CN1219844C - Sealant for sealing expansion joint of aqueduct bridge, its preparation method and operation methods - Google Patents
Sealant for sealing expansion joint of aqueduct bridge, its preparation method and operation methods Download PDFInfo
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- CN1219844C CN1219844C CN 02115634 CN02115634A CN1219844C CN 1219844 C CN1219844 C CN 1219844C CN 02115634 CN02115634 CN 02115634 CN 02115634 A CN02115634 A CN 02115634A CN 1219844 C CN1219844 C CN 1219844C
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- sealing material
- aqueduct
- expansion joints
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Abstract
The present invention provides a composite material, the weather resistance of which is suitable for the water-stop requirement of an expansion joint of an aqueduct, and the present invention uses double-component elastic polyurethane as main material and uses glass fiber cloth as base material; the present invention is applied to the water stop of the expansion joint of the concrete aqueduct in a lapping and gluing type; the gluing way of the water-stop material and concrete is reasonable, the adapting capacity for deformation is high, the construction processing is simple, and the present invention is suitable for the water-stop construction for the aqueduct expansion joints of different types; the present invention simultaneously provides a preparation method and a use method of the material.
Description
Technical field:
The invention belongs to the water conservancy project material field that is used for the aqueduct expansion joints sealing.
Background technology:
China is a large agricultural country, also is the country of aqueduct more than, and aqueduct is protected transmitting-receiving for China's agricultural produce and waved enormous function.Constructional feature that aqueduct is thin, towering and residing running environment are abominable, cause the aqueduct expansion joints distortion big, make sealing material and water sealing structure pattern in the expansion joint stand acid test.Aqueduct expansion joints sealing Problem of Failure has been ubiquity, and this problem has caused water resources to be wasted in a large number, causes serious loss to field irrigation; Also caused the safe operation of the aqueduct that the depletion of groove pier foundation, bank slope slump etc. cause to be subjected to serious threat.
The method that tradition is used to handle the aqueduct expansion joints sealing has two classes, and the one, Rubber water stop, the 2nd, filleting sealing.The shortcoming of Rubber water stop method is the easy corrosion of steel plate, bolt of anchoring rubber, and water stop rubber is aging easily, and construction technology is loaded down with trivial details, and after sealing lost efficacy, it was very difficult to change sealing material; Some places are pasted the method that rubber replaces bolt anchoring with Resins, epoxy, owing to the weakness of the ageing resistance difference of rubber material own and the undesirable expected effect that do not reach of sticking effect of Resins, epoxy and rubber.The shortcoming of filleting water-stopping method is that jointing material is in the expansion joint, only rely on the elasticity of material itself to bear all distortion of aqueduct expansion joints, the bond effect of sealing material long-run elasticity and sealing material and concrete binding face directly influences stagnant water effect, and the bond effect of sealing material and groove body concrete surface, be subjected to the influence of numerous factors such as construction temperature, concrete surface situation, the long-term good deformation property of material, artificial construction factor, it is wayward that adhesive surface is in the interior construction of seam.This sealing pattern is used for the big aqueduct of expansion joint distortion, and is unreasonable, also can't be permanent.
Summary of the invention:
Aforesaid method all can not fundamentally reasonably solve the sealing problem of aqueduct expansion joints.The purpose of this invention is to provide a kind of weather resisteant and be fit to being main material, being the matrix material of base material of aqueduct expansion joints sealing requirement,, be applied to concrete flume expansion joint sealing to take the pattern that knot is pasted with glass fiber cloth with two ingredient elastic urethane; This sealing material and concrete binding mode are rationally, the adaptation deformability is strong, construction technology is simple, are fit to the aqueduct expansion joints sealing construction of different types.
The technical scheme that patent solution aqueduct expansion joints sealing problem of the present invention is adopted is: over-all propertieies such as preparation stretchiness, weather resisteant, water tolerance satisfy the dual-component polyurethane of aqueduct expansion joints sealing requirement, with this dual-component polyurethane is parent, with the glass fibre is matrix, the sheet section bar of a kind of middle band " Ω " shape that is composited is applied to the aqueduct expansion joints sealing with the overlap joint pattern with direct stickup of special-purpose adhesive.
Characteristics of the present invention are the weakness that overcome on " Rubber water stop " material, prepared the bicomponent elastic polyurethane material of suitable aqueduct running environment, by theoretical analysis and a large amount of test-results demonstration, select for use with the sealing material molecular structure on have the monocomponent polyurethane of coherency to make tackiness agent, to take the mode sealing that knot is pasted, overcome the shortcoming on " filleting sealing " structural shape.Advantages such as therefore the present invention has the sealing material good endurance, stressed rationally it is strong to adapt to deformability, and direct sticking construction, and it is easy to maintenance to construct.
Technical scheme steps of the present invention:
1. preparation is fit to the elastic polyurethane of aqueduct running environment
Aqueduct running environment is abominable, and is higher to the sealing material performance requriements, except that requiring material to have the good elasticity, also requires to have excellent water tolerance, weather resisteant etc.
Utilize elastic polyurethane to have the advantages that under higher hardness, also to have good elasticity, the preparation elastic polyurethane.The preparation elastic polyurethane is selected the polyether polyol of water-tolerant for use, improve the water tolerance of elastic polyurethane, and mix an amount of antioxidant 2246 (2,2 '-methylene radical-two-(4-methyl-6-t-butyl phenol)) and ultraviolet absorbers (2,2 '-dihydroxy-4-methoxy benzophenone), improve the fast light oxygen of material.
The performed polymer weight proportion:
250～400 parts of polyether Glycols
50～200 parts of polyether-tribasic alcohols
(80/20) 60～100 part of TDI
The solidifying agent weight proportion:
6～8 parts of 1,4 butyleneglycols
2～5 parts of TriMethylolPropane(TMP)s
0.01～0.04 part of antioxidant 2246
0.01～0.02 part of ultraviolet absorbers
20～50 parts of dimethylbenzene
0.3～0.5 part of stannous octoate
2. make aqueduct expansion joints sealing material of the present invention
Prepolymer and solidifying agent is even by 1: 2 mixed, thick this compound of the template that coats releasing agent 1 upper berth one deck 2.5mm in customization, then at the slim glass wool cloth of this layer upper berth one deck, the even thick above-mentioned compound of shakedown one deck 2.5mm on the glass wool cloth of completing again after cast finishes, is scraped with scraper and to be smeared evenly, total thickness is no more than the height of baffle plate 2 among Fig. 1, again upper plate among Fig. 13 is covered, the material that extrude at two ends is cleaned out, treat to get final product the demoulding behind the hardened material.The sealing material that completes is seen Fig. 2.
When making sealing material of the present invention, the one, note the even laying of every layer material, the 2nd, the making of " Ω " shape in the middle of noting.The dimension D of " Ω " shape determines that according to the width at expansion joint general D is 20mm～40mm, and the length L of sealing material is determined according to the different cross dimensions of aqueduct.
3. the tectonic type of aqueduct expansion joints sealing
Select single-component polyether(poly)urethane tackiness agent for use, sealing material of the present invention is pasted on both sides, aqueduct body expansion joint with the overlap joint pattern.
" Ω " shape of sealing material can be slowed down the direct tensile deformation of sealing material, and when deflection that the expansion joint deflection has less than " Ω " shape, material itself can not be subjected to the tensile stress effect, thereby helps the durable for a long time of material; When flexible when being sewed with moderate finite deformation, after having made full use of the distortion that " Ω " shape can bear, sealing material itself just can be born remaining deflection; The size that increases " Ω " shape in the time of also can taking the moulding sealing material for the expansion joint that excessive deformation is arranged in addition improves the deformability of sealing material.Thereby sealing material of the present invention and sealing pattern to adapt to deformability strong, good endurance can satisfy the gross distortion requirement of aqueduct expansion joints.
Example of the present invention provides by technique scheme, is used for the aqueduct expansion joints sealing.Sealing construction technology of the present invention is:
1. handle the concrete binding basal plane
Newly-built aqueduct cleaned out the floating dust of basal plane get final product; Old aqueduct is sticked with glue agent prepared polymer grout, mend the honeycomb and scale on the flat adhesive surface;
2. paste sealing material of the present invention
Brushing one deck polyether-type monocomponent polyurethane adhesive on the adhesive surface of the concrete binding face of aqueduct body 5 and sealing material 4 is bonding with sealing material and aqueduct expansion joints adhesive surface then respectively, fixes with template;
To the aqueduct of Fig. 3 groove body structure, before the stickup sealing material, lay tar sand plate or plastic foam back lining materials 7 earlier;
3. form removal
Temperature during according to construction is determined the form removal time;
4. making protective layer
To the aqueduct of Fig. 4 groove body structure, smooth for guaranteeing aqueduct body 5 flow surfaces, need after sealing material 4 stickups are finished, to do protective layer, do protective layer with elastic mortar 6;
After finishing construction, water sealing structure is seen Fig. 3, Fig. 4.Two kinds of sealing construction figure of Fig. 3, Fig. 4 are fit to the aqueduct expansion joints sealing of different expanded joint structures.
Description of drawings:
Fig. 1 is the model of aqueduct expansion joints sealing material and the aqueduct expansion joints sealing material stereographic map of making.
Fig. 2 is the cross-sectional view of aqueduct expansion joints sealing material.
Fig. 3,4 is two kinds of different water sealing structure figure.
Embodiment:
Embodiment 1: prepare the aqueduct expansion joints sealing material according to following proportioning
The performed polymer weight proportion:
255 parts of polyether Glycols
55 parts of polyether-tribasic alcohols
(80/20) 65 part of TDI
The solidifying agent weight proportion:
7 parts of 1,4 butyleneglycols
3 parts of TriMethylolPropane(TMP)s
0.03 part of antioxidant 2246
0.01 part of ultraviolet absorbers
22 parts of dimethylbenzene
0.3 part of stannous octoate
Prepolymer and solidifying agent is even by 1: 2 mixed, thick this compound of the template that coats releasing agent 1 upper berth one deck 2.5mm in customization, then at the slim glass wool cloth of this layer upper berth one deck, the even thick above-mentioned compound of shakedown one deck 2.5mm on the glass wool cloth of completing again after cast finishes, is scraped with scraper and to be smeared evenly, total thickness is no more than the height of baffle plate 2 among Fig. 1, again upper plate among Fig. 13 is covered, the material that extrude at two ends is cleaned out, treat to get final product the demoulding behind the hardened material.
Embodiment 2: prepare the aqueduct expansion joints sealing material according to following proportioning
The performed polymer weight proportion:
300 parts of polyether Glycols
100 parts of polyether-tribasic alcohols
(80/20) 80 part of TDI
The solidifying agent weight proportion:
7 parts of 1,4 butyleneglycols
4 parts of TriMethylolPropane(TMP)s
0.03 part of antioxidant 2246
0.01 part of ultraviolet absorbers
30 parts of dimethylbenzene
0.4 part of stannous octoate
Prepolymer and solidifying agent is even by 1: 2 mixed, thick this compound of the template that coats releasing agent 1 upper berth one deck 2.5mm in customization, then at the slim glass wool cloth of this layer upper berth one deck, the even thick above-mentioned compound of shakedown one deck 2.5mm on the glass wool cloth of completing again after cast finishes, is scraped with scraper and to be smeared evenly, total thickness is no more than the height of baffle plate 2 among Fig. 1, again upper plate among Fig. 13 is covered, the material that extrude at two ends is cleaned out, treat to get final product the demoulding behind the hardened material.
Embodiment 3: prepare the aqueduct expansion joints sealing material according to following proportioning
The performed polymer weight proportion:
250 parts of polyether Glycols
150 parts of polyether-tribasic alcohols
(80/20) 85 part of TDI
The solidifying agent weight proportion:
8 parts of 1,4 butyleneglycols
3 parts of TriMethylolPropane(TMP)s
0.03 part of antioxidant 2246
0.02 part of ultraviolet absorbers
40 parts of dimethylbenzene
0.4 part of stannous octoate
Prepolymer and solidifying agent is even by 1: 2 mixed, thick this compound of the template that coats releasing agent 1 upper berth one deck 2.5mm in customization, then at the slim glass wool cloth of this layer upper berth one deck, the even thick above-mentioned compound of shakedown one deck 2.5mm on the glass wool cloth of completing again after cast finishes, is scraped with scraper and to be smeared evenly, total thickness is no more than the height of baffle plate 2 among Fig. 1, again upper plate among Fig. 13 is covered, the material that extrude at two ends is cleaned out, treat to get final product the demoulding behind the hardened material.
Embodiment 4: prepare the aqueduct expansion joints sealing material according to following proportioning
The performed polymer weight proportion:
390 parts of polyether Glycols
190 parts of polyether-tribasic alcohols
(80/20) 90 part of TDI
The solidifying agent weight proportion:
8 parts of 1,4 butyleneglycols
4 parts of TriMethylolPropane(TMP)s
0.04 part of antioxidant 2246
0.02 part of ultraviolet absorbers
49 parts of dimethylbenzene
0.5 part of stannous octoate
Prepolymer and solidifying agent is even by 1: 2 mixed, thick this compound of the template that coats releasing agent 1 upper berth one deck 2.5mm in customization, then at the slim glass wool cloth of this layer upper berth one deck, the even thick above-mentioned compound of shakedown one deck 2.5mm on the glass wool cloth of completing again after cast finishes, is scraped with scraper and to be smeared evenly, total thickness is no more than the height of baffle plate 2 among Fig. 1, again upper plate among Fig. 13 is covered, the material that extrude at two ends is cleaned out, treat to get final product the demoulding behind the hardened material.
Claims (7)
1. an aqueduct expansion joints sealing material is characterized in that doing base material with the glass wool cloth fiber, is a kind of middle sheet sealing material of being with " Ω " shape that main material is composited with two ingredient elastic urethane;
The material configuration proportion of its dual-component polyurethane is as follows:
Performed polymer weight part proportioning: polyether Glycols 250～400
Polyether-tribasic alcohol 50～200
Tolylene diisocyanate TDI (80/20) 60～100
Solidifying agent weight part proportioning: 1,4 butyleneglycol 6～8
TriMethylolPropane(TMP) 2～5
Antioxidant 2246
2,2 '-methylene radical-two (4-methyl-6-tert butyl phenol) 0.01～0.04
Ultraviolet absorbers 0.01～0.02
Dimethylbenzene 20～50
Stannous octoate 0.3～0.5
The ratio of prepolymer and solidifying agent is 1: 2.
2, the described aqueduct expansion joints sealing material of claim 1 is characterized in that the material configuration proportion of its dual-component polyurethane is as follows:
The performed polymer weight proportion:
255 parts of polyether Glycols
55 parts of polyether-tribasic alcohols
(80/20) 65 part of TDI
The solidifying agent weight proportion:
7 parts of 1,4 butyleneglycols
3 parts of TriMethylolPropane(TMP)s
0.03 part of antioxidant 2246
0.01 part of ultraviolet absorbers
22 parts of dimethylbenzene
0.3 part of stannous octoate
3, the described aqueduct expansion joints sealing material of claim 1 is characterized in that the material configuration proportion of its dual-component polyurethane is as follows:
The performed polymer weight proportion:
300 parts of polyether Glycols
100 parts of polyether-tribasic alcohols
(80/20) 80 part of TDI
The solidifying agent weight proportion:
7 parts of 1,4 butyleneglycols
4 parts of TriMethylolPropane(TMP)s
0.03 part of antioxidant 2246
0.01 part of ultraviolet absorbers
30 parts of dimethylbenzene
0.4 part of stannous octoate
4, the described aqueduct expansion joints sealing material of claim 1 is characterized in that the material configuration proportion of its dual-component polyurethane is as follows:
The performed polymer weight proportion:
250 parts of polyether Glycols
150 parts of polyether-tribasic alcohols
(80/20) 85 part of TDI
The solidifying agent weight proportion:
8 parts of 1,4 butyleneglycols
3 parts of TriMethylolPropane(TMP)s
0.03 part of antioxidant 2246
0.02 part of ultraviolet absorbers
40 parts of dimethylbenzene
0.4 part of stannous octoate
5, the described aqueduct expansion joints sealing material of claim 1 is characterized in that the material configuration proportion of its dual-component polyurethane is as follows:
The performed polymer weight proportion:
390 parts of polyether Glycols
190 parts of polyether-tribasic alcohols
(80/20) 90 part of TDI
The solidifying agent weight proportion:
8 parts of 1,4 butyleneglycols
4 parts of TriMethylolPropane(TMP)s
0.04 part of antioxidant 2246
0.02 part of ultraviolet absorbers
49 parts of dimethylbenzene
0.5 part of stannous octoate
6, the preparation method of the described aqueduct expansion joints sealing material of a kind of claim 1 comprises:
Prepolymer and solidifying agent is even by 1: 2 mixed, thick this compound of template upper berth one deck 2.5mm that coats releasing agent in customization, then at the slim glass wool cloth of this layer upper berth one deck, the even thick above-mentioned compound of shakedown one deck 2.5mm on the glass wool cloth of completing again, after cast finishes, scrape with scraper and to smear evenly, again upper plate is covered, the material that extrude at two ends is cleaned out, treated to get final product the demoulding behind the hardened material.
7, the using method of the described aqueduct expansion joints sealing material of a kind of claim 1 comprises the following steps:
1) handles the concrete binding basal plane
Newly-built aqueduct cleaned out the floating dust of basal plane get final product; Old aqueduct is sticked with glue agent prepared polymer grout, mend the honeycomb and scale on the flat adhesive surface;
2) paste sealing material of the present invention
Brushing one deck polyether-type monocomponent polyurethane adhesive on the adhesive surface of the concrete binding face of aqueduct body (5) and sealing material (4) is bonding with sealing material and aqueduct expansion joints adhesive surface then respectively, fixes with template;
Perhaps before pasting sealing material, lay tar sand plate or plastic foam back lining materials (7) earlier;
3) form removal
Temperature during according to construction is determined the form removal time;
4) make protective layer
Smooth for guaranteeing aqueduct body (5) flow surface, need after sealing material (4) stickup is finished, to do protective layer, do protective layer with elastic mortar (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115634 CN1219844C (en) | 2002-03-26 | 2002-03-26 | Sealant for sealing expansion joint of aqueduct bridge, its preparation method and operation methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115634 CN1219844C (en) | 2002-03-26 | 2002-03-26 | Sealant for sealing expansion joint of aqueduct bridge, its preparation method and operation methods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1446873A CN1446873A (en) | 2003-10-08 |
| CN1219844C true CN1219844C (en) | 2005-09-21 |
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ID=28048620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02115634 Expired - Fee Related CN1219844C (en) | 2002-03-26 | 2002-03-26 | Sealant for sealing expansion joint of aqueduct bridge, its preparation method and operation methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1219844C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5565618B2 (en) * | 2010-05-11 | 2014-08-06 | Ｄｉｃ株式会社 | Two-component thermosetting urethane resin composition for optics and optical molded article obtained using the same |
| CN103788738A (en) * | 2014-01-20 | 2014-05-14 | 南通东南公路工程有限公司 | Polyurethane asphalt waterproof material |
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2002
- 2002-03-26 CN CN 02115634 patent/CN1219844C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1446873A (en) | 2003-10-08 |
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