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介绍了一种无碱液态水泥混凝土速凝剂(简称SK速凝剂)的生产工艺及其性能等技术特点。性能测试结果表明,SK速凝剂掺量为8.75%时可使P.O42.5水泥的初凝时间缩短至2min15s,终凝时间7min50s,1d抗压强度达到20.7MPa,28d抗压强度保留率为102.3%。同样掺量时可使JC477—2005《喷射混凝土用速凝剂》的基准水泥的初凝时间缩短至2min,终凝时间缩短至7min30s,1d抗压强度达到22.0MPa,28d抗压强度保留率为108.7%,是一种性能优良的无碱速凝剂。
The production technology and performance of alkali-free liquid cement concrete quick-setting agent (referred to as SK quick-setting agent) are introduced. The results of performance test show that the initial setting time of P.O42.5 cement can be shortened to 2min15s, the final setting time of 7min50s, the compressive strength of 1d to 20.7MPa, the compressive strength retention rate of 28d 102.3%. The same dosage can make JC477-2005 “quick-setting agent for shotcrete” initial setting time shortened to 2min, the final setting time shortened to 7min30s, 1d compressive strength reached 22.0MPa, 28d compressive strength retention rate of 108.7%, is an excellent alkali-free accelerator.