Resilient Modulus of Unbound Aggregate Base Courses
Keywords: Resilient Modulus, Summary Resilient Modulus, Quartzite, Basalt, Bandia Limestone, Unbound Aggregates 1 Introduction Achieving a proper modulus for an unbound base course is important for pavement performance [1] One com monly used parameter to define material stiffness is the Resilient Modulus (Mr), which is similar to Young’ssoil resilient modulusTable 3 is used to find the roadbed soil resilient modulus values for aggregate surfaced road (41) D Elastic Modulus of A g g r egate SubBase Layer (E S B) and A g g r egate Base Layer (E B S) in P S I For materials subjected to significant permanent deformation under loads, elastic modulus is a fundamental property thatresilient modulus of limestone aggregate a comprehensive evaluation of resilient modulus (Mr) database(s) for local conditions To this end, Mr data and other routine properties (gradation, LA Abrasion loss, standard Proctor, and unconfined compressive strength (UCS)) of 105 samples of two different types of aggregate (limestone and sandstone) were analyzed in this studyREGRESSION MODELING OF RESILIENT MODULUS OF
Resilient Modulus of Compacted Crushed Stone
Resilient modulus of aggregate bases is an important parameter in the mechanistic models The main goal of this study was to establish a simple and efficient means of predicting the resilient modulus of different types of Kentucky crushed stone aggregate bases The effect of wetting/drying and freezing/thawing on the resilient modulus values of Meridian limestone aggregate stabilized with cementkilndust is investigated Freezing/thawing is found more detrimental than wetting/drying at low deviator stressesDurability Effects on Resilient Moduli of Stabilized Resilient modulus tests were conducted on aggregate base courses collected from locations within Senegal and the United States of America (USA): Bakel Black Quartzite (GNB), Bakel Red Quartzite (GRB), Diack Basalt (BAS), Bandia Limestone (BAN), Bargny Limestone (BAR), Minnesota Class 5, Texas Recycled Asphalt Pavement (Texas RAP) and Colorado Effect of Matric Suction on Resilient Modulus of
Resilient Modulus Development of Aggregate Base and
In this study, the stiffness of unbound aggregate bases containing recycled materials will be examined using FWD field test data and laboratory resilient modulus tests 11 Background In the area of pavement recycling, fulldepth reclamation is a technique in which the existing pavement surface course along with a portion of the aggregate base are Resilient modulus (RM) The RM is one of the most important properties of asphalt mixtures, basic parameter as regards pavements designs Three specimens of each mixture were produced by Marshall and Superpave mix designs in accord with ASTM D4123 – 82 and DNIT ME135/2010 standards The specimens were left 2 h in 25 °C temperatureEvaluation of limestone crushed dust aggregates in hot In order to precisely estimate the resilient modulus for Canadian unbound aggregate, a preliminary analysis was performed to identify the adequate constitutive law to use for the model development The Uzan model, the Kθ model and a linear model were considered The preliminary results suggested that the linear model allowed obtaining the best predictive capacity This model was also used in the study of Bilodeau (2009) and Doucet and Doré (2004) The linear model Resilient Modulus Estimation for Granular Materials
(PDF) Analysis of Resilient Modulus of Dense and Open
The results of analyses of laboratory resilient modulus testing conducted on densegraded and opengraded aggregates are presented The testing program included three different aggregate materials soil resilient modulusTable 3 is used to find the roadbed soil resilient modulus values for aggregate surfaced road (41) D Elastic Modulus of A g g r egate SubBase Layer (E S B) and A g g r egate Base Layer (E B S) in P S I For materials subjected to significant permanent deformation under loads, elastic modulus is a fundamental property thatresilient modulus of limestone aggregate Resilient modulus of aggregate bases is an important parameter in the mechanistic models The main goal of this study The compacted specimens were 6 inches in diameter and 12 inches in height Crushed limestone base materials included Dense Graded Aggregate (DGA), and Crushed Stone Base (CSB) Number 57s, crushedKENTUCKY TRANSPORTATION CENTER
"Resilient Modulus of Compacted Crushed Stone
Furthermore, the resilient modulus can be predicted, using the UKTC resilient modulus model, when the stress condition and type of Kentucky base aggregate are known Multiple regression analysis is used to obtain model coefficients, k1, k2, and k3, of the relationships between resilient modulus and confining and deviator stresses used in the For the Bandia limestone, the SRM at Wopt– 2% is 81% higher than SRM at Wopt and 126% higher than SRM at Wopt+ 2% Results show also that the Resilient Modulus increases around 25% when relative density increases from 77% to 119% and the variation is more significant at Resilient Modulus of Unbound Aggregate Base Courses Resilient modulus of aggregate bases is an important parameter in the mechanistic models The main goal of this study was to establish a simple and efficient means of predicting the resilient modulus of different types of Kentucky crushed stone aggregate bases To accomplish this purpose, resilient modulus tests were performed on several Resilient Modulus of Compacted Crushed Stone
Aggregate Physical Properties Affecting Modulus and
Three aggregate types, crushed limestone, crushed dolomite, and uncrushed gravel, were tested in the laboratory for resilient modulus (M R) and permanent deformation characteristics at different factorial combinations of selected aggregate physical properties Aggregate properties studied included particle shape and surface texture, type and Resilient Modulus of Unbound Aggregate Base Courses from Senegal (West Africa) materials compacted at their optimum moisture contents and at 98% of the maximum dry unit weight for the GRB, GNB and the basalt, 95% of the maximum dry unit weight for the limestoneTop PDF Influences of Moisture Content on Resilient The resilient modulus constitutive equation adopted by NCHRP Project 137A was selected for this study Comprehensive statistical analysis was performed to develop correlations between basic soil properties and the resilient modulus model parameters : k: i The analysis did not yield good results when the whole test database wasDetermination of Typical Resilient Modulus Values for
Resilient Modulus Estimation for Granular Materials
resilient modulus determination is complex and the necessary equipment costly, the use of precise and adapted estimation methods is suitable for the implementation of mechanisticempirical pavement design This research objective is to develop an estimation model for the resilient modulus of typical Canadian granular materialsThe study characterized the water characteristic curves and resilient modulus versus matric suction relationships of aggregate base courses that were compacted at different water contents and (PDF) Effect of Matric Suction on Resilient Modulus of Resilient modulus of aggregate bases is an important parameter in the mechanistic models The main goal of this study The compacted specimens were 6 inches in diameter and 12 inches in height Crushed limestone base materials included Dense Graded Aggregate (DGA), and Crushed Stone Base (CSB) Number 57s, crushedKENTUCKY TRANSPORTATION CENTER
Resilient Modulus of Unbound Aggregate Base Courses
For the Bandia limestone, the SRM at Wopt– 2% is 81% higher than SRM at Wopt and 126% higher than SRM at Wopt+ 2% Results show also that the Resilient Modulus increases around 25% when relative density increases from 77% to 119% and the variation is more significant at The effect of wetting/drying and freezing/thawing on the resilient modulus values of Meridian limestone aggregate stabilized with cementkilndust is investigated Freezing/thawing is found more detrimental than wetting/drying at low deviator stressesDurability Effects on Resilient Moduli of Stabilized T307, Determining the Resilient Modulus of Soil and Aggregate Materials (1) During testing, an axial stress is applied for 01 second followed by a 09 second rest period Load and rest period together constitutes 1 loading cycle Note: The T307 procedure requires aggregate particlesResilient Modulus Buchanan Vulcan Innovations
Resilient Modulus Estimation for Granular Materials
resilient modulus determination is complex and the necessary equipment costly, the use of precise and adapted estimation methods is suitable for the implementation of mechanisticempirical pavement design This research objective is to develop an estimation model for the resilient modulus of typical Canadian granular materials Relationship of Resilient Modulus and Number of Stress Repetitions, Gravel, SG2 78 Variation in Resilient Modulus and Poisson's Ratio with Number of Stress Repetitions Dry Crushed Aggregate 79 Resilient Modulus (MR) as a Function ofResilient Moduli of Flexible Pavement MaterialsResilient Modulus of Compacted Crushed Stone ROSA P Nov 7, 2007 Specifiion Limit Gradations of Crushed Stone Base Aggregates 69 Appendix E Values of Testing Stresses and Resilient Modulus Recorded During Testing of Specimens of Number 57s Crushed Limestone As Received From the Producer and Compacted At Different Relative Densities get priceelastic modulus limits for crushed limestone
Determination of Typical Resilient Modulus Values for
The resilient modulus constitutive equation adopted by NCHRP Project 137A was selected for this study Comprehensive statistical analysis was performed to develop correlations between basic soil properties and the resilient modulus model parameters : k: i The analysis did not yield good results when the whole test database was Natural aggregate/RCA RAP Minimum number of resilient modulus tests Minimum number of CBR tests Minimum number of repeated load triaxial tests Natural aggregate A, F, W — 3 3 2 RCA — 1 1 — Blends of natural aggregates with RAPs 4×3∗ 3×3×4˚36 3×3×4˚36 7 Blends of RCA with RAPs 4×3∗ 3×4˚12 3×4˚12 — Total 52 52 9Development of a Correlation between the Resilient 367 International Journal of Transportation Engineering, Vol5/ No4/ Spring 2018 Effects of Aggregate Gradation on Resilient Modulus and CBR in Unbound GranularEffects of Aggregate Gradation on Resilient Modulus and
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