APPARATUS FOR AN ON-SITE CONCRETE MIXER TRUCK WASH-OUT

APPAREIL POUR LAVAGE SUR PLACE DE BETONNIERE

English Abstract

This application relates to an apparatus designed to collect concrete from a
ready mix
truck discharge chute. Separate the coarse and fine aggregate fraction from
the cement
slurry and return the cement slurry back into the ready mix truck drum for
reuse or
discharge upon return to the point of production. The apparatus consists of a
portable
container combining an open-ended collection hopper including removable
screens and
an air operated pressure vessel, The apparatus is suspended off the end of the
truck
discharge chute and residual concrete a washed onto the hopper and over the
screens.
Coarse and fine aggregate is retained on the screens and the cement slurry
water passes
through in to the pressure vessel below. When the pressure vessel is filled to
capacity,
regulated air pressure supplied via the truck air system is applied to the
vessel that in turn
discharges the slurry through a discharge hose back into the ready mix drum.
The
apparatus has no moving parts, utilizing low-pressure regulated air for means
of transfer.
The apparatus allows for job-site collection and reuse of high PH cement
slurries thereby
preventing contamination of work sites and adjoining waterways.

Claims

WHAT IS CLAIMED IS:
1. A wash down and containment apparatus to be used in conjunction with the
drum
of a ready mix concrete truck and its discharge chutes, said apparatus
consisting
of:
[a] A portable container, capable of mounting on the end of the discharge
chute, said
container consisting of an open- ended hopper with removable screens attached
to a
regulated pressure discharge vessel.
2. The apparatus of claim l, utilizes pressurized air pressure supplied by the
ready
mix truck to discharge collected cement slurry waters.
3 . The apparatus of claim 2, is related to a maximum operating pressure of
15psi
and incorporates ar inline pressure release valve to ensure safe operation.
4. The apparatus of claim1, .has no moving wear parts arid discharges the
slurries
back to the drum of the ready mix truck via a 3/4' discharge hose,

Description

CA 02330511 2000-12-29
'.r:~r~ __.''J I~in~.j_~ i~_,~_:'_~ LTLa .,
t='.-;~:aE
ABSTRACT
This application relates to an apparatus designed to collect concrete from a r
eady mix
truck discharge chute. Separate the coarse and fine aggregate fraction from
the cement
slurry and return the cement slurry back i.nt~-~ the ready mix tn~ck drum for
reuse r~r
discharge upon return to the point of production. The appa..raf:us consists of
a portable
container combining an open-endEd collection hopper includin;~ r emttvable
screens and
an air operated pressure vessel, The apparatus is suspended offt'Ie end ofthe
truck
discharge chute and .residual concrete a washed onto the hopper and ~rver the
screens.
Coarse and fine aggregate is retained on the screens and the cement slurry
water passes
through in to the pressure vessel below. When th.e pressure vEasel is filled
tø capaoit~l,
rebulated air pressure supplied via the truck air system is applied to the
vessel that in turn
discharges the slurry tl-~rough a discharge hose back into the ready mix drum.
The
apparatus has no moving parts, utilizing to«°-pressure regulat~;d ai.r
for means of transfer-
The apparatus allows for job-site collection and rmae of high PH cement
slurries thereby
preverning contamination of work sites and adjoining waterw;iys.

Representative Drawing