Kesan penggunaan Jermang Relau Bagas (GGBS) terhadap kekuatan mampatan,
keliangan dan kebolehtelapan konkrit telah dikaji. GGBS digunakan dengan cara
penggantian terus terhadap simen melalui kaedah jisim ke jisim pada tahap penggantian
tertentu. Empat campuran konkrit pada tahap penggantian GGBS sebanyak 0%, 20%,
50% dan 70% disediakan. Nisbah air/pengikat yang malar untuk setiap campuran konkrit
digunakan bagi mengasingkan kesan tahap penggantian GGBS. Keputusan kajian secara
amnya menunjukkan kesan penggunaan GGBS mengurangkan kekuatan awal konkrit
dengan lebih tinggi tahap penggantian lebih tinggi pengurangan berlaku. Sebaliknya,
kekuatan jangka panjang konkrit meningkat dengan penambahan GGBS. Keputusan juga
menunjukkan bahawa penambahan GGBS meningkatkan keliangan dan kebolehtelapan
jangka pendek konkrit, tetapi mengurangkan keliangan dan kebolehtelapan jangka
panjang konkrit. Oleh itu, kesan penggunaan GGBS berpotensi untuk meningkatkan
kekuatan dan ketahanlasakan konkrit.
_______________________________________________________________________________________________________
The influences of Ground Granulated Blastfurnaced Slag (GGBS) on compressive
strength, porosity and permeability of concrete has been investigated. The GGBS was
used partly replace the cement by direct replacement method on mass – for – mass basis.
Four concrete mixes with GGBS replacement levels of 0%, 20%, 50% and 70% were
prepared. A constant water/binder ratio was use for all concrete mixes so as to isolate the
effect of GGBS replacement levels. The result generally show that the effect of GGBS is
to reduce the early age strength of concrete with higher reduction at higher replacement
levels. On the other hand, long term strength is enhanced with the addition of GGBS. The
result also show that the inclusion of GGBS increase the early age porosity and
permeability of concrete, but reduced the long term porosity and permeability. Hence, the
use of GGBS could potentially enhance the strength and durability of concrete.