hemp concrete

25
Hemp concrete HEMP CONCRETE Insulation plant 1 Alexandre GACOIN ERASMUS INTENSIVE PROGRAM 2010 PASSIVE HOUSE CONCEPT Multi-Disciplinary International Project in Passive Design & Construction

Upload: shubha

Post on 25-Feb-2016

95 views

Category:

Documents


1 download

DESCRIPTION

HEMP CONCRETE. Insulation plant. ERASMUS INTENSIVE PROGRAM 2010. PASSIVE HOUSE CONCEPT. Multi- Disciplinary International Project in Passive Design & Construction. 1 Hemp concrete, why? 1.1 Sustainable Development 1.2 Importance of energy-efficient buildings for the environment - PowerPoint PPT Presentation

TRANSCRIPT

Page 1: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 1

HEMP CONCRETEInsulation plant

ERASMUS INTENSIVE PROGRAM 2010

PASSIVE HOUSE CONCEPT

Multi-Disciplinary International Project in Passive Design & Construction

Page 2: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 2

Summary1 Hemp concrete, why?

1.1 Sustainable Development1.2 Importance of energy-efficient buildings for the environment

2 Hemp concrete2.1 Hemp2.2 Lime

3. The characteristics of hemp concrete (data TRADICAL®)3.1 Evolution of the mechanical characteristics3.2 Energy performance

4. Implementation4.1 Wall insulation: Wood frame4.2 Dubbing interior insulation: mineral media4.3 Moisture Coating: Inside/Outside4.4 Insulation covering : Soil and floor4.5 Roof Insulation

Page 3: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 3

1. Hemp concrete, why?1.1 Sustainable Development

1961 1961 2009

humanity's accumulative ecological debt

Num

ber o

f Ear

th1

0.5

1.5

Throughout the nineteenth century, the concept of economic growth was based on economic criteria.

In 1970, it is estimated that man consumed each year more natural resources than the nature would regenerate.

In the same year, the concept of sustainable development appeared and became a significant factor.

In the late twentieth, the developed countries realized that their wealth was based on intensive use of natural resources and that this mode would not last.

=

wealth intensive use of natural resources

Page 4: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 4

The concept of sustainable development was defined in 1987 by the World Commission on Environment and Development:

"development that meets the needs of the present without compromising the ability of future generations to meet their own needs.“

The three pillars of sustainable development

EconomySociety

Environment

Sustainable development implies economic growth together with the protection of environmental quality.

This form of development is a stable relationship between human activities and the natural world, which does not reduce the prospects for future generations to enjoy a life quality at least as good as our own.

Page 5: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 5

1.2 Importance of energy-efficient buildingsIn the context of sustainable development, the construction, representing for 30% to 40% of global consumption of energy, plays a significant role.

It is urgent to reduce the impact of buildings on the environment and to make buildings more energy-efficient:

Significantly reduce the energy consumption of buildings and improve energy-efficiency

Page 6: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 6

In the fight against global warming, you must develop new resources that have an ecological, social and economic interest .

Among these new resources, materials derived from plants are increasingly used in the buildings due to their considerable strengths.

The hemp concrete combines the hemp qualities and lime qualities. Knowledge of these two products enables the implementation of hemp concrete and optimize its performance.

Hemp Flax Jute

Ramie Kenaf Bamboo

Page 7: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 7

2. Hemp concrete

+

Hemp

Pure limestone

Hemp shives

Lime(slaked-lime)

Hemp concrete !

Page 8: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 8

2.1 HempRobust plant that can quickly produce large quantities of material

Its culture is very respectful for the environment • little or no pesticides • no fertilizers• little water ...

Page 10: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 10

2.1.1 Hemp fiber

In a cross section of hemp stalk, one notices that the thick-walled cells at the periphery: they are fibers.

They serve to keep the right plant for its growth, and are the backbone.

When the hemp is mature, the dried fibers represent approximately 35% of the weight.

They are used for making paper pulp and for the manufacture of wool insulation.

Page 11: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 11

2.1.2 Hemp shivesThe hemp shives are the central part of the hemp stalk. It’s the wood of the hemp stalk.

It represents 45% of the weight of dried hemp.

The hemp shives are in the form of aggregates.

The hemp shives particles have a very low density and are very efficient in thermal and sound insulation.

For building applications, the hemp shives are sifted and sorted to obtain the desired size.

They are used for making mortars and light-weighted concrete insulation

Page 12: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 12

2.2 Lime2.2.1 DefinitionThe lime comes from cooking of the purest limestone up to 900 ° C .

It is a healthy material for natural buildings

• Foundation• Mortar• Waterproofing• Masonry

limestone

Page 13: HEMP CONCRETE

Hemp concrete

2.2.2 The Limestone Life-Cycle

13

LimestoneCalcium

Carbonate(CaO3)

QuicklimeCalcium Oxyde

(CaO)

Slaked limeCalcium

Hydroxide Ca(OH)2

Fresh mortar

Water (H2O) evaporation when dryingSurface is exposed to Carbone dioxyde and uses (CO2)CARBONATION

Adding Sand and Water

AddedWater (H2O)

ExtractCarbon dioxyde (C02)

Water (H20)

CALCINATION(Burn at 900°C)

SLAKING AGED ADDING MINERALS

APPILCATION

powder

A limestonequarry extraction

blast furnace

Page 14: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 14

3. The characteristics of hemp concrete (data TRADICAL®)3.1 Evolution of the mechanical characteristics3.1.1 Durability• The new hemp concrete have a very good cohesion and very low density (<500kg/m3).• He had good results with freeze-thaw tests.

NHL2 NHL 3,5 NHL Z5 Tradical PF70

0

2

4

6

8

10

12

14

16

18

20

num

ber o

f cyc

lesHemp concrete made with pure hydraulic

binders (NHL) does not resist more than 2 cycles.

The hemp concrete TRADICAL® resists 20 cycles. (This result is comparable only to pure limestone!)

0

°C

t

Page 15: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 15

3.1.2 Compressive strength

• The tests on hemp concrete made with natural hydraulic lime NHL does not exceed the compressive strength, (0.46 MPa).• The hemp concrete Tradical® resists to 1.46 MPa.

NHL2 NHL 3,5 NHL Z5 Tradical PF70

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

MPa

90

days

Page 16: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN

3.2 Energy performance3.2.1 Hemp concrete and RT 2005

16

•The thermal transmittance of a wall is rated “U”.

It characterizes the amount of heat passing through a wall, per unit time per unit area and unit temperature difference between the atmospheres located on both sides of the wall.

The heat transfer coefficient expressed in W / m² K is the inverse of thermal resistance (R) of the wall. If its value is low, the construction will be well insulated.

• 26 cm concrete hemp Tradical ® provides a heat transfer coefficient U=0.38 W/m2.K, compatible with the existing thermal regulation RT 2005.

heat

Inside Outside

U=0.38 W/m2.K

Hemp Concrete220 kg/m3

26 cm

Page 17: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 17

• Compared to other common materials with similar thermal resistance, “embodied energy” requirements for the manufacture of 1m2 hemp concrete wall are low.

(“Embodied energy” is the sum of all the energy needed to produce, use and recycling materials for industrial products)

Hemp c

oncre

teTrad

ical®

(26 c

m)

Terrac

otta (

37 cm

)

Concre

te blo

ck+P

SE

Cellula

r con

crete

(30 cm

)0

0.600000000000001

1.2

1.8

2.4

32.36 2.5 2.36 2.5

Ther

mal

esi

stan

ce (R

)

Hemp c

oncre

teTrad

ical®

(26 c

m)

Terrac

otta (

37 cm

)

Concre

te blo

ck+P

SE

Cellula

r con

crete

(30 cm

)0

1.22.43.64.8

67.28.49.6

10.812

3.94

11.69

6.365.6

Embo

died

ene

rgy

Page 18: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 18

3.2.2 Hemp concrete and RT 2010

chaleur

Inside Outside

U=0.2 W/m2.K

Hemp Concrete110 kg/m3

220 kg/m3

26 cm

To be consistent with the thermal regulation in 2010, the building walls must have a heat transfer coefficient U of the order of 0.2 W/m2.K.

By varying the composition of hemp concrete can reach these values without much increase of the wall thickness.

5 cm5 cm

Page 19: HEMP CONCRETE

Hemp concrete

3.2.3 Hemp concrete = Negative Carbon

Alexandre GACOIN 19

Like all plants, hemp uses carbon dioxide (CO2) from the air for growth. One hectare of hemp can use 15 tons of CO2 before its maturity.

300 round trips between Paris and London by plane!

The impact "Greenhouse Effect" of hemp concrete is -0.35 kg of CO2 while most materials emit CO2 0.50 kg or more ...

Negative Carbon Hemp Walls are 7 times Stronger than Concrete

Hemp c

oncre

teTrad

ical®

(26..

.

Terrac

otta (

37 cm

)

Concre

te blo

ck+P

SE

Cellula

r con

crete

(30 cm

)

-0.4-0.2

00.20.40.60.8

11.21.41.6

-0.35

1.47

0.49 0.5225kg C

O2

Page 20: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 20

4. Implementation4.1 Wall insulation: Wood frame

Water Lime putty Boon

+

+

=200 L Hemp concrete

60 à 70 L 44 kg 200 L

Composition to be determined 220 kg/m3

Density 330 kg/m3

Thermal conductivity λ = 0,085 W/m.kCompressive strength at 90 days 0,9 MPa

Characteristics

Hemp shivesAir lime

Page 21: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 21

4.2 Dubbing interior insulation: mineral media

Dubbing insulation de 5 à 20 cm

Finish Coating

Rough-cast= + +60 L sand

Water Lime putty Boon

+

+

=200 L Hemp concrete

80 à 100 L 66 kg 200 L

Dubbing insulation de 5 à 20 cm

Finish Coating

Rough-cast= + +60 L sand

Mortar to be determined 330 kg/m3

Density 440 kg/m3

Thermal conductivity λ = 0,107 W/m.k

Dubbing insulation de 5 à 20 cm

Finish Coating

Rough-cast= + +60 L sand

Hemp shivesAir lime

From 5 to 20 cm

Page 22: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 22

4.3 Moisture Coating: Inside/Outside

Coating

Rough-cast = + +60 L sable

Coating

Water Lime putty Boon

+

+

=200 L Hemp concrete

110 L 165 kg 200 L

Dosage 825 kg/m3

Density 935 kg/m3

Thermal conductivity λ = 0,19 W/m.k

Dubbing insulation de 5 à 20 cm

F inish Coating

Rough-cast= + +6 0 L sand

Hemp shivesAir lime

sand

Page 23: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 23

Water Lime putty Boon

+

+

=200 L Hemp concrete

_80 à 100 L 55 kg 200 L

Air lime

4.4 Insulation covering : Soil and floor

Hemp shives

275 kg/m3

385 kg/m3

λ = 0,096 W/m.k

1,1 MPa

Composition to be determined

Density

Thermal conductivity

Compressive strength at 90 days

Terracotta tile on hemp concrete floorWooden floor on hemp concrete

Hemp floors on wooden boards

Page 24: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 24

4.5 Roof Insulation

Water Lime putty Boon

+

+

=200 L Hemp concrete

40 à 50 L 22 kg 200 L Mortar to be determined 110 kg/m3

Density 220 kg/m3

Thermal conductivity λ = 0,06 W/m.k

Hemp shivesAir lime

Page 25: HEMP CONCRETE

Hemp concrete

Alexandre GACOIN 25

Thanks for your attention

[email protected]