Extraction, processing and refinement of quartz sand and gravel at plants in Rodgau and Babenhausen
Kaspar Weiss GmbH & Co. KG Sand- und Kieswerke
Aschaffenburg-Goldbach · Rodgau Nieder-Roden · BabenhausenNew on Amplifa
About Kaspar Weiss Sand and Gravel Works
Kaspar Weiss GmbH & Co. KG Sand- und Kieswerke is an independent family business founded in 1939, headquartered in Aschaffenburg-Goldbach with gravel plants in Rodgau Nieder-Roden and Babenhausen. The company focuses on the extraction, processing and refinement of quartz sand and gravel from deposits in the Hanau Basin. Extraction is carried out below the groundwater level using floating dredger systems; transport to land is via floating belt conveyor systems. In the processing plants, the raw gravel is washed several times, separated by screening and hydraulic classification into grain size classes from 0–0.5 mm to 8–16 mm, and stored in silos or on open stockpiles. Products are delivered loose or in big bags, ex works or with the company's own fleet; the main sales market is the concrete and building materials industry in the Rhine-Main region, as well as construction chemistry and water treatment. After extraction, the areas are reclaimed; in 2025 the company commissioned a floating photovoltaic system with up to 2.1 MW at the Rodgau gravel plant.
- Site
- Aschaffenburg
- Processes
- Extraction of quartz sand and gravel with floating dredger systems (extraction below the, Transport of the material via floating belt conveyor systems, Processing: multiple washing of the raw gravel, Screening into various grain size classes (fractions 0-0.5 mm, 0-1 mm, 0-2 mm, 0-4 mm, 2-4 mm, 4-8, Hydraulic classification, Refinement of quartz sand and gravel, Storage in silos and on open stockpiles, Weighing of sand and gravel
- Materials
- Quartz sand (Main quartz sand), Gravel (aggregate), Crushed stone, Raw gravel, Main quartz sand
- Certificates
- In-house production control (WPK) DIN EN 12620/13139/13043
- Founded
- 1939
- Industries
- Concrete and building materials industry, Road construction, Prefabricated component manufacturing, Construction chemistry, Water treatment
- 01
Extraction of quartz sand and gravel with floating dredger systems below the
- 02
Transport to land via floating belt conveyor systems
- 03
Intermediate storage of the raw gravel
- 04
Multiple washing in the processing plant
- 05
Screening and hydraulic classification into grain size classes
- 06
Weighing and storage in silos or on open stockpiles
- 07
Delivery ex works or with the company's own fleet
- 08
Reclamation of the extraction areas
Products and Processes
Main quartz sand
Pure quartz sand with high abrasion resistance from the Hanau Basin, e.g. for concrete, mortar, road construction and construction chemistry.
Gravel (aggregate)
Multiple-washed, screened and hydraulically classified aggregate in fractions from 2–4 mm to 8–16 mm.
Crushed stone
Coarse aggregate as a natural building material, among other things for road and civil engineering.
Raw gravel
Unprocessed gravel as the starting material for processing.
Locations
Aschaffenburg-Goldbach
DEHeadquarters and administration
Rodgau Nieder-Roden
DEGravel plant/production
- Materials
- Main quartz sand, aggregate (gravel)
- Floating dredger system
- Floating belt conveyor system
- Processing and screening plant (silo system and screening tower, renewed in 2017)
- Own vehicle fleet
Babenhausen
DEGravel plant/production
- Materials
- Main quartz sand, aggregate (gravel)
- Processing plant with two floating dredger systems
- Floating belt conveyor system
- Own vehicle fleet
Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Extraction of quartz sand and gravel with floating dredger systems (extraction below theCasting | – | – | – | – | Quartz sand, Gravel |
| Transport of the material via floating belt conveyor systemsEngineering | – | – | – | – | Quartz sand, Gravel |
| Processing: multiple washing of the raw gravelSurface | – | – | – | – | Raw gravel, Quartz sand, Gravel |
| Screening into various grain size classes (fractions 0-0.5 mm, 0-1 mm, 0-2 mm, 0-4 mm, 2-4 mm, 4-8Testing | – | – | – | – | Main quartz sand, Aggregate (gravel) |
| Hydraulic classificationSurface | – | – | – | – | Quartz sand, Gravel |
| Refinement of quartz sand and gravelSurface | – | – | – | – | Quartz sand, Gravel |
| Storage in silos and on open stockpilesAssembly | – | – | – | – | Quartz sand, Gravel |
| Weighing of sand and gravelTesting | – | – | – | – | Quartz sand, Gravel |
| In-house production control (WPK) in accordance with DIN EN 12620, DIN EN 13139, DIN EN 13043Testing | – | – | – | – | Quartz sand, Gravel |
9 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Floating dredger system | – | – | – | – | Gravel plants Rodgau Nieder-Roden and Babenhausen |
| Floating belt conveyor system | – | – | – | – | Gravel plants Rodgau Nieder-Roden and Babenhausen |
| Gravel processing plant | – | 2 | – | – | Karlstein/Großwelzheim and Kahl/Main |
| Processing plant with two floating dredger systems | – | – | – | 1974 | Babenhausen |
| Processing and screening plant (silo system and screening tower) | – | – | – | 2017 | Rodgau Nieder-Roden |
| Suction excavator | – | – | – | – | Kahl/Main (historical) |
| Pneumatic excavator | – | – | – | – | Kahl/Main (historical) |
| Concrete pump | – | 1 | – | – | Rodgau Nieder-Roden gravel plant |
| Own vehicle fleet (trucks for deliveries) | – | – | – | – | Rodgau and Babenhausen |
Additional services
Quality
The products are subject to in-house production control (WPK) in accordance with DIN EN 12620, DIN EN 13139 and DIN EN 13043. Daily inspections of the processing stages and weekly sampling of the sand and gravel fractions ensure product quality; declarations of performance and grading curves are documented per site.
| Evidence | Babenhausen | Rodgau Nieder-Roden |
|---|---|---|
| In-house production control (WPK) DIN EN 12620/13139/13043 |
History
- 1939
Founded by Kaspar Weiß; first extraction in Mainaschaff, extraction and delivery initially by hand and tractor
- 1951
Son Franz Weiß joins the company
- ca. 1950–195
Relocation of extraction to Dettingen
- Ende 1950er
Development of the Alzenau extraction area (Meerhofsee); first floating dredger system put into operation
- 1964
Start of extraction in Großwelzheim (today Karlstein); new processing plant and, for the first time, weighing of sand and gravel
- 1965
Gravel processing plant built in Kahl/Main; extraction there until 1975, followed by reclamation and return of the lakes to the lessor
- 1969
Son Paul Weiß joins the company
- 1972
Kaspar Weiß retires; Franz and Paul Weiß jointly manage the company; renewal of the Karlstein processing plant, extraction in Hörstein (approx. 110 ha)
- 1974
Takeover of the extraction site of the company Höllein in Babenhausen (today approx. 55 ha); processing plant with two floating dredger systems built
- 1976
Takeover of the company Schüttler in Nieder-Roden (today Rodgau)
- 2005
Expansion of the Babenhausen extraction area by approx. 26 ha
- 2017
Renewal of the silo and loading facility including a new screening tower at the Rodgau Nieder-Roden gravel plant
- 2025
Installation of a floating photovoltaic system (approx. 10,000 m², up to 2.1 MW) at the Rodgau gravel plant, investment of approx. €2.5 million