Portland cement growth joints at bridge ends: Currently growth joints at bridge approach slabs are performing with mixed results. The joint is working but the joint filler material requires regular maintenance.
Portland cement concrete (PCC) pavement growth joints: Expansion (or "growth") joints have been installed in PCC pavements at various spacings to relieve expansion stresses to prevent damage to pavement and structures. The growth joints require considerable maintenance and are leading to deterioration of adjacent pavement and a considerable reduction in ride quality. These joints have not minimized the problem with blow-ups.
Research is needed to determine effectiveness of growth joints, to examine the use of approved materials in construction, establish guidelines for use of growth joints and to develop an effective growth joint design.