The development of a novel, microwave assisted, half-warm mixed asphalt

Dulaimi, Anmar; Al-Busaltan, Shakir; Sadique, Monower

doi:10.1016/j.conbuildmat.2021.124043

Cited by 16 publications

(7 citation statements)

References 75 publications

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“…In accordance with the recommendations of Dulaimi et al 52 and following the Marshall Method for Emulsified Asphalt Aggregate Cold Mixture Design (MS-14) 53 , the aggregates, including the coarse and fine components, as well as the fillers, were initially mixed with the required pre-wetting water for 1 min at a slow speed to prepare the cold asphalt emulsion mixtures (CAEMs). The bitumen emulsion was gradually added during the subsequent 30 s of mixing.…”

Section: Methodsmentioning

confidence: 99%

Innovative geopolymer-based cold asphalt emulsion mixture as eco-friendly material

Dulaimi,

Al Busaltan,

Mydin

et al. 2023

Sci Rep

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In recent years, there has been a growing interest in cold asphalt emulsion mixture (CAEM) due to its numerous advantages, including reduced CO2 emissions, energy savings, and improved safety during construction and application. However, CAEM has often been considered inferior to hot mix asphalt (HMA) in terms of performance. To address this issue and achieve desirable performance characteristics, researchers have been exploring the modification of CAEM using high-cost additives like ordinary Portland cement. In this study, the focus was on investigating the effects of utilizing waste alkaline Ca(OH)2 solution, ground granulated blast-furnace slag (GGBFS), and calcium carbide residue (CCR) as modifiers to enhance the properties of CAEM. The aim was to develop an innovative geopolymer geopolymer-based cold asphalt emulsion mixture (GCAE). The results of the study revealed that the use of waste alkaline Ca(OH)2 solution led to an increase in early hydration, which was confirmed through scanning electron microscopy. Furthermore, the experimental findings demonstrated that waste alkaline Ca(OH)2 solution significantly contributed to the rapid development of early-age strength in GCAE. As a result, GCAE showed great potential for utilization in pavement applications, particularly for roads subjected to harsh service conditions involving moisture and temperature. By exploring these alternative modifiers, the study highlights a promising avenue for enhancing the performance of CAEM and potentially reducing the reliance on expensive additives like ordinary Portland cement. The development of GCAE has the potential to offer improved performance and durability in pavement applications, thus contributing to sustainable and efficient road infrastructure.

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Section: Methodsmentioning

confidence: 99%

Innovative geopolymer-based cold asphalt emulsion mixture as eco-friendly material

Dulaimi,

Al Busaltan,

Mydin

et al. 2023

Sci Rep

Self Cite

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“…Then, the particles are dehydrated and ground to fine materials to create the GGBS product [29]. The product is a renowned building material, widely used in the production of concrete, mortar, and cement [87]. The particles of GGBS have a glassy structure and contain mono-silicate, similar to cement clinker [88].…”

Section: Aluminosilicate (As)mentioning

confidence: 99%

Geopolymers: The Green Alternative to Traditional Materials for Engineering Applications

et al. 2023

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Researchers have been driven to investigate sustainable alternatives to cement production, such as geopolymers, due to the impact of global warming and climate change resulting from greenhouse gas emissions. Currently, they are exploring different methods and waste materials to enhance the mechanical and physical properties of geopolymer and expand its application range. This review paper offers a thorough analysis of the utilization of various waste materials in geopolymer manufacturing and shows the creative contribution of this research to the development of environmentally friendly cement substitutes. The article covers the properties, durability, and practical applications of geopolymer composites made from various waste binders. It includes a microstructure and chemical analysis. The research findings indicate that geopolymers are an effective cementitious binder substitute for cement in various applications. Additionally, the ecological and carbon footprint analysis highlights the sustainability of geopolymers compared to cement.

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“…Another type of warm asphalt technology is half-hot mix asphalt (HWMA). While the production temperature of WMA mixes is in the range of 100-150 • C, HWMA technology permits asphalt pavement production at a reduction temperature of less than 100 • C [70,71]. HWMA technology employs chemical additives and foaming processes to minimize HMA mixing and compaction temperatures [70].…”

Section: Mixing and Production Technologymentioning

confidence: 99%

A Comprehensive Overview of the Utilization of Recycled Waste Materials and Technologies in Asphalt Pavements: Towards Environmental and Sustainable Low-Carbon Roads

Yaro,

Sutanto,

Baloo

et al. 2023

Processes

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Given the prevailing concerns about greenhouse gas emissions, global warming, and the growing demand for renewable resources, the pavement industry, among others, is actively engaged in researching and exploring low-carbon materials and technologies. Despite the growing interest in low-carbon asphalt pavement, there is still a significant knowledge gap regarding the use of various waste materials and technologies to achieve this goal. This study aims to close this gap by conducting a systematic review and scientometric assessment of the existing studies on the use of waste materials and technologies for low-carbon asphalt pavement. The study spans the years 2008 to 2023, and the scientometric analysis was conducted using the VOS viewer application. The study identifies materials and technologies in this area by examining co-authored country studies, publication sources, and keyword co-occurrence. It should be noted that a limited number of waste materials that allow CO2 emissions reduction was analyzed in this study. However, other waste categories, such as bio-oils and polymers, which can provide positive either environmental or economic impacts on the production of paving materials, were not considered in the scope of the study. Based on the current review, it was found that integrating recycled waste materials like recycled asphalt pavement, biochar, or crumb rubber with alternative mixing technologies such as warm mix asphalt and cleaner energy can significantly reduce CO2 emissions. China and the United States were identified as key research contributors to the low-carbon pavement. Furthermore, biomass-based fuel and electric construction equipment lower carbon and greenhouse gas emissions by 36–90% and 67–95%, respectively. However, before various recycled waste materials and technologies can be widely used in the asphalt industry, various challenges need to be addressed, including cost concerns, performance and durability concerns, standardization and regulations, availability, integration with existing facilities, and insufficient field and long-term data. The review identified critical research gaps, such as the absence of a homogeneous and reliable standard method for low-carbon asphalt pavement, limited field performance data, and a life cycle assessment approach in analyzing the emission reduction effects. The reviews will aid in the paradigm shift to a more carbon-friendly pavement industry that uses recycled waste materials and technologies.

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The development of a novel, microwave assisted, half-warm mixed asphalt

Cited by 16 publications

References 75 publications

Innovative geopolymer-based cold asphalt emulsion mixture as eco-friendly material

Innovative geopolymer-based cold asphalt emulsion mixture as eco-friendly material

Geopolymers: The Green Alternative to Traditional Materials for Engineering Applications

A Comprehensive Overview of the Utilization of Recycled Waste Materials and Technologies in Asphalt Pavements: Towards Environmental and Sustainable Low-Carbon Roads

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