CONCRETE PERFORMANCE. Jeff Dyson Head of Housing Solutions. The Concrete Centre

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1 CONCRETE PERFORMANCE Jeff Dyson Head of Housing Solutions The Concrete Centre

2 CONCRETE PERFORMANCE Sustainability Thermal Mass Fire Acoustics Security Vibration Durability Air tightness Flood resistance

3 CONCRETE PERFORMANCE Sustainability Thermal Mass Fire Acoustics Security Vibration Durability Air tightness Flood resistance

4 Cement Aggregates Reinforcement SUSTAINABILITY ENERGY PERFORMANCE TARGET (Cement Specific Energy Consumption kwh/te ) Target commitment is 26.8% improvement from 1990 to 2010 kwh/te cement Target SEC kwh/te Actual SEC kwh/te Note: The mid-point has been taken for nonmilestone years Year

5 Cement Aggregates Reinforcement SUSTAINABILITY

6 Cement Aggregates Reinforcement SUSTAINABILITY

7 CONCRETE PERFORMANCE Sustainability Thermal Mass Fire Acoustics Security Vibration Durability Air tightness Flood resistance

8 THERMAL MASS Timber frame Brick, medium-weight block & plasterboard Brick, heavy-weight block & dense plaster Brick Brick Airspace Airspace Brick Plywood Insulation Plasterboard Insulation Medium-weight block Plasterboard Insulation Heavy-weight block Dense plaster Admittance 0.9 Admittance 3.0 Admittance is measured in W/m 2 K Admittance 5.7

9 The inherent thermal mass in masonry and concrete housing can help to: 1. minimise overheating; a growing 21 st century problem linked to climate change 2. provide warmth in the winter by capturing solar gains (passive solar design) Living Room Temperature of a Low and High Mass House - Summer 2050 (Arup/CIBSE research 2005) Nightingale Estate, East London Concrete dwellings, benefiting from passive solar design in winter

10 The perception that concrete has a high embodied CO 2 can overshadow its thermal mass benefits Construction News 26 May 2005 I like the argument, but I d feel happier if someone could just check that the CO 2 saving you get from a concrete building compensates for the large quantity of CO 2 driven into the atmosphere when limestone is burnt to make cement

11 Arup was commissioned to calculate and compare embodied and In-use CO 2 emissions from a low, medium and high thermal mass house Type: two-bed starter home Location: south east England orientation: south Construction: timber frame masonry (3 weights) Calculated embodied CO 2 : Timber frame: 32 tonnes Masonry - mediumweight: tonnes (1.25 tonnes more) Masonry - medium-heavyweight: 35 tonnes (3.0 tonnes more) Masonry - heavyweight: 37 tonnes (4.9 tonnes more)

12 Cumulative CO 2 Emissions (air-conditioned case) 140 Light Emissions (tonnes) CO Medium-heavy & heavyweight: Additional embodied CO 2 offset in 21 to 23 years Medium Medium-heavy & heavy 20 Mediumweight: Additional embodied CO 2 offset in 11 years Year

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14 THERMAL MASS Embodied CO 2 in a concrete house Savings in operational CO 2 emissions by having a concrete house

15 THERMAL MASS Passive FES: exposed soffits + night purging (15-20 W/m 2 cooling) Active FES: controllable systems of ducted air (25-35 W/m 2 cooling and beyond). Toyota HQ, Surrey (courtesy of Barry Bulley/Trent Concrete Ltd).

16 CONCRETE PERFORMANCE Sustainability Thermal Mass Fire Acoustics Security Vibration Durability Air tightness Flood resistance

17 FIRE PERFORMANCE

18 FIRE PERFORMANCE Half of businesses affected by fire will not continue to operate Protection of goods/property Protection of environment Life Safety

19 FIRE PERFORMANCE Protection of goods/property Comprehensive fire protection with concrete Protection of environment Life Safety

20 FIRE PERFORMANCE Fire Design Criteria. A: The structure should retain its loadbearing capacity. B: The structure should protect people from harmful smoke and gases. C: The structure should shield people from heat.

21 CONCRETE PERFORMANCE Sustainability Thermal Mass Fire Acoustics Security Vibration Durability Air tightness Flood resistance

22 ACOUSTICS 5 primary ingredients that acousticians look for: I s o la ti o n Mass Absorption STIFFNESS ReSiLience

23 ACOUSTICS 4 unique complimentary ingredients: I s o la ti o n (cavity walls) Mass Damping STIFFNESS

24 ACOUSTICS

25 E1-Approved Robust Details:Separating Floors ACOUSTICS

26 ACOUSTICS Acoustic report No P0818 REP01-IE Floors : Airborne Passed 51>45dB Impact Passed 50<62dB 65mm screed on resilient layer 200mm hollow core concrete 12.5mm plaster board on channel supports Walls : Airborne Passed 50>45dB 2 layers of 12.5mm plaster board supported by channel system with 70mm Isowool 150mm concrete panel 12.5mm plaster board on 38x25 battens

27 CONCRETE PERFORMANCE Sustainability Thermal Mass Fire Acoustics Security Vibration Durability Air tightness Flood resistance

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29 SECURITY

30 CONCRETE PERFORMANCE Sustainability Thermal Mass Fire Acoustics Security Vibration Durability Air tightness Flood resistance