Research Activities: 1998

Feasibility Study: Concrete Roughness Measuring Device



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Sequential Number


Identification Number


Matching Research Agency

Center for Infrastructure Engineering Studies

Principal Investigator

Norbert Maerz, Assistant Professor
Rock Mechanics
University of Missouri -- Rolla
214-A Rock Mechanics
Rolla, MO 65409
p(573) 341-6714
f(573) 341-4368

Student Involvement


Project Objective

To demonstrate the feasibility of using image processing techniques for measuring concrete roughness.

Project Abstract

A feasibility study was conducted to determine the best way to measure the roughness of prepared concerted surfaces. Concrete pads were poured and the surfaces were roughened by various lengths of exposure to sandblasting. Three techniques were investigated: shadow profilometry, laser striping, and texture mapping. The most promising technique found that during laboratory testing was laser striping with a minimum of ten stripes required to characterize a surface. The study determined the type and alignment of laser, camera, and interference filter required for the task. Imaging software was specially developed for this task.

Task Description

Develop the software to demonstrate the concept.

Anticipated Benefits

Will lead to surface preparation techniques and protocols to improve the bonding characteristic of FRP.

Modal Orientation



Project Start Date:07/01/1998
Project End Date:06/30/1999

Relationship to other Research/Projects


Technology Transfer Activities


Transportation Research Board Keywords

Concrete roughness, image analysis, laser, striping, and surface preparation