Effects of field stockpiling on leaching calcareous constituents from recycled concrete aggregate to be used as unbound base course/subbase material

Aiyoub ABBASPOUR; Burak TANYU

Makale detayları

Effects of field stockpiling on leaching calcareous constituents from recycled concrete aggregate to be used as unbound base course/subbase material

Yazarlar:

Aiyoub ABBASPOUR | Burak TANYU

Yayıncı:

Süleyman Demirel University

Ana Başlıklar:

Kara ve demiryolu mühendisliği

Dergi:

Journal of Innovative Transportation 2020 Vol.1 Issue 2

Belge Tipi:

Makale

Yayın Tarihi:

12/2020

Belge Dili:

İngilizce

Document ID (Org No.):

2000483316

Sıklık:

İki Yıllık

eISSN:

2717-8889

Özet:

 

Understanding the potential of recycled concrete aggregate (RCA) to precipitate calcareous constituents requires investigating the changes in solid and liquid chemistry of material throughout its service life including the stockpiling period. This study focuses on stockpiling freshly produced RCA in the field and monitoring the changes in concentrations of calcium and sulfur (as dominant ions), as well as pH, total dissolved solids, and carbonate content for about two years. The results showed that the carbonate content of solid particles increases with time, which causes a noticeable reduction in total dissolved solids in the leachate. Aging also slightly decreases the pH; however, this decrease is very slow. The leached concentration of calcium showed a noticeable reduction with aging, indicating the effect of the formation of secondary carbonated minerals with lower solubility than calcium hydroxide and calcium-silicate-hydrate. On the contrary, sulfur (S) release (which is leached as sulfate ion) showed little effect of aging and carbonation process on the long-term leaching of S. The results obtained from the aging of the field RCA pile created in this study were also compared with the previously published laboratory aging of RCA and the comparison provided evidence supporting the field observations.

Makale detayları

Effects of field stockpiling on leaching calcareous constituents from recycled concrete aggregate to be used as unbound base course/subbase material

Yazarlar: Aiyoub ABBASPOUR | Burak TANYU

Yayıncı: Süleyman Demirel University

Ana Başlıklar: Kara ve demiryolu mühendisliği

Dergi: Journal of Innovative Transportation 2020 Vol.1 Issue 2

Belge Tipi: Makale

Yayın Tarihi: 12/2020

Belge Dili: İngilizce

Document ID (Org No.): 2000483316

Sıklık: İki Yıllık

eISSN: 2717-8889

Sayı

Yazarlar:

Aiyoub ABBASPOUR | Burak TANYU

Yayıncı:

Süleyman Demirel University

Ana Başlıklar:

Kara ve demiryolu mühendisliği

Dergi:

Journal of Innovative Transportation 2020 Vol.1 Issue 2

Belge Tipi:

Makale

Yayın Tarihi:

12/2020

Belge Dili:

İngilizce

Document ID (Org No.):

2000483316

Sıklık:

İki Yıllık

eISSN:

2717-8889