Three-dimensional quantification of pore structure in coal ash-based geopolymer using conventional electron tomography

•We report the pore structure of geopolymers at the nanoscale for the first time.•The porosity is determined to be 7.15% for the volume of interest, 0.00748μm3.•Most of the pores are not connected and have irregular geometry.•The research results will contribute to understand the durability of geopo...

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