Structural Floor Panels Design Guide - Hebel Supercrete AAC ...

3.3.3 Grout Filling the Ring Anchor
With a crew trowelling flat and one operating the
hose, a pump can deliver the ring anchor grout
quickly
The ring anchor must be filled with 15MPa minimum
strength grout with sand and aggregate no greater than 6
mm, to ensure correct flow around the reinforcing steel.
The grout can be site mixed in a portable concrete mixer
and installed by hand from a bucket and bricklayers trowel,
or pumped into place from a ready mix agitator truck.
Teamwork, speedy application and a systematic
approach is required when using pumps.
3.3.4 Finishing the Surface
Drying shrinkage of the ring anchor grout will cause
different levels between panel surface and ring anchor
surfaces. This can be overcome in the following ways;
Method A
The simplest solution is to trowel the wet grout in and float
it flush with the adjacent panels. When it sets and shrinks
back, causing a dishing of the grout surface, this can be filled
with a secondary application of Supercoat High Build
Render and floated flush. This finishing work is best done
once construction activities over the floor are complete,
so that any chips, scrapes and gouges caused by scaffolds,
A bucket of site mixed mortar is more
manageable for a one man crew.
or accidental damage, can be patched at the same time.
This work is therefore often carried out by a coater or tile
applicator, rather than the panel installation crew.
Method B
If the grout surfaces must be finished by the panel install
crew, then the grout can be slightly over filled in the ring
anchor. Once partially set, with the bulk of the initial suction
and drying shrinkage occurred, the installer can use the
edge of a steel float to scrape off the surface, flush with the
adjacent panels and polish with the float surface. This will be
less effective than method A.
If thicker floor finishes, such as carpet with underlay, tiles
on a grout bed, etc are to be used, then this level of finish
should suffice.
Floating the grout flush with the floor surface.
Method C
Where finishes such as thin vinyl require fine tolerances
in surface, it is recommended that the grouting is installed
flush, as for Method A, but rather than just rendering the
stripes of grout, the whole floor is flooded with a few
millimetres of self levelling compound to provide an even
substrate.
SFP 2012 46 Copyright © Supercrete Limited 2008