Title:
Comparative Analysis of Water Sorption in Mortar with Olivine Sand Captured Using 4D X-ray CT
Author(s):
Vieira
Publication:
Web Session
Volume:
ws_S24_Vieira.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
3/23/2024
Abstract:
Olivine is an abundant magnesium iron silicate mineral with chemical properties to sequester CO2. In this study, water sorption in portland cement mortar specimens made with olivine sand and specimens made with quartz sand (control) is compared. First, four-dimensional (4D) X-ray computed tomography (CT) scanning was completed for the first two weeks of curing. The curing evolution results are being characterized to discern differences in the microstructures of each specimen type. The next step is to complete 4D water sorption tests in the X-ray CT scanner (Figure 1) to develop sorption curves and link relative sorption rates to the microstructures. Subsequently, specimen replicates will be exposed to increased concentrations of CO2 to increase carbonation, which will be quantified using thermogravimetric analysis, prior to sorption tests. The results will further the understanding of material formulations designed to increase natural carbon capture, utilization, and storage in built environments.