Construction Works
- Construction of roads
- Construction of bridges, tunnels and other artificial structures
- Landscaping
- Installation and renovation works
- Earthworks
- Asphalt Works
Production & Sales
- Asphalt concrete
- Crushed stone: size (5 -10, 10 -15, 5 - 25, 20 - 40, 40 - 70)
- Fine gravel sand
- Basalt sand (grinded basalt)
- Coarse gravel sand: size (0 - 40, 0 - 15)
- Gravel
- Concrete
ՏԵԽՆՈԼՈԳԻԱ Asphalt concrete mix production process and its control
Asphalt concrete mix production process and its control. State Standard 9128-97
- Prior to preparation of a/c mix it is necessary to develop its composition in the laboratory (the ratio of sand, mineral dust and bitumen).
- To secure the precise composition of A/C mix the preliminary sorting of these materials is needed (the sorting equipment is installed before the cold vertical elevator).
- The amount of outputted materials from the plant storage bins to the mixer should correspond to the composition of the mix suggested by the laboratory.
- For the cover rehabilitation of all types of roads the following a/c mix is suggested:
1st grade
A type
where the amount of gravel should be 50-60% (state standard 9128-97).
Asphalt Concrete Mix Placement
1. Work organization plan
Asphalt concrete paving is applied in one or two layers. The technological steps are as follows:
1. Preparation works
2. Placement of asphalt concrete mix by paving machine
3. Compaction of applied layer with rollers.
2. Order of works for preparing the base
- Asphalt concrete mix is layered on dry, clean and not frozen base, when the air temperature is not less than 5 degrees by C in spring and 10 degrees by C – in autumn.
- To ensure high-quality adhesion of the cover and the base, before application of asphalt concrete cover the base should be cleaned of dust and dirt with the help of mechanical broom, air blowing by a portable compressor or by other means.
The wet base can be dried with the help of heated up to 250-300 degrees of C sand or finer gravel, as well as with the help of special heating devices.
- To ensure best adhesion with the base, as well as between asphalt concrete layers, before asphalt concrete application the preliminary processing of the surface with the help of viscous or liquid bitumen, as well as with bitumen emulsion is needed.
Asphalt concrete mix production process and its control
Asphalt concrete mix production process and its control. State Standard 9128-97
- Prior to preparation of a/c mix it is necessary to develop its composition in the laboratory (the ratio of sand, mineral dust and bitumen).
- To secure the precise composition of A/C mix the preliminary sorting of these materials is needed (the sorting equipment is installed before the cold vertical elevator).
- The amount of outputted materials from the plant storage bins to the mixer should correspond to the composition of the mix suggested by the laboratory.
- For the cover rehabilitation of all types of roads the following a/c mix is suggested:
1st grade
A type
where the amount of gravel should be 50-60% (state standard 9128-97).
Asphalt Concrete Mix Placement
1. Work organization plan
Asphalt concrete paving is applied in one or two layers. The technological steps are as follows:
1. Preparation works
2. Placement of asphalt concrete mix by paving machine
3. Compaction of applied layer with rollers.
2. Order of works for preparing the base
- Asphalt concrete mix is layered on dry, clean and not frozen base, when the air temperature is not less than 5 degrees by C in spring and 10 degrees by C – in autumn.
- To ensure high-quality adhesion of the cover and the base, before application of asphalt concrete cover the base should be cleaned of dust and dirt with the help of mechanical broom, air blowing by a portable compressor or by other means.
The wet base can be dried with the help of heated up to 250-300 degrees of C sand or finer gravel, as well as with the help of special heating devices.
- To ensure best adhesion with the base, as well as between asphalt concrete layers, before asphalt concrete application the preliminary processing of the surface with the help of viscous or liquid bitumen, as well as with bitumen emulsion is needed.
