A kind of internal curing agent for airport pavement and preparation method thereof
A curing agent and pavement technology, which is applied in the field of airport pavement mixing curing agent and its preparation, can solve the problems of short curing time, general curing effect, incompetence for airport cement concrete pavement maintenance, etc., to improve the compactness, The effect of reducing maintenance costs
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[0018] The preparation method of described modified diatomite comprises:
[0019] 1).Drying and pulverizing diatomite to obtain diatomite powder;
[0020] 2). Mix diatomite powder and water according to the mass ratio of 1:8~12, heat to 80°C~85°C and pre-stir for 20~25 minutes, then add diatomite powder drop by drop while stirring Polyisobutylene with a mass of 2.5-5% and diatomite powder with a mass of ethylene oxide and propylene oxide block copolyether with a mass of 25%-30%, continue stirring at 80°C-85°C and ultrasonic treatment at 25-30k Hz for 2 ~ 4 hours to obtain viscous liquid;
[0021] 3). The viscous liquid is centrifuged, washed with deionized water, dried and ball milled to obtain the modified diatomite.
[0022] Most of the small holes inside the diatomite-based superabsorbent ceramic particles and the small holes on the pipe wall are microns below the micron level, which has excellent water absorption performance and can absorb more than 4 times its own weigh...
Embodiment 1
[0044] The preparation method of the internal curing agent used for airport pavement provided by this embodiment is as follows:
[0045] (1) Material preparation, bake diatomite in an oven at 100°C for 4 hours, then ball mill and pulverize to 220 mesh to obtain diatomite powder;
[0046] Mix the diatomite powder and water according to the mass ratio of 1:8, heat to 80°C and pre-stir for 25 minutes, then add 20,000-30,000 molecular weight polymers with a mass of 2.5% of the mass of the diatomite powder drop by drop while stirring. Isobutylene and diatomaceous earth powder mass 30% ethylene oxide propylene oxide block copolyether, continue to stir at 85 ° C and 25k Hz ultrasonic treatment for 2 hours to obtain a viscous liquid;
[0047]The ethylene oxide and propylene oxide block copolyether has a relative molecular mass of 80,000 and is obtained by alkoxylation of 70 parts by weight of ethylene oxide and 30 parts by weight of propylene oxide.
[0048] The modified diatomite is...
Embodiment 2
[0056] The preparation method of the internal curing agent used for airport pavement provided by this embodiment is as follows:
[0057] (1) Material preparation, bake the diatomite in an oven at 300°C for 2 hours, then ball mill and pulverize it to 260 mesh to obtain diatomite powder;
[0058] Mix the diatomite powder and water according to the mass ratio of 1:12, heat to 85°C and pre-stir for 20 minutes, then add 8,000-10,000 molecular weight polymers with a mass of 5% of the mass of the diatomite powder drop by drop while stirring. Isobutylene and diatomite powder mass 25% ethylene oxide propylene oxide block copolyether, continue to stir at 80 ° C and 30k Hz ultrasonic treatment for 4 hours to obtain a viscous liquid;
[0059] The ethylene oxide and propylene oxide block copolyether has a relative molecular mass of 150,000 and is obtained by alkoxylation of 90 parts by weight of ethylene oxide and 10 parts by weight of propylene oxide.
[0060] The modified diatomite is o...
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