UNIVERSITY OF KASSEL

Raising the quality of calcium silicate units with simultaneous reduction of production costs using Statistical Design of Experiments (DoE)

All authors

Fundamental investigations were carried out to optimise the production process for calcium silicate units with the aim of saving costs and energy. The statistical design of experiments (DoE) approach was employed because of the large number of possible variations, and a mathematical model was set up. This model can be used to predict the brick compressive strength.

1 Introduction

Calcium silicate units are masonry blocks formed from burnt lime and silicate raw materials that are autoclaved in an atmosphere of high-pressure steam at approx. 200°C and 16 bar. The autoclaving process results in the formation of calcium silicate hydrate phases (CSH phases), which are responsible for the necessary compressive strength. The autoclaving process defines the setting reactions of the calcium silicate units and accelerates the formation of the CSH phases [1]. This process is a very energy- and cost-intensive factor for the manufacturing industry. Optimally...

TEXT M. Sc. Tim Schade¹, University Prof. Dr. rer. nat. Bernhard Middendorf²,
Dr.-Ing. Wolfgang Eden³, Prof. Dr. rer. nat. habil. Sonja Kuhnt⁴, M. Sc. Eva-Christina Becker-Emden⁴

¹University of Kassel, Kassel/Germany²Correspondence author, University of Kassel, Kassel/Germany³Research Association Lime-Sand eV, Hanover/Germany ⁴Dortmund University of Applied Sciences, Dortmund/Germany

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