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Environmental Technology Verification Report: Grouts for Wastewater Collection Systems, Avanti International AV-118 Acrylic Chemical Grout
Citation:
Center for Innovative Grouting Materials and Technology (CIGMAT), RTI International, AND NSF International. Environmental Technology Verification Report: Grouts for Wastewater Collection Systems, Avanti International AV-118 Acrylic Chemical Grout. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-12/584, 2014.
Impact/Purpose:
The U.S. Environmental Protection Agency (EPA), through its Office of Research and Development, funded and managed the research described herein under Task Order 61, Field Verification of Drinking Water and Wastewater Systems Assessment and Rehabilitation Technologies, of Contract No. EP-C-05-060, with RTI International (RTI). The testing was performed by the Center for Innovative Grouting Materials and Technology (CIGMAT); NSF International (NSF) provided quality assurance and other technical support. This document has been reviewed by RTI, NSF, and EPA and is recommended for public release.
Description:
Municipalities are discovering rapid degradation of infrastructures in wastewater collection and treatment facilities due to the infiltration of water from the surrounding environments. Wastewater facilities are not only wet, but also experience hydrostatic pressure conditions under normal service. Rehabilitation of these facilities by in situ methods, including use of grouting, is used to return structures to their original working conditions. Grouting is the most widely used leak-control method in small to large wastewater treatment plants and other collection systems. Application of grouts to leaking joints is considered a challenge, and performance must be evaluated using model tests representing close to actual field conditions. The grouted soil must also be durable enough to withstand the effect of severe physical and chemical environmental conditions to which it will be subjected to during the service life. This verification evaluated Avanti International’s AV-118 Duriflex Acrylic Chemical Grout under laboratory conditions at the Center for Innovative Grouting Materials and Technology (CIGMAT) Laboratories at the University of Houston. Testing was conducted on grout and grouted sand over a period of 6 months to evaluate the grout’s performance under various simulated physical and chemical environments. Grout was characterized based on viscosity, setting time, unit weight, and leaching of organics in water by performing a series of tests. The grouted sand behavior was characterized based on the unit weight, water absorption, shrinkage, permeability, compressive strength, wet-dry cycle, and chemical resistance tests. A total of 33 grouted sand tests were performed. The compressive strength of grouted sand was determined up to 28 days of curing time. Also, the changes in length, diameter, volume, and weight of the grouted sand were studied up to 10 wet-dry cycles. A total of 48 grout and grouted sand tests were performed over the 6-month evaluation.