Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of drying conditions on autogenous shrinkage in ultra-high performance concrete at early-age
Abstract This experimental study investigated the effects of drying conditions on the autogenous shrinkage of ultra-high performance concrete (UHPC) at early-ages. UHPC specimens were exposed to different temperatures, namely, 10, 20 and 40°C under a relative humidity (RH) ranging from 40 to 80%. The effects of using a shrinkage-reducing admixture (SRA) and a superabsorbent polymer (SAP) as shrinkage mitigation methods were also investigated. The results show that autogenous and drying shrinkage are dependent phenomena. Assuming the validity of the conventional superposition principle between drying and autogenous shrinkage led to overestimating the actual autogenous shrinkage under drying conditions; the level of overestimation increased with decreasing RH. Both SRA and SAP were very effective in reducing autogenous shrinkage under sealed conditions. However, SRA was efficient in reducing drying shrinkage under drying conditions, while SAP was found to increase drying shrinkage. Generally, results indicate that adequate curing is essential for reducing shrinkage in UHPC even when different shrinkage mitigation methods are applied.
Effect of drying conditions on autogenous shrinkage in ultra-high performance concrete at early-age
Abstract This experimental study investigated the effects of drying conditions on the autogenous shrinkage of ultra-high performance concrete (UHPC) at early-ages. UHPC specimens were exposed to different temperatures, namely, 10, 20 and 40°C under a relative humidity (RH) ranging from 40 to 80%. The effects of using a shrinkage-reducing admixture (SRA) and a superabsorbent polymer (SAP) as shrinkage mitigation methods were also investigated. The results show that autogenous and drying shrinkage are dependent phenomena. Assuming the validity of the conventional superposition principle between drying and autogenous shrinkage led to overestimating the actual autogenous shrinkage under drying conditions; the level of overestimation increased with decreasing RH. Both SRA and SAP were very effective in reducing autogenous shrinkage under sealed conditions. However, SRA was efficient in reducing drying shrinkage under drying conditions, while SAP was found to increase drying shrinkage. Generally, results indicate that adequate curing is essential for reducing shrinkage in UHPC even when different shrinkage mitigation methods are applied.
Effect of drying conditions on autogenous shrinkage in ultra-high performance concrete at early-age
Soliman, A. M. (Autor:in) / Nehdi, M. L. (Autor:in)
2010
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Effect of drying conditions on autogenous shrinkage in ultra-high performance concrete at early-age
| Online Contents | 2010
Effect of drying conditions on autogenous shrinkage in ultra-high performance concrete at early-age
| British Library Online Contents | 2011
Effect of drying conditions on autogenous shrinkage in ultra-high performance concrete at early-age
| Online Contents | 2011
Effect of drying conditions on autogenous shrinkage in ultra-high performance concrete at early-age
| Springer Verlag | 2010
AUTOGENOUS SHRINKAGE OF SELF-COMPACTING ULTRA-HIGH PERFORMANCE CONCRETE(UHPC)
| British Library Conference Proceedings | 2003