The Dudman Group invest in a Terex Washing Systems AggreSand™ 165

22 May 2018

Based in Southwick, West Sussex the Dudman Group has over 30 years-experience in the Construction and Logistics sectors.

Originally the company started life as a haulage firm which over the years has grown into the Dudman Group of Companies, which is today an independent group that supplies aggregates and ready-mixed concrete.

Working across the south coast with a haulage fleet of 40 vehicles, including tippers, articulated trucks, mixers and sweepers the company has been successfully involved in many high-profile projects including the current development at Brighton Marina.

The company operate out of depots across Sussex and Hampshire and own 8 quarries in Sussex processing sand and gravel and recycled products.

Their crown jewel however is the St. Keverne quarry in Cornwall which has 20 million tonnes of resource and its own quay side. A whole range of products from granite dust, to type 1 and rock armour up to 9-tonnes in size is delivered by ship to Southwick where it is despatched to clients.

More investment:
Recently the company have made further investment in a new AggreSand™ 165 plant for their Albion Wharf operation which has been supplied by Duo Group who are the English and Welsh dealer for Terex Washing Systems (TWS).

Steve Dudman – MD for the Dudman Group, comments, “We have had a long successful relationship with Duo and the TWS product, with 90% of all our crushers and screens being Powerscreen, so it made perfect sense to continue the relationship and invest in further plant that we have full confidence in. This is the second AggreSand™ 165 we have sourced from Duo as they recently installed one at our Kingsham Sand and Gravel Quarry at Chichester which has been operational since last August and has provided trouble free operation.”

With the civils completed in-house the AggreSand™ 165 electric plant was installed and commissioned by Duo in December and is now employed processing sea dredged ballast. A cargo of 4,500 tonnes is delivered by dredger on a weekly basis, or more frequently to satisfy any increased demand. A 5-acre site at Southwick allows the company to effectively handle the consumption and production of this material.

The Sand & Gravel Plant:
From the impressive TWS range, the AggreSand™ 165 is delivered pre-wired and pre-plumbed and is an easily installed modular concept that combines aggregate washing and screening with sand processing. Facilitating quick installation, it is a combination that is very appealing in terms of access, serviceability and modularity.

Steve, commented, “It’s a very neat compact plant incorporating an in-line system with the sea dredged ballast being fed by loading shovel into the feed hopper. As there was still some life left in our existing sludge tank and pump we used these to feed the sand plant. It’s a very simple and effective set-up that works very well.”

Installed and commissioned in December 2017 the plant is currently processing material well within its capabilities and producing a sharp sand in addition to 10/20/40 and +40mm products.

The Aggresand™ 165 uses the H12 (12M3) feed system which is fed by wheel loader via a heavy duty 4m static grid which are both powered by an integral 37Kw electric hydraulic powerpack.

Material is then delivered onto the main inclined feed conveyor which is driven by an 11Kw Weg electric motor and Bonfiglioli® gearbox mounted on the drive drum. The 19m long main conveyor has a 1050mm wide belt and has an integral heavy-duty rubber lined wash box which soaks the material before it is delivered to the rinsing screen.

The AggreSand™ 165:
The innovative AggreSand™ 165 at Albion Wharf features a 4.9m x 1.5m triple-deck rinsing screen working at 18◦ angle which utilizes individually controlled spray bars on each deck. The 2-bearing screen is fitted with polyurethane modular media supplied by the Dudman Group. The screen decks then split the required products which is then stockpiled via conveyors. Material off the bottom deck is then fed to the sand plant to produce a sharp sand.

The Dudman AggreSand™ 165 is a high capacity sand plant utilising a 4.3m x 1.8m dewatering screen capable of up to 200tph. Consisting of two 30Kw 200/150 sand pumps working with a G4-660mm cyclone and a G4-500mm cyclone they produce a clean in-specification sand which is delivered by conveyor to stockpile.

Steve, concluded, “the plant has worked perfectly since installation and never missed a beat. It’s a testament to Duo as we purchased our first rinse plant off them some years ago and we have just retired it after it had processed close on to 2.5 million tonnes, so ROI has been very good.”

Total Solutions:
Terex Washing Solutions provide cohesive solutions for all material and mineral washing needs through their English and Welsh dealer – Duo. Focussing solely on solutions for the quarry, aggregate, mining and C&D recycling industries it is dedicated in providing reliable, high quality and very productive equipment. This is achieved through a broad product portfolio which offers modular, mobile and static wash plants with the ability to work in many applications. Meeting individual materials and mineral washing needs to achieve today’s stringent specifications of clean material is at the top of the agenda.