PROPERTIES AT EARLY AGES AND STRENGTH DEVELOPMENT OF HOT CONCRETE FOR COLD WEATHER CONCRETING / 寒中ホットコンクリートの初期性状と圧縮強度増進性状
- Resource Type
- Journal Article
- Authors
- Koto RYU; Osamu KATSURA; Toshiyuki YOSHINO; Yukio HAMA; 劉 宏涛; 吉野 利幸; 桂 修; 浜 幸雄
- Source
- 日本建築学会構造系論文集 / Journal of Structural and Construction Engineering (Transactions of AIJ). 2001, 66(542):55
- Subject
- cold weather concreting
hot concrete
slump-loss
strength development
superplasticizer
スランプロス
ホットコンクリート
寒中コンクリート
強度増進
高性能AE減水剤
- Language
- Japanese
- ISSN
- 1340-4202
1881-8153
The aim of this study is to investigate the applicability of hot concrete to cold weather concreting. We carried out some experiments about the mix design, the properties at early ages, i.e. slump-loss and setting time, and the strength development of hot concrete for applying cold weather concreting. The use of superplasticizer is necessary to reduce the unit water content of hot concrete. The strength development of the hot concrete using superplasticizer is much the same as that of ordinary concrete. It was clarified that the slump retention type or the retardation type superplasticizer are effective to decrease the slump-loss of hot concrete and the average temperature of concrete for 60 minutes after mixing must be made less than 30℃.