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Title: Characterisation of hemp-line as a composite building material
Author: Hirst, Edward A. J.
Awarding Body: University of Bath
Current Institution: University of Bath
Date of Award: 2013
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Hemp-lime is a comparatively novel renewable insulation material in the construction industry. Its use was first documented in the 1980’s, however, recent increased interest and the release of popular publications has resulted in an increased need for scientific investigation into the material. The research conducted in this investigation firstly focussed on furthering the empirical characterisation of hemp-lime and its constituents with particular attention paid to minimising fabrication variables and increasing the accuracy of final specimen bulk densities. Secondly attempts were made to quantify the degree of carbon sequestration that occurs as a result of the carbonation of the lime binder. A total of 196 specimens were fabricated for the main programme of work. It has been demonstrated that the novel fabrication methodology developed and tested in this investigation allows for reliable and consistent fabrication of specimens with almost identical final bulk densities. An average intrinsic empirical variability of 0.8% was determined for hemp-lime composites. It has been shown that the values of CO2 sequestration varied between 151- 192kg/m3 for the current formulated binders and composite bulk densities being used or considered in the UK construction industry. This resulted in a minimum 100% increase above the lowest estimated sequestration value from previous investigations. Preliminary carbonation constant values for hemp-lime have been determined, however, further testing is required to establish definite values based on a wider sample of testing.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available