CN106545165B - A kind of early strong anticracking anti-freezing method of concrete floor winter construction - Google Patents
A kind of early strong anticracking anti-freezing method of concrete floor winter construction Download PDFInfo
- Publication number
- CN106545165B CN106545165B CN201610969206.4A CN201610969206A CN106545165B CN 106545165 B CN106545165 B CN 106545165B CN 201610969206 A CN201610969206 A CN 201610969206A CN 106545165 B CN106545165 B CN 106545165B
- Authority
- CN
- China
- Prior art keywords
- concrete
- water
- floor
- early
- added
- Prior art date
- 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.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to technical field of concrete construction, and in particular to a kind of early strong anticracking anti-freezing method of concrete floor winter construction.The present invention is after concrete mix carries out floor casting, it lays bricks in floor surrounding or with other materials enclosing, prepares curing water in a reservoir, the curing water is that accelerating component or accelerating component and antifreezing component are added into tap water, and maintenance water immersion floor is kept, it conserves at least seven days.The present invention changes the adding manner of early strength agent, improves the early concrete intensity under cryogenic conditions, has no adverse effects to physical and mechanical properties such as later strengths.
Description
Technical field
The invention belongs to technical field of concrete construction, and in particular to a kind of early strong anticracking of concrete floor winter construction is anti-
The method of jelly.
Background technique
The concrete floor slab placement of concrete steel building, especially in temperature lower winter, the intensity of floorslab concrete increases
It is long that slowly for various reasons, the phenomenon that concrete floor cracks is a great problem in construction than more prominent, in order to
The early strength for improving concrete is typically employed in the method that early strength agent is mixed in concrete, but after mixing early strength agent, coagulation
The slump-loss of soil is very fast, if haul distance is farther out, some unpredictable factors is added, it occur frequently that the residence time is too long
Situation, some residence times are even longer up to four, five hours.In this case since concrete slump is too small, often
The slump of concrete can be increased using inappropriate methods such as water are added, it is very unfavorable that this generates the construction quality of concrete
Influence.
Early strength agent (there are commonly sodium sulphate, triethanolamines etc.) is added in concrete mix, in the lower feelings of temperature
Also be difficult to fully meet early strong demand under condition, if nocturnal temperature bust to 0 DEG C hereinafter, concrete can also frostbite, these factors
Floorslab concrete will be caused to crack.
Summary of the invention
For, there are problem, the present invention provides a kind of concrete building in low temperature season reinforced concrete floor casting process
The early strong anticracking anti-freezing method of plate winter construction, it is therefore an objective to by the way that accelerating component and antifreezing component are added in curing water, make to support
Accelerating component in shield water gradually penetrates into inside concrete and achievees the effect that morning is strong, and antifreezing component reduces the ice of curing water
Point, to realize the early-strength anti-freezing of winter construction.
Realize that the technical solution of the object of the invention follows the steps below:
(1) coarse-fine aggregate, sand, cement, mine are separately added into according to the concrete mix of setting after metering in mixing plant
Object additive, additive, stir evenly with water；
(2) early strength agent is added according to the 0~50% of setting value weight in concrete；
(3) floor concrete pours, vibrates, plasters；
(4) enclosing is built in the floor surrounding poured, forms the condition of water storing conservation；
(5) early strength agent being added in concrete mix, i.e. the 50~100% of setting value are added in curing water, match
Maintenance aqueous solution is made；
(6) maintenance aqueous solution is pumped on floor concrete, carries out water storing conservation.
The floorslab concrete is by the way of water storing conservation, at least seven days, the accelerating component for conserving aqueous solution is made to have foot
The enough time is to inside concrete diffusion mobility.
The early strength agent is triethanolamine soluble easily in water, sodium sulphate or the two mixture, weight in water
Concentration range is 0.03~3.5%.
In 3 DEG C of low temperature season of temperature <, or the season for thering is cold current to arrive, antifreezing component is added in curing water, is prevented
Freeze component account for curing water weight concentration be 10~50%, the antifreezing component be diffluent sodium nitrite, sodium sulfite or
Calcium nitrite, weight concentration range in water is 0~50%.
Compared with prior art, the features of the present invention and beneficial effect are:
(1) present invention is in the concrete mix of mixing plant production, is not added or less plus early strength agent, can be avoided in this way or
The problem of reducing the concrete slump loss because caused by being added early strength agent；
(2) currently used concrete early strength agent is by accelerating component (triethanolamine, sodium sulphate etc.), carrier, water-reducing agent
It is formulated, volume is also big, simple and convenient as long as the present invention takes its accelerating component to be added in curing water；The present invention is to add
Enter curing water of the aqueous solution as floor of early strength agent, the early strength agent component in curing water is spread into concrete at this time, is played
Improve the effect of early strength of concrete, that is to say, that original early strength agent is added and (is inside mixed) in concrete batching be changed to mix
Solidifying soil is external after pouring to penetrate into, and can overcome the problems, such as the slump-loss because of caused by early strength agent in this way；
(3) can be used as the various types of accelerating component, dosage is also different, need according to material source, price etc. it is many because
Element is determined by test, is measured content in curing water when necessary and is analyzed and determined again, to adjust, early strength agent in the present invention
The complex accelerator of triethanolamine and sodium sulphate or both, the accelerating component concentration in curing water due to inside concrete not
Disconnected scattering and permeating and decline, while being also concentrated because moisture evaporates, therefore concentration model of the early strength agent in curing water in the present invention
Enclose is 0.03%~3.5%；
(4) in 3 DEG C of temperature < of low temperature season, or the season for thering is cold current to arrive, it is added in the curing water of floor anti-
Freeze component, maintenance water concentration is 10~50%, to reduce the freezing point of water, concrete can be allow to exist depending on temperature condition
Even remain to continue aquation under low temperature under subzero temperature, some early strength agent also have effects that it is antifreeze, it is also contemplated that concrete performance shadow
It rings, reasonably selects；
(5) present invention can be according to the characteristics of construction site and condition is flexible to the additional amount of accelerating component and antifreezing component
It adjusts, the concentration in curing water can be increased by increasing dosage, and reduce dosage i.e. with the curing water of low concentration or with tap water come dilute
It releases, takes the present invention, promote concrete that can normally harden, while also thering are enough curing waters to cover, play the adjustment effect of temperature,
The generation of cracks on floor slab can preferably be avoided；
(6) present invention changes the adding manner of concrete early strength agent, by changing the rheology of concrete, makes coagulation
Earth mixtures keeps good flow regime before pouring construction, better meets the mobility requirement to concrete；
(7) to again plus accelerating component is improper, be added behind building site it is general in concrete all use early strength agent, that is, have water-reducing agent,
The components such as early strength agent and carrier are formulated, and dosage is big, and bad operation, the present invention changes the adding manner of early strength agent,
It remains to improve the early concrete intensity under cryogenic conditions, have no adverse effects to physical and mechanical properties such as later strengths.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described, it should be understood that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
Embodiment 1
Certain Step section, every floor plate suqare 987.9m2, subscribe C30 commerical ready-mixed concrete 250m3, at that time temperature be 5~
10 DEG C, concrete haul distance 17km, heavy traffic on the way needs 40~80 minutes from concrete mixing plant to construction site.
The early strong anticracking anti-freezing method of the concrete floor winter construction of the present embodiment follows the steps below:
(1) sodium sulphate early strength agent has been added in commerical ready-mixed concrete, the dosage for converting into sodium sulphate is cement weight in concrete
Amount 0.3%, belongs to low-dosage；
(2) it after concrete floor pours, lays bricks water blocking in surrounding, nearby has 15m3One, water tank, to match Sulphuric acid
The maintenance aqueous solution that sodium weight concentration is 3%, is pumped on floorslab concrete, water storage height 12mm after floorslab concrete final set,
And kept for 7 days, late maintaining uses ordinary tap water.
Embodiment 2
Certain three layers of workshop, every floor plate suqare 2130m2, have subscribed to the common pumped commercial concrete 640m of C353, haul distance is
25km, about needs 60~80 minutes, at that time 4~8 DEG C of temperature, unused early strength agent component in concrete batching；
After concreting completion, lays bricks a grade water in floor surrounding, have 15m3One, water tank, prepare triethanolamine quality
The maintenance aqueous solution that concentration is 0.05% as the curing water of floorslab concrete, water storage 1~1.2cm of height, and is kept for 7 days, after
Tap water is used in phase maintenance.
Embodiment 3
Certain high-storey business, every floor plate suqare 1500m2, have subscribed 350m3Pump concrete, temperature was 3~7 at that time
DEG C, concrete haul distance be 26km, due to construction be located in downtown, traffic jam is serious, from mixing plant to building site need 1.5 hours with
On, in concrete not plus early strength agent component, in floor concrete casting, with a thickness of 3cm plank by surrounding fence up to
Water blocking, building site have 15m3One, water tank, the mixing to prepare 0.02% triethanolamine of weight concentration and 3% sodium sulphate is molten
Curing water of the liquid as floorslab concrete.
Embodiment 4
Certain workshop floor area 1205m2, poured with C25 pump concrete, concrete amount is expected to be 300m3, gas at that time
Temperature is -1~3 DEG C, is poured with automotive pump, does not add early strong and antifreezing component, surrounding after floor concrete casting in concrete batching
The brick enclosing in edge, with containing 0.035% triethanolamine of weight concentration and 20% sodium nitrite in aqueous solution water storing conservation seven days.
Embodiment 5
Certain commercial and residential building floor area 845m2, poured with C25 normal concrete, temperature is 3~5 DEG C when construction, floor coagulation
Soil, which pours rear edge and lays bricks, encloses shelves, with 0.04% triethanolamine aqueous solution water storing conservation of weight concentration, conserves depth of water 12mm,
Next day, unexpected cold wave arrived, and there's a sudden fall in temperature arrives -3 DEG C, and thin ice have been tied on surface, then prepare 0.04% triethanolamine of weight concentration again
Maintenance depth of water 20mm is added to 20% calcium nitrite, is conserved 10 days.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (4)
1. a kind of early strong anticracking anti-freezing method of concrete floor winter construction, it is characterised in that follow the steps below:
(1) in mixing plant according to the concrete mix of setting, it is separately added into coarse-fine aggregate, sand, cement, mineral after metering and adds
Add agent, additive, is stirred evenly with water；
(2) early strength agent is added according to the 0~50% of early strength agent setting value weight in concrete；
(3) floor concrete pours, vibrates, plasters；
(4) enclosing is built in the floor surrounding poured, forms the condition of water storing conservation；
(5) accelerating component being added in concrete mix, i.e. the 50~100% of early strength agent setting value weight are added and support
It protects in water, is configured to maintenance aqueous solution；
(6) maintenance aqueous solution is pumped on floor concrete, carries out water storing conservation.
2. the early strong anticracking anti-freezing method of a kind of concrete floor winter construction according to claim 1, which is characterized in that
Floorslab concrete is by the way of water storing conservation, at least seven days, the accelerating component for conserving aqueous solution is made to have time enough to mixed
Solidifying soil internal migration diffusion.
3. the early strong anticracking anti-freezing method of a kind of concrete floor winter construction according to claim 1, which is characterized in that
The early strength agent is triethanolamine soluble easily in water, sodium sulphate or the two mixture, weight concentration range in water
It is 0.03~3.5%.
4. the early strong anticracking anti-freezing method of a kind of concrete floor winter construction according to claim 1, which is characterized in that
In 3 DEG C of low temperature season of temperature <, or the season for thering is cold current to arrive, it is directly added into antifreezing component again in curing water, antifreeze group
Point accounting for curing water weight concentration is 10~50%, and the antifreezing component is diffluent sodium nitrite, sodium sulfite or nitrous
Sour calcium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969206.4A CN106545165B (en) | 2016-11-06 | 2016-11-06 | A kind of early strong anticracking anti-freezing method of concrete floor winter construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969206.4A CN106545165B (en) | 2016-11-06 | 2016-11-06 | A kind of early strong anticracking anti-freezing method of concrete floor winter construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106545165A CN106545165A (en) | 2017-03-29 |
| CN106545165B true CN106545165B (en) | 2019-01-29 |
Family
ID=58394654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610969206.4A Active CN106545165B (en) | 2016-11-06 | 2016-11-06 | A kind of early strong anticracking anti-freezing method of concrete floor winter construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106545165B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794536A (en) * | 2020-07-03 | 2020-10-20 | 中国水利水电第六工程局有限公司 | Rock wall crane beam concrete temperature control method, device and system |
| CN114407476B (en) * | 2021-12-02 | 2023-08-04 | 同济大学 | Concrete surface heat insulation material and preparation method and use method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57123848A (en) * | 1981-01-23 | 1982-08-02 | Denki Kagaku Kogyo Kk | Manufacture of concrete products |
| JP3045276B2 (en) * | 1995-08-07 | 2000-05-29 | 株式会社大林組 | Concrete curing method |
| JPH0949325A (en) * | 1995-08-07 | 1997-02-18 | Ohbayashi Corp | Cooling method of concrete |
| CN101319494B (en) * | 2008-07-22 | 2010-06-02 | 安蓉建设总公司 | Concrete construction method for extreme cold area in low temperature season |
| CN101913828B (en) * | 2010-08-19 | 2012-07-04 | 武汉理工大学 | High anti-cracking large volume radiation-proof concrete and construction process thereof |
| CN102797358B (en) * | 2012-08-31 | 2014-08-06 | 中铁二十局集团有限公司 | Construction technique for ultralow-temperature high-property concrete for railway construction in frigid areas |
| CN103787628A (en) * | 2013-12-18 | 2014-05-14 | 中铁五局（集团）有限公司 | Preparation method of low-temperature early strength concrete for high cold permafrost region tunnel |
| CN104446174A (en) * | 2014-10-30 | 2015-03-25 | 中国铁道科学研究院铁道建筑研究所 | High-crack-resistant concrete suitable for severe environment and construction method thereof |
-
2016
- 2016-11-06 CN CN201610969206.4A patent/CN106545165B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106545165A (en) | 2017-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107010885B (en) | Impervious concrete and preparation method thereof | |
| CN104844047B (en) | Compound antifreezer and anti-freezing pumping agents | |
| CN103496923B (en) | Rapid setting early-strength anti-aqueous dispersion grouting material and preparation method thereof | |
| CN103193415B (en) | Retarded cement grinding aid and preparation method thereof | |
| CN101538135A (en) | Vegetation form cellular concrete and method for preparing same | |
| CN102491700B (en) | Freezing process construction completing high-performance constant negative temperature concrete | |
| CN111995339A (en) | Anti-scouring solidified soil for ocean platform and preparation method thereof | |
| CN109320167A (en) | Cracking resistance/corrosion resistant concrete and its preparation method and application, concrete pressure pipe and preparation method thereof | |
| CN105481324A (en) | Inorganic grouting blocking material | |
| CN106545165B (en) | A kind of early strong anticracking anti-freezing method of concrete floor winter construction | |
| CN110482965A (en) | Strength grade is the water conservancy project entity structure high performance concrete and its construction method of C30~C40 | |
| CN102924023B (en) | Sulphoaluminate-base high-strength grouting concrete and preparation method thereof | |
| CN104478281A (en) | Concrete antifreezing agent | |
| CN113024148A (en) | Concrete composite antifreezing agent and preparation method thereof | |
| CN104961418A (en) | Post-tensioning prestress hole channel slurry pressing material suitable for low temperature environment and preparing method thereof | |
| CN104496350A (en) | Corrosion-resistant polymer modified cement mortar and preparation method thereof | |
| CN108675711A (en) | Ready-mixed concrete construction method under high and cold alternate freezing and thawing environment | |
| CN104030599A (en) | Antifreezing polycarboxylic acid composite pumping water reducing agent and application thereof | |
| CN105199066B (en) | The preparation method of modified naphthalene series water-reducing agent | |
| CN102060478B (en) | Pearly sand concrete and pumping method thereof | |
| CN103030326A (en) | Preparation method of compound concrete antifreezing agent | |
| CN107010898A (en) | A kind of seabed tunnel injecting paste material | |
| CN116041007B (en) | Freeze-resistant early-strength type sprayed concrete for high-altitude and high-cold areas and application method thereof | |
| CN107386267A (en) | Karst foundation grouting serous fluid is controlled to be lost in, the method for polluted underground water | |
| CN104891903B (en) | A kind of super high pump-conveying is adjustable solidifying mortar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 211123 Qinglong community, Chunhua street, Jiangning District, Nanjing City, Jiangsu Province Patentee after: Nanjing Youxi Technology Group Co.,Ltd. Address before: 211123 Qinglong community, Chunhua street, Jiangning District, Nanjing City, Jiangsu Province Patentee before: NANJING YOUXI SCIENCE AND TECHNOLOGY LLC |
|
| CP01 | Change in the name or title of a patent holder |