【摘要】 试验研究了蒸养制度中预养时间、恒温温度、恒温时间对激发剂改性超细粉煤灰混凝土强度的影响。试验结果表明对于铁路预应力Ⅲ型轨枕用混凝土,升温前成熟度不宜低于70℃h,恒温阶段宜控制在60℃下8h为宜。更多还原

【Abstract】 This paper presents the study on the effects of preset period, maximum temperature, and length of maximum temperature period on the strength of ultrafine fly ash concrete with additive. The results show that maturity of steamcured ultrafine fly ash concrete for railway prestress concrete sleeper would not below 70℃h before the end of the preset period, and the maximum temperature period should span 8 hours at 60℃ as well.更多还原