Roads and Bridges - Drogi i Mosty
19, 3, 2020, 199-210

Recycling of cement kiln dust from cement plants to improve mechanical properties of road pavement base course

Ayoup M. Ghrair Mail
Al-Balqa Applied University, Water Resources and Environmental Management Department, Al-Salt 19117, P.O. Box 206, Jordan
Nawal Louzi Mail
Al-Ahliyya Amman University, Engineering Faculty, Civil Engineering Department, Al-Salt, Amman, Jordan
Published: 2020-09-30

Abstract

In the study, the potential of reuse of cement kiln dust (CKD) to improve the stability properties of the base course of road pavements was investigated. CKD was characterized chemically and physically. The results revealed that addition of CKD improved the mechanical properties of the base course significantly. The results showed a significant increase in California Bearing Ratio, from 234.5% measured for untreated base to 334.4%, 362.7% and 384.6% for CKD content of 5%, 15% and 25%, respectively. In terms of chemical composition, CKD is similar to cement. Scanning electron microscope images showed that the average particle size is approximately 0.5 microns. The granules are mainly spherically shaped, with cubic crystals of sodium and potassium salts. The leachability study of CKD in the base course revealed that heavy metal concentrations in CKD are fixed and insoluble in water.

Keywords


base course, cement kiln dust, highways, pavement, recycled solid waste.

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References


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Recycling of cement kiln dust from cement plants to improve mechanical properties of road pavement base course

  
Ghrair, Ayoup M.; Louzi, Nawal. Recycling of cement kiln dust from cement plants to improve mechanical properties of road pavement base course. Roads and Bridges - Drogi i Mosty, [S.l.], v. 19, n. 3, p. 199-210, sep. 2020. ISSN 2449-769X. Available at: <>. Date accessed: 29 Nov. 2020. doi:http://dx.doi.org/10.7409/rabdim.020.013.