Spray Applied Pipe Liners

Ohio LTAP Center / Ohio Depart

#9133729

Wednesday, October 11, 2017
8 a.m. - 9:30 a.m. EDT

CM | 1.50

Add to My Log

Overview

         Structural Testing and Modeling Analysis of Geopolymer Pipe-lining

         This session reviews a geopolymer mortar system that has been used in the U.S. since 2011 for trenchless rehabilitation

         of storm and wastewater conveyance infrastructure. The system is spray cast either by rotary nozzle or via traditional

         shotcrete delivery systems placed inside the existing structures to create a new structure. This rehabilitation process does

         not depend on the residual structural capacity of the existing structure, but utilizes it as a "mold". This session will report

         observations made during laboratory testing of thirty-seven (37) geopolymer-mortar lined RCP, CMP and cardboard tube

         specimens which were subjected to D-load testing. Various liner thicknesses, pipe diameters and ovalities were

         evaluated. The measured test data was compared with predictions made using published engineering models.

         Structural Polyurethane and the Rehabilitation of Pipes

         Since 1990, with the introduction of structural polyurethane linings and foam to the market portfolio, these technologies

         have conquered infrastructure stabilization challenges. The impact of these technologies mitigates or eliminates the

         constant issues that plague the industry: degradation caused by corrosion. The technologies were developed to

         complement emerging technologies using ANSI and ASTM standards that could rehabilitate  an already corroded

         structure, provide significant strength, provide an extended lifetime, a fast-curative technology and a fast return to

         service when compared with other technologies. These other technologies are often semi-rigid polyurethanes, polyureas

         and epoxies that do not provide the structural integrity, short curative time and high build capacity necessary to

         structurally rehabilitate and prevent further corrosion. The advantages of structural polyurethane allow for an economic

         and ergonomic technology that can reinforce, repair, prevent and reduce the costs that will ultimately occur without the

         use of these technologies.

         Structural Performance of Engineered Concrete Liners

         This presentation will present a proposed design methodology for arriving at the minimum wall thickness required to

         produce what the engineering community has requested of this type of liner; a standalone soil-structure interaction

         system that ignores the host structure's presence in the ground going forward. Given the current state of the stresses

         within the existing soil-structure interaction system, specially engineered fine aggregate concrete liners have the ability

         to provide engineers with very efficient structures when correctly coupled with the surrounding soil's current and future

         performance capabilities. It is therefore important that the surrounding soil's performance potential be properly

         incorporated into the design process; a design step that, at present, is not always being adhered to by the engineering

         community. The proposed design methodology is one that has seen much use over the past 4.5 years in a variety of pipe

         shapes and sizes, applications, and non-standard installation conditions; and through these experiences, has been

         refined to address the gamut of the types of installations that occur and what the design methodology must capable of

         accommodating. For a true in-situ replacement, the design of a "new fine aggregate concrete pipe" must account for a

         wide range of site-specific variables to properly calculate the best wall thickness for each application. An abbreviated

         look at the engineering required to properly formulate and validate these liner systems is provided to illustrate that one

         must reach beyond performing ASTM materials testing standards that support a particular product's strong points while

         failing to implement an objective, qualifications-based testing program (QBTP) that validates a liner's future in-situ

         performance. Also reviewed are the application method(s) used in the subject liner's installation process incorporated

         into this QBTP to insure that the design will be done with the "as-applied" engineering properties.

         Supplemental Specification 833 Calculations for the Resin Based Liner

         This presentation focuses on the PolySpray FS-250, a resin based lining system and how it should be utilized with the

         Supplemental Specification 833. The objective of the presentation is to help better understand the calculations as they

         apply to the resin based system and how they differ from a cement based system.

Speakers

Joseph Royer

Invited Speaker

PhD, Development Manager at Milliken Infrastructure Solutions Read More

Peter Blais

Invited Speaker

President at HydraTech Engineered Products, LLC

Chip Johnson

Invited Speaker

Director of Technical Services, SprayRoq

Ed Kampbell

Invited Speaker

President, Rehabilitation Resource Solutions

Contact Info

Jerry Garrison, Jerry.Garrison@dot.ohio.gov