Building With t Radical Hem Crete

7/29/2019 Building With t Radical Hem Crete

1/28

CERTIFICATE No. 91239

Building with TradicalHemcrete


2/28


What is TradicalHemcrete?

Hemcrete is a blend of a special lime based binder(Tradical HB) and specially prepared hemp shiv (TradicalHF)

Together these form a sustainable bio-composite construction

material that combats climate change by capturing carbon anddelivering high performance airtight, insulating walls

The carbon capture environmental benefits of Tradical

Hemcrete are an opportunity NOW and EVERY YEAR tocombat climate change


3/28


TradicalHF is speciallyprocessed industrial hemp


4/28


Industrial Hemp Growing

Industrial hemp is usually grown as a break crop sown

around May and harvested around August

1 hectare (UK) can produce up to 10T of hemp

It takes around 14 weeks to grow from seed to 4m high

(faster than almost any other plant) 60% of hemp is shiv that becomes TradicalHF

6T of hemp is enough to build a typical house

The current set aside agricultural land area is more thanthree times enough land to grow all the hemp needed tobuild all UK housing every year


5/28


TradicalHemcreteWalls

TradicalHemcrete

requires a structural frame

Contributory racking strengthsimplifies frame design

Frame materials can betimber, steel or concrete

The dry environment protectsthe frame materials

Like concrete, TradicalHemcrete can be poured,

placed, pumped and sprayed


6/28


Features of TradicalHemcrete

Carbon captureCreates comfortable

healthy buildings

Fire and pestresistant

Fast and economicconstruction

Recyclable

Low densityHigh thermal insulation

High sound insulation

High thermal inertia

Good vapour

permeability

Flexibility


7/28


The Stern Review

What we do in the next 10 or 20 years can have a profound

effect on the climate in the second half of this century and inthe next

The benefits of strong, early action on climate change

outweigh the costs.

Within a century, average temperatures may rise by between2C & 3C if action is taken now and by as much as 5C if we

carry on as we are.

An illustration of the scale of such an increase is that

we are now only around 5C warmer than in the last ice

age.


8/28


CO2 Emissions

UK CO2 emissions are around 150 million tonnes

per year

Over 50% of UK CO2 emissions come from theconstruction and use of buildings

TradicalHemcretelocks up carbon within thestructure of buildings and reduces ongoingemissions

Tradical Hemcrete can help combat climatechange by delivering better than zero carbon

buildings


9/28


Carbon Sequestration (simplified)

Photosynthesis & molecular weights

water + Carbon Dioxide glucose + Oxygen6H20 + 6CO2 C6H1206 + 6026(18) +6(44) 180 + 6(32)

glucose cellulose + waterC6H1206 C6H1005 + H2 O180 162 + 18

6CO2 = 264 = 1.63 (actual figure 1.84)C6H1005 162


10/28


TradicalHB Binder Constituents

Lime hydrated air lime CL90 to BS EN 459

Cement also a Limestone based, mineral binder productsourced from Castle Cement - the UKs leading energyefficient cement manufacturer*

Mineral fillers

Specialist additives

Patent protected technology

Developed in France over 15 years

* Through the development and use of environmental andsustainable fuel technologies and process control


11/28


CO2 Emissions & Sequestration

TradicalHemcretewall mix

1m of wall mix contains:-

110kg hemp shiv 202kg CO2/m

220kg TradicalHB 94kg CO2/m

Nett carbon capture 108kg CO2/m


12/28


CO2 Emissions Comparison

A 300mm thick

Hemcrete

wallwill lock up

31 kgCO2/m2

A 500mm thickHemcretewall

will lock up

53 kgCO2/m2

Typical new build conventional cavity wall construction

causes around 100 kgCO2/m2 emissions


13/28


CO2 Emission Savings

It is possible to save up to ~150 kgCO2/m2

emissions in a buildings walls by changing materials This could save around 30T of CO2 emissions in the

walls of a typical house*

TradicalHemcreteuse in the roof and floor slabscan increase this to up to 50T per house

The potential savings run into millions of tonnesper year as well as creating better buildings

* (based on semi-detached house with GFA of 48m2 anddetached house with GFA of 52m2)


14/28


Meeting Emissions Targets

In the UK 180,000 new houses are built each year.

Improving the standards to Eco-homes very goodcould save 180,000T of CO2 emissions each year

Changing 3,600 houses from brick & block to

TradicalHemcretecould give a saving of180,000T every year and at least 3,600T each year

Building all 180,000 houses with TradicalHemcrete could save

More than 9 million tonnes EVERY YEAR


15/28


Better than Zero Carbon Building

Combats Global Climate Change through Carbon CaptureWall mix Hemcretecaptures 110kg CO2/m3

300mm thick walls capture 31 kg CO2/m2500mm thick walls capture 53 kg CO2/m2

Reduces Energy Consumption and therefore Cost300mm thick walls exceed Part L requirements (U = 0.26)

500mm thick walls exceed Part L requirements (U = 0.16)Comparison of identical properties confirms lower energy

use in Tradical Hemcrete homes

Delivers Healthier, Comfortable BuildingsVapour permeability results in dry walls that resist mould/fungalgrowth and therefore reduces instance of mould/fungus spores

Complete absence of solvents in materials protects builders,occupants, our workforce and the environment


16/28


The Addnams Project


17/28


The Lime Technology Office


18/28


The Haverhill Hemp Houses


19/28


Thermal Images -2C outside +20C inside

Images by permission of BRE

m

a

so

n

r

y

Hemp

&Lime

front

back


20/28


Construction Costs

Individual properties can achieve parity for wall construction costswith conventional building material construction

Better insulation, hygro-thermal and air-tightness propertiesallow savings in heating / cooling installations

Compatibility with MMC practices, high build speed and ease ofmodification will deliver short build time and lower prelims costs

Low density / light weight saves costs (transport, handling,temporary works, frame etc.)

300mm thick walls* can be built for 120 - 150/m2 500mm thick walls* can be built for 185 - 235/m2

* Includes timber frame, sprayed or cast TradicalHemcrete, limerenderand lime plaster (Standard brick & block build cost range 100 - 150

/m2)


21/28


Construction Practicalities

Training tool box talk for manual application guidance

Sprayed application by approved contractors (SCA list)

Normal construction weather / temperature limitations apply

Shutter removal after 12 24 hours (typical)

Finishes application after 7 days (typical)

Occupation after 6 weeks from wall construction (target)

Monolithic characteristics reduce interface issues andtherefore facilitates achieving high air-tightness

performance

Packaged materials facilitate simple mix ratios

*Single 4 bedroom house walls typically 60 70 m3


22/28


Shuttered Tradical

Hemcrete


23/28


Sprayed TradicalHemcrete


24/28


Other TradicalProducts

Tradicaltechnology is also available and in development

for the UK market to deliver high performance, bio-composite, insulation construction products for:

Lightweight floor insulation

Lightweight roof insulation Existing walls retrofit insulating, decorative plasters

& renders

Carbon neutral block walling

ModCell pre-cast structural panel system build


25/28


Renovation of Existing Buildings

(M a is o n D io c s a in eC h alo n s enC h am p ag ne / 2 0 0 4 )


26/28


Blocks in Development


27/28


Summary

Tradical Hemcrete locks up carbon from CO2 and offers

the opportunity of better than zero carbon buildings NOW TradicalHemcreteis compatible with other natural, low

embodied energy materials

Building all new houses in the UK using Tradical

Hemcrete could save more than 9 million tonnes of CO2emissions every year

Millions more tonnes of CO2 emissions could be saved everyyear if commercial, industrial and public buildings were also built

using Tradical Hemcrete More information is available on our website

www.tradical.co.uk


28/28


Thank you on behalf of all the partners

Building With t Radical Hem Crete

Documents

Transcript of Building With t Radical Hem Crete