Concrete admixture and concrete
A concrete admixture and concrete technology, applied in the field of building materials, can solve the problems of low concrete strength, short service life, small water permeability coefficient, etc., and achieve the effects of improving durability, improving work performance, and reducing cement consumption
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Embodiment 1
[0030] A preparation method of 4-amino-1-butylpyridine chloride salt ionic liquid is as follows: 4-aminopyridine is dissolved in acetonitrile, heated to reflux in an oil bath at 65°C, and then 1-chlorobutane and 4-aminopyridine are added dropwise. The molar ratio with 1-chlorobutane was 1:1.5, and condensed and refluxed for 12 hours under the protection of nitrogen to obtain 4-amino-1-butylpyridinium chloride salt ionic liquid.
[0031] The preparation method of described graphene oxide-glass fiber-pyridine ionic liquid composite material, comprises the steps:
[0032] S1. Weigh 1g of graphite powder and mix it with 50mL of strong oxidizing acid, treat it under 80kHz ultrasonic wave for 4 hours, then heat it to 80°C, add 100g of dry glass fiber, stir and reflux for 24 hours, centrifuge, and wash the solid with water to medium properties, vacuum drying at 60°C to obtain carboxylated graphene oxide-glass fiber composites;
[0033]S2, adding the carboxylated graphene oxide-glass...
Embodiment 2
[0039] A preparation method of 4-amino-1-butylpyridinium chloride salt ionic liquid is the same as that of Example 1.
[0040] The preparation method of described graphene oxide-glass fiber-pyridine ionic liquid composite material, comprises the steps:
[0041] S1. Weigh 1g of graphite powder and mix it with 200mL of strong oxidizing acid, treat it under 60kHz ultrasonic wave for 3 hours, then heat it to 60°C, add 1g of dry glass fiber, stir and reflux for 12 hours, centrifuge, wash the solid with water until medium properties, vacuum drying at 60°C to obtain carboxylated graphene oxide-glass fiber composites;
[0042] S2, adding the carboxylated graphene oxide-glass fiber composite material obtained in step S1 to 0.01mol L -1 In NaOH solution, the solid-to-liquid ratio is 1.8mg: 1mL, stirred for 2h, centrifuged, washed with water until neutral, and dried in vacuum at 60°C to obtain an alkalized graphene oxide-glass fiber composite material;
[0043] S3, adding the 4-amino-1...
Embodiment 3
[0048] A preparation method of 4-amino-1-butylpyridinium chloride salt ionic liquid is the same as that of Example 1.
[0049] The preparation method step of described graphene oxide-glass fiber-pyridine ionic liquid composite material is as follows:
[0050] S1. Weigh 1g of graphite powder and mix it with 10 3mL of strong oxidizing acid, treat it under 70kHz ultrasonic wave for 6 hours, then heat it to 90°C, add 1000g of dry glass fiber, stir and reflux for 48 hours, centrifuge, and wash the solid with water until Neutral, vacuum drying at 60°C to obtain carboxylated graphene oxide-glass fiber composites;
[0051] S2. Add the carboxylated graphene oxide-glass fiber composite material obtained in step S1 into 0.01mol L-1NaOH solution, the solid-to-liquid ratio is 1.5mg:1mL, stir for 2h, centrifuge, wash the solid with water until neutral, 60°C Under vacuum drying, promptly obtain the graphene oxide-glass fiber composite material of alkalized form;
[0052] S3, adding the 4-a...
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