Sedimentologic
evaluation of concrete gravels and sands, Dahshour, Egypt, for engineering applications. A
study in engineering sedimentology
Amal H. Rasmy, Waguih N. Mikhail and 1R.
ELRaheb
Egyptian Geological Survey, Cairo 1Ardman
Ace Co., Egypt |
The present study is an attempt to outline the
characteristics of the concrete aggregates (gravel and sand) in a quarry near Dahshour
South of Cairo on the west side of the Nile Valley. This is done to determine their
compliance with the standard specifications as a pre-requisite before their utilization in
construction works particularly major projects.
Petrographical investigation, X-ray diffraction and differential thermal analyses were
carried out on the studied aggregates. Physical studies included sieve analysis, Los
Angles abrasion test, determination of the adhering clay lumps and friable particles and
mortar bar test for the physical reactivity of the aggregates. Chemical tests including
the determination of the chemical composition, the potential alkali-reactivity and the
amount of sulfates and chlorides were also performed.
The results obtained indicated that the specifications of the studied samples conform well
with the ASTM standards for concrete aggregates. It is here recommended to carry out
similar studies on other sources of aggregates before their utilization to insure their
suitability as construction materials. This will enhance further researches in engineering
sedimentology.
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