Guide for Assessment of Concrete Structures before Rehabilitation

Abstract

The purpose of this guide is to provide general procedures for the assessment of concrete structures before rehabilitation.

Evaluation of structures other than concrete buildings is beyond the scope of this guide, although the approach for condition assessment for such structures may be similar to those outlined in this guide.

This guide is general in character and intended to provide an approach for assessment of a concrete structure to meet one or more of the objectives listed in 1.1.

The owner and licensed design professional should understand and agree on the objectives and goals of the assessment prior to the start of the assessment.

The first step in the assessment is the investigation and concludes with the evaluation, at either a preliminary or detailed level, depending upon the project requirements.

After completion of the preliminary assessment, a detailed assessment can proceed if deemed desirable or necessary.

Assessments generally involve four major tasks: 1) reviewing available pertinent documents; 2) performing field observations and condition assessments; 3) sampling and material testing; and 4) evaluation and structural analysis.

Based on results of the investigation, evaluation and analysis can be performed and the results summarized in a report.

The flowchart in Fig. 1.2 identifies the methodology and major tasks that are commonly undertaken in an assessment conducted before rehabilitation