Strength and Durability Performance of Hybrid Alkaline Clay Brick Waste –Coconut Shell Ash Cement

Festus Ngui; Mike Otieno

Makale detayları

Strength and Durability Performance of Hybrid Alkaline Clay Brick Waste –Coconut Shell Ash Cement

Yazarlar:

Festus Ngui | Mike Otieno

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Construction Materials

Dergi:

Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 4, pp.374-390

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001333496

pISSN:

2458-973X

Anahtar kelimeler:

Özet:

 Hybrid Alkaline Cement HAC has the potential to reduce carbon dioxide CO2 and improve concrete structure. The durability of a hybrid alkaline mortar made from a mixture of calcined clay brick waste CBW and coconut shell ash CSA was compared with that of ordinary Portland cement OPC and pozzolanic Portland cement PPC, which are the two common types of Portland cement. In an open furnace, CSA was obtained by burning coconut shells collected from Kilifi County, Kenya. At the same time, CBW was sampled from brick production and construction sites in Kibwezi sub-county, Kenya, and ground using a laboratory ball mill. Various cement blends were prepared by mixing different mass ratios of OPC:CSA: CBW and activated with 0.5 M and 2 M Sodium sulfate solutions, maintaining a solution-to-cement ratio of 0.5. Control mortar prisms were cast using distilled water and cured in distilled water. Principle Component Analysis PCA was used for correlation analysis. Compressive strength development, water sorptivity, Porosity, oxygen permeability index, and thermal resistance were investigated for durability properties. Accelerated chloride ingress and chloride ion diffusion coefficients were determined. Results show that alkali-activated samples exhibited lower sorptivity, Porosity, chloride ingress, and higher compressive strength, oxygen permeability index, and thermal resistance than the cement mix prepared with water. The mix designs 5-1-4, 5-4-1, 3-1-6, and 3-6-1 demonstrated a decreasing optimum performance comparable to OPC in that order. The formulation 5-1-4, prepared with 2 M Sodium sulfate, showed the highest durability in all tests. Moreover, mortar durability was highly influenced by the amount of cement substituted, the kind of precursor, and the concentration of alkali activator.

 Hybrid Alkaline Cement HAC has the potential to reduce carbon dioxide CO2 and improve concrete structure. The durability of a hybrid alkaline mortar made from a mixture of calcined clay brick waste CBW and coconut shell ash CSA was compared with that of ordinary Portland cement OPC and pozzolanic Portland cement PPC, which are the two common types of Portland cement. In an open furnace, CSA was obtained by burning coconut shells collected from Kilifi County, Kenya. At the same time, CBW was sampled from brick production and construction sites in Kibwezi sub-county, Kenya, and ground using a laboratory ball mill. Various cement blends were prepared by mixing different mass ratios of OPC:CSA: CBW and activated with 0.5 M and 2 M Sodium sulfate solutions, maintaining a solution-to-cement ratio of 0.5. Control mortar prisms were cast using distilled water and cured in distilled water. Principle Component Analysis PCA was used for correlation analysis. Compressive strength development, water sorptivity, Porosity, oxygen permeability index, and thermal resistance were investigated for durability properties. Accelerated chloride ingress and chloride ion diffusion coefficients were determined. Results show that alkali-activated samples exhibited lower sorptivity, Porosity, chloride ingress, and higher compressive strength, oxygen permeability index, and thermal resistance than the cement mix prepared with water. The mix designs 5-1-4, 5-4-1, 3-1-6, and 3-6-1 demonstrated a decreasing optimum performance comparable to OPC in that order. The formulation 5-1-4, prepared with 2 M Sodium sulfate, showed the highest durability in all tests. Moreover, mortar durability was highly influenced by the amount of cement substituted, the kind of precursor, and the concentration of alkali activator.

 Hybrid Alkaline Cement HAC has the potential to reduce carbon dioxide CO2 and improve concrete structure. The durability of a hybrid alkaline mortar made from a mixture of calcined clay brick waste CBW and coconut shell ash CSA was compared with that of ordinary Portland cement OPC and pozzolanic Portland cement PPC, which are the two common types of Portland cement. In an open furnace, CSA was obtained by burning coconut shells collected from Kilifi County, Kenya. At the same time, CBW was sampled from brick production and construction sites in Kibwezi sub-county, Kenya, and ground using a laboratory ball mill. Various cement blends were prepared by mixing different mass ratios of OPC:CSA: CBW and activated with 0.5 M and 2 M Sodium sulfate solutions, maintaining a solution-to-cement ratio of 0.5. Control mortar prisms were cast using distilled water and cured in distilled water. Principle Component Analysis PCA was used for correlation analysis. Compressive strength development, water sorptivity, Porosity, oxygen permeability index, and thermal resistance were investigated for durability properties. Accelerated chloride ingress and chloride ion diffusion coefficients were determined. Results show that alkali-activated samples exhibited lower sorptivity, Porosity, chloride ingress, and higher compressive strength, oxygen permeability index, and thermal resistance than the cement mix prepared with water. The mix designs 5-1-4, 5-4-1, 3-1-6, and 3-6-1 demonstrated a decreasing optimum performance comparable to OPC in that order. The formulation 5-1-4, prepared with 2 M Sodium sulfate, showed the highest durability in all tests. Moreover, mortar durability was highly influenced by the amount of cement substituted, the kind of precursor, and the concentration of alkali activator.

 Hybrid Alkaline Cement HAC has the potential to reduce carbon dioxide CO2 and improve concrete structure. The durability of a hybrid alkaline mortar made from a mixture of calcined clay brick waste CBW and coconut shell ash CSA was compared with that of ordinary Portland cement OPC and pozzolanic Portland cement PPC, which are the two common types of Portland cement. In an open furnace, CSA was obtained by burning coconut shells collected from Kilifi County, Kenya. At the same time, CBW was sampled from brick production and construction sites in Kibwezi sub-county, Kenya, and ground using a laboratory ball mill. Various cement blends were prepared by mixing different mass ratios of OPC:CSA: CBW and activated with 0.5 M and 2 M Sodium sulfate solutions, maintaining a solution-to-cement ratio of 0.5. Control mortar prisms were cast using distilled water and cured in distilled water. Principle Component Analysis PCA was used for correlation analysis. Compressive strength development, water sorptivity, Porosity, oxygen permeability index, and thermal resistance were investigated for durability properties. Accelerated chloride ingress and chloride ion diffusion coefficients were determined. Results show that alkali-activated samples exhibited lower sorptivity, Porosity, chloride ingress, and higher compressive strength, oxygen permeability index, and thermal resistance than the cement mix prepared with water. The mix designs 5-1-4, 5-4-1, 3-1-6, and 3-6-1 demonstrated a decreasing optimum performance comparable to OPC in that order. The formulation 5-1-4, prepared with 2 M Sodium sulfate, showed the highest durability in all tests. Moreover, mortar durability was highly influenced by the amount of cement substituted, the kind of precursor, and the concentration of alkali activator.

Makale detayları

Strength and Durability Performance of Hybrid Alkaline Clay Brick Waste –Coconut Shell Ash Cement

Yazarlar:

Festus Ngui | Mike Otieno

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Construction Materials

Dergi:

Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 4, pp.374-390

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001333496

pISSN:

2458-973X

Alkali activator

clay brick waste

coconut shell ash

durability

hybrid alkaline mortar

sodium sulphate

Sayı

Makale detayları

Strength and Durability Performance of Hybrid Alkaline Clay Brick Waste –Coconut Shell Ash Cement

Yazarlar: Festus Ngui | Mike Otieno

Yayıncı: Yildiz Technical University

Ana Başlıklar: Construction Materials

Dergi: Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 4, pp.374-390

Belge Tipi: Makale

Yayın Tarihi: 12/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001333496

pISSN: 2458-973X

Alkali activator

clay brick waste

coconut shell ash

durability

hybrid alkaline mortar

sodium sulphate

Sayı

Yazarlar:

Festus Ngui | Mike Otieno

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Construction Materials

Dergi:

Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 4, pp.374-390

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001333496

pISSN:

2458-973X