An Experimental Investigation on Strength Behavior of Recycled Fine Aggregate (RCFA)-Treated Compacted Clayey Soils


Kishko H., Kutlu Z. N., Şenol A., Pehlivan A. O.

Proceedings of the 3rd International Conference on Environmental Geotechnology, Recycled Waste Materials and Sustainable Engineering (EGRWSE 2022), İzmir, Turkey, 15 - 17 September 2022, vol.370 LNCE, pp.361-368 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 370 LNCE
  • Doi Number: 10.1007/978-981-99-4041-7_33
  • City: İzmir
  • Country: Turkey
  • Page Numbers: pp.361-368
  • Keywords: Compacted clays, Recycled fine aggregate, Soil stabilization, Treatment parameters
  • Istanbul Technical University Affiliated: Yes

Abstract

In geotechnical engineering applications, soils that exhibit plastic behavior over wide ranges of moisture content and liquid limits have the potential of low bearing capacity, settlement and potential of swelling/shrinking where they are generally considered to be as problematic soils. Although the compacted soils are commonly used in geotechnical engineering practice, compacted fine grained soils are not commonly preferred to be used for earthworks due to this plasticity in nature associated with complex hydro-mechanical behavior. Practicing engineers rely on using variety of design, construction and stabilization techniques to reduce these potential problems. In this aspect, promoting the use of recycled waste materials as improvement techniques and to make compacted fine grained soils usable by means of a stabilization becomes an important issue towards both for; proposing sustainable solutions and also sustainability for the construction of large infrastructures. Within scope of this study, shear strength properties for short term stability of compacted fine grained soils were tested to examine the convenience of adding—recycled concrete fine aggregates—for soil stabilization purpose to overcome these problems. The recycled concrete fine aggregates can be considered as a new material which were produced from crushing ready mix C16 concrete cast in 1250 × 2500 mm framework and after a curing period of 90 days. After crushing process, both coarse and fine aggregates were acquired. Since generally recycled coarse aggregates were used in structural concrete applications, only recycled fine aggregates were facilitated in soil stabilization. This paper gives a brief summary of the results of ongoing research on the shear strength behavior of non-treated and treated low plasticity clayey soil, emphasizing the effects of treatment parameters as: percent by weight of fine aggregate, and curing time. The results for the experimental analysis are reported showing the effect of fine aggregate addition on the strength behavior of compacted fine grained soil for relevant engineering applications.