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Kuttah, D. K. (2024). Using Repeated Light-Weight Deflectometer Test Data to Predict Flexible Pavement Responses Based on the Mechanistic-Empirical Design Method. Construction Materials, 4(1), 216-237
Open this publication in new window or tab >>Using Repeated Light-Weight Deflectometer Test Data to Predict Flexible Pavement Responses Based on the Mechanistic-Empirical Design Method
2024 (English)In: Construction Materials, E-ISSN 2673-7108, Vol. 4, no 1, p. 216-237Article in journal (Refereed) Published
Abstract [en]

This study investigated the potential of lightweight deflectometer (LWD) data in predicting layer moduli and response measurements within the Mechanistic–Empirical Pavement Design Guide. To achieve this goal, field repeated LWD tests and laboratory repeated load triaxial tests were carried out on granular base material compacted at 3% and 6% water content, sandy subgrade soil compacted at 3%, 4% and 9% water content and silty sand subgrade soil compacted at 8% and 10% water content. The results revealed that substituting traditional repeated load triaxial (RLT) data with LWD data for predicting these parameters was notably effective for cohesionless materials, especially for unbound granular materials (UGMs) compacted at optimum water content. The accuracy and reliability of predictions were remarkably high, showcasing the potential of LWD to enhance efficiency and precision in pavement design within this context. Conversely, for cohesive road materials, the study emphasized the importance of considering specific material properties and water content when integrating LWD into the Mechanistic–Empirical Pavement Design Guide. The distinctive characteristics and behaviors of cohesive materials necessitate a nuanced approach. This understanding is critical to ensuring the accuracy and reliability of pavement design and assessment across diverse conditions. In summary, the study presents a promising avenue for utilizing LWD data in cohesionless road materials, offering potential cost and time-saving advantages. Additionally, it underscores the necessity of tailored approaches when considering material properties and moisture content for cohesive materials, thereby advancing the field of pavement engineering by providing insights for improved practices and adaptable frameworks.

Place, publisher, year, edition, pages
MDPI, 2024
Keywords
resilient modulus, weight deflectometer, repeated load triaxial test, ERAPAVE, response measurements
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:vti:diva-20331 (URN)10.3390/constrmater4010012 (DOI)
Funder
Swedish Transport Administration, BVFF: 7628
Available from: 2024-02-09 Created: 2024-02-09 Last updated: 2024-03-12Bibliographically approved
Kuttah, D. K. (2023). Assessing the interactions among factors affecting the light-weight deflectometer measurements. Bulletin of Engineering Geology and the Environment, 82(6), Article ID 238.
Open this publication in new window or tab >>Assessing the interactions among factors affecting the light-weight deflectometer measurements
2023 (English)In: Bulletin of Engineering Geology and the Environment, ISSN 1435-9529, E-ISSN 1435-9537, Vol. 82, no 6, article id 238Article in journal (Refereed) Published
Abstract [en]

Many different factors can influence the outcomes of light-weight deflectometer (LWD) tests. Some of these factors are specific to the type of the used LWD, while others are related to the testing conditions. This paper summarizes the findings of a detailed investigation into the relationships between variables altering the measurements of the light-weight deflectometer test. Field testing was performed to investigate the effect of the sensing configuration (measurement of plate vs ground surface) and testing configuration (in terms of applied load magnitude, number of loadings, and moisture content). To accomplish this objective, a number of in situ LWD and moisture content investigations were conducted on two selected construction materials, namely, sandy subgrade soil and unbound granular material. Considering the multiple influencing factors involved in this study and the material dependency, relationships between the plate deformations and ground deformations could be developed, something which will help in overcoming the standardization problem of various LWD devices and their effect on the compaction control process. © 2023, The Author(s).

Place, publisher, year, edition, pages
Springer, 2023
Keywords
Applied load, Deformation, Light-weight deflectometer, Moisture content, Number of loadings, Sensing configurations
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:vti:diva-19768 (URN)10.1007/s10064-023-03231-2 (DOI)000999628600001 ()2-s2.0-85160964111 (Scopus ID)
Funder
Swedish Transport Administration
Available from: 2023-06-13 Created: 2023-06-13 Last updated: 2023-06-29Bibliographically approved
Kuttah, D. K. (2023). Measurement of subgrade soil permanent deformations under repeated loadings during simple in-situ test. In: António Viana da Fonseca; Cristiana Ferreira (Ed.), Proceedings of the 8th International Symposium on Deformation Characteristics of Geomaterials: . Paper presented at 8th International Symposium on Deformation Characteristics of Geomaterials Porto, Portugal, 3-6 September, 2023.
Open this publication in new window or tab >>Measurement of subgrade soil permanent deformations under repeated loadings during simple in-situ test
2023 (English)In: Proceedings of the 8th International Symposium on Deformation Characteristics of Geomaterials / [ed] António Viana da Fonseca; Cristiana Ferreira, 2023Conference paper, Published paper (Other academic)
Abstract [en]

It is well known that permanent deformation has a significant influence on the performance of pavements because it leads to an increase in maintenance operations and costs and reduces ride quality. Therefore, it is important to predict the permanent deformations during the design stage. Due to the fact that up to date there is no simple test equipment and procedure that enables a direct in-situ measurement of permanent deformations of subgrade soil under repeated loading, the current research has been undertaken to evaluating a new testing approach to fulfil this requirement. The current study deals with developing a new multifunctional lightweight deflectometer (LWD) that can be used to determine the in-situ permanent deformations of subgrade soil due torepeated loading by simple, cheap and time saving testing approach.

It was concluded that the suggested repeated light weight deflectometer test could give a powerful material assessmentand pavement design tool for the analysis of compacted subgrade soil used in this study. The developed LWD that canmeasure the permanent deformations directly could be utilized to establish the risk level of permanent deformations in the subgrade soil in pavement constructions during the design and construction stages.

National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:vti:diva-19890 (URN)
Conference
8th International Symposium on Deformation Characteristics of Geomaterials Porto, Portugal, 3-6 September, 2023
Available from: 2023-09-11 Created: 2023-09-11 Last updated: 2023-09-13Bibliographically approved
Kuttah, D. K. (2023). Recycling of industrial and construction waste materials in roads construction. International Journal of Geotechnical Engineering
Open this publication in new window or tab >>Recycling of industrial and construction waste materials in roads construction
2023 (English)In: International Journal of Geotechnical Engineering, ISSN 1938-6362, E-ISSN 1939-7879Article in journal (Refereed) Epub ahead of print
Abstract [en]

Usually, aggregates used for asphalt mixtures consist mainly of natural aggregates. Sometimes the natural aggregates are substituted with limited amounts of industrial and construction wastes. The current paper deals with evaluating the mechanical performance of new developed hot asphalt mixtures made of up to 98% industrial and construction by products. In this project, different types of industrial by-products, namely, RAP, foundry sand, and steel slag in addition to biobased rejuvenators have been used to find the composition of the best asphalt mixtures made mainly of wastes that can substitute the asphalt mixtures made of natural aggregates. Fourteen selected asphalt mixtures have been evaluated using the circular road simulator test at VTI. The CRS testing program has been set up to allow different measurements, e.g. surface deterioration and wear, friction, and visual inspection. The test results demonstrated that it is possible to obtain paving mixtures with high content of recycled materials.

Place, publisher, year, edition, pages
Taylor & Francis, 2023
Keywords
Accelerated load testing, asphalt mixtures, construction waste, Recycling
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:vti:diva-19840 (URN)10.1080/19386362.2023.2239684 (DOI)001039433600001 ()2-s2.0-85166427096 (Scopus ID)
Available from: 2023-08-16 Created: 2023-08-16 Last updated: 2023-08-17Bibliographically approved
Kuttah, D. K. (2022). Advances in Design and Testing of Future Smart Roads: Considering Urbanization, Digitalization, Electrification and Climate Change (1ed.). London: CRC Press
Open this publication in new window or tab >>Advances in Design and Testing of Future Smart Roads: Considering Urbanization, Digitalization, Electrification and Climate Change
2022 (English)Book (Other academic)
Abstract [en]

The streets and roads constitute an enormous part of civil infrastructure and a large part of our cities- a social resource that must be properly managed and developed. Therefore, many road construction companies, contractors, transport and traffic administrations and municipalities are seeking for new road design models that can withstand modern challenges and demands. This book deals with adapting current road designs to better withstand these future challenges as well as optimizing their structural design. Furthermore, the book illustrates recommendations and models for street/road sections, including the road section with a reconfigurable design, which can be used in both reconstruction and new construction of roads.

Features:

  • Covers road testbeds that meet the challenge of future urbanization, including digitalization and electrification
  • Provides recommendations for potential climate change impacts, including flooding and ice accumulation problems
  • Introduces the concept of reconfigurable and removable streets including recommendations for corresponding street testbeds 
Place, publisher, year, edition, pages
London: CRC Press, 2022. p. 94 Edition: 1
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:vti:diva-19250 (URN)10.1201/9781003280224 (DOI)9781003280224 (ISBN)
Available from: 2022-12-02 Created: 2022-12-02 Last updated: 2023-06-02Bibliographically approved
Kuttah, D. K. (2022). Assessing the Use of By Product Foundry Sand in Asphalt Mixtures. In: Proceedings of the 7th International Conference on Civil Structural and Transportation Engineering (ICCSTE'22): . Paper presented at (ICCSTE'22), Niagara Falls, Canada – June 05-07, 2022 (pp. 8). , Article ID 101.
Open this publication in new window or tab >>Assessing the Use of By Product Foundry Sand in Asphalt Mixtures
2022 (English)In: Proceedings of the 7th International Conference on Civil Structural and Transportation Engineering (ICCSTE'22), 2022, p. 8-, article id 101Conference paper, Published paper (Refereed)
Abstract [en]

It is well known that recycling of by-product materials saves natural resources, reduce by-product volumes, and reduce the need to virgin materials. The steel industry produces a myriad of metal components for industrial chains, which in turn generates mineral discarded sand molds. Although these sands are clean before their use, after casting they may contain contaminants. Therefore, huge quantities of excess by-product foundry sand (BFS) end up occupying large volumes in landfills. In Sweden, approximately 200000 tonnes of excess BFS end up in landfills. The transportation and construction industries have the greatest potential for reuse by-products because they use vast quantities of earthen materials annually. Accordingly, an experimental work has been undertaken to evaluate the possible use of two chosen BFS from two Swedish foundries in a conventional Swedish asphalt mixture. The experimental procedure of this research has focused on the dosage, environmental and technical properties of the same mixture type ABT 11 and the same bitumen (160/220) but at different replacement proportions of the conventional fine sand with the two BFS. The environmental requirements in addition to the technical requirements, namely, void ratio, static indirect tensile strength ratio, and resilient modulus before and after moisture induced sensitivity tests of the asphalt mixtures have been investigated in the current study. The test results demonstrated that the BFS from both foundries can be incorporated in the selected asphalt mixture at specified replacement proportions of the conventional fine sand fraction 0-2 mm as discussed in the paper.

National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:vti:diva-18775 (URN)10.11159/iccste22.101 (DOI)
Conference
(ICCSTE'22), Niagara Falls, Canada – June 05-07, 2022
Available from: 2022-06-17 Created: 2022-06-17 Last updated: 2022-06-17Bibliographically approved
Andersson, A., Blissing, B., Carlsson, H., Erlingsson, S., Hellman, F., Hjort, M., . . . Thorslund, B. (2022). Designguide för Smarta gator. KTH, Chalmers, VTI, Spacescape, Sweco & White Arkitekter
Open this publication in new window or tab >>Designguide för Smarta gator
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2022 (Swedish)Report (Other academic)
Abstract [sv]

Sammanfattningsvis definierar vi i denna guide ’smarta gator’ kort sagt som mångfunktionella, levande, långsamma, ekologiska och flexibla gator. Det övergripande målet med denna guide är följaktligen ”Smarta gator för en hållbar stadsutveckling”.

Place, publisher, year, edition, pages
KTH, Chalmers, VTI, Spacescape, Sweco & White Arkitekter, 2022. p. 245
Series
TRITA-ABE-RPT ; 2211
National Category
Architectural Engineering Infrastructure Engineering
Identifiers
urn:nbn:se:vti:diva-19080 (URN)978-91-8040-257-6 (ISBN)
Funder
Vinnova
Available from: 2022-10-14 Created: 2022-10-14 Last updated: 2023-09-20Bibliographically approved
Kuttah, D. K. (2022). Laboratory assessment of gravel wearing course stabilization under various climate conditions. Linköping: Statens väg- och transportforskningsinstitut
Open this publication in new window or tab >>Laboratory assessment of gravel wearing course stabilization under various climate conditions
2022 (English)Report (Other academic)
Alternative title[sv]
Laboratoriestudie av stabilisering av grusslitlager under olika klimatförutsättningar
Abstract [en]

The purpose of this research is to investigate the efficacy of stabilizing local gravel wearing course (GWC) and assessing the possibilities and weaknesses of five non-traditional stabilizing agents to improve the properties of the selected GWC. The main research is based on carrying out laboratory light weight deflectometer (LWD) tests to evaluate the deformation characteristics of unstabilized and stabilized GWC mixtures compacted in CBR molds. 

A laboratory experimental test program was conducted to evaluate the effect of freeze-thaw cycles and soaking-drying cycles on the properties of stabilized and unstabilized GWC samples. The treatments were manifested in adding 1) recommended dosage of clay only, 2) DUST/BLOKR (DBSB), 3) Listab, 4) esoliTSS, 5) clay with Road stabilizer (RS) and 6) clay with TerraZyme (TZ), to the chosen GWC. The series of unstabilized GWC was used as a control group. 

The results of this research showed that for GWC samples unexposed to climate simulation, the maximum decrease in average deformations was 13% for GWC stabilized with esoliTSS followed by 11% for samples stabilized with DBSB. 

After exposing the samples to ten freeze-thaw cycles “FTCs”, the GWC samples stabilized with DBSB was the only group suffered from noticeable damage. The total increase in the average deformation was about 18.4% as compared to untreated GWC samples exposed to the same number of FTCs. On the other hand, the GWC samples with esoliTSS showed best performance after exposing to FTCs. 

With respect to samples exposed to five soaking-drying cycles (SDCs), the GWC samples treated with DBSB showed about 23% increase in deformations compared to the reference exposed to five SDC, (and hence a reduction in stability). Also, the GWC samples treated with DBSB recorded 17% higher deformations due to SDCs as compared to untreated GWC samples exposed to same number of SDC. The GWC samples stabilized with esoliTSS and Listab performed best after exposing to SDCs.

Abstract [sv]

Syftet med denna studie är att undersöka effekterna av olika stabiliseringsmedel på grusslitlager. Det har testats fem olika icke-traditionella stabiliseringsmedel för att undersöka hur de kan förbättra grusslitlagrets egenskaper. En lätt fallvikt (LWD, Light Weight Deflectometer) har använts för att undersöka deformationsegenskaperna på material packade i så kallade CBR-cylindrar (diameter 150 mm, provhöjd 120 mm). De packade proverna utsattes för både frys-töcykler och vattenmättnings[1]torkningscykler. 

De stabiliseringsmetoder som användes var ”bara” lera, Dust block (DBSB), Lignin, esoliTSS, lera med Road Stabilizer (RS) och lera med TerraZyme (TZ). Ostabiliserat grusslitlager användes som referensmaterial. 

Resultaten i denna studie visar grusslitlager utan klimatsimulering stabiliserade med esoliTSS visade på 13 % mindre deformationer (dvs. bättre stabilitet). För prover stabiliserade med DBSB minskade deformationerna med 11 %. 

Det enda stabiliseringsmedel som var känsligt för frys-töcykler var DBSB. För dessa prover försämrades stabiliteten, det vill säga deformationerna ökade med 18 % jämfört med obehandlat grusslitlager. Grusslitlager med esoliTSS hade bäst prestanda efter frys-töcykler. 

När det gäller de prover som exponerats för vattenmättnings- och torkningscykler visade de grusslitlagerprover som behandlades med DBSB en ökning av deformationerna med omkring 23 % (och därmed en minskning av stabiliteten). Dessutom registrerade grusslitlagerproverna som behandlats med DBSB 17 % högre deformationer på grund av vattenmättnings- och torkningscykler jämfört med obehandlade grusslitlagerprover. 

Grusslitlager stabiliserade med esoliTSS och Lignin presterade bäst efter att ha exponerats för vattenmättnings- och torkningscykler.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2022. p. 84
Series
VTI rapport, ISSN 0347-6030 ; 1132A
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:vti:diva-18784 (URN)
Available from: 2022-06-22 Created: 2022-06-22 Last updated: 2022-06-22Bibliographically approved
Kuttah, D. K. (2022). Modelling the permanent strains measured by in-situ cyclic light weight deflectometer for silty sand subgrade soil. In: Inge Hoff, Helge Mork and Rabbira Garba Saba (Ed.), Proceedings of the 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume2: . Paper presented at Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields (pp. 535-544). CRC Press, 2
Open this publication in new window or tab >>Modelling the permanent strains measured by in-situ cyclic light weight deflectometer for silty sand subgrade soil
2022 (English)In: Proceedings of the 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume2 / [ed] Inge Hoff, Helge Mork and Rabbira Garba Saba, CRC Press, 2022, Vol. 2, p. 535-544Conference paper, Published paper (Refereed)
Abstract [en]

It is well known that limiting rutting in pavements should consider the actual load-associated plastic (permanent) strains. Therefore, the Swedish transport administration have paid a particular attention to find a simple in-situ time saving technique that can be used to predict the permanent strains for unbound road materials to provide a powerful material assessment and pavement design tool. Such a design tool can be utilized to establish the risk level of permanent strains in the unbound road layer during the design and construction stages something which may result in an increase in pavement service life. To fulfill the objective of the study, cyclic (repeated) light weight deflectometer tests have been conducted at a test pit located at the backyard of VTI in Linköping. A silty sand subgrade soil has been chosen for testing. Initially, the selected subgrade soil was placed in the test pit and thoroughly compacted using a small vibrator, then, series of in-situ cyclic LWD were conducted at different ranges of water contents (namely 8%, 10% and 15%) and various applied stress levels (namely, 50 kPa, 100 kPa and 200 kPa).

Prediction models for accumulated permanent strains based on the cyclic LWD measurements are suggested in this study. These models correlate the measured accumulated permanent strains using the new developed LWD to the number of loading cycles, stress levels and water contents. It is expected that the suggested models will provide supporting data for an increased understanding of future pavements ruts. For the tested subgrade soil, the suggested models have showed good matching to the accumulated permanent strain (εp) data measured by the cyclic LWD tests except for the cases of p=100 kPa and 200 kPa at 15% water content due to the excessive accumulated permanent deformations reported for these cases.

Place, publisher, year, edition, pages
CRC Press, 2022
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:vti:diva-18855 (URN)10.1201/9781003222897-50 (DOI)9781003222897 (ISBN)
Conference
Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields
Available from: 2022-08-03 Created: 2022-08-03 Last updated: 2022-08-03Bibliographically approved
Kuttah, D. K. (2022). Nya utmaningar kräver smarta gator. Kia story (2), 12-12
Open this publication in new window or tab >>Nya utmaningar kräver smarta gator
2022 (Swedish)In: Kia story, no 2, p. 12-12Article in journal (Other (popular science, discussion, etc.)) Published
Place, publisher, year, edition, pages
Kia Sweden, 2022
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:vti:diva-19842 (URN)
Available from: 2023-08-18 Created: 2023-08-18 Last updated: 2023-08-18Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-0478-1150

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