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Webe.all concrete shall be minimum 4,000 psi compressive strength. f.design shall conform to astm c858 - specifications for "underground precast concrete ... m.all joints shall be made watertight using 2 rings of butyl rubber joint mastic. n.all valves shall be open right - clockwise, except no. 16. detailalternate in concrete sidewalk section ... WebJun 1, 2024 · ASTM C990, “Standard Specification for Joints for Concrete Pipe, Manholes, and Precast Box Sections Using Preformed Flexible Joint Sealants,” outlines performance and physical property requirements of both butyl- and bitumen-based preformed flexible joint sealants. ... Mastic is oil-based and applied with a trowel. It can dry out over time ... WebA joint occurs where two components meet and may occur within an element of construction or at part of an interface between two elements. Joint sealing facilitates construction, as a number of components made of different materials are used. Joints allow for needed movement of the materials but must remain water, air, heat, cold and vapor … nbe is fragmented industry