14
/ ALBISTONE
®
G1 BENEFIT/G1 PLUS Skimmer Pools
Water level
higher than
concrete
Individual layers
of dry concrete
Permanent
formwork
8.
1. Lining the supporting walls and concreting around the pool shell
Before commencing the lining and concreting works, all elements of the technology (e.g. circulation nozzles,
pipes, fittings, etc.) must be fitted with suitable insulation – for example, MIRELON sleeves with a thickness of
10 mm. This will insulate these components thermally, enable their thermal expansion, and protect them from
damage during concreting.Once the preparation of the pool shell,
technology shaft and counterflow shaft, if any, is complete,
gradual lining of the supporting walls – which separate the
layers of concrete and soil – can begin. The support-
ing walls (150 mm in width) can be built after the
pool has been placed in position and its tech-
nologies have been connected. The foun-
dation slab must be suitably joined
with the underpinning wall. When
lining, it is important to main-
tain a sufficient distance
(50 mm) between the
retaining wall and the
reinforcing elements
of the pool shell and
the technology shaft
so that it is possible to
backfill this space with
dry concrete. Dry con-
crete must not be packed.
This will prevents the pool shell
from becoming uneven.
During concreting, it is necessary to con-
tinuously check the verticality (perpendicularity)
and flatness of the walls and the identical length of the diagonals of the pool shell. In case of any deviation,
immediately stop the concreting operation and level the shell. Concreting is carried out in layers, keeping the
height of a single layer of concrete to a maximum of 300 mm. After each single layer of concrete is completed,
the next layer is applied only after the previous layer has set. During concreting, it is necessary to gradually add
water to the pool so that the water level is 100 to 200 mm higher than the layer of concrete. The part of the wa-
ter level higher than the concrete de-
pends on the plasticity of the concrete
used. Choose a lower height of the
water level above the concrete for dry
concrete varieties and a higher level
for wet concrete. Do not connect the
pool shell to the lining firmly from the
bottom up to the height of the shell
reinforcing elements where these are
located – see chapter below. Lay the
piping during construction comple-
tion operations in perfectly packed
sand that contains no stones or clay,
and cover it with fine-grained sand
that contains no clay (cover sand bed
of at least 100 mm). It is necessary to proceed in such a way that no damage to the piping occurs e.g. by move-
ments (settling) of insufficiently packed subsoil and its surroundings, movements of frozen soil, etc. Vehicles
must not be allowed to drive over places where the piping runs. The remaining surrounding space between the
lining and the ground should be refilled with soil. Pack (compact) this soil carefully.
Do not concrete the place
where the counterflow is installed, but only refill it with packed sand.
Steel rebar
Ø 8 mm
Dry concrete
Concreting around the pool
