Field Verification of Laboratory Resilient Modulus Measurements on Subgrade Soils

1997 ◽  
Vol 1577 (1) ◽  
pp. 53-61 ◽  
Author(s):  
W. Virgil Ping ◽  
Ling Ge
Keyword(s):  
Resilient Modulus ◽  
Input Parameter ◽  
Field Performance ◽  
Load Test ◽  
Engineering Properties ◽  
Experimental Program ◽  
Plate Load Test ◽  
Analysis And Design ◽  
Field Plate ◽  
Simplified Procedure

The resilient modulus of roadbed soils is a required input parameter in pavement analysis and design. Most recent research has concentrated on the laboratory resilient modulus test and its correlations with other engineering properties determined from laboratory tests. However, little effort has been focused on calibrating the laboratory resilient modulus measurements using field performance data. The results are presented of an experimental program to evaluate the field bearing characteristics of in-service pavement subgrade layers and to conduct the laboratory resilient modulus measurements on the reconstituted soil samples simulating the field moisture and density conditions. A simplified procedure was adopted for comparing the laboratory equivalent resilient modulus values with the modulus of elasticity of the subgrade layer obtained from the field plate load test. The laboratory resilient modulus test results compared reasonably well with the field plate layer moduli.

Experimental Verification of Resilient Deformation for Granular Subgrades

1998 ◽  
Vol 1639 (1) ◽  
pp. 12-22 ◽  
Author(s):  
W. Virgil Ping ◽  
Zenghai Yang
Keyword(s):  
Moisture Content ◽  
Laboratory Test ◽  
Resilient Modulus ◽  
Soil Samples ◽  
Load Test ◽  
Experimental Program ◽  
Rigid Plate ◽  
Plate Load Test ◽  
Reconstituted Soil ◽  
Moisture Conditions

Results of an experimental program utilizing the repetitive rigid plate load test in a test-pit facility and the laboratory resilient modulus test are presented for five typical subgrades in Florida. The subgrade materials were tested in the test pit under three different moisture conditions, that is, (1) optimum, (2) drained and dried, and (3) soaked. Laboratory resilient modulus tests were conducted on reconstituted soil samples simulating the various moisture conditions. The resilient modulus was significantly affected by the moisture content of granular subgrades. A comparison between the deformations measured from the test-pit test and the deformation calculated from the laboratory test was made. It was experimentally verified that the resilient modulus resulting from the laboratory triaxial test could be used to predict the resilient deformation of pavement subgrade layers.

Evaluation of Resilient Modulus of Cemented Lime Rock Base Materials in Florida

1996 ◽  
Vol 1546 (1) ◽  
pp. 1-12
Author(s):  
W. Virgil Ping ◽  
Ling Ge
Keyword(s):  
Resilient Modulus ◽  
Load Test ◽  
Base Layer ◽  
Pavement Materials ◽  
Analysis And Design ◽  
Field Plate ◽  
Base Materials ◽  
Bearing Load ◽  
Load Tests ◽  
Applied Stresses

The resilient modulus of pavement materials is an important parameter in pavement analysis and design. In recent years the emphasis of research has primarily been concentrated on investigating the resilient modulus of subgrade materials. Information is lacking on the resilient modulus of base materials for determining the properties of pavement layers. The results of field plate bearing load tests and laboratory resilient modulus tests on lime rock base materials are presented. Correlation relationships between the field layer modulus and the laboratory resilient modulus are evaluated. Comparison of the computed resilient modulus of the base layer with the layer modulus from the plate bearing load test under identical moisture and density conditions indicated a trend of increasing laboratory resilient modulus with increasing plate load modulus. The average values of the layer modulus backcalculated from the plate bearing load tests were higher than those of the computed equivalent resilient modulus from the laboratory tests with the averaged applied stresses in the elastic range.

scholarly journals Load-Settlement Characteristics of Tropical Red Soils of Southern Nigeria

2019 ◽  
Vol 4 (8) ◽  
pp. 107-113
Author(s):  
Nkechinyere M. Nwokediuko ◽  
Okiemute Roland Ogirigbo ◽  
Iziengbe Inerhunwa
Keyword(s):  
Static Loading ◽  
Model Comparison ◽  
Vertical Displacement ◽  
Strength Properties ◽  
Fe Analysis ◽  
Load Test ◽  
Soil Conditions ◽  
Plate Load Test ◽  
Field Plate ◽  
Red Soils

This study investigated the relationship between the load-settlement curves obtained from field (in situ) plate load test under static loading conditions to those obtained from finite element (FE) analysis, for tropical red soils. Three test locations were selected within the University of Benin campus in Benin City, Nigeria. Laboratory tests were conducted on samples obtained from these three locations to obtain the index and strength properties of the soil, and these were used as input parameters for the FE analysis. The FE analysis was performed with PLAXIS 2D, using Mohr-Coulomb soil model as the constitutive model. Comparison of load-settlement curves obtained from the field plate load test with those obtained from the FE analysis showed that the FE tool was able to predict the ultimate vertical displacement for all three test locations, with good accuracy. The maximum vertical settlement obtained for Site A from the field plate load test was 8.79 mm, while that obtained from FE analysis was 9.02 mm. For Sites B and C, it was 12.77 mm vs 12.30 mm and 22.85 mm vs 22.30 mm respectively. Parametric studies were also conducted in order to evaluate the effect of variations in soil conditions on the static response of the soils. Results from the water table parametric analysis showed significant increase in vertical displacement as the soil immediately below the footing gets saturated. The results also showed that c and ϕ have significant influence on the load-settlement curves under static loading.

scholarly journals Evaluation of Reclaimed Hydrated Fly Ash as an Aggregate for Sustainable Roadway Base Material

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Mark H. Wayne ◽  
David J. White ◽  
Jayhyun Kwon ◽  
Jacek Kawalec
Keyword(s):  
Fly Ash ◽  
Resilient Modulus ◽  
Permanent Deformation ◽  
Base Material ◽  
Performance Testing ◽  
Load Test ◽  
Plate Load Test ◽  
Laboratory Test Results ◽  
Class C

This paper summarizes the findings from laboratory and field performance testing of reclaimed hydrated class C fly ash (HFA) stabilized with a triangular aperture geogrid. This phase of testing was performed on HFA laboratory specimens and field test sections. The laboratory test results provided estimates for design input values, while the field testing assessed performance characteristics including the as-constructed modulus of the subgrade reaction, the in situ resilient modulus, and permanent deformation. For the laboratory portion, all results were derived from tests conducted on specimens immediately after sample preparation and after a 7-day cure. The compressive strength of reclaimed hydrated class C fly ash increases with curing. The strength of the HFA material can be further increased when mixed with a chemical stabilizer. For this project, chemical stabilization with lime was not viable because the lime supplier was too far from both HFA source and project site. Based on cyclic plate load tests, the in situ resilient modulus of the HFA and geogrid-stabilized HFA layers were determined on site. This paper reports the findings from the laboratory and field plate load test and highlights the potential use of geogrids in the stabilization of HFA.

scholarly journals Prediction of Effects of Geogrid Reinforced Granular Fill on the Behaviour of Static Liquefaction

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
A. Hemalatha ◽  
N. Mahendran ◽  
G. Ganesh Prabhu
Keyword(s):  
Bearing Capacity ◽  
Load Test ◽  
Test Results ◽  
Plate Load Test ◽  
Large Size ◽  
Static Liquefaction ◽  
Granular Fill ◽  
Size Dimension ◽  
Subgrade Modulus ◽  
Different Thickness

The experimental investigation on the effects of granular fill and geogrid reinforced granular fill on the behaviour of the static liquefaction potential of the subsoil is reported in this study. A series of plate load test were carried out with different thickness of the granular fill, number of geogrid layers, and size/dimension of the footing. The test results were presented in terms of bearing capacity and subgrade modulus for the settlement ofδ10,δ15, andδ20. The experimental results revealed that the introduction of granular fill significantly increases the bearing capacity and effectively control the settlement behaviour of the footing. The introduction of geogrid in granular fill enhanced the Percentage of Control in Settlement and Bearing Capacity Ratio by a maximum of 328.54% and 203.41%, respectively. The introduction of geogrid in granular fill interrupts the failure zone of the granular fill and enhances the subgrade modulus of the footing by a maximum of 255.55%; in addition subgrade modulus of the footing was increased with an increase in the number of geogrid layers. Based on the test results it is suggested that the footing with large size has beneficial improvement on the reinforced granular fill.

The Performance of Styrene Butadiene Rubber on the Engineering Properties of Asphaltic Concrete AC14

2016 ◽  
Vol 700 ◽  
pp. 238-246 ◽  
Author(s):  
Dewi Sri Jayanti ◽  
Ramadhansyah Putra Jaya ◽  
Siti Aspalaili Mohamd Sharif ◽  
Norhidayah Abdul Hassan ◽  
Siti Nur Amiera Jeffry ◽  
...  
Keyword(s):  
Resilient Modulus ◽  
Asphalt Mixture ◽  
Engineering Properties ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Asphaltic Concrete ◽  
Dynamic Creep ◽  
Creep Stiffness ◽  
And Performance ◽  
Styrene Butadiene

This study investigated the effects of adding various percentages of styrene–butadiene rubber (SBR) on the engineering properties and performance of asphaltic concrete. SBR was added into the mixture at 0%, 1%, 3%, and 5% on a mass-to-mass basis. Conventional bitumen used in this study was 80/100 PEN. The performances of SBR on the asphalt mixture properties were evaluated based on Marshall Stability, abrasion loss, resilient modulus, and dynamic creep test. Results indicated an improvement in the engineering properties and performance with the addition of SBR content. For instance, stability increased by 18.8% as the SBR content increased from 0% to 5%. Dynamic creep stiffness also increased by 46.2%. Similarly, the resilient modulus was also found to increase by approximately 84.6%.

Evaluation of soil bearing capacity by plate load test

2017 ◽  
pp. 767-772
Author(s):  
Qasim Al-Obaidi ◽  
Ali Al-Shamoosi ◽  
Azad Ahmed
Keyword(s):  
Bearing Capacity ◽  
Load Test ◽  
Plate Load Test
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