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Related Concept Videos

Fiber Reinforced Concrete01:22

Fiber Reinforced Concrete

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Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
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Plasticizers01:31

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Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
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Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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Related Experiment Video

Updated: May 22, 2025

The Effect of Construction and Demolition Waste Plastic Fractions on Wood-Polymer Composite Properties
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CDW-Based Geopolymers: Pro and Cons of Using Unselected Waste.

Ilaria Capasso1, Gigliola D'Angelo2, Mercedes Del Río Merino3

  • 1Department of Engineering and Geology, University of Chieti-Pescara "G d'Annunzio", Viale Pindaro 42, 65122 Pescara, Italy.

Polymers
|March 13, 2025
PubMed
Summary

Recycling construction and demolition waste (CDW) into geopolymers offers sustainability. Using unseparated CDW in geopolymer production enhances mechanical properties, boosting environmental and economic benefits.

Keywords:
circular economygeopolymerhistorical buildingsmortarsunselected demolition waste

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Area of Science:

  • Materials Science
  • Sustainable Construction
  • Waste Management

Background:

  • Geopolymer technology offers a sustainable alternative for construction and demolition waste (CDW) recycling.
  • Separating CDW fractions is complex and can diminish reuse benefits.
  • Utilizing unseparated CDW in geopolymer production is a promising approach.

Purpose of the Study:

  • To investigate the feasibility of producing geopolymer mortars from unseparated CDW.
  • To characterize the mineralogical, chemical, and morphological properties of selected CDW.
  • To assess the impact of mixed CDW composition and quantity on geopolymer mortar properties.

Main Methods:

  • Selected CDW (mortars, bricks, stones) were characterized.
  • Geopolymer mortars were produced using single fractions or mixtures of CDW.
  • Characterization included chemical, physical, mechanical, and microstructural analyses.

Main Results:

  • Geopolymer mortars from unseparated CDW exhibited superior mechanical properties compared to those from single fractions.
  • The apparent density of mortars made from unseparated CDW was lower.
  • Mechanical property improvement was independent of the amount of unseparated waste used.

Conclusions:

  • Unseparated CDW can be effectively used to produce geopolymer mortars with enhanced mechanical performance.
  • This approach maximizes environmental and economic benefits by simplifying waste management.
  • Findings support the practical application of unseparated CDW in geopolymer construction materials.