早强剂的制备及评价

以ＡＭＰＳ（２－丙烯酰胺基－２－甲基丙磺酸）、二乙醇胺和硝酸钙为主要原料，利用正交试验设计的方法系统考察了早强剂的复配，以及早强剂对水泥浆性能的影响、水泥浆的稠化时间和其他外加剂的配伍性，并且通过ＸＲＤ和ＳＥＭ 等手段表征了早强剂的结构，并对该早强剂的早强效果及抗压效果进行了检测。结果表明：掺有质量分数５％早强剂的水泥石在１、３和７ｄ的抗压强度比原浆水泥石分别提高了１５．２％、１４．３％和１６．７％，在抗高温性能方面也得到了较大提高.

Preparation and Characterization of Early Strength Accelerator

AMPS,diethanolamine,and calium nitrate as materials of early-strength accelerator were prepared and characterized.Orthogonal experiment was utilized to optimize optimum content of early-strength accelerator.The samples were characterized with powder X-ray diffraction(XRD) and SEM.It is shown that when the weight of 5% early agents were introduced,the 1,3 and 7 d of cement strength improved by 15.2%、14.3%、16.7%,respectively,which is also a further development in the high temperature.