Investigation of Usability of Sepiolite as a Pozzolan in Production of High Performance Cementitious Composites

Rasim Cem Saka; Serkan Subaşı

Article Details

Investigation of Usability of Sepiolite as a Pozzolan in Production of High Performance Cementitious Composites

Authors:

Rasim Cem Saka | Serkan Subaşı

Publisher:

Sakarya University

Main Topics:

Civil Engineering

Journal:

Sakarya University Journal of Science Vol.28 Issue 3, pp.480-495

Document Type:

Article

Publication Date:

6/2024

Document Language:

English

Document ID (Org No.):

2001318000

pISSN:

2147-835X

Keywords:

Abstract:

 The continuous growth of population and urbanization in the world significantly increases the demand for cement. In terms of sustainability, the cement industry needs to develop new and effective pozzolans with the appropriate recycling of alternative raw materials. It is also important to evaluate sepiolite, which has very limited resources in the world compared to other industrial minerals and whose economic deposits are limited to Spain and Türkiye. In this study, the usability of sepiolite as a pozzolan in cement and its effects on physical, mechanical and durability properties were investigated. First of all, the chemical and physical properties of sepiolite in Eskisehir region were investigated. Crude and ground sepiolite calcined at 500 ºC, 700 ºC and 900ºC were substituted for CEM I 42.5 R class standard Portland cement at 5-10-15 and 20 ratios. The pozzolanic activities of produced sepiolite substituted cement were determined according to ASTM C-311. As a result, crude sepiolite retains more water than calcined sepiolite, thus negatively affecting the strength properties of the concrete. Additionally, sepiolite is considered suspicious harmful-harmless in terms of alkali silica reactivity except 10-15-20 crude sepiolite substitutions. Overall, It has been observed that sepiolite does not have sufficient pozzolanic properties in cementitious composites.

 The continuous growth of population and urbanization in the world significantly increases the demand for cement. In terms of sustainability, the cement industry needs to develop new and effective pozzolans with the appropriate recycling of alternative raw materials. It is also important to evaluate sepiolite, which has very limited resources in the world compared to other industrial minerals and whose economic deposits are limited to Spain and Türkiye. In this study, the usability of sepiolite as a pozzolan in cement and its effects on physical, mechanical and durability properties were investigated. First of all, the chemical and physical properties of sepiolite in Eskisehir region were investigated. Crude and ground sepiolite calcined at 500 ºC, 700 ºC and 900ºC were substituted for CEM I 42.5 R class standard Portland cement at 5-10-15 and 20 ratios. The pozzolanic activities of produced sepiolite substituted cement were determined according to ASTM C-311. As a result, crude sepiolite retains more water than calcined sepiolite, thus negatively affecting the strength properties of the concrete. Additionally, sepiolite is considered suspicious harmful-harmless in terms of alkali silica reactivity except 10-15-20 crude sepiolite substitutions. Overall, It has been observed that sepiolite does not have sufficient pozzolanic properties in cementitious composites.

 The continuous growth of population and urbanization in the world significantly increases the demand for cement. In terms of sustainability, the cement industry needs to develop new and effective pozzolans with the appropriate recycling of alternative raw materials. It is also important to evaluate sepiolite, which has very limited resources in the world compared to other industrial minerals and whose economic deposits are limited to Spain and Türkiye. In this study, the usability of sepiolite as a pozzolan in cement and its effects on physical, mechanical and durability properties were investigated. First of all, the chemical and physical properties of sepiolite in Eskisehir region were investigated. Crude and ground sepiolite calcined at 500 ºC, 700 ºC and 900ºC were substituted for CEM I 42.5 R class standard Portland cement at 5-10-15 and 20 ratios. The pozzolanic activities of produced sepiolite substituted cement were determined according to ASTM C-311. As a result, crude sepiolite retains more water than calcined sepiolite, thus negatively affecting the strength properties of the concrete. Additionally, sepiolite is considered suspicious harmful-harmless in terms of alkali silica reactivity except 10-15-20 crude sepiolite substitutions. Overall, It has been observed that sepiolite does not have sufficient pozzolanic properties in cementitious composites.

 The continuous growth of population and urbanization in the world significantly increases the demand for cement. In terms of sustainability, the cement industry needs to develop new and effective pozzolans with the appropriate recycling of alternative raw materials. It is also important to evaluate sepiolite, which has very limited resources in the world compared to other industrial minerals and whose economic deposits are limited to Spain and Türkiye. In this study, the usability of sepiolite as a pozzolan in cement and its effects on physical, mechanical and durability properties were investigated. First of all, the chemical and physical properties of sepiolite in Eskisehir region were investigated. Crude and ground sepiolite calcined at 500 ºC, 700 ºC and 900ºC were substituted for CEM I 42.5 R class standard Portland cement at 5-10-15 and 20 ratios. The pozzolanic activities of produced sepiolite substituted cement were determined according to ASTM C-311. As a result, crude sepiolite retains more water than calcined sepiolite, thus negatively affecting the strength properties of the concrete. Additionally, sepiolite is considered suspicious harmful-harmless in terms of alkali silica reactivity except 10-15-20 crude sepiolite substitutions. Overall, It has been observed that sepiolite does not have sufficient pozzolanic properties in cementitious composites.

Article Details

Investigation of Usability of Sepiolite as a Pozzolan in Production of High Performance Cementitious Composites

Authors:

Rasim Cem Saka | Serkan Subaşı

Publisher:

Sakarya University

Main Topics:

Civil Engineering

Journal:

Sakarya University Journal of Science Vol.28 Issue 3, pp.480-495

Document Type:

Article

Publication Date:

6/2024

Document Language:

English

Document ID (Org No.):

2001318000

pISSN:

2147-835X

Sepiolite

Pozzolanic activity

Calcination

StrengthSepiolite; Pozzolanic Activity; Calcination; Strengt

Issues

Article Details

Investigation of Usability of Sepiolite as a Pozzolan in Production of High Performance Cementitious Composites

Authors: Rasim Cem Saka | Serkan Subaşı

Publisher: Sakarya University

Main Topics: Civil Engineering

Journal: Sakarya University Journal of Science Vol.28 Issue 3, pp.480-495

Document Type: Article

Publication Date: 6/2024

Document Language: English

Document ID (Org No.): 2001318000

pISSN: 2147-835X

Sepiolite

Pozzolanic activity

Calcination

StrengthSepiolite; Pozzolanic Activity; Calcination; Strengt

Issues

Authors:

Rasim Cem Saka | Serkan Subaşı

Publisher:

Sakarya University

Main Topics:

Civil Engineering

Journal:

Sakarya University Journal of Science Vol.28 Issue 3, pp.480-495

Document Type:

Article

Publication Date:

6/2024

Document Language:

English

Document ID (Org No.):

2001318000

pISSN:

2147-835X