Hot Rolled Asphalt and Asphalt Concrete (Macadam) - Ministry of ...

Intermediate Restraint Device that is used to provide restraint of
concrete block paving units at intervals in the
paved surface.
Joint Filling Material Material used to fill the joints between
concrete blocks. Often referred to as ‘joint
filling sand’.
Joint Width The distance between adjacent concrete
blocks or concrete blocks and restraint.
Laitance On a concrete pavement, a thin layer with
poor durability formed of fine aggregate,
cement and water brought to the surface,
usually by overworking.
Lane A longitudinal strip of a pavement layer
produced by one pass of a set of paving
equipment.
Lane Joint A construction joint between adjacent lanes.
Laying Course Material Layer of material on which concrete blocks are
bedded. Often referred to as the ‘bedding
sand’ or ‘laying course sand’.
Laying Face Working edge of the wearing surface when
concrete blocks are being laid out.
Laying Pattern An arrangement of concrete blocks to form
specific patterns for structural requirements.
Macadam An asphalt mixture (nominally an Asphalt
Concrete) consisting of graded aggregate
coated with bitumen.
a. Dense Bitumen Macadam (DBM): A
dense, relatively impermeable, Macadam
coated with a bitumen binder and with a
filler aggregate content of between 2 %
and 9 %.
b. Heavy Duty Macadam (HDM): A dense
bitumen Macadam with 40/60 grade
bitumen binder and a high filler aggregate
content of 7 % to 11 %.
c. Pervious Macadam: A layer of 0/32 mm
Porous Asphalt which acts as a topping to
protect whilst allowing free penetration of
the surface water to French drains.
Marshall Asphalt An Asphalt Concrete designed to achieve
specified stability, flow, voids and density
characteristics.
Particle Size Fraction That portion of aggregate which passes one
sieve but is retained on the adjacent smaller
sized sieve in the sequence of sieves used to
specify that grading.
vi July 2010