Field study of the basalt rocks indicate in Jaubet-AL Dilbe that casts basalt in the
field consist of tuffit, pyroclastic Sometimes consist of porphyric coarsebasalt with lava
structure and brescia of tufa ,which contain a lot of surrounding rocks
as lime stone and
dolomite. The basalt mass noting the presence of dykes in search area incisor squad
pyroclastic. The basalt color is light gray to dark gray. It is form the following
petrographical kinds: olivine basalt, olivine augite basalt, olivine plagioclase basalt,
plagioclase basalt. As for the lapilli consist of basalt (olivine basalt olivine vascular basalt
and plagioclase basalt)
The purpose of this paper is to identify the specifications of volcanic tuff (scoria) widespread in the south of Syria, many laboratory tests have been done for determining the basic physical properties of scoria the addition of compaction, shear res
istance, particle size distribution, and California bearing ratio. Also, an analytic study has been done to state the possibility of using scoria in filling by itself or after being mixed with clay (forming the greatest part of soils in south Syria), examining the change occurring in clay. So we have determined clay specifications, adding scoria to clay using different percentages:
(5% - 10% - 15% - 20% - 25% -30%)
Then we study the specifications of each mixture, such as compaction properties, shear resistance, particle-size distribution, and California bearing ratio.
