CN104420580A - Precast hollow concrete member and preparation method thereof - Google Patents
Precast hollow concrete member and preparation method thereof Download PDFInfo
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- CN104420580A CN104420580A CN201310390412.6A CN201310390412A CN104420580A CN 104420580 A CN104420580 A CN 104420580A CN 201310390412 A CN201310390412 A CN 201310390412A CN 104420580 A CN104420580 A CN 104420580A
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Abstract
The invention discloses a precast hollow concrete member which comprises concrete formed by stirring and mixing concrete aggregate, cement and water. The precast hollow concrete member also comprises a columnar base containing the concrete, wherein the columnar base comprises a square steel pipe and a circular steel pipe; the square steel pipe is arranged on the outer side of the circular steel pipe in a sleeving manner; steel reinforcements are welded between the square steel pipe and the circular steel pipe; the concrete part is poured into a cavity between the square steel pipe and the circular steel pipe; the other part of the concrete is poured into the circular steel pipe to form a cylindrical hollow part which is attached to the inner wall of the circular steel pipe; the cylindrical hollow part is sealed; dry ice is added into the cylindrical hollow part; and carbon dioxide produced by sublimation of the dry ice is reacted with the concrete. The concrete and carbon dioxide are reacted to form the hollow concrete member, carbon dioxide and a hydration product calcium hydroxide of cement are reacted to produce calcium carbonate, the contact interface between the concrete aggregate and cement paste can be improved by the calcium carbonate, the strength of the concrete is enhanced, and the durability of the concrete is improved.
Description
Technical field
The present invention relates to a kind of prefabricated hollow concrete structural member and preparation method.
Background technology
Along with the development of society, all kinds of building and construction work get more and more, precast unit is widely used in construction work: as metallurgical industry, power industry, shipbuilding industry, machine-building also and industry or civilian construction etc., may be used for boiler component and send in the post of substation framework, mounting shop, single or multiple lift industrial premises, high level or Super High civilian construction and the structure such as highway and city arch bridge, in the post being also applied to tower bar structure, industrial premises and civilian construction and foundation pile.In construction work, in concrete component, concrete strength is higher, and its supporting role is better.In some special application fields, require the concrete component using high strength, like this, common concrete component is undesirable.
Summary of the invention
The object of the present invention is to provide a kind of prefabricated hollow concrete structural member and preparation method, with the technical problem that the intensity overcoming ordinary concrete component in prior art is not high.
The technology used in the present invention solution is:
A kind of prefabricated hollow concrete structural member, comprise concrete aggregate, cement and water are uniformly mixed the concrete of formation by a certain percentage, also comprise and hold described concrete columnar shape basal, described columnar shape basal comprises a rectangular steel tube and a round steel pipe, rectangular steel tube is enclosed within outside round steel pipe, welded reinforcement between rectangular steel tube and round steel pipe, described concrete parts pours in the cavity between rectangular steel tube and round steel pipe, described concrete remainder pours in round steel pipe and forms the inwall that cylindrical hollow is attached to round steel pipe, described cylindrical hollow sealing, dry ice is put in cylindrical hollow, the carbon dioxide generated after described dry ice sublimation and described concrete react.
Preferably, the part concrete poured into described in round steel pipe forms cylindrical hollow through centrifugal rotation.
Preferably, described cylindrical hollow adopts two end plates sealing.
Prepare a method for prefabricated hollow concrete structural member, comprise the steps:
A prepares concrete: concrete aggregate, cement, water are uniformly mixed formation concrete by a certain percentage;
B prepares columnar shape basal: be enclosed within outside round steel pipe by rectangular steel tube, and welds stiffener between rectangular steel tube with round steel pipe;
The filling concrete of c: described concrete parts pours in the cavity between rectangular steel tube and round steel pipe, described concrete remainder pours in round steel pipe and forms through centrifugal rotation the inwall that cylindrical hollow is attached to round steel pipe;
D stream curing: the columnar shape basal after penetration concrete winched in atmospheric steam curing pond, quietly stops 1 ~ 2h, is slowly warming up to 90 ~ 100 DEG C, maintenance 4 ~ 8h under normal pressure; And then enter autoclave and carry out high temperature steam curing, temperature is 180 ~ 200 DEG C, and saturated vapour pressure is 1.0Mpa, curing time 8 ~ 12h;
E forms hollow concrete member: after stream curing matrix cylindrical hollow in put into dry ice, then cylindrical hollow adopt two end plates sealing, the carbon dioxide generated after described dry ice sublimation and described concrete react.
Preferably, in described concrete cylindrical hollow, put into dry ice makes described concrete cylindrical hollow pressure reach critical condition, described critical condition is: pressure is more than or equal to 7.4mpa, temperature is more than or equal to 31 DEG C, and described dry ice distils generation supercritical carbon dioxide under critical conditions.
Advantageous Effects of the present invention is:
The present invention forms hollow concrete member by after concrete and carbon dioxide reaction, the hydrated product calcium hydroxide reaction of carbon dioxide and cement generates calcium carbonate, calcium carbonate can improve the contact interface of concrete aggregate and cement paste, the intensity of Concrete Structure, reduce concrete hole, thus improve concrete durability.
Accompanying drawing explanation
Fig. 1 is the structural representation of prefabricated hollow concrete structural member of the present invention.
Detailed description of the invention
As shown in Figure 1, a kind of prefabricated hollow concrete structural member, comprises the concrete 1 concrete aggregate, cement and water being uniformly mixed by a certain percentage formation, also comprises and holds described concrete columnar shape basal.Described columnar shape basal comprises rectangular steel tube 2 and a round steel pipe 3, and rectangular steel tube 2 is enclosed within outside round steel pipe 3, welded reinforcement 4 between rectangular steel tube 2 and round steel pipe 3.Described concrete parts pours in the cavity between rectangular steel tube and round steel pipe, and described concrete remainder pours in round steel pipe and forms through centrifugal rotation the inwall that cylindrical hollow 5 is attached to round steel pipe.Described cylindrical hollow adopts two end plates sealing, and in cylindrical hollow, put into dry ice, the carbon dioxide generated after described dry ice sublimation and described concrete react.
Prepare a method for prefabricated hollow concrete structural member, comprise the steps:
A prepares concrete: concrete aggregate, cement, water are uniformly mixed formation concrete by a certain percentage;
B prepares columnar shape basal: be enclosed within outside round steel pipe by rectangular steel tube, and welds stiffener between rectangular steel tube with round steel pipe;
The filling concrete of c: described concrete parts pours in the cavity between rectangular steel tube and round steel pipe, described concrete remainder pours in round steel pipe and forms through centrifugal rotation the inwall that cylindrical hollow is attached to round steel pipe;
D stream curing: the columnar shape basal after penetration concrete winched in atmospheric steam curing pond, quietly stops 1 ~ 2h, is slowly warming up to 90 ~ 100 DEG C, maintenance 4 ~ 8h under normal pressure; And then enter autoclave and carry out high temperature steam curing, temperature is 180 ~ 200 DEG C, and saturated vapour pressure is 1.0Mpa, curing time 8 ~ 12h;
E forms hollow concrete member: after stream curing matrix cylindrical hollow in put into dry ice, then cylindrical hollow adopt two end plates sealing, the carbon dioxide generated after described dry ice sublimation and described concrete react.
The above-mentioned method preparing prefabricated hollow concrete structural member, in described concrete cylindrical hollow, preferably put into dry ice makes described concrete cylindrical hollow pressure reach critical condition, described critical condition is: pressure is more than or equal to 7.4mpa, temperature is more than or equal to 31 DEG C, and described dry ice distils generation supercritical carbon dioxide under critical conditions.
The relevant technologies content do not addressed in aforesaid way is taked or uses for reference prior art to realize.
It should be noted that, under the instruction of this manual, any equivalents done by those skilled in the art, or obvious variant, all should within protection scope of the present invention.
Claims (5)
1. a prefabricated hollow concrete structural member, it is characterized in that, comprise concrete aggregate, cement and water are uniformly mixed the concrete of formation by a certain percentage, also comprise and hold described concrete columnar shape basal, described columnar shape basal comprises a rectangular steel tube and a round steel pipe, rectangular steel tube is enclosed within outside round steel pipe, welded reinforcement between rectangular steel tube and round steel pipe, described concrete parts pours in the cavity between rectangular steel tube and round steel pipe, described concrete remainder pours in round steel pipe and forms the inwall that cylindrical hollow is attached to round steel pipe, described cylindrical hollow sealing, dry ice is put in cylindrical hollow, the carbon dioxide generated after described dry ice sublimation and described concrete react.
2. a kind of prefabricated hollow concrete structural member according to claim 1, is characterized in that, described in the part concrete poured in round steel pipe form cylindrical hollow through centrifugal rotation.
3. a kind of prefabricated hollow concrete structural member according to claim 1, is characterized in that, described cylindrical hollow adopts two end plates sealing.
4. prepare a method for prefabricated hollow concrete structural member, it is characterized in that, comprise the steps:
A prepares concrete: concrete aggregate, cement, water are uniformly mixed formation concrete by a certain percentage;
B prepares columnar shape basal: be enclosed within outside round steel pipe by rectangular steel tube, and welds stiffener between rectangular steel tube with round steel pipe;
The filling concrete of c: described concrete parts pours in the cavity between rectangular steel tube and round steel pipe, described concrete remainder pours in round steel pipe and forms through centrifugal rotation the inwall that cylindrical hollow is attached to round steel pipe;
D stream curing: the columnar shape basal after penetration concrete winched in atmospheric steam curing pond, quietly stops 1 ~ 2h, is slowly warming up to 90 ~ 100 DEG C, maintenance 4 ~ 8h under normal pressure; And then enter autoclave and carry out high temperature steam curing, temperature is 180 ~ 200 DEG C, and saturated vapour pressure is 1.0Mpa, curing time 8 ~ 12h;
E forms hollow concrete member: after stream curing matrix cylindrical hollow in put into dry ice, then cylindrical hollow adopt two end plates sealing, the carbon dioxide generated after described dry ice sublimation and described concrete react.
5. a kind of method preparing prefabricated hollow concrete structural member according to claim 4, it is characterized in that, in described concrete cylindrical hollow, put into dry ice makes described concrete cylindrical hollow pressure reach critical condition, described critical condition is: pressure is more than or equal to 7.4mpa, temperature is more than or equal to 31 DEG C, and described dry ice distils generation supercritical carbon dioxide under critical conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310390412.6A CN104420580A (en) | 2013-09-02 | 2013-09-02 | Precast hollow concrete member and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310390412.6A CN104420580A (en) | 2013-09-02 | 2013-09-02 | Precast hollow concrete member and preparation method thereof |
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| CN104420580A true CN104420580A (en) | 2015-03-18 |
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| CN201310390412.6A Pending CN104420580A (en) | 2013-09-02 | 2013-09-02 | Precast hollow concrete member and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222371A (en) * | 2018-01-26 | 2018-06-29 | 华侨大学 | A kind of assembly concrete-filled steel tube coupled column and joining method |
| CN108643387A (en) * | 2018-06-26 | 2018-10-12 | 温州大学 | The method of extremely beautiful nurse's bacteria microorganism microbial inoculum intensifying regenerating aggregate heat-preserving wall |
| CN111805710A (en) * | 2020-07-23 | 2020-10-23 | 杨阳 | Recycled concrete segment hollow square column mold and using method thereof |
| CN112411872A (en) * | 2020-11-16 | 2021-02-26 | 山东国铭球墨铸管科技有限公司 | Method for manufacturing environment-friendly engineering column beam by adopting nodular cast iron pipe waste |
| CN113500687A (en) * | 2021-05-26 | 2021-10-15 | 天应(深圳)生态建材科技有限公司 | Method for curing magnesium-based cement concrete product and special system |
| US11358304B2 (en) * | 2019-12-10 | 2022-06-14 | Carbicrete Inc | Systems and methods for curing a precast concrete product |
-
2013
- 2013-09-02 CN CN201310390412.6A patent/CN104420580A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222371A (en) * | 2018-01-26 | 2018-06-29 | 华侨大学 | A kind of assembly concrete-filled steel tube coupled column and joining method |
| CN108222371B (en) * | 2018-01-26 | 2023-11-21 | 华侨大学 | Assembled steel pipe concrete composite column and splicing method |
| CN108643387A (en) * | 2018-06-26 | 2018-10-12 | 温州大学 | The method of extremely beautiful nurse's bacteria microorganism microbial inoculum intensifying regenerating aggregate heat-preserving wall |
| US11358304B2 (en) * | 2019-12-10 | 2022-06-14 | Carbicrete Inc | Systems and methods for curing a precast concrete product |
| US20220234247A1 (en) * | 2019-12-10 | 2022-07-28 | Carbicrete Inc. | Systems and methods for curing a precast concrete product |
| US11999076B2 (en) * | 2019-12-10 | 2024-06-04 | Carbicrete Inc | Systems and methods for curing a precast concrete product |
| CN111805710A (en) * | 2020-07-23 | 2020-10-23 | 杨阳 | Recycled concrete segment hollow square column mold and using method thereof |
| CN112411872A (en) * | 2020-11-16 | 2021-02-26 | 山东国铭球墨铸管科技有限公司 | Method for manufacturing environment-friendly engineering column beam by adopting nodular cast iron pipe waste |
| CN112411872B (en) * | 2020-11-16 | 2022-03-22 | 国铭铸管股份有限公司 | Method for manufacturing environment-friendly engineering column beam by adopting nodular cast iron pipe waste |
| CN113500687A (en) * | 2021-05-26 | 2021-10-15 | 天应(深圳)生态建材科技有限公司 | Method for curing magnesium-based cement concrete product and special system |
| CN113500687B (en) * | 2021-05-26 | 2022-09-20 | 天应(深圳)生态建材科技有限公司 | Method for curing magnesium-based cement concrete product and special system |
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Application publication date: 20150318 |