scholarly journals Mechanical Properties of Gypsum-PCM Composite Refined with the Acrylic Copolymer

2021 ◽  
Author(s):  
Krzysztof Powała ◽  
Andrzej Obraniak ◽  
Dariusz Heim
Keyword(s):  
Mechanical Properties ◽  
Energy Efficient ◽  
Building Materials ◽  
Strength Properties ◽  
Efficient Solutions ◽  
Point Of View ◽  
Construction Sector ◽  
Acrylic Copolymer ◽  
Endurance Tests ◽  
Change Material

Nowadays, the construction sector is changing rapidly towards more energy-efficient solutions. Many companies strive to improve the properties of building materials by reducing the weight of materials, increasing mechanical properties, and improving insulation properties. Therefore, to bring closer the problems that need to be solved, it was proposed to develop a new gypsum composite that will be used in a drywall. In addition, phase change material (PCM) and copolymer were used to improve thermal properties and tighten the final product against paraffin leakage. The main goal of the study was to check the mechanical properties. The results of endurance tests were presented. Based on that, it was determined that PCM affects the strength properties of the gypsum. In analyzing the obtained results, it can be stated from a mechanical point of view that to a certain extent, it was possible to confirm the correctness of using PCM in gypsum with an acrylic copolymer. The other part of the article presents the course of research and the results confirming the presented hypothesis.

Development of New Advanced Plasters with Waste Fibers Content

2018 ◽  
Vol 276 ◽  
pp. 248-253
Author(s):  
Jiří Zach ◽  
Jitka Peterková ◽  
Vítězslav Novák
Keyword(s):  
Mechanical Properties ◽  
Building Materials ◽  
Raw Materials ◽  
Cellulose Fibers ◽  
Positive Influence ◽  
Point Of View ◽  
Pet Bottles ◽  
Thermal Insulating ◽  
Insulating Properties ◽  
Recycled Waste

The paper deals with the possibilities of using secondary raw materials in the development of new advanced lightweight plasters. It was about fibers from recycled waste materials (waste paper, PET bottles, tyres) and recycled insulation (stone wool). The aim of adding fibers to these lightweight building materials was improvement of mechanical properties, improvement thermal insulation properties and reduction of crack sensitivity. It can be stated, based on the evaluation of the selected measurements, that both types of cellulose fibers and fibers from recycled tyres had positive influence on the mechanical properties, namely in the case of compressive strength. From the point of view of thermal insulating properties, it can be said that only 2 types of fibers have reduced the value of the thermal conductivity. They were mixtures with stone fibers and with recycled tyres fibers. Both of these mixtures also showed the lowest average values of bulk density. Based on the carried out research works can be it concluded that the use of recycled tyres fibers show as optimal.

Simulation of Various Wall and Window Glass Material for Energy Efficient Building Design

2016 ◽  
Vol 692 ◽  
pp. 9-16 ◽  
Author(s):  
Kiran Kumar Gorantla ◽  
Saboor Shaik ◽  
Ashok Babu Talanki Puttaranga Settee
Keyword(s):  
Energy Efficient ◽  
Building Materials ◽  
Window Glass ◽  
Building Design ◽  
Point Of View ◽  
Heat Gain ◽  
Concrete Walls ◽  
Building Models ◽  
Clear Glass ◽  
Reinforced Cement

Buildings consume huge amount of energy for forced ventilation and artificial day lighting. Use of appropriate material combinations for walls and window glass can help in reducing energy consumption for cooling and lighting. This paper presents the thermal properties of four building materials such as, laterite stone, dense concrete, burnt brick and mud brick. It also presents the experimentally measured optical properties of glass materials such as, clear glass, bronze glass, green glass and reflective. In this study building of size 5m X 5m X 3.2m with four wall materials and four glass materials were designed using design builder software. The thickness of the wall was considered as external wall with thickness 0.22m. All the walls covered with cement plaster on either side. Roof of the building is made of reinforced cement concrete and floor is dense concrete. Thermal analysis was carried out using by Energy plus software. Single sized glass windows were placed in south direction (Due to less heat gain in south direction) for Mangalore city (12.870N, 74.880E), Karnataka, India. Different window to wall ratios (20%, 40%, 60%, 80% and 100%) were maintained for buildings. Total eighty building models were investigated for heat gain into buildings. From the results, it is observed that irrespective of the window to wall ratio, mud brick walls with reflective window glass were observed to be energy efficient from the lower heat gain point of view, and laterite stone wall building with clear glass windows were observed to be the worst due to their higher heat gain values. At 60% window to wall ratio mud brick walls with reflective window glass have 24.93kWh heat gain and dense concrete walls with clear glass have 32.9 kWh heat gain. The results of the study help in establishing the best combination of wall and glass materials for minimum heat gain into buildings.

scholarly journals Synthesis and Characteristics of Local Fly Ash Based Geopolymers Mixed with Natural Aggregates

2019 ◽  
Vol 70 (4) ◽  
pp. 1262-1267 ◽  
Author(s):  
Dumitru Doru Burduhos Nergis ◽  
Petrica Vizureanu ◽  
Ofelia Corbu
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Flexural Strength ◽  
Alkaline Solution ◽  
Development Process ◽  
Rapid Development ◽  
Point Of View ◽  
Construction Sector ◽  
New Materials ◽  
Natural Aggregates

Global industrialization generates large amount of waste which strongly affects the depositing areas and the living creatures from the surroundings. In the same time, the construction sector meets an exponential development process, resulting in materials and construction areas increase. Therefore, the need of new materials was felt worldwide. One solution that knew a rapid development, especially in this sector, was to obtain new eco-friendly materials through a mechanism called geopolymerization. True this powerful chemical reaction between a waste, rich in aluminum and silicon, and a strong alkaline solution, a tetragonal structure of Al-O-Si is obtained that possess properties comparable to those of Portland cement-based concrete. In the present paper the effect of aggregates on local fly ash based geopolymers is analyzed from the structure and mechanical properties point of view. According to this study, the aggregates strongly influence the density, compression strength and flexural strength at any age of samples.

scholarly journals Effect of Fiber Reinforcement on the Compression and Flexural Strength of Fiber-Reinforced Geopolymers

2021 ◽  
Vol 11 (21) ◽  
pp. 10443
Author(s):  
Michał Łach ◽  
Bartłomiej Kluska ◽  
Damian Janus ◽  
Dawid Kabat ◽  
Kinga Pławecka ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Building Materials ◽  
Bending Strength ◽  
Strength Properties ◽  
Attractive Alternative ◽  
Reinforcing Fibers ◽  
Different Types ◽  
The Matrix ◽  
Glass Carbon

This work aimed to determine the effect of the addition of different types of reinforcing fibers on the strength properties of geopolymers such as flexural and compressive strength. Geopolymers are an attractive alternative to conventional binders and building materials; however, one of the main problems of their widespread use is their low resistance to brittle fracture. To improve the mechanical properties, reinforcement in the form of glass, carbon, and basalt fibers (as grids) was applied to geopolymers in the following work. Additionally, composites with these fibers were produced not only in the matrix of pure geopolymer but also as a hybrid variant with the addition of cement. Furthermore, basalt grids were used as reinforcement for geopolymers not only based on ash but also metakaolin. An additional variable used in the study was the molar concentration of the alkali solution (5 M and 10 M) for the different types of geopolymer samples. The mechanical properties of geopolymer materials and geopolymer–cement hybrids are the highest when reinforcement in the form of carbon fiber is used. Strength values for geopolymers reinforced with basalt mats depend on the number of reinforcement layers and the concentration of the alkaline solution used. All produced composites were tested for compressive strength and bending strength. When using basalt mesh, it was possible to achieve a bending strength of 12 MPa. The highest compressive strength that was achieved was the value of 66 MPa, while for samples not reinforced with fibers, only about 40 MPa was achieved.

A Study of the Influence of Strain Hardening and Precipitation Hardening Sequence on Development of Mechanical Properties of AlMgSi Conductor Alloys

2011 ◽  
Vol 690 ◽  
pp. 45-48
Author(s):  
Tadeusz Knych ◽  
Beata Smyrak ◽  
Piotr Osuch ◽  
Kinga Szajding
Keyword(s):  
Mechanical Properties ◽  
Precipitation Hardening ◽  
Power Transmission ◽  
Strength Properties ◽  
Point Of View ◽  
Artificial Ageing ◽  
Wire Rod ◽  
Study Results ◽  
The Impact ◽  
Almgsi Alloy

The paper focuses on 6xxx series AlMgSi conductor alloys. Such alloys are used for manufacturing of conductors for power transmission. Since the most current standards define as many as seven types of wires with various mechanical and electrical specifications, the existing philosophy of AlMgSi wires manufacturing technology for electrical applications has to be revised. Strength specifications of precipitation hardened AlMgSi alloys may be enhanced by strain and by precipitation hardening. Therefore from the scientific point of view identification seems to be relevant of the impact of the sequence of these mechanisms on development of final wire properties. In particular, this paper tries to answer the following question: Does the sequence of hardening mechanisms affect the development of mechanical properties of AlMgSi alloy wires? The paper presents results of a study of the impact of artificial ageing parameters of 6201 grade AlMgSi alloy wires on their final properties. The study results are presented and discussed in two parts. The first part addresses the impact of artificial aging temperature and duration on the strength properties of AlMgSi (grade 6201) alloy wire rod. The second part is focused on hardening development in the process of drawing of a AlMgSi wire made of the same alloy grade, subjected to different thermal treatments, the parameters of which have been selected based on analysis of the results of the first, wire-rod related, part of the study.

scholarly journals Mechanical properties of the gypsum composite reinforcement with wooden fibers

2019 ◽  
Vol 10 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Markéta Hošťálková ◽  
Nikola Vavřínová ◽  
Veronika Longauerová
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Shear Strength ◽  
Flexural Strength ◽  
Physical Properties ◽  
Building Materials ◽  
Strength Properties ◽  
Physical Parameters ◽  
Fibrous Materials ◽  
Mechanical And Physical Properties

The gypsum is one of the most often used materials in the civil engineering. Very often it is applied in the form of plasterboards without any reinforcement, for example, cladding boards are unusable as supporting construction. To improve the mechanical properties of plasterboards, fibrous materials such as cellulose or glass fiber are added. Reinforcement of gypsum with fibers improves in particular the flexural and shear strength. The main purpose of the research is to clarify whether natural wooden fibers could be used as the reinforced of composite gypsum building materials. Wooden fibers are used as a blown or board thermal insulation. This article presents the results of tests aimed at determining the mechanical and physical properties of gypsum composite reinforced with wooden fibers. The effect of the reinforcement on the strength properties as a compressive strength, flexural strength was verified on a series of test specimens. The results of the tests have shown that the reinforcing of gypsum composite has an impact on the mechanical-physical parameters.

scholarly journals The impact of radiant heat on various types of plasterboard walls

2021 ◽  
Vol 352 ◽  
pp. 00001
Author(s):  
Stanislava Gašpercová ◽  
Linda Makovická Osvaldová ◽  
Erik Richnavský
Keyword(s):  
Thermal Insulation ◽  
Fire Protection ◽  
Building Materials ◽  
Construction Materials ◽  
Green Building ◽  
Radiant Heat ◽  
Point Of View ◽  
Construction Sector ◽  
Almost All ◽  
The Impact

The future of the whole world focuses on reducing waste produced by people. As the construction sector is one of the biggest producers of waste, a great deal of effort has been made to introduce this trend in modern construction. The “green” building sector, therefore, draws attention to natural and recyclable building materials. These include natural thermal insulation such as cork, fiberboard, hemp insulation, and even sheep wool insulation. Almost all types of such insulation are made from waste materials which, were they not reused in the form of thermal insulation, would end up as municipal or biodegradable waste. At the same time, we should point out that almost all “green” construction materials are flammable. This feature is not very advantageous from the point of view of fire protection and it can significantly affect the fire safety of a construction. It is for this reason that the main objective of this research was to determine the impact of a radiant heat source on various types of thermal insulation used as plasterboard filling and to evaluate the possibilities of their use in sandwich constructions for fire protection purposes.

scholarly journals Preparation and Study of Resin Translucent Concrete Products

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Shen Juan ◽  
Zhou Zhi
Keyword(s):  
Mechanical Properties ◽  
Thermal Performance ◽  
Energy Efficient ◽  
Building Materials ◽  
Plain Concrete ◽  
Area Ratio ◽  
Green Energy ◽  
Light Transmittance ◽  
Energy Efficient Buildings ◽  
New Type

The development of new building materials is a crucial engine for promoting the development of green energy efficient buildings. In this paper, based on the excellent properties of light guiding of resin materials, a new type of resin translucent mortar-based concrete (RTMC) was researched; meanwhile, transmittance properties, mechanical properties, and thermal performance were studied, respectively. The results showed that the resin material possessed excellent light transmittance within the thickness of 100 mm, which can be as high as 93%. Moreover, when the area ratio was within 5%, the compressive strength of RTMC was close to that of plain concrete. Besides, RTMC had excellent thermal performance that the thermal conductivity of RTCM was 0.3815 w/(m·K), which was 60% lower than 0.89 w/(m·K) of plain concrete.

Caractérisation d'une maçonnerie composée d'éléments en aggloméré de chanvre

2004 ◽  
Vol 31 (3) ◽  
pp. 526-529 ◽  
Author(s):  
Pierre-Yves Bütschi ◽  
Christian Deschenaux ◽  
Buquan Miao ◽  
Narenda K Srivastava
Keyword(s):  
Mechanical Properties ◽  
Sustainable Development ◽  
Building Materials ◽  
Point Of View ◽  
Sound Insulation ◽  
Light Weight ◽  
Load Bearing ◽  
Masonry Construction ◽  
Wall Construction ◽  
Industrial Hemp

The tested masonry elements, made of an agglomeration of industrial hemp and inorganic binders, were prefabricated on a cement brick production with an objective to use them for light-weight load-bearing wall construction and for insulation purposes. The tests indicate that the load-bearing characteristics of such masonry construction is close to the present Swiss recommendations. Furthermore, the sound insulation characteristics are comparable to the numerous other traditional systems, but they are still not competitive compared to other existing systems from the point of view of thermal insulation.Key words: construction, brick, light weight, building materials, industrial hemp, mechanical properties, physical properties, sustainable development.

scholarly journals Development of cement-based mortars for 3D printing through wet extrusion

2019 ◽  
Author(s):  
Behzad Zahabizadeh ◽  
Vítor M. C. F. Cunha ◽  
João Pereira ◽  
Cláudia Gonçalves
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Building Materials ◽  
Added Value ◽  
Complex Geometries ◽  
Business Sector ◽  
Structural Elements ◽  
Construction Sector ◽  
Construction Methods ◽  
Wet Extrusion

<p>The construction sector is connoted as an extremely traditional business sector since long ago. However, due to the increase of the global competiveness, there is a demand on the development of new building materials and construction methods that can bring added value to the companies. The 3D concrete printing is a novel construction approach within digital construction that can offer a higher degree of optimization and flexibility for producing either structures or structural elements with complex geometries. One of the main challenges in the 3D concrete printing using wet extrusion is balancing properly the rheological and mechanical properties of the printable mixtures. In this study, several mixtures were developed and their capability for being used in 3D printing was assessed and discussed based on their rheological properties. The compressive strength of the matrices that could be properly printed are also presented.</p>

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