الفهرس 
Ullttrra--Hiigh Perrfforrmance Concrrette ((UHPC))Only 14 pages are availabe for public view
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Abstract
UHPC is one of the breakthroughs in the 21st century in the field of concrete
technology. It achieved high results of mechanical properties, durability (resistance
fire, corrosion and chemical attacks) and bonding strength.
The aim of thesis is to evaluate the long-time behavior of UHPC. The
materials were used in the experimental program available in the Egyptian markets.
The main variables were fly ash, metakaoline, crushed quartz powder and
aggregate size. Fly ash and metakaoline, used as a replacement of cement weight.
Fly ash with ratio 10%, 20%, 30 and 40% as a replacement of cement was used.
Metakaoline with ratio 5%, 10% and 15% as a replacement of cement was used.
Crushed quartz powder with ratio 10%, 20% and 30% as a replacement of sand was
used and different aggregate size (3.2, 2.36, 1.9) were used. The effect of these
variables were analyzed and discussed their effective on the mechanical properties
and drying shrinkage. The results showed that, using 0.2 W/C, 0.02 superplastizers,
20% ratio of crushed quartz powder to fine sand (CQ/S), 20% ratio of fly ash to
cement (FA/C), 5% ratio of metakaoline to cement (MK/C), (1.9 mm) aggregate
size and fixed cement content 900 kg/m3 give the best proportions of UHPC.