Effect of sand equivalent (SE) on strength of soil-cement-fibre matrix

Milad Tajdini¹ Hosein Shojaei² Amirreza Rahimi³

1) 1. Ph.D. in Geotechnical engineering Tabriz university
2) Ms.C. Student Geotechnical engineering KNTU
3) Ms.C. Student Geotechnical engineering KNTU

Publication : 2nd International Conference on Recent Advances in Engineering, Innovation and Technology - Belgium(eitconf.com)
Abstract :
Soil–cement is a mixture of Portland cement, soil and water that sticks together due to the hydration of the cement and compression of its components to create a dense, durable compound, which has low permeability and is resistant to erosion. Unfortunately, these mixtures do not perform well under tensile load because soil–cement materials are brittle. In this study, three types of fibres were used to reinforce the materials to compensate for this flaw: jute, polypropylene, and steel fibres. These fibres were randomly added to the soil– cement mixture in three percentages (1, 2, and 3%). Tests were then conducted on three different soil–cement gradations each with three fine contents of different mineral types . First, sand equivalent and Atterberg limits were conducted on the soil samples. Then indirect tensile strength and flexural tests were conducted on the soil–cement samples in two conditions: control (unreinforced) and reinforced soil–cement samples. Results showed an undeniable role of fibres in changing the behaviour of the soil–cement–fibre matrix from brittle to ductile producing post-peak behaviour.
Keywords : Keywords: Soil–cement Tensile strength Flexural strength fibres.