NDLI: Effect of drying conditions on autogenous shrinkage in ultra-high performance concrete at early-age

Content Provider	Springer Nature Link
Author	Soliman, A. M. Nehdi, M. L.
Copyright Year	2010
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.
Starting Page	879
Ending Page	899
Page Count	21
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	44
Issue Number	5
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-11-02
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Early-age Drying Autogenous Shrinkage Strain Chemically bound water Materials Science Structural Mechanics Building Materials Civil Engineering Theoretical and Applied Mechanics Operating Procedures, Materials Treatment
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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