4th WCSET-2015 at Japan
Civil Engineering:
Title:
Strength behavior of cement mortar assimilating rice
husk ash
Authors:
Muhammad Harunur Rashid, Tarif Uddin Ahamed, Sobura
Khatun
Abstract: This
investigational study was prepared to measure the effect
of Rice Husk Ash on the long term strength of cement
mortar. Mortar samples were made with a variety of
replacement levels of the cement by mass: 10, 15, 20 and
30% for rice husk ash. Samples were stored in a
saturated-humidity moist room up to 28 days confirming
ASTM standards. After this the samples were removed from
the cured chamber and stored in a space without
controlling the ambient environment up to 350 days.
Ordinary Portland cement (OPC) mortar was also prepared
as controlled samples and cured according to the other
samples. Setting time is changed due to the RHA addition
in mortar. The initial setting time is prolonged;
however the final setting time is reverse in nature due
to the addition of RHA in mortar for all replacement
level. Compressive strength is found out at 7, 28, 90
and 350 days age. Test results showed that strength
increases with the rice husk ash of 15 and 20% OPC
replacement level and on ward 90 days ages. In this
study it is concluded that the optimum replacement level
of ordinary Portland cement by rice husk ash might be 15
or 20% by considering other parameters.
Keywords: Compressive
Strength, Rice Husk Ash, Grinding Time, Setting Time,
Mortar
Pages:
174-179