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Technical Information - Block Paving
Block pavers are manufactured in accordance
with BS6717 Part 1: 1993. The "Code of
Practice for Laying Block Pavers" is to
be found in BS6717 Part 3: 1993.
To prevent sideways movement of the paving
blocks, edge restraints should be installed
which are adequate to support traffic loads
and to prevent loss of laying course material
from beneath the surface course.
There are several suggested laying patterns
outlined in the "Code of Practice"
mentioned above, but where the paved area is
to be subjected to vehicular traffic, only herringbone
bond should be used to minimise sideways movement
and to ensure better distribution of wheel loads.
Complete joint filling and final compaction
as soon as practicable after laying. Apart from
the laying face, do not leave any area of paving
uncompacted at the completion of the day's work.
For effective drainage of block paved areas,
minimum longditudinal falls of 1.25% and minimum
crossfalls of 2.5% are recommended.
Block paving should not be layed in inclement
weather as the performance of the paved area
may be jeopardised.
To reduce the effects of colour variation where
more than one load of block pavers are required
for a single paved area, it is desirable to
call off the whole order and to take products
from two or more packs and mix during laying.
Cutting of single coloured block paving using
a block splitter should be made at right angles
to the face of the product. It is also recommended
that the pavers are kept dry prior to use.
Surface efflorescence is not deleterious to
the performance of the concerte products in
use. It will wear away naturally with normal
weather and trafficking.
Structural design Of Pavements
Using Concrete Block Paving
Concrete block paving can be
usedfor a diversity of applications ranging
from footpaths to heavy industrial pavemants.
The pavers form part of an overall, flexible
pavement construction. This is intended to dissipate
the high streses applied to the surface (by
loading and /or trafficking) so that much lower
stress levels apply to the original ground or
subgrade. Each design method provides thickness
for various layers of material so that the subgrade
can maintain its support and undue deformation
of any part of the pavement is prevented. In
addition the subgrade needs to be protected
against local weather extremes, notably frost.
The pavement constuction will normally consist
of the layers shown below. although not all
layers need to be present.
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