Concrete air entraining agent and preparation method thereof
An air-entraining agent and concrete technology, applied in the field of building materials, can solve the problems of unreasonable bubble structure, inability to effectively improve the workability of fresh concrete, unstable bubbles, etc., and achieve the effect of improving workability and hardening durability.
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Embodiment 1
[0021] In terms of parts by mass, 100.0g limonene, 10.0g oleic acid, 5.0g 2-methylene succinic anhydride, and 2.5g tert-butyl hydroperoxide were put into the reactor, and nitrogen was charged at the same time, and the temperature was controlled at 105°C. Carry out radical thermal polymerization and esterification under stirring for 5 hours; add 185.0g of water and heat until the solution boils; slowly add 6.5g of calcium hydroxide and carry out saponification for 3 hours; after the reaction is completed, cool to room temperature to obtain entrained gas The finished product has a weight concentration of 39.5%.
Embodiment 2
[0023] In parts by mass, 80.0g terpinolene, 12.0g oleic acid, 5.0g dodecenylsuccinic anhydride, 1.0g cumene hydroperoxide were dropped into the reactor, and nitrogen was charged at the same time, and the temperature was controlled at 100 ℃, carry out free radical thermal polymerization and esterification under stirring for 5 hours; add 180.0g of water, and heat until the solution boils; slowly add 15.0g of potassium hydroxide, and carry out saponification reaction for 1 hour; after the reaction is completed, cool to room temperature to obtain The finished air-entraining agent has a weight concentration of 38.5%.
Embodiment 3
[0025] In terms of parts by mass, 70.0g phellandrene, 16.0g linoleic acid, 6.0g itaconic anhydride, 3.0g tert-butyl hydroperoxide were put into the reaction kettle, filled with nitrogen at the same time, the temperature was controlled at 115°C, and stirred Carry out free radical thermal polymerization and esterification for 4 hours; add 170.0g of water, and heat until the solution boils; slowly add 12.5g of sodium hydroxide, and carry out saponification for 2 hours; after the reaction, cool to room temperature to obtain the finished air-entraining agent , The weight concentration is 38.7%.
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