METHOD OF DETERMINATION OF POROSITY OF SULFUR COMPOSITE MATERIALS Russian patent published in 2004 - IPC

FIELD: study of building composite materials lining blocks, floor plates, curb-stones, foundation blocks, plumbing pipes, drain chutes).

SUBSTANCE: proposed method includes determination of average density of material, calcination of specimen made from this material, determination of mass of specimen residue, calculation of real density of material taking into account mass of residue, real density of sulfur and filler followed by calculation of total porosity of material by its real and average densities; when use is made of thermally stable or unstable fillers, additional calcination of filler is performed simultaneously with calcination of specimen and determination of mass of residue of filler, calculation of real density ρ_real, g/cu cm is performed by the following formulae: m_f=m_res/(l-(m_w-m)/m_w), m_s=m_sp-m_f, V_w=m_w/ρ_f, v_S=m_S/ρ_S, ρ_f=m_sp/(v_f +v_s), where m_f is mass of filler, g; m_res of residue of specimen under test after calcination g; m_w is mass of weighed portion of filler, g; m is mass of residue after calcination of weighed portion of filler, g; m_s is mass of sulfur, g; m_sp is mass of said specimen, g; v_f is volume occupied by filler cu cm; v_s is volume occupied by sulfur, cu cm; ρ_s is real density of sulfur, g/cu cm; ρ_f is real density of filler, g/cu cm.

EFFECT: enhanced accuracy of determination of real density in aggressive, frost-resistant and atmosphere-resistant media.

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