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A METHOD FOR PREPARING HIGH-EARLY-STRENGTH FIBER REINFORCED CEMENT COMPOSITES AND HIGH-EARLY-STRENGTH FIBER REINFORCED CEMENT COMPOSITES PREPARING FROM THE METHOD
A METHOD FOR PREPARING HIGH-EARLY-STRENGTH FIBER REINFORCED CEMENT COMPOSITES AND HIGH-EARLY-STRENGTH FIBER REINFORCED CEMENT COMPOSITES PREPARING FROM THE METHOD
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机译:制备高强度纤维增强水泥复合材料的方法及由该方法制备的高强度纤维增强水泥复合材料
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摘要
A preparing method of high-early fiber reinforced cement composite and a composite from the method are provided to reduce construction duration and to obtain better dimensional stability and longer durability by mixing strength-promoted binder, setting-promoted mixing water and fiber in the concrete. A preparing method of high-early fiber reinforced cement composite comprises steps of: mixing 10-20 parts by weight of silica fume, 100-120 parts by weight of sand having a diameter of up to 5mm which is manufactured in an absolute dry state at 100±5deg.C and 5-20 parts by weight of dry limestone with respect to 100 parts by weight of high-early fiber reinforced cement; preparing a strength-promoted binder by mixing the prepared mixture with 100 parts by weight of high-early fiber reinforced cement; subsequently or concurrently with the previous step, preparing setting-promoted mixing water by mixing 1-3% by weight of triethanolamine, 1-3% by weight of naphthalenic water-reducing agent and 94-98% by weight of distilled water; preparing cement composite by mixing the prepared setting-promoted mixing water and the prepared strength-promoted binder in a ratio of 0.15-0.25 for the water to the binder; and adding 1-3% by volume of reinforced fiber and/or organic fiber in the previously prepared cement composite. For preparing strength-promoted binder, the mixture is mixed at 20-40rpm for 10-20 minutes, followed by at about 10rpm for 3-5 minutes. The prepared setting-promoted water is mixed at 500-800rpm for about 3-5 minutes before preparing the cement composite. The prepared setting-promoted water and the prepared strength-promoted binder are mixed at 40-50rpm for about 5-7 minutes before mixing with the fibers. The mixture containing the fibers is mixed at 20-30rpm for about 1-2 minutes.
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