Strength properties of roller compacted concrete containing a non-standard high calcium fly ash
Özcan, Fatih | Bilim, Cahit
Although roller compacted concrete (RCC) made with and without fly ash (FA) has enjoyed numerous application of dams, roads and large floors construction in Europe, Japan, Australia and Unites States since 1970s, it has not almost yet been used at all in Turkey despite abundant and economical sources of FA and cement. This reluctance has arised due to the lack of confidence and the lack of technical experience in the concrete engineering field. In order to build, to some extend, the confidence and gain technical experience about RCC made with and without FA, a series of laboratory work was undertaken. In the present work, the RCCs were produced with three different cement quantity including 200, 300 and 400 kg/m3 normal Portland cement (NPC). A FA, which is a local material, was also used ...
The use of a non-standard high calcium fly ash in concrete and its response to accelerated curing
Bilim, Cahit | Özcan, Fatih
An experimental work was carried out to investigate the use of a non-standard high calcium fiy ash in concrete. The response of the same fly ash to the accelerated curing was also explored. With three different cementitious material contents, a total of 48 concretes were produced. The water/cement ratios were varied from 0.40 to 0.87. Compressive strengths of the moist cured cube specimens cast from the concrete mixtures made with 0%, 15%, 30% and 45% replacement of normal Portland cement with fly ash were measured at 28 days and 3 months. Accelerated compressive strengths were also measured using warm-water method and boiling-water method in accordance with the relevant ASTM and Turkish Standards. Despite the fact that the fly ash used was a non-standard, the laboratory test results showe...