The Impact of Sika Grout Addition on Grounting Mortar Toward Concrete Reinforcemet Stickness with Copper Slag as Comentitous. The aim of this research is toidentity the impact of Sika Grout addition on grouting mortar toward concrete rainforcement stickness show that (1) the addition Sika Grount 215 in grouting mortar can improve the reinforcement stickness (2) the use of 100% Sika Grount 215 in grouting mortar produces maximum stickness (3) the stickness of 100% Sika Grount 215 has 12.800 kg stronger (2 8% of improvement) than those of using copper slag reinforcement (without grouting) as 12.450 kg (4) the use of less than 100% Sika Grount produces less sticknes of no-grouting reinforcement and (5) there is similar slip characteristic betwen concrete reincerforment added with grouting and without grouting as 2 5 mm on outer paert of the mortar.