 
RAMoven
Direct and rapid method of measuring the water content of fresh concrete samples
Introduction
More emphasis is being placed on
specifying and controlling the water
content of a concrete mix, because of
its influence on strength and durability.
The RAMoven provides a direct, rapid
and accurate method of measuring the
water content of fresh concrete
samples.
Description
The RAMoven is a powerful commercial
microwave oven operating on 220 / 240
volts. The water content of the concrete
is found by drying a sample of
approximately 2.5 kg until no further
loss of weight is observed ( typical
drying time 15 minutes ).
The method has been shown to be very
accurate over a wide range of concrete
types and conditions.
Conventional drying ovens or domestic
microwave ovens of lower power are
not suitable since some water becomes
chemically bound in the cement
hydration process during their much
longer drying times.
The RAMoven is supplied with oven
trays, glass-cloth wrappers
(to prevent sample spitting ), oven
gloves and a full instruction manual.
An electronic balance of 5 kg capacity
with a sensitivity of 0.1 g can be
supplied if required.
Specification
The 220 / 240 volt microwave oven has
a micro-processor-controlled timing
system, and a power rating of 1700
watts.
External dimensions and weight
Height: 518 mm
VVidth: 592 mm
Depth: 662 mm
Weight: Approximately 56; kg
User kit
The user kit supplied comprises:
4 heat-resistant glass trays
suitable for 2.5 kg samples
50 glass-fibre cloths (partly
reusable) for sample
wrapping
Oven gloves
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