Thermo-mechanical performance of concrete with alternative binder material. AbstractPurpose -This paper investigates the effect of changes to fundamental components of concrete; cement type, water/cement ratio, aggregate size & age, on thermo-mechanical properties.Understanding the heat transfer properties of construction materials will enable a reduction in energy expenditure and associated CO 2 emissions, contributing to a more sustainable built environment.Design/methodology/approach -Concrete specimens were subject to steady state heat transfer test methods to determine thermal conductivity and specific heat values. Pore volume of specimens was determined using water displacement method and compressive strength of specimens was tested according to procedures identified BS EN 12390 -3 (2009).Findings -Cement type CEM I produced the lowest thermal conductivity values by a maximum of 30%, with the cement type group CEM I corresponding to higher pore volumes and lower densities than cement type group CEM II. Specific heat was higher in cement types containing CEM II compared to cement type group CEM I, with cement type being the dominant factor determining specific heat out of cement type, w/c ratio and aggregate size. W/c ratio 0.55 provided the lowest thermal conductivity values of the w/c ratio specimens, however w/c ratio had no impact on the specific heat capacity of concrete. Cement type is found to be the most dominant component of concrete of the properties tested.Originality/value -This paper presents knowledge of the thermal performance of concrete with easily achieved changes to concrete mix design, which can be used alone or combined for maximum effect, and their impact on compressive strength. Steady state heat transfer techniques in a low moisture environment, provides originality to the study of the behaviour of cement replacements as previous research has been based on transient techniques. The use of steady state heat transfer experimentation allows important thermal properties, thermal conductivity and specific heat to be calculated.
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