concrete water rill
concrete water rill
(OP)
a client has requested a water rill constructed from concrete, not very large around 500mm wide 200mm deep, construction wise i was thinking few inches of compact stone then dpm and 100mm slab of concrete with steel mesh in
bottom and along side walls, allow that to set then make ply former for side walls and pour 100mm wide walls, the rill is quite long around 8-10m would expansion joints be needed? any comments much appreciated
bottom and along side walls, allow that to set then make ply former for side walls and pour 100mm wide walls, the rill is quite long around 8-10m would expansion joints be needed? any comments much appreciated





RE: concrete water rill
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: concrete water rill
RE: concrete water rill
With the cross-section you described, I would anticipate shrinkage cracks at 2 to 3m. With reinforcing, the cracks should remain tightly closed, but you might consider a coating anyway.
If the rill has intermittent dry periods, cracking will be worse, as wetting/drying causes cracking in concrete.
As cntw1953 noted, it is not desirable to have joints in a water conveyance.
RE: concrete water rill
There are some simple directions to build a rill on eHow:
http://www
RE: concrete water rill
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A major concern in the construction of the one hundred and sixty foot long water rill was the problem of
frost-heave. The rill is made up of ten-foot sections that can rack or twist but not leak, linked by expanding
leak-proof joint material.
RE: concrete water rill
bimr when you say it needs to be lined can this be done under concrete as concrete is the finish they want what liner would you recommend, thanks for all comments
RE: concrete water rill
RE: concrete water rill
RE: concrete water rill
PVC Liners
PVC liners are also called plastic liners. They are the most flexible and widely used because they are easy to install and maintain. These liners are also considered safe for aquatic plants and animals.
Butyl Liners
Butyl offer a good competition to the PVC liners in terms of usage. These liners are extremely durable since they have a life span of at least 20 years. These liners are also resistant to damage caused by extreme heat from the sun or UV rays. They are also ozone resistant. The butyl liners are easy to install and maintain too.
Butyl liners are at least 45mm thick as compared to PVC liners which are just 30mm thick. Butyl liners, unlike PVC liners are available in pre-cut, custom-cut and rolls option.
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