168体育

Source: CBMA

Date: September 11, 2014 Prof Horst-Michael Ludwig from Bauhaus-Universitat Weimar visited China Building Materials Academy (“CBMA”) at the invitation of Yao Yan, Deputy Chairman of CNBM and President of CBMA on the afternoon of 5 September 2014. Prof Horst-Michael Ludwig was hired as visiting professor at CBMA and gave a splendid report of “CO2-reduced cements for sustainable concrete”. The report is mainly involved with the following three aspects: firstly approach of emission reduction of CO2 in cement production: apply the optimized cement process technologies, such as calcination technology, grinding technology etc. adopt secondary fuels (the emission factor of high quality biomass fuels is 0) to replace fossil fuels and increase the consumption of supplementary cementitious materials, such as slag, limestone or coal ash etc. Secondly the challenges in application of supplementary cementitious materials: it mainly describes the advantages & challenges of blast furnace slag, coal ash and calcined clay used as the supplementary cementitious materials and also explains the process technologies of modification of blast furnace slag and calcined clay as high activity cementitious materials. Thirdly the substitutes for cementitious materials: 1) conventional substitutes for cementitious materials: belite-calcium sulphoaluminate cement, alkali-activated materials, supersulfated cement (high content of slag) and belite cement. 2) new substitutes for cementitious materials: CSH-based cementitious materials, that is, Ca-Si- cementitious materials (transform CSH crystals into active cementitious materials), apply raw materials to produce α-C2SH after being autoclaved and obtain the high active materials after annealing and M-S-H cementitious materials (MgO-based). Prof H.M. Ludwig was born in Weimar Germany in 1962. He was respectively awarded Master and PhD of Building Materials of School of Architecture and School of Civil Engineering of Bauhaus-Universitat Weimar in 1989 and 1996, and his doctoral dissertation won “Premixed Concrete Award”. He served as the science assistant at School of Architecture and School of Civil Engineering of Bauhaus-Universitat Weimar from 1989 to 1996; after graduation as a PhD in 1996, he was employed by a German cement enterprise - Schwenk Zement KG to work on laboratory management of cement concrete and served as director of R&D center of above enterprise from 2001 to 2008; after that he worked as the director at Heidelberg Cement R&D and Innovation Center from 2008 to 2009 and meanwhile taught at School of Architecture and Civil Engineering of Hochschule Würzburg-Schweinfurt, University of Applied Sciences; he has been the W3 Professor at Department of Building Materials of Bauhaus-Universitat Weimar and director of Building Materials Scientific Institute of Bauhaus-Universitat Weimar from October 2009 to now. Bauhaus-Universitat Weimar was established in 1919 and is the cradle of the modern design in the world. It comprises of 4 major schools: School of City & Architecture, School of Civil Engineering, School of Art & Design and School of Media. Among 4 schools, School of Civil Engineering was founded in 1953 to include the Department of Building Materials Engineering – the first specialty of building materials established in Germany and it focuses on the research on durability of concrete. After more than 60 years, School of Civil Engineering has won high honor and reputation in academy and research in the field of cement concrete in Germany.