Construction engineering lime-hemp concrete compressive strengths flexural strength
R. Walker, S. Pavía, F. Murphy, An assessment of some physical properties of lime-hemp concrete, BCRI Bridge Infrastructure Concrete Research Ireland., University College Cork, Ní Nualláin, Walsh, West, Cannon, Caprani, McCabe, 2010, 431 - 438
This work is part of a wider research programme that aims at producing alternatives to
conventional building materials. The aim of this project is to investigate several
physical properties of a sustainable, carbon-negative, lime-hemp biocomposites which
can partially replace existing, non-biodegradable, non-sustainable, building materials
of high embodied energy and high CO2 emissions. The shrinkage, flexural and
compressive strengths of these lime-hemp concretes, made with either calcium lime or
a commercial binder with a cement content and varying lime:hemp proportions (1:9,
1:1 and 3:1), were investigated according to the relevant European standards. The
shrinkage and strength development at 7, 28 and 90 days were monitored. The
relationship between shrinkage and binder type, hemp content and water content was
observed. The development of the flexural and compressive strengths shared several
characteristics but their behaviour departed in relation to increasing hemp content with
compressive strength continuously decreasing while flexural strength varied little
between 50% and 75% hemp content.
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