789 Works

Is hemp lime concrete a mix of hemp and lime?

B. Mazhoud, M. Viel, F. Collet, A. Phelipot-Mardelé, C. Lanos & S. Prétot
Hemp lime concrete is a mix of hemp shiv glued in a mineral binder. Such concrete is characterized by low thermal conductivity and interesting hygric properties. The aims of this study realized in the frame of ISOBIO Project is to understand which is the contribution of each component of the hemp lime concrete to the thermo-hygric properties of the mix. The study focuses on the case of a commercial hemp shiv (Biofibat®, CAVAC France) and...

Multi-objective optimization of bio-based thermal insulation materials in building modeling

A. Torres, M. Palumbo, L. Jiménez, A. Naked Haddad & D. Boer
Energy efficiency in buildings is a key objective of nowadays policies. To achieve this goal, three main strategies can be implemented: modify users’ behavior, implement passive measures and implement active measures. Those strategies and the reduction of the energy consumption during the use phase imply both, an initial investment and an environmental impact. The equilibrium between them and their efficiency benefits should be evaluated in advance to any intervention. The present work implements a passive...

Multicriteria analysis of hemp particles’ impact on physical and thermo-mechanical performances of hemp concrete

C. Niyigena, S. Amziane & A. Chateauneuf
The hemp concrete is considered as an eco-material due to its environmental assets. Its constituents are mainly the hemp particles, binder and water to which admixtures are added eventually. The quality of hemp particles is very sensitive to the nature of soil where it is produced and also to its transformation process, which results in properties variability of hemp particles. And this may be a barrier to development of hemp concrete industry. The herein study...

Designing and building a children’s bamboo & hemp playground

G. Steenput
A course named “Building with Bamboo” is part of the final year curriculum of the building engineer at Avans University Tilburg, AB&I, department of architecture. Within this course students can earn 2x3 E.C. over a period 2x10 days. From September 2015 up to January 2016 the subject of the course involved the designing and building of a children’s playground made of bamboo and hemp. The playground is situated in Antwerp (Belgium) on the inner courtyard...

Industrial scale-up of bio-based insulating panel production

V. Colson, T. Le Cunff, O. Jadeau & C. Lanos
ISOBIO Project aims to produce highly insulating panels from bio-resources. This study focuses on the constrains associated to the production of panel at the industrial scale using thermal treatment. Three types of processes are considered (wet processes for rigid panels, dry processes for rigid or flexible panels and Stramit process®) and the limits of each process are identified according to the formulation characteristics (moisture content, binder type and content), binding mechanisms (melting, thermosetting or drying),...

Innovative uses of biochar as carbon sequestering building materials in wall plaster and pellets

H. W. Kua, M. S. Ng & K. Ong
Biochar has recently been explored as an alternate construction material. While it has been deployed as road construction, there is an emerging trend of using biochar as concrete admixture and other non-structural building elements. This study explores the use of biochar as a component in wall plaster and pellets that are used to fill cavities for interior non-structural wall panels. Biochar was incorporated in plastering material and the carbon dioxide adsorption capability of this material...

Bio-based plaster for improved indoor air quality

D. Maskell, C. F. Da Silva, K. Mower, C. Rana, A. Dengel, R. J. Ball, M. P. Ansell, A. Thomson, U. Peter & P. J. Walker
People in industrialised countries spend approximately 80% of their time indoors. As such, the internal environment quality can have a significant impact on occupant health and wellbeing. Additionally, the demand for increased building energy efficiency has the potential to degrade Indoor Air Quality (IAQ) through a reduction of air exchange rates. In many forms of construction, the walls and ceilings are plastered, providing a large surface area exposed to the indoor environment. There is a...

Mechanics of straw bales for building applications

T. Lecompte & A. Le Duigou
During the last decades, straw bales have seen an increasing interest for building insulation and even for the construction of small load-bearing straw houses, especially in view of the need to seek low environmental footprints. Up to present, very few studies are available concerning the mechanical behaviour of straw bales in buildings. Nowadays hybrid timber and straw methods are taking over from simple load bearing structures. There is a lack of knowledge about the mechanical...

Experimental study of lateral load resistance of unclassified timber walls

H. Wadi, S. Amziane & M. Taazount
Wood is used in many countries as a building material for low and high level constructions because this material has an excellent physical properties and environmentally friendly. Timber walls are the structural system that designed for purpose of resisting lateral loads and transmitting these forces to the foundations in a ductile behavior. According to the European Standard, the timber shear wall consists of timber frame and sheathing board connected together by fasteners. The sheathing board...

Hydrophobation of natural fibres for application in WPC materials

A. Barrio, A. Salvador, J. Hidalgo & I. Svensson
The objective of the present study was to improve the method of hydrophobation of natural fibers for its application in WPC. For outdoor applications such as in decking’s and ventilated facades improved durability against weathering is desired. This problem is associated with the water adsorption of the natural cellulosic fibres. Commercial paper sizing agents AKD was used for the optimization of surface hydrophobation of natural fibres (wood flour; Rettenmaier BK 40/90). Parameters studied included: Application...

Development of a thermocompression manufacturing process adapted to flax-epoxy laminated composites

T. Cadu, L. Van Schoors, O. Sicot, S. Moscardelli, L. Divet, E. Keita & S. Fontaine
This study focuses on the optimization of a manufacturing process adapted to flax fibers based composites in which the components are controlled. Twelve plies unidirectional composites samples were prepared by thermocompression using unidirectional flax fibers and fluid epoxyamine resin. Temperature cycle was chosen to limit fibers degradation during fabrication. Different parameters have been studied to evaluate their influence on the mechanical properties of composites. 0° tensile specimens were tested at a 1mm/min crosshead speed. Measures...

Calcium sulfate: an alternative for environmentally friendly construction

M. A. Guerra-Cossío, J. R. González-López, R. X. Magallanes-Rivera, A. A. Zaldívar-Cadena & M. Z. Figueroa-Torres
One of the challenges of the construction industry today is to develop and promote the use of environmentally friendly materials. The production and use of Portland cement clinker as a construction material is part of the problem because of its high generation of CO2 in its manufacture. Therefore, alternative materials that mitigate in some extent this situation become an important task in the development of new materials. The use of calcium sulfate in any form...

Properties of alkali activated mortars with combinations of different starting materials

B. Akturk, A. B. Kizilkanat & N. Kabay
Alkali-activated cements are rather new binders that are produced by the activation of pozzolans with different alkali solutions. The utilization of these types of materials might solve an important ecological problem in terms of the use of an industrial sub product. Among the precursor materials used, blast furnace slag (BFS) and fly ash (FA) has been prominent ones because of their favorable chemistry. Turkey is rich in natural pozzolans and has extensive deposits of pumice....

Desulphurised residues effect on the porosity and pore size distribution of cement based pastes during the early ages of curing

J. M. Khatib, L. Wright, P. S. Mangat & M. Sonebi
This research is a part of a research concerned with the use of flue gas desulphurisation waste residues in construction applications. In this paper, some results on pore size distribution of cement paste containing desulphurised waste during the early stages of hydration are reported. The desulphurised waste used was a combination of 85% fly ash and 15% gypsum (by weight) and was referred to as simulated desulphurised waste (SDW). The SDW was chosen due to...

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