
Gravel plant with its own gravel pits: washed gravels, sands, frost protection material and grain mixtures as well as earthworks and excavation disposal

Franz Asam + Sohn GmbH
Altomünster (Irchenbrunn district) · Brugger · LichtenbergNew on Amplifa
About us
Franz Asam + Sohn GmbH is a family-run gravel plant and earthworks company in Altomünster (Dachau district, Bavaria). Founded in 1960 as a concrete block works, the company today operates its own gravel pits in Brugger and Lichtenberg as well as a gravel plant in Irchenbrunn, where gravel and sand are washed, screened and blended. The product range includes washed gravels and sands for concrete and mortar, frost protection gravel, grain mixtures for road construction, mineral concrete, waterway armour stone and screened topsoil; all construction materials are subject to internal and external monitoring. In addition, the company offers earthworks of all kinds, excavation of building pits, site profiling, acceptance and disposal of Z0 excavated material in its own pits, as well as mobile screening technology with a drum screening plant on the construction site. An in-house dosing plant produces mixtures of up to 200 t/h precisely according to the specified grading curve. With around 12 employees and its own vehicle fleet, the company supplies construction, agriculture as well as private and commercial customers in the Altomünster, Dachau, Aichach and Fürstenfeldbruck region.
- Site
- Altomünster (Irchenbrunn district)
- Processes
- Earthworks (excavation of building pits, site profiling, grading, topsoil stripping), Excavated material removal & disposal / acceptance of Z0 material, Drum screening plant (mobile screening technology / material processing), Dosing plant (blending according to grading curve, up to 200 t/h), Material transport (delivery ex works, excavated material removal, all-wheel-drive tippers, low, Gravel plant: washing, screening and blending of raw materials, Earthworks, Excavation of building pits
- Materials
- Concrete gravel 0/16, Screed sand washed 0/8, Masonry sand washed 0/4, Natural sand washed 0/4, Cable sand washed, Crushed sand washed 0/3, Natural shingle washed 4/8, Void gravel washed 8/16, 16/32, 32/X
- Certificates
- Quality monitoring of construction materials (internal and external monitoring)
- Founded
- 1960
- Employees
- 12
- Industries
- Construction (civil/road/path engineering), Agriculture/Horticulture, Private & commercial customers
- 01
Extraction in own gravel pits (Brugger, Lichtenberg)
- 02
Transport to the gravel plant
- 03
Washing and screening at the Irchenbrunn gravel plant
- 04
Dosing and blending according to grading curve (up to 200 t/h)
- 05
Storage ex works
- 06
Delivery with own vehicle fleet or customer pickup
Materials & Processes
Concrete gravel 0/16 washed
Standard-compliant aggregate for concrete and mortar.
Screed sand 0/8 washed
Washed sand for screed work.
Masonry sand 0/4 washed
Fine fractions for mortar and masonry.
Frost protection gravel
Load-bearing, frost-resistant base for paths and roads.
Grain mixtures
Compactable mixtures for road construction and surface consolidation.
Mineral concrete
Unbound mixture for civil and road engineering.
Waterway armour stone Jura / granite
Protection of banks and slopes.
Topsoil screened
Screened topsoil for gardening and landscaping.
Acceptance of Z0 excavated material
Uncontaminated soils and rocks for backfilling in own pits.
Locations

Gravel plant Irchenbrunn
DEGravel plant (washing, screening, blending), administration, logistics
- Materials
- Gravel, sand, frost protection, grain mixtures
- Dosing plant up to 200 t/h
- Liebherr wheel loader Series 566
- Liebherr wheel loader Series 556
- Atlas wheel loader
Gravel pit Brugger
DEGravel pit / excavated material disposal (Z0 material)
- Materials
- Gravel, Z0 excavated material
Gravel pit Lichtenberg
DEGravel pit / excavated material disposal (Z0 material)
- Materials
- Gravel, Z0 excavated material
Products & Services






Inside the production






Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Earthworks (excavation of building pits, site profiling, grading, topsoil stripping)Engineering | – | – | – | – | Excavated material, Topsoil |
| Excavated material removal & disposal / acceptance of Z0 materialEngineering | – | – | – | – | Uncontaminated soils and rocks (washed) |
| Drum screening plant (mobile screening technology / material processing)Surface | – | – | – | – | Topsoil, Sand, Gravel material, Humus |
| Dosing plant (blending according to grading curve, up to 200 t/h)Engineering | – | – | – | 200 t/h | Gravel, Sand, Crushed stone, Frost protection, Mineral concrete |
| Material transport (delivery ex works, excavated material removal, all-wheel-drive tippers, lowEngineering | – | – | – | – | Gravel, Sand, Crushed stone, Excavated material |
| Gravel plant: washing, screening and blending of raw materialsCasting | – | – | – | – | Gravel, Sand, Frost protection, Grain mixtures |
15 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Wheel loader | Liebherr Series 566 | – | Bucket volume up to 4.7 m³ | – | Gravel plant Irchenbrunn |
| Wheel loader | Liebherr Series 556 | – | Bucket volume up to 4.7 m³ | – | Gravel plant Irchenbrunn |
| Wheel loader | Atlas | – | – | – | Gravel plant Irchenbrunn |
| 2-axle semi-trailer with hydrodrive and insulated body | – | – | – | – | – |
| 3- and 4-axle three-way tippers with tandem trailers | – | – | – | – | – |
| Mobile excavator | Atlas | – | – | – | – |
| Crawler excavator with 2D and 3D control | Atlas | – | – | – | – |
| Crawler excavator with 2D and 3D control | Liebherr | – | – | – | – |
| Mini excavator | Neuson | 1 | – | – | – |
| Bulldozer with rear ripper | CAT D6 LGP | – | – | – | – |
| Dump truck | Liebherr | 1 | Dump body volume up to 18 m³ | – | – |
| Roller compactor (soil compaction) | Bomag | 1 | – | – | – |
| Mobile screening plant | Komptec Maxx 518 | 1 | – | – | – |
| Dosing plant (200 t/h) | – | 1 | up to 200 t of blend per hour | – | Gravel plant Irchenbrunn |
| Drum screening plant (mobile) | – | – | – | – | – |
Additional services
Quality
All construction materials are quality-monitored and subject to internal and external monitoring; the in-house dosing plant produces blends precisely according to the specified grading curve.
| Evidence | Gravel plant Irchenbrunn |
|---|---|
| Quality monitoring of construction materials (internal and external monitoring) |
History
- 1960
Founded by Franz and Anna Asam as a concrete block works with approximately 10 employees.
- 1980
Taken over by son Franz Asam and his wife Gerlinde; establishment of an own haulage business.
- 1983
Opening of the own gravel plant and massive expansion of the machinery fleet.
- Heute
Operation with own gravel pits in Brugger and Lichtenberg as well as gravel plant in Irchenbrunn; approximately 12 employees.