The addition of pozzolans has a potentially important role in the cement industry since using waste from other industries environmental benefits, including reduced CO2 emissions production. This study evaluates pozzolanic activity glass powder three different particle sizes (150 µm, 75 and 45 upper limits) compares results with those added technical standards found literature. Pozzolanicity was...

In this paper, we discuss the presence of volcanic pozzolans in structural mortars Roman Temple Nora Sardinia (3rd c. AD), represented by pyroclastic rocks (pumices and tuffs) employed as coarse fine aggregates. The provenance these materials from Phlegraean Fields was highlighted through a multi-analytical approach, involving Polarized Light Microscopy on thin sections (PLM), Scanning Electron...

For nearly 200 years since their discovery in 1756, geologists considered the zeolite minerals to occur as fairly large crystals in the vugs and cavities of basalts and other traprock formations. Here, they were prized by mineral collectors, but their small abundance and polymineralic nature defied commercial exploitation. As the synthetic zeolite (molecular sieve) business began to take hold i...

In this paper, the effects of different aluminum to silicon ratios in silicate chains of calcium silicate hydrates (C-S-H) are evaluated on the diffusion coefficient of chloride ions by molecular dynamics method. Tobermorite is a crystalline phase that is used for studying C-S-H properties in nano scale, because of its analogous chemical composition to C-S-H. Aluminum incorporation in C-S-H and...