Expansive Strain Distribution and Its Estimation Methods for Expansive Concrete Applied to Full Size Slabs and Wall Rails

Abstract

For the purpose of quantifying the chemical prestress introduced by expansive concrete and demonstrating its estimation method, we verified the consistency between estimated expansive strain calculated under the assumption of constant workload and measured expansive strain using a full-scale specimen of a road bridge with full-scale slabs and wall rails on steel girders. The results confirmed that, by using the assumption of constant workload, the expansive strain and chemical prestress introduced into the structure can be quantitatively evaluated with constant accuracy, regardless of whether or not the structure is axisymmetric. This suggests that the proposed estimation method is effective as a method for grasping in advance the amount of chemical prestress that is effective for suppressing cracks in structures.