No-fines concretes with compressive strength in the range 7-30 MPa at 28 days of curing were optimized by changing the water-cement ratio from 0.41 to 0.34 and the aggregate-cement ratio from 8 to 4. Some mixtures were also repeated with the addition of a hydrophobic admixture and prepared by fully replacing the ordinary aggregate with recycled aggregate to evaluate durability effects. High susceptibility to carbonation was observed for all the no-fines mixes studied. The use of recycled aggregate increases capillary water absorption (about 50%); however, the related decrease in durability could be easily counteracted with the use of a hydrophobic admixture.
Sustainable and Durable No-fines Concrete for Vertical Applications / Francesca, Tittarelli; Mobili, Alessandra; Giosue', Chiara; Ruello, Maria Letizia. - In: INTERNATIONAL JOURNAL OF CHEMICAL, ENVIRONMENTAL AND BIOLOGICAL SCIENCES. - ISSN 2320-4079. - STAMPA. - (2014), pp. 14-18. (Intervento presentato al convegno International Journal Conference on Humanities, Bio-Science, Chemical and Environmental Engoneering (HBCEE'2014 tenutosi a DUBAI (UAE) nel 6-7 Jan 2014).
Sustainable and Durable No-fines Concrete for Vertical Applications
MOBILI, ALESSANDRA;GIOSUE', CHIARA;RUELLO, Maria Letizia
2014-01-01
Abstract
No-fines concretes with compressive strength in the range 7-30 MPa at 28 days of curing were optimized by changing the water-cement ratio from 0.41 to 0.34 and the aggregate-cement ratio from 8 to 4. Some mixtures were also repeated with the addition of a hydrophobic admixture and prepared by fully replacing the ordinary aggregate with recycled aggregate to evaluate durability effects. High susceptibility to carbonation was observed for all the no-fines mixes studied. The use of recycled aggregate increases capillary water absorption (about 50%); however, the related decrease in durability could be easily counteracted with the use of a hydrophobic admixture.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
