Opening of Bids - Sewer and Manhole Rehabilitation Project No 118-093 - Insituform Technologies USA LLC

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Figure i Figure 2 PUTTING CLAIMS TO THE TEST The installation of all products used in the test was performed by the manufacturers on the Louisiana Tech University campus under close monitoring by TTC personnel. Forty specimens each of Insituform Standard and Insituform Enhanced were tested. Each test specimen was installed to fit snugly inside a 1.83 m (6 ft.) long, 305 mm (12 in.) internal diameter, schedule 40 steel casing pipe. Each casing pipe was fitted with short, bolted pipe segments (clamshells) at each end. (See Figure 1). Preparing the specimens for testing involved trim- ming the ends flush with the clamshells, removing the clamshells, and cleaning the ends of the speci- mens. This resulted in the plastic pipe extending beyond the ends of the steel casing pipes. The specimens were then fitted with end seals applied externally, span- ning the casing pipe and plastic pipe. (See Figure 2). The end seals contained the water at the prescribed pressure, which was Table 1 Material Characterization Tests (Short-term) supplied between the plastic and casing pipes from a pressurized water distribution system. At least three specimens of each product were used for short-term buckling tests to determine the upper pressure limit for the long-term tests. A regulator was used to raise the pressure on the specimen, and the rate of load application was kept constant until failure occurred. For the long-term tests, each specimen was pressurized at a controlled rate of 10 psi/minute (69 kPa/minute) until a selected pressure was reached. A minimum of five pressure levels were selected for each product to cause the specimens to fail at various times over a 10,000-hour test period. Specimens were monitored at least once a day for evidence of buckling. Failures that occurred during normal work hours were monitored manually. After normal work hours, failures were detected electronically. V064 1?r1 cPed_Z r _T Numerous tests, including flexural modulus, flexural strength and tensile strength, were conducted on each product according to ASTM standards. On each of these tests, the results found that both Insituform products far surpassed the design values. (See Table f). jFiY'iCi " �'iNSi'rrtieP ASTM " ": fi�ANUFACTdREA`5. TrC TEST PriUr°ETY : '"' i'ti0bi}CT "TEST DESIGN YAtUE, rtESULTS TNGG psi (MPa) psi ma) Flexural Modulus Stan dard D790- _..W448,63 gigl�lp-_ ( ) (3090) Enhanced . D790 100,000 , � 538,620 (2760�) .. (3710) . Flexural Strength Standard D790 4,500 9,310 (31) (64) Enhanced D790 A )09 (58)