CN1081429A - Antiseepage material for rolled concrete dam surface and construction technology thereof - Google Patents
Antiseepage material for rolled concrete dam surface and construction technology thereof Download PDFInfo
- Publication number
- CN1081429A CN1081429A CN 93108637 CN93108637A CN1081429A CN 1081429 A CN1081429 A CN 1081429A CN 93108637 CN93108637 CN 93108637 CN 93108637 A CN93108637 A CN 93108637A CN 1081429 A CN1081429 A CN 1081429A
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- China
- Prior art keywords
- cement
- dam
- construction technology
- roller compacted
- concrete
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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
-
- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
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- 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
A kind of impervious material that is used for the roller compacted concrete dam dam face seepage is characterized in that the weight percent of cement components is: polyacrylic resin emulsion 5～10%, cement 95～90%.Also can add the 3rd component silicon ash.Its construction parameter is: water-cement ratio 0.4～0.6, injection pressure≤0.5MPa, degree of mobilization 1.5～3.5min.Has good seepage-proof property; cracking resistance, freeze proof, strong alkali-acid resistance corrosion; price is low, and the simple advantage of construction technology can be used as the antiseepage of roller compacted concrete dam dam face seepage and hydraulic structure and harbor work's buildings normal concrete, anticorrosion, anti-charing supercoat.
Description
The invention belongs to the project seepage controlling material.
Along with the rise on roller compacted concrete (RCC) dam, dam face seepage has become distinct issues.In the seepage control measure commonly used both at home and abroad, be excellent with membrane seepage prevention, promptly at inboard high molecular film material or the spray epoxy material waterproofing film pasted of RCC dam facing or dam upstream face Steel Concrete panel as impervious barrier.Adopt polyvinyl chloride cuticula (PVC) as the dam, Winchester (Win Chester) of the U.S., lid Li Siweier Cales Ville) the dam anti seepage membrane seepage control measure as a supplement that adopts epoxide resin material; Its weak point is that the thin film layer that exposes subjects to physical disturbance, and long-time running easily from dam facing disengagement and aging, is subdued anti-seepage effect, generally is used to the area that has a moderate climate.
The prior art that is close with the present invention is CN 85105033 patents, it is prescription about the emulsified bitulith fly ash, though also can reach impervious, cracking resistance, freeze proof requirement, but, it needs heating when construction, ultimate tensile strength reduces when low temperature, is subjected to reverse water pressure power can cause local bulge, only is used for normal concrete.
A kind of good seepage-proof property is provided, good endurance, price is low, and construction technology is easy, and survivable RCC dam face seepage material and construction technology are purposes of the present invention.
Characteristics of the present invention are a kind of roller compacted concrete dam dam face seepages that are used for, and based on the impervious material of macromolecular material and cement, the weight percent of its gelling material component is:
Polyacrylic resin emulsion (third breast) 5～10%
Cement 95～90%
Also can add the 3rd component silicon ash again, its weight ratio is 1～2 of a polyacrylic resin emulsion.
Its construction technique is that gelling material is mixed with water-cement ratio by part ratio is 0.4～0.6, degree of mobilization is 1.5～3.5min mixture, spray with shotcrete machine, injection pressure≤0.5MPa, nozzle pulp bore 10～20mm, close a position about thickness 35cm, be poured in the scope of template, use the hand guided vibratory roller compacting again with interior 3～5cm.
Except that perfusion, be coated with method outside also can be used for, the mixture that is about to prepare sprays (or being coated with) at the maintenance concrete surface in certain length of time with shotcrete machine, the about 2～5mm of coat-thickness.Coating result is also good.
Preparation technology of the present invention is very simple, only needs carry out blend by the weight ratio of each component, and be 0.4～0.6 to be made into the mixture of certain degree of mobilization by water-cement ratio, for guaranteeing its degree of mobilization, can add water reducer, its volume can be decided as required.The cement of gelling material can be similar with the cement of roller compacted concrete, need not select else.Admixture can be with FDN(or UNF) high efficiency water reducing agent, shotcrete machine can be with the perfusion of UJB-1 type extruding type shotcrete machine, with engineering hand-held BW-75s type vibratory roller compacting commonly used.In order to guarantee the homogeneity of mixture construction, the gauge control of closing a position is about 35cm, from consider that economically being in the milk just is enough to satisfy the antiseepage requirement in the scope of template with interior 3～5cm.Will pay special attention to the roller compacted concrete interlayer junction during grouting and not leak filling, the maintenance after mixture pours into, striking time are identical with common roller compacted concrete.
Effect of the present invention:
Compare with the benchmark roller compacted concrete with content fly ash, singly mix 5% third breast, its ultimate compression strength has improved 6.1～7.1%, and tensile strength has improved 21.7～25.0%, and tensile pressure ratio has improved 11.2～17.9%.5.5%, 150 freeze thawing of dry-shrinkage deformed minimizing in 90 days, the modulus of moving relatively improves 5.54%, and permeability coefficient reduces 49.5%; Mix 10% silicon ash and 5% the third simultaneously when newborn, ultimate compression strength has improved 44.9～53.0%, tensile strength has improved 52.4～65.4%, tensile pressure ratio has improved 5.2～8.1%, dry-shrinkage deformedly 8.25%(90 days have been increased), the modulus of moving relatively of 150 freeze thawing improves 11.5%, and permeability coefficient has reduced 92.1%.
Carry out microanalysis by scanning electron microscope, energy depressive spectroscopy and pressure mercury PORE SIZE APPARATUS FOR, show that mixing third breast (or third breast+silica flour) back improves the major cause of the impervious ability of roller compacted concrete and be: (1) has improved gather materials structure with cement stone interface of RCC.From scanning electron microscope (SEM) as seen, the interface region hole of benchmark roller compacted concrete is bigger, short texture, and Ca(OH)
2Crystal is in its interface enrichment, and its interfaces transition layer thickness is about 70 μ m; The structure of mixing 5% third breast or mixing the roller compacted concrete interface region of 5% the third breasts and 10% silicon ash simultaneously is greatly improved, the C-S-H number of gels increase of interfacial transition zone, hydrated product is netted or flocculence more, and has eliminated Ca(OH)
2Enrichment on the interface, the thickness of interface transition layer have only about 20 μ m; (2) improved the pore structure of RCC cement stone.After mixing third breast or silicon ash, on the one hand, pore and macropore in can plugging cement stone be divided into some minute apertures with pore, pore quantity is reduced, and the aperture is reduced; On the other hand, can promote aquation, increase the quantity of C-S-H gel.
Advantage of the present invention is a good seepage-proof property, good endurance, and price is low, and easy construction does not disturb the construction of roller compacted concrete dam, and has the effect of strong alkali-acid resistance corrosive.
The present invention not only can also can be used as the antiseepage of normal concrete, anticorrosion, anti-carbonization protective layer extensively as the impervious barrier of roller compacted concrete dam facing.
Embodiments of the invention:
Embodiment 1 (D
1)
Gelling material polyacrylic resin emulsion 5%
Cement 95%
By water-cement ratio is 0.5 preparation roller compacted concrete (inner blending method), its doping quantity of fly ash be 30%(promptly account for concrete and coal ash total amount in the concrete 30%), carry out normal curing then and to its concrete.
Embodiment 2 (D
2)
Gelatinous material polyacrylic resin emulsion 5%
Silicon ash 10%
Cement 85%
By water-cement ratio is that 0.5 preparation its doping quantity of fly ash of roller compacted concrete (inner blending method) and embodiment 1 is equal to (promptly account in the concrete silicon ash+concrete and coal ash total amount 30%), and its roller compacted concrete specimens is carried out normal curing.
Embodiment 1,2(D
1, D
2) and benchmark roller compacted concrete D
0(not mixing third breast and silicon ash) compares, as table 1.2.3.
Embodiment 3 penetration methods: is 0.5 to be mixed with the mixture that denseness is 1.7min with gelatinous material (containing 5% the third breast and the 10% silicon ashes) by water-cement ratio, with nozzle is that the shotcrete machine of 10～20mm is poured in the roller compacted concrete of 3～5cm scope in the template (injection pressure is 0.2MPa), with the compacting of hand-held vibrator.
Embodiment 4 is outer to be coated with method: with the mixture of embodiment 3, evenly spread upon the concrete surface (brushing repeatedly 2～3 times) of maintenance certain length of time (28d) with brush, coat-thickness is 2～5mm.
Analog reslt such as the table 4 of embodiment 2,3,4.
Claims (3)
1, a kind of roller compacted concrete dam dam face seepage that is used for based on the impervious material of macromolecular material, cement, is characterized in that the weight percent of gelling material component is:
Polyacrylic resin emulsion 5～10%
Cement 95～90%.
2, a kind of impervious material based on macromolecular material, cement except that according to claim 1, is characterized in that adding the 3rd component silicon ash again, and its weight ratio is 1～2 of a polyacrylic resin emulsion.
3, a kind of impervious material as claimed in claim 1 or 2 is characterized in that it is 0.4～0.6 that gelling material is mixed with water-cement ratio by the component ratio, and degree of mobilization is the mixture of 1.5～3.5min, and its construction technology is:
Spray with shotcrete machine, injection pressure≤0.5MPa, nozzle pulp bore 10～20mm is poured in the scope of template with interior 3～5cm, uses the hand guided vibratory roller compacting again.
The construction technology that is coated with method outward is:
With shotcrete machine concrete outside surface is sprayed (or smearing brush), its thickness is 2～5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93108637 CN1081429A (en) | 1993-07-17 | 1993-07-17 | Antiseepage material for rolled concrete dam surface and construction technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93108637 CN1081429A (en) | 1993-07-17 | 1993-07-17 | Antiseepage material for rolled concrete dam surface and construction technology thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1081429A true CN1081429A (en) | 1994-02-02 |
Family
ID=4987222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93108637 Pending CN1081429A (en) | 1993-07-17 | 1993-07-17 | Antiseepage material for rolled concrete dam surface and construction technology thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1081429A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087009C (en) * | 1999-11-17 | 2002-07-03 | 武汉大学 | Efficient water-reducing, slow-settling plasticizing agent of concrete |
| CN102659355A (en) * | 2012-05-30 | 2012-09-12 | 中水东北勘测设计研究有限责任公司 | High frost resistance roller compacted concrete mortar wrapped stone mixing method |
| CN110055933A (en) * | 2019-04-18 | 2019-07-26 | 中水东北勘测设计研究有限责任公司 | A kind of severe cold area concrete dam anti-ice pulls out thermal-insulating leakage-resistant structure and its construction method |
-
1993
- 1993-07-17 CN CN 93108637 patent/CN1081429A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087009C (en) * | 1999-11-17 | 2002-07-03 | 武汉大学 | Efficient water-reducing, slow-settling plasticizing agent of concrete |
| CN102659355A (en) * | 2012-05-30 | 2012-09-12 | 中水东北勘测设计研究有限责任公司 | High frost resistance roller compacted concrete mortar wrapped stone mixing method |
| CN110055933A (en) * | 2019-04-18 | 2019-07-26 | 中水东北勘测设计研究有限责任公司 | A kind of severe cold area concrete dam anti-ice pulls out thermal-insulating leakage-resistant structure and its construction method |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
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