Abstract
The liquefaction of tailings is a common failure mode under earthquake actions. The traditional treatment measures of waste rubber have the disadvantages of environmental pollution and occupying soil resources. The combined treatment of waste rubber and tailings is very likely to have important engineering application and theoretical value, and the dynamic characteristics of the rubber‐tailings mixture (RTM) are essential and indispensable for handling them together. In this paper, the dynamic triaxial test was used to study the dynamic mechanical characteristics of the RTM. The test was divided into 5 groups with 54 valid samples. The effects of the rubber particle size, rubber content, consolidation pressure, pH value, and soaking time on the dynamic characteristics of the RTM were studied and discussed. The results show that the liquefaction cycle number of the RTM is 50% higher than that of tailings, and the particle cluster effect theory of the RTM is put forward. It will provide a theoretical basis and guidance for the treatment of the waste rubber and tailings.
Highlights
E liquefaction of tailings is a common failure mode under earthquake actions. e traditional treatment measures of waste rubber have the disadvantages of environmental pollution and occupying soil resources. e combined treatment of waste rubber and tailings is very likely to have important engineering application and theoretical value, and the dynamic characteristics of the rubber-tailings mixture (RTM) are essential and indispensable for handling them together
E effects of the rubber particle size, rubber content, consolidation pressure, pH value, and soaking time on the dynamic characteristics of the RTM were studied and discussed. e results show that the liquefaction cycle number of the RTM is 50% higher than that of tailings, and the particle cluster effect theory of the RTM is put forward
(2) On the premise of unchanged rubber particle size, the liquefaction resistance of the RTM samples increases first and decreases with the increase of particle content, which is in line with the quadratic parabolic law
Summary
Is test mainly studied the dynamic characteristics of the RTM under multiple effects, namely, rubber particle content, rubber particle size, consolidation pressure, pH value of the soaked solution, and acid soaking time. Before mixing rubber particles with tailings, due to the existence of some small bubbles and hydrophobic layers, the rubber particles floated on the water surface and were difficult to reach the saturation state. E rubber particles and tailings were vacuum-saturated in distilled water for 24 h. Different vibration frequency will change the growth rate of axial strain with time and vibration number before liquefaction and affect the relationship between axial strain ratio and vibration number ratio [30]
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