İNŞAAT ATIKLARININ YERALTI MADENİ ÜRETİM BOŞLUKLARINDA DOLGU MALZEMESİ OLARAK KULLANIMI

Abstract

Bu çalışmada sülfürlü atık yerine ikame olarak %10, %30 ve %50 oranlarında inşaat atığı (İA) kullanılarak hazırlanan çimentolu macun dolgu (ÇMD) numunelerinin 3-28 gün boyunca tek eksenli basınç dayanımı (TEBD) ve 28 gün sonunda porozite (MIP) testleri yapılarak İA’nın macun dolgu malzemesi olarak kullanımı araştırılmıştır. Kontrol numuneleri %7,5 ve %8,5 bağlayıcı oranında hazırlanırken, İA ikameli ÇMD numuneleri %7,5 çimento oranında hazırlanmıştır. Bulgular, %10 İA ikameli ÇMD numunelerinin %7,5 ve %8,5 bağlayıcı oranında hazırlanan kontrol numunelerine kıyasla daha yüksek TEBD ve daha düşük porozite üretirken, daha yüksek oranlarda (%30-50) İA kullanımının dolgunun dayanım ve mikroyapı performansını olumsuz etkilediğini göstermiştir. Ayrıca, 1,0 m3 ÇMD üretiminde bağlayıcı oranı %7,5’e düşürülüp atık malzeme yerine %10 İA ikame edildiğinde %13,22 oranında bağlayıcı tasarrufu sağlanmıştır. Sonuç olarak, İA’nın yeraltı üretim boşluklarında ÇMD malzemesi olarak kullanılabileceği ve yerüstünde oluşabilecek toz, görüntü kirliliği ve depolama alanı yetersizliği vb. problemlerin ortadan kaldırılabileceği/azaltılabileceği öngörülmüştür.

Keywords

• İnşaat Atığı,Sülfürlü Atık,Basınç Dayanımı,Porozite,Çimentolu Macun Dolgu

Utilisation of Construction and Demolition Waste as Backfill Material in Underground Mine Openings

Abstract

In this study, cemented paste backfill (CPB) samples were prepared using the construction and demolition waste (CDW) at 10, 30 and 50 wt.% of replacement ratios to sulphide mine tailings. The unconfined compressive strength (UCS) and porosity (MIP) tests of these samples were practiced at 3-28 days and only 28 days, respectively and the utilization of CDW as paste backfill material were investigated. CPB samples of control were prepared at two different binder dosage (7.5 and 8.5 wt.%), whilst, the other samples substituting CDW were produced at cement dosage of 7.5 wt.%. Findings demonstrated that CPB samples having 10 wt.% CDW produced higher UCS and lower porosity than control samples produced at those binder dosage, whilst, the utilisation of higher replacement ratios of CDW (30-50% byweight) adversely affected the strenght and microstructure performances of paste backfill. When 10 wt.% CDW material to sulphide tailings was also replaced to produce 1.0 m3 CPB at 7.5 wt.% of binder dosage, the binder saving of 13.22% was obtained. As a conclusion, it was foreseen that the CDW can be utilized as CPB material in stopes of underground mine and the problems as dust, visual pollution and inadequancy of storage site etc. which may be occurred in surface can be elliminated or minimised.

References

1. ASTM C39/C39M- 16b, 2016,“Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens”, Annual Book of ASTM Standards, American Society of Testing Material.
2. ASTM D4404-10, 2010, “Standard test method for determination of pore volume and pore volume distribution of soil and rock by mercury intrusion porosimetry”, Annual book of ASTM Standards, American Society of Testing Material.
3. Bestgen, J., Cetin, B., Tanyu, B.F., 2016, “Effects of Extraction Methods and Factors Leaching of Metals from Recycled Concrete Aggregates”, Environmental Science and Pollution Research, Vol. 23, No. 13, pp. 12983-13002.
4. Chen, J., Bradshaw, S., Benson, C.H., Tinjum, J.M., Edil, T.B., “pH-dependent Leaching of Trace Elements from Recycled Concrete Aggregate”, In GeoCongress 2012: State of the Art and Practice in Geotechnical Engineering, Oakland, California, USA, 3729-3738, 25-29 March 2012.
5. Chen, Q., Zhang, Q., Qi, C., Fourie, A., Xiao, C., 2018, “Recycling Phosphogypsum and Construction Demolition Waste for Cemented Paste Backfill and its Environmental Impact”, Journal of Cleaner Production, Vol. 186, pp. 418-429.
6. Cihangir, F., Akyol, Y., 2018, “Mechanical, Hydrological and Microstructural Assessment of the Durability of Cemented Paste Backfill Containing Alkali-activated Slag”, International Journal of Mining, Reclamation and Environment, Vol. 32, No. 2, pp. 123-143.
7. Çakır, Ö., 2014, “Experimental Analysis of Properties of Recycled Coarse Aggregate (RCA) Concrete with Mineral Additives”, Construction and Building Materials, Vol. 68, pp. 17-25.
8. Dominguez, A., Dominguez, M.I., Ivanova, S., Centeno, M.A., Odriozola, J.A., 2016, “Recycling of Construction and Demolition Waste Generated by Building Infrastructure for the Production of Glassy Materials”, Ceramics International, Vol. 42, No. 14, pp. 15217–15223.

9. Engelsen, C.J., Van Der Sloot, H.A., Wibetoe, G., Petkovic, G., Stoltenberg-Hansson, E., Lund, W., 2009, “Release of Major Elements from Recycled Concrete Aggregates and Geochemical Modelling”, Cement and Concrete Research, Vol. 39, No. 5, pp. 446–459.
10. Ercikdi, B., Baki, H., İzki, M., 2013, “Effect of Desliming of Sulphide-rich Mill Tailings on the Long-term Strength of Cemented Paste Backfill”, Journal of Environmental Management, Vol. 115, pp. 5-13.
11. European Commission (DG ENV), “Final Report Task Service Contract on Management of Construction and Demolition Waste”, (ENV.G.4/FRA/2008/0112), 2011.
12. Evangelista, L., De Brito, J., 2007, “Mechanical Behaviour of Concrete Made with Fine Recycled Concrete Aggregates”, Cement and Concrete Composites, Vol. 29, No. 5, pp. 397-401.
13. Everett, D.H., 1972, “IUPAC Manual of Symbols and Terminology”, Appendix 2, Part 1, Colloid and Surface Chemistry, Pure and Applied Chemistry, Vol. 31, pp. 578-621.
14. Jones, S.N., Cetin, B., 2017, “Evaluation of Waste Materials for Acid Mine Drainage Remediation”, Fuel, Vol. 188, pp. 294-309.
15. Indraratna, B., Regmi, G., Nghiem, L., Golab, A., 2010, “Performance of a PRB for the Remediation of Acidic Groundwater in Acid Sulfate Soil Terrain”, Journal of Geotechnical and Geoenvironmental Engineering, Vol. 136, No. 7, pp. 897-906.
16. Karaca, F.M., “İstanbul Tuzla-Aydınlı İnşaat ve Yıkıntı Atıkları Geri Kazanım Tesisi İşletimi”, Atık Yönetimi Sempozyumu, Antalya, Türkiye, 12-28,24-26 Nisan 2012.
17. Katz, A., 2003, “Properties of Concrete Made with Recycled Aggregate from Partially Hydrated Old Concrete”, Cement and Concrete Research, Vol. 33, pp. 703-711.
18. Kesimal, A., Yilmaz, E., Ercikdi, B., Alp, I., Deveci, H., 2005, “Effect of Properties of Tailings and Binder on the Short-and Long-term Strength and Stability of Cemented Paste Backfill”, Materials Letters, Vol. 59, No. 28, pp. 3703-3709.
19. Kou, S.C., Poon, C.S., Etxeberria, M., 2011, “Influence of Recycled Aggregates on Long Term Mechanical Properties and Pore Size Distribution of Concrete”, Cement and Concrete Composites, Vol. 33, No. 2, pp. 286-291.
20. Özalp, F., Yilmaz, H.D., Kara, M., Kaya, Ö., Şahin, A., 2016, “Effects of Recycled Aggregates from Construction and Demolition Wastes on Mechanical and Permeability Properties of Paving Stone, Kerb and Concrete Pipes”, Construction and Building Materials, Vol. 110, pp. 17-23.
21. Tabsh, S.W., Abdelfatah, A.S., 2009, “Influence of Recycled Concrete Aggregates on Strength Properties of Concrete” Construction and Building Materials, Vol. 23, No. 2, pp. 1163-1167.
22. Thomas, C., Setien, J., Polanco, J.A., Alaejos, P., Sanchez De Juan, M., 2013, “Durability of Recycled Aggregate Concrete”, Construction and Building Materials, Vol. 40, pp. 1054-1065.
23. Topçu, I.B., Şengel, S., 2004, “Properties of Concretes Produced with Waste Concrete Aggregate”, Cement and Concrete Research, Vol. 34, No. 8, pp. 1307-1312.
24. Uygunoğlu, T., Topçu, İ.B., Çelik, A.G., 2014, “Use of Waste Marble and Recycled Aggregates in Self-compacting Concrete for Environmental Sustainability”, Journal of Cleaner Production, Vol. 84, pp. 691-700.
25. Yılmaz, T., Ercikdi, B., Deveci, H., 2018, “Utilisation of Construction and Demolition Waste as Cemented Paste Backfill Material for Underground Mine Openings”, Journal of Environmental Management, Vol. 222, pp. 250-259.
26. Yilmaz, E., Guresci, M., 2017, “Design and Characterization of Underground Paste Backfill”,Paste Tailings Management, Editor: Yilmaz. E., Fall,M., Springer International Publishing, Cham/Switzerland, 111-144.
27. Yumlu, M., “Backfill Practices at Cayeli Mine”, Proceedings of the International Mining Conference, Ankara, Turkey, 333–339, 19-22 June 2001.
28. Zheng, J., Zhu, Y., Zhao, Z., 2016, “Utilization of Limestone Powder and Water-reducing Admixture in Cemented Paste Backfill of Coarse Copper Mine Tailings”, Construction and Building Materials, Vol. 124, pp. 31-36.