Extraction and processing of quartz sand in seven standardized grain fractions for industry, construction, and landscaping.

Industriesandwerk Robert Hardt GmbH & Co KG

KelsterbachNew on Amplifa

1978Founded

1Operating site in Kelsterbach

0.10–4.00 mmGrain fractions K101–K105

7:00–17:00Collection from plant (Mon–Fri)

About Industriesandwerk Hardt

Industriesandwerk Robert Hardt GmbH & Co KG in Kelsterbach has been extracting quartz sand since 1978 and processing it into refined natural sands with standardized chemical and physical characteristics. The raw sand is extracted above and below the groundwater table using clamshell excavators and is then processed by washing, desliming and de-wooding, drying with dedusting, and screening into the grain fractions K101 to K105 (0,10 to 4,00 mm). The quartz sand is characterized by a high SiO2 content and high refractoriness and is used, among other applications, in the chemical and glass processing industries, in the foundry and ceramics industries, in construction chemicals, and as filter sand in swimming pool technology. Delivery is made in bulk, by silo or tipper trains, in 25 kg or 40 kg bags, or in big bags; collection from the plant is possible Monday through Friday.

Site: Kelsterbach
Processes: Sand processing (washing, desliming and de-wooding), Drying with dedusting, Screening into individual grain fractions (K101–K105, Ø 0.10mm–4.00mm), Blasting sand supply (blasting), Loading in bulk, silo or tipper trains, bags (25kg and 40kg), big bags, Sand processing and refining, Collection from plant (Mon–Fri 7:00–17:00), Loading in bulk, silo/tipper trains, bags (25 kg/40 kg), big bags
Materials: Quartz sand (natural sand, high SiO2 content, high refractoriness), Quartz sand K101, Quartz sand K102, Quartz sand K102F, Quartz sand K102G, Quartz sand K103, Quartz sand K104, Quartz sand K105
Certificates: Test report DIN EN 1177 (impact protection sand), Test report DIN 4924 (well construction), Test report DIN EN 12904 (drinking water), Test reports DIN 18035-7 (sports facilities), ISO 9001
Founded: 1978
Industries: Construction chemicals, Construction industry, Sports/golf course construction, Foundry industry, Ceramics industry, Corrosion protection

01
Raw sand extraction with clamshell excavators above and below the groundwater
02
Washing, desliming and de-wooding
03
Drying with dedusting
04
Screening into individual grain fractions (K101–K105)
05
Loading in bulk, in silo/tipper trains, bags or big bags

Materials and Processes

K101

Quartz sand K101 (Ø 2.20–4.00 mm)

Used in construction chemicals, as filter gravel in well construction, for floor fills, and in landscaping.

K102

Quartz sand K102 (Ø 1.20–2.20 mm)

Used, among other applications, for dry mortar, roofing felt sanding, brake sand, gritting sand, and blasting sand.

K102F

Quartz sand K102F (Ø 1.00–1.50 mm)

Additionally suitable for sound insulation applications.

K102G

Quartz sand K102G (Ø 1.50–2.20 mm)

Used for dry mortar, filter gravel, roofing felt sanding, and blasting sand.

K103

Quartz sand K103 (Ø 0.60–1.20 mm)

Used as filter sand in swimming pool technology, for artificial turf and tennis court sanding, as well as golf course maintenance.

K104

Quartz sand K104 (Ø 0.40–0.60 mm)

Used as blasting sand, playground box sand, and in construction chemicals.

K105

Quartz sand K105 (Ø 0.10–0.40 mm)

Used in tile adhesives, polymer concrete, the roofing felt industry, and as blasting sand.

Locations

Kelsterbach

Production and operating site

Materials: Quartz sand (natural sand, high SiO2 content)

Clamshell excavators for raw sand extraction
Washing, desliming and de-wooding system
Drying with dedusting
Screening system for grain fractions

Products and Grain Sizes

**Quartz sand K101 (Ø 2.20–4.00 mm)**Natural sand · Construction chemicals and well construction

**Quartz sand K103 (Ø 0.60–1.20 mm)**Natural sand · Swimming pool technology and sports facility construction

**Quartz sand K104 (Ø 0.40–0.60 mm)**Natural sand · Blasting sand and playground construction

**Quartz sand K105 (Ø 0.10–0.40 mm)**Natural sand · Construction chemicals and roofing felt industry

Inside the production

Industriesandwerk Robert Hardt GmbH & Co KG

Certified impact protection sand for playgrounds

Industries

Construction chemicalsConstruction industrySports/golf course constructionFoundry industryCeramics industryCorrosion protectionTransportation sectorWater managementLandscapingPlayground constructionSwimming pool technologyRoofing felt industryWell constructionChemical industryGlass industry

Processes & technical limits

Processes	Tolerance	Max. part	Weight	Lot size	Materials
Sand processing (washing, desliming and de-wooding)Other	–	–	–	–	Quartz sand
Drying with dedustingHeat treatment	–	–	–	–	Quartz sand
Screening into individual grain fractions (K101–K105, Ø 0.10mm–4.00mm)Other	–	–	–	–	Quartz sand
Blasting sand supply (blasting)Surface	–	–	–	–	Quartz sand
Loading in bulk, silo or tipper trains, bags (25kg and 40kg), big bagsAssembly	–	–	25kg	–	Quartz sand

1 Anlagen & Maschinen

Machine	Manufacturer / model	Quantity	Working area	Year built	Site
Clamshell excavators (raw sand extraction)	–	–	–	–	Kelsterbach

Additional services

Sand processing and refiningCollection from plant (Mon–Fri 7:00–17:00)Loading in bulk, silo/tipper trains, bags (25 kg/40 kg), big bags

Quality and Testing

The product range is supported by sieve analyses as well as test reports from independent institutes, including according to DIN EN 1177 (impact protection sand), DIN 4924 (well construction), and DIN EN 12904 (drinking water). Test certificates and safety data sheets are available in the download area.

Evidence	Kelsterbach
Test report DIN EN 1177 (impact protection sand)
Test report DIN 4924 (well construction)
Test report DIN EN 12904 (drinking water)
Test reports DIN 18035-7 (sports facilities)
ISO 9001

History

1978
Company founded in July 1978; production started in August 1978
Partners have over 50 years of experience in sand processing and refining