Tonnage
130 t/h
Material
C&D Waste, Excavation Waste, Sand & Gravel, Utility Arisings
Output
0-1mm Sand | 0-2mm Sand | 0-4mm Sand | 4-8mm Aggregate | 8-16mm Aggregate | 16-32mm Aggregate | 32-80mm Aggregate | Filter Cake
Entreprise Spiess specialises in material recycling, public and private works across demolition and construction, and equipment freight and rental. Based in Central Alsace, the company works with national and regional public works companies, local builders and developers, as well as local and regional authorities.
By commissioning an innovative new recycling facility from CDE, capable of washing both natural products and excavation waste, the family-run business has expanded its operations to recycle excavation waste at its Sablière Oesch site, a sand and gravel quarry in Lingolsheim, strategically located close to the major axes of the Strasbourg Eurometropolis.
The Challenge
One of the largest capital investments in the company’s history, the commissioning of the new plant is a milestone moment for Entreprise Spiess as it advances its sustainability aims and its contribution to the circular economy in the construction industry region wide.
The primary requirement was to engineer a solution that could recycle over 200,000 tonnes of inert waste per year, into eco-materials that are like-for-like in terms of quality when compared to their natural counterparts, in a bid to ease pressure on fast depleting finite natural resources.
Solution
Commissioned in March this year, and delivered within one year, the new plant boasts exceptional versatility, capable of processing both excavated soils from public works alongside natural materials like sand and gravel from nearby quarries.
The backbone of the process is CDE’s AggMax™ scrubbing and classification system, which combines pre-screening, washing, scrubbing, lighweight and organics removal, and sizing on a compact chassis to produce a range of washed and graded aggregates ready for market straight from the belt. It’s complemented by an advanced sand treatment solution, which includes three CDE EvoWash™ sand washing systems – one of which integrates CDE’s Counter Flow Classification Unit (CFCU) – to recover a variety of in-spec construction sands. Integrating with the sand washing and classification process is CDE’s ShearClean™ attrition cells and an organics screen which maximise fines recovery and provide efficient removal of contaminants to ensure consistently graded sand products.
Industry-leading water management and recycling, enabled by a combination of CDE’s AquaCycle™ thickener, a filter press, and a series of buffer and water storage tanks, underscores the solutions and ensures the recovery of the process water for immediate re-use in the washing process.
TECHNOLOGICAL ADVANCEMENTS
The sophisticated wash plant also features a number of technological advancements, including intelligent de-stocking by radial conveyors. It allows for differentiated storage of final products, helping to optimise space availability on-site and ensure products are quickly and accurately separated.
CDE SmartTech enables Entreprise Spiess to understand how the plant is performing by providing real-time data analysis and insights to facilitate informed decision-making that can increase productivity, improve operational efficiency and maximise up-time. In addition, CDE’s OptiMax, part of its suite of intelligent plant optimisation tools, is constantly reading live material data in the washing process and advising the loading operator on how they can improve their performance.
The Result
Processing a mix of excavated soils and natural materials the wash plant had produced 10,000 tonnes of output within its first two weeks of operation. By the end of its first three months, it has produced over 50,000 tonnes.
Entreprise Spiess CEO Jean-Michel Spiess said: “CDE’s solution is enabling us to responsibly manage the waste streams from our construction activities and limit the consumption of natural resources, all whilst producing high-quality, in-spec eco-materials. We’re confident this plant will contribute positively, both environmentally and economically, to the region.”
Entreprise Spiess is producing nine products, including washed eco-sands in 0-1mm, 0-2mm and 0-4mm; washed eco-aggregates in 4-8mm, 8-16mm, 16-32mm, 32-80mm; and a filter cake.
The company’s product suite of eco-sands and eco-aggregates are supporting major civil engineering, infrastructure, and public works projects while its natural materials meet CE standards for use in concrete production.
