Tenders are invited for Supply of fine aggregate
sieve shaker (motorized with digital timer) with brass sieves of 4.
reclaimer is geared for extracting coarse and fine aggregate
to be resold for fill material, or washed, separated, and stockpiled for recycling.
Two different sources of internal water supply are compared: 1) replacement of a portion sand by partially saturated lightweight fine aggregate
2) the addition of superabsorbent polymer particles (PEG).
In view of the fact that their properties are more or less the same as that of the sand, the marble sludge powder and the quarry dust are effectively employed as fine aggregate
in the cement concrete .
Moreover depleting sources of sand in Pakistan triggered the dire need of replacement of fine aggregate
of the concrete.
On the other hand, researchers (Ugurlu, Topcu 2003) stressed out that the addition of 7-10% of mineral filler to fine aggregate
(0-2 mm) improved the properties of concrete such as: compressive strength and flexural strength.
The method determines coarse aggregate as those particles that create voids and fine aggregate
as those particles that fit into the voids created by the coarse aggregates.
In this study performance of mortar incorporating 10%, 20% and 30% polymers as volume replacement of fine aggregate
The particle size distribution of the aggregates was according to AHSTO classification (Hogentogler and Terzaghi, 1929) with fine aggregate
belonging to zone 5 of the classification, whereas the maximum diameter of the coarse aggregate was 20 mm, the average specific gravity of the fine aggregate
This very fine aggregate
gives the best appearance when cured.
In this study, it is planned to replace some percentage of fine aggregate
with copper slag and some percentage of cement with GGBS to develop the high performance concrete.
The assets include 100 hard rock or fine aggregate
extraction sites producing annually 30 million tonnes.