| Pore Structure Studies of High Early Strength
Portland Cements Containing Silica Fume |
AMITABHA KuMAR* AND DELLA M. RoY
Pages : 11-15
DOI : 10.1080/0371750X.1988.10822874 |
| Abstract |
| The porosity and pore structure development in high early strength
API Class C or ASTM Type III portland cement pastes and mortan
during the fint 28 days of hydration have been investigated using
mercury intrusion porosimetry. The effects of curing at 27 and 60C
and of the replacement of five and 10 wt% of the portland cement by
silica fume, an amorphous fine grained silica, on the porosity and
pore structure of pastes and mortan have been studied.
Pastes and mortars cured at 60C showed finer pore sizes at all
curing ages investigated with an increased porosity for pores in the
range of 7500 to 1.9 nm after 7 days of hydration when compared to
samples cured at 27"C. The addition of silica fume decreased
the median pore size proportionately without significant alteration
in the total porosity when compared to the parent material. The reduction
in pore size has been considered to be the reason for higher
strengths obse"ed in sillca fume blended mortan. |
| Full text : Subscribe to Download Full Text |
| [Go Back] |
