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Effect of a micro-copolymer addition on the thermal conductivity of fly ash mortars



Alejandro Duran-Herrera, Joana K. Campos-Dimas, P Valdez, Dale P. Bentz


In this study, a copolymer composed of hollow spherical particles with an average particle size of 90 µm was evaluated as a lightweight aggregate in Portland cement-fly ash mortars to improve the thermal conductivity (k) of the composite. Mortars were produced for three different water/binder ratios by mass (w/b), 0.4, 0.5 and 0.6. Optimized proportions were obtained for a minimum target compressive strength of 35 kgf/cm2 according to the requirements of Mexican standards for non-structural masonry units. Thermal conductivity was determined for dry and saturated samples through the transient plane technique with average results of 0.16 W/(m∙K) and 0.31 W/(m∙K) respectively, that in each case represent an increment of 23 % and a reduction of 33 % in comparison to an efficient Portland cement-based commercially available thermal insulator.
Journal of Building Physics


Thermal conductivity, fly ash, micro co-polymer, mortars.


Duran-Herrera, A. , Campos-Dimas, J. , Valdez, P. and Bentz, D. (2015), Effect of a micro-copolymer addition on the thermal conductivity of fly ash mortars, Journal of Building Physics, [online],, (Accessed May 30, 2024)


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Created November 4, 2015, Updated October 12, 2021