CN103666371A - Method for preparing blocking agent for filling deformation joints of high-speed railway concrete structure - Google Patents
Method for preparing blocking agent for filling deformation joints of high-speed railway concrete structure Download PDFInfo
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- CN103666371A CN103666371A CN201310716900.1A CN201310716900A CN103666371A CN 103666371 A CN103666371 A CN 103666371A CN 201310716900 A CN201310716900 A CN 201310716900A CN 103666371 A CN103666371 A CN 103666371A
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- polyether polyol
- blocking agent
- agent
- concrete structure
- plugging agent
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Abstract
The invention discloses a method for preparing a blocking agent for filling deformation joints of a high-speed railway concrete structure and solves the problems that a current blocking material is unreasonable in formula, the cementation effect is not good, and deformation joints are susceptible to water spraying, dropping and dropwise leaking after being blocked. The method comprises the following steps: taking 10 kg of isocyanate, adding the isocyanate to 15 kg of polyether polyol, and acquiring a polyurethane prepolymer after polycondensation reaction for 30 minutes; taking 15 kg of liquid polyether polyol, adding the liquid polyether polyol to 8 kg of petroleum distillate curing agent, and fusing for 1 hour to obtain cured polyether polyol; mixing the obtained polyurethane prepolymer with the obtained cured polyether polyol according to a mass ratio being 1:1.5, and manually stirring for 3-5 minutes to obtain the pasty blocking agent. The blocking agent has the characteristics of low preparation cost, simple preparation method, easiness in material taking on site, high whole cohesiveness after curing and high durability.
Description
Technical field
The present invention relates to a kind of compound method of plugging agent, the compound method of the plugging agent that particularly a kind of movement joint of pointing high-speed railway concrete structure is used.
Background technology
In high speed railway construction process, for the distortion that prevents that concrete structures from producing because of temperature Change and non-uniform settling, the position at concrete structure deformation sensitive during construction all will arrange movement joint.Movement joint is divided into expansion joint and two kinds of forms of settlement joint, and structures are divided into several relatively independent unit, and reserved movement joint can guarantee that concrete structures has enough deformation spaces.After having constructed, concrete structures all to carry out shutoff to movement joint, to guarantee the integrity of concrete structures structure.The pointing shutoff of movement joint is a very important link in the construction of high-speed railway concrete structure.Prior art is to adopt the plugging materials such as pitch hemp cut, pitch styrofoam to common movement joint shutoff; To the movement joint of high ferro railroad bridge roadbed road bed board, retaining structure, be to adopt with extruded polystyrene foaming material flitch fill and carry out joint seal with urethane; Tunnel-liner sedimentation and deformation seam is adopted to poly-sulphur sealing compound pointing shutoff.In existing High Speed Rail Projects construction, pointing to road bed board, Tunnel Lining Deformation seam, brushing bottom glue does not easily cause plugging material to peel off, and the unreasonable cementation effect that causes of the plugging material adopting formula is bad, after existing movement joint shutoff, all exist and emit water, come off and the phenomenon of water clock, railway operation safety has been arrived in serious threat.
Summary of the invention
The invention provides a kind of compound method of high-speed railway concrete structure movement joint pointing plugging agent, solved existing plugging material formula unreasonable, cementation effect is bad, easily occurs emitting water, comes off and the technical problem of water clock after movement joint shutoff.
The present invention solves above technical problem by the following technical programs:
A compound method for high-speed railway concrete structure movement joint pointing plugging agent, comprises the following steps:
The first step, get the isocyanic ester of 10 kilograms, join the polyether glycol of 15 kilograms, polycondensation obtained base polyurethane prepolymer for use as after 30 minutes;
Second step, get the liquid polyether glycol of 15 kilograms and join 8 kilograms of oil and heat up in a steamer in solidifying agent, fusedly within 1 hour, obtain curing polyether glycol;
The curing polyether glycol that the 3rd step, the base polyurethane prepolymer for use as that the first step is obtained obtain with second step mixes by the mass ratio of 1: 1.5, within hand mixing 3-5 minute, obtains the plugging agent of paste.
It is low that plugging agent of the present invention has preparation cost, and compound method is simple, and on-the-spot feeding is easy, solidifies rear whole cohesiveness strong, has good density, and weather resistance is not easy to produce and comes off, and has effectively prevented that movement joint from emitting the generation of water and weeping.
Embodiment
The concrete compound method of the present invention is as follows:
The first step, get the isocyanic ester of 10 kilograms, join the polyether glycol of 15 kilograms, polycondensation obtained base polyurethane prepolymer for use as after 30 minutes;
Second step, get the liquid polyether glycol of 15 kilograms and join 8 kilograms of oil and heat up in a steamer in solidifying agent, fusedly within 1 hour, obtain curing polyether glycol;
The curing polyether glycol that the 3rd step, the base polyurethane prepolymer for use as that the first step is obtained obtain with second step mixes by the mass ratio of 1: 1.5, and hand mixing obtains the plugging agent of paste for 3～5 minutes.
During plugging agent of the present invention preparation, will prevent entrained air, each batch mixing amount is unsuitable excessive and in 6-12 hour, use after mixing, stops after date use.This plugging agent cost is low, solidifies rear high resilience, can not shrink to produce because of the sedimentation of shutoff seam or concrete structure to come off after perfusion.
Use the Specific construction process of shutoff movement joint of the present invention as follows:
First, with little ash shovel or cleek, the sandstone in movement joint, earth are picked out, and blow down the dirt on concrete base layer in seam with pressurized air, then with broom, repeatedly clean seam inner concrete basic unit and seam both sides concrete base layer, until free from dust, its effect is the good sticking effect that guarantees plugging agent and basal plane.
The second, with the wide adhesive tape of papery, respectively the concrete base layer of movement joint both sides is pasted and protected, the wide adhesive tape of papery can not be pasted in movement joint.It is to avoid movement joint both sides to be defiled by plugging agent that isolation strip effect is protected in subsides.
The 3rd, with soft brush, 101 glue are applied on the concrete base layer face of the interior both sides of shutoff seam, then with rag, 101 glue are smeared evenly.The effect of 101 glue is in the filleting process of concrete extension joint, effectively improves the bonding strength between the basic unit's face in plugging agent and shutoff seam.
The 4th, 101 glue dries of smearing are after 30 minutes, and the top with the note seam rifle with air compressor machine by movement joint is injected into plugging agent in movement joint.
Five, owing to posting the wide adhesive tape of papery in advance on the basal plane of seam both sides, plugging agent after injection can be filled with opposite side from a side along gap, plugging agent enters and in sealing, produces sometimes bubble, available fiber board extend in movement joint the plugging agent of bubbles is smeared, to eliminate bubble, make plugging agent closely knit; Then use dry cake to decorate scraper the excessive plugging agent to movement joint both sides is wiped off, its effect is to guarantee that plugging agent and movement joint substrate surface are closely linked.
Six, in rapid hardening cement, mix appropriate silica powder and make joint seal agent.This joint seal agent has good sticking power with the bonding surface of the plugging agent of preparing.After plugging agent solidifies, joint seal agent is applied to the plugging agent surface in movement joint, the joint seal agent surface after smearing should be a little more than the concrete basal plane in movement joint both sides, and has certain lap width with both sides concrete surface.
Seven, to be deformed seam agent and solidify after, the wide adhesive tape of papery is removed carefully.
The present invention pulls out clinging power and detects on the spot by pulling, and the plugging agent adopting has the characteristic that the form of cohering is torn.Concrete detection method is as follows: first, and the plugging agent from a side group face to the opposite side lateral dissection of movement joint is solidified; Then along movement joint both sides basal plane, cut about 75 cm long; Finally, with hand-tight grab cut cram agent adhesive tape, with the direction of 90 degree, be pulled outwardly plugging agent adhesive tape, plugging agent adhesive tape can be torn with the integral body form of cohering.
Claims (1)
1. a compound method for high-speed railway concrete structure movement joint pointing plugging agent, comprises the following steps:
The first step, get the isocyanic ester of 10 kilograms, join the polyether glycol of 15 kilograms, polycondensation obtained base polyurethane prepolymer for use as after 30 minutes;
Second step, get the liquid polyether glycol of 15 kilograms and join 8 kilograms of oil and heat up in a steamer in solidifying agent, fusedly within 1 hour, obtain curing polyether glycol;
The curing polyether glycol that the 3rd step, the base polyurethane prepolymer for use as that the first step is obtained obtain with second step mixes by the mass ratio of 1: 1.5, and hand mixing 3-5 minute obtains the plugging agent of paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310716900.1A CN103666371A (en) | 2013-12-24 | 2013-12-24 | Method for preparing blocking agent for filling deformation joints of high-speed railway concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310716900.1A CN103666371A (en) | 2013-12-24 | 2013-12-24 | Method for preparing blocking agent for filling deformation joints of high-speed railway concrete structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103666371A true CN103666371A (en) | 2014-03-26 |
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| CN201310716900.1A Pending CN103666371A (en) | 2013-12-24 | 2013-12-24 | Method for preparing blocking agent for filling deformation joints of high-speed railway concrete structure |
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Citations (8)
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| DE2702905A1 (en) * | 1977-01-25 | 1978-07-27 | Eugen Richard Schlegel | Concrete-plastics composite boat hull - esp. of concrete filled with hydroxy gp.-contg. polyether, polyester and di:- and poly:isocyanate, reinforced by grid |
| US4143014A (en) * | 1977-11-09 | 1979-03-06 | The Upjohn Company | Novel compositions |
| US4630963A (en) * | 1984-09-05 | 1986-12-23 | Wyman Ransome J | Polymer concrete by percolation |
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| CN101906265A (en) * | 2010-07-05 | 2010-12-08 | 青岛理工大学 | Material for quickly repairing marine concrete in service and construction technology thereof |
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2013
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|---|---|---|---|---|
| DE2702905A1 (en) * | 1977-01-25 | 1978-07-27 | Eugen Richard Schlegel | Concrete-plastics composite boat hull - esp. of concrete filled with hydroxy gp.-contg. polyether, polyester and di:- and poly:isocyanate, reinforced by grid |
| US4143014A (en) * | 1977-11-09 | 1979-03-06 | The Upjohn Company | Novel compositions |
| US4630963A (en) * | 1984-09-05 | 1986-12-23 | Wyman Ransome J | Polymer concrete by percolation |
| CN1321717A (en) * | 2000-06-13 | 2001-11-14 | 中国科学院广州化学研究所 | Elastic polyurethane type concrete road joint glue and its preparation method |
| CN101805588A (en) * | 2010-03-05 | 2010-08-18 | 中科院广州化灌工程有限公司 | Polyurethane road caulking sealant with good durability and production process |
| CN101906265A (en) * | 2010-07-05 | 2010-12-08 | 青岛理工大学 | Material for quickly repairing marine concrete in service and construction technology thereof |
| CN103131162A (en) * | 2011-11-23 | 2013-06-05 | 新疆科能防水防护材料有限公司 | Specially-used enhanced polyurethane sealing water-stopping material and production method thereof |
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Application publication date: 20140326 |