Title:
Mechanistic-Empirical Strength and Modulus Relationships of Soil-Cement through Pavement’s Life
Author(s):
Leigh E. W. Ayers and Isaac L. Howard
Publication:
Materials Journal
Volume:
121
Issue:
4
Appears on pages(s):
91-104
Keywords:
accelerated aging; beam testing; compressive strength; mechanical property relationships; mechanistic-empirical; pavement; soil-cement; static modulus of elasticity
DOI:
10.14359/51740780
Date:
8/1/2024
Abstract:
In this paper, several hundred specimens were compacted and
tested to evaluate the potential of beam testing protocols to
directly measure four mechanical properties from one beam.
Mechanical properties measured through beam testing protocols
were compared to properties of plastic mold (PM) device specimens
and were found to be comparable once specimen densities
were corrected. Mechanical properties were also used to quantify
mechanical property relationships, often used as pavement design
inputs. When compared to traditionally recommended mechanical
property relationships, relationships between elastic modulus and
unconfined compressive strength, as well as modulus of rupture
and unconfined compressive strength, were overly conservative;
however, indirect tensile strength and unconfined compressive
strength relationships from the literature were accurate. This paper
also assessed an elevated-temperature curing protocol to simulate
later-life pavement mechanical properties on laboratory specimens.
Mechanical properties of laboratory specimens that underwent
accelerated curing were shown to be comparable to 10- to
54-year-old cores taken from Mississippi highways.