CN104446282A - Polyvinyl alcohol fiber magnesium cement reinforcing mortar - Google Patents
Polyvinyl alcohol fiber magnesium cement reinforcing mortar Download PDFInfo
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- CN104446282A CN104446282A CN201410768244.4A CN201410768244A CN104446282A CN 104446282 A CN104446282 A CN 104446282A CN 201410768244 A CN201410768244 A CN 201410768244A CN 104446282 A CN104446282 A CN 104446282A
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- polyvinyl alcohol
- alcohol fiber
- mortar
- magnesium cement
- magnesium
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses polyvinyl alcohol fiber magnesium cement reinforcing mortar which is prepared from polyvinyl alcohol fibers and magnesium cement mortar. The polyvinyl alcohol fiber magnesium cement reinforcing mortar disclosed by the invention has the characteristics of being excellent in adhesive property and waterproof performance, high in coagulation speed and the like; the mortar can be used for better cooperating with old concrete, has good ductility and is excellent in reinforcing effect; and the fiber reinforcing mortar is low in construction cost, easy to prepare raw materials and simple to construct, and the mortar can be directly smeared on the peripheries of structural members; the reinforcing mortar is good in economic, social and environmental protection benefits, and is suitable for popularization and application in a large scale.
Description
Technical field
The invention belongs to engineering construction and reinforce field of mortar, be specifically related to a kind of polyvinyl alcohol fiber magnesium cement stabilization mortar.
Background technology
Concrete and skeleton construction use maximum structure types in Contemporary Architecture engineering, and the advantages such as high with its supporting capacity, durable, fire-resistant, wear resistance is good are famous.But along with the popularization of concrete structure, the variation of environment for use, its erosion hazard being subject to environment also increases day by day, the weather resistance of concrete structure and work-ing life problem, become the problem that field of civil engineering receives much concern.Common concrete diseases mainly contains: the concrete carbonization that environmental problem causes, freeze thawing and corrosion failure; Nature causes concrete structure deformation failure with thinking; The structural bearing capacity that design or construction wrong cause is not enough.
Current, mainly structural strengthening is adopted to these concrete diseases structures.That mentions in " concrete structure reinforcement design specifications " (GB 50367-2013) has increasing section method for strengthening, additional prestressing, displacement concrete strengthening method, affixing steel plate reinforcement method, pastes fiber composite material method for strengthening, adhesivebonded bar method for strengthening, setting support method for strengthening, wrapping wire method for strengthening, and with the matching used embedding re-bar technique of various reinforcement means, crab-bolt technology, reinforcing bar rust-prevent technology and repairing technology of concrete crack etc.
Mortar method for strengthening and concrete section increment method for strengthening similar, but the shortcoming such as mortar ubiquity early strength in the market for structural strengthening is low, form removal is slow, curing time is long.So, high-early-strength can be predicted, adhesive property is superior, structural strengthening mortar that ductility is good is with a wide range of applications and market.
Summary of the invention
In view of concrete structure disease problem, the object of the present invention is to provide a kind of polyvinyl alcohol fiber magnesium cement stabilization mortar, this reinforcing mortar has the features such as superior adhesive property, fire resistance and rate of set be fast, can well with old concrete collaborative work, there is good ductility, serve good reinforcement effect, and this fiber reinforced mortar cost is low, starting material easily obtain, and construction is simple, can directly spread upon structural member periphery, easy to use.
For achieving the above object, the present invention adopts following technical scheme:
A kind of polyvinyl alcohol fiber magnesium cement stabilization mortar is made up of polyvinyl alcohol fiber and magnesium sand-cement slurry.
Described polyvinyl alcohol fiber specification is Φ 0.038mm × 12mm, and its consumption is 1% ~ 2% of siccative volume or 0.5% ~ 0.15% of siccative quality.
Described polyvinyl alcohol fiber should be opened agglomerating fiber dispersion before addition, evenly adds.
Consisting of of described magnesium sand-cement slurry: according to percent by weight: magnesium cement 40% ~ 55%, medium sand 30% ~ 45%, water 10% ~ 15%, the weight percentage sum of three is 100%, and each component mixes.
The fineness modulus of described medium sand is 2.0 ~ 2.5.
The preparation method of described magnesium cement is: mixed for 1:2 ~ 4 by weight with dead burned magnesia powder by potassium primary phosphate, then add the borax of dead burned magnesia grain weight amount 1% ~ 3%.
During use, carry out according to the following steps: first each for magnesium cement component and medium sand are carried out premixing mixing in proportion, then in the mixture stirred, add the required water yield, stir into slurry, in slurry, add required polyvinyl alcohol fiber again, stir and can use.
Compared with prior art, the present invention has following beneficial effect:
(1) adhesive property of magnesium sand-cement slurry own is very good, and can rapid coagulation be reached, polyvinyl alcohol fiber magnesium cement stabilization mortar bonding strength 3 d can reach 2.5 more than MPa, achieves rapid reinforcement, reduces the risk of disease concrete structure generation accident in construction work;
(2) due to the performance of its rapid coagulation, can now mix existing use at the construction field (site), in 3 h, ultimate compression strength can reach 30 more than MPa, substantially increase operating efficiency;
(3) add polyvinyl alcohol fiber in magnesium sand-cement slurry, serve action of crack arrest, greatly strengthen the ductility of mortar, can better with old concrete collaborative work, extend time to rupture;
(4) environmental protection: nontoxic, harmless, and do not have corrosive nature to reinforcing bar, on surrounding environment and water quality without impact.
(5) with low cost, blending process is simple, stable performance, is applicable to large-scale promotion and uses.
Embodiment
A kind of polyvinyl alcohol fiber magnesium cement stabilization mortar is made up of polyvinyl alcohol fiber and magnesium sand-cement slurry; Described polyvinyl alcohol fiber specification is Φ 0.038mm × 12mm, and fibers content is 1% ~ 2%(siccative massfraction of siccative volume is 0.5% ~ 0.15%); Consisting of of described magnesium sand-cement slurry: according to percent by weight: magnesium cement 40% ~ 55%, medium sand 30% ~ 45%, water 10% ~ 15%, the weight percentage sum of three is 100%, and each component mixes.
The fineness modulus of described medium sand is 2.0 ~ 2.5.
Described magnesium cement is: mixed for 1:2 ~ 4 by weight with dead burned magnesia powder by potassium primary phosphate, then add the borax of dead burned magnesia grain weight amount 1% ~ 3%.
Described polyvinyl alcohol fiber should be opened agglomerating fiber dispersion before addition, evenly adds.
The present invention reinforces mortar for engineering construction field of reinforcement, during use, carry out according to the following steps: first each for magnesium cement component and medium sand are carried out premixing mixing in proportion, then in the mixture stirred, the required water yield is added, stir into slurry, in slurry, add required polyvinyl alcohol fiber again, stir and can use.
embodiment 1
A kind of polyvinyl alcohol fiber magnesium cement stabilization mortar is made up of polyvinyl alcohol fiber and magnesium sand-cement slurry; Described polyvinyl alcohol fiber (purchased from Yong'an City Bao Hualin industry development company limited of Fujian Province) specification is Φ 0.038mm × 12mm, and fibers content is the 2%(siccative massfraction of siccative volume is 0.13%); Consisting of of described magnesium sand-cement slurry: according to percent by weight: magnesium cement 44.4%, medium sand 44.4%, water 11.2%, mix.
Using method step is: first each for magnesium cement component and medium sand are carried out premixing mixing in proportion, then in the mixture stirred, the required water yield is added, stir into slurry, in slurry, add required polyvinyl alcohol fiber again (to open being entangled with agglomerating fiber dispersion before addition, evenly add), stir and can use.
Be 200 mm × 200 mm with cross section, the model post of long 800 mm, for reinforcing object, adopts mortar reinforcing mat of the present invention to reinforce, evenly whitewashes at pillar on four sides, reinforcing thickness 20 mm.Contrast with unguyed model post, load at first crack improves 30% ~ 50%, and peak load improves 40% ~ 60%.
embodiment 2
A kind of polyvinyl alcohol fiber magnesium cement stabilization mortar is made up of polyvinyl alcohol fiber and magnesium sand-cement slurry; Described polyvinyl alcohol fiber (purchased from Yong'an City Bao Hualin industry development company limited of Fujian Province) specification is Φ 0.038mm × 12mm, and fibers content is the 1%(siccative massfraction of siccative volume is 0.07%); Consisting of of described magnesium sand-cement slurry: according to percent by weight: magnesium cement 48.8%, medium sand 39%, water 12.2%, mix.
embodiment 3
A kind of polyvinyl alcohol fiber magnesium cement stabilization mortar is made up of polyvinyl alcohol fiber and magnesium sand-cement slurry; Described polyvinyl alcohol fiber (purchased from Yong'an City Bao Hualin industry development company limited of Fujian Province) specification is Φ 0.038mm × 12mm, and fibers content is the 1.5%(siccative massfraction of siccative volume is 0.1%); Consisting of of described magnesium sand-cement slurry: according to percent by weight: magnesium cement 54.1%, medium sand 32.4%, water 13.5%, mix.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (6)
1. a polyvinyl alcohol fiber magnesium cement stabilization mortar, is characterized in that: be made up of polyvinyl alcohol fiber and magnesium sand-cement slurry.
2. polyvinyl alcohol fiber magnesium cement stabilization mortar according to claim 1, is characterized in that: described polyvinyl alcohol fiber specification is Φ 0.038mm × 12mm, and its consumption is 1% ~ 2% of siccative volume or 0.5% ~ 0.15% of siccative quality.
3. polyvinyl alcohol fiber magnesium cement stabilization mortar according to claim 2, is characterized in that: described polyvinyl alcohol fiber should be opened agglomerating fiber dispersion before addition, evenly adds.
4. polyvinyl alcohol fiber magnesium cement stabilization mortar according to claim 1, it is characterized in that: consisting of of described magnesium sand-cement slurry: according to percent by weight: magnesium cement 40% ~ 55%, medium sand 30% ~ 45%, water 10% ~ 15%, the weight percentage sum of three is 100%, and each component mixes.
5. polyvinyl alcohol fiber magnesium cement stabilization mortar according to claim 4, is characterized in that: the fineness modulus of described medium sand is 2.0 ~ 2.5.
6. polyvinyl alcohol fiber magnesium cement stabilization mortar according to claim 4, it is characterized in that: the preparation method of described magnesium cement is: potassium primary phosphate is mixed for 1:2 ~ 4 by weight with dead burned magnesia powder, then adds the borax of dead burned magnesia grain weight amount 1% ~ 3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410768244.4A CN104446282A (en) | 2014-12-15 | 2014-12-15 | Polyvinyl alcohol fiber magnesium cement reinforcing mortar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410768244.4A CN104446282A (en) | 2014-12-15 | 2014-12-15 | Polyvinyl alcohol fiber magnesium cement reinforcing mortar |
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| Publication Number | Publication Date |
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| CN104446282A true CN104446282A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410768244.4A Pending CN104446282A (en) | 2014-12-15 | 2014-12-15 | Polyvinyl alcohol fiber magnesium cement reinforcing mortar |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1207087A (en) * | 1995-12-08 | 1999-02-03 | 罗狄亚化学公司 | Novel binding phase for phosphorus-magnesium cements and use thereof |
| CN102459117A (en) * | 2009-06-10 | 2012-05-16 | 瓦克化学股份公司 | Method for producing fiber-reinforced building-material coatings |
| CN102786285A (en) * | 2012-01-19 | 2012-11-21 | 南京航空航天大学 | Sulfur and phosphate cement insulation mortar or insulation board |
-
2014
- 2014-12-15 CN CN201410768244.4A patent/CN104446282A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1207087A (en) * | 1995-12-08 | 1999-02-03 | 罗狄亚化学公司 | Novel binding phase for phosphorus-magnesium cements and use thereof |
| CN102459117A (en) * | 2009-06-10 | 2012-05-16 | 瓦克化学股份公司 | Method for producing fiber-reinforced building-material coatings |
| CN102786285A (en) * | 2012-01-19 | 2012-11-21 | 南京航空航天大学 | Sulfur and phosphate cement insulation mortar or insulation board |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |