Sustainable Geopolymer Concrete for Pavements: Performance Evaluation of Recycled Concrete Aggregates in Fly Ash-Based Mixtures

Chava Venkatesh

Makale detayları

Sustainable Geopolymer Concrete for Pavements: Performance Evaluation of Recycled Concrete Aggregates in Fly Ash-Based Mixtures

Yazarlar:

Chava Venkatesh

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Transportation Engineering | Construction Materials

Dergi:

Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 3, pp.211-220

Belge Tipi:

Makale

Yayın Tarihi:

9/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001325225

pISSN:

2458-973X

Anahtar kelimeler:

Özet:

 This study investigates the feasibility of incorporating recycled concrete aggregates RCA into fly ash-based geopolymer concrete for sustainable pavement applications. The research evaluates RCAs physical and mechanical properties compared to virgin coarse aggregates VCA and assesses the performance of geopolymer concrete mixtures with up to 40 RCA replacement. Aggregate characterization revealed that RCA exhibited higher water absorption 4.39, crushing value 20.9, impact value 28.2, and abrasion value 26.1 compared to VCA, yet these values remained within acceptable limits for pavement applications. Geopolymer concrete specimens were tested for compressive strength, water absorption, abrasion resistance, and chloride ion permeability. Results indicated that increasing RCA content led to a gradual decrease in compressive strength, from 40.16 MPa to 33.52 MPa, while water absorption increased from 5.2 to 6.8. Abrasion resistance declined as RCA content rose, and chloride ion penetrability increased from 1687 to 2196 coulombs. However, mixtures with up to 20 RCA replacement met the strength and durability criteria required for pavement construction. This study demonstrates the potential for utilizing RCA in geopolymer concrete pavements, offering a sustainable solution for waste management and resource conservation in the construction industry.

 This study investigates the feasibility of incorporating recycled concrete aggregates RCA into fly ash-based geopolymer concrete for sustainable pavement applications. The research evaluates RCAs physical and mechanical properties compared to virgin coarse aggregates VCA and assesses the performance of geopolymer concrete mixtures with up to 40 RCA replacement. Aggregate characterization revealed that RCA exhibited higher water absorption 4.39, crushing value 20.9, impact value 28.2, and abrasion value 26.1 compared to VCA, yet these values remained within acceptable limits for pavement applications. Geopolymer concrete specimens were tested for compressive strength, water absorption, abrasion resistance, and chloride ion permeability. Results indicated that increasing RCA content led to a gradual decrease in compressive strength, from 40.16 MPa to 33.52 MPa, while water absorption increased from 5.2 to 6.8. Abrasion resistance declined as RCA content rose, and chloride ion penetrability increased from 1687 to 2196 coulombs. However, mixtures with up to 20 RCA replacement met the strength and durability criteria required for pavement construction. This study demonstrates the potential for utilizing RCA in geopolymer concrete pavements, offering a sustainable solution for waste management and resource conservation in the construction industry.

 This study investigates the feasibility of incorporating recycled concrete aggregates RCA into fly ash-based geopolymer concrete for sustainable pavement applications. The research evaluates RCAs physical and mechanical properties compared to virgin coarse aggregates VCA and assesses the performance of geopolymer concrete mixtures with up to 40 RCA replacement. Aggregate characterization revealed that RCA exhibited higher water absorption 4.39, crushing value 20.9, impact value 28.2, and abrasion value 26.1 compared to VCA, yet these values remained within acceptable limits for pavement applications. Geopolymer concrete specimens were tested for compressive strength, water absorption, abrasion resistance, and chloride ion permeability. Results indicated that increasing RCA content led to a gradual decrease in compressive strength, from 40.16 MPa to 33.52 MPa, while water absorption increased from 5.2 to 6.8. Abrasion resistance declined as RCA content rose, and chloride ion penetrability increased from 1687 to 2196 coulombs. However, mixtures with up to 20 RCA replacement met the strength and durability criteria required for pavement construction. This study demonstrates the potential for utilizing RCA in geopolymer concrete pavements, offering a sustainable solution for waste management and resource conservation in the construction industry.

 This study investigates the feasibility of incorporating recycled concrete aggregates RCA into fly ash-based geopolymer concrete for sustainable pavement applications. The research evaluates RCAs physical and mechanical properties compared to virgin coarse aggregates VCA and assesses the performance of geopolymer concrete mixtures with up to 40 RCA replacement. Aggregate characterization revealed that RCA exhibited higher water absorption 4.39, crushing value 20.9, impact value 28.2, and abrasion value 26.1 compared to VCA, yet these values remained within acceptable limits for pavement applications. Geopolymer concrete specimens were tested for compressive strength, water absorption, abrasion resistance, and chloride ion permeability. Results indicated that increasing RCA content led to a gradual decrease in compressive strength, from 40.16 MPa to 33.52 MPa, while water absorption increased from 5.2 to 6.8. Abrasion resistance declined as RCA content rose, and chloride ion penetrability increased from 1687 to 2196 coulombs. However, mixtures with up to 20 RCA replacement met the strength and durability criteria required for pavement construction. This study demonstrates the potential for utilizing RCA in geopolymer concrete pavements, offering a sustainable solution for waste management and resource conservation in the construction industry.

Makale detayları

Sustainable Geopolymer Concrete for Pavements: Performance Evaluation of Recycled Concrete Aggregates in Fly Ash-Based Mixtures

Yazarlar:

Chava Venkatesh

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Transportation Engineering | Construction Materials

Dergi:

Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 3, pp.211-220

Belge Tipi:

Makale

Yayın Tarihi:

9/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001325225

pISSN:

2458-973X

Compressive strength

Fly ash

Geopolymer concrete

Pavement

Recycled aggregates

Sayı

Makale detayları

Sustainable Geopolymer Concrete for Pavements: Performance Evaluation of Recycled Concrete Aggregates in Fly Ash-Based Mixtures

Yazarlar: Chava Venkatesh

Yayıncı: Yildiz Technical University

Ana Başlıklar: Transportation Engineering | Construction Materials

Dergi: Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 3, pp.211-220

Belge Tipi: Makale

Yayın Tarihi: 9/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001325225

pISSN: 2458-973X

Compressive strength

Fly ash

Geopolymer concrete

Pavement

Recycled aggregates

Sayı

Yazarlar:

Chava Venkatesh

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Transportation Engineering | Construction Materials

Dergi:

Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 3, pp.211-220

Belge Tipi:

Makale

Yayın Tarihi:

9/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001325225

pISSN:

2458-973X