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    A Review for the Performance of Polymers in Pumice Aggregate Concrete
    (Wiley, 2025) Bideci, Alper; Bideci, Ozlem Salli; Ashour, Ashraf; Durmus, Gokhan
    Lightweight aggregates have been utilized in concrete production for many years, and the incorporation of polymer materials into such composites has recently received growing attention due to the potential improvements in mechanical and durability performance. Polymer concrete or PC is concrete that has been coated, reinforced, or made without cement. It uses polymer materials to make the concrete stronger and last longer. The properties of polymer concrete made with pumice aggregate (PAPC) are described for this reason. This review looks at the mechanical and physical properties of PAPC. The results demonstrate that PAPC exhibits superior compressive and flexural strength compared to conventional concrete, along with reduced density and lower water absorption capacity. These enhancements make PAPC a promising material for lightweight and durable construction applications. This study is the first to look at PAPC and gather information that can be used to guide future research.
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    Acoustic, Thermal, and Mechanical Performance of Polymer-Coated Pumice Aggregate Lightweight Concretes
    (Mdpi, 2025) Bideci, Ozlem Salli; Bideci, Alper; Ashour, Ashraf; Khan, Amir
    Pumice aggregate, with its highly porous structure, offers excellent lightweight and insulating characteristics; however, its excessive water absorption and weak interfacial bonding often limit its mechanical and durability performance in concrete applications. To overcome these drawbacks, this study developed a polymer-coated pumice aggregate (PCPA) concrete by applying a thin polyester layer onto the aggregate surface to enhance matrix-aggregate adhesion and reduce permeability. The mechanical, thermal, and acoustic performances of PCPA were systematically evaluated. Results revealed that polyester coating led to a notable improvement in compressive strength (up to 25%) and significantly reduced weight loss after freeze-thaw cycles. Furthermore, PCPA samples exhibited enhanced resistance to thermal degradation, maintaining structural stability even at 600 degrees C, and achieved a 40% higher sound absorption coefficient at 630 Hz compared to uncoated pumice concrete. These findings demonstrate that polyester coating effectively addresses the inherent limitations of pumice concrete, offering a promising approach for producing lightweight concretes with superior durability and multifunctional performance.
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    Mechanical and thermal properties of lightweight concrete produced with polyester-coated pumice aggregate
    (Elsevier Sci Ltd, 2023) Bideci, Alper; Bideci, Ozlem Salli; Ashour, Ashraf
    With the technological advances in the field of building materials, there has been an increasing focus on the research of lightweight concrete made with coated aggregates for improving the durability of concrete. In this study, pumice aggregates were coated with cast-based polyester to obtain polymer-coated pumice aggregates (PCPA). Lightweight concretes were produced with different cement dosages (200, 250 and 300) and PCPAs at different ratios (0%, 50% and 100%). Physical properties, mechanical strength, thermal properties and internal structure analysis (SEM-EDS) of the produced concrete samples were performed. According to the RILEM functional classification of lightweight concrete, the test results showed that REF D300 and REF D250 dosage series are in the semi-load-bearing lightweight concrete class, and the other all series are in the insulation concrete class, and the produced concretes can be classified as lightweight insulation materials. It can also be used in non-load-bearing walls or as an alternative lightweight insulation material.
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    Utilization of Recycled Brick Powder as Supplementary Cementitious Materials-A Comprehensive Review
    (Mdpi, 2024) Bideci, Ozlem Salli; Bideci, Alper; Ashour, Ashraf
    Over the past two decades, extensive research has been conducted to explore alternative supplementary cementitious materials (SCMs) in order to address the environmental concerns associated with the cement industry. Bricks, which are frequently preferred in the construction sector, generate a lot of waste during the production and demolition of existing buildings, requiring environmentally sustainable recycling practices. Therefore, many studies have been carried out in recent years on the use of brick waste as supplementary cementitious materials (SCMs) in cement mortar and concrete production. This critical review evaluates the impact of waste brick powder (WBP) on the mechanical and durability properties of mortar and concrete when used as a partial replacement for cement. It was observed that the properties of WBP-blended cement mortar or concrete depend on several factors, including WBP particle size, replacement ratio, pozzolanic activity, and mineralogical structure. The findings indicate that WBP with a particle size range of 100 mu m to 25 mu m, with a maximum cement replacement level of 10-20%, exhibits a positive impact on the compressive strength of both mortars and concretes. However, it is crucial to emphasize that a minimum curing duration of 28 days is imperative to facilitate the development of a pozzolanic reaction. This temporal requirement plays a vital role in realizing the optimal benefits of utilizing waste brick powder as a supplementary cementitious material in mortars and concretes.