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Original Research
Online Published: 02 Apr 2022
 


Mechanical Properties of Asphalt Concrete with Crumb Rubber as Partial Replacement for Coarse Aggregate

Ashiru Mohammed, Tasiu Ashiru Sulaiman, Ibrahim Aliyu, Aliyu Aliyu Abdurrahman, Ibrahim Usman Yunusa.


Abstract
This study investigates the mechanical properties of asphalt concrete with crumb rubber (CR) as partial replacement of coarse
aggregate for wearing course. The proportions of the coarse aggregate replacement with crumb rubber (CR) were 5 %, 10 %, 15
%, 20 %, and 25 % by weight of the coarse aggregate. The Marshall Hot Mix Asphalt (HMA) design tests method was adopted in
which 15 specimens (3 samples each of the proportion) were prepared for the evaluation of Stability, flow, bulk density, air void
percentage, and void in mineral aggregate. These tests were conducted after a control test to ascertain the optimum bitumen
content (OBC) with 0 % crumb rubber (CR) and 5 %, 5.5 %, 6 %, 6.5 %, and 7 % of bitumen by weight of the asphalt mixture. It
was found that 5.5 % of bitumen content is suitable for the experiment. At the end of the research, it was found that 20 % of crumb
rubber (CR) replaced coarse aggregate in asphalt concrete is suitable for wearing course having satisfied Nigerian General
Specifications for Roads and Bridges (NGSRB, 1990) for criteria of Stability and flow. Hence, the optimum percentage of crumb
rubber (CR) to be used as coarse aggregate in asphalt concrete mix for wearing course is 20 %

Key words: Asphalt concrete, Coarse Aggregate, crumb rubber (CR), Hot Mixed, Optimum Bitumen Content (O.B.C),


 
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How to Cite this Article
Pubmed Style

Mohammed A, Sulaiman TA, Aliyu I, Abdurrahman AA, Yunusa IU. Mechanical Properties of Asphalt Concrete with Crumb Rubber as Partial Replacement for Coarse Aggregate. NJE. 2021; 28(3): 75-79.

Web Style

Mohammed A, Sulaiman TA, Aliyu I, Abdurrahman AA, Yunusa IU. Mechanical Properties of Asphalt Concrete with Crumb Rubber as Partial Replacement for Coarse Aggregate. https://www.njeabu.com.ng/?mno=8358 [Access: June 27, 2026].

AMA (American Medical Association) Style

Mohammed A, Sulaiman TA, Aliyu I, Abdurrahman AA, Yunusa IU. Mechanical Properties of Asphalt Concrete with Crumb Rubber as Partial Replacement for Coarse Aggregate. NJE. 2021; 28(3): 75-79.


Vancouver/ICMJE Style

Mohammed A, Sulaiman TA, Aliyu I, Abdurrahman AA, Yunusa IU. Mechanical Properties of Asphalt Concrete with Crumb Rubber as Partial Replacement for Coarse Aggregate. NJE. (2021), [cited June 27, 2026]; 28(3): 75-79.


Harvard Style

Mohammed, A., Sulaiman, . T. A., Aliyu, . I., Abdurrahman, . A. A. & Yunusa, . I. U. (2021) Mechanical Properties of Asphalt Concrete with Crumb Rubber as Partial Replacement for Coarse Aggregate. NJE, 28 (3), 75-79.


Turabian Style

Mohammed, Ashiru, Tasiu Ashiru Sulaiman, Ibrahim Aliyu, Aliyu Aliyu Abdurrahman, and Ibrahim Usman Yunusa. 2021. Mechanical Properties of Asphalt Concrete with Crumb Rubber as Partial Replacement for Coarse Aggregate. Nigerian Journal of Engineering, 28 (3), 75-79.


Chicago Style

Mohammed, Ashiru, Tasiu Ashiru Sulaiman, Ibrahim Aliyu, Aliyu Aliyu Abdurrahman, and Ibrahim Usman Yunusa. "Mechanical Properties of Asphalt Concrete with Crumb Rubber as Partial Replacement for Coarse Aggregate." Nigerian Journal of Engineering 28 (2021), 75-79.


MLA (The Modern Language Association) Style

Mohammed, Ashiru, Tasiu Ashiru Sulaiman, Ibrahim Aliyu, Aliyu Aliyu Abdurrahman, and Ibrahim Usman Yunusa. "Mechanical Properties of Asphalt Concrete with Crumb Rubber as Partial Replacement for Coarse Aggregate." Nigerian Journal of Engineering 28.3 (2021), 75-79. Print.


APA (American Psychological Association) Style

Mohammed, A., Sulaiman, . T. A., Aliyu, . I., Abdurrahman, . A. A. & Yunusa, . I. U. (2021) Mechanical Properties of Asphalt Concrete with Crumb Rubber as Partial Replacement for Coarse Aggregate. Nigerian Journal of Engineering, 28 (3), 75-79.


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