Abstract The aggregate composed of cement clinker, an intermediate product, improves strength development and mass transfer resistance concrete. Fly ash (FA) is a supplementary cementitious material that can be substituted by cement. This study investigated the highly FA-substituted mortar mixed with clinker fine (CL) tested its inhibitory effect against alkali–silica reaction (ASR). In additio...

Carbon nanotubes (CNTs) and nanofibers (CNFs) were synthesized on clinker and silica fume particles in order to create a low cost cementitious nanostructured material. The synthesis was carried out by an in situ chemical vapor deposition (CVD) process using converter dust, an industrial byproduct, as iron precursor. The use of these materials reduces the cost, with the objective of application ...

Ordinary Portland Cement (OPC) is often used for the solidification/stabilization (S/S) of waste containing heavy metals and salts. These waste components will precipitate in the form of insoluble compounds on to unreacted cement clinker grains preventing further hydration. In this study the long term effects of the presence of contaminants in solidified waste is examined by numerically simulat...

The aim of this study is to extract brownmillerite from sulfate resisting Portland cement (SRPC) in order determine its crystal chemistry and the effects dissolution protocols. Brownmillerites (C4AF) four SRPC were extracted systematically studied by X-ray diffraction (XRD), electron probe microanalysis (EPMA), fluorescence spectroscopy. Two extraction steps used. first salicylic acid/methanol ...

Abstract Excavations in 2008–2009 Hungate, York, UK, conducted by the York Archaeological Trust (now Archaeology) revealed waterlogged timbers of another building a type best known from Coppergate. This building, dating to third quarter 10th century CE , was superficially same construction as seen earlier at Coppergate, consisting rectangular pit cut into ground lined with posts that supported ...

This article deals with the intensification of grinding process in ball mills. Attention is drawn to need reduce energy input for grinding. Data on cement clinker kinetics when surface-active agents are used, as well issues by changing surface profile armor plates given.

The production of ferrite-rich calcium sulfoaluminate belite (CSABF) cement clinker, also containing MgO, from ladle slag, Fe-slag, and phosphogypsum was translated a lab-scale to pilot demonstration in 7-metre kiln at 1260 °C. An account the trials/manufacturing is presented, process robust. Laboratory tests prior scale-up showed that gehlenite formation can be inhibited CSABF clinker by addin...

Four series of experiments were carried out to study the possibility replacing clay and an iron-containing component with tefritobasalt lead slag as part initial charge for Portland cement. The at atmospheric pressure a temperature 1350 °C. It was shown that replacement in cement industry will decrease by 100 °C technological scheme production reduction energy consumption, since theoretical spe...

The main problem of cement production is to reduce energy consumption and the amount greenhouse gases CO2 emitted into atmosphere. prerequisite for solving is: use man-made waste unconventional raw materials in composition charge reduction limestone content from 85% 70-75% as a source gas. article presents results studied technogenic suitability non-traditional such tefritobazalt, coal mining w...

The incorporation of pozzolanic materials in concrete has many beneficial effects to enhance the mechanical properties of concrete. The calcium silicate hydrates in cement matrix of concrete increase by pozzolanic reaction of silicates and calcium hydroxide. The fine pozzolanic particles fill spaces between clinker grains, thereby resulting in a denser cement matrix and interfacial transition z...