Use of cement bypass dust as filler in asphalt concrete mixtures

Ramzi Taha, Amer Al-Rawas, Ali Al-Harthy, Ahmed Qatan

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Cement bypass dust (CBPD) or cement kiln dust is a by-product of the manufacture of portland cement. It is generated during the calcining process in the kiln. Lime (CaO) constitutes more than 60% of CBPD composition. Other compounds include SiO2, Al2O3, Fe2O3, K2O, Na2O, Cl-, etc. Oman Cement Company generates about 25,000-30,000 t of CBPD every year. Some CBPD is recycled back again with the clinker. However, most of the material is disposed of on-site without any further reuse or reclamation. As such, research was carried out to investigate potential reuses of CBPD in the Sultanate of Oman. This paper will present the results of a study that investigated the use of CBPD as a filler in asphalt paving mixtures. Initially, the effect of adding either lime or CBPD (0,3,5,7,10, and 15%) on binder properties (penetration, ductility, and softening point) was investigated. Then three different asphalt concrete mixtures were prepared using lime (control), and 5 and 13% CBPD substitution for lime or fine aggregate. The mixtures were subjected to Marshall testing. Results indicate that the substitution of 5% CBPD for lime will essentially produce the same optimum asphalt binder content as the control mixture (4.5%, by weight of aggregate) without any negative effect on asphalt concrete properties (stability, flow, voids in total mix, voids in mineral aggregate, and voids filled with asphalt). However, the use of 13% CBPD for lime and fine aggregate will require a higher optimum asphalt binder content of 5.7%, by weight of aggregate. This will produce an uneconomical mix. Thus, 5% CBPD substitution for lime or cement would be the optimum used in asphalt paving mixtures.

Original languageEnglish
Pages (from-to)338-343
Number of pages6
JournalJournal of Materials in Civil Engineering
Volume14
Issue number4
DOIs
Publication statusPublished - Jul 2002

Fingerprint

Asphalt concrete
Concrete mixtures
Dust
Fillers
asphalt
Cements
Lime
Asphalt
Binders
Substitution reactions
Kilns
Reclamation
Portland cement
lime
Minerals
Byproducts
Ductility

Keywords

  • Asphalt mixes
  • Portland cement
  • Recycling

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)
  • Mechanics of Materials

Cite this

Use of cement bypass dust as filler in asphalt concrete mixtures. / Taha, Ramzi; Al-Rawas, Amer; Al-Harthy, Ali; Qatan, Ahmed.

In: Journal of Materials in Civil Engineering, Vol. 14, No. 4, 07.2002, p. 338-343.

Research output: Contribution to journalArticle

@article{957f8f889b104c8aaae466da15073a4b,
title = "Use of cement bypass dust as filler in asphalt concrete mixtures",
abstract = "Cement bypass dust (CBPD) or cement kiln dust is a by-product of the manufacture of portland cement. It is generated during the calcining process in the kiln. Lime (CaO) constitutes more than 60{\%} of CBPD composition. Other compounds include SiO2, Al2O3, Fe2O3, K2O, Na2O, Cl-, etc. Oman Cement Company generates about 25,000-30,000 t of CBPD every year. Some CBPD is recycled back again with the clinker. However, most of the material is disposed of on-site without any further reuse or reclamation. As such, research was carried out to investigate potential reuses of CBPD in the Sultanate of Oman. This paper will present the results of a study that investigated the use of CBPD as a filler in asphalt paving mixtures. Initially, the effect of adding either lime or CBPD (0,3,5,7,10, and 15{\%}) on binder properties (penetration, ductility, and softening point) was investigated. Then three different asphalt concrete mixtures were prepared using lime (control), and 5 and 13{\%} CBPD substitution for lime or fine aggregate. The mixtures were subjected to Marshall testing. Results indicate that the substitution of 5{\%} CBPD for lime will essentially produce the same optimum asphalt binder content as the control mixture (4.5{\%}, by weight of aggregate) without any negative effect on asphalt concrete properties (stability, flow, voids in total mix, voids in mineral aggregate, and voids filled with asphalt). However, the use of 13{\%} CBPD for lime and fine aggregate will require a higher optimum asphalt binder content of 5.7{\%}, by weight of aggregate. This will produce an uneconomical mix. Thus, 5{\%} CBPD substitution for lime or cement would be the optimum used in asphalt paving mixtures.",
keywords = "Asphalt mixes, Portland cement, Recycling",
author = "Ramzi Taha and Amer Al-Rawas and Ali Al-Harthy and Ahmed Qatan",
year = "2002",
month = "7",
doi = "10.1061/(ASCE)0899-1561(2002)14:4(338)",
language = "English",
volume = "14",
pages = "338--343",
journal = "Journal of Materials in Civil Engineering",
issn = "0899-1561",
publisher = "American Society of Civil Engineers (ASCE)",
number = "4",

}

TY - JOUR

T1 - Use of cement bypass dust as filler in asphalt concrete mixtures

AU - Taha, Ramzi

AU - Al-Rawas, Amer

AU - Al-Harthy, Ali

AU - Qatan, Ahmed

PY - 2002/7

Y1 - 2002/7

N2 - Cement bypass dust (CBPD) or cement kiln dust is a by-product of the manufacture of portland cement. It is generated during the calcining process in the kiln. Lime (CaO) constitutes more than 60% of CBPD composition. Other compounds include SiO2, Al2O3, Fe2O3, K2O, Na2O, Cl-, etc. Oman Cement Company generates about 25,000-30,000 t of CBPD every year. Some CBPD is recycled back again with the clinker. However, most of the material is disposed of on-site without any further reuse or reclamation. As such, research was carried out to investigate potential reuses of CBPD in the Sultanate of Oman. This paper will present the results of a study that investigated the use of CBPD as a filler in asphalt paving mixtures. Initially, the effect of adding either lime or CBPD (0,3,5,7,10, and 15%) on binder properties (penetration, ductility, and softening point) was investigated. Then three different asphalt concrete mixtures were prepared using lime (control), and 5 and 13% CBPD substitution for lime or fine aggregate. The mixtures were subjected to Marshall testing. Results indicate that the substitution of 5% CBPD for lime will essentially produce the same optimum asphalt binder content as the control mixture (4.5%, by weight of aggregate) without any negative effect on asphalt concrete properties (stability, flow, voids in total mix, voids in mineral aggregate, and voids filled with asphalt). However, the use of 13% CBPD for lime and fine aggregate will require a higher optimum asphalt binder content of 5.7%, by weight of aggregate. This will produce an uneconomical mix. Thus, 5% CBPD substitution for lime or cement would be the optimum used in asphalt paving mixtures.

AB - Cement bypass dust (CBPD) or cement kiln dust is a by-product of the manufacture of portland cement. It is generated during the calcining process in the kiln. Lime (CaO) constitutes more than 60% of CBPD composition. Other compounds include SiO2, Al2O3, Fe2O3, K2O, Na2O, Cl-, etc. Oman Cement Company generates about 25,000-30,000 t of CBPD every year. Some CBPD is recycled back again with the clinker. However, most of the material is disposed of on-site without any further reuse or reclamation. As such, research was carried out to investigate potential reuses of CBPD in the Sultanate of Oman. This paper will present the results of a study that investigated the use of CBPD as a filler in asphalt paving mixtures. Initially, the effect of adding either lime or CBPD (0,3,5,7,10, and 15%) on binder properties (penetration, ductility, and softening point) was investigated. Then three different asphalt concrete mixtures were prepared using lime (control), and 5 and 13% CBPD substitution for lime or fine aggregate. The mixtures were subjected to Marshall testing. Results indicate that the substitution of 5% CBPD for lime will essentially produce the same optimum asphalt binder content as the control mixture (4.5%, by weight of aggregate) without any negative effect on asphalt concrete properties (stability, flow, voids in total mix, voids in mineral aggregate, and voids filled with asphalt). However, the use of 13% CBPD for lime and fine aggregate will require a higher optimum asphalt binder content of 5.7%, by weight of aggregate. This will produce an uneconomical mix. Thus, 5% CBPD substitution for lime or cement would be the optimum used in asphalt paving mixtures.

KW - Asphalt mixes

KW - Portland cement

KW - Recycling

UR - http://www.scopus.com/inward/record.url?scp=0036649597&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036649597&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)0899-1561(2002)14:4(338)

DO - 10.1061/(ASCE)0899-1561(2002)14:4(338)

M3 - Article

VL - 14

SP - 338

EP - 343

JO - Journal of Materials in Civil Engineering

JF - Journal of Materials in Civil Engineering

SN - 0899-1561

IS - 4

ER -