Application of fly ash and expanded clay in lightweight SCC concrete

1. Dragica Jevtić, Serbia
2. Aleksandar Savić, Serbia
3. Gordana Broćeta, Republic of Srpska, Bosnia and Herzegovina

The results of experimental tests, conducted on self-compacting concrete (SCC) made with lightweight aggregate (expanded clay) and fly ash, are presented in this paper. Three series of samples were made, with the constant quantity of cement (mc = 550 kg/m3), and different contents of fly ash (40% to 65% relative to the weight of cement). Expanded clay was separated into two fractions (0/5 and 5/10 mm). Two types of chemical admixtures were used: superplasticizer and viscosity modifier. Partial replacement of expanded clay with river stone aggregate (0/4 mm) was done in experimental series. Test results showed that SCC concrete with light aggregate have all properties of self-compactibility and bulk density lower than 1650 kg/m3. The present composites showed a satisfactory compressive strength (app. 30 MPa) and durability proven by both water permeability, and combined frost and salt resistance tests.

Ključne rečitestttt :

Tematska oblast: SIMPOZIJUM A - Nauka materije, kondenzovane materije i fizika čvrstog stanja

Datum: 16.06.2015.

Contemporary Materials 2015 - Savremeni Materijali

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