Research Areas

Geotechnical

Geotechnical Engineering group at UNH offer a variety of geotech related courses and research areas from field to laboratory testing and from numerical to physical modeling. Exceptional equipment and facilities provide a unique opportunities fro learning and research for undergraduate and graduate students. Read More.

 
 

Materials

Civil Engineering Materials research at UNH focuses on asphalt and portland cement concrete pavements, specifically with material characterization and testing in the laboratory.  The Materials group performs work with recycled materials, including reclaimed asphalt pavement (RAP), recycled asphalt shingles (RAS) and recycled portland cement concrete.  These include laboratory performance evaluation as well as performance of pavements in service. Read More.

 

Structures

 

 

 

 

Hydrology and Water Resources Engineering

The Hydrology and Water Resources Engineering group focuses efforts on field monitoring of systems and their representation in numerical and/or spatial models.  Ongoing research includes:  stormwater management, remote sensing, adaptation to climate change, and stream restoration, to name a few.

 

 

Coming Up

28 October 2013, 12:10-1 PM, Kings S145

 

Rapid bridge deck replacement with full width crowned transverse slabs

Presenter: Anabelle Allen
Advisor: Dr. Charlie Goodspeed

Bio: Anabelle is in her second year of her Master’s degree with a focus in structures. She received her undergraduate degree here at the University of New Hampshire in 2012. During her 4 years of undergraduate work she was heavily involved with the UNH Steel Bridge Team and the UNH chapter of ASCE. 

Abstract: 

It’s no secret that the current infrastructure in this country is rapidly reaching and passing its design life. A huge percentage of that infrastructure is bridges.  In New Hampshire there are about 140 “red-listed” bridges meaning that they are either structurally deficient or functionally obsolete… in other words, they need to be replaced. As this list grows faster than bridges can be replaced the need for a speedy and economical method to replace them intensifies. 

A bridge replacement can be anything from a full tear down and rebuild to just replacing the concrete deck. In the case that the steel girders are still in good shape, a deck replacement is a more economical option. With using full width crowned transverse slabs to replace the deck the construction process can either be done segmentally or in one long weekend. These slabs will be pre-cast, pre-stressed, and post-tensioned together, eliminating the need for cast in place concrete.

The research involved with these full width crowned transverse slabs involves everything from casting the slab to trucking it to the construction site safely without inducing cracking. Full width bridge decks can have a length of about 35ft up to almost 80ft making handling and transporting them challenging.  Recommended methods for lifting and trucking slabs become obsolete when the lengths of the slabs become so large.  This research will explore new methods for handling and transporting these long slabs. Analysis of these methods will be done using finite element models of various lengths of slabs. 

 

 

Exploring Comparative Performance of Full-Scale, Deep-Bed Anthracite and GAC Biofilters for Simultaneous Removal of Organic Precursors and Manganese

Presenter: Ransom Horner-Richardson

Advisor: Dr. Robin Collins

Bio: Ransom Horner-Richardson completed his Bachelors of Science in Civil Engineering in May 2012 at the University of New Hampshire. His interest in environmental engineering topics and drinking water treatment in particular, has led him to pursue his Masters degree in the field of Environmental Engineering.  

Abstract: 

Manchester Water-Works Drinking Water Treatment Plant (MWTP) in Manchester, NH operates eight deep bed biofilters following intermediate ozonation for organic precursor removal. Four of the beds use Granular Activated Carbon (GAC) as the filter media and four use crushed anthracite. In the summer months, manganese is prevalent in the source water for MWTP with levels up to 0.25 mg/l. The plant operates the biofilters during these Mn spikes at an elevated pH (8.0) to improve the filter performance for Mn while reducing performance for organic precursors.

This study proposes to assess each deep-bed filter media for differences and similarities in operation and removals for organics and manganese and answer the following questions:

1)      What is the comparative performance of each media type (GAC and anthracite) as a biological growth media for organic precursor (TOC, DOC, BDOC, UV absorbance, SUVA) removal over selected filter cycles (and in particular after filter cleaning) and with regard to filter depth and temperature?

2)      What is the comparative performance of each media type (GAC and anthracite) as a biological manganese (Mn) removal media over selected filter cycles (and in particular after filter cleaning) and with regard to filter depth and temperature?

3)      What is the rate limiting nutrient (RLN) for the biofilters e.g., carbon, nitrogen, phosphorus?

4)      What is the comparative performance of the filters for competing filtration removal goals i.e., organic precursor removals vs. Mn removals, with regard to temperature fluctuation, pH fluctuation, and filter media type?

Each filter type will be assessed over a year cycle to determine the effects of temperature, media type and filter depth on these competing removal goals.

Ransom with Sampling Apparatus in GAC Filter Bed

 


Spring 2013 Schedule

 

Date

Time Slot

Name

Advisor

1st or 2nd seminar

Location

Sept 9

12:10-12:35

 

 

 

 

12:35-1:00

 

 

 

Sept 16

12:10-12:35

Carter Terry

Goodspeed

1st

King

S145

12:35-1:00

 

 

 

Sept 23

12:10-12:35

 

 

 

 

12:35-1:00

 

 

 

Sept 30

12:10-12:35

 

 

 

 

12:35-1:00

 

 

 

Oct 7

12:10-12:35

 

 

 

 

12:35-1:00

 

 

 

Oct 14

12:10-12:35

Shokoufeh Zargar Shoushtari

Medina

1st

King

S145

12:35-1:00

 

 

 

Oct 21

12:10-12:35

 

 

 

 

12:35-1:00

 

 

 

Oct 28

12:10-12:35

Annabelle Allen

Goodspeed

1st

King

S145

12:35-1:00

Ransom Horner-Richardson

Collins

2nd

Nov 4

12:10-12:35

Ben Rollins

Kinner

1st

Gregg 320

12:35-1:00

 

 

 

Nov 12*

12:10-12:35

Kyle Wyatt

Fu

1st

King

S145

12:35-1:00

Zack Scanlon

Gress

2nd

Nov 18

12:10-12:35

Ashton Congalton

Daniel

1st

King

S145

12:35-1:00

Harrison Roakes

Malley

1st

Nov 25

12:10-12:35

Heidi Borchers

Ballestero

2nd

Gregg

320

12:35-1:00

Megan McCowan

Collins

1st

Dec 2

12:10-12:35

Annabelle Allen

Goodspeed

2nd

King

S145

12:35-1:00

Charlie Watkins

Kinner

2nd