Heavy wooden vertical constructions insulated by straw bales

Young Scientist 2015

Influence of using straw bales insulation material on architectural form of the object

Ing. arch. Miloslav KováčProf. Ing. arch. Peter Pásztor, PhD.

Content

- Types of straw bale insulated constructions

- Specification of Physical and constructional schedule

- Heavy vertical constructions

- Architectural review

Light vertical constructions

Ladder/ truss system I-beam system LPVC2

One component system L VTwo by four system

Standard system Individual system

Light system PVC1 Heavy system PVC2

Heavy vertical constructionsPrefabricated vertical constructions

-SoftwareTherm 6.2- Exterior temperature θe Košice -13°C- Interior temperature θi +20°C

- Software Teplo 2010- Boundary conditions STN 73 0540-3 except straw

- Influence of closed cavity- Influence of thermal bridge

-SoftwareTherm 6.2- Exterior temperature θe Košice -13°C- Interior temperature θi +20°C

- Software Teplo 2010- Boundary conditions STN 73 0540-3 except straw

- Influence of closed cavity- Influence of thermal bridge

-SoftwareTherm 6.2- Exterior temperature θe Košice -13°C- Interior temperature θi +20°C

- Software Teplo 2010- Boundary conditions STN 73 0540-3 except straw

- Influence of closed cavity- Influence of thermal bridge

-SoftwareTherm 6.2- Exterior temperature θe Košice -13°C- Interior temperature θi +20°C

- Software Teplo 2010- Boundary conditions STN 73 0540-3 except straw

- Influence of closed cavity- Influence of thermal bridge

- Moisture content effect included- Convection and radiation effect decrease insulation properties 20-50%- Heavy constructions about 20%J.E.Christian (1998), Andersen (2004), Grmela (2012), Atkinson (2008)

Ther

mal

tran

smitt

ance

Cons

truc

tiona

l con

clus

ions

Foundation / plan engineering1. Light I-beam con. 2. Light con. 3. Heavy con. 4. Prefabricated con.

Roof shape/ overhang engineering1. Straw/ thatch 2. Earth/ earth 3. Wood/ wood 4. Prefabricated combination

Window opening details1. Interior opening design 2.Solar house windows shaping

Interior/ exterior façade design1. Revealed construction 2.Openings and niches in insulation layer

- Shape free disposition plan

- Revealed construction

Ove

rall

Arch

itect

ural

con

clus

ions

- Large/ free shape openings

- Revealed construction architectural value (natural trunks)- Better U value compared to similar compositions of others systems. Higher about 0,02 W/m2.K- Possibility of creating niches/built-in furniture

- Demand for anchoring straw bales

- Point load pressure adjusted in foundations

- Demand for additional construction – cladding/ ventilated facade

Thank you

for your

attention