TECHNISCHE UNIVERSITÄT BERLIN

Accelerating cement hydration
with C-S-H seeds

The acceleration of cement hydration through synthetic C-S-H shows great potential in increasing the early strength of cementitious systems. The selection of a suitable calcium-to-silicon ratio and optimized synthesis conditions results in a significant strength gain compared to non-optimized systems. Polymers may contribute during synthesis to stabilizing the C-S-H aggregates, thus enhancing the storage stability of the suspensions.

1 Introduction

According to the European climate and energy policy, the emission of greenhouse gases is to be reduced by 40 % by 2030 compared to 1990 [1]. The German cement industry contributes essentially to the issue with annual emissions of 17450 million t CO2 (2015). Nevertheless, their 1995 self-imposed climate goal of a 28 % reduction of energy conditioned CO2 emissions was achieved in 2012 [2]. The application of alternative fuels, together with more effective kilns and improved clinker mineralogy contributed to the achievement of climate goals just as well as the development of...

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