Influence of Sucrose on the Morphology of Calcium Hydroxide Crystals

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Abstract

While Portland cement is the most common binder used in constructions, the use of air lime in the modernconstruction industry can still prove to be advantageous for certain applications, if some limitations – mostlyrelated to the carbonation reaction – are overcome. Morphology and size of calcium hydroxide (CH) have animportant effect on its reaction kinetics and can be modified using organic additives. This study investigatesthe effects of sucrose on the morphology of calcium hydroxide. Sucrose is added to the lime, both before andafter the slaking. Scanning electron microscopy and X-ray diffraction were used to investigate the crystalssize and morphology in modified and control samples, while microchemical analyses were carried out toinvestigate the composition of pore solutions. Results suggest that sucrose, especially if added before theslaking process, affects the characteristics of CH crystals (habit and size) as well as the chemistry of thepore solution, with possible implications on thre activity and properties of sucrose-modified lime putty and, in turn, of lime-based construction materials
Original languageEnglish
Title of host publicationYoung Researchers' Forum V
Subtitle of host publicationInnovation in Construction Materials
EditorsAgnieszka J. Klemm, Rohollah Rostami, Fernando C.R. Almeida
Place of PublicationGlasgow
PublisherGlasgow Caledonian University
Pages64-67
Number of pages4
Publication statusPublished - 22 Apr 2021
EventYoung Researchers’ Forum V: Innovation in Construction Materials - Virtual, Glasgow, United Kingdom
Duration: 22 Apr 202122 Apr 2021
https://www.gcu.ac.uk/cebe/research/yrf/

Conference

ConferenceYoung Researchers’ Forum V
CountryUnited Kingdom
CityGlasgow
Period22/04/2122/04/21
Internet address

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