TY  - JOUR
T1  - Characteristics of Nano-Silica Concrete with Macro-Fiber Reinforcement
AU - Tawfik, Maged AU - Elsaid, Amr 
JO  - Journal of Engineering and Applied Sciences
VL  - 16
IS  - 1
SP  - 1
EP  - 5
PY  - 2021
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2021.1.5
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2021.1.5
KW  - compressive strength
KW  -flexural strength
KW  -macro fibers
KW  -Concrete
KW  -nano silica
AB  - In this study, an experimental investigation on
the use of nano silica using the macro-fiber reinforcement
on the compressive and tensile strength. The percent of
nano silica is 3% from the cement content and the weight
of macro-fiber reinforcement were zero, 3 and 5 kg m<sup>&#150;3</sup>.
All tests were performed at 28 and 56 days. Nano-silica is
used as partial replacement of cement. Further
investigation was carried out by addition of macro-fiber
reinforcement for the same percentage of nano silica (3%)
of cement in the same mix. Compressive and split tensile
strength of these mixes were measured and compared
with the control concrete specimens. The experimental
test results showed that concrete prepared with (3%) nano
silica showed a good comparable strength (either
compressive or splitting tensile) than the other two
concrete mixes of 10% of silica fume or combined nano
silica concrete. The test results showed also that there is
a decrease in ratio of tensile to compressive strength as
cement content increased for both 10% silica fume
concrete and 1% nano silica concrete due to the more
increase in compressive strength gain.
ER  -