WINNING
road layering, and are produced according
to SANS 1083:2018 Edition 2.6. Products
are manufactured to the highest technical
specifications to meet multi-purpose
application needs.”
Products are used in multiple
construction markets from small, medium
to large enterprises. Predominantly, the
materials produced are used by concrete
manufacturers, road and building
constructors with regards to base and sub-
base layers. It supplies various readymix
concrete producers, as well as construction
companies with products in and around the
Johannesburg area.
Beneficiation of aggregate is a major
component of what happens at Jukskei
Quarry. “AfriSam Readymix is being supplied
with concrete aggregates produced at this
operation. Aggregates is a much sought-after
product, and we supply not just AfriSam but
also commercially supply other readymix
concrete manufacturers in the market, as
well as to various general civil contractors for
concrete or road building purposes. It is for
the use of infrastructure development in and
around Gauteng,” says Celliers.
“We are not aligned with any specific
contractor, but supply to the general
market, based on material need and
proximity to the site. We are not limited
to a specific geographical footprint, and
supply materials anywhere depending on
commercial justification.”
Mining and crushing
Depending on fluctuating market demand,
Jukskei Quarry is capable of producing in
excess of one million tonnes a year, says
Celliers. All stone is mined by conventional
drilling and blasting methods, with
blasted material being loaded to haul
trucks by excavators from the muck pile
and transported to the primary crusher.
The material is then processed by means
of crushing and screening, to produce
aggregates. The products are then sold and
removed from site by utilising front end
loaders and haul trucks.
Minimal over burden stripping is
conducted through the local contracted
load-and-haul company. Drilling and
blasting is also conducted through a
competent contracted drilling and blasting
contractor, based on a rock-on-ground
commercial contract. The pit is almost at its
final wall on the northern boundary, and
for the next 20 years mining activities will
involve straightening out these final quarry
high walls, expanding the floor and also
expanding eastwards.
Celliers describes the aggregate Jukskei
produces, “Our products range from -8mm
crusher sand; to 9.5mm, 13mm and 22mm
concrete stone; and to G1 and G5 clear sub-
base aggregate, the latter is predominantly
used for road construction and sub-
structures.”
The Jukskei Aggregates operation consists
of two different crushing plants situated
around the site, A plant and B plant, each of
which produces a different sized product.
There are also two readymix concrete
batching plants situated on site so as to
reduce the cost of transport; as well as a
laboratory for testing all the aggregate/
ready-mix. “We do daily lab testing of
aggregate to pick up if anything is out
AfriSam works manager, Daneel Celliers.
the geographical area in which it is situated,
encroachment of high end residential and
commercial property will pose challenges
in the near future. As a result, AfriSam has
changed its mining methodology, while
ensuring compliance with environmental
and legislative requirements in the forever
changing surroundings.
“We also have an evacuation plan when
blasting, and close off the top road not
permitting vehicles to enter or leave for the
duration of blasting,” says Celliers.
The commodity mined at Jukskei Quarry
is granite with the local reef consisting
of granite and reddish de-composed
granite. “Our aggregate products are for
concrete, base and sub-base material for
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QUARRY SA | JANUARY/FEBRUARY 2019_19