A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Spent foundry sand used in flowable materials for backfilling excavations
This work was carried out to evaluate tile use of foundry sand on physical properties of flowable slurry. Two different flowable slurry mixtures were proportioned for strength levels in the range of 0.34 to 0.69 MPa (50 to 100 psi) at 28 days using two different sources of foundry sand and ASTM Class F fly ash. Flowable slurry mixtures containing fly ash from two different sources, without any foundry sand, were used as reference mixtures for this investigation. For each reference mixture, additional mixtures incorporating clean and used foundry sands as a replacement of fly ash were also proportioned. These flowable mixtures made with and without foundry sand were evaluated for bleeding, depth of nail penetration, settlement, shrinkage, condition of set, etc. In general, increased with an increase in water or foundry sand content of the mixtures tested. The settlement decreased with a decrease in water content of the slurry. All the test specimens showed no sign of shrinkage cracks. The depth of nail penetration decreased with age or water content. Compressive strengths of the test mixtures were found to vary between 0.27 to 0.62 MPa (40 to 90 psi) at 28 days. The overall results showed that excavatable flowable slurry with desirable physical properties call be manufactured using foundry sand as a replacement of fly ash up to 85 %. (The presentation is based on previously published material. Further three papers are included)
Spent foundry sand used in flowable materials for backfilling excavations
This work was carried out to evaluate tile use of foundry sand on physical properties of flowable slurry. Two different flowable slurry mixtures were proportioned for strength levels in the range of 0.34 to 0.69 MPa (50 to 100 psi) at 28 days using two different sources of foundry sand and ASTM Class F fly ash. Flowable slurry mixtures containing fly ash from two different sources, without any foundry sand, were used as reference mixtures for this investigation. For each reference mixture, additional mixtures incorporating clean and used foundry sands as a replacement of fly ash were also proportioned. These flowable mixtures made with and without foundry sand were evaluated for bleeding, depth of nail penetration, settlement, shrinkage, condition of set, etc. In general, increased with an increase in water or foundry sand content of the mixtures tested. The settlement decreased with a decrease in water content of the slurry. All the test specimens showed no sign of shrinkage cracks. The depth of nail penetration decreased with age or water content. Compressive strengths of the test mixtures were found to vary between 0.27 to 0.62 MPa (40 to 90 psi) at 28 days. The overall results showed that excavatable flowable slurry with desirable physical properties call be manufactured using foundry sand as a replacement of fly ash up to 85 %. (The presentation is based on previously published material. Further three papers are included)
Spent foundry sand used in flowable materials for backfilling excavations
Verwendung von Altformstoffen in Fließbeton zum Auffüllen von Baugruben
Naik, T. (author) / Singh, S.S. (author)
1996
32 Seiten, 9 Bilder, 9 Tabellen, 17 Quellen
Conference paper
English
Backfilling Trench Excavations
| NTIS | 1971
Flowable fill solves pipe backfilling problems
| British Library Conference Proceedings | 1997
Permeability of Flowable Slurry Materials Containing Foundry Sand and Fly Ash
| British Library Online Contents | 1997
Permeability of Flowable Slurry Materials Containing Foundry Sand and Fly Ash
| Online Contents | 1997
Design of Flowable Fill: Waste Foundry Sand as a Fine Aggregate
| British Library Online Contents | 1996