Concrete Washout Treatment System to safely reduce the pH of concrete washwater.
features and Benefits
The Problem
Water in contact with green cement will have a raised pH. pH is
measured on a scale from 0 to 14 where 7 is neutral, 0 is highly
acidic and 14 highly alkaline. Concrete wash waters are both
hazardous and polluting. Typically they have a high pH (11-12),
high suspended solids and other trace materials, some originating
from cement, others from additives or from the mixing equipment.
Concrete delivery and production is carried out daily on thousands
of construction sites nationwide.Concrete mixers, wagons and
related equipmen need to be washed off regularly. Managing the
disposal of concrete wash waters legally and in an environmentally
responsible way has always been difficult for the construction
industry and now it has a raised profile and concern to regulators.
Environment Agency Guidance
The solution
pH Blue Cube and Plant Nappy Sack
Mudtech and,Plant Nappy have
worked together in order to provide this simple concrete washout
solution now available from Mudtech Tank Division.
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How To Use
The concrete wagon washes the chute only into the bag using a
10% pH Blue and
water pumped from the IBC container.
The alkaline cement water is neutralised as it is washed into
the Nappy Sack. Typically the pH will be reduced to between 8 and
9.
Solids settle in the bag.
The wash-water passes through the membrane where it is pumped
back into the IBC, making a closed loop
When the bag is full, after 50 to 70 plus chute washes at around
20 litres per wash, it can be replaced with a new bag and the old
one allowed to drain further on site. The water will not be
hazardous the cement cures it no longer poses a hazard so the bag
may then be emptied into a skip or the contents used on site.
Simple
Concrete Washout System
pH Blue available in 25 litres, 200 litres and
1000 litres.