Data - Masonry Blocks
Blocks are Approved by Dubai Municipality
& confirm with the requirements of BS
blocks confirm with the requirements
of BS 6073 and Local order No 44:1990
of Dubai Municipality Specifications
blocks have an average maximum drying
shrinkage complying with BS 6073 Typically
is obtained locally and regular inspections
are made at the quarry.
-All deliveries to the sites are examined
for grading and cleanliness, and selected
to meet standard requirements and occasionally
are supported by test reports .
-All cement used is manufactured locally
and supplied in bulk pressure carriers.
-Test certificates are obtained regularly
and confirm compliance with BS 12 or
BSS 4027, depending on type.
contents are contained within the limits
normally recommended as good practice
for producing structural concrete. These
are taken to be So3 - 4.0% and Nacl
- 0.5% of the cement content.
PROCESS - MANUFACTURING OF NORMAL MASONRY
Storing raw materials
The main raw materials used to produce CMUs
are cement, sand, and aggregate. These are
normally delivered to the concrete products
plant by truck . Cement is pneumatically
transferred to the storage silos equipped
with dust collectors. When the sand and
aggregates arrive they are normally stockpiled
in the yard, then transferred as needed
to storage bins. The method of transferring
materials from stockpiles to bins is with
a front-end loader.
Aggregates used to produce normal weight
concrete products include sand gravel, and
crushed stone. The sand and gravel may be
natural or produced by crushing at the aggregate
Batching and mixing
The raw materials in the storage bins and
silos are transported to a weighing or batching
system, as needed. Raw materials for each
batch are weighed to ensure batch consistency.
The mixer is an oversized cylinder turned
on its side, with mixing blades attached
to a horizontal shaft extending into and
through the drum. The inside of the mixer
drum is lined with replaceable, hardened
Raw materials are fed into the mixer at
the top. Materials are dry mixed in the
mixer for several minutes. Water is then
added to the dry mix using an electronic
water meter to assure consistency. Since
CMUs are generally molded using zero slump
concrete, only a relatively small amount
of water is added to each batch.
After some mixing, the consistency is automatically
checked and if needed, additional water
is added. The batch is then mixed for five
to eight minutes. Once mixed, the concrete
is dumped from the bottom of the mixer.
After a concrete batch is mixed, it is transferred
to the concrete products machine, where
it is fed into a mould. Moulds consist of
a mould frame and replaceable liners, cores
and "shoes" that form the top
surface of the masonry unit.
Once placed in the mould, the concrete is
compacted and consolidated by a combination
of pressure and controlled vibration. In
our concrete products machines, the entire
mould, the internal parts and the steel
pallet forming the bottom of the products
can be vibrated to maximize compaction,
uniformity and strength. The mould is filled,
compacted and stripped 6 to 11 times per
Once a curing rack is filled with steel
pallets ,the entire rack is transported
to the curing environment. By using a fork
lift truck to transport the products
A curing environment, ,referred to as curing
chamber,operates at atmos -pheric pressure.
Generally, the concrete products are held
in the yard for 12 to 24 hours Concrete
products are normally cured at a maximum
temperature of 120° to 180° F (55°
to 75° C). The entire curing process
normally takes 24 hours, but could be shortened
by adjusting the mix design and curing temperatures.
Products generally achieve 90% of their
ultimate strength when 2 to 4 days old.
Palletizing and storing
Cured concrete products are removed from
the yards and moved to a process-ing area
The units are then palletized and placed
is one of the leading manufacturing companies
in the field of producing Cement Blocks
and insulated/light Weight Blocks.
is also one of the leading manufacturing
companies in the field of producing concrete,plaster
,or resin elements comprise a vast range
for the realization vases, fountains, statues,
columns, capitals, septic tanks, taps and
other related products.
is situated in 15000m2 of land, which help
to keep more stocks at any point of time,
this makes ABMCO
capable of executing the block order immediately.