Title:
Autog enous Deformation and Change of the Relative
Humidity in Silica Fume-Modified Cement Paste
Author(s):
0. Mejlhede Jensen and P. Freiesleben Hansen
Publication:
Materials Journal
Volume:
93
Issue:
6
Appears on pages(s):
539-543
Keywords:
cracking (fracturing); deformation; humidity; self desiccation;
shrinkage; silica fume.
DOI:
10.14359/9859
Date:
11/1/1996
Abstract:
Even during sealed curing and at a constant temperature, a hardening cement paste will deform and the relative humidity within its pores will lower This autogenous deformation and autogenous relative humidity change may be so significant that the cement paste cracks tf the deformation is restrained. This article focuses on the influence of silica fume addition on autogenous deformation and autogenous relative humidity change. Continuous measurement of autogenous deformation and autogenous relative humidity change for more than 1 and 1 1/2 years, respectively, was performed. The investigations show that silica fume addition markedly increases autogenous shrinkage as well as the autogenous relative humidity change.