Experimental Study on Stabilization of Soft Subgrade Soil with Concrete Fine Fraction Waste

EasyChair Preprint no. 4084

Abstract

The reuse of construction and demolition waste (CDW) is a sustainable practice that in recent years has been investigated with great intensity around the world. Concrete residues are a part of the CDW, whose application in pavements is still under development. In this context, this article aims to evaluate the use of concrete fine fraction waste (CW-fine), with particles smaller than 2mm, to improve a soft subgrade soil of residual origin. For this purpose, their physical characteristics, the compaction and California Bearing Ratio (CBR) have been analyzed, both of the natural soil and of the mixtures with CD-fine in proportions of 20, 40 and 60% by weight. The results show that when adding CD-fine, the values of the Atterberg limits, the specific masses of the solids, the optimum moisture content and the expansion decrease; while the maximum dry density and CBR increase. The expansion and CBR results of the soil mixture with CW-fine show acceptable values for the subgrade reinforcement, in accordance with Brazilian paving standards.

Keyphrases: California Bearing Ratio, Concrete fine fraction waste, Soft Subgrade Soil, subgrade stabilization

@Booklet{EasyChair:4084,
  author = {Sara del Rocio Ochoa Averos and Julio César Bizarreta-Ortega},
  title = {Experimental Study on Stabilization of Soft Subgrade Soil with Concrete Fine Fraction Waste},
  howpublished = {EasyChair Preprint no. 4084},

  year = {EasyChair, 2020}}