This study addresses the use of alkali activated high-calcium fly ash-based binder to improve engineering characteristics of soft clay-rich soils as an alternative to common stabilisers. The physico-chemical reaction sequence has been investigated by considering the binder alone and the binder mixed with kaolin. An insight into the reactivity evidenced that calcium-containing phases derived from high-calcium fly ash represent the reactive phases and, hence, pozzolanic activity is the dominant process. New compounds are formed, thenardite Na 2 SO 4 and an amorphous silicate consisting of chains combined with calcium probably incorporating three-dimensional four-fold aluminium environments.
Use of alkali activated high-calcium fly ash binder for kaolin clay soil stabilisation: Physicochemical evolution / Coudert, E.; Paris, M.; Deneele, D.; Russo, G.; Tarantino, A.. - In: CONSTRUCTION AND BUILDING MATERIALS. - ISSN 0950-0618. - 201:(2019), pp. 539-552. [10.1016/j.conbuildmat.2018.12.188]
Use of alkali activated high-calcium fly ash binder for kaolin clay soil stabilisation: Physicochemical evolution
Russo G.;
2019
Abstract
This study addresses the use of alkali activated high-calcium fly ash-based binder to improve engineering characteristics of soft clay-rich soils as an alternative to common stabilisers. The physico-chemical reaction sequence has been investigated by considering the binder alone and the binder mixed with kaolin. An insight into the reactivity evidenced that calcium-containing phases derived from high-calcium fly ash represent the reactive phases and, hence, pozzolanic activity is the dominant process. New compounds are formed, thenardite Na 2 SO 4 and an amorphous silicate consisting of chains combined with calcium probably incorporating three-dimensional four-fold aluminium environments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
