Diatomaceous earth as a functional additive

Improved freeze-thaw resistance, strength and durability of concrete products

→ 1 Fossilized diatoms Figure: IAB Weimar gGmbH
→ 1 Fossilized diatoms
Figure: IAB Weimar gGmbH
→ 2 Substitution of up to 10 % of CEM I 42.5 R by CFA and diatomite
→ 2 Substitution of up to 10 % of CEM I 42.5 R by CFA and diatomite
→ 3 Surface scaling after 56 freeze-thaw cycles
→ 3 Surface scaling after 56 freeze-thaw cycles

Concrete needs to exhibit a high freeze-thaw resistance to ensure long service lives, particularly in the case of concrete products used in road construction. This characteristic is primarily achieved by adding a suitable air void system (using surfactants or hollow microspheres).

A research project was initiated to investigate the application potential of natural and calcined diatomaceous earth as a concrete additive. Diatomaceous earth is also referred to as diatomite, kieselgur, natural/amorphous silica, or moler earth. This porous lightweight mineral based on silicon dioxide (SiO2) is...

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BFT 02/2016

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BFT 02/2016

Ressort:  PANEL 5 | PODIUM 5
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