CN101806118B - Hollow sea sand concrete component and preparation method - Google Patents

Hollow sea sand concrete component and preparation method Download PDF

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Publication number
CN101806118B
CN101806118B CN2010101163296A CN201010116329A CN101806118B CN 101806118 B CN101806118 B CN 101806118B CN 2010101163296 A CN2010101163296 A CN 2010101163296A CN 201010116329 A CN201010116329 A CN 201010116329A CN 101806118 B CN101806118 B CN 101806118B
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sand concrete
hollow
carbon dioxide
sea sand
marine
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CN101806118A (en
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查晓雄
于福涛
刘轶翔
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Shenzhen Graduate School Harbin Institute of Technology
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Shenzhen Graduate School Harbin Institute of Technology
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Abstract

The invention relates to a hollow sea sand concrete component, which comprises cement, water and sea sand, wherein the sea sand serves as concrete aggregate and is mixed with the cement and the water in certain proportion to form sea sand concrete. The hollow sea sand concrete component also comprises a columnar substrate which accommodates the sea sand concrete, wherein the sea sand concrete is poured into the columnar substrate to form a cylindrical hollow core attached to the inner wall of the columnar substrate, and is reacted with carbon dioxide to form the hollow sea sand concrete component after being formed in the columnar substrate. The sea sand concrete component of the invention is formed by reacting the sea sand concrete with the carbon dioxide, and the carbon dioxide and a hydration product calcium hydroxide of the cement undergo reaction to produce calcium carbonate which can improve a contact interface of the sea sand concrete aggregate and the cement paste, enhance the strength of the concrete and reduce holes of the concrete, so the durability of the sea sand concrete component is improved.

Description

Utilize the hollow sea sand concrete component and the preparation method of carbon dioxide preparation
Technical field
The present invention relates to a kind of concrete component and preparation method, relate in particular to and a kind ofly utilize extra large sand to make hollow sea sand concrete component and preparation method as concrete aggregate.
Background technology
Along with the development of society, all kinds of buildings and construction work are more and more, and concrete component is widely used in the post and foundation pile of tower structure, industrial premises and civilian construction.In coastal cities, common sandstone comparatively lacks, but has a large amount of extra large sand.Owing to contain a large amount of salinities in the extra large sand, corrosion failure steel easily, simultaneously, extra large sand is as basic matterial, and the chlorion of himself inside can reduce concrete intensity, and therefore, extra large sand is not being popularized in the building now.In the prior art, as building concrete, when utilizing extra large sand as concrete aggregate, its boundary strength will be lower than the boundary strength of natural aggregate, thereby causes the intensity of marine sand concrete to be lower than ordinary concrete intensity with extra large sand.Simultaneously, extra large sand is during as aggregate, and its interface hole will be more than the interface hole of natural aggregate, and this can make the durability of marine sand concrete will be lower than the durability of ordinary concrete.
Summary of the invention
The technical problem that the present invention solves is: extra large sand of the present invention mixes hollow native member and the preparation method of coagulating, and overcomes in the prior art, and when being made into marine sand concrete with extra large sand as aggregate, intensity is low, the technical problem that durability is low.
Technical scheme of the present invention is: make up a kind of hollow sea sand concrete component that utilizes the carbon dioxide preparation, comprise cement, water and extra large sand, described extra large sand mixes the formation marine sand concrete as concrete aggregate by a certain percentage with cement, water, also comprise the columnar shape basal of holding described marine sand concrete, described marine sand concrete pours into and forms the hollow inwall that is attached to described columnar shape basal of column in the described columnar shape basal, after described marine sand concrete is shaped, will form hollow sea sand concrete component behind described marine sand concrete and the carbon dioxide gas precursor reactant in described columnar shape basal.
Further technical scheme of the present invention is: described columnar shape basal is fibre-reinforced plastics (Fiberglass-Reinforced Plastics, fibre-reinforced plastics are called for short " FRP ") pipe.
Further technical scheme of the present invention is: it is hollow that the marine sand concrete in the described columnar shape basal forms column through centrifugal rotation.
Further technical scheme of the present invention is: when described marine sand concrete and carbon dioxide gas precursor reactant, and described column hollow seal.
Further technical scheme of the present invention is: put into dry ice during described column is hollow, carbon dioxide that generates behind the described dry ice sublimation and described marine sand concrete fully react.
Technical scheme of the present invention is: a kind of method of utilizing carbon dioxide to prepare hollow sea sand concrete component is provided, comprises the steps:
Preparation marine sand concrete: extra large sand is mixed the formation marine sand concrete as concrete aggregate by a certain percentage with cement, water;
It is hollow that marine sand concrete forms column: described marine sand concrete pours into and forms the hollow inwall that is attached to described columnar shape basal of column in the columnar shape basal;
Form hollow sea sand concrete component: described marine sand concrete and carbon dioxide are fully reacted.
Further technical scheme of the present invention is: form in the hollow step of column at marine sand concrete, it is hollow that the marine sand concrete in the described columnar shape basal forms column through centrifugal rotation.
Further technical scheme of the present invention is: in forming the hollow sea sand concrete component step, described marine sand concrete also is included in maintenance in the steam that is higher than normal pressure after being shaped in described columnar shape basal.
Further technical scheme of the present invention is: in forming the hollow sea sand concrete component step, put into dry ice at the column center of marine sand concrete, carbon dioxide that generates behind the described dry ice sublimation and described marine sand concrete fully react.
Further technical scheme of the present invention is: put into dry ice and make the column hollow pressure of described marine sand concrete reach critical condition in the column of described marine sand concrete is hollow: described critical condition is: pressure is greater than 7.4mpa, temperature is greater than 31 degrees centigrade, and described dry ice distils under described critical condition and produces supercritical carbon dioxide gas.
Technique effect of the present invention is: the present invention utilizes the hollow sea sand concrete component of carbon dioxide preparation, to form hollow sea sand concrete component behind marine sand concrete and the carbon dioxide gas precursor reactant, the hydrated product calcium hydroxide reaction of carbon dioxide and cement generates calcium carbonate, calcium carbonate can improve the contact interface of marine sand concrete aggregate and cement paste, strengthen concrete intensity, reduce pore fluid of concrete, thereby improve the durability of sea-sand concrete member.
Description of drawings
Fig. 1 is a section of structure of the present invention.
Fig. 2 is a flow chart of the present invention.
The specific embodiment
Below in conjunction with specific embodiment, technical solution of the present invention is further specified.
As shown in Figure 1, the specific embodiment of the present invention is: make up a kind of hollow sea sand concrete component, comprise cement, water and extra large sand, described extra large sand is as concrete aggregate and cement, water mixes formation marine sand concrete 2 by a certain percentage, also comprise the columnar shape basal 1 of holding described marine sand concrete 2, described marine sand concrete 2 pours into and forms the inwall that column hollow 3 is attached to described columnar shape basal 1 in the described columnar shape basal 1, after described marine sand concrete 2 is shaped, will form hollow sea sand concrete component behind described marine sand concrete 2 and the carbon dioxide gas precursor reactant in described columnar shape basal 1.Among the present invention, after described marine sand concrete 2 is shaped in described columnar shape basal 1, described marine sand concrete 2 and carbon dioxide is fully reacted the back form hollow sea sand concrete component.Because (chemical formula is Ca (OH) to contain a large amount of calcium hydroxides in the marine sand concrete 2 2), again marine sand concrete 2 and carbon dioxide are fully reacted, just calcium hydroxide and carbon dioxide reaction generate calcium carbonate, that is: Ca (OH) 2+ CO 2=CaCO 3+ H 2O, because calcium carbonate is mixed in the contact interface that can improve extra large sand and cement paste in the marine sand concrete 2, strengthen the intensity of marine sand concrete 2, reduce the hole of marine sand concrete 2, thereby improve the durability of marine sand concrete 2, improved the performance and the quality of the hollow sea sand concrete component made from this marine sand concrete so greatly.
In the specific embodiments of the invention, carbon dioxide is passed in the described column hollow 3, carbon dioxide infiltrates in the marine sand concrete 2 by hollow 3 walls of column, fully reacts with a large amount of calcium hydroxides in the marine sand concrete 2.Among the present invention, carbon dioxide is passed in the hollow sea sand concrete component by certain method, has reduced the Carbon Dioxide in Air gas purging, improved environment.In the specific embodiment of the invention, described columnar shape basal 1 is the FRP pipe.Forming column when hollow, pack into the amount fibrous root of described columnar shape basal of marine sand concrete 2 is determined according to the specific requirement of hollow 3 sizes of column.The described columnar shape basal 1 of marine sand concrete 2 of will packing into is put on the centrifuge rotates, and through rotation to a certain degree, the marine sand concrete 2 in the described columnar shape basal 1 is close to the inwall of described columnar shape basal 1, and marine sand concrete in be formed centrally column hollow 3.
As shown in Figure 1, preferred implementation of the present invention is: when described marine sand concrete 2 and carbon dioxide, hollow 3 sealings of described column so both can guarantee that marine sand concrete 2 and carbon dioxide fully react, and can not waste carbon dioxide again.Specific embodiments of the invention are: put into dry ice in the described column hollow 3, form the carbon dioxide of high pressure behind the described dry ice sublimation, it is more abundant that the carbon dioxide gas physical efficiency of high pressure is infiltrated carbon dioxide, and carbon dioxide and described marine sand concrete 2 can react more fully.
As shown in Figure 2, the specific embodiment of the present invention is: a kind of method for preparing hollow sea sand concrete component is provided, comprises the steps:
Step 100: preparation marine sand concrete 2: among the present invention, described extra large sand is mixed formation marine sand concrete 2 by a certain percentage as concrete aggregate and cement, water.
Step 200: it is hollow that marine sand concrete forms column: earlier the marine sand concrete 2 for preparing is poured in the columnar shape basal 1, pack into the amount fibrous root of described columnar shape basal of marine sand concrete 2 is determined according to the specific requirement of the hollow size of column.The described marine sand concrete 2 that will pour into again in the described columnar shape basal 1 forms the inwall that column hollow 3 is attached to described columnar shape basal 1.In the specific embodiments of the invention, the described columnar shape basal 1 of marine sand concrete 2 of will packing into is put on the centrifuge rotates, through rotation to a certain degree, the marine sand concrete 2 in the described columnar shape basal 1 is close to the inwall of described columnar shape basal 1, and marine sand concrete 2 in be formed centrally column hollow 3.
Step 300: form hollow sea sand concrete component: described marine sand concrete 2 is fully reacted with carbon dioxide, that is: after described marine sand concrete 2 is shaped in described columnar shape basal 1, described marine sand concrete 2 and carbon dioxide is fully reacted the back form hollow sea sand concrete component.Because (chemical formula is Ca (OH) to contain a large amount of calcium hydroxides in the marine sand concrete 2 2), again marine sand concrete 2 and carbon dioxide are fully reacted generation calcium carbonate, just calcium hydroxide and carbon dioxide reaction generate calcium carbonate, that is: Ca (OH) 2+ CO 2=CaCO 3+ H 2O, because calcium carbonate is mixed in the marine sand concrete 2 and can improves the contact interface of extra large sand as concrete aggregate and cement paste, strengthen the intensity of marine sand concrete 2, reduce the hole of marine sand concrete 2, improve the durability of marine sand concrete 2, thereby improve the performance and the quality of sea-sand concrete member.In the specific embodiment of the present invention, carbon dioxide is passed in the described column hollow 3, carbon dioxide infiltrates in the marine sand concrete 2 by hollow 3 walls of column, fully reacts with a large amount of calcium hydroxides in the marine sand concrete 2.In the specific embodiment of the invention, carbon dioxide is passed in the hollow sea sand concrete component by certain method, has reduced the Carbon Dioxide in Air gas purging, improved environment.
Preferred implementation of the present invention is: when described marine sand concrete 2 and carbon dioxide, hollow 3 sealings of described column so both can guarantee that marine sand concrete 2 and carbon dioxide fully react, and can not waste carbon dioxide again.Specific embodiments of the invention are: put into dry ice in the described column hollow 3, carbon dioxide that generates behind the described dry ice sublimation and described marine sand concrete 2 fully react.
Preferred implementation of the present invention is: in forming the hollow sea sand concrete component step, described marine sand concrete 2 also is included in maintenance in the steam that is higher than normal pressure after being shaped in described columnar shape basal 1.Be about to hollow sea sand concrete component and be positioned in the environment that is higher than normal pressure, carry out maintenance by the mode of heating again, can shorten the formation time of hollow sea sand concrete component like this, accelerate the formation of hollow sea sand concrete component.And in this stage, marine sand concrete 2 and carbon dioxide are fully reacted.
Preferred implementation of the present invention is: because the carbon dioxide (CO under the supercriticality 2) have the character of liquids and gases simultaneously, the calcium hydroxide (Ca (OH) of easier and hydrated cementitious product 2) reaction generation calcium carbonate (CaCO 3).In the specific embodiments of the invention, putting into dry ice in the column of described marine sand concrete 2 hollow 3 makes hollow 3 pressure of column of described marine sand concrete 2 reach critical condition, described critical condition is: pressure is greater than 7.4mpa, temperature is greater than 31 degrees centigrade, and described dry ice distils under described critical condition and produces supercritical carbon dioxide gas.Specifically, the pressure of how much controlling in the column hollow 3 by the dry ice quality reaches critical pressure, makes temperature reach critical-temperature by external heat again, that is, thereby make dry ice form carbonation process under the supercriticality.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.

Claims (10)

1. hollow sea sand concrete component that utilizes carbon dioxide preparation, comprise cement, water and extra large sand, described extra large sand mixes the formation marine sand concrete as concrete aggregate by a certain percentage with cement, water, also comprise the columnar shape basal of holding described marine sand concrete, described marine sand concrete pours into and forms the hollow inwall that is attached to described columnar shape basal of column in the described columnar shape basal, after described marine sand concrete is shaped, will form hollow sea sand concrete component behind described marine sand concrete and the carbon dioxide gas precursor reactant in described columnar shape basal.
2. according to the described hollow sea sand concrete component that utilizes the carbon dioxide preparation of claim 1, it is characterized in that described columnar shape basal is the fibre-reinforced plastics pipe.
3. according to the described hollow sea sand concrete component that utilizes the carbon dioxide preparation of claim 1, it is characterized in that it is hollow that the marine sand concrete in the described columnar shape basal forms column through centrifugal rotation.
4. according to the described hollow sea sand concrete component that utilizes the carbon dioxide preparation of claim 1, it is characterized in that, when described marine sand concrete and carbon dioxide gas precursor reactant, described column hollow seal.
5. according to the described hollow sea sand concrete component that utilizes the carbon dioxide preparation of claim 1, it is characterized in that put into dry ice during described column is hollow, carbon dioxide that generates behind the described dry ice sublimation and described marine sand concrete fully react.
6. a method of utilizing carbon dioxide to prepare hollow sea sand concrete component comprises the steps:
Preparation marine sand concrete: extra large sand is mixed the formation marine sand concrete as concrete aggregate by a certain percentage with cement, water;
It is hollow that marine sand concrete forms column: described marine sand concrete pours into and forms the hollow inwall that is attached to described columnar shape basal of column in the columnar shape basal;
Form hollow sea sand concrete component: described marine sand concrete and carbon dioxide are fully reacted.
7. according to the described method of utilizing carbon dioxide to prepare hollow sea sand concrete component of claim 5, it is characterized in that form in the hollow step of column at marine sand concrete, it is hollow that the marine sand concrete in the described columnar shape basal forms column through centrifugal rotation.
8. according to the described method of utilizing carbon dioxide to prepare hollow sea sand concrete component of claim 5, it is characterized in that, in forming the hollow sea sand concrete component step, described marine sand concrete also is included in maintenance in the steam that is higher than normal pressure after being shaped in described columnar shape basal.
9. according to the described method of utilizing carbon dioxide to prepare hollow sea sand concrete component of claim 5, it is characterized in that, in forming the hollow sea sand concrete component step, dry ice is put at column center at marine sand concrete, and carbon dioxide that generates behind the described dry ice sublimation and described marine sand concrete fully react.
10. according to the described method of utilizing carbon dioxide to prepare hollow sea sand concrete component of claim 9, it is characterized in that, putting into dry ice in the column of described marine sand concrete is hollow makes the column hollow pressure of described marine sand concrete reach critical condition: described critical condition is: pressure is greater than 7.4mpa, temperature is greater than 31 degrees centigrade, and described dry ice distils under described critical condition and produces supercritical carbon dioxide gas.
CN2010101163296A 2010-02-26 2010-02-26 Hollow sea sand concrete component and preparation method Active CN101806118B (en)

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101798854B (en) * 2010-02-26 2012-02-15 哈尔滨工业大学深圳研究生院 Hollow concrete member and preparation method thereof
CN102922598B (en) * 2012-10-29 2015-03-25 北京航空航天大学 Fabricating method of concrete preformed pile in saline soil region
CN104314232B (en) * 2014-10-22 2018-11-09 清华大学 Using the seawater corrosion resistance composite material combination column of seawater marine sand concrete
CN105386441A (en) * 2015-10-19 2016-03-09 广西大学 PVC pipe wrapped inner supporting cross prestress recycled concrete tubular pile
CN105386437A (en) * 2015-10-19 2016-03-09 广西大学 FRP wrapped recycled concrete composite tubular pile
CN105386442A (en) * 2015-10-19 2016-03-09 广西大学 FRP wrapped prestress recycled concrete tubular pile
CN107882271A (en) * 2017-10-17 2018-04-06 湖北工程学院 A kind of marine sand concrete superposed column using UHPC outsourcings
CN113429174B (en) * 2021-07-01 2022-05-06 石家庄铁道大学 Preparation method of selective internal exposure concrete capable of absorbing carbon dioxide

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CN87201968U (en) * 1987-02-11 1987-12-26 浙江省电力设计院 Steel pipe constructional element with a concrete layer inside by centrifuge shaping
CN1008461B (en) * 1985-03-05 1990-06-20 清水建设株式会社 Concrete filled steel tube column and method of constructing same
JP2002242366A (en) * 2001-02-22 2002-08-28 Kajima Corp Concrete-filled steel tube column, the column, and column connecting structure
CN2729150Y (en) * 2004-09-15 2005-09-28 蔡崇晓 Concrete placed hollow pile

Patent Citations (4)

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CN1008461B (en) * 1985-03-05 1990-06-20 清水建设株式会社 Concrete filled steel tube column and method of constructing same
CN87201968U (en) * 1987-02-11 1987-12-26 浙江省电力设计院 Steel pipe constructional element with a concrete layer inside by centrifuge shaping
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CN2729150Y (en) * 2004-09-15 2005-09-28 蔡崇晓 Concrete placed hollow pile

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