Alkali-Silica Reaction (ASR) is a chemical reaction which occurs when the alkali hydroxides present in the pore solution of concrete react with certain forms of reactive silica present in the aggregates to form an alkali silica gel. This gel itself is harmless, but in presence of moisture it swells and generates tensile stresses in the concrete, eventually causing the concrete to crack. The main source of alkalis (sodium and potassium) in fresh concrete is Portland cement.

The standard dosage of XPERT ASR RESISTENT depends on alkali content of the cement use add 0.55 gallons of XPERT ASR RESISTENT for every pound (4.6 liters of ASR RESISTENT for every kilo gram) of sodium equivalent supplied by the cement dosages should be determent by performance testing. To maintain the water to cement ratio, subtract 0.85 gallon of water for each gallon (0.85 liter of water for each liter) of XPERT ASR RESISTENT added.