Blocks made from sewage cut CO2

Aaron Morby 6 years ago
Share

Yorkshire Water has teamed up with Leeds University to trial house blocks made from incinerated sewage ash.

Picture 6

The blocks combine ash from incinerated sewage with vegetable oil to make blocks which are classified as carbon-negative because the oil comes from plants which have sucked out C02 from the atmosphere.

The university spin-out company Encos has been specialising in alternatives to traditional building methods and the new blocks are being developed for commercial use.

During a patented process standard oils undergo a number of complex chemical reactions which transform it from a viscous liquid into a solid binding matrix.

Masonry units incorporating the binders and manufactured at the Encos laboratories have successfully passed crucial industry tests including fire, freeze-thaw and compressive strength.

The firm has also produced bricks and slips using the process.

The products were also successfully used in the construction of several ‘test walls’ including one at Poundbury – the urban development project built on land owned by the Duchy of Cornwall.

Jon Brigg, a spokesman for Yorkshire Water, said the bricks and blocks were classed as carbon negative because the plants used to make the vegetable oil have absorbed CO2 from the atmosphere.

He said: “We are always looking for ways in which we can make the best use of our waste to have a positive impact on our environment, and this project is a great way to reuse incinerated sludge ash which has traditionally been sent to landfill.

“With new building regulations coming into force in the next few years home builders will need to reduce the embedded carbon cost of all new homes – the bricks and blocks will provide a perfect alternative to traditional house bricks.”

A scale production plant is in design and is planned for operation in 2012.

Encos masonry blocks and bricks have been calculated to achieve a reduction of 160% and 120% respectively in greenhouse gas emissions, compared to traditional clay bricks and concrete blocks.

Latest news

Mace to build third Shard tower

Construction manager appointed for 26-storey resi scheme
7 hours ago

Phenolic foam board cladding system fails fire test

At least 228 buildings must be reclad after latest fire test result
11 hours ago

ISG set for 2.2m sq ft Amazon mega-shed

Contractor in line for Amazon's first self-developed fulfilment centre
10 hours ago

Balfour seals final Great Western electrification deal

Work to start immediately on Cardiff to Bristol Parkway route
7 hours ago

Balfour replaces Costain on Hinkley Point tunnels job

Costain exits £200m-plus Hinkley Point marine package
1 day ago

Chinese firm buys cladding giant Permasteelisa for £426m

Deal creates leading global curtain walling company
1 day ago

Profit growth outstrips building rise at Persimmon

Housebuilder vows strong cost control "to deliver the best outcomes for our shareholders."
11 hours ago

Multiplex inks £240m deal for Jenga tower

Contractor wins ultra-luxury scheme at Nine Elms
1 day ago

Engineers probe multi-storey car park collapse

Nottingham NCP deck failure leaves cars dangling in mid-air
1 day ago

Balfour Beatty set to pull support for CITB

Group chief executive Leo Quinn fires broadside at training body
2 days ago

Carillion crisis chief Richard Howson returns to helm

Former chief executive back in a senior role just weeks after stepping down
4 days ago

Contest starts for 480 Manchester student rooms

Manchester Metropolitan University seeks contractor for £27m Birley campus project
1 day ago

Public sector clients breaking prompt payment promises

Two-thirds of engineering services specialists being made to wait more than 30 days for their money
1 day ago

Autumn start for £30m Yorkshire village flood scheme

VolkerStevin jv to start Mytholmroyd village flood scheme
2 days ago

McAlpine set for £29m Big Ben overhaul

Contract to be confirmed when MPs return to Parliament in early September
1 day ago

Argent unveils Birmingham Paradise phase 2

290,000 sq ft One Centenary Way will be third office project at Paradise scheme
4 days ago

Subbies start winding-up petition against Titan Construction

Financial crisis at firm where ISG founder David King is chairman
4 days ago

J S Wright lands £10.5m Fish Island M&E package

26-month deal for major new resi scheme in Hackney Wick
4 days ago

Race starts for one of biggest demolition jobs of 2017

Six Grimsby tower blocks to be demolished
5 days ago

Major York city mixed-use scheme approved

Four block redevelopment of Hudson House near railway station approved
4 days ago

Midas construction margin edges up to 0.5%

South western builder sees recovery in profit to £1.6m
5 days ago

Colas to trial driverless cone laying vehicles on roads

Autonomous Impact Protection Vehicles can make highways sites safer: Video
4 days ago

Multiplex quits £750m Stage of East London project

Client hunts for new contractor to deliver vast scheme on Shakespeare’s Curtain Theatre site
5 days ago

Graham bags £19m East Anglian highways upgrade

Growing civils arm bags biggest highways package in over two years
5 days ago

Betting Spy: Defence is a dying art in the Premier League

Goals guaranteed this season while a home win treble can pay a 7/1 return
5 days ago

A2Dominion ramps up homes target to 6,000

Leadership shake-up to raise private rental and homes for sale
6 days ago

VolkerHighways names new ops director

Former Kier highways general manager Jerry Pert joins Volker
5 days ago

Contractors named and shamed over minimum wage

Builders among latest list of offenders published in government crackdown
5 days ago

Virtual reality set to spread across construction sites

Research programme to push use of high-tech headsets
5 days ago

Time nearly up for skills cards for fringe trades

85,000 recently issued Construction Related Occupation cards become obsolete within weeks
5 days ago

Contractor services