Bulk composition and microstructure dependence of effective thermal conductivity of porous inorganic polymer cements
By E. Kamseu, B. Nait‐Ali, M. Bignozzi, C. Leonelli, S. Rossignol, D. Smith. 2012
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Experimental results and theoretical models are used to assess the effective thermal conductivity of porous inorganic polymer cements, often indicated as geopolymers, with porosity between 30 and 70. vol.%. It is shown that the bulk chemical composition affects the microstructure (grains size, pores size, spatial arrangement of pores, homogeneity, micro cracks, bleeding channels) with consequently the heat flow behaviour through the porous matrix. In particular, introduction of controlled fine pores in a homogeneous matrix of inorganic polymer cements results in an increase of pore volume and improvement of the thermal insulation. The variation of the effective thermal conductivity with the total porosity was found to be consistent with analytical models described by Maxwell-Eucken and Landauer.
Subfields: Civil and Structural Engineering, Earth-Surface Processes, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/d89543994bf23e232b3061df4ce8ec3fde2637b6
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In Civil and Structural Engineering
In Earth-Surface Processes
In Materials Chemistry
Citations in the corpus
- Effect of sulphate and nitrate anions on heavy metal immobilisation in ferronickel slag geopolymers (2013, background): “…and chemical properties such as high compressive strength, low shrinkage, low permeability (10−9 cm/s), acid resistance and thermal stability up to +30 28210 69554. rights reserved. t al., Effect of sulphate and http://dx.doi.org/10.1016/j.c 1000 °C (Bakharev et al., 2003; Kamseu et al., 2012).”
- Recent progress in thermoelectric materials (2014, background): “conductivity mainly depends on their chemical compositions [135–139], thereby offering an opportunity for realizing higher ZT via tuning the power factor without heavily increasing thermal conductivity.”
- A comparison between different foaming methods for the synthesis of light weight geopolymers (2014, background): “The weight of concrete represents a large proportion of dead load on a structure; the use of geopolymers of lower density is beneficial in terms of reduced structural load-bearing with further benefits of acoustic and thermal insulation [8-10].”