Hydraulic and mechanical properties of wax-coated sands
来源期刊：中南大学学报(英文版)2013年第12期
论文作者：Jesmani Mehrab Bardet Jean-Pierre Jabbari Nima Kamalzare Mehrad
文章页码：3667 - 3675
Key words：wax-coated sand; confined compression coefficient; permeability; compressibility; stress-strain behavior
Abstract: Wax-coated sands are a new category of synthetic soils, which are gradually becoming a reliable construction material. Because of their valuable drainage ability and mechanical properties, wax coated sandy soils are specifically applicable to pavement construction of horseracing tracks and sport fields. Although the mechanical and hydraulic properties of these synthetic soils are well-proven, there is still a lack of studies on how the soil samples behave differently when mixing with different wax fractions. Adding the wax affects permeability and compressibility of pure sand. Intensity of influences is a function of weight percentage of wax that has been added, and other physical and environmental factors. The effects of wax content on hydraulic properties (permeability), and mechanical properties (stress-strain behavior, compressibility) of sandy soils based on a series of experimental efforts were investigated. Obtained experimental results infer that increasing the amount of wax up to 6% causes an about 50% increase in permeability, mainly because of the significant effect of wax in lowering the friction along with covering and filling the angular parts of particles’ surfaces and forming rounded particles. In addition, wax-coated sands show a 20% to 60% decrease in confined compression modulus compared to non wax-coated sands.
Jesmani Mehrab1, 2, Bardet Jean-Pierre2, Jabbari Nima2, Kamalzare Mehrad3
(1. Department of Civil Engineering, Imam Khomeini International University, Qazvin 34149, Iran;
2. Sonny Astani Department of Civil and Environmental Engineering, Viterbi School of Engineering, Los Angeles 91007, USA;
3. Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, New York 12180, USA)
Abstract:Wax-coated sands are a new category of synthetic soils, which are gradually becoming a reliable construction material. Because of their valuable drainage ability and mechanical properties, wax coated sandy soils are specifically applicable to pavement construction of horseracing tracks and sport fields. Although the mechanical and hydraulic properties of these synthetic soils are well-proven, there is still a lack of studies on how the soil samples behave differently when mixing with different wax fractions. Adding the wax affects permeability and compressibility of pure sand. Intensity of influences is a function of weight percentage of wax that has been added, and other physical and environmental factors. The effects of wax content on hydraulic properties (permeability), and mechanical properties (stress-strain behavior, compressibility) of sandy soils based on a series of experimental efforts were investigated. Obtained experimental results infer that increasing the amount of wax up to 6% causes an about 50% increase in permeability, mainly because of the significant effect of wax in lowering the friction along with covering and filling the angular parts of particles’ surfaces and forming rounded particles. In addition, wax-coated sands show a 20% to 60% decrease in confined compression modulus compared to non wax-coated sands.
Key words:wax-coated sand; confined compression coefficient; permeability; compressibility; stress-strain behavior
