CN101935191B - High-strength concrete formula and preparation method thereof - Google Patents
High-strength concrete formula and preparation method thereof Download PDFInfo
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- CN101935191B CN101935191B CN 201010272640 CN201010272640A CN101935191B CN 101935191 B CN101935191 B CN 101935191B CN 201010272640 CN201010272640 CN 201010272640 CN 201010272640 A CN201010272640 A CN 201010272640A CN 101935191 B CN101935191 B CN 101935191B
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Abstract
The invention relates to a high-strength concrete and a preparation method thereof. The high-strength concrete formula is characterized by comprising the following raw materials in percentage by weight: 10-40 percent of cement, 1-10 percent of mineral powder, 10-65 percent of fine aggregate, 0-50 percent of rough aggregate, 1-10 percent of water reducing agent and 1-10 percent of water. The preparation method comprises the following steps of: putting all dry materials into a stirrer by the proportion and dry-mixing for 5-10min; adding water accounts for 60 percent in the total water weight into the stirrer and mixing the materials for 5-10min; uniformly mixing the water reducing agent and water accounts for accounting 30 percent in the total water weight and adding an obtained mixture into the stirrer; washing a container used for preparing the water reducing agent by using water accounts for accounting 10 percent in the total water weight, and adding liquid after washing into the stirrer; and stirring the mixture until the mixture is in a viscous state. By adopting the formula and the preparation method, the high-strength concrete with the compression strength of 125-270MPa is prepared, and different compression strengths are achieved through changing the grain size of the fine and rough aggregates, the type and the proportion of the cement. The high-strength concrete can be widely applied to high-strength construction of modern requirements.
Description
Technical field
The invention belongs to building material field, particularly strong concrete of a kind of ultimate compression strength 125MPa ~ 270MPa and preparation method thereof.
Background technology
Nearly twenty or thirty is over year, and concrete is always to hard, high-strength, lightweight soon, modification, compound, energy-conservation future development.High-strength concrete is as a kind of new material of construction, and the superiority high with its ultimate compression strength, that non-deformability is strong, density is large, porosity is low is widely used in high building structure, long-span bridge girder construction and some unique construction.The characteristics of high-strength concrete maximum are that ultimate compression strength is high, be generally mixed 4～6 times of doubting soil of regular tenacity, so optimum are used for Highrise buildings.In addition, utilize the large characteristics of high-strength concrete density, can be used as to build and withstand shocks and the buildings or structures of explosive load, as the atomic reactor basis etc.; Utilize the strong and strong characteristics of corrosion resistance of high-strength concrete anti-permeability performance, construction has the industrial pond etc. that high resistance blends high anticorrosive requirement.Up to the present, not yet see the report of 125MPa ~ 270MPa strong concrete.
Summary of the invention
The object of the invention is to overcome above-mentioned prior art Shortcomings, will have high resistance and blend high resistance corruption, high strength in order to satisfy modern building fabric, being engaged in for many years concrete development research and production practice exploitation through the contriver, a kind of ultimate compression strength is provided is strong concrete of 125MPa ~ 270MPa and preparation method thereof.
The strong concrete of ultimate compression strength 125MPa provided by the invention ~ 270MPa (abbreviation strong concrete) is characterized in that comprising that following component and weight percentage are mixed through stirring evenly forms:
The preparation method of the strong concrete of ultimate compression strength 125MPa provided by the invention ~ 270MPa comprises the following steps:
1. with each (component) dry material in above-mentioned strong concrete, cement, mineral powder, fine aggregate and coarse aggregate are put into stirrer by its weight percentage proportioning, are dry mixed 5-10 minute and mix;
2. add the water of total Water 60wt% in above-mentioned strong concrete in stirrer, batch mixing 5-10 minute;
3. the water of total Water 30wt% in whole water reducers and strong concrete is mixed in container clanging or clanking sound evenly after, add in stirrer;
4. rinse the container of preparation water reducer with the water of total Water 10wt% in above-mentioned strong concrete, the liquid after flushing adds in stirrer, then stirs the mixture, until that mixture becomes is thick, then builds according to the practice of construction needs.
In strong concrete provided by the invention and preparation method thereof, described strong concrete refers to that ultimate compression strength is at the strong concrete of 125MPa-270MPa, wherein can require to produce arbitrarily according to current building structure characteristics the high-strength concrete formula of each section, such as 125MPa intensity, 150MPa intensity, 150-170 or 160-170 or 170-200MPa intensity, 200-217 or 200-230MPa intensity, 240-270MPa intensity section or any high-strength concrete formula etc. of high strength section more.
Described cement is ordinary Portland cement, white cement or low alkali sulphate-resistant cement etc., along with ultimate compression strength (section) difference, preferred use various types of cement type trades mark, for example when ultimate compression strength be 125MPa-during less than 150MPa, cement preference employing ordinary Portland cement; Preferably adopt white cement for greater than 150MPa-240MPa the time when ultimate compression strength; Preferably adopt low alkali sulphate-resistant cement etc. during greater than 240MPa-270MPa when ultimate compression strength.
described mineral powder is inorganic nanometer powder, inorganic nanometer-powder refers to that main component is silicate, silicon-dioxide, aluminium sesquioxide, the mechanicals of silicon carbide etc. or byproduct, and wollastonite, grouan, it is nano level processed products that the lithotomes such as basalt are processed into particle dia, namely be referred to as inorganic nanometer-powder, wollastonite nano powder for example, the superfined flyash nano powder, alumina nano powder, the ground slag nano powder, the natural zeolite nano powder, levigate Wingdale nano powder or quartz sand nano powder etc., can be that single kind powder can be also with any ratio powder mixture, this this inorganic nanometer-powder is all the commercially available prod, also can be processed into voluntarily nano powder.
Described fine aggregate comprises sand or alumina (bauxitic clay) etc., wherein alumina particle dia: less than 4mm.Sand comprises three kinds of specification sands: fine sand (particle dia is less than 0.25mm), medium sand (particle dia 0.25-1mm), coarse sand (particle dia 1-4mm), three kinds of sands are that 0-1:1.5 to 2:3.5 mixes to 4 ratio and uses according to weight ratio.Along with the ultimate compression strength of high-strength concrete formula is different, use fine aggregate kind and usage ratio different, when ultimate compression strength was 125MPa-200MPa, fine aggregate preferably adopted sand (mixture); When ultimate compression strength is during greater than 200MPa to 270MPa, fine aggregate preferably adopts alumina etc.
Described coarse aggregate comprises stone or alumina, and the coarse aggregate particle dia is greater than 4mm to 16mm, and its consumption is that 0-50wt% refers to that when ultimate compression strength coarse aggregate preferably adopts stone during at 125MPa-150MPa; Do not use coarse aggregate during greater than 150MPa to 200MPa or greater than 240MPa to 270MPa when ultimate compression strength; During greater than 200MPa to 240MPa, coarse aggregate preferably adopts alumina when ultimate compression strength.
Described water reducer is normally used commercially available prod, present constructing concrete field, in this formula without particular requirement.
The characteristics of strong concrete provided by the invention and preparation thereof are to prepare the intensity that concrete is superelevation and (anti-permeability performance is strong and corrosion resistance is strong, the preparation method is simple, can adopt the normal concrete preparation method can prepare the intensity of superelevation, purposes is wide, be specially adapted to high building structure, long-span bridge girder construction and withstand shocks and the buildings or structures of explosive load in.
Embodiment
The present invention will further illustrate the present invention with lower routine embodiment, but protection scope of the present invention is not limited to the following example.
Embodiment 1
with commercially available ordinary Portland cement 4.8Kg, wollastonite nano powder 1.59Kg, particle dia is the medium sand 2.68Kg of 0.25-1mm less than the fine sand 0.68Kg particle dia of 0.25mm, particle dia is the coarse sand 6.78Kg of 1-4mm and less than each dry material of stone 13.8Kg of 16mm, put into stirrer and be dry mixed 5min, add the water of 0.72Kg to stir 5min in stirrer, water with the commercially available water reducer of 0.15Kg and 0.36Kg adds stirrer after mixing in molten device again, rinse simultaneously the container of preparation water reducer with the water of 0.12Kg, liquid after flushing adds stirrer, stir the mixture until it becomes thick, adopt standard concrete die trial vibrating forming, maintenance is after 28 days under standard conditions, ultimate compression strength is 125 ± 5MPa.
Embodiment 2
with white cement 6.33Kg, wollastonite nano powder 2.25Kg, the fine sand 2.67Kg of particle dia＜0.25mm, particle dia is the medium sand 4.83Kg of 0.25-1mm, particle dia is the coarse sand 9.69Kg of 1-4mm, superfined flyash nano powder 2.43Kg puts into stirrer and is dry mixed 5min, add the water of 0.81Kg to stir 5min in stirrer again, water mixing in container of the commercially available water reducer of 0.69Kg and 0.405Kg is added stirrer, rinse simultaneously the container of preparation water reducer with the water of residue 0.081Kg, liquid after flushing adds stirrer, stir the mixture until it becomes thick, adopt standard concrete die trial vibrating forming, maintenance is after 28 days under standard conditions, ultimate compression strength is 160 ± 5MPa.
Embodiment 3
with white cement 9.27Kg, wollastonite nano powder 2.22Kg, the fine sand 2.37Kg of particle dia＜0.25mm, particle dia is the medium sand 4.71Kg of 0.25-1mm, particle dia is each dry material of coarse sand 9.45Kg of 1-4mm, put into stirrer and be dry mixed 5min, add the water of 0.792Kg to stir 5min in stirrer, the water of commercially available water reducer 0.66Kg and 0.396Kg is added stirrer after mixing in container, rinse simultaneously the container of preparation water reducer with the water of residue 0.0792Kg, liquid after flushing adds stirrer, stir the mixture until it becomes thick employing standard concrete die trial vibrating forming, maintenance is after 28 days under standard conditions, ultimate compression strength is 170 ± 6MPa.
Embodiment 4
with white cement 6.27Kg, wollastonite nano powder 2.25Kg, the fine sand 2.77Kg of particle dia＜0.25mm, particle dia is the medium sand 6.8Kg of 0.25-1mm, particle dia is the coarse sand 15.6Kg of 1-4mm, each dry material, put into stirrer and be dry mixed 5min, add the water of 0.81Kg to stir 5min in stirrer, the water of commercially available water reducer 0.69Kg and 0.405Kg is added stirrer after mixing in container, rinse simultaneously the container of preparation water reducer with the water of residue 0.081Kg, liquid after flushing adds stirrer, stir the mixture until it becomes thick, adopt standard concrete die trial vibrating forming, maintenance is after 28 days under standard conditions, ultimate compression strength is 150 ± 5MPa.
Embodiment 5
with white cement 6.03Kg, wollastonite nano powder 2.22Kg, the fine sand 2.37Kg of particle dia＜0.25mm, particle dia is the medium sand 4.71Kg of 0.25-1mm, particle dia is the coarse sand 9.45Kg of 1-4mm, each dry material, put into stirrer and be dry mixed 5min, add the water of 0.792Kg to stir 5min in stirrer, the water of commercially available water reducer 0.66Kg and 0.396Kg is added stirrer after mixing in container, rinse simultaneously the container of preparation water reducer with the water of residue 0.0792Kg, liquid after flushing adds stirrer, stir the mixture until it becomes thick, adopt standard concrete die trial vibrating forming, maintenance is after 28 days under standard conditions, ultimate compression strength is 165 ± 5MPa.
Embodiment 6
with white cement 7.26Kg, wollastonite nano powder 1.44Kg, bauxitic clay (particle diameter is less than 4mm) 4.95Kg, bauxitic clay (each dry material of 14.88Kg of particle diameter＜4-10mm), put into stirrer and be dry mixed 5min, add the water of 0.81Kg to stir 5min in stirrer, the water of the commercially available water reducer of 0.12Kg and 0.405Kg is added stirrer after mixing in container, rinse simultaneously the container of preparation water reducer with the water of residue 0.081Kg, liquid after flushing adds stirrer, stir the mixture until it becomes thick, adopt standard concrete die trial vibrating forming, maintenance is after 28 days under standard conditions, ultimate compression strength is 217 ± 8MPa.。
Embodiment 7
to hang down alkali sulphate-resistant cement 8.088Kg, wollastonite nano powder 1.92Kg, bauxitic clay (each dry material of 18.2445Kg of particle diameter＜4mm), put into stirrer and be dry mixed 5min, add the water of 0.702Kg to stir 5min in stirrer, the water of the commercially available water reducer of 0.57Kg and 0.351Kg is added stirrer after mixing in container, rinse simultaneously the container of preparation water reducer with the water of residue 0.0702Kg, liquid after flushing adds stirrer, stir the mixture until it becomes thick, adopt standard concrete die trial vibrating forming, maintenance is after 28 days under standard conditions, ultimate compression strength is at 240 ~ 270MPa.
Claims (1)
1. the strong concrete of a ultimate compression strength 240MPa ~ 270MPa, is characterized in that being comprised of following component and weight percentage, is mixed through stirring and evenly makes:
Above-mentioned each component weight percentage summation is 100%;
Wherein, described cement is low alkali sulphate-resistant cement;
Described mineral powder is wollastonite nano powder, superfined flyash nano powder, alumina nano powder, ground slag nano powder, natural zeolite nano powder, levigate Wingdale nano powder or quartz sand nano powder, and these mineral powders are single powder or powder mixture of planting;
Described fine aggregate is that particle dia is less than the 4mm alumina.
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| CN 201010272640 CN101935191B (en) | 2010-09-03 | 2010-09-03 | High-strength concrete formula and preparation method thereof |
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| CN 201010272640 CN101935191B (en) | 2010-09-03 | 2010-09-03 | High-strength concrete formula and preparation method thereof |
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| CN101935191A CN101935191A (en) | 2011-01-05 |
| CN101935191B true CN101935191B (en) | 2013-06-26 |
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| CN102173685B (en) * | 2011-02-14 | 2013-02-06 | 中国铁道科学研究院铁道建筑研究所 | Cast-in-place beam concrete composition for quick tensioning |
| CN103132652A (en) * | 2013-01-15 | 2013-06-05 | 盐城工学院 | Prefabricating embedded spiral hopped column formwork core cast-in-place concrete column of and manufacturing method |
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| CN104045266B (en) * | 2014-07-08 | 2016-03-02 | 日照弗尔曼新材料科技有限公司 | Concrete admixture |
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| CN105948654A (en) * | 2016-05-12 | 2016-09-21 | 南通科达建材股份有限公司 | High-durability silicate concrete for dam |
| CN105967571A (en) * | 2016-05-13 | 2016-09-28 | 句容联众科技开发有限公司 | {0><}0{>Concrete for foundation construction |
| CN105948667A (en) * | 2016-05-16 | 2016-09-21 | 句容联众科技开发有限公司 | Concrete for steel works |
| CN106517930B (en) * | 2016-09-27 | 2018-04-20 | 湖北工业大学 | A kind of production technology of PFA High Performance Concrete of High Replacement Levels |
| CN108164217A (en) * | 2018-01-09 | 2018-06-15 | 郑州大学 | A kind of room temperature maintenance ultra-high performance concrete and preparation method thereof |
| CN110028282A (en) * | 2019-04-19 | 2019-07-19 | 卓匈新材料科技（上海）有限公司 | The self-dense type terrazzo of terrazzo slurry and its curing molding |
| CN110540391A (en) * | 2019-09-04 | 2019-12-06 | 佛山科学技术学院 | high-performance concrete and performance evaluation method thereof |
| CN111187036A (en) * | 2020-02-20 | 2020-05-22 | 建华建材（山西）有限公司 | High-strength concrete prepared from industrial tailings and preparation method thereof |
| CN111233417A (en) * | 2020-02-29 | 2020-06-05 | 北京古运混凝土有限公司 | Preparation process of high-strength concrete |
| CN113896478A (en) * | 2021-10-29 | 2022-01-07 | 山东城际轨道交通科技股份有限公司 | Ultrahigh-strength concrete and preparation method thereof |
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