ISO 15642:2003
(Main)Road construction and maintenance equipment — Asphalt mixing plants — Terminology and commercial specifications
Road construction and maintenance equipment — Asphalt mixing plants — Terminology and commercial specifications
ISO 15642:2003 establishes the terminology, gives requirements for specifications, and lists characteristics useful for determining theoretical performances and drafting technical documents for asphalt mixing plants used in the construction and maintenance of motorway, road and airport pavements, and road system and networks. It does not specify safety conditions, which are covered by specific standards. Equipment relating to quality control of manufactured products is defined by the standards specific to these products. ISO 15642:2003 is applicable to fixed plants during production time, whether they are transferable or not, which excludes mobile equipment for soil stabilization or retreading. It is applicable to mixing and/or coating plants for materials treated with hydrocarbon binders for continuous production and for batch production.
Équipement pour la construction et l'entretien des routes — Installations de traitement de l'asphalte — Terminologie et spécifications commerciales
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INTERNATIONAL ISO
STANDARD 15642
First edition
2003-05-15
Road construction and maintenance
equipment — Asphalt mixing plants —
Terminology and commercial
specifications
Équipement pour la construction et l'entretien des routes — Installations
de traitement de l'asphalte — Terminologie et spécifications
commerciales
Reference number
©
ISO 2003
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ii © ISO 2003 — All rights reserved
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 Descriptions of coating and/or mixing plants.4
4.1 Functions of the plant. 4
4.2 Components of asphalt mixing plants. 5
4.3 Additional equipment . 6
4.4 Mastic asphalt production plants. 6
4.5 Control of plant operation. 6
4.6 Automatic function controls . 7
4.7 Control station. 7
5 Output of an asphalt mixing plant. 8
6 Commercial specifications. 9
6.1 Technical characteristics of the components of asphalt mixing plant . 9
6.2 Global characteristics for plants to be specified by the manufacturer. 15
Annex A (informative) Examples of plants and sub-assemblies. 17
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 15642 was prepared by Technical Committee ISO/TC 195, Building construction machinery and
equipment.
iv © ISO 2003 — All rights reserved
Introduction
This International Standard deals with asphalt mixing plants used in road construction and maintenance
processes.
It provides definitions of equipment, processed materials, parameters and activities involved in asphalt
manufacturing and technical characteristics of machinery as well. The performance of asphalt mixing plants
and their components is shown.
INTERNATIONAL STANDARD ISO 15642:2003(E)
Road construction and maintenance equipment — Asphalt
mixing plants — Terminology and commercial specifications
1 Scope
This International Standard establishes the terminology, gives requirements for specifications, and lists
characteristics useful for determining theoretical performances and drafting technical documents for asphalt
mixing plants used in the construction and maintenance of
motorway, road and airport pavements, and
road system and networks.
It does not specify safety conditions, which are covered by specific standards. Equipment relating to quality
control of manufactured products is defined by the standards specific to these products.
This International Standard is applicable to fixed plants during production time, whether they are transferable
or not, which excludes mobile equipment for soil stabilization or retreading.
This International Standard is applicable to mixing and/or coating plants for materials treated with hydrocarbon
binders
for continuous production (see Figure A.1), and
for batch production (see Figure A.2).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 536, Road construction machines — Asphalt mixing plants — Safety requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
asphalt mix
〈mixed material〉 homogeneous paving product consisting of sized mineral aggregates, possibly including
additives and filler, collectively and uniformly coated with binder
3.2
asphalt mixing plant
set of equipment for asphalt mix production
3.3
batch
unit volume of material consisting of aggregates, binder, fines, possibly additives, contained and processed
simultaneously in a batch-type mixer
3.4
batch plant
asphalt mixing plant in which the operations to prepare the material and mixing are undertaken by successive
batches in a mixer which interrupts the material flow
See Figure A.5.
3.5
continuous plant
asphalt mixing plant in which the operations to prepare the material and the mixing are undertaken by
continuous equipment and handling systems and in a mixer which does not interrupt the material flow
See Figure A.3.
3.6
output of a plant
quantity of material produced based on 1 h of stabilized operation, expressed in metric tons
NOTE The conventional output is expressed by referring to parameters recommended in Clause 5.
3.7
batch cycle
minimum duration, expressed in seconds, between corresponding operations of successive batches
3.8
reclaimed fines
small particles of aggregate, transported by the gases in the drums where the aggregates are dried and which
are captured by the dust collectors
See Figure A.14.
3.9
imported filler
small particles of material other than sand or reclaimed fines and used as an ingredient of asphalt mix
3.10
residual water
water contained in the aggregate after drying
NOTE The residual water content is expressed as a percentage of the dry aggregate mass.
3.11
container
any type of bin, hopper box or tank capable of holding of constituent materials
3.12
continuous-volume dosing unit
device for proportioning the constituents in which the flow is determined by the opening height of a gate and/or
the belt speed
NOTE A special device may be used to permanently check the presence of ingredients on the belt.
2 © ISO 2003 — All rights reserved
3.13
continuous-mass dosing unit
device for proportioning the constituents in which the mass flow is obtained by the belt speed multiplied by the
mass of constituent materials spread over 1 m of the belt or measuring system of the screw feeder
See Figure A.7 c).
3.14
batch-mass dosing unit
device for proportioning in cycles the constituent materials in which the quantity delivered is determined by a
weighing apparatus
See Figure A.7 a) and b).
3.15
last runnings
that quantity of ingredients delivered by the feeder but not yet measured by the weighing instrument
3.16
screening device
equipment used to classify and separate material particles by sizes passing through the grate openings
See Figure A.9.
3.17
circulation of gases
heated air flow providing transfer of heat to, and moisture from, material in a dryer
NOTE The respective directions of air flow and material flow in a dryer are said to be
parallel-flow if they progress in the same direction (see Figure A.11), and
counter-flow if they progress in opposite directions (see Figure A.12).
3.18
drum dryer
equipment used to dry and heat aggregates
See Figure A.8.
3.19
RAP drum dryer
equipment used to dry and heat reclaimed asphalt pavements (RAP)
3.20
drum dryer-mixer
combination drum dryer and mixer used to dry and heat aggregates, possibly including additives and fillers,
and subsequently mixing them with binder to produce asphalt mix
See Figures A.12 and A.13.
3.21
drum dryer-mixer with recycling capability
drum dryer-mixer having the ability to include RAP in the mixing process of asphalt mix production
3.22
mixer
pug mill
equipment used to homogenize and evenly coat constituent materials with additives or binder using a set of
tools to agitate and displace the material bed
See Figures A.4 and A.10.
3.23
1)
dry mixing time
duration from introduction of dry constituents until introduction of liquid constituents
3.24
wet mixing time
duration from introduction of liquid constituent until material begins to leave the mixing region
3.25
1)
total mixing time
sum total of dry mixing time and wet mixing time
3.26
dwell time
duration material remains in a mixer
3.27
anti-segregation hopper
container receiving the material when there is a change of movement in the material in order to reduce the
dynamic effect which might cause segregation
NOTE The hoppers are generally arranged at the output of the mixers, the dryer-mixer drums and the conveyors.
3.28
batching accuracy
relative deviation of the batched portion from the programmed value, expressed as a percent
NOTE Batching accuracy is expressed by the formula
mm−
a
× 100 %
m
where
m is the specified mass for batching;
m is the real value of a mass received in a batching process.
a
4 Descriptions of coating and/or mixing plants
4.1 Functions of the plant
The plant shall be capable of ensuring the following:
storage and charging of aggregates;
measuring out of aggregates;
drying and heating of aggregates at a preset temperature;
removal of dust from the gases emitted from the dryer;
processing of gases from drying and heating so as to recover the fines, and secondly, limit the
atmospheric pollution (see Figure A.14);
re-introduction of reclaimed fines (if available);
1) Refers to asphalt mixing plants for batch production.
4 © ISO 2003 — All rights reserved
storage and measuring out of hot binders;
measuring out of hot aggregates;
mixing of constituents to obtain a homogeneous and uniformly coated product;
handling and storage of mixed materials (see Figure A.15);
storage of fuels for heater used for heating the binder tanks and installations.
These functions may be ensured by plants operating continuously or using a batch system.
4.2 Components of asphalt mixing plants
Asphalt mixing plants may consist of the following components (see Figures A.1 to A.3):
cold feed bins;
dosing units for measuring out aggregates, situated underneath the bin outlets;
conveyor for moving aggregates to a dryer;
2)
vibrating screen ;
2)
aggregate dosing unit ;
dryer or dryer-mixer;
dust collector;
insta
...
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