Waterproof material for cement concrete bridge floor and preparation method of waterproof material

A technology of cement concrete and waterproof materials, applied in asphalt coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as single composition structure, poor high temperature resistance, and pavement layer shifting, and achieve firm bonding and smooth construction The operation is safe and convenient, and the effect of reducing the damage of the bridge structure

Active Publication Date: 2013-04-17

重庆市智翔铺道技术工程有限公司

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AI-Extracted Technical Summary

Problems solved by technology

Among them, water-emulsion waterproof coatings, such as APP modified asphalt materials, neoprene asphalt, etc., have a single composition structure, and the bonding strength with the cement concrete bridge deck is low. void phenomenon, resulting in surface waves...

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Abstract

The invention relates to a waterproof material for a cement concrete bridge floor and a preparation method of the waterproof material. The waterproof material is obtained by the following steps of: generating amino methyl acid ester by using isocyanate and compound polyalcohol, then adding ordinary heavy-traffic paving asphalt, and compounding and modifying by a tertiary amine catalyst, a compound antifoaming agent and ethyl acetate. The waterproof material can be firmly bonded with the cement concrete bridge floor, the resistance to high temperature and low temperature is good, the waterproof material can undergo comprehensive function requirements of temperature transforming and long-term loading, the destruction of the bridge structure caused by water seepage is alleviated, the service life of the road bridge is prolonged, the construction operation is safe and simple, the construction speed is high, the film forming time is short, the requirement on bridge floor construction is not high, and the construction can be carried out fast. The preparation method of the waterproof material is simple and easy to operate, the isocyanate, the compound polyalcohol and the ethyl acetate in a dehydrated state are not decomposed or oxidized in vacuum, so that the stability of each component is guaranteed and the prepared waterproof material has high solid content and good material performance.

Application Domain

Polyurea/polyurethane coatingsBituminous coatings

Technology Topic

Ethyl acetateIsocyanate compound +9

Image

Examples

Experimental program(3)
Effect test(1)

Example Embodiment

[0022] Example 1: A waterproof material for cement concrete bridge deck, the waterproof material is formed from 4,4-diphenylmethane diisocyanate MDI and composite polyol to generate urethane, and then adds No. 70 ordinary heavy-cross asphalt It is compounded and modified by stannous octoate, compound defoamer and ethyl acetate;

[0023] The composite polyol oxidized polypropylene diol and oxidized polypropylene triol are mixed in a mass ratio of 3:1, the isocyanate group of the 4,4-diphenylmethane diisocyanate MDI and the hydroxyl group in the composite polyol are The molar ratio is controlled to be 3:1.

[0024] The composite defoamer is Ca(OH)2 and emulsified silicone oil in a mass ratio of 1:1, and an amount of 0.4% of the isocyanate.

[0025] The amount of the No. 70 common heavy-cross asphalt is 80% of the urethane;

[0026] Described stannous octoate consumption is 0.5% of isocyanate;

[0027] A method for preparing a waterproof material for a cement concrete bridge deck, the steps of which are as follows: after mixing the above-mentioned oxidized polypropylene glycol and oxidized polypropylene triol 3:1 with No. 70 ordinary heavy-cross asphalt, add it into a reaction kettle, and vacuumize (make the When the vacuum degree reaches 0~0.05MPa), dehydrate at 120 °C for 1 hour, and then cool down to 40 °C; add the vacuum dehydrated 4,4-diphenylmethane diisocyanate MDI, stannous octoate, and composite defoamer into the reaction kettle Then, the temperature was raised to 70°C, and the reaction was performed for 2 hours; then the dehydrated ethyl acetate was added to the reaction kettle, and the temperature was kept at 40°C to 60°C for 0.5h;

Example Embodiment

[0028] Embodiment 2: A kind of waterproof material for cement concrete bridge deck, the waterproof material is made of toluene diisocyanate TDI and composite polyol to generate urethane, and then add No. 90 ordinary heavy-cross asphalt, dibutyltin dilaurate, Compound defoamer and ethyl acetate compound modification;

[0029] The composite polyol oxidized polypropylene diol and oxidized polypropylene triol are mixed in a mass ratio of 2:1, and the molar ratio of the isocyanate group of the toluene diisocyanate TDI to the hydroxyl group in the composite polyol is controlled to be 5:1 .

[0030] The composite defoamer is Ca(OH)2 and emulsified silicone oil in a mass ratio of 1:1, and an amount of 0.5% of the isocyanate.

[0031] The amount of the No. 90 common heavy-cross asphalt is 85% of the urethane;

[0032] Described dibutyltin dilaurate consumption is 0.6% of isocyanate;

[0033] A method for preparing a waterproof material for a cement concrete bridge deck, the steps of which are as follows: after mixing the above-mentioned oxidized polypropylene glycol and oxidized polypropylene triol 2:1 with No. 90 ordinary heavy-cross asphalt, add it into a reaction kettle, and vacuumize (make the When the vacuum degree reaches ?~?Pa), dehydrate at 120 °C for 1 h, and then cool down to 40 °C; add the vacuum dehydrated toluene diisocyanate TDI, dibutyltin dilaurate, and the composite defoamer into the reaction kettle, and heat up. to 75°C, react for 1.5h; then add dehydrated ethyl acetate into the reaction kettle, keep at 40°C to 60°C for 1h; discharge and seal with nitrogen protection.

Example Embodiment

[0034] Example 3: A waterproof material for cement concrete bridge deck, the waterproof material is formed from 4,4-diphenylmethane diisocyanate MDI and composite polyol to generate urethane, and then adds No. 90 ordinary heavy-cross asphalt Modified by stannous octoate and dibutyltin dilaurate, composite defoamer and ethyl acetate;

[0035] The composite polyol oxidized polypropylene diol and oxidized polypropylene triol are mixed in a mass ratio of 4:1, and the isocyanate group of the 4,4-diphenylmethane diisocyanate MDI and the hydroxyl group in the composite polyol are The molar ratio was controlled to be 4:1.

[0036] The composite defoamer is Ca(OH)2 and emulsified silicone oil in a mass ratio of 1:1.3, and an amount of 0.3% of the isocyanate.

[0037] The amount of the No. 90 common heavy-cross asphalt is 75% of the urethane;

[0038] Described dibutyltin dilaurate consumption is 0.6% of isocyanate;

[0039]A preparation method of waterproof material for cement concrete bridge deck, the steps of which are as follows: after mixing the above-mentioned oxidized polypropylene glycol and oxidized polypropylene triol 4:1 with No. 90 ordinary heavy-cross asphalt, add it into a reaction kettle, and vacuumize (make the When the vacuum degree reaches 0~0.05Pa), dehydrate at 100 °C for 1 hour, and then cool down to 30 °C; add the vacuum dehydrated toluene diisocyanate TDI, dibutyltin dilaurate, and the composite defoamer into the reaction kettle, and heat up. to 65℃, react for 2.5h; then add dehydrated ethyl acetate into the reaction kettle, keep at 40℃~60℃ for 0.5h;

[0040] Table 1 is the waterproof material obtained according to the preparation method of the waterproof material for cement concrete bridge deck described in Examples 1, 2 and 3, and the performance index tested according to the requirements of the JC/T975-2005 standard of "Waterproof Coatings for Roads and Bridges".

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Strong bond
Strong high and low temperature resistance

Waterproof material for cement concrete bridge floor and preparation method of waterproof material

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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