Protection and Curing. THE LAST SENTENCE IS CHANGED TO: Ensure vehicles and other loads are not placed on sidewalks, islands, and driveways until the concrete has attained compressive strength of 3000 pounds per square inch, as determined from 2 concrete cylinders field cured according to AASHTO T 23. THE FOLLOWING SUBSECTION IS ADDED:
Protection and Curing. In accordance with the requirements of Section 202.10 of the DPW Standard Specifications.
Protection and Curing a. The Contractor shall protect and cure the surface according to Section 603. For intermediate shotcrete surfaces or if a stained or finished final surface is required, the Contractor shall cure the shotcrete using an approved curing compound. If not stain or finished surface is required, apply white curing compound to the final exposed shotcrete surface according to Section 603. The Contractor shall protect and maintain shotcrete at a temperature above 40º F until shotcrete has achieved a minimum strength of 750 psi. Nebraska Department of Roads Bridge Operations, Policies & Procedures Section 5: Special Provisions Page 5.117
Protection and Curing a. The Contractor shall protect and cure the surface according to Section 603. For intermediate shotcrete surfaces or if a stained or finished final surface is required, the Contractor shall cure the shotcrete using an approved curing compound. If not stain or finished surface is required, apply white curing compound to the final exposed shotcrete surface according to Section 603. The Contractor shall protect and maintain shotcrete at a temperature above 40º F until shotcrete has achieved a minimum strength of 750 psi. Base February 2014 Bridge Division New December 0000 Xxxxxxxx Xxxxxxxxxx xx Xxxxx Xxxxxx Operations, Policies & Procedures Section 5: Special Provisions Page 5.117
