ACI PRC-364.5-21 PDF Download

The ACI PRC-364.5-21 standard highlights the significance of the modulus of elasticity as a property of surface repair materials. The standard emphasizes that the modulus of elasticity plays a crucial role in determining the suitability and effectiveness of these materials for various repair applications.

According to the standard, when it comes to structural repairs, the modulus of elasticity of the repair materials should closely match that of the substrate concrete. This ensures that the repaired area has similar structural behavior and can effectively share the load with the surrounding concrete. On the other hand, for nonstructural repairs, a lower modulus of elasticity may be beneficial. A lower modulus allows for greater flexibility and reduced stresses between the repair material and the substrate, which can be advantageous in situations where the repaired area is subjected to movement or differential settlement.