Environmental Engineering Reference
In-Depth Information
•
Clay bricks:
to decrease weight, enhance mechanical properties and decrease
heat conductivity, agricultural waste is now used in masonry composites. For
crude earth bricks, improved properties are obtained from the reinforcement of
the clay-based materials; for classical fired bricks, the use of organic substances
creates porous materials from the degradation of these fillers [57].
•
Cementitious materials:
the concrete industry faces huge energy issues and the
use of natural fibres could be one option to improve the life-cycle performance
of cementitious materials. Lignocellulosic fibres are used as reinforcement, cre-
ating two different problems: the relative incompatibility between the matrix
and these natural fillers; and the influence of these organic and hydrophilic
materials on the water transfer during the drying [58].
6.5 Conclusion
The world of biomaterials has been defined in this chapter from the point of view
of technical feasibility. However, it can only be fully apprehended through a deep
knowledge across numerous disciplines including agronomy, chemistry, bio-
chemistry, economy, sociology, medicine, engineering and ecology. Moreover,
the development of these biomaterials will depend not only on technical aspects,
but also on political decisions and trends. The determination of industrialised
societies to progress is expected to be the main driver for the promotion of eco-
logically friendly materials.
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