Identification of Techniques to Meet pH Standards During In-Stream Construction

The main purpose of this research is to provide guidance to SHA for routine maintenance of culverts requiring grout paving and to assist SHA in meeting Maryland's water quality standard for pH. The primary objectives of this research are as follows: 

1. identify the magnitude of the anticipated fluctuation in water pH during in-stream grout paving through field and laboratory observations

2. identify suitable procedures/techniques (such as use of use of anti-washout admixtures) during the paving process to limit pH spikes above the allowable limit

3. test possible remedial actions for the high pH effluent trapped in the work area and/or generated by first flushes.

Index Terms: Environmental impacts, pH value, concrete construction, water quality, streams, concrete structures

Start date: May 18, 2011
End date: May 31, 2012
Status: Active
Contract/Grant Number: SP109B4D
Total: $144,068
Source Organization: Maryland Department of Transportation

Sponsoring Organizations:
Maryland State Highway Administration
707 North Calvert Street
Baltimore, MD 21202

Morgan State University
National Center for Transportation Management, Research and Development
Montebello D-206
1700 East Cold Spring Lane
Baltimore, MD 21251

Performing Organization:
Morgan State University
National Center for Transportation Management, Research and Development
Montebello D-206
1700 East Cold Spring Lane
Baltimore, MD 21251

Principal Investigators:
Mark Bundy
E-mail: mark.bundy@morgan.edu

James G. Hunter
E-mail: james.hunter@morgan.edu
Phone: 443-885-4733

Project Managers:
Hua Xiang
E-mail: hxiang@sha.state.md.us
Phone: 410-545-2953

Cheryl Jordon
E-mail: CJordon@sha.state.md.us

Subjects: Highways, construction