A kind of polycarboxylate water reducer for permeable concrete and preparation method thereof
A technology of permeable concrete and polycarboxylate, which is applied in the field of urban pavement structure and polycarboxylate water reducer for concrete, which can solve the problems of weak cement and aggregate bonding, poor load bearing capacity, and runaway road surface. Achieve the effect of increasing the initial water reduction rate, improving the air-entraining state, and increasing the cohesion
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Embodiment 1
[0036] The polycarboxylic acid water-reducing agent for permeable concrete and its preparation method are polymerized by the following components, the total mass part is 1000, the preparation method is as follows:
[0037] 1. The first feed: 345 parts of 4000 molecular weight isopentenol polyoxyethylene ether, 3.0 parts of sodium hypophosphite, 2.0 parts of trifluoroethyl acrylate and 200 parts of water are added to the reactor, and continue to stir until The solution has no obvious lumps or flakes; measure the temperature in the kettle, control the temperature at 15°C, and put in 0.5 part of 27.5% industrial grade hydrogen peroxide and 2.0 parts of ammonium persulfate at one time;
[0038] 2. The second feeding: within 2-5 minutes of feeding, start to add the initiator and the small monomer solution successively; the initiator is composed of 0.8 parts of dicyclohexylcarbodiimide and 100 parts of water; after the initiator is added 6 Start dropping the small monomer solution within...
Embodiment 2
[0041] The polycarboxylic acid water-reducing agent for permeable concrete and its preparation method are polymerized by the following components, the total mass part is 1000, the preparation method is as follows:
[0042] 1. The first feed: 347 parts of 4000 molecular weight vinyl butyl ether polyoxyethylene ether, 43.5 parts of sodium hypophosphite, 1 part of 2,2,2-trifluoroethyl methacrylate and 220 parts of water are added Into the reaction kettle, continue to stir until the solution has no obvious lumps or flakes; measure the temperature in the kettle, control the temperature at 10°C, and put in 1.5 parts of 27.5% industrial grade hydrogen peroxide and 1.2 parts of ammonium persulfate at one time;
[0043] 2. The second feeding: within 2-5 minutes of feeding, start to add the initiator and the small monomer solution successively; the initiator is composed of 0.6 parts of N,N'-diisopropylcarbodiimide and 105 parts of water; Start to add the small monomer solution within 6-10 mi...
Embodiment 3
[0046] The polycarboxylic acid water-reducing agent for permeable concrete and its preparation method are polymerized by the following components, the total mass part is 1000, the preparation method is as follows:
[0047] 1. The first feeding: add 348 parts of 4000 molecular weight isopentenol polyoxyethylene ether, 4.0 parts of sodium hypophosphite, 2.5 parts of trifluoroethyl acrylate and 200 parts of water into the reactor, and continue to stir until The solution has no obvious lumps or flakes; measure the temperature in the kettle, control the temperature at 18°C, and put in 2.5 parts of 27.5% industrial grade hydrogen peroxide and 1.5 parts of ammonium persulfate at one time;
[0048] 2. The second feeding: within 2-5 minutes of feeding, start to add the initiator and the small monomer solution successively; the initiator consists of 0.4 parts of dicyclohexylcarbodiimide and 110 parts of water; after the initiator is added 6 Start dropping the small monomer solution within 10...
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