Lecture 8 - Intro to deleterious and hazardous materials PDF

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Intro to deleterious and hazardous materials...

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Intro to deleterious and hazardous materials - Control of asbestos Deleterious and hazardous materials - Deleterious materials ! - Damaging to buildings ! - Degrade with age - causing structural problems ! - Hazardous materials ! - Harmful to occupants ! - Either built into building or from land !

! Deleterious materials

- High alumina cement concrete (HAC)! - Three roof collapses 1970’s ! - Large number of HAC buildings remain in the uk - all require monitoring ! - Brick slips ! - 1970-80’s contrete frame ! - Thin bricks stuck onto concrete nibs supporting masonry panel ! - Slips fail and fall ! - Calcium silicate brickwork ! - Significant thermal and moisture movement ! - Not understood when first used - no expansion joints ! - Building exhibit significant cracking !

Deleterious materials

- British council for offices (BCO) - Good practice in the selection of construction materials (2011) ! - List of all materials considered to be deleterious ! - Referred to in professional appointments !

Hazardous materials

- Lead ! - Casuses poisoning ! - Concern about effect on children development ! - Lead in upper soil (topsoil) - from industrial activities and car exhausts ! - Lead in paint dust ! - Still used in buildings (roofing materials) ! - Asbestos ! - Used as insulation material and for fire protection (now banned) ! - Airborne fibres inhaled - cna cause cancer ! - Risk for construction workers ! - Legislation - Control of asbestos regs 2012 - Duty holders ! - Refurbishment and demotion survey !

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Control of asbestos regulations 2012 (CAR 2012) ! Management of asbestos

- CAR 2012 requires duty-holder to manage asbestos in ‘non-domestic premises’ (CAR reg 4.)! - Duty-holder can be managing agent/developer (the person responsible for repair and maintenance) !

- Breach of regs is a criminal offence !

Asbestos use in buildings

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Management of asbestos

- Duty-Holder’s obligations include : ! - Find and assess presence and conditions of ACM’s (NB type 2 demolition survey) ! - Keep records ! - Prepare management plan including measures to manage risk of asbestos material s!

Asbestos use in buildings -...