scholarly journals NANOTECHNOLOGIES IN CONSTRUCTION

2021 ◽  
pp. 7-14
Author(s):  
O.S. BALAN
Keyword(s):  
Food Packaging ◽  
Building Materials ◽  
Chemical Properties ◽  
Practical Significance ◽  
Construction Sector ◽  
Long Term Effects ◽  
Daily Lives ◽  
Building Product ◽  
The Many ◽  
Physical And Chemical

Problem statement. Cosmetics, clothing, and even food packaging: nanomaterials have invaded our daily lives. The construction and construction sector is no exception, and is undoubtedly one of the largest users of this technology. It is difficult to know if a building product contains nanomaterials. Indeed, unlike certain products, such as cosmetics, food or biocides (insecticides, detergents), no regulations establish special labeling. However, they are very widespread and are used to improve the properties of most materials: cement, plaster, glass, tiles, insulation metals, paints, etc. The benefits of using nanoparticles in construction are huge, promising extraordinary physical and chemical properties for modified building materials. Among the many different types of nanoparticles, titanium dioxide, carbon nanotubes, silicon dioxide, copper, clay, and aluminum oxide are the most widely used nanoparticles in the construction sector [1]. The purpose of this article is to analyze the use of nanoparticles in the construction industry to illustrate the benefits of using nanoparticles and address the short − and long-term effects of nanoparticles on the environment and human health in the microcosm of industry, so that the results can be generalized. Results. The use of nanotechnologies in construction and their properties are analyzed. Scientific novelty and practical significance. The problem of using nanothenologies in construction is analyzed.

scholarly journals Nanoparticles in Construction Materials and Other Applications, and Implications of Nanoparticle Use

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3052 ◽  
Author(s):  
Mohajerani ◽  
Burnett ◽  
Smith ◽  
Kurmus ◽  
Milas ◽  
...  
Keyword(s):  
Ultrafine Particles ◽  
Construction Materials ◽  
Chemical Properties ◽  
Environmental Safety ◽  
Long Term Effects ◽  
Potential Benefits ◽  
Production Quantity ◽  
The Many ◽  
Physical And Chemical

Nanoparticles are defined as ultrafine particles sized between 1 and 100 nanometres in diameter. In recent decades, there has been wide scientific research on the various uses of nanoparticles in construction, electronics, manufacturing, cosmetics, and medicine. The advantages of using nanoparticles in construction are immense, promising extraordinary physical and chemical properties for modified construction materials. Among the many different types of nanoparticles, titanium dioxide, carbon nanotubes, silica, copper, clay, and aluminium oxide are the most widely used nanoparticles in the construction sector. The promise of nanoparticles as observed in construction is reflected in other adoptive industries, driving the growth in demand and production quantity at an exorbitant rate. The objective of this study was to analyse the use of nanoparticles within the construction industry to exemplify the benefits of nanoparticle applications and to address the short-term and long-term effects of nanoparticles on the environment and human health within the microcosm of industry so that the findings may be generalised. The benefits of nanoparticle utilisation are demonstrated through specific applications in common materials, particularly in normal concrete, asphalt concrete, bricks, timber, and steel. In addition, the paper addresses the potential benefits and safety barriers for using nanomaterials, with consideration given to key areas of knowledge associated with exposure to nanoparticles that may have implications for health and environmental safety. The field of nanotechnology is considered rather young compared to established industries, thus limiting the time for research and risk analysis. Nevertheless, it is pertinent that research and regulation precede the widespread adoption of potentially harmful particles to mitigate undue risk.

scholarly journals Utilization of Pet Wastes Aggregate in Building Construction - A Review

2020 ◽  
Vol 9 (3) ◽  
pp. 656-663
Keyword(s):  
Building Materials ◽  
Construction Materials ◽  
Chemical Properties ◽  
Waste Recycling ◽  
Building Construction ◽  
Recycled Pet ◽  
Pet Waste ◽  
Physical And Chemical ◽  
Plastic Containers ◽  
And Chemical Properties

The rapid increase of plastics waste produced worldwide today poses a danger to human health because of the pollution caused by the unsafe disposal and non-biodegradability of this waste combined with toxic gas emissions during incineration. Globally, PET (polyethylene terephalate) is commonly used for bottling water and other plastic containers. Recycling the waste would be an additional benefit. This study focuses some researchers on the forms, methods of recycling and various literature applications of PET wastes. Recycled PET can of course be used when combined with the sand aggregate to manufacture of various construction materials, such as tiles, bricks, paving stones etc. This research focuses on its application as it attracts substantial building materials such as the manufacture of various PET waste tiles and their unique mechanical , physical and chemical properties; There are some important studies discussed in relation to PET waste, recycling methods , and results from the study. Even various applications are described here. Its usefulness is further defined as roofing Composite concrete, floor tiling and other applications

scholarly journals Modern edaphic conditions of ravine oak forest growing in the south Voronezh region

2017 ◽  
Vol 6 (4) ◽  
pp. 54-61
Author(s):  
Девятова ◽  
Tat'yana Devyatova ◽  
Алаева ◽  
Liliya Alaeva ◽  
Аносова ◽  
...  
Keyword(s):  
Forest Ecosystems ◽  
Chemical Properties ◽  
Practical Significance ◽  
Physical And Chemical Properties ◽  
Standard Methods ◽  
Edaphic Conditions ◽  
Voronezh Region ◽  
Aggregate Composition ◽  
Physical And Chemical ◽  
And Chemical Properties

We studied morphological features of the structure of the profile of forest soils, their structural-aggregate composition, chemical, physical and chemical properties using standard methods. The differ-ences in the studied parameters depending on the position in the relief are defined. Research are pre-sented, which has high scientific and practical significance for studying the conditions of growth, spatial distribution, productivity, features of functioning of natural forest ecosystems and improving and detailing taxonomic position of soils of gulley and ravine complex.

scholarly journals Physicochemical Properties of Klutuk banana Leaves (Musa balbisiana Colla) Susu and Wulung Cultivars with its Potential as Antioxidant

2020 ◽  
Vol 1 (1) ◽  
pp. 18
Author(s):  
Safinta Nurindra Rahmadhia ◽  
Titisari Juwitningtyas
Keyword(s):  
Physical Properties ◽  
Food Packaging ◽  
Antioxidant Properties ◽  
Chemical Properties ◽  
Significant Activity ◽  
Musa Balbisiana ◽  
Banana Leaves ◽  
Physical And Chemical ◽  
Banana Leaf ◽  
Potential Use

Banana leaf is mostly used as food packaging materials. The most often used leaf of banana trees is from Klutuk banana. Its leaf is the broadest and most durable among other banana leaf cultivars. However, the research of potential use of Klutuk banana leaf has not much done. In this research, the physical and chemical properties of Klutuk banana leaves will be observed from the very top to the bottom of the tree. Physical properties explored from Klutuk banana leaves are tensile strength, elongation, thickness, and color of the leaf. The leaf then will be extracted using methanol so that its antioxidant properties can be known. The leaf from the third petiole of Klutuk banana susu and wulung cultivars, has the best physical properties, i.e., mechanical, color, and antioxidant activity properties, and is best to use as food packaging material. The most significant activity of antioxidant is found from the first shoot of Klutuk banana susu and wulung leaf cultivars.

scholarly journals Recent Developments in Food Packaging Based on Nanomaterials

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 830 ◽  
Author(s):  
Yukun Huang ◽  
Lei Mei ◽  
Xianggui Chen ◽  
Qin Wang
Keyword(s):  
Food Systems ◽  
Food Industry ◽  
Food Packaging ◽  
Chemical Properties ◽  
Synthetic Methods ◽  
Recent Developments ◽  
Food Quality And Safety ◽  
Research Findings ◽  
Increasing Demand ◽  
Physical And Chemical

The increasing demand for high food quality and safety, and concerns of environment sustainable development have been encouraging researchers in the food industry to exploit the robust and green biodegradable nanocomposites, which provide new opportunities and challenges for the development of nanomaterials in the food industry. This review paper aims at summarizing the recent three years of research findings on the new development of nanomaterials for food packaging. Two categories of nanomaterials (i.e., inorganic and organic) are included. The synthetic methods, physical and chemical properties, biological activity, and applications in food systems and safety assessments of each nanomaterial are presented. This review also highlights the possible mechanisms of antimicrobial activity against bacteria of certain active nanomaterials and their health concerns. It concludes with an outlook of the nanomaterials functionalized in food packaging.

Vermiculite

Public Health ◽  
2021 ◽  
Keyword(s):  
Building Materials ◽  
Asbestos Exposure ◽  
Chemical Properties ◽  
Wide Distribution ◽  
Mining Operations ◽  
The World ◽  
Health Studies ◽  
Amphibole Asbestos ◽  
Asbestiform Minerals ◽  
Physical And Chemical

This series of articles should provide ample background to the story of vermiculite. It has served as a valuable commercial product over time, and continues to be mined, processed, and utilized around the world. For many years, vermiculite has been appreciated for its physical and chemical properties. Its physical properties, which allow expansion to a light density particle, make it suitable for light aggregate in concrete and other building materials and low heat transfer effective for insulation. The chemical properties which include an active cation exchange surface are ideal for agricultural products. Its natural formation is a micaceous mineral, composed of flat crystal plates arranged in a multi-laminate stack. Of great misfortune is the association of some vermiculite deposits with asbestiform amphibole formations. A remote Montana vermiculite deposit cohabitated with a large formation of these asbestiform minerals. Further complicating the situation is that this vermiculite deposit near Libby, Montana, produced a large majority of the world supply during the sixty-seven years of operation resulting in wide distribution of contaminated vermiculite. The epicenter of mining and processing was an isolated town where ongoing occupational and environmental exposures spanned throughout the years of mining operations. Morbidity and mortality studies recognize the pervasive adverse effects from amphibole exposure, not just in Libby, Montana, but also at export sites processing the vermiculite ore. Being the first population exposed to the unstudied asbestiform amphiboles winchite and richterite, there has been significant advancement in understanding their induced health effects. Studies in the toxicology of fibrous amphiboles and human health studies where a different pattern of asbestos-induced disease has been observed with Libby amphibole asbestos exposure have been completed. The observations have broadened our understanding of Libby amphiboles and enlightened us to the hazards of environmental exposure, and the long-term public health risk from existing contaminated vermiculite.

scholarly journals Migration Test of Polylactic Acid Packaging that Modified with (Butyl hydroxy toluene) and (Tert butyl hydroxy quinon) Synthetic Antioxidant in Food Simulant

2019 ◽  
Vol 35 (2) ◽  
pp. 552-556
Author(s):  
Hanafi Hanafi ◽  
Nurdiani Nurdiani ◽  
Septilina Melati Sirait ◽  
Dhina Aprilia Nurani Widyahapsari ◽  
Candra Irawan
Keyword(s):  
Antioxidant Activity ◽  
Food Packaging ◽  
Chemical Properties ◽  
Total Phenol ◽  
Poly Lactic Acid ◽  
Synthetic Antioxidant ◽  
Visual Appearance ◽  
Tert Butyl ◽  
Before And After ◽  
Physical And Chemical

Plastic as food packaging can cause environmental and health problem. One solution for this problems is by substitute conventional plastic into biodegradable plastic such as poly(lactic acid) (PLA). To improve the physical and chemical properties of PLA, synthetic antioxidant such as Butyl Hydroxyl Toluene (BHT) and Tert Butyl Hydroxyl Quinon (TBHQ) were added into PLA. The analysis was carried out on the PLA-BHT and PLA-TBHQ packaging and also food simulants before and after storage at different temperature for 10 days. The analysis included visual appearance, antioxidant activity, total phenol and overall migration. Both PLA-BHT and PLA-TBHQ packaging that were incubated at temperature 40°C had larger migration than at 29°C. The antioxidant activity and total phenol of PLA-TBHQ was higher than PLA-BHT and both of them had decreased antioxidant activity and total phenol during storage but the decreased rate at temperature 40°C was higher than at temperature 29°C.

scholarly journals Recent advances in the synthesis and applications of mordenite zeolite – review

RSC Advances ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 250-267
Author(s):  
S. Narayanan ◽  
P. Tamizhdurai ◽  
V. L. Mangesh ◽  
C. Ragupathi ◽  
P. Santhana krishnan ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Recent Advances ◽  
The Many ◽  
Physical And Chemical ◽  
And Chemical Properties

Among the many industrially important zeolites, mordenite is found to be interesting because of its unique and exceptional physical and chemical properties.

Studying Physical and Chemical Properties of Graphene Oxide and Reduced Graphene Oxide and Their Applications in Sustainable Building Materials

2021 ◽  
pp. 221-238
Author(s):  
Omar Ibrahim ◽  
Savaş Erdem ◽  
Ezgi Gurbuz
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Carbon Nanostructures ◽  
Building Materials ◽  
Chemical Properties ◽  
Sustainable Building ◽  
Reduced Graphene ◽  
Electron Holes ◽  
Physical And Chemical ◽  
High Suction

In this chapter, the authors identified graphene oxide (OG)/reduced graphene oxide (RGO) as nano composites by studying its nanoparticles' properties physically, chemically, and mechanically. In this study, they mentioned the photo catalyst materials PC regarding carbon nanostructures such as GO and RGO, which have excellent oxygen functionalities, efficient adsorption areas, and considerable surface area. The compositions of GO and RGO exceed electron-holes pair reinstallation time and minimize energy hiatus by adjusting valence band level (VBL) with conducting band level (CBL) bringing high suction of the exist radiance, which improves photo degeneration achievement of material oxides and composites made from polymers. They also studied the main applications of GO and RGO in engineering fields and summarized the usefulness of intercalation of GO and RGO in construction sectors. Moreover, many synthesis techniques lead to many types of GO. Therefore, in this chapter, the authors tried to collect most GO and RGO properties, structures, and applications.

Classical Building Materials

2016 ◽  
pp. 1-27 ◽  
Author(s):  
Anwar Khitab ◽  
Waqas Anwar
Keyword(s):  
Building Materials ◽  
Research Work ◽  
Chemical Properties ◽  
Building Blocks ◽  
Nano Technology ◽  
Advance Research ◽  
Physical And Chemical ◽  
Engineering Projects ◽  
Natural Characteristics ◽  
Heat Resisting Materials

Classical building materials are widely used in Civil Engineering projects. Many ancient generations used fire clay and stone as building blocks. The most common building materials today include stones, concrete, plastics, bitumen, glass, wood, metals, bricks, polymers, tiles and heat resisting materials. Current research work has come up with the considerable improvement in the natural characteristics of these materials. Glasses are available in more variety as they were 50 years ago. Similarly, concrete is now available in ultra-high strengths and even blast resistant form. Recently, use of nano-technology has emerged as a rapidly growing field; success of which is also highly dependent on the basic understanding of classical building materials. Advance research work including implementation of nanotechnology may come up with further improvements in the physical and chemical properties of these materials. This chapter would focus on classical materials in detail covering their physical and chemical characteristics, usages as well as economical suitability.

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