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).
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