Title:
Selecting Durable Repair Materials: Performance Criteria Laboratory Results
Author(s):
Randall W. Poston, Keith Kesner, James E. McDonald, Alexander M. Vaysburd, and Peter H. Emmons
Publication:
Concrete International
Volume:
22
Issue:
11
Appears on pages(s):
21-29
Keywords:
DOI:
Date:
11/1/2000
Abstract:
This article is the second in a series of papers reporting on the investigation to develop performance criteria for cement-based repair materials. In Phase I of the study, preliminary criteria for dimensionally compatible repair materials and experimental program for its evaluation were developed based on a review of the literature and present state-of-the-art knowledge. This review concentrated on identifying pertinent material properties, appropriate test methods, and demonstrated field performance. Laboratory and field tests to evaluate the preliminary performance criteria were conducted in Phase II of the project. Twelve candidate repair materials were selected for the research of the project. Each material was subjected to a series of standard and nonstandard laboratory tests to determine properties thath were perceived to be of interest in a repair context and to provide some basic information about their behavior. These tests included: unrestrained and restrained drying shrinkage, modulus of elasticity, tensile and compressive creep, coefficient of thermal expansion, and flexural, compressive, and direct tensile strengths. Concurrent field tests were also conducted to evaluate material durability. Results of the laboratory investigation are described herein.