Ontürk, K. Sakarya Üniversitesi - Geyve Meslek Yüksekokulu - Mimari Restorasyon Bölümü, Türkiye , Firat, S. Gazi Üniversitesi - Teknoloji Fakültesi - İnşaat Mühendisliği Bölümü, Türkiye , Vural, I. Sakarya Üniversitesi - Teknoloji Fakültesi - İnşaat Mühendisliği Bölümü, Türkiye , Khatib, J. M. Wolverhampton Üniversitesi - Mühendislik ve Fen Bilimleri Fakültesi - İnşaat Mühendisliği Bölümü

Improvement of Road Sub-base Fill by Using Waste Marble Dust and Fly Ash

29366

Solid waste materials have become one of the important environmental concerns in the world. Huge amounts of waste materials and industrial by-products are generated from manufacturing processes and other processes. Utilization of waste materials and by-products is now a necessity for sustainable development and better living environment. Large volumes of earthen materials are used in construction each year in Turkey and elsewhere in the world. Also, sub-base filling materials are a common problem for highway construction in many parts of the world. Large amount of wastes have the potential to be used in the mixtures of the road sub-base filling materials in appropriate proportions. The usual approach for sub-base stabilization is to remove the low-bearing capacity materials, and replace with a high-bearing capacity material. One alternative method is to improve the low grade materials by (e.g. waste material) stabilization. In this study, the unconfined compressive strength and stiffness of base layers stabilized using industrial wastes, namely fly ash and marble dust areinvestigated. They were added in different ratios of 5%, 10 %, and 15% into natural soils for assessment of their possible use in highway base construction. The samples were cured for 7 and 14 days. Standard compaction and California Bearing Ratio (CBR) values weredetermined for all mixed samples at the two curing ages. The addition of wastematerials (i.e. fly ash and marble dust) to the soil showed an enhancement to the CBR values.

35

Fly ash , California bearing ratio (CBR) , marble dust , unconfined compressive strength , waste materials

Journal Of Polytechnic

42