Page 19 - Demo

CONCRETE TECHNOLOGYwww.cpi-worldwide.com CPI %u2013 Concrete Plant International | India Edition %u2013 4 | 2025 19Based on preliminary tests using two types of wood biomass ash (WBA) in concrete mixes, it can be concluded that the fresh-state properties of concrete are significantly influenced by the specific type of ash. Compared to the reference mix (M0), concrete with WBA exhibited reduced consistency in both WBA mixes and reduced density solely in the M2 mix. This was in line with the markedly higher air content in the M2 mix, while the air content (as well as the density) in the M1 mix remained comparable to that of the M0 mix. After 28 days of curing, both WBA-containing mixes demonstrated compressive strengths approximately 30% lower than the reference mix. Despite the elevated water absorption of concrete with WBA, all mixes complied with the water absorption limit of 6% as specified in EN 1340:2004/AC:2007. Furthermore, all mixes passed the freeze-thaw and salt resistance tests %u2013 defined by an average peel value of 0.5 kg/m%u00b2 after 56 cycles Fig. 2: Examples of ash produced during thermal treatment: (a) fly ash from wood biomass; (b) bottom ash from wood biomass; and (c) ash derived from sludge from wastewater treatment plants.a) b) c)TRANSFORMING CONSTRUCTION TOGETHERWE MAINTAIN AND IMPROVE YOUR PRECAST FACTORYRead more: www.elematic.com www.cpi-worldwide.comCPi-NewsletterICCX-NewsletterRegisternowCONCRETE PLANTINTERNATIONALTRADE JOURNALS FOR THE CONCRETE INDUSTRYSTAY UP TO DATEAND REGISTER NOW FOR OUR NEWSLETTER!