Djvu Popov L.n Laboratornye Ispytaniia Stroitelnykh Materialov M.: Vysshaia Shkola 1984 168 S -

Search for "Popov L.N." or the Russian title "Лабораторные испытания строительных материалов" . It is frequently mirrored here in both DJVU and PDF formats.

This is one of the most reliable sources for Soviet-era technical textbooks. You can search for the specific 1984 edition in their Building Materials section. Note that a free registration is usually required to download. Search for "Popov L

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