Synthesis and additive manufacturing of calcium silicate hydrate scaffolds
Ezgi Oğur, Renata Botti, Mauro Bortolotti, Paolo Colombo, Cekdar Vakifahmetoglu
Abstract
A Calcium silicate hydrate (CSH) powder containing above 60 wt% xonotlite (remaining being tobermorite, scawtite and calcite) were produced from lime and ordinary recycled soda-lime glass via simple hydrothermal synthesis route. The thermogravimetric analysis demonstrated only ~20%weight loss up to 800 °C (at about the transformation temperature of CSHs to wollastonite), reaching a plateau in the 800–1200 °C temperature range. The synthesized CSH powder was employed for the fabrication of both green and heat-treated scaffolds by additive manufacturing (AM), possessing a high porosity (>80 vol%) and limited strength (~0.9 MPa).
Topics & Concepts
TobermoriteMaterials scienceCalcium silicateWollastoniteCalcium silicate hydrateLimeThermogravimetric analysisHydrateChemical engineeringHydrothermal circulationSoda limeCalcitePorosityCalciumMineralogyHydrothermal synthesisSilicateComposite materialCementMetallurgyOrganic chemistryRaw materialChemistryEngineeringConcrete and Cement Materials ResearchBone Tissue Engineering MaterialsRecycling and utilization of industrial and municipal waste in materials production