The Effect of Superabsorbent Polymers on Mechanical Characteristics and Cracking Susceptibility of Alkali-Activated Mortars Containing Ground Granulated Blast-Furnace Slag and Copper Slag

In an attempt to increase sustainability of construction materials, both ground granulated blast-furnace slag (GGBS) and, less popular, copper (CS) can be used in alkali-activated composites. However, such composites are often more susceptible cracking, triggered by the self-desiccation processes. The addition superabsorbent polymers (SAP) may enable internal curing concrete and prevent excessive cracking. Thus, this paper aims evaluate effectiveness SAP as agent for mortars containing GGBS CS. samples were activated sodium silicate using 6.5% Na2O mass precursor. evaluation was based on analysis mechanical properties, autogenous shrinkage, water absorption capacity two types SAPs. Depending type polymer, a higher alkali concentration solutions speeds up early age reactions 7 days. After period, collapses follow at same pace reference sample. presence CS, with smaller particles well-distributed mix leads extension reactions, observed values shrinkage (AS). This results increased compressive strength GGBS-CS mortars, achieving 8.8% greater than sample (without SAP) 6 months. Although its cracking susceptibility, improve properties promote new applications sustainable material slag.