LINE B-2-3 AND B-2-4 - Laserfiche WebLink

Any changes in the concrete mix shall be cause for applying the requirements of the "first 25 cubic yards." Initial curing of the cylinders may be accomplished within the pipe in lieu of the requirements of ASTM C 31. The compressive strength shall be taken as the average strength of three cylinders tested at the same age except that if one cylinder indicates low strength and shows evidence of improper molding, curing or testing, the strength value may be based on the average of two cylinders. If two acceptable cylinders are not available, the inspector may take cores in accordance with Subsection 306-4.7.5 of the reference specification The inspector shall provide, at its own expense, all equipment materials, supplies and labor for molding, curing and testing the concrete cylinders. During construction of the cast-in-place pipe, a daily inspection report will be required of the inspector to be submitted to the Engineer. The inspection report shall include: Be Trench conditions, such as, in cut or fill, % compaction, and stability of bottom and sides. b. Observed alignment and grade tolerances of pipe. Method of curing of the concrete. Notation that all pipe openings are closed, and kept closed for at least 5 days. e. Repairing of pipe in accordance with specifications. f. Location, width, and length of any cracking in the pipe. Log of test cylinders taken and truck ticket number from which samples were taken. h. Slump tests and truck ticket number from which tests were taken. Location and actual thickness of pipe at test sites for top, bottom, and 45-degrees each side of top and bottom. Location and actual thickness of any concrete cores when required. L~cation and results of any required load bearing test. 1. Certificates from the supplier of transit-mixed concrete as described herein under the "Materials" section. CDS.1.14 15-6