Introduction to green processing for sustainable materials

This paper aims to investigate the influence of utilization micro cement kiln dust as a sustainable materials additive in order to reduce the voids and micro cracks in the cementitious mortar materials which cause a drastic reduction in the load carrying capacity of the element. Its therefore very important to decrease the pores and enhance the mechanical strength of the cementitious composite materials. In this article, the properties of self-compacting mortar containing micro cement dust additive was experimentally assessed. Micro cement dust powder was added to the self-compacting mortar in (1, 2, 3, 4 and 5 %) percentage by weight of cement to be used as cementitious sustainable materials. The experimental results indicated that the modification and enhancement of the workability of fresh mixture and the mechanical strengths of self-compacting mortar were increased as micro cement dust additives increases. Also; the water absorption and total porosity were decreased with increases of micro cement dust powder.

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Bio-Based Alternatives to Phenol and Formaldehyde for the Production of Resins

Polymers ◽

10.3390/polym12102237 ◽

2020 ◽

Vol 12 (10) ◽

pp. 2237 ◽

Cited By ~ 2

Author(s):

P. R. Sarika ◽

Paul Nancarrow ◽

Abdulrahman Khansaheb ◽

Taleb Ibrahim

Keyword(s):

Raw Materials ◽

Phenol Formaldehyde ◽

Raw Material ◽

Wood Industry ◽

Suitable Material ◽

The Past ◽

Wide Range ◽

Recent Developments ◽

Sustainable Materials ◽

Materials Used

Phenol–formaldehyde (PF) resin continues to dominate the resin industry more than 100 years after its first synthesis. Its versatile properties such as thermal stability, chemical resistance, fire resistance, and dimensional stability make it a suitable material for a wide range of applications. PF resins have been used in the wood industry as adhesives, in paints and coatings, and in the aerospace, construction, and building industries as composites and foams. Currently, petroleum is the key source of raw materials used in manufacturing PF resin. However, increasing environmental pollution and fossil fuel depletion have driven industries to seek sustainable alternatives to petroleum based raw materials. Over the past decade, researchers have replaced phenol and formaldehyde with sustainable materials such as lignin, tannin, cardanol, hydroxymethylfurfural, and glyoxal to produce bio-based PF resin. Several synthesis modifications are currently under investigation towards improving the properties of bio-based phenolic resin. This review discusses recent developments in the synthesis of PF resins, particularly those created from sustainable raw material substitutes, and modifications applied to the synthetic route in order to improve the mechanical properties.

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Sustainable Concrete Application in the Manufacture of University Urban Furniture

MATEC Web of Conferences ◽

10.1051/matecconf/201930305001 ◽

2019 ◽

Vol 303 ◽

pp. 05001

Author(s):

Mónica Bedoya ◽

Federico Rivera ◽

María Rico ◽

David Vélez ◽

Andrés Urrego ◽

...

Keyword(s):

Finite Elements ◽

Mechanical Characteristics ◽

Coal Ash ◽

Sustainable Concrete ◽

Waste Production ◽

Construction And Demolition Wastes ◽

The World ◽

Sustainable Materials ◽

The University ◽

Community Diagnosis

It is clear that construction and demolition wastes (CDW) are constantly increasing throughout the world and these wastes can be used effectively to minimize the consumption of natural resources in the manufacture of more sustainable concrete. The CDW occupy an important segment of world waste production and its generation reached approximately 3 billion tons in 2012 in 40 countries [1]. Although this topic has been studied in the world, it is still valid for the reuse of waste that is constantly increasing, and although in many countries there are already examples of its use this type of concrete in Colombia and in the Medellìn city lacks applications. This project proposes the application of a sustainable concrete made with CDW and coal ash in the Medellín city for its implementation in the construction of urban furniture. A university community diagnosis of the needs in terms of furnishing was made. With the design reached, a modular chair was proposed to enable spaces within the university. The mechanical characteristics of the concrete and the design of the chair are evaluated and a simulation is done through finite elements to evaluate the viability of the proposed concrete, finding that with these properties is possible to manufacture durable and sustainable furniture that serves as an example for the application of sustainable materials

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Celery-derived porous carbon materials for superior performance supercapacitor

Nanoscale Advances ◽

10.1039/d1na00342a ◽

2021 ◽

Author(s):

Sirui Liu ◽

Ya ping Xu ◽

Jinggao Wu ◽

Jing Huang

Keyword(s):

Porous Carbon ◽

Carbon Materials ◽

High Energy ◽

Cycle Life ◽

Superior Performance ◽

Energy Output ◽

Next Generation ◽

Porous Carbon Materials ◽

Long Cycle Life ◽

Sustainable Materials

Supercapacitors are of paramount importance for next-generation applications, demonstrating high energy output, an ultra-long cycle life and utilizing green and sustainable materials. Herein, we utilize celery, a common biomass from...

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