A Simplified Empirical Approach for Prediction of Pavement Layer Moduli Values Using Lightweight Deflectometer Data

Adigopula, Vinod Kumar

doi:10.1007/s42947-021-00050-0

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…Evaluation operations are directly tied to a pavement's repair and maintenance programme, assessing the road's geometric and structural qualities [11]. If the state of the pavement is still deemed satisfactory from a service standpoint, then only little maintenance will be performed [12]; however, if there is a decline in road performance, many measures will be done that are tailored to the kind of pavement damage [13]. Functional evaluation serves to determine the impact felt by road users.…”

Section: Performance Evaluation Of Flexible Pavementmentioning

confidence: 99%

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: Performance Evaluation Of Flexible Pavementmentioning

confidence: 99%

Asphalt Elasticity Modulus Comparison Using Modified Laboratory LWD Against UMMATA Method

Caroles

2022

Civ Eng J

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“…An LWD is a miniature version of a conventional falling weight deflectometer (FWD) and works on the same principle as the FWD. Previous studies have demonstrated the applicability of LWD as an evaluation device for determining pavement layer modulus in the field [15]. Investigations revealed that LWD played an essential role in determining the layer modulus and performing the design of overlay (in case of low-volume roads) [16].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Investigation and Field Performance Evaluation of Chemically Stabilized Cement Treated Subbase

Hazim,

Chopra,

Pathak

et al. 2024

Period. Polytech. Civil Eng.

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There is a growing concern over the depletion of naturally occurring construction materials for lower unbound pavement layers. Stabilization of locally available materials has attracted considerable research interest. Nanotechnological additives have a good potential in stabilizing materials that are incompatible for pavement construction. The main aim of this research is to evaluate the use of nano-chemical additives on the laboratory and field characteristics of cement treated subbase (CTSB) mixes prepared with locally available soil. Locally available soil, cement, and nano-chemicals were utilized to assess their effect on California bearing ratio (CBR) and unconfined compressive strength (UCS) of chemically treated subbase mixes. The UCS of the soil-aggregate mix treated with cement improved by 103.4% on the addition of nano-chemical additives. The soaked CBR of the mix treated with the optimum dosage of cement and nano-chemical was increased by 219%. The laboratory-based evaluation was followed by construction of field sections utilizing the control subbase (soil-aggregate only), cement-treated subbase, and cement+nano-chemical treated subbase mixes. Deflectometric investigations were performed on the field sections using a light weight deflectometer. X-ray diffraction and scanning electron microscopy tests were carried out to study the microstructure of subbase mixes. Stabilisation using nano chemicals resulted in additional phases of ettringite that caused densification of matrix compared to pristine soil-aggregate mix. Pavement analysis and economic analysis of the different subbase mixes were also performed. The subbase prepared with 3% cement and 1.2 kg/m3 dosage of nano-chemical additive was found to be the optimum considering laboratory and field performance.

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Comparison of Overlay Design in Between Lightweight Deflectometer and Benkelman Beam Deflection Test Results: A Case Study in India

Adigopula¹,

Bogireddy²,

Guzzarlapudi

2022

Lecture Notes in Civil Engineering

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A Simplified Empirical Approach for Prediction of Pavement Layer Moduli Values Using Lightweight Deflectometer Data

Cited by 7 publications

References 12 publications

Asphalt Elasticity Modulus Comparison Using Modified Laboratory LWD Against UMMATA Method

Asphalt Elasticity Modulus Comparison Using Modified Laboratory LWD Against UMMATA Method

Laboratory Investigation and Field Performance Evaluation of Chemically Stabilized Cement Treated Subbase

Comparison of Overlay Design in Between Lightweight Deflectometer and Benkelman Beam Deflection Test Results: A Case Study in India

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