Publications and Research

Document Type

Poster

Publication Date

5-9-2024

Abstract

This study investigates using repurposed whole textiles to modify the mechanical and hydrogeological properties of lightweight Green Roof media and granular pavement soils.

Green Roof Media Green roofs aim to bring the advantages of suburban agriculture to urban environments while improving energy efficiency and enhancing stormwater management in public, commercial, and residential buildings. Previous studies by City Tech undergraduate research assistants demonstrated significant modification in hydrogeological properties when incorporating textile fabric up to 3% textile by weight (%Tex) at an aspect ratio of 1:1. The effects of mixing repurposed whole textile fiber with Green Roof media is evaluated with regards to unit weight, water retention, and hydraulic conductivity. This is done by testing reinforced and unreinforced green roof media according to The Standard Test Method for Maximum Media Density for Dead Load Analysis of Green Roof Systems (ASTM E2399). The present study expands on these results by varying the aspect ratio of the fiber cutouts and fabric properties (fabric type and thickness). The outcomes of this study can play a pivotal role in advancing the successful implementation of green roofs.

Granular Pavement Soils Introducing repurposed whole textiles can function as reinforcement in bearing granular soils. Reinforcement textile fabric can enhance the host soil's strength, stability, and structural integrity. This can be especially advantageous in erosion-prone areas, regions susceptible to landslides, and/or locations requiring heightened load-bearing capacity, such as base and subbase soils under flexible pavements. A recently published study conducted by City Tech undergraduate research assistants demonstrated that the use of whole textile fabric significantly affects the California Bearing Ratio of the host soil. The current study aims to build on these findings by conducting Direct Shear Tests (ASTM D2080) on sand mixed with reinforced fibers and monitoring the effect on the host sand's drained angle of internal friction (ф).

Comments

This poster was presented at the 40th Semi-Annual Dr. Janet Liou-Mark Honors & Undergraduate Research Poster Presentation, May 9, 2024. Mentor: Prof. Ivan L. Guzman (Construction Management & Civil Engineering Technology).

This research project was supported by Tech Transfer through Undergraduate Research & Workforce Development, Recipient/Grant (Contract) Number #69A3551747124, Connected Communities for Smart Mobility Towards Accessible & Resilient Transportation for Equitably Reducing Congestion (C2SMARTER).

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