The goal of this contribution is summary of physical - chemistry properties of usually used foundry silica and no - silica sands in Czech foundries. With the help of dilatometry analysis theoretical assumptions of influence of grain shape and size on dilatation value of sands were confirmed. Determined was the possibility of dilatometry analysis employment for preparing special (hybrid) sands with lower and/or more linear character of dilatation.
Cupák P. & Tomáš K. (2006). Exploitation of negativethermal expansion of the shale sand to decreasing of remanent strength of the mould and core mixtures with sodium silicate binders. Slévárenství. 12. 462-464.
Dahlman M. et. al. (2001). Synthetic foundry base sands brings new possibilities. Slévárenstvi. 5/6. 181 -184.
Bobrowski A. & Holtzer M. (2010). Determination of the SiO2 content in a chromite sand by the infrared spectroscopy. Archives of Foundry Engineering. 10 (2), 19-22.