The use of recycled plastic in asphalt is raising interest since contributing to increase the sustainability roads pavements. engineering performance such are commonly assessed but scarcely correlated environmental impacts incorporating asphalt. This research encompasses an evaluation mechanical behaviour and impact introducing low melting point plastics, density polyethylene commingled polyethylene/polypropylene, conventional hot mix While this investigation reveals a reduction moisture...

The recyclability of reclaimed asphalt pavement (RAP) from conventional concrete has been well reported in the literature. However, future plastic-modified at end its service life (P-RAP) is still questionable. lack studies on P-RAP mainly due to current unavailability aged material field, reflecting that application recycled plastics research phase but not widely applied practice. There a concern about ability recycle future, as if recyclable or addition would significantly reduce new mix...

This study investigated the impact of sediment clogging on hydraulic performance porous asphalt (PA) pavements using a novel numerical approach combining discrete element method (DEM) and computational fluid dynamics (CFD). In particular, image analysis techniques captured morphology real aggregates for 3D appearance information. Then, information was used to reproduce their gradation in mixes DEM, including sediments causing PA. The samples DEM were transferred CFD simulation. prepared with...

<div class="section abstract"><div class="htmlview paragraph">In driving condition, the electric drive system of vehicles generates significant heat, which increases temperature motor, leading to reduced performance and energy loss. To manage motor recover energy, a plate-fin heat exchanger (PFHE) is used facilitate exchange between vehicle's thermal management system. In this study, Computational Fluid Dynamics (CFD) method was investigate fin structure on flow within PFHE. The...

In this study, we propose a modelling approach that combines computational fluid dynamics (CFD) and the discrete element method (DEM) to simulate hydraulic performance of three-dimensional (3D) porous asphalt (PA) specimens. Initially, realistic aggregate appearances are captured through image analysis technique. This information is then transferred DEM software for reconstruction pore structure with distinct shapes following real particle size distribution (PSD) as identified by local...

Fracture due to mechanical loads is one of the main distresses asphalt concrete (AC) pavement. Characterisation fracture properties AC thus vital. The semi-circular bending (SCB) test recognised as a simple but robust evaluate resistance AC. Current SCB standards adopt fixed sample geometry 150 mm diameter, while 100 diameter has not standardised yet. However, in specifications for design and quality control purposes, such indirect tensile resilient modulus, cylindrical samples with either...

Using reclaimed asphalt pavement (RAP) increases the sustainability benefits and can enhance performance of warm mix (WMA) compared to traditional hot (HMA). However, RAP content is generally limited in WMA because adding high may reduce WMA. In this paper, authors studied possibility incorporating from 25 70% by mass using Evotherm as an additive. Laboratory WMA–RAP mixtures was characterized a control HMA terms moisture susceptibility, rutting resistance, fatigue characterization. Test...

Abstract This study used an advanced modelling approach capable of capturing the complex behaviour asphalt concrete to model modified wheel tracking test using a recent experimental set-up in accordance with ASTM D8292-20. The uses discrete element method (DEM) naturally produce heterogeneous internal structure and governs at grain level by interparticle contact model. is characterising rate time dependency, viscoelastic-damage, plastic-damage utilising coupling elastoplastic-damage law...

Reclaimed asphalt pavement (RAP) has been used recently in warm-mix (WMA) as a part of sustainable and green design. The main issue using high RAP content WMA is associated cracking. To optimize the use reduce life cycle costs, robust tool testing to control quality mixtures terms cracking vital. Among available tests, semicircular-bending (SCB) test regarded simple but useful characterize behavior concrete. standardized number standards for 150-mm-diameter samples. Recently, authors...

Porous asphalt (PA) pavements are used as an alternative for non-permeable to tackle hydroplaning issues and reduce splash spray. The key aspect of designing a PA pavement is its hydraulic performance. This study introduces novel numerical approach combining the discrete element method (DEM) computational fluid dynamics (CFD) model performance PA. Different from traditional methods scanning internal matrix using X-rays, this uses photogrammetry-analysis technique convert aggregate structure...

This study investigates the performance of asphalt concrete containing recycled plastics as synthetic aggregates in dry mixing process. Two types were used, namely, acrylonitrile butadiene styrene (RABS) and Polyethylene Terephthalate (RPET), based on high-temperature properties that make them suitable to be treated (i.e. do not melt during phase). The proportions chosen at 0.5%, 1%, 2% 4% mix mass. laboratory testing programme includes evaluation compactability properties, moisture...

Recent research using the semicircular bending (SCB) test with 100 mm diameter specimen cored from gyratory compacted samples demonstrated suitability of this sample size for testing dense graded asphalt mixes a nominal maximum aggregate (NMAS) up to 19 mm. Alongside compactor, Marshall compactor remains part current specifications in many countries, including ASTM international standards. The uses 4-inch (101.6 mm) mould, which is slightly larger than compactor's and employs different...

Abstract This study aims to analyse the behaviour of asphalt concrete produced from recycled plastic-modified bitumen. particular production process is known as wet method, which involves blending low melting point plastics, mostly polyolefins, in hot bitumen before mixing with preheated aggregate. Based on a comprehensive research that investigated several plastics for two common different collection streams were evaluated: low-density polyethylene post-industrial recycling operations and...

The rapid development of heavy industry in Vietnam leads to the establishments steel industry. Steel slag, a by-product steelwork industry, under Vietnamese's law, was considered as deleterious solid waste which needed be processed and landfilled. However, this has changed recently, slag is now seen normal or non-deleterious waste, been studied for reuse construction In study, used, replacement mineral aggregate, hot mix asphalt. Two asphalt mixtures with an equivalent nominal aggregate size...

This paper considers the objective evaluation of seam puckering on three-dimensional garments. In order to simulate garment surfaces in three dimensions, seamed samples are supported five different surfaces: plane (both with and without tilt) curved convex concave). A set having seams varying degrees pucker prepared from each fabrics, profiles parallel measured using a laser distance scanner. These then filtered band-pass Cheby shev filter (where "frequencies" cycles/m) remove high frequency...

As a first step towards objective evaluation of garment appearance, the present work considered seams on three‐dimensional surfaces which simulate actual surfaces. The geometric profiles 3‐D were scanned using laser scanner. 1‐D and 2‐D digital filters applied to obtain pucker signals from by removing “high frequency” components due fabric surface texture “low silhouette drape. advantages disadvantages are compared. Four physical parameters examined see their relevance subjective grade. It...

Polymer-modified bitumen (PMB) is a high-performance typically used for asphalt applications where conventional cannot cope with traffic and weather effects. PMB-RAP, reclaimed pavement (RAP) milled from PMB pavements, often treated like RAP during stockpile management reuse. Polymers are known to enhance performance, but can they increase durability the next level when in PMB-RAP? To answer this question, comprehensive study was conducted evaluate performance of laboratory-aged mixes...

<title>Abstract</title> The use of crumb rubber (CR) from shredded end-of-life vehicle tyres in road engineering practices has become increasingly popular as a method enhancing sustainability. Historically, produced only used sources with high natural content. This approach was believed to enhance the final properties modified binder, hence also providing betterments asphalt mix. presence lower volume textile fibre radial truck (TT) contributed recycling these type for applications. However,...