000002088 001__ 2088
000002088 005__ 20141118153443.0
000002088 04107 $$acze
000002088 046__ $$k2013-05-27
000002088 100__ $$aPROSKE, Tilo
000002088 24500 $$aAPPROACH FOR ECO-FRIENDLY CONCRETES WITH REDUCED WATER AND CEMENT CONTENT

000002088 24630 $$n1.$$pProceedings of the First International Conference on Concrete Sustainability
000002088 260__ $$bJapan Concrete Institute, Tokyo
000002088 506__ $$arestricted
000002088 520__ $$2eng$$aThe major environmental impact of concrete is caused by CO2-emissions during the cement production. Great potential for the reduction of the global warming potential and other environmental impacts is seen especially for concretes with normal strength. The use of superplasticizer and high reactive cements as well as the optimization of the particle size distribution and the reduction of the water content allows a significant reduction of the Portland cement clinker in the concrete. Essential is the addition of mineral fillers (e.g. limestone powder) to provide an optimal paste volume. In addition the already practicable substitution of the cement clinker by secondary raw materials like fly-ash or furnace-slag is an appropriate opportunity but limited by the availability of these resources. Preliminary investigations have shown that it is possible to decrease the conventional cement content by more than a third to less than 150 kg cement per m³ concrete, for many applications with low and medium concrete compressive strengths (20-40 N/mm²). Doing so, the powder content was to be increased in comparison with the conventional concretes by the addition of concrete additives, wherein limestone powder was initially used to ensure the desired consistency of the low-water concrete. The identification of suitable superplasticizers proved to be a particular challenge.

000002088 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000002088 653__ $$agreen concrete, limestone powder, strength development, eco-friendly concrete

000002088 7112_ $$aFirst International Conference on Concrete Sustainability$$cTokyo (JP)$$d2013-05-27 / 2013-05-29$$gICCS13
000002088 720__ $$aPROSKE, Tilo$$iGRAUBNER, Carl-Alexander$$iREZVANI, Moien$$iHAINER, Stefan
000002088 8560_ $$ffischerc@itam.cas.cz
000002088 8564_ $$s807395$$uhttp://invenio.itam.cas.cz/record/2088/files/S1-6-1.pdf$$y
             Original version of the author's contribution as presented on CD, .
            
000002088 962__ $$r2053
000002088 980__ $$aPAPER