This study presents research on the effect of Portland cement (PC) replacement with metakaolin mechanical behavior flax textile-reinforced cementitious matrices (TRCM). The composition and in-situ fibres was determined using X-ray diffraction thermogravimetric analysis, while reinforcement efficiency textile TRCMs investigated by three-point bending tests finite element analysis. High amounts P...

In this study, the rheo-viscoelastic behaviors of calcium sulphoaluminate (CSA) modified Portland cement (PC) pastes were investigated. The shear stress, apparent viscosity, frequency sweep and time curves composite with different PC CSA volume fractions analyzed, minimum viscosity (?min) PC-CSA predicted. Results show that increase fractions, ?min, critical strain flow at both 5 min 60 resting...

This study compares the environmental impacts of blast furnace slag-, fly ash-, and metakaolin-based alkali-activated concretes with Portland cement (PC) using life cycle assessment methodology. The variability in production processes mix constituents across Europe uncertainty associated transportation distances are evaluated for both types concrete. recent data on soluble sodium silicates was ...

This study investigated the basic mechanical and microscopic properties of cement produced with metakaolin and quantified the production of residual white efflorescence. Cement mortar was produced at various replacement ratios of metakaolin (0, 5, 10, 15, 20, and 25% by weight of cement) and exposed to various environments. Compressive strength and efflorescence quantify (using Matrix Laborator...

Portland cement (PC) is a hydraulic binding material widely used in the building industry. The main interest in its use in dentistry is focused on a possible alternative to mineral trioxide aggregate (MTA) because PC is less expensive and is widely available. In dentistry, PC has been used in dental procedures such as pulpotomy, pulp capping, repair of root perforation and root-end filling. The...

A persistent question in industrial economics is the underpinning of the link between market concentration and price. How much of the link can be attributed to market power and how much to market efficiency? This paper develops a theoretical model to address that question. Applied to the US portland cement industry, the model indicates that both impacts matter. In relative terms, however, the m...

Abstract Spent fluorescent lamps glass (SFLG) waste, manually and mechanically processed in a waste treatment plant, was used to partially replace up 50 wt% Portland cement (PC). Both types exhibited similar pozzolanic activity. The mortars containing 35 wt% SFLG met the specifications for other materials (e.g. fly ash) and, after 90 curing days, their compressive strength values were or higher...

Pyrite cinders, which are the waste products of sulphuric acid manufacturing plants, contain hazardous heavy metals with potential environmental risks for disposal. In this study, the potential use of pyrite cinders (PyCs) as iron source in the production of Portland cement clinker was demonstrated at the industrial scale. The chemical and mineralogical analyses of the PyC sample used in this s...