A poromechanical model is developed to identify how chemical reactions of carbonation may impact the mechanical behaviour of wellbore cement in the context of CO 2 storage. The model enables evaluating pore overpressure, porosity and solid skeleton strain evolutions during the carbonation process. The major chemical reactions occurring within cement and their consequences on the volumes of diss...

Calcite pseudomorphs after ikaite (glendonite) are associated with coldwater depositional systems, including glaciomarine and deepwater settings, as dictated by the limited stability field of ikaite. Ikaite precipitation is favored by elevated alkalinity and dissolved phosphate, conditions encountered commonly in association with organic-rich marine sediments where methane oxidation is occurrin...

This report describes a novel way to generate a highly effective hydrophobic cement surface via a carbonation route using sodium stearate. Carbonation reaction was carried out at different temperatures to investigate the hydrophobicity and morphology of the calcium carbonate formed with this process. With increasing temperatures, the particles changed from irregular shapes to more uniform rod-l...

This Reference Document on best available techniques in the cement and lime industries reflects an information exchange carried out according to Article 16(2) of Council Directive 96/61/EC. The document has to be seen in the light of the preface which describes the objectives of the document and its use. This BREF document has two parts, one for the cement industry and one for the lime industry...

This Reference Document on best available techniques in the cement and lime industries reflects an information exchange carried out according to Article 16(2) of Council Directive 96/61/EC. The document has to be seen in the light of the preface which describes the objectives of the document and its use. This BREF document has two parts, one for the cement industry and one for the lime industry...

This study analyzed uniaxial compression strength over time by preparing a homogel specimen from a bio grouting material, a cement-like form produced by environment-friendly microbial reactions. Among chemical grouting methods, the most commonly used method is the Labile Waterglass method. In this study, the homogel uniaxial compressive strength of Labile Waterglass (LW) injection material and ...

This work presents a flow analysis method for direct quantitation of calcium carbonate in cement without pretreatment of the sample. The method is based on online vaporization of CO(2) gas following acidification of the sample inside a small chamber that has a flow of acceptor solution passing around it. Solubilization of the CO(2) gas into the acceptor stream changes the conductivity of the ac...

Shortwave infrared (SWIR) spectroscopy can be applied directly to analyze the mineral chemistry of raw or geologic materials. It provides diagnostic spectral characteristics of the chemical composition of minerals, information that is invaluable for the identification and quality control of such materials. The present study aims to investigate the potential of SWIR spectroscopy as an alternativ...

Introduction: Secondary minerals within Martian meteorites have been the subject of intense scrutiny in order to expand our knowledge of surface and near surface processes on Mars. The coarse grained orthopyroxene cumulate meteorite ALH84001 is of particular importance for these studies, due to its ancient age (around 4.5Ga) and the complex mineralogical and chemical zoning of its approximately...