CN101851968A - Construction method for preventing outer wall of basement from cracking - Google Patents
Construction method for preventing outer wall of basement from cracking Download PDFInfo
- Publication number
- CN101851968A CN101851968A CN200910131437A CN200910131437A CN101851968A CN 101851968 A CN101851968 A CN 101851968A CN 200910131437 A CN200910131437 A CN 200910131437A CN 200910131437 A CN200910131437 A CN 200910131437A CN 101851968 A CN101851968 A CN 101851968A
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- CN
- China
- Prior art keywords
- wall
- concrete
- basement
- cement
- curing
- 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.)
- Pending
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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
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00517—Coating or impregnation materials for masonry
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a construction method for preventing an outer wall of a basement from cracking, which comprises a step of mixing and preparing concrete, a step of reinforcing bars for a wall, a step of pouring the concrete and a step of maintaining the wall. The construction method is suitable for construction of polypropylene fiber anti-cracking concrete of the outer wall of the extra-long extra-thick ultrahigh basement.
Description
Technical field
The present invention relates to a kind of construction techniques, relate in particular to a kind of job practices that prevents the outer wall of basement crack.
Background technology
In the modern high-new concrete work, concrete application develops towards high strength, high flowability direction.Along with the raising of the concrete strength and the slump, the consumption of cement constantly increases, and the side effect that brings thus is heat of hydration aggravation, and concrete solidification shrinkage amount strengthens, and shrinkage stress increases, and crack quantity increases.In addition, along with building unit develops to large volume, large tracts of land, complex-shaped various direction, to the development of the underground space, the stress in the concrete is big and complicated, and the appearance in crack was also much more.
Summary of the invention
Purpose of the present invention provides a kind of job practices that prevents the outer wall of basement crack.
The technical solution used in the present invention is::
A kind of job practices that prevents the outer wall of basement crack comprises concrete mixed preparing, wall reinforcement step, concrete maintenance step of building step and body of wall,
(1) concrete mixed preparing:
Cement 250-320i part, flyash 100m part, retarding water reducer 0.5-1 part, air entraining agent 5-9 part, polypropylene fibre 0.5-1 part, coarse aggregate 900-1100 part, fines 600-1000 part, water 120-180 part.
(2) wall reinforcement step:
Wall reinforcement is thin and close, and 80m-150mm joins stud by spacing, and horizontal bar is located at the stud outside;
(3) the concrete step of building:
The long wall section construction of basement is provided with the construction ater-casting by being not more than the 40m spacing in distortion and stressed less position, and the control concrete slump is 140 ± 20mm;
(4) the maintenance step of body of wall:
Tear internal mold open behind the above 72h of outer wall of basement thickness 400mm, form removal behind the curing in the mold 14d of the outside, after the exterior wall internal mold is removed immediately at concrete surface parcel Polypropylence Sheet and/or in the plug-in straw screen or mat insulation of Polypropylence Sheet; Often water between curing time and keep metope moist curing 14d.
Described cement is middle low-heat low alkali cement; Described coarse aggregate is the rubble of the continuous particle diameter of 5-25mm, and mud content is less than 0.5%; Described fines is a 2.5-3.0 purpose medium coarse sand, and mud content is less than 1%.
The polypropylene fibre anti-crack concrete is an admixture polypropylene fibre in concrete in the name of the present invention, fiber has formed random in the netted enhancing system that distributes, polypropylene fibre and cementitious material have extremely strong adhesion, can stop the segregation of concrete aggregate, hinder the formation of settlement crack.The unrest of fiber improves tensile strength to distributing, and reduces dry shrinkage of concrete, improves concrete initial set cracking resistance, can effectively prevent the generation in harmful crack, reduces harmless crack, reduces creep of concrete.
The present invention is suitable for the construction of ultra-long and ultra-thick superelevation outer wall of basement polypropylene fibre anti-crack concrete.The super thick outer wall of basement polypropylene fibre anti-crack concrete construction of overlength superelevation, the every cubic meter of concrete of adding coal ash is saved cement 40kg in the concrete, the admixture micro-expanding agent does not drop into about 15 yuan for every cubic metre less, guarantee that the wall reinforcement rate is constant, arrangement of reinforcement is accomplished thin and close, does not increase the engineering input.Concrete density, impermeability improve greatly, and underground water does not enrich the area can reduce outer waterproof, and economic benefit is obvious.The concrete surface microcrack reduces 90%.Outward appearance is closely knit smooth, adopts the engineering of this worker method construction, all is subjected to the favorable comment of relevant departments such as engineering quality supervision department, Construction unit, supervisor, Architecture Industry Association, and architecture quality is good.
A kind of job practices that prevents the outer wall of basement crack comprises concrete mixed preparing, wall reinforcement step, concrete maintenance step of building step and body of wall, (1) concrete mixed preparing:
Cement 250-320 part, 100 parts in flyash, retarding water reducer 0.5-1 part, air entraining agent 5-9 part, polypropylene fibre 0.5-1 part, coarse aggregate 900-1100 part, fines 600-1000 part, water 120-180 part;
(2) wall reinforcement step:
Wall reinforcement is thin and close, and 80-150mm joins stud by spacing, and horizontal bar is located at the stud outside;
(3) the concrete step of building:
The long wall section construction of basement is provided with the construction ater-casting by being not more than the 40m spacing in distortion and stressed less position, and the control concrete slump is 140 ± 20mm;
(4) the maintenance step of body of wall:
Tear internal mold open behind the above 72h of outer wall of basement thickness 400mm, form removal behind the curing in the mold 14d of the outside, after the exterior wall internal mold is removed immediately at concrete surface parcel Polypropylence Sheet and/or in the plug-in straw screen or mat insulation of Polypropylence Sheet; Often water between curing time and keep metope moist curing 14d.
Cement is middle low-heat low alkali cement; Coarse aggregate is the rubble of the continuous particle diameter of 5-25mm, and mud content is less than 0.5%; Fines is a 2.5-3.0 purpose medium coarse sand, and mud content is less than 1%.
Claims (2)
1. a job practices that prevents the outer wall of basement crack comprises concrete mixed preparing, wall reinforcement step, concrete maintenance step of building step and body of wall, it is characterized in that:
(1) concrete mixed preparing is by weight:
Cement 250-320 part, 100 parts in flyash, the refreshing type water reducing agent of slow setting 0.5-1 part, air entraining agent 5-9 part, polypropylene fibre 0.5-1 part, coarse aggregate 900-1100 part, fines 600-1000 part, water 120--180 part.
Control concrete air content 3%-5%.
(2) wall reinforcement step:
Wall reinforcement is thin and close, and 80-150mm joins stud by spacing, and horizontal bar is located at the stud outside;
(3) the concrete step of building:
The long wall section construction of basement is provided with the construction ater-casting by being not more than the 40m spacing in distortion and stressed less position, and the control concrete slump is 140 ± 20mm.
(4) the maintenance step of body of wall:
Tear internal mold open behind the above 72h of outer wall of basement thickness 400mm, form removal behind the curing in the mold 14d of the outside, after the exterior wall internal mold is removed immediately at concrete surface parcel Polypropylence Sheet and/or in the plug-in straw screen or mat insulation of Polypropylence Sheet; Often water between curing time and keep metope moist curing 14d.
2. the job practices of anti-underground outdoor wall crack according to claim 1 is characterized in that described cement is middle low-heat low alkali cement; Described coarse aggregate is the rubble of the continuous particle diameter of 5-25mm, and mud content is less than 0.5%; Described fines is a 2.5-3.0 purpose medium coarse sand, and mud content is less than 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910131437A CN101851968A (en) | 2009-03-30 | 2009-03-30 | Construction method for preventing outer wall of basement from cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910131437A CN101851968A (en) | 2009-03-30 | 2009-03-30 | Construction method for preventing outer wall of basement from cracking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101851968A true CN101851968A (en) | 2010-10-06 |
Family
ID=42803636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910131437A Pending CN101851968A (en) | 2009-03-30 | 2009-03-30 | Construction method for preventing outer wall of basement from cracking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101851968A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493493A (en) * | 2011-12-12 | 2012-06-13 | 山东建筑大学 | Method for plugging horizontal fissures of basement concrete structure by grouting microorganisms |
| CN103498557A (en) * | 2013-09-29 | 2014-01-08 | 范洁群 | Method for controlling crack of fiber reinforced concrete wall |
| CN104631664A (en) * | 2014-07-14 | 2015-05-20 | 中冶交通（沈阳）建设工程有限公司 | Construction method for controlling cracking of concrete wall |
| CN108689670A (en) * | 2018-05-28 | 2018-10-23 | 石家庄金隅旭成混凝土有限公司 | A kind of concrete and preparation method thereof for long walling work |
-
2009
- 2009-03-30 CN CN200910131437A patent/CN101851968A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493493A (en) * | 2011-12-12 | 2012-06-13 | 山东建筑大学 | Method for plugging horizontal fissures of basement concrete structure by grouting microorganisms |
| CN102493493B (en) * | 2011-12-12 | 2013-08-28 | 山东建筑大学 | Method for plugging horizontal fissures of basement concrete structure by grouting microorganisms |
| CN103498557A (en) * | 2013-09-29 | 2014-01-08 | 范洁群 | Method for controlling crack of fiber reinforced concrete wall |
| CN104631664A (en) * | 2014-07-14 | 2015-05-20 | 中冶交通（沈阳）建设工程有限公司 | Construction method for controlling cracking of concrete wall |
| CN108689670A (en) * | 2018-05-28 | 2018-10-23 | 石家庄金隅旭成混凝土有限公司 | A kind of concrete and preparation method thereof for long walling work |
| CN108689670B (en) * | 2018-05-28 | 2021-04-16 | 石家庄金隅旭成混凝土有限公司 | Concrete for long wall engineering and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101006 |