DRAINAGE MATERIALS
942-1 Round Rubber Gaskets for Pipe Joints.
Except where O -ring type gaskets are specified for special cases and for special type pipe, round rubber gaskets for use in concrete pipe joints shall meet the requirements of ASTM C443, with the additional requirements that the gasket used shall be of such cross sectional area and perimeter as to properly fit the space provided in the pipe joint in which it is to be used. Prior to use, the gasket shall be stored in as cool a place as practicable.
942-2 Cold Adhesive Preformed Plastic Gaskets (For Sealing Elliptical Conc rete Pipe
Joints).
942-2.1 General: Cold adhesive preformed plastic gaskets shall be of a material, shape
and size so as to effect a permanent water tight seal in joints of elliptical concrete pipe. A minimum of two pieces of gasket material shall be used in each joint. The gasket material shall be protected by a 2 -piece removable wrapper. To facilitate application, the 2 -piece wrapper shall be so designed that one -half may be removed longitudinally without disturbing the other half. The size of the ga sket shall be in accordance with the manufacturer ’s recommendation for the particular joint in which it is to be used. However, the minimum size for each of the gaskets used in a joint shall be in accordance with the following: Table 942-1 Pipe Size (Inches) Nominal Gasket Size (Inches) Minimum Cross -Section (In2) Up to 19 by 30 1-1/2 1.75 19 by 30 to 53 by 83 1-3/4 2.5 Over 53 by 83 2 3.25 The above minimum size requirements are based on a joint designed with a maximum taper of 10 degrees and an in -place annular space of approximately 1/4 inch.
942-2.2 Composition: The gasket sealing the joints shall be produced from blends of
refined hydro carbon resins and plasticizing compounds reinforced with inert mineral filler. The material shall contain no solvents and shall not produce irritating fumes or obnoxious odors. The gasket shall not depend on oxidizing, evaporation or chemical action for it s adhesive or cohesive strength. The chemical composition of the gasket material shall meet the following requirements: FY 2023-24 Return to Table of Contents Table 942-2 Minimum Maximum Bitumen (petroleum plastic content) (% by weight) 50 70 Ash-Inert Mineral Matter (% by weight) 30 50 Volatile Matter (@ 325ºF) (% by weight) 2.0 The gasket joint sealing compound when immersed for 30 days at ambient room temperature separately in 5% solution of caustic potash, a mixture of 5% hydrochloric acid, a 5% solution of sulfuric acid, and a saturated hydrogen sulfide solution shall show no visible deterioration. The physical properties of the gasket joint sealing compound as shipped shall meet the following requirements: Table 942-3 Minimum Maximum Specific Gravity @ 77ºF 1.2 1.35 Ductility @ 77ºF 50 mm Softening Point @ 77ºF 320ºF Penetration (0.1 mm) 77ºF @ (150 gms) five seconds 50 120
942-2.3 Certification: The manufacturer of the gasket material shall submit to the
Engineer certified test results covering each shipment of material to each project.
942-3 Resilient Connectors for Sealing Precast Structures to Pipe Joints.
942-3.1 General: Resilient connectors shall meet the requirements of ASTM C923. The
connectors shall also be compatible with the precast structure and pipe.
942-3.2 Approved Product List ( APL): All resilient connectors shall be listed on the
Department’s Approved Product List ( APL). Manufacturers seeking evaluation of their product shall submit an application in accordance with Section 6.
942-4 Profile Rubber Gaskets for Concrete Pipe Joints.
a.Round Pipe: The gaskets shall meet the requirements of ASTM C443.
b.Elliptical Pipe: The gaskets shall meet the requirements of ASTM C443. Additionally, the gaskets used shall be of such cross sectional area and perimeter as to properly fit the space provided in the pipe joint in which it is to be used. The gaskets shall be stored in as cool a place as practicable prior to use. FY 2023-24 Return to Table of Contents SECTION 943 CORRUGATED STEEL PIPE AND PIPE ARCH (INCLUDING UNDERDRAIN)
943-1 General Requirements.
Corrugated steel pipe, including round culvert pipe, pipe arch and underdrain and coupling bands for each type shall conform to AASHTO M 36 and shall include plant certification from the National Transportation Product Evaluation Program (NTPEP .). Except for underdrain, corrugated steel pipe including pipe arch shall be fabricated with helical corrugations with a minimum of two ann ular corrugations formed on each end of each pipe to accommodate a coupling band. Annular fabrication is not permitted unless specifically called for in the Plans or Specifications. Provide, as part of the shipping ticket, the actual mean inside diameter a nd total measured lengths of each LOT of pipe shipped to the project. Include the minimum and maximum inside diameters used to calculate the actual mean inside diameter.
943-2 Round Culvert Pipe.
For round culvert pipe used as sidedrain, unless shown othe rwise in the Plans, the minimum thickness of the metal (including galvanizing - AASHTO M 218, or aluminum coating - AASHTO M 274), shall be as specified below. Alternatively, if no future maintenance concerns exist , the Contractor may propose the pipe gage based on the Department’s Drainage Manual and Culvert Service Life Estimator for approval by the Engineer . FY 2023-24 Return to Table of Contents
Source: Florida Standard Specifications for Road and Bridge Construction, 2024 Edition. Pages 1068–1069 of 1,299.