Adhesives for the Installation of Cast Basalt Elements on Metal and Comparison of Properties when Using Different Types of Fillers

2021 ◽  
Vol 898 ◽  
pp. 35-41
Author(s):  
Jakub Hodul ◽  
Tomáš Žlebek ◽  
Lenka Mészárosová ◽  
Aleš Jakubík ◽  
Rostislav Drochytka
Keyword(s):  
Construction Industry ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Mineral Admixtures ◽  
Maximum Efficiency ◽  
Organic Additives ◽  
Metal Base ◽  
Secondary Raw Materials ◽  
Ecological Benefit ◽  
Different Types

The polymeric adhesives for the installation of basalt elements on a metal base are designed primarily for environments with increased chemical and mechanical stress. They are composed of polymer resins (epoxy, polyurethane) as binders, as well as organic additives and mineral admixtures that mainly fulfill the function of filler. In all sectors of today's construction industry, maximum efficiency in the production of materials is required for sustainability purposes, which, however, must never be at the expense of the quality or the required performance. Due to these requirements, great emphasis is placed on the maximum use of secondary raw materials. Talc is used as the primary filler for polymer adhesives. Sawdust, tire rubber, and fly ash are used as secondary raw materials. The use of these in building supplies can positively affect some physical and mechanical properties of polymeric adhesives. Also, the use of secondary raw materials has the above-mentioned ecological benefit. Basic properties, such as bulk density and adhesion to both metallic and basalt elements, were monitored. The details of the cohesion of the adhesive with the bonded material, as well as the distribution of secondary raw materials in the polymer matrix, were assessed microscopically.

scholarly journals Distribution of the components of the building mixture in the presence of secondary raw materials during rotary mixing

2020 ◽  
Vol 220 ◽  
pp. 01060
Author(s):  
Anna Kapranova ◽  
Daria Bahaeva ◽  
Dmitry Stenko ◽  
Alexander Vatagin ◽  
Anton Lebedev ◽  
...  
Keyword(s):  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Distribution Functions ◽  
Stochastic Description ◽  
Rarefied Flows ◽  
Secondary Raw Materials ◽  
Characteristic Angle ◽  
Two Stages ◽  
The Given ◽  
Number Of Particles

The purpose of this study is a stochastic description of the distribution of solid dispersed components, including those from secondary raw materials, according to the characteristic angle of scattering ϴij when receiving a construction mixture at the first stage of operation of the rotary apparatus. Two stages of the formation of rarefied flows are assumed: when scattering particles of components by elastic blades of a rotating drum and when interacting with the baffle surface. Modeling method this is energy method of Klimontovich Yu.L. The analysis of the efficiency of the first stage (rotary mixing) is carried out based on the obtained distribution functions of the number of particles of bulk components over the scattering angle, taking into account their physical and mechanical properties and a variety of design and operating parameters of the apparatus. The bulk of the particles of the mixed components are scattered at the initial angles of rotation of the mixing drum, when the deformation of the elastic blades is most significant. This is accompanied by the characteristic first bursts of the obtained distribution curves (ϴij< 0.1 rad) for the number of particles of the tested bulk materials at the given ranges of parameters.

scholarly journals Sustainability Potential Evaluation of Concrete with Steel Slag Aggregates by the LCA Method

2020 ◽  
Vol 12 (23) ◽  
pp. 9873
Author(s):  
Vojtěch Václavík ◽  
Marcela Ondová ◽  
Tomáš Dvorský ◽  
Adriana Eštoková ◽  
Martina Fabiánová ◽  
...  
Keyword(s):  
Life Cycle ◽  
Construction Industry ◽  
Raw Materials ◽  
Steel Slag ◽  
Physical And Mechanical Properties ◽  
Partial Replacement ◽  
Utilization Rate ◽  
Natural Aggregate ◽  
Concrete Production ◽  
Natural Aggregates

Sustainability in the construction industry refers to all resource-efficient and environmentally responsible processes throughout the life cycle of a structure. Green buildings may incorporate reused, recycled, or recovered materials in their construction. Concrete is as an important building material. Due to the implementation of by-products and waste from various industries into its structure, concrete represents a significant sustainable material. Steel slag has great potential for its reuse in concrete production. Despite its volume changes over time, steel slag can be applied in concrete as a cement replacement (normally) or as a substitute for natural aggregates (rarely). This paper focused on an investigation of concrete with steel slag as a substitute of natural gravel aggregate. Testing physical and mechanical properties of nontraditional concrete with steel slag as a substitute for natural aggregates of 4/8 mm and 8/16 mm fractions confirmed the possibility of using slag as a partial replacement of natural aggregate. Several samples of concrete with steel slag achieved even better mechanical parameters (e.g., compressive strength, frost resistance) than samples with natural aggregate. Moreover, a life cycle assessment (LCA) was performed within the system boundaries cradle-to-gate. The LCA results showed that replacements of natural aggregates significantly affected the utilization rate of nonrenewable raw materials and reduced the overall negative impacts of concrete on the environment up to 7%. The sustainability indicators (SUI), which considered the LCA data together with the technical parameters of concrete, were set to evaluate sustainability of the analyzed concretes. Based on the SUI results, replacing only one fraction of natural gravel aggregate in concrete was a more sustainable solution than replacing both fractions at once. These results confirmed the benefits of using waste to produce sustainable materials in construction industry.

SIFAT FISIK DAN MEKANIK PAPAN PARTIKEL DARI LIMBAH PLASTIK JENIS HDPE (High Density Polyetylene) DAN RANTING/CABANG KARET (Hevea brasiliensis Muell.Arg)

2011 ◽  
Vol 3 (1) ◽  
pp. 7
Author(s):  
Sari Mirad Noor
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Raw Materials ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Plastic Waste ◽  
High Density ◽  
Different Types ◽  
Materials Used ◽  
The Impact

The need of log increace rapidly, mean while forest product decrease, so efficiency on wood process should be done wisely, in the other hand plastic waste is uncompossed material, become an environmental problems. This research aims to determine the impact of particles of type HDPE plastic wastes and twigs/branches of rubber on some physical and mechanical properties of wood. Physical properties have been tested for water content, density, thickness, and water absorption. Although mechanical properties tests were tough Broken/Module of Rufture (MOR) and the preservation of architecture/modulus of elasticity (MOE).     The raw materials used are polyethylene of high density of waste plastic and rubber adhesive urea formaldehyde branch branch. Experimental design used the randomized Completely Design (RCD) 5 x 4, in which each treatment became much like 5 times replicated).The treatment used is the diversity of the composition of the waste of plastic of different types of polyethylene of high density provides a significant effect on the content of water, water absorption, the density and the development of thickness. With regard to the persistence and the fracture of the arch determination not to give a significant effect.Keywords: physical and mechanical properties, particle board, HDPE plastic waste, branch/twig of  rubber.

Experiment for the Mix Proportion Design of Green and Self-Compacting C40 Concrete

2013 ◽  
Vol 634-638 ◽  
pp. 2680-2683
Author(s):  
Sheng Ju Zhang ◽  
Xin Gang Wang ◽  
Su Rui Wang
Keyword(s):  
Construction Industry ◽  
Coarse Aggregate ◽  
Volume Fraction ◽  
Raw Materials ◽  
The Self ◽  
Mineral Admixtures ◽  
Special Significance ◽  
Self Compacting Concrete ◽  
Green Concrete ◽  
Mix Proportion

The self-compacting concrete is playing more and more important role in the construction industry with the advantages of greater mobility, better stability, and excellent character of filling the gap through capacity. There are different raw materials and construction conditions in each region, so, the research and development of the self-compacting concrete has a special significance according to the specific circumstances of each region. In this study, the parameters of the volume of coarse aggregate, mortar volume, the volume fraction of the sand, the mineral admixtures ash and cementatious coefficient were selected and calculated, and the C40 self-compacting green concrete was successfully configured.

scholarly journals Using secondary raw materials in construction of buildings with account taken of environmental standards

Vestnik MGSU ◽  
2021 ◽  
pp. 186-201
Author(s):  
Elena A. Sukhinina
Keyword(s):  
Construction Industry ◽  
Raw Materials ◽  
Environmental Standards ◽  
Recycled Materials ◽  
Environmental Certification ◽  
Secondary Raw Materials ◽  
Management Actions ◽  
Production And Consumption ◽  
Legislative Framework ◽  
Consumption Waste

Introduction. The article addresses the problem of irrational treatment of solid municipal, production and consumption waste in Russia, as well as the prospects of using secondary raw materials in the construction of buildings. The research is focused on environmental standards, environmental certification systems in the construction industry, as well as recycled materials. The study encompasses the construction of buildings using recycled materials, taking into account the requirements set in environmental standards. Materials and methods. The article presents several types of secondary raw materials and an overview of sustainable approaches to the construction of buildings using recycled materials in Russia and abroad. Most widely spread construction technologies, used to build houses using secondary raw materials, are described. An environmentally friendly facility constructed in Russia using secondary raw materials is described as an illustration. Results. The state of the Russian legislative framework governing the treatment of solid municipal, construction, and consumption waste and the requirements of international and Russian environmental standards applicable to buildings are analyzed. The percent ratio of waste management actions is determined in relation to other requirements set by environmental certification systems applicable to real estate items. Conclusions. A new classification of construction products made of secondary raw materials is presented. Conclusions are made about the feasibility of reusing solid household, industrial and consumption waste in the construction industry. The need to revise environmental standards in Russia is identified. The Russian environmental standards should have a larger number of criteria determining the rational treatment of solid municipal, construction, and consumption waste as well as the use of products made of secondary raw materials.

Secondary Raw Materials Obtained from Solar Panels and their Use in Material Engineering

2015 ◽  
Vol 1100 ◽  
pp. 207-210
Author(s):  
Jana Hodná ◽  
Ámos Dufka ◽  
Vit Petranek
Keyword(s):  
Construction Industry ◽  
Raw Materials ◽  
Solar Panels ◽  
Secondary Raw Materials ◽  
Material Engineering ◽  
The Way

The paper describes manufacture, use and subsequent recycling method in several types of solar panels. The possibility of using secondary raw materials incurred during recycling is also mentioned – these materials have not found their application so far and their final use is not being dealt. Within the research conducted at BUT, the way of using the secondary raw materials obtained from solar panels in the construction industry is being examined, with a focus on industrial polymer floorings.

Lightweight Aggregate Shotcrete: Part 1

2019 ◽  
Vol 815 ◽  
pp. 195-202
Author(s):  
Wen Hui Bian ◽  
Peng Cheng Li ◽  
Chang He Bai
Keyword(s):  
Mechanical Properties ◽  
Silica Fume ◽  
Physical And Mechanical Properties ◽  
Lightweight Aggregate ◽  
Mineral Admixture ◽  
Mineral Admixtures ◽  
Nano Silica ◽  
Different Types ◽  
Preliminary Research ◽  
The Difference

In this paper, preliminary research on lightweight aggregate shotcrete is carried out. The main discussion is the pumpability and sprayability of light aggregate injection by single-mixed and complex-doped mineral admixture, and the different dosages and different types are studied. The effect of mineral admixture on the physical and mechanical properties of lightweight aggregate shotcrete. The results show that the small amount of fly ash, silica fume and nano-silica can prevent the segregation and bleeding of the mixture. With the increase of the content of silica fume and nano-silica, the pumpability can be reduced. At the same time, the sprayability is increased. It has also been found that, due to the difference in particle size, the mutual complementation of particles between the complex mineral admixtures in terms of physical and mechanical properties results in a significant increase in sprayability and strength.

Physical and Mechanical Properties of Concrete Using Local Secondary Raw Materials

2020 ◽  
Vol 784 (9) ◽  
pp. 9-14
Author(s):  
A.S. Sidorova ◽  
◽  
S.G. Antsupova ◽  
A.L. Popov ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Secondary Raw Materials

scholarly journals Disposal of Mining Waste: Classification and International Recycling Experience

2018 ◽  
Vol 41 ◽  
pp. 02012 ◽  
Author(s):  
Mourad Samir ◽  
Faruz Alama ◽  
Paul Buysse ◽  
Tomas van Nylen ◽  
Oleg Ostanin
Keyword(s):  
Mechanical Properties ◽  
Construction Industry ◽  
Building Materials ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Industrial Wastes ◽  
Waste Products ◽  
Waste Classification ◽  
Additional Processing ◽  
Almost All

The main directions of mining and industrial wastes’ utilization are the production of building materials, their use in the construction industry without additional processing, and also the production of metals from metal-containing raw materials. It should be noted that current waste is preferable for the production of building materials, since they preserve the primary physical and mechanical properties and chemical composition and, moreover, can reach the consumer bypassing all other steps that are mandatory for waste consolidated (transportation, storage, etc.). For the production of building materials, not less than 30% of overburden and refinement tailings are suitable, almost all metallurgical and fuel slags, waste products of fertilizers and building materials. Even larger amounts of waste can be used for various laying and burial works (construction of road bases and dams, filling of worked out areas, leveling of the relief).

scholarly journals Application of mineral admixtures and steel fibers in experimental compositions for reactive powders concrete

2021 ◽  
Vol 10 (1) ◽  
pp. e52610111910
Author(s):  
João Victor da Cunha Oliveira ◽  
Frankslale Fabian Diniz de Andrade Meira ◽  
Kennedy Flávio Meira de Lucena
Keyword(s):  
Thermal Treatment ◽  
Physical And Mechanical Properties ◽  
Cement Industry ◽  
Steel Fibers ◽  
Mineral Admixtures ◽  
Architectural Elements ◽  
Different Types ◽  
Useful Life ◽  
Two Stages ◽  
Sanitation Infrastructure

Concrete is a material used in various applications, involving paving, sanitation, infrastructure and superstructure works, dams, bridges, and architectural elements, but for certain applications their physical and mechanical properties are affected by intense degradation agents, motivating the search for artifacts that improve these properties and increase the useful life and durability of matrix materials cement industry. The objective of this work is to clarify the influence of different mix of superplasticizer, steel fibers, water/cement factor, different types of mineral admixtures, besides the type of thermal treatment and method of cylindrical concrete molds of reactive powders, evaluating the resistance to axial compression at the ages of 7 and 14 days. 17 compositions were defined, by mass, for the manufacture of concretes, divided into two stages: the first composed of 10 compositions, and the second by 7 compositions. It was used CP-V ARI cement, sand, metakaolin, silica fume, superplasticizer and kneading water with temperature between 1 and 3°C. After the conformation of the cylindrical molds of dimensions 5x10cm with the aid of a portable immersion vibrator, the specimens were unmolded after 24 hours and received thermal treatment with periods of pre-cure and isotherm that varied according to the defined trait. According to the results obtained, the reduction of the w/c factor and the superplasticizer additive presented higher resistance to compression, however, this reduction in an excessive way impairs the hydration process, implying in the incomplete hydration of all the cement particles, resulting in less resistance. It was observed that the application of thermal treatment and densification by means of layer immersion vibrators acted as essential factors in the increase of the resistances, and that the isotherm time of the composite corroborates the respective increase, until its stabilization, in the temperatures studied.

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