Experimental Analysis of Time-Dependent Law of Early Age Concrete Strain Considering Continuous Temperature Variation
QIN Yu,LIU Lai-jun,ZHI Xi-lan and ZHANG Liu-yu
DOI:10.11835/j.issn.1674-4764.2012.02.010
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2012,Pages 58-62
- Abstract
Arexperiment was carried out for the analysis of time-varying regularity of early-age concrete strain under the influence of free air temperature changes. The strain data and the weight of specimens were collected. It is found that the severe shrinkage of early age (≤3d) concrete appears in the course of heating and cooling of daily temperature. And the magnitude of the severe shrinkage is 100×10 -6. The expansion strain difference is up to 100×10 -6 for different water cement ratio concrete, and the shrinkage strain difference is up to 200×10 -6.