing according to claim 1 and 2 mountain sand prepares the method for C90 high performance concrete as aggregate, and it is characterized in that: mountain sand and rubble as aggregate should carry out compound in the ratio of following particle size range:
The rubble of 16～31.5mm particle size range: the rubble of 10～20mm particle size range: the rubble=4:3:3 of 5～10mm particle size range;
2.36 the mountain sand of～4.75 particle size range: the mountain sand=4:6 of 0～2.35 particle size range.
4. employing according to claim 1 mountain sand prepares the method for C90 high performance concrete as aggregate, it is characterized in that: be calculated as by every cubic metre of shared weight in the finished product that is made into as the breeze of composite blend and the consumption of flyash: breeze 50～100 kg/m
3, flyash 50～100 kg/m
3
5. prepare the method for C90 high performance concrete according to claim 1 or 4 described employing mountain sand as aggregate, it is characterized in that: breeze is S95 or the above commodity slag powders of S95, and flyash is II level and above commodity flyash.
6. employing according to claim 1 mountain sand prepares the method for C90 high performance concrete as aggregate, and it is characterized in that: cement is that grade is the ordinary Portland cement more than 42.5 or 42.5.
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| CN 201010236540 CN102336541A (en) | 2010-07-26 | 2010-07-26 | Method for preparing C90 high-performance concrete by using mountain sand as aggregate |
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| CN 201010236540 CN102336541A (en) | 2010-07-26 | 2010-07-26 | Method for preparing C90 high-performance concrete by using mountain sand as aggregate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105330223A (en) * | 2015-12-03 | 2016-02-17 | 安徽省巢湖铸造厂有限责任公司 | Concrete and production method |
| CN105622000A (en) * | 2014-10-28 | 2016-06-01 | 贵州中建建筑科研设计院有限公司 | Preparation method of white carbon black-doped high performance concrete |
| CN113816675A (en) * | 2021-09-04 | 2021-12-21 | 浙江交工集团股份有限公司 | C80 high-performance concrete |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195531A (en) * | 2006-03-22 | 2008-06-11 | 西安建筑科技大学 | Concrete with strength grade of C90 for section steel concrete composite structure |
| CN101774224A (en) * | 2010-01-12 | 2010-07-14 | 中铁八局集团第三工程有限公司 | Method for producing energy-saving and environmentally-friendly concrete |
-
2010
- 2010-07-26 CN CN 201010236540 patent/CN102336541A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195531A (en) * | 2006-03-22 | 2008-06-11 | 西安建筑科技大学 | Concrete with strength grade of C90 for section steel concrete composite structure |
| CN101774224A (en) * | 2010-01-12 | 2010-07-14 | 中铁八局集团第三工程有限公司 | Method for producing energy-saving and environmentally-friendly concrete |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622000A (en) * | 2014-10-28 | 2016-06-01 | 贵州中建建筑科研设计院有限公司 | Preparation method of white carbon black-doped high performance concrete |
| CN105330223A (en) * | 2015-12-03 | 2016-02-17 | 安徽省巢湖铸造厂有限责任公司 | Concrete and production method |
| CN113816675A (en) * | 2021-09-04 | 2021-12-21 | 浙江交工集团股份有限公司 | C80 high-performance concrete |
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Application publication date: 20120201 |