Composite pavement bonding material and preparation method thereof and waterproof crack resistant layer

A composite pavement and bonding material technology, applied in the field of pavement construction materials, can solve the problems of reducing crack resistance and affecting the structural integrity of polyester fiberglass cloth and pavement

Active Publication Date: 2017-05-31
江苏北极星交通产业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the waterproof and anti-cracking of composite pavements (such as tunnels) is usually constructed with polyester fiberglass cloth, specifically by spraying the viscous oil asphalt in advance, and after the viscous oil is sprayed, the polyester fiberglass cloth is sprayed. However, in the quality control process of construction, due to the complex environment inside the tunnel, it is inevitable that due t

Method used

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  • Composite pavement bonding material and preparation method thereof and waterproof crack resistant layer

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preparation example Construction

[0046] The preparation method of the adhesive material of the present invention is prepared by mixing high polymer adhesive and self-repairing microcapsules.

[0047] In the above preparation method, a preparation method of PUA adhesive can be provided. The method comprises the following steps: (1) polycondensing polyether polyol and polyisocyanate to obtain a polyurethane prepolymer; (2) reacting the polyurethane prepolymer and polyacrylate while adding a chain extender.

[0048] In the preparation method of the PUA adhesive, the polyether polyol is an oligomer whose main chain contains an ether bond (—R—O—R—), and whose end group or side group contains more than 2 hydroxyl groups (—OH). The polyether polyol can be polyoxypropylene polyol, polymer polyol, polytetrahydrofuran and its copolyether polyol, polyethylene oxide polyol.

[0049] The above-mentioned polyisocyanates refer to isocyanates containing two NCO groups. Examples thereof include difunctional isocyanate compo...

Embodiment 1

[0064] Step 1, preparing polyurethane-acrylate adhesive. Take a certain amount of polyether polyol and put it in the reactor of the device stirrer, heater and temperature sensor, stir rapidly and raise the temperature to about 90°C, connect the vacuum device, continue to heat up to 110°C and keep it warm, vacuum dehydration for 2 hours, Then cool it down to about 50°C, stop vacuuming, add diphenylmethane diisocyanate, first stir rapidly to let it heat up naturally, after the temperature is stable, slowly raise the temperature and control the reaction temperature at 75°C, react for about 4 hours, wait for the reaction After completion, a vacuum device is connected to carry out vacuum degassing, and the obtained polyurethane prepolymer is sealed and stored for later use. Then, mix the polyurethane prepolymer and polyacrylate at a mass ratio of 1:0.4, add a chain extender, and stir quickly to make it fully react to obtain a polyurethane-acrylate adhesive.

[0065] Step 2, prepar...

Embodiment 2

[0069] Step 1, preparing polyurethane-acrylate adhesive. Take a certain amount of polyether polyol and place it in the reactor with stirrer, heater and temperature sensor, stir rapidly and heat up to about 90°C, connect the vacuum device, continue to heat up to 110°C and keep it warm, vacuum dehydration for 2 hours, Then cool it down to about 50°C, stop vacuuming, add diphenylmethane diisocyanate, first stir quickly to let it heat up naturally, after the temperature is stable, slowly raise the temperature and control the reaction temperature at 85°C, react for about 2 hours, and wait for the reaction After completion, a vacuum device is connected to carry out vacuum degassing, and the obtained polyurethane prepolymer is sealed and stored for later use. Then, mix the polyurethane prepolymer and polyacrylate at a mass ratio of 1:0.6, add a chain extender, and stir quickly to make it fully react to obtain a polyurethane-acrylate adhesive.

[0070] Step 2, preparing self-healing ...

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Abstract

The invention discloses a composite pavement bonding material and a preparation method thereof and a waterproof crack resistant layer. The bonding material comprises a high polymer adhesive and a self-repairing microcapsule. A high polymer adhesive waterproof layer is capable of effectively preventing underground water from entering an asphalt upper layer through cement concrete base cracks to avoid damaging an asphalt surface layer. The self-repairing microcapsule is infiltrated into a cement concrete panel hole and is capable of delaying further expansion of cement concrete diseases through the repairing action. The waterproof crack resistant layer comprises a polyester glass fiber fabric crack resistant layer, at least one bonding layer and at least one stripping layer, wherein the bonding layer is prepared from the bonding material and is arranged on at least one surface of polyester glass fiber fabric; and the at least one stripping layer is arranged on the surface of the bonding layer. When the waterproof crack resistant layer is in use, only the stripping layer needs to be torn and is attached to a cement concrete pavement.

Description

technical field [0001] The invention relates to the technical field of pavement construction materials, in particular to an adhesive material for a composite pavement, a preparation method thereof, and a waterproof and crack-resistant layer. Background technique [0002] At present, the composite pavement mainly used in highway tunnels is mainly cement concrete + asphalt concrete composite pavement. The development of cracks in the cement concrete panel in the tunnel is one of the main reasons for the early failure of the composite pavement. The existence of cracks greatly reduces the structural strength and integrity of the pavement pavement in the tunnel. The bending-tensile stress and shear stress, the vertical displacement of the concrete slab in the vertical direction, and the external temperature cycle will cause the shrinkage and expansion of the concrete slab to generate horizontal displacement, and the bending-tensile stress produced by it exceeds the allowable valu...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/08C08G18/48C08G18/62C08G18/10E01C7/35
CPCC08G18/10C08G18/48C08L2205/035C09J11/08C09J175/08E01C7/185E01C7/187E01C7/35E01C7/356C08G18/62C08L89/00C08L63/00C08L5/00
Inventor 商健林方博文李强王永辉张华丽张帅
Owner 江苏北极星交通产业集团有限公司
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