Construction / Roofing / Bituminous / Quartz


Mineral: Quartz/ Silica


Quartz (silica, SiO2) is the core mineral within the Sibelco group and can be found in a broad number of applications, such as glass, ceramics and polymers. 

When just processed to obtain a certain granulation, but not milled nor calcined, the products are called Silica Sand M. 


Quartz can be characterised by:

  • Relatively high Mohs hardness of 7
  • Low electrical conductivity
  • Easy to wet
  • High inertness in various media
  • Shape (depending on the source, quartz particles can have an angular or more rounded shape)


Note when using quartz: depending on the particle size distribution of the product, it can be labelled (STOT RE 2 or STOT RE 1). For more detailed information, visit


Basic properties

Property Value Unit
Moisture [%]
pH 7 [-]
Hardness (Mohs) 7 [-]
Refractive index 1.55 [-]
Colour (D65/ 10°) L* 93 – 96 [-]
L.O.I. < 0.3 [%]
Density 2.65 [kg/ dm3]



Product Grade D50


Silica Sand  M31 370
M32 265
M34 170


Production locations: Dessel (BE)

Applications: Silica sand is being used in this application to reduce slippage of the top-layer. It also reflects the sunlight and therefore reduces the heating up of the surface and lowers its temperature and of the structure below.

Functionality:  Safety, Cost

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