Influence of Curing Age and Mix Composition on Compressive Strength of Volcanic Ash Blended Cement Laterized Concrete
Abstract: This study
investigates the influence of curing age and mix proportions on the compressive
strength of volcanic ash (VA) blended cement laterized concrete. A total of 288
cubes of 100mm dimensions were cast and cured in water for 3, 7, 28, 56, 90 and
120 days of hydration with cement replacement by VA and sand replacement by
laterite both ranging from 0 to 30% respectively while a control mix of 28-day
target strength of 25N/mm2 (using British Method) was adopted. The results show
that the compressive strength of the VA-blended cement laterized concrete
increased with the increase in curing age but decreased as the VA and laterite
(LAT) contents increased. The optimum replacement level was 20%LAT/20%VA. At this
level the compressive strength increased with curing age at a decreasing rate
beyond 28 days. The target compressive strength of 25N/mm2 was achieved for
this mixture at 90 days of curing. VA content and curing age was noted to have
significant effect (α ≤ 0.5) on the compressive strength of the VA-blended
cement laterized concrete.
Author: Olawuyi, B.J.,
Olusola, K.O., Babafemi, A.J
Journal Code: jptsipilgg120026
