ASTM C990-09 (R2019) PDF Download

ASTM C990-09 (R2019) is a standard specification that covers joints for precast concrete pipe, manholes, and precast box sections using preformed flexible joint sealants. This standard is applicable to storm sewers and culverts that are not designed to operate under internal pressure or have infiltration or exfiltration limits. The purpose of the joint material used in horizontal applications is to prevent the flow of solids through the joint.

The specification provides guidelines for the acceptable pipe joint and sealant based on the results of physical tests. It specifies that bitumen sealants should be produced from asphalts, hydrocarbon resins, and plasticizing compounds, while butyl rubber sealants should be produced from blends of butyl rubber and refined hydrocarbon resins. These sealants should contain no solvents and should be reinforced with inert mineral filler.

The joint design consists of a bell or groove on one end of the section and a spigot or tongue on the adjacent end of the joining section. The standard also includes different test methods for determining the composition and physical properties of bitumen or butyl sealants.

Additionally, the specification mentions that precast concrete manhole sections and other vertical structures, which may be subject to internal or external pressure, can also be covered by this standard. However, the joints in these vertical structures are primarily intended to prevent the flow of solids or fluids.

It is important to note that this specification covers only the material and performance of the joint and sealant. The infiltration and exfiltration quantities of installed sections depend on factors other than the joints, which should be addressed by other specifications and suitable testing of the installed pipeline.