Influence of recycled polystyrene beads on cement paste properties

In order to keep up with the requirements of sustainable development, there is a growing interest towards reducing the energy consumption in the construction and rehabilitation of buildings and the promotion of recycling waste in building materials. The use of recycled polystyrene beads in cement-based materials composition constitutes a solution to improve the insulation in buildings. This allows also limiting landfill by reusing the polystyrene waste. The aim of this study is to compare some properties and performances of a cement paste containing polystyrene beads to a reference paste designed with only the same cement. An experimental campaign was conducted and the obtained results showed that adding recycled polystyrene beads to a cement paste improves its hygro-thermal properties. Further studies are however necessary to better understand the real role of the polystyrene beads in the heat and mass transfers.

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Influence of recycled polystyrene beads on cement paste properties

MATEC Web of Conferences ◽

10.1051/matecconf/201714901032 ◽

2018 ◽

Vol 149 ◽

pp. 01032

Author(s):

Maroua Maaroufi ◽

Akli Younsi ◽

Rafik Belarbi ◽

Armelle Nouviaire

Keyword(s):

Cement Paste ◽

Polystyrene Beads ◽

Paste Properties

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BiOBr Precursor Solutions Modified Cement Paste: The Photocatalytic Performance and Effects

Crystals ◽

10.3390/cryst11080969 ◽

2021 ◽

Vol 11 (8) ◽

pp. 969

Author(s):

Zhi Geng ◽

Lina Zhang ◽

Jin Wang ◽

Yanfeng Yu ◽

Guoling Zhang ◽

...

Keyword(s):

Photocatalytic Activity ◽

Cement Paste ◽

Photocatalytic Performance ◽

Performance Enhancement ◽

Environmental Pollutants ◽

Hydrothermal Conditions ◽

Curing Period ◽

Cement Based Materials ◽

Activity Enhancement

The potential of photocatalysts modified cement-based materials in degrading environmental pollutants is evident in previous studies, but the application of photocatalytic cement-based materials still appears limited in actual practice due to the dispersion effect. This work seeks to prepare photocatalytic cement paste by mixing cement with BiOBr precursor solutions in terms of the improvement of dispersion efficiency, and additional hydrothermal conditions provided by autoclaved curing period are required to activate the photocatalytic activity of photocatalysts crystals. The presence of BiOBr precursor solutions results in an increase of RhB degradation rate of up to 45.4% and the NOx removal efficiency was up to 4.4%, and the formation of BiOBr photocatalysts crystals is the main reason for photocatalytic performance enhancement. The morphology of photocatalysts and the pore size distribution of cement paste also contribute to the photocatalytic activity enhancement by the exposed surface of photocatalysts, which are supported by the analyses of Scanning Electron Microscope and Mercury Intrusion Porosimetry results. A new mechanism is suggested to explain the synergistic role of crystals and microstructure on the enhancement of photocatalytic activity with the extension of autoclaved curing time. As supports for photocatalysts, the development changes of compressive strength of cement paste are also discussed.

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EMPLOYMENT OF MAGNETIC WATER TREATMENT IN CONSTRUCTION

Journal of Engineering and Sustainable Development ◽

10.31272/jeasd.25.4.1 ◽

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.

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Security Design System of Prison Architecture Based on New Materials

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.680.557 ◽

2014 ◽

Vol 680 ◽

pp. 557-560

Author(s):

Wang Lin

Keyword(s):

Sustainable Development ◽

Building Materials ◽

Security System ◽

Design System ◽

Security Design ◽

New Materials ◽

Security Systems ◽

High Quality ◽

Safety Measures

This paper discusses empirical findings and theories about prison architecture security system and security fence material. As advanced security systems and high quality materials became increasingly significant for prison architecture. The prison insecurity fence design and lag behind materials consume use results in threat of jail safety, which implies that scholar focus on such security design system is necessary. Few people, therefore, doubt the value of new building materials and financial theory to justify prison security system as enhance safeguarding measure. Most scholars of penology promoted consensus on application of new materials can enhance the performance of prison fences, which focus on the security aspects of prison architecture, and this is case studies on the role of security design system and new materials reuse in prison architecture, solutions for make security sustainable development in a national prison system. Thus, there is a continuing need to carry out well-designed research on this question as improve the safety measures. Conclusions and directions for further research are provided.

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Understanding of Construction Product Assessment Issues and Sustainability among Investors, Architects, Contractors, and Sellers of Construction Products in Poland

Energies ◽

10.3390/en14071941 ◽

2021 ◽

Vol 14 (7) ◽

pp. 1941

Author(s):

Jacek Michalak ◽

Bartosz Michałowski

Keyword(s):

Sustainable Development ◽

Building Materials ◽

Sustainable Use ◽

Further Education ◽

Equal Treatment ◽

Environmental Product Declaration ◽

Construction Products ◽

Product Assessment ◽

Construction Product

The building sector is one of the most critical branches of the economy influencing global warming today. Following the European Union’s Construction Products Regulation (CPR), the sustainable use of natural resources in construction is one of the seven basic buildings’ requirements. However, due to the lack of provisions in this regard, construction products are not yet subject to mandatory assessment and verification of the constancy of performance in this area. The paper presents the research results with the participation of 842 respondents who are investors, architects, contractors, and sellers of building materials. The analysis of their perceptions of issues related to the term sustainable development and knowledge of selected documents functioning in construction is presented. The share of people who correctly assigned the term sustainable development to equal treatment of environmental protection, economic development, and social development ranged between 52.5% and 65.7%. Knowledge of people associated with construction about the role of the declaration of performance (DoP) of construction products is high (from 73.9% to 99.4% correct answers). For Environmental Product Declaration (EPD), lower knowledge of this document’s role was noted, from 24.1% to 56.5% of correct answers. The obtained results indicate the need for further education.

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The Role of Customary Law in Sustainable Development

10.1017/cbo9780511550621 ◽

2006 ◽

Cited By ~ 4

Author(s):

Peter Orebech ◽

Fred Bosselman ◽

Jes Bjarup ◽

David Callies ◽

Martin Chanock ◽

...

Keyword(s):

Sustainable Development ◽

Customary Law

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Role of government financial control in national sustainable development

PsycEXTRA Dataset ◽

10.1037/e503592014-021 ◽

2013 ◽

Author(s):

Andriy Lyubenko

Keyword(s):

Sustainable Development ◽

Financial Control ◽

Role Of Government

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Role of Teachers in Building the Concept of Sustainable Development: Success or Failure

Journal of Applied Research and Multidisciplinary Studies ◽

10.32350/jarms/2020/0101/906 ◽

2020 ◽

Vol 1 (1) ◽

Author(s):

Ayaz Muhammad Khan ◽

Amber Jamshaid ◽

Tayyibah Roohi ◽

Amna Ramzan

Keyword(s):

Sustainable Development ◽

Primary School ◽

Sampling Technique ◽

School Teachers ◽

Primary School Teachers ◽

Primary Level ◽

Significant Difference ◽

Role Of Teachers ◽

Major Factors

Sustainable Development (SD) is a rich, challenging and thought-provoking construct in social sciences. The main purpose of this paper was to identify and explore the role played by primary school teachers in building up the idea of sustainable development (SD) among students. This paper was intended to identify that how a teacher can successfully execute the concept of SD by influencing students’ minds at the primary level. Quantitative survey technique were utilized for data collection. All the primary school teachers of Lahore division comprised the population of the study. Through multistage sampling technique, 352 primary school teachers were selected as participants of the study. A self-developed SD questionnaire incorporating four major factors (teachers’ awareness, pedagogy, curricular and co-curricular activities) with Cronbach’s alpha value = .93 was used to measure the role of teachers in building the sustainability concept among students at primary level. The results indicated a significant mean score difference among SD scores of teachers, sector wise (private and public). Furthermore, the results also reconnoitered the significant difference (p=.04) between the mean scores of female and male teachers in building up the SD concept in students’ minds.

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