Steady-state and dynamic hygrothermal performance of rendered straw bale walls

2020 ◽  
pp. 1-11 ◽  
Author(s):  
Andrew Thomson ◽  
Kris Dick ◽  
Pete Walker
Keyword(s):  
Steady State ◽  
Hygrothermal Performance ◽  
Straw Bale Walls ◽  
Straw Bale

Hot box method to investigate U-values for straw bale walls with various structures

2021 ◽  
pp. 110706
Author(s):  
Liu Yang ◽  
Jingjing Yang ◽  
Yan Liu ◽  
Yungang An ◽  
Jingheng Chen
Keyword(s):  
Box Method ◽  
Straw Bale Walls ◽  
Straw Bale

scholarly journals Hygrothermal Behaviour of the Timber-Framed Sauna with Straw-Bale Walls

2018 ◽  
Author(s):  
Martti-Jaan Miljan ◽  
◽  
Rain Allikmäe ◽  
Andres Jürgenson ◽  
Matis Miljan ◽  
...  
Keyword(s):  
Straw Bale Walls ◽  
Straw Bale ◽  
Hygrothermal Behaviour

Allowable Shears for Plastered Straw-Bale Walls

2015 ◽  
Vol 141 (2) ◽  
pp. 06014008
Author(s):  
M. Aschheim ◽  
S. Jalali ◽  
C. Ash ◽  
K. Donahue ◽  
M. Hammer
Keyword(s):  
Straw Bale Walls ◽  
Straw Bale

scholarly journals Research on Prediction Model for Durability of Straw Bale Walls in Warm (Humid) Continental Climate—A Case Study in Northeast China

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3007 ◽  
Author(s):  
Xunzhi Yin ◽  
Qi Dong ◽  
Mike Lawrence ◽  
Daniel Maskell ◽  
Jiaqi Yu ◽  
...  
Keyword(s):  
Low Carbon ◽  
Isothermal Model ◽  
Hygrothermal Environment ◽  
Low Carbon Energy ◽  
Straw Bale Walls ◽  
The Impact ◽  
Straw Bale ◽  
Continental Climate

This research analyses straw degradation inside straw bale walls in the region and develops the prediction of degradation inside straw bale walls. The results show that the straw inside straw bale walls have no serious concerns of degradation in the high hygrothermal environment in the region with only moderate concerns of degradation in the area 2–3 cm deep behind the lime render. The onsite investigations indicate that the degradation isopleth model can only predict straw conditions behind the rendering layer, whereas the isothermal model fits the complete situation inside straw bale walls. This research develops the models for predicting straw degradation levels inside a straw bale building in a warm (humid) continental climate. The impact of this research will help the growth of low carbon energy efficient straw bale construction with confidence pertaining to its long-term durability characteristics both in the region and regions sharing similar climatic features globally.

scholarly journals Laboratory and In-Situ Measurements for Thermal and Acoustic Performance of Straw Bales

2019 ◽  
Vol 11 (20) ◽  
pp. 5592 ◽  
Author(s):  
Stefano Cascone ◽  
Gianpiero Evola ◽  
Antonio Gagliano ◽  
Gaetano Sciuto ◽  
Chiara Baroetto Parisi
Keyword(s):  
Thermal Conductivity ◽  
Phase Shift ◽  
In Situ Measurements ◽  
Sound Insulation ◽  
Initial Water Content ◽  
Acoustic Performance ◽  
Thermal Transmittance ◽  
Straw Bale Walls ◽  
Straw Bale

This paper investigates the performance of timber-framed walls insulated with straw bales, and compares them with similar walls containing expanded polystyrene (EPS) instead of straw bales. First, thermal conductivity, initial water content, and density of the straw bales were experimentally measured in a laboratory set-up, and the dependence of the thermal conductivity of the dry material on temperature was described. Then, the two insulation solutions were compared by looking at their steady and periodic thermal transmittance, decrement factor, phase shift, internal areal heat capacity and surface mass. Finally, the acoustic performance of both wall typologies was analyzed by means of in situ measurements in two-story buildings built in Southern Italy. The weighted apparent sound reduction index for the partition wall between two houses and the weighted standardized level difference for the façades were assessed based on ISO Standard 16283. The results indicate that the dry straw bales have an average thermal conductivity of k = 0.0573 W/(m·K), and their density is around 80 kg/m3. In addition, straw bale walls have good steady thermal performance, but they still lack sufficient thermal inertia, as witnessed by the low phase shift and the high periodic thermal transmittance. Finally, according to the on-site measurements, the results underline that the acoustic performance of the straw bale walls is far better than the walls adopting traditional EPS insulation. Overall, the straw bales investigated are a promising natural and sustainable solution for thermal and sound insulation of buildings.

scholarly journals AIR TIGHTNESS OF STRAW BALE CONSTRUCTION

2015 ◽  
Vol 10 (1) ◽  
pp. 99-113 ◽  
Author(s):  
Larisa Brojan ◽  
Ben Weil ◽  
Peggi L. Clouston
Keyword(s):  
Air Flow ◽  
Grade System ◽  
Grading System ◽  
Air Tightness ◽  
Straw Bale Walls ◽  
Straw Bale ◽  
Building Methods

Straw bale construction offers a renewable, sustainable and proven alternative to mainstream building methods; still, little is known about its airflow characteristics. To this end, the intent of this paper is to evaluate airtightness of fully constructed and plastered straw bale walls as well as individual plain straw bales. The first experiment entailed measuring the influence of straw bale orientation on airflow characteristics with the finding that straw bale considered alone has poor air flow-retarding characteristics and that plaster is the primary air barrier. A second experiment involved thirty plastered straw bale specimens using three different plaster types. From this experiment, a crack grading system was developed and is herein proposed as a tool to evaluate plaster performance as an air barrier. A third experiment validated the crack grade system through application on four fully constructed straw bale walls. Practical use of the crack grading system was demonstrated on a case study straw bale house in Radomlje, Slovenia, where the predicted air tightness results were validated through comparison to results of blower door tests.

scholarly journals Physical Properties of Straw Bales as a Construction Material: A Review

2019 ◽  
Vol 11 (12) ◽  
pp. 3388 ◽  
Author(s):  
Stefano Cascone ◽  
Renata Rapisarda ◽  
Dario Cascone
Keyword(s):  
Thermal Resistance ◽  
Environmental Sustainability ◽  
Quantitative Assessment ◽  
Building Materials ◽  
Construction Material ◽  
Acoustic Properties ◽  
Acoustic Insulation ◽  
The World ◽  
Straw Bale Walls ◽  
Straw Bale

Straw bale buildings provide significant benefits in terms of costs, human health, and environmental sustainability. Several studies in different regions have underlined the remarkable properties of straw bales as insulating and construction material; however, to the authors’ knowledge, there are no reviews published on this topic. The main objective of this paper is to provide a better understanding of straw bale systems, focusing on durability and thermal and acoustic insulation properties. To this end, previous tests and studies on straw bale buildings around the world were reviewed, comparing their results, assessing where research currently stands, and identifying the aspects that need to be further investigated. Results from previous tests have highlighted their ability to achieve excellent living comfort and encouraged their use. Guidelines for the characteristics to be achieved during the baling process are now required. Combining straw bale walls with a render or any type of high-density layer can improve both the thermal and acoustic properties of straw bale constructions. Finally, a quantitative assessment of the most significant properties, such as thermal resistance and acoustic insulation, is necessary to reduce the gap between straw bales and traditional building materials.

scholarly journals Hygrothermal Behaviour of the Timber-Framed Sauna with Straw-Bale Walls

2018 ◽  
Author(s):  
Martti-Jaan Miljan ◽  
◽  
Rain Allikmäe ◽  
Andres Jürgenson ◽  
Matis Miljan ◽  
...  
Keyword(s):  
Straw Bale Walls ◽  
Straw Bale ◽  
Hygrothermal Behaviour
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