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Related Concept Videos

Pozzolans01:21

Pozzolans

182
Pozzolans are siliceous or aluminous materials blended with Portland cement. They interact with the calcium hydroxide produced during the hydration of Portland cement and contribute to improved strength and durability of concrete. The pozzolanic activity, a measure of a pozzolan's effectiveness, is typically assessed using the strength activity index, as defined in ASTM C 618-93, which calculates the ratio of the compressive strength of cement mixtures with and without pozzolan.
Fly ash is...
182
Additives and Fillers in Concrete01:29

Additives and Fillers in Concrete

124
Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...
124
Fiber Reinforced Concrete01:22

Fiber Reinforced Concrete

125
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...
125
Accelerated Curing of Concrete01:25

Accelerated Curing of Concrete

233
Accelerating concrete curing is achieved by applying heat and additional moisture. This process accelerates the hydration of the cement, resulting in an earlier strength gain in the concrete. Steam curing is a method wherein the concrete products are either transported through a chamber on a conveyor belt or encased in plastic, allowing steam at atmospheric pressure to circulate freely around them. This process begins with a phase of moist curing that typically lasts between 3 to 5 hours, after...
233
Porosity in Cement Paste01:18

Porosity in Cement Paste

213
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
213

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Magnet Assisted Composite Manufacturing: A Flexible New Technique for Achieving High Consolidation Pressure in Vacuum Bag/Lay-Up Processes
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Porous Fly Ash/Aluminosilicate Microspheres-Based Composites Containing Lightweight Granules Using Liquid Glass as

Olga Miryuk1, Roman Fediuk2,3, Mugahed Amran4,5

  • 1Department of Construction and Building Materials Science, Rudny Industrial Institute, Rudny 111500, Kazakhstan.

Polymers
|September 9, 2022
PubMed
Summary

This study develops a novel, eco-friendly, cementless heat-insulating composite material using liquid glass and waste fillers. The resulting lightweight concrete offers excellent thermal insulation and durability for energy-efficient buildings.

Keywords:
heat-insulating materialslightweight concreteliquid glassporous fillerthermal energy waste

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Area of Science:

  • Building Materials Science
  • Materials Engineering
  • Sustainable Construction

Background:

  • Growing demand for energy-efficient building materials necessitates alternatives to traditional, high-emission cement-based products.
  • Development of novel heat-insulating composites is crucial for reducing the ecological footprint of the construction industry.
  • Exclusion of low-ecological cement from building materials is a key trend in modern, sustainable development.

Purpose of the Study:

  • To develop a resource-saving technology for a novel heat-insulating composite material.
  • To create an effective, cementless lightweight concrete utilizing porous granules and a matrix of liquid glass with thermal energy waste.
  • To investigate the formation patterns and structural stability of porous materials during thermal curing with technogenic fillers.

Main Methods:

  • Formulation of liquid glass mixtures with varying contents of fly ash and aluminosilicate microspheres.
  • Thermal curing of liquid glass mixtures to create porous granules and composite material matrices.
  • Characterization of material properties including density, thermal conductivity, strength, and moisture/temperature resistance.

Main Results:

  • Established control over molding mass properties by adjusting fly ash and aluminosilicate microsphere content.
  • Developed a heat-insulating concrete with density (380-650 kg/m³), thermal conductivity (0.095-0.100 W/(m·°C)), and strength (3.5-9.0 MPa).
  • Demonstrated structural regulation of composite materials by varying the degree of porous granule filling in the liquid glass matrix.

Conclusions:

  • A viable, cementless heat-insulating composite material based on porous aggregate and a liquid glass matrix has been successfully developed.
  • The developed material exhibits excellent thermal insulation, mechanical strength, and durability under variable environmental conditions.
  • A technological scheme for the joint production of granular and composite materials from liquid glass mixtures was proposed, enabling sustainable construction practices.