Identification of techniques to meet pH standard during in-stream construction.

Hunter Jr., James G.; Kang, Dong Hee; Bundy, Mark M.

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Identification of techniques to meet pH standard during in-stream construction.

2014-03-01
By Hunter Jr., James G. ; Kang, Dong Hee ; Bundy, Mark M.

File Language:

English

Details

Creators:

Hunter Jr., James G. ; Kang, Dong Hee ; Bundy, Mark M.
Corporate Creators:

Morgan State University
Corporate Contributors:

United States. Dept. of Transportation. Research and Innovative Technology Administration
Subject/TRT Terms:
Publication/ Report Number:

MD-14-SP109B4D
Resource Type:

Tech Report
Geographical Coverage:

Maryland
Corporate Publisher:

Maryland. State Highway Administration. Office of Policy & Research ; Morgan State University. National Transportation Center
Abstract:

Many of Maryland’s tributaries traverse highway infrastructure via culverts that are managed ; and maintained by SHA. These culverts are often made of galvanized steel and over time are ; subjected to scour. Concrete grout is often used as a repair material when these issues are ; identified. However, once water is allowed to inundate the freshly paved culvert, the grout ; surface can produce a dissolution effect in which elevated pH can impact downstream waters. ; The occurrence of this pH spike from grout has been reported in past projects, and has resulted ; in concerns as the pH of water may reach above the regulatory limit of 8.5. The goal of this ; project was to ensure that SHA has a proper specification and remedial actions for addressing ; the pH concern. The overall objectives of this research were to (1) review the current ; specification for using grout for culvert maintenance, (2) determine the various parameters that ; control pH spikes for effluent waters, (3) determine applicable remedial applications, and (4) ; revise the current specification and provide a guidance document/tool for SHA and contractors. ; Laboratory and field studies were used to investigate and test these objectives.
Format:

PDF
Funding:

SP109B4D
Download URL:

https://rosap.ntl.bts.gov/view/dot/27157/dot_27157_DS1.pdf
File Type:

[PDF - 9.04 MB]
Collection(s):

University Transportation Centers ; US Transportation Collection
Main Document Checksum:

urn:sha256:642d532128fbb245a93648679ab99d6233ef14a254b4b1f9fe65bc9bac555c42

File Language:

English

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