الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 16 |  |  |
| | | from | 16 | | |
Abstract
The objective of this study is to evaluate the effect of various filler types on the fresh
and hardened properties of self-compacting concrete (SCC) and flow-able concrete. For this
purpose, two groups of filler were selected. The first group was pozzolanic fillers (silica fume
(SF) and metakaolin (MK)) while the second one was non-pozzolanic fillers (limestone
powder (LP), Granite dust (GD) and marble dust (MD)). Cement contents of 400 kg/m3 and
500 kg/m3 were considered in this study. For SCC, for cement content of 400 kg/m3, the
additional percent of used filler materials was 7.5 %, 10 % and 15 % while for cement content
500 kg/m3, only 10 % was considered. For flow-able concrete, 10 % filler and 400 kg/m3
cement content were considered. Slump and slump flow, T50, sieve stability and bleeding
tests were performed on fresh concrete. The studied hardened properties included cube
compressive strength, unit weight, voids ratio, porosity, and water absorption. In addition,
thermo-gravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electronic
microscope (SEM) were performed on the hardened cement paste. The test results showed
that filler type and content have significant effect on fresh concrete properties where nonpozzolanic
fillers improve segregation and bleeding resistance. Generally, filler type and
content have significant effect on unit weight, water absorption and voids ratio. In addition,
non-pozzolanic fillers (limestone powder Granite dust and marble dust) have insignificant
negative effect on concrete compressive strength. Finally, there were a good correlation
between fresh concrete properties and hardened concrete properties for SCC and Flow-able
concrete.