Developing Statistical Limits for Using the Light Weight Deflectometer (LWD) in Construction Quality Assurance

Volovski, Matthew; Arman, Mohammad Ali; Labi, Samuel

doi:10.5703/1288284315504

Cited by 4 publications

(1 citation statement)

References 22 publications

(44 reference statements)

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“…Various studies regarding these devices or test methods have been conducted focusing on conventional road embankment construction materials. These studies have explored the feasibility of LWD, SSG, and DCP in compaction quality control during the construction based on laboratory or field experiments [ 13 , 14 , 17 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ], investigated the variation of modulus in response to density or moisture content changes [ 24 , 26 , 27 , 28 , 29 ], compared modulus measurements from each device and suggested relationships between them [ 14 , 23 , 26 ], and investigated statistical limits of the measurements in construction quality assurance [ 30 ]. In this study, we coped with the modulus measurement data obtained from PLT and LWD tests.…”

Section: Field Modulus Evaluating Devicesmentioning

confidence: 99%

Prediction Models Based on Regression and Artificial Neural Network for Moduli of Layers Constituted by Open-Graded Aggregates

et al. 2021

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The impermeable cover in urban area has been growing due to rapid urbanization, which prevents stormwater from being naturally infiltrated into the ground. There is a higher chance of flooding in urban area covered with conventional concretes and asphalts. The permeable pavement is one of Low-Impact Development (LID) technologies that can reduce surface runoff and water pollution by allowing stormwater into pavement systems. Unlike traditional pavements, permeable pavement bases employ open-graded aggregates (OGAs) with highly uniform particle sizes. There is very little information on the engineering properties of compacted OGAs. In this study, the moduli of open-graded aggregates under various compaction energies are investigated based on the Plate Load Test (PLT) and Light-Weight Deflectometer (LWD). Artificial Neural Network (ANN) and Linear Regression (LR) models are employed for estimation of the moduli of the aggregates based on the material type and level of compaction. Overall, the moduli from PLT and LWD steeply increase until the number of roller passes reaches 4, and they gradually increase until the number of roller passes becomes 8. A set of simple linear equations are proposed to evaluate the moduli of open-graded aggregates from PLT and LWD based on the material type and the number of roller passes.

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Section: Field Modulus Evaluating Devicesmentioning

confidence: 99%

Prediction Models Based on Regression and Artificial Neural Network for Moduli of Layers Constituted by Open-Graded Aggregates

et al. 2021

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Experimental-mechanistic analysis of pavement base deflections measured with light weight deflectometer

Yao¹,

Li²,

Guo³

et al. 2023

Journal of Traffic and Transportation Engineering (English Edit

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Quality control of compaction with lightweight deflectometer (LWD) device: a state-of-art

Duddu

Chennarapu

2022

Geo-Engineering

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The infrastructure plays a vital role in stimulating economic growth. Any infra project requires proper planning, design, construction, quality control (QC), and quality assessment (QA). It is important to comply with QC and QA to avoid failure and enhance the long-term pavement performance in order to provide a safe and solid system of transportation. Researchers were replacing laborious and time-consuming density-based methods (sand cone and/or core cutter) with advanced stiffness or modulus-based NDT devices for the QC of compacted geomaterials. The lightweight deflectometer (LWD) is such a highly advanced and sophisticated device that was developed to evaluate the deformation modulus (ELWD) of compacted geomaterials as an alternative of density test. This device is portable, light-weight, user-friendly, and it is ideally suitable for all constructional geomaterials. This study is intended to provide a state-of-the-art on the LWD device as well as presented the ranges of deformation modulus for various geomaterials from several studies. For instance, in the case of soils, aggregates, and asphalt materials deformation modulus values were found to be in the range of 35–60 MPa, 80–120 MPa, and 120–170 MPa respectively. In addition, several studies have been compiled to completely comprehend the relationship between LWD and various devices.

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Developing Statistical Limits for Using the Light Weight Deflectometer (LWD) in Construction Quality Assurance

Cited by 4 publications

References 22 publications

Prediction Models Based on Regression and Artificial Neural Network for Moduli of Layers Constituted by Open-Graded Aggregates

Prediction Models Based on Regression and Artificial Neural Network for Moduli of Layers Constituted by Open-Graded Aggregates

Experimental-mechanistic analysis of pavement base deflections measured with light weight deflectometer

Quality control of compaction with lightweight deflectometer (LWD) device: a state-of-art

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