... affect the resilient modulus. Sealed specimens were exposed to 5, 10, and 20 sets of freeze–thaw cycles. Resilient modulus tests were conducted according to NCHRP 1-28A after the final freeze–thaw cycle. Freeze–thaw cycling caused a decrease in the stiffness (i.e., the summary resilient modulus) of RAP...

... The state of practice in designing pavements in the United States is primarily based on empirical or simple mechanistic-empirical procedures. Even though a number of state and federal highway agencies perform resilient modulus tests, only few incorporate the results in the pavement design...

... The current AASHTO protocol for determination of resilient modulus of soils and aggregate material (T307-99) is based largely on Long Term Pavement Performance (LTPP) Protocol P46. The LTPP protocol evolved over a number of years and has had numerous contributors (including significant guidance...

... Through the work of the Strategic Highway Research Program (SHRP, 1987–1992) and the Federal Highway Administration (FHWA, 1992-present), the government has provided financial and technical assistance to develop and improve a laboratory test method to determine the resilient modulus properties...

... modulus testing. This effort is documented in report FHWA RD-96-176, “ Resilient Modulus of Unbound Materials (LTPP Protocol P46) Laboratory Startup and Quality Control Procedure ” (Alavi, et al. 1997). Since issuance of that report, a great deal of experience has been gathered in using the procedure...

... Resilient modulus (M R ) variations with water content were carefully examined for three subgrade soils—lean clay, clayey sand, and clayey gravel. For each soil type, four M R tests were performed at the following water contents: 2 to 3% dry of optimum, at optimum; 2 to 3% wet of optimum...

... concerns about the long-term stability of these test sections. The objective of this study was to identify the effects of moisture content and pore water pressure on the resilient modulus (M r ) of unsaturated and saturated cohesive soils. Test results conducted on unsaturated cohesive soils at three...

... Many agencies still use empirical correlations developed to determine design subgrade resilient modulus based on California Bearing Ratio (CBR), R-Value or Soil Support Value (SSV) for pavement design projects. These relationships do not consider the stress dependency of the laboratory...

... Knowledge of the resilient modulus (M R ) of the sub-grade soils and materials that compose the layers of road pavements is mandatory for an efficient analysis of their structural behavior as a whole. However, laboratory determination of M R requires employment of relatively sophisticated...

... to determine optimum parameters to be used in repeated-loading triaxial tests, and (ii) analysis of the influence of fiber on the resilient modulus of the clayey soil, according to the Brazilian Standard DNER-ME 131/94. The laboratory testing data support that: (i) the mechanical response of the composite...

...-46. Currently the triaxial apparatus is being use to investigate the resilient response and permanent deformation performance of typical California aggregate base and subbases. resilient modulus triaxial testing servo-hydraulic system motion controller testing equipment Manuel O...

... The resilient modulus test is commonly used to determine the modulus of base or subgrade materials as well as to establish their nonlinear behavior. Since the resilient modulus test is time consuming, the number of tests performed for a given project is limited. For day-to-day operation...

... loading and loading sequence) on resilient modulus. A conventional triaxial setup, used by most geotechnical laboratories, was adapted for the testing of 100-mm-diameter and 200-mm-high specimens. The material response under a sinusoidal variation of load was compared with the AASHTO procedure on larger...

... reduction routines for the accurate measurement of resilient modulus properties of unbound materials using external instrumentation configuration. This concern is briefly addressed in the American Association of State Highway and Transportation Officials (AASHTO) test method T307-99, under paragraph 8.3.2.1...

... A comparison is made between resilient moduli obtained from (i) a conventional small-scale resilient modulus test, (ii) a large-scale model experiment (LSME), and (iii) a falling weight deflectometer (FWD) in the field. The LSME is a large prototype-scale test simulating a pavement section...

... Resilient modulus is a key data element for characterizing unbound pavement materials within the LTPP program. Although the test has been around for nearly three decades, its implementation within the program has been a challenge. A suitable test protocol was not available when the program began...

... Much resilient modulus research work has been completed recently, mostly as part of the Long Term Pavement Performance (LTPP) study. This work has led towards the adoption of the resilient modulus test procedure, T307-99, in the current release of the American Association of State Highway...

... This paper presents an application of the continuous intrusion miniature cone penetration testing in evaluating the resilient modulus of cohesive soils. Four cohesive soils were selected for the field and laboratory testing program. The field tests were performed on these soils using...

... The objective of this study was to investigate the applicability of the cone penetration test to determine the resilient modulus of coarse-grained materials. Field and laboratory investigations were conducted at the sites of two pavement projects in Louisiana. Field tests consisted of continuous...

... Resilient modulus is an important material property required for characterization of pavement layers for use in modern mechanistic pavement design. The resilient modulus can be determined in the laboratory using various types of tests, which measure a material's response under simulated field...