摘要
探讨NaCl与乙二醇复合对粉煤灰不同时期火山灰活性的影响。结果表明:将一定掺量的NaCl与乙二醇复合掺入,可以不同程度地提高粉煤灰早期、中期与后期的火山灰活性。其中早期的激发作用效果最大,后期的激发作用效果最小。且随着粉磨时间的延长,各水泥试样的3 d、7 d及28 d抗压强度比值均有明显的提高,但其增幅下降。无论是否粉磨及粉磨时间长短,将一定掺量的NaCl与乙二醇复合对粉煤灰不同时期火山灰活性的激发作用效果均优于单掺NaCl或乙二醇;当NaCl掺量为1.00%,乙二醇掺量为0.06%进行复掺时,其对粉煤灰不同时期火山灰活性的激发作用效果最大。
The effect of sodium chloride combined with ethylene glycol on the pozzolanic activity of fly ash at different stage were investigated.The results show that the pozzolanic activity of fly ash at early stage,middle stage and later stage can be improved in different extent by adding proper content of sodium chloride combined with ethylene glycol to cement.The exciting effect of sodium chloride combined with ethylene glycol at early stage is the best and that at later stage is the worst.The compressive strength ratio at 3d,7d and 28d of each cement sample can be improved obviously,but the increasing rate of strength of each cement sample reduces with the increasing of grinding time.Whether grinded or nor,and how long grinding time is,the exciting effect of sodium chloride combined with ethylene glycol at different stage is better than that of only sodium chloride or ethylene glycol.When the content of 1% sodium chloride and 0.06% ethylene glycol is admixed,the exciting effect of sodium chloride combined with ethylene glycol on the pozzolanic activity of fly ash at different stag is the best.
出处
《粉煤灰》
2011年第2期8-10,13,共4页
Coal Ash China
关键词
NACL
乙二醇
粉煤灰
火山灰活性
sodium chloride
ethylene glycol
fly ash
pozzolanic activity
