scholarly journals UTILIZATION OF GRAPHENE OXIDE IN BUILDING MATERIALS

2021 ◽  
Vol 25 (6) ◽  
pp. 20-31
Author(s):  
Rawaa Abdulla Al-Safy ◽  
Keyword(s):  
Graphene Oxide ◽  
Construction Industry ◽  
Building Materials ◽  
Template Effect ◽  
Polymeric Matrices ◽  
Sudden Failure ◽  
Uniform Dispersion ◽  
Cement Based Materials ◽  
The Impact ◽  
Storage Energy

Cement-based materials (CBM) is one of the most commonly used building materials. Due to their brittle nature (sudden failure, low tensile strength, low resistant to crack), CBMs were modified through the addition of various traditional fillers/ reinforcement such as fibres and supplementary cementutious materials. Advanced modifiers/fillers such as Graphene-based nanomaterials (GBM) were utilized due to their superior properties in upgrading properties of CBM. GBM have been firstly used to enhance various polymeric matrices for storage energy, sensors and bio-applications. Following that, GBM were utilized in CBM with remarkable improvements in properties. In the current paper, an overview on the synthesis and structure of one type of GBM; namely graphene oxide (GO) was presented. The impact of GO on properties of CBM was addressed. One of the most observations from the highlighted published work was that the enhancements in CBM properties were linked to the uniform dispersion of functionalized GO and template effect of GO in CBM. Although GO with its attractive properties in upgrading properties of CBM, the usage of GO in construction industry is still not at the same demand level as in other applications and further investigations are needed in this regard.

Investigating the impact of inflation on building materials prices in construction industry

2020 ◽  
Vol 32 ◽  
pp. 101485 ◽  
Author(s):  
Muhammad Ali Musarat ◽  
Wesam Salah Alaloul ◽  
M.S. Liew ◽  
Ahsen Maqsoom ◽  
Abdul Hannan Qureshi
Keyword(s):  
Construction Industry ◽  
Building Materials ◽  
The Impact

“Cement-Free Product” for Settlement of Ceramic Tiles: An Approach for Greener Construction

2014 ◽  
Vol 805 ◽  
pp. 403-408
Author(s):  
Otávio Luiz do Nascimento ◽  
Alexandra Ancelmo Piscitelli Mansur ◽  
Herman Sander Mansur
Keyword(s):  
Carbon Dioxide ◽  
Construction Industry ◽  
Free Product ◽  
Ceramic Tile ◽  
Carbon Dioxide Emissions ◽  
Building Materials ◽  
Global Climate ◽  
Public Awareness ◽  
Ceramic Tiles ◽  
The Impact

Increased public awareness of the threats posed by global warming has led to greater concern over the impact of anthropogenic carbon emissions on the global climate associated with the level of carbon dioxide (CO2) in the atmosphere. Hence, without radical market, technological, and cultural changes, the CO2 concentrations are expected to rise to unbearable levels within just few decades ahead. The production of cement is estimated to be responsible for approximately 5% of the global carbon dioxide emissions. Consequently, aiming for creating a more sustainable world, engineers and scientists must develop and put into use greener building materials that may revolutionize the entire construction industry. This study presents an innovative product for settlement of ceramic tiles as a potential alternative for replacing the conventional cement based mortar in some specific building applications. Essentially, the novel system is based on a double face polymer-adhesive sheet (“cement-free product”). Thus, the main goal was to evaluate the performance and estimate the durability of the developed system. Pull-off tests were conducted in order to compare this new system to the traditional one, with polymer modified mortar, under different procedures and conditions of cure. In addition, both systems were modeled using Finite Element Method (FEM) to obtain the stresses at the interface between ceramic-tile and adhesive. Based on the results, the recommended limits of bond strength for the innovative “cement-free product” of ceramic tile installation could be lower than those specifications used for the equivalent mortar systems. Therefore, these results give some preliminary evidence that by using the new “cement-free” product for ceramic-tile installation may lead to some increase in the productivity and, more important, in the sustainability of a relevant sector of the construction industry.

scholarly journals Crossover Effect in Cement-Based Materials: A Review

2019 ◽  
Vol 9 (14) ◽  
pp. 2776 ◽  
Author(s):  
Sumra Yousuf ◽  
Payam Shafigh ◽  
Zainah Ibrahim ◽  
Huzaifa Hashim ◽  
Mohammad Panjehpour
Keyword(s):  
Compressive Strength ◽  
Construction Industry ◽  
Building Materials ◽  
Cement Hydration ◽  
Curing Temperature ◽  
Future Research ◽  
Hydration Products ◽  
Crossover Effect ◽  
Cement Based Materials ◽  
Mineral Compositions

Cement-based materials (CBMs) such as pastes, mortars and concretes are the most frequently used building materials in the present construction industry. Cement hydration, along with the resulting compressive strength in these materials, is dependent on curing temperature, methods and duration. A concrete subjected to an initial higher curing temperature undergoes accelerated hydration by resulting in non-uniform scattering of the hydration products and consequently creating a great porosity at later ages. This phenomenon is called crossover effect (COE). The COE may occur even at early ages between seven to 10 days for Portland cements with various mineral compositions. Compressive strength and other mechanical properties are important for the long life of concrete structures, so any reduction in these properties is of great concern to engineers. This study aims to review existing information on COE phenomenon in CBMs and provide recommendations for future research.

On the Assessment Tools of Green Building Materials

2012 ◽  
Vol 193-194 ◽  
pp. 341-344
Author(s):  
Xin Ming Yan ◽  
Da Lu Tan ◽  
Hong Jia
Keyword(s):  
Construction Industry ◽  
Building Materials ◽  
Green Building ◽  
Assessment Tools ◽  
International Construction ◽  
Advantages And Disadvantages ◽  
Green Building Materials ◽  
Key Factor ◽  
The Impact ◽  
Resource And Environment

The impact of the construction industry on the consumption of natural resource and environment cannot be ignored. There is no doubt that green building will be a trend in the international construction industry. It is crucial to choose the appropriate green building materials, because it acts as key factor to the development of green building. With the brief introduction of two mainstream assessment tools of green building materials in the world and two main evaluation tools that are used in China as well as their advantages and disadvantages, this article is expected to serve as the reference for development of green building materials and the assessment tools in China.

scholarly journals INTERNATIONAL TRENDS AND CURRENT CHALLENGES OF CONSTRUCTION MATERIALS MARKET DEVELOPMENT

2020 ◽  
Author(s):  
Yulia Orlovska ◽  
◽  
Daria Havrylenko ◽  
Keyword(s):  
Real Estate ◽  
Construction Industry ◽  
Information And Communication Technologies ◽  
Building Materials ◽  
Construction Materials ◽  
Construction Sector ◽  
International Trends ◽  
The World ◽  
The Impact ◽  
Construction Services

The main international trends in the world market of construction materials and services have been analyzed. The dynamics of world GDP and exports of construction services for the period 2000-2019 has been studied and a conclusion is made on the impact of economic crises on their growth rates. It has been determined that the dynamics of world exports of construction services is characterized by high instability with peaks of growth and decline, and is more sensitive than GDP growth. It has been noted that overcoming the crisis in the export sector of construction services takes more time and occurs with an approximate two-year time lag compared to GDP dynamics. The share of the construction industry in the world GDP by the degree of development has been analyzed. The reasons for the decline in the share of the construction industry in countries with economies in transition have been substantiated. It has been noted that in the developed countries the share of the construction sector is accounted for by real estate management activities related to maintenance, rent, purchase and sale and other transactions with land and real estate. The forecast values of growth of the market of building materials and services till 2030 have been given. The essence of the term «wide construction» has been revealed and the structure of this sector in different countries of the world is shown. The main exporters in the world construction market have been given and the structural distribution of the largest construction companies in the world ranking by country of origin has been analyzed. The dynamics of income level in the construction industry market for the period 2011-2018 has been studied. It has been noted that an important area of the construction sector is the market of roofing and facade materials and the world's largest companies for the production of this type of construction materials have been revealed. Conclusions on the essence of global transformations of the market of building materials and services have been made, and also it has been defined that they are caused by transnationalization of corporate structure of the market, influence of scientific and technical progress and information and communication technologies on world centers as well as the emergence of the concept of «sustainable construction» in the course of humanity for sustainable development.

High Strain Rate Behavior of Epoxy Graphene Oxide Nanocomposites

2018 ◽  
Vol 10 (07) ◽  
pp. 1850072 ◽  
Author(s):  
Suneev Anil Bansal ◽  
Amrinder Pal Singh ◽  
Suresh Kumar
Keyword(s):  
Graphene Oxide ◽  
High Strain Rate ◽  
Strain Rate ◽  
Impact Loading ◽  
High Strain ◽  
Chemical Oxidation ◽  
Uniform Dispersion ◽  
Mixing Method ◽  
Strain Rate Loading ◽  
The Impact

The present work investigates the novel impact loading response of two-dimensional graphene oxide (GO) reinforced epoxy nanocomposites at high strain rate. The testing was performed up to 1000[Formula: see text]s[Formula: see text] of high strain rate, where maximum damage occurs during the impact loading conditions. The Split Hopkinson Pressure Bar (SHPB) was used for the impact loading of the composite specimen. The nanofiller material GO was synthesized by chemical oxidation of graphite flakes used as the precurser. Synthesized GO was characterized using FTIR, UV-visible, XRD, Raman Spectroscopy and FE-SEM. Solution mixing method was used to fabricate the nanocomposite samples having uniform dispersion of GO as confirmed from the SEM images. Strain gauges mounted on the SHPB showed regular signal of transmitted wave during high strain rate testing on SHPB, confirming the regular dispersion of both the phases. Results of the transmission signal showed that the solution mixing method was effective in the synthesis of almost defect-free nanocomposite samples. The strength of the nanocomposite improved significantly using 0.5[Formula: see text]wt.% reinforcement of GO in the epoxy matrix at high strain rate loading. The epoxy GO nanocomposite showed a 41% improvement in maximum stress at 815[Formula: see text]s[Formula: see text] strain rate loading.

scholarly journals EMPLOYMENT OF MAGNETIC WATER TREATMENT IN CONSTRUCTION

2021 ◽  
Vol 25 (4) ◽  
pp. 1-12
Author(s):  
Rawaa A. Al-Safy ◽  
Keyword(s):  
Building Materials ◽  
Water Clusters ◽  
Hydration Process ◽  
Cement Particle ◽  
Construction Sites ◽  
Cement Based Materials ◽  
Time Strength ◽  
The Impact ◽  
Magnetic Water

Magnetic treatment (MT) is one of the interested techniques that have been widely used in various aspects of life due to its positive effectiveness on the properties of water when utilized. Construction sector received great attention by researchers in order to employ magnetic water (MW) in the production of various building materials especially cement-based materials. This is due to the role of water is involved directly in the hydration process of the cement as well as curing process. The effectiveness of using MW came from the influence of magnetic field (MF) on physical properties of water molecular such as surface tension. Break down in the size of water clusters, therefore, is occurred which increases the activity of water molecular to penetrate the cement particle easily to involve in the hydration process. Various parameters may affect the magnetization process such as time, strength of MF and speed of water through the MF. In the current paper, the impact of using MW in the production of various construction and building materials that based on cement is addressed to clarify the actual need in adopting such an attractive technology to magnetize the water to be used in mixing and curing cement-based materials to construct sustainable concrete structures in construction sites.

scholarly journals Amino Functionalization of Reduced Graphene Oxide/Tungsten Disulfide Hybrids and Their Bismaleimide Composites with Enhanced Mechanical Properties

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1199 ◽  
Author(s):  
Liulong Guo ◽  
Hongxia Yan ◽  
Zhengyan Chen ◽  
Qi Liu ◽  
Yuanbo Feng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Tungsten Disulfide ◽  
Amino Groups ◽  
Uniform Dispersion ◽  
Reduced Graphene ◽  
Suitable Amount ◽  
The Stability ◽  
The Impact

A novel graphene-based nanocomposite particles (NH2-rGO/WS2), composed of reduced graphene oxide (rGO) and tungsten disulfide (WS2) grafted with active amino groups (NH2-rGO/WS2), was successfully synthesized by an effective and facile method. NH2-rGO/WS2 nanoparticles were then used to fabricate new bismaleimide (BMI) composites (NH2-rGO/WS2/BMI) via a casting method. The results demonstrated that a suitable amount of NH2-rGO/WS2 nanoparticles significantly improved the mechanical properties of the BMI resin. When the loading of NH2-rGO/WS2 was only 0.6 wt %, the impact and flexural strength of the composites increased by 91.3% and 62.6%, respectively, compared to the neat BMI resin. Rare studies have reported such tremendous enhancements on the mechanical properties of the BMI resin with trace amounts of fillers. This is attributable to the unique layered structure of NH2-rGO/WS2 nanoparticles, fine interfacial adhesion, and uniform dispersion of NH2-rGO/WS2 in the BMI resin. Besides, the thermal gravimetrical analysis (TGA) revealed that the addition of NH2-rGO/WS2 could also improve the stability of the composites.

scholarly journals A Review on Application of Formaldehyde in Cement-Based Materials

2021 ◽  
Keyword(s):  
Construction Industry ◽  
Construction Material ◽  
Cementitious Materials ◽  
Flow Strength ◽  
Durability Properties ◽  
Cement Based Materials ◽  
Strength And Durability ◽  
The Impact ◽  
Flooring Materials ◽  
Nose And Throat

Abstract. Formaldehyde is environment contamination, which causes irritation in the eyes, nose, and throat with concentration above 1.0ppm. But still, it is used as a construction material as an admixture and furthermore to make paints, adhesives, pressed wood, and flooring materials, etc. This paper reviews the impact of formaldehyde in the cement on flow, strength, and durability properties. In this most of the researchers studied the water reducing nature of formaldehyde-based cementitious materials (FBCM) because of its repulsive property, that can ensure improved workability and provides good mechanical strength. Finally, the challenges in the application of formaldehyde in cement-based materials are discussed to conclude some future scope in the field of the construction industry to use formaldehyde in cement.

LATE AND NON-PAYMENTS ISSUES IN THE MALAYSIAN CONSTRUCTION INDUSTRY: PERSPECTIVE OF BUILDING MATERIAL SUPPLIERS

2020 ◽  
Vol 6 (1) ◽  
pp. 39
Author(s):  
Mohd Fisal Ishak ◽  
Kartina Alauddin ◽  
Mohd Shahrol Hafiz Ibrahim
Keyword(s):  
Construction Industry ◽  
Cash Flow ◽  
Financial Management ◽  
Building Material ◽  
Building Materials ◽  
Management Team ◽  
Flow Management ◽  
Cash Flow Management ◽  
Main Effect ◽  
Klang Valley

Payment in the Malaysian construction industry has generally been an issue of concern. Late and non-payment problem is endemic in construction and needs to be addressed. The aim of this study is to investigate the issues related to late and non-payment based on the building materials suppliers’ perspective. Questionnaires were distributed to suppliers of building materials in the Klang Valley. Findings from the study shows the main cause of late and non-payment is the paymaster’s poor financial management while the main effect of late and non-payment is problem with the cash flow.  The most recommended possible solution to cope with the issue is for the paymaster to conduct training on financial and cash flow management to the management team in the company.  

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