Experimental Study on the Temperature-Dependent Static, Dynamic, and Post-Dynamic Mechanical Characteristics of...

Area of Science:

• Geotechnical Engineering
• Environmental Engineering
• Materials Science

Background:

• Municipal solid waste (MSW) presents a sustainable alternative construction material, offering environmental benefits.
• Understanding the mechanical behavior of MSW under varying conditions is crucial for its effective engineering application.
• Previous research has not fully elucidated the combined effects of temperature and stress on MSW's mechanical response.

Purpose of the Study:

• To analyze the static, dynamic, and post-cyclic shear behavior of MSW.
• To quantify the influence of temperature (5 °C to 80 °C) and normal stress (50-150 kPa) on MSW mechanical properties.
• To determine the temperature sensitivity of different mechanical responses.

Main Methods:

• Preparation of standardized MSW specimens through sieving and crushing.
• Conducting static, dynamic, and post-cyclic shear tests on MSW samples.
• Systematic variation of temperature and applied normal stress during testing.

Main Results:

• MSW's mechanical response exhibits significant temperature dependency across the tested range.
• Lower temperature variations (5 °C-20 °C) had a greater impact than higher variations (40 °C-80 °C).
• Static peak shear strength was highest, followed by post-cyclic, and then dynamic peak shear strength across all temperatures.

Conclusions:

• Temperature is a critical factor influencing the mechanical performance of MSW as a construction material.
• Dynamic shear strength is most sensitive to temperature changes, followed by post-cyclic and static strengths.
• Engineering applications of MSW require careful consideration of operational temperature and stress conditions.