Pozzolans have been used to improve the some properties of concrete and also to reduce the cost of producing cement. Many researchers investigated pozzolanic cements, which were mostly made with kind of artificial or natural pozzolans. While the most recent investigations on pozzolan containing cements study the effect of pozzolan type, replacement amount and fineness, this study was investigat...

The use of methods based on measuring electrical conductivity to assess pozzolanic activity has recently been used primarily in aqueous suspensions of pozzolan: calcium hydroxide. However, the use of similar methods in suspensions of cement with pozzolans has not been widely studied. This paper proposes a new method for rapid assessment of the pozzolanic activity of mineral admixtures in aqueou...

Pozzolans are used as additives in stabilizing clayey soils and trass cement production. Natural unnatural pozzolans added to the ground stabilization process increase bearing strength of soil, reduce deformations that will occur a result stresses, settlements, swelling potential, liquefaction potential permeability. It Pozzolans, which called trass, heat hydration, resistance concrete against ...

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...