Correlation of modulus elasticity of Falling Weight Deflectometer (FWD) towards Light Weight Deflectometer (LWD) laboratory

Caroles, Lucky; Djamaluddin, A. R.; Amiruddin, A. A.; Arsyad, Ardy

doi:10.1088/1755-1315/419/1/012039

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…Through study performed at the Road and Bridge Research Center, the following will describe numerous varieties of LWD, including those manufactured outside and those produced by Indonesians (Puslitbang). The Pusjatan LWD is the outcome of research [30] undertaken during the 2012 and 2013 budget years at the Research and Development Center for Roads and Bridges (Figures 2 and 3). West Java has used the Pusjatan LWD on various parts of dirt roads.…”

Section: Light Weight Deflectometer (Lwd)mentioning

confidence: 99%

“…Light Weight Deflectometer (LWD) Modification is an alternate instrument for quality control of compaction. It can be shown that employing this Modified LWD tool as a quality control tool has various benefits, including efficiency in terms of time, money, and the number of workers necessary [2]. The Binamarga (Indonesian Road Development Office) 2018 standard mandates the utilization of LWD in the inspection process for granular layer compaction in road building projects [3].…”

Section: Introductionmentioning

confidence: 99%

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Asphalt Elasticity Modulus Comparison Using Modified Laboratory LWD Against UMMATA Method

Caroles

2022

Civ Eng J

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Highway consultants need pavement structure strength to examine and design. With advances in computer, sensor, and microelectronic technologies, the light weight deflectometer (LWD) can measure granular and asphalt layers. This portable, easy-to-use tool is suggested. This article was designed to improve LWD Pusjatan's accuracy and distinguish it from other testing methods. This study compares the LWD Pusjatan and UMMATA (Universal Material Testing Apparatus) methods for measuring modulus of elasticity on different materials. Boussinesq elastic theory is used to compute the modulus of most LWDs. In a semi-elastic environment, modulus is the connection between pressure and displacement in a rigid or flexible basis. The deflection value is derived from the process of vibrations caused by a load delivered from a given height onto a test item, with the wave/vibration collected by an acceleration measuring instrument, such as a geophone or accelerometer. The modulus of elasticity provided by the AUDL (Laboratory Deflection Test Equipment) method is less than that produced by the UMMATA method. According to the test results, the average value of AC Base material is 7.52% less than that of AC Base. The average value of AC BC material is just over 0.3%. These results indicate that more testing is necessary when using the AUDL methodology to detect correlations that might serve as a basis for comparison. Thus, the AUDL test method may be used as a nondestructive testing technique. This kind of non-destructive technique should be used frequently so that simulations of field circumstances are more accurate. Doi: 10.28991/CEJ-2022-08-06-012 Full Text: PDF

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Section: Light Weight Deflectometer (Lwd)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Asphalt Elasticity Modulus Comparison Using Modified Laboratory LWD Against UMMATA Method

Caroles

2022

Civ Eng J

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“…Indonesia is an archipelago where the Indo-Australian, Eurasian, and Pacific tectonic plates converge [1]. Indonesia is an area of intense volcanic and seismic activity due to the interactions between these tectonic plates [2,3]. The process of plate dynamics, which is quite intense, has also formed a distinct and quite varied relief of the earth's surface, ranging from mountainous regions with steep slopes that seem to imply a high potential for landslides to gently sloping coastal regions with potential threats of flooding, subsidence, and tsunamis [4,5].…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Seismic Hazard Analysis on Pavement Failure Restoration; Case Study of Sorong–Makbon Road

Caroles

2023

Sustainability

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The Sorong–MakbonSorong–Makbon Corridor is one of the key routes connecting Sorong to other sections of the West Papua region in Indonesia. Throughout the Sorong–Makbon Corridor, roads and slopes often sustain damage. When landslides reach the road shoulder and destroy the pavement, they often prevent access to the road. In addition to the influence of surface water runoff, there are indications that earthquakes contribute to the ineffectiveness of the previous design. This seems to be accurate since the author has seen the typical movement of avalanches. Using the Probabilistic Seismic Hazard Analysis (PSHA) approach, the earthquake’s effects on this corridor were mapped out. With the use of the Indonesian earthquake data library, the Matlab-Zmap Program, and the Spectrum Response, the history of earthquakes in the Sorong–Makbon corridor was analysed to determine their velocity. This analysis reveals that the earthquake’s influence on the Sorong–Makbon corridor has an acceleration value between 1.2 and 1.5 G. The prior design did not account for a quake of this magnitude. With this study, the correctly identified seismic impact could be sent back into the simulation to more adequately repair and restore the damage.

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Light Weight Deflectometer Configurations for Testing Thin Asphalt Pavements

Ordaz,

Doyle

2024

Transportation Research Record: Journal of the Transportation R

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The light weight deflectometer (LWD) is used to determine fundamental soil properties such as deflection and modulus. Recently, the LWD has been investigated as a potential structural evaluation tool for thin flexible pavements to generate input data for structural performance prediction models of thin flexible pavements. The falling weight deflectometer (FWD) can be used for the evaluation of thin flexible pavements; however, the relatively high cost and logistics burden, which also may render FWD unsuitable for many local agencies, are disadvantageous for the rapid assessment of dispersed rural roadways. The LWD is a potential alternative; however, since various LWD models are available and multiple testing configurations are possible, this study focused on determining which LWD configuration(s) produce structural responses that most closely correspond to FWD. Ten different LWD combinations of base plate diameter, drop weight, and drop height were tested on two full-scale thin asphalt test sections under closely comparable temperature and moisture conditions. The LWD’s ability to indicate structural conditions was compared with that of the FWD through impulse stiffness modulus. The distribution of stress within the pavements was measured during testing. In addition, the LWD’s repeatability was assessed and found to be similar to that of the FWD. As a result, the small 5.91-in. plate diameter, 22-in. drop height, and largest available hammer weights for both LWD models obtained good repeatability and the closest correspondence to FWD when tested on thin flexible pavements.

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Correlation of modulus elasticity of Falling Weight Deflectometer (FWD) towards Light Weight Deflectometer (LWD) laboratory

Cited by 3 publications

References 3 publications

Asphalt Elasticity Modulus Comparison Using Modified Laboratory LWD Against UMMATA Method

Asphalt Elasticity Modulus Comparison Using Modified Laboratory LWD Against UMMATA Method

Probabilistic Seismic Hazard Analysis on Pavement Failure Restoration; Case Study of Sorong–Makbon Road

Light Weight Deflectometer Configurations for Testing Thin Asphalt Pavements

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