CN108424088A - Self-compaction clear-water concrete and its construction method for bridge prefabrication pier stud - Google Patents
Self-compaction clear-water concrete and its construction method for bridge prefabrication pier stud Download PDFInfo
- Publication number
- CN108424088A CN108424088A CN201810558167.8A CN201810558167A CN108424088A CN 108424088 A CN108424088 A CN 108424088A CN 201810558167 A CN201810558167 A CN 201810558167A CN 108424088 A CN108424088 A CN 108424088A
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- CN
- China
- Prior art keywords
- pier stud
- self
- concrete
- bridge prefabrication
- clear
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
Abstract
The invention discloses the self-compaction clear-water concretes and its construction method for bridge prefabrication pier stud, the concrete can automatic filling template under the effect of gravity, with preferable mobility, education resistance and caking property, filling intensity can be reduced and intensity of vibrating, reduce concreting manipulation strength, the advantages that improving the work efficiency of concreting, appearance luster is almost the same after concrete formation, apparent bubble is few and disperses, and meets the appearance requirement of clear-water concrete；Unique match ratio of the present invention makes the present invention be suitable for the bridge prefabrication pier stud that height is high, section is big, reinforcing bar density is big, shape is special, the great value promoted the use of；Construction method in the present invention is suitable for our unique self-compaction clear-water concrete, and can exclude the bubble of inside concrete as far as possible using of the invention vibrate；Different divergences are taken, are sequentially reduced from the bottom up, it in this way can be in the laitance thickness for reducing pier stud top, to ensure the quality at each position of pier stud.
Description
Technical field
The invention belongs to construction material technical fields, and in particular to a kind of self-compaction for bridge prefabrication pier stud is clear
Water coagulation soil and its construction method.
Background technology
Currently, in bridge construction, pier stud precast assembly can shorten project entirety work as a kind of new construction technology
Phase mitigates construction site traffic pressure, reduces field service expense input, improves Engineering Quality Control so that engineering is more environmentally friendly,
Fast.
Bridge prefabrication pier stud using general concrete and of general construction method as made, then because of pier stud
The reasons such as height is high, section is big, reinforcing bar density is big, shape is special, may result in and occur excessive gas inside the pier stud of making
Bubble, there is situations such as voids and pits in surface.
The characteristics of self-compaction clear-water concrete existing self-compacting concrete, and have the exterior decorative effect of clear-water concrete,
It is a kind of novel green concrete be convenient for construction and there is Natural decoration effect.《Self-compacting concrete application technology regulation》
(CECS203:2006) it is with high fluidity to the definition of self-compacting concrete in, do not isolate, uniform stability, without shakes
It smashes and reaches closely knit, the concrete poured by dead weight flowing.Self-compact concrete in construction method is easy, of fine quality and can reduce labour
The features such as power, so that self-compacting concrete is fast-growth, and application field is wide.
Self-compaction clear-water concrete in the prior art, because of the difference of the proportioning difference or added material that respectively use
So that respective application field is different, either it is applied to house and builds or be applied to road construction, with bridge prefabrication pier stud
It compares, the concreting scale of construction is different, reinforcing bar density is different, shape also differs, therefore needs to develop a kind of be applicable in now
In the self-compaction clear-water concrete and its construction method of bridge prefabrication pier stud.
Invention content
The purpose of the present invention is that solve the above-mentioned problems and provides the self-compaction clear water for bridge prefabrication pier stud
Concrete.
The present invention is achieved through the following technical solutions above-mentioned purpose：
For the self-compaction clear-water concrete of bridge prefabrication pier stud, the match ratio of the concrete is：
Concrete configures technical parameter：Water-cement ratio is 0.34-0.38, sand coarse aggregate ratio 45%-55%.
Specifically, stone includes the first building stones and second of building stones；The first building stones is the rubble that grain size is 5-16mm, the
A kind of match ratio of building stones is 590kg/m3；Second of building stones is the rubble that grain size is 5-25mm, the match ratio of second of building stones
For 300kg/m3。
Specifically, the apparent density of the first building stones is 2740kg/m3, bulk density 1490kg/m3, porosity is
46%；The apparent density of second of building stones is 2740kg/m3, bulk density 1510kg/m3, porosity 45%.
Specifically, admixture is I grade of flyash.
Specifically, cement is the Portland cement that strength grade is 42.5MPa.
Specifically, additive is high performance water reducing agent of polyocarboxy acid.
Specifically, the apparent density of sand is 2700kg/m3, bulk density 1640kg/m3, porosity 39%.
Preferably, in the match ratio of the concrete：
The construction method of self-compaction clear-water concrete for bridge prefabrication pier stud, includes the following steps：
One, mold is selected, using high-precision light-weight mold, the assembled fissure of displacement between mold is no more than 2mm, keeps mold
Panel is smooth, and template paint is sprayed with without raised or sunken, and using spray pattern；
Two, concreting is taken different divergences, is sequentially reduced from the bottom up, divergence ensure 500mm~
580mm；Using 50 type vibrating spears, and it is responsible for vibrating by special messenger, is pulled out slowly using being inserted soon when vibrating spear, height of vibrating is 1.4 to 1.6
Between rice；The total time that each stick stops in concrete is no more than 100 seconds, per 0.5 meter of stick interval.
The beneficial effects of the present invention are：
The self-compaction clear-water concrete and its construction method for bridge prefabrication pier stud of the present invention, the concrete can be in weights
Automatic filling template under force effect has preferable mobility, education resistance and caking property, can reduce filling intensity and vibrate strong
Degree, reduces concreting manipulation strength, the advantages that improving the work efficiency of concreting, and appearance luster is basic after concrete formation
Unanimously, apparent bubble is few and disperses, and meets the appearance requirement of clear-water concrete；Unique match ratio of the present invention makes this hair
Bright bridge prefabrication pier stud high suitable for height, section is big, reinforcing bar density is big, shape is special, the great value promoted the use of；This
Construction method in invention is suitable for our unique self-compaction clear-water concrete, and is vibrated and can be arranged as far as possible using the present invention
Except the bubble of inside concrete；Different divergences are taken, are sequentially reduced from the bottom up, it in this way can be in the laitance for reducing pier stud top
Thickness, to ensure the quality at each position of pier stud.
Specific implementation mode
The present invention is achieved through the following technical solutions above-mentioned purpose：
For the self-compaction clear-water concrete of bridge prefabrication pier stud, the match ratio of the concrete is：
Concrete configures technical parameter：Water-cement ratio is 0.34-0.38, sand coarse aggregate ratio 45%-55%.
Stone includes the first building stones and second of building stones；The first building stones is the rubble that grain size is 5-16mm, the first stone
The match ratio of material is 590kg/m3；Second of building stones is the rubble that grain size is 5-25mm, and the match ratio of second of building stones is
300kg/m3。
The apparent density of the first building stones is 2740kg/m3, bulk density 1490kg/m3, porosity 46%；Second
The apparent density of kind building stones is 2740kg/m3, bulk density 1510kg/m3, porosity 45%.
Admixture is I grade of flyash.
Cement is the Portland cement that strength grade is 42.5MPa.
Additive is high performance water reducing agent of polyocarboxy acid.
The apparent density of sand is 2700kg/m3, bulk density 1640kg/m3, porosity 39%.
The construction method of self-compaction clear-water concrete for bridge prefabrication pier stud, includes the following steps：
One, mold is selected, using high-precision light-weight mold, the assembled fissure of displacement between mold is no more than 2mm, keeps mold
Panel is smooth, and template paint is sprayed with without raised or sunken, and using spray pattern；
Two, concreting is taken different divergences, is sequentially reduced from the bottom up, divergence ensure 500mm~
580mm；Using 50 type vibrating spears, and it is responsible for vibrating by special messenger, is pulled out slowly using being inserted soon when vibrating spear, height of vibrating is 1.4 to 1.6
Between rice；The total time that each stick stops in concrete is no more than 100 seconds, per 0.5 meter of stick interval.
Embodiment：
Prefabricated stand column is made using the present invention, design strength grade is C40 self-compactions, is stirred using machine, and machine vibrates,
And establishing criteria：JGJ55-2011；
The match ratio of the concrete of use is as follows：
Wherein：Water-cement ratio 0.36, sand coarse aggregate ratio 52%, 5 degrees Celsius -35 degrees Celsius of Applicable temperature；
Shown in the following table of raw material property and test result and remarks arrived employed in experiment：
Each index in test result obtained by the present embodiment is better than the prior art.Concrete appearance color and luster one after form removal
It causes, cinerous is presented, can't see bubble, no trace and powder phenomenon-tion, free from flaw in visual range, no open defect reaches clear
The appearance of water coagulation soil.
After the completion of pouring, temperature can continue to rise the concrete of the present invention, after 15 hours, reach maximum temperature, then
Slowly decline.Control of the present invention for temperature is the flyash added in concrete mix compared with high additive, mainly
The heat of hydration is reduced, later strength, less crack risk are enhanced.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appending claims and equivalents circle
It is fixed.
Claims (9)
1. the self-compaction clear-water concrete for bridge prefabrication pier stud, which is characterized in that the match ratio of the concrete is：
Concrete configures technical parameter：Water-cement ratio is 0.34-0.38, sand coarse aggregate ratio 45%-55%.
2. the self-compaction clear-water concrete according to claim 1 for bridge prefabrication pier stud, it is characterised in that：Stone includes
The first building stones and second of building stones；The first building stones is the rubble that grain size is 5-16mm, and the match ratio of the first building stones is
590kg/m3；Second of building stones is the rubble that grain size is 5-25mm, and the match ratio of second of building stones is 300kg/m3。
3. the self-compaction clear-water concrete according to claim 2 for bridge prefabrication pier stud, it is characterised in that：The first
The apparent density of building stones is 2740kg/m3, bulk density 1490kg/m3, porosity 46%；Second building stones it is apparent close
Degree is 2740kg/m3, bulk density 1510kg/m3, porosity 45%.
4. the self-compaction clear-water concrete according to claim 1 for bridge prefabrication pier stud, it is characterised in that：Admixture
For I grade of flyash.
5. the self-compaction clear-water concrete according to claim 1 for bridge prefabrication pier stud, it is characterised in that：Cement is
Strength grade is the Portland cement of 42.5MPa.
6. the self-compaction clear-water concrete according to claim 1 for bridge prefabrication pier stud, it is characterised in that：Additive
For high performance water reducing agent of polyocarboxy acid.
7. the self-compaction clear-water concrete according to claim 1 for bridge prefabrication pier stud, it is characterised in that：The table of sand
Sight density is 2700kg/m3, bulk density 1640kg/m3, porosity 39%.
8. the self-compaction clear-water concrete according to claim 1 for bridge prefabrication pier stud, which is characterized in that the coagulation
In the match ratio of soil：
9. the construction party according to claim 1-8 any one of them for the self-compaction clear-water concrete of bridge prefabrication pier stud
Method, which is characterized in that include the following steps：
One, mold is selected, using high-precision light-weight mold, the assembled fissure of displacement between mold is no more than 2mm, keeps mold panel
It is smooth, it is sprayed with template paint without raised or sunken, and using spray pattern；
Two, concreting is taken different divergences, is sequentially reduced from the bottom up, and divergence ensures in 500mm~580mm；It adopts
With 50 type vibrating spears, and it is responsible for vibrating by special messenger, is pulled out slowly using being inserted soon when vibrating spear, between height of vibrating is 1.4 to 1.6 meters；
The total time that each stick stops in concrete is no more than 100 seconds, per 0.5 meter of stick interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810558167.8A CN108424088A (en) | 2018-06-01 | 2018-06-01 | Self-compaction clear-water concrete and its construction method for bridge prefabrication pier stud |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810558167.8A CN108424088A (en) | 2018-06-01 | 2018-06-01 | Self-compaction clear-water concrete and its construction method for bridge prefabrication pier stud |
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| CN108424088A true CN108424088A (en) | 2018-08-21 |
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| CN201810558167.8A Pending CN108424088A (en) | 2018-06-01 | 2018-06-01 | Self-compaction clear-water concrete and its construction method for bridge prefabrication pier stud |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074754A (en) * | 2020-01-06 | 2020-04-28 | 中铁六局集团有限公司 | Pier column bare concrete construction method and pier column |
| CN113501680A (en) * | 2021-06-26 | 2021-10-15 | 苏州建国建筑工业有限公司 | High-performance fair-faced concrete and preparation method of prefabricated part thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102690089A (en) * | 2012-06-13 | 2012-09-26 | 江苏建筑职业技术学院 | Self-compaction fair-faced concrete with strength grade of C50 |
-
2018
- 2018-06-01 CN CN201810558167.8A patent/CN108424088A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102690089A (en) * | 2012-06-13 | 2012-09-26 | 江苏建筑职业技术学院 | Self-compaction fair-faced concrete with strength grade of C50 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074754A (en) * | 2020-01-06 | 2020-04-28 | 中铁六局集团有限公司 | Pier column bare concrete construction method and pier column |
| CN111074754B (en) * | 2020-01-06 | 2021-06-29 | 中铁六局集团有限公司 | Pier column bare concrete construction method and pier column |
| CN113501680A (en) * | 2021-06-26 | 2021-10-15 | 苏州建国建筑工业有限公司 | High-performance fair-faced concrete and preparation method of prefabricated part thereof |
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Application publication date: 20180821 |