Differential Thermal Analysis

The carbonation process in lime mortar is influenced by the diffusion of carbon dioxide into the mortar pore system, by the kinetics of the lime carbonation reaction, and by the drying and wetting process in the mortar. All these phenomena depend on the presence of water in the mortar. Water is present in liquid form as well as vapour. Physical models and their mathematical basis are given for the factors influencing carbonation. The mathematical description of the carbonation process in lime mortar completes the information necessary to model the simulation of carbonation in conjunction with the drying process. Simulations at different carbon dioxide concentrations showed a good correlation between experiment and mathematical prediction.ResumeOn donne un aperçu général des différents facteurs qui influencent la carbonatation du mortier à la chaux. On démontre que le contenu d'eau dans le matériau influence la carbonatation aussi bien par un changement de la diffusivité à travers le matériau que par un changement de la réaction entre le gaz carbonique et la chaux. Un modèle mathématique a été développé qui permet la simulation du processus de la carbonatation en tenant compte de l'évolution de séchage du matériau dans son environnement. Des simulations avec des concentrations de gaz carbonique différentes montrent une bonne corrélation entre les expériences et les prédictions mathématiques.

Modelling of lime mortar carbonation

Review(s) of: Ceramic petrography: The interpretation of archaeological pottery and related artefacts in thin section ceramic petrography, by Quinn, P.S. 2013, Oxford, Archaeopress, i+254 pp. ISBN 978-1-905739-59-2 (paperback), Price 35.00 pounds.

Ceramic petrography: The interpretation of archaeological pottery and related artefacts in thin section ceramic petrography [Book Review]

Revamping the traditional air lime mortar using the natural polymer – Areca nut for restoration application

Mitigation Strategies for Autogenous Shrinkage Cracking.

Interaction of a viscous biopolymer from cactus extract with cement paste to produce sustainable concrete

Many successful and long lasting structures that contain lime mortars are hydraulic in nature. Organic admixtures are added to lime mortar mix to modify their fresh and hardened state properties. The present work proposes plant extract as bio-admixture for repair mortar towards the protection of heritage structures. The effect of cactus extract on the properties of hydraulic lime mortar is studied. Mortar´s composition is selected with respect to the composition of historic mortars and modern restoration practice. Cactus extract was added to the lime sand mixture with varying concentrations (25%, 50%, 75%, and 100%) and with different fermentation periods of 0, 1, and 2 days The consistency and workability of modified mortar, mechanical behavior, water absorption, porosity, and water/salt absorption through capillary rise, salt crystallization have been studied. Micro structural properties of the resulting mortar have been evaluated by XRD and FT-IR to identify their mineralogical composition and ...

Characterization of Hydraulic Lime Mortar Containing Opuntia ficus-indica as a Bio-Admixture for Restoration Applications

This research work aims at studying the influence of fermented organic additive on strength and carbonation of air lime mortar for the conservation of heritage structures. Binder to aggregate ratio...

Influence of organic additive on carbonation of air lime mortar – changes in mechanical and mineralogical characteristics

Conservation of ancient buildings to make them long lasting is gaining importance. Lime mortars, which exhibit better strength and durability with progression over time, are used for this p...

Thirumalini Selvaraj

Papers

Revamping the traditional air lime mortar using the natural polymer – Areca nut for restoration application

Interaction of a viscous biopolymer from cactus extract with cement paste to produce sustainable concrete

Characterization of Hydraulic Lime Mortar Containing Opuntia ficus-indica as a Bio-Admixture for Restoration Applications

Influence of organic additive on carbonation of air lime mortar – changes in mechanical and mineralogical characteristics

Alternative Approach for Traditional Slaking and Grinding of Air Lime Mortar for Restoration of Heritage Structures: Natural Polymer