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Additives and Fillers in Concrete

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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.
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Related Experiment Video

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Film Extrusion of Crambe abyssinica/Wheat Gluten Blends

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Vegetable Additives in Food Packaging Polymeric Materials.

Silvestru Bogdănel Munteanu¹, Cornelia Vasile²

¹Faculty of Physics, Alexandru Ioan Cuza University, 11 Carol I bvd, 700506 Iasi, Romania.

|December 28, 2019

Summary

This review explores plant-derived materials like lignocellulosic fibers and plant extracts as sustainable additives for polymers. These natural compounds enhance material properties and offer applications in packaging and healthcare industries.

Keywords:

additive antimicrobial antioxidant chitosan lignin lignocellulosic fibers nano-cellulose plant extracts polysaccharides reinforcement starch

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Area of Science:

Materials Science
Biotechnology
Polymer Chemistry

Background:

Plants offer abundant, sustainable bioresources for material science applications.
Natural additives like lignocellulosic fibers, nano-cellulose, lignin, and plant extracts enhance polymer properties.
There is a growing demand for biobased, biodegradable additives with low environmental impact.

Purpose of the Study:

To review the use of lignocellulosic materials, lignin, and nano-cellulose as reinforcements in polymer matrices.
To explore applications of plant extracts as active ingredients in polysaccharide-based food packaging.
To highlight the potential of plant-derived materials in sustainable material development.

Main Methods:

Literature review of recent advancements in plant-based polymer additives.
Analysis of lignocellulosic materials, lignin, and nano-cellulose as fillers/reinforcements.
Examination of plant extracts in polysaccharide matrices for food packaging.

Main Results:

Lignocellulosic materials, lignin, and nano-cellulose effectively reinforce various polymer matrices.
Plant extracts (phenolic and flavonoid compounds) show promise as active agents in food packaging.
Sustainable additives improve polymer performance for diverse applications.

Conclusions:

Plant-derived materials represent a viable and sustainable alternative to synthetic additives in polymers.
These natural additives contribute to enhanced material functionality and reduced environmental footprint.
Further research into plant-based additives can drive innovation in packaging, healthcare, and other industries.