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Alarms for bitumen tanks
Midland Quarry Products > 01530 230530
manual handling & storage: 61
Midland Quarry Products has improved upon the already high standards of its bitumen tank alarms. The
tanks were fitted with integral level indicators with audible and/or visual high and low level alarms.
However, as the Refined Bitumen Association recommends, high-level alarms independent of level
indicators are also in place for a fail-safe system. This eliminates any overfilling.
To further enhance the system, and ensure that all members of staff can be made aware of an incident, a
separate alarm has been installed within the PC control systems.
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Admixture addition on concrete plant
Huntsmans Quarries > Naunton Quarry, Gloucestershire > 01451 850555
This Gloucestershire quarry has a ready-mix plant with a pan mixer and
a dry leg. When conducting specialised mixes with unusual additives,
the heavy drums in use have to be carried upstairs for addition by hand.
To improve safety, the company created a lockable gate that only
opens inwards on the mezzanine level, so that drums could be lifted up
by telehoist. This eliminated the need for a separate storage area on
the ground to protect from frost.
In the event of a leak, the leakage would be onto the mixing bay of the
concrete plant which is totally contained, removing the potential for
pollution.
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Reducing the risks from manually-fed
additives
Lafarge Aggregates > Aldermaston Readymix Plant, Berkshire > 07803 953990
The value-added materials produced at the Aldermaston Readymix Plant require the plant supervisor to
add materials during the mixing process by hand, often at height in a dusty environment. The pan mixer
has to be opened to add the fibres, which used to require the plant to be locked off for each load.
To improve safety, the company added a slot to the aggregate intake chute of the pan mixer. This now
allows bags of fibres to be hand added from a designated safe working platform without the supervisor
needing to access the pan mixer or to halt the mixing process.
The design of the slot incorporates a mechanism to prevent dust being blown back into the working area
through the addition of a simple sliding draw. In addition, hand added materials can now also be delivered
directly to the correct height by a fork lift truck.
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Transfer of steel fibres into concrete plant
Tarmac > Gawsworth, near Macclesfield > 01260 223477
The introduction of steel fibres into concrete at the mixing stage can be a strenuous and repetitive task.
Tarmac Area 3 Concrete, at Gawsworth, near Macclesfield, has produced a safe system of work that
includes the use of a forklift truck to move pallets to a 110 volt conveyor.
Manual handling of the bags was the subject of discussion with site personnel, with the outcome being an
agreed frequency of work rotation.