A method for repairing cracked concrete (8) using expansive mortar (13) comprising the steps of installing a saw cut (10) next to an open shrinkage crack (8) and opening the saw cut (10) with expansive mortar (13) to create a wider saw cut (11) and shift half the saw cut (10) toward the open shrinkage crack (8) to close the shrinkage crack (12) tightly. Install a rigid spacer (16) to maintain the width of the control joint. Install adhesive (18) from the top of finished concrete slab (9) into the closed shrinkage crack (12). The surface of the finished concrete slab (9) will receive cosmetic repair (7) to the closed shrinkage crack (12) and let dry before applying sealer. Other embodiments are described as shown.
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