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Research Article

Evaluation of cement-treated ferrochrome slag and quarry dust composites for base and sub-base layers of flexible pavement

CH Ajay, K Durga Rani

Civil Engineering Department, Andhra University, Visakhapatnam, Andhra Pradesh, India.

Keywords

Abstract


Ferrochrome slag;

Quarry dust;

Gradation;

Cement stabilization;

Ultrasonic pulse velocity;

Unconfined compressive strength

This study explores the use of ferrochrome slag as cement-bound granular layers of flexible pavement. To meet MoRTH design criteria, ferrochrome slag (FS) gradation was improved by incorporating quarry dust (Q) in proportions of 10%, 20%, 30%, 40%, and 50% (by weight). Only FS70Q30 and FS60Q40 composites have satisfied the gradation requirements of cementitious sub-base and base courses of flexible pavement. Unconfined compressive strength (UCS) and ultrasonic pulse velocity (UPV) tests were performed under OMC and MDD conditions on ferrochrome slag and quarry dust composites stabilized with cement in proportions of 2% to 10% (by weight of the aggregate mix) and curing periods of 3, 7, 14 and 28 days. FS70Q30 and FS60Q40 mixes exhibited a significant increase in strength and wave velocities with increasing cement content and curing periods. The UCS of FS60Q40 mixes was 1.03 to 1.62 times that of FS70Q30 mixes, and no significant variation in UPV was observed. An equation with a high regression factor (R-square >0.98) was formulated to correlate UCS and UPV values with cement content. Based on the developed statistical equation, the predicted minimum cement content for FS60Q40 mixes was found to be 12-16% lower than FS70Q30 mixes.

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LATEST News


27/12/2022 Reviewer Awards: The winners of 2022 reviewer awards of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Reviewer Awards section. 


23/12/2022 Best Paper Award: According to the Advisory Board decision, the paper authored by Nitin Kumar, Michele Barbato, Erika L. Rengifo-López and Fabio Matta entitled as “Capabilities and limitations of existing finite element simplified micro-modeling techniques for unreinforced masonry” is awarded the 2022 Best Paper Award of Research on Engineering Structures and Materials (RESM). 

23/12/2022 Most Cited Paper Award:  According to the Editorial Board evaluation, the paper authored by Aykut Elmas, Güliz Akyüz, Ayhan Bergal, Müberra Andaç and Ömer Andaç entitled as “Mathematical modelling of drug release" is awarded the 2022 Most Cited Paper Award of Research on Engineering Structures and Materials (RESM). 


13/04/2022 Fraudulent Emails Impersonating Our Journal: We noticed that some emails are sent to some people impersonating our journal staff as sender and requesting recipients to follow some links. Our journal and staff has nothing to do with these emails and please do not follow the given links. Senders seem to have malicious aims. The emails include a portion of some of our previous emails to the journal users and researchers. This is only to deceive the receiver and make them trust the email. Do not follow any links or perform suspicious actions specified in these emails. Please, check the sender info carefully. Even the sender address or name resembles the journal related words they are different, generally in an easily noticeable way.


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LATEST AWARDS


2022 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.


2022 Best Paper Award:

The paper authored by Nitin Kumar, Michele Barbato, Erika L. Rengifo-López and Fabio Matta entitled as “Capabilities and limitations of existing finite element simplified micro-modeling techniques for unreinforced masonry” is awarded the 


2022 Most Cited Paper Award:

The paper authored by Aykut Elmas, Güliz Akyüz, Ayhan Bergal, Müberra Andaç and Ömer Andaç entitled as “Mathematical modelling of drug release" is awarded the


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