Durability of mortar and concretes containing slag with low hydraulic activity

Abstract

a b s t r a c tGranulated blast furnace slag has been widely used as a partial substitute for Portland cement in many applications because of advantages which include cost reduction, reduction in heat evolution and improvement of durability properties. However, the effectiveness of slag depends on its hydraulic reactivity. In this paper, the results of an experimental study on the effect of slag with low hydraulicity on the mechanical and durability properties of concrete and the performance of mortar under sulfate attack are discussed. Special attention is given to gas permeability and water absorption of slag concrete. The durability of slag concrete is improved at long term at low Water/Binder ratio. Sulfate resistance of mortar is improved by slag replacement up to 30%.

Assessing some durability properties of sustainable lightweight oil palm shell concrete incorporating slag and manufactured sand

“…The use of ground granulated blast furnace slag (GGBS) in conventional concrete is widespread as it enhances the durability of concrete through pore refinement and has the capability for continued long term pozzolanic reaction or hydration. Researchers reported improvement of sorption properties of normal weight concrete (NWC) using high volumes of GGBS of up to 50% (Guneyisi and Gesoglu, 2008;Hadj-sadok et al, 2011;Hadjsadok et al, 2012). The use of high volume of GGBS as a cement replacement material is also beneficial in terms of environmental considerations as the reduction in cement content decreases the carbon footprint .…”

Influence of fired clay brick waste additions on the durability of mortars

“…Although the reuse potential of a variety of ceramic-related industrial wastes, namely sludges, fired clays and demolition waste, has been investigated, these had been subjected to firing temperatures up to 1100°C at some stage of their former processing [6][7][8][9][10][11] and they generally require waste collection and conditioning operations that might be rather elaborate. On the contrary, rejected low temperature fired clay bricks, straight from the production line, constitute a clean and ready to use waste material, whose effect on concrete or the durability of mortars has not been investigated.…”

Relationship Among the Permeation Rate of Water into Concrete, the Mix Design, Curing, and the Degree of Drying

“…Bradu and Florea (2014) reported that water absorption significantly increases, when the replacement ratio of fly ash with cement reaches 70%. On the other hand, blast furnace slag has less effect on the sorptivity or it can reduce it (Hadj-sadok et al 2011;Hadj-sadok et al 2012).…”