High-performance concrete containing composite fibers
A high-performance concrete, composite fiber technology, applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, textiles and papermaking, etc. , The effect of reducing water seepage capacity and improving solubility
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Embodiment 1
[0031] The concrete preparation process of water-soluble epoxy resin is as follows:
[0032] Step 1: Add 1.51kg glycidyltrimethylammonium chloride into water, then add 1.08kg oxalic acid and 300g triethylamine to it, heat up to 90-120°C for reflux reaction for 10-12h, and then carry out vacuum distillation to remove the Catalyst triethylamine and unreacted complete oxalic acid, obtain product A;
[0033] Step 2: Add 1kg of the product A prepared in step 1 into 15L of thionyl chloride, then raise the temperature to 80-90°C for reflux reaction for 6-7h, and then distill under reduced pressure to remove the unreacted thionyl chloride. Product B is obtained;
[0034] Step 3: Weigh 1.26kg of phloroglucinol and add it to 30L of pyridine, add 6.83kg of the product B prepared in step 2 to it at the same time, react at 50-60°C for 8-10h, heat up and evaporate to recover the solvent pyridine, and then obtain After the crystals of the crystals were washed with saturated sodium chloride...
Embodiment 2
[0037] The specific preparation process of the polyammonated modified composite fiber is as follows:
[0038] ①Add 1.42kg of glycidyl methacrylate into 20L of methanol solution, then add 1.32kg of melamine into it, heat up to 65-70°C, reflux and stir for 5-6h, then distill off the solvent under reduced pressure to obtain a solid product, adding the obtained solid product into acetone, stirring and dissolving, and then filtering to remove undissolved melamine, and then evaporating and crystallizing the filtrate to obtain polyaminomethacrylic acid monomer;
[0039] ②Add 3.22kg of the polyaminomethacrylic acid monomer prepared in step ① into 20L of acetone, and add 1.31kg of azobisisobutyronitrile initiator to it at the same time, then pass nitrogen into the reaction vessel for 30-40min, stop the aeration Nitrogen, heat up to 90-95°C and reflux, then add 1.43kg of trifluoroethyl methacrylate and 1kg of acrylamide solution with a concentration of 70-75% dropwise to the reaction ve...
Embodiment 3
[0041] The specific preparation process of the polyammonated modified composite fiber is as follows:
[0042] ①Add 1.42kg of glycidyl methacrylate into 20L of methanol solution, then add 1.32kg of melamine into it, heat up to 65-70°C, reflux and stir for 5-6h, then distill off the solvent under reduced pressure to obtain a solid product, adding the obtained solid product into acetone, stirring and dissolving, and then filtering to remove undissolved melamine, and then evaporating and crystallizing the filtrate to obtain polyaminomethacrylic acid monomer;
[0043] ②Add 2.14kg of the polyaminomethacrylic acid monomer prepared in step ① into 20L of acetone, and at the same time add 1.31kg of azobisisobutyronitrile initiator, and then pass nitrogen into the reaction vessel for 30-40min, stop the aeration Nitrogen, warming up to 90-95°C for reflux, then adding 1.12kg of trifluoroethyl methacrylate and 0.87kg of acrylamide solution with a concentration of 70-75% dropwise into the re...
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