scholarly journals THE INFLUENCE OF THE COMPOSITION OF MINERAL WATERS ON THE ORGANISM OF WORKERS INVOLVED IN INSTALLATION OF INSULATION

2021 ◽  
Vol 1 (161) ◽  
pp. 320-327
Author(s):  
O. Skrypnyk ◽  
V. Abrakitov ◽  
M. Ivashchenko
Keyword(s):  
Chemical Composition ◽  
Construction Industry ◽  
Mineral Wool ◽  
The Body ◽  
Mineral Waters ◽  
Dust Particles ◽  
Insulation Material ◽  
Production Environment ◽  
Insulation Materials ◽  
Production Factors

The use of modern thermal insulation materials in construction is one of the additional sources of harmful production factors and also lead to the formation of fine dust. To date, the risk of loss of health of workers in the construction industry in contact with mineral wool is little studied. To reduce the risk of health of workers in the construction industry, it is necessary to give a comprehensive assessment of harmful factors of the production environment when using mineral wool in the technological process and justify measures to improve working conditions. The paper provides information on a widely used in the construction industry insulation material - mineral wool. Its chemical composition is given. The main unfavorable factors of the working environment are revealed. In the construction industry, one of the most pronounced harmful production factors is the formation and release of dust, which is an aerosol of predominantly fibrogenic action. The development of the construction industry, the introduction of new insulation materials in the construction of industrial buildings, installations and structures, as well as residential and public buildings lead to new, insufficiently studied factors of the production environment that affect the health of workers and may increase the risk of health loss. To date, information on the effects of mineral wool on the body of workers and the toxicological characteristics of different types of mineral wool are fragmentary. The chemical composition of the dust determines the nature and severity of the adverse effects of dust. The dispersion composition of the dust determines the depth of penetration of particles into the respiratory organs of workers. The stability of dust particles in the air of the working area, their concentration, shape and duration of exposure determine the dust load and the risk to the health of workers. Dust particles can sorb on their surface other pollutants, which both in the complex and in isolation pollute the air of the working area and have an adverse effect on workers. An important criterion for the safety of mineral wool under inhalation is the dispersion of the dust formed. It is generally accepted that the most dangerous mineral wool dust with a dispersion of 3 microns or less.

scholarly journals Study on Energy-saving Insulation Materials in the Building’s Exterior

2015 ◽  
Vol 4 (1) ◽  
pp. 4
Author(s):  
Yang Zhang ◽  
Yazhi Hu
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Construction Industry ◽  
New Technologies ◽  
High Energy ◽  
Insulation Material ◽  
Curtain Wall ◽  
Construction Engineering ◽  
Technology Application ◽  
Insulation Materials

<p>Construction industry has been one of China's energy guzzlers, if we can reduce the energy consumption of the building industry through the use of new materials or new technologies, which will have a significant impact on the development of economy and society. The status quo of China's construction industry, high energy consumption, paper use energy-saving technologies in the field of construction works to expand the analysis, discusses the necessity of the construction industry currently uses energy-saving insulation materials and analyzes the current energy field of construction engineering technology application status, on the basis of focus on the application of energy-saving insulation materials in construction, particularly in the new system and the new glass curtain wall insulation material in construction applications, which further enhance the energy-saving technology within the field of construction engineering the application level has a certain reference.</p>

scholarly journals PRODUCTION OF THERMAL INSULATION MATERIAL BASED ON VOLCANIC ASH DEPOSITS OF PRIMAGADANYA

2019 ◽  
Vol 10 (2) ◽  
pp. 78-91
Author(s):  
A. V Bolotin ◽  
S. M Sergeev ◽  
A. A Lunegova ◽  
E. A Kochetkova
Keyword(s):  
Thermal Insulation ◽  
Building Materials ◽  
Volcanic Ash ◽  
Mineral Wool ◽  
Raw Material ◽  
Thermal Calculation ◽  
Vapor Permeability ◽  
Insulation Material ◽  
Comparative Performance ◽  
Insulation Materials

Modern technologies are not standing still, and scientists are trying not only to invent new building materials, but also to find non-standard use of various raw materials that were previously considered unsuitable for use. Innovative technologies are actively used for modern construction of buildings, in particular, some types of new materials are used in the construction of various facilities. This is especially true in areas where it is not possible to import or use ordinary building materials for various reasons. Often, when designing a building, developers are wondering whether it is worth making the house warm during construction, and which insulation for the walls of the house is better to choose. This article addresses the question of which insulation for walls is most suitable for construction. The most common are mineral insulation, which are represented on the market today in the form of basalt slabs, fiberglass, etc. They have such advantages as low thermal conductivity, good thermal insulation and vapor permeability. The article presents a table with comparative performance characteristics of a mineral wool stone slab and a fiberglass slab. Stone or basalt wool has several advantages. It is able to withstand significant temperatures and temperature changes, the mats are easy to transport, convenient to install. In our opinion, a serious alternative to basalt in the production of thermal insulation materials is volcanic ash. One of the main features of volcanic ash are its building qualities, such as good thermal insulation and an environmentally friendly composition. Since here we are considering the possibility of producing insulation materials based on volcanic ash, we performed a thermal calculation of the enclosing structures. Also in the tables are the costs of transportation of volcanic ash from the field to the point of the proposed production of insulating material. Volcanic ash can be widely used in countries with high volcanic activity as an inexpensive raw material for the manufacture of building materials. It does not require additional processing and has a number of useful properties.

The Choice of Chemical Composition and Raw Materials for the Production of Basalt Wool with the Defined Characteristics

2018 ◽  
Vol 284 ◽  
pp. 1018-1023
Author(s):  
A.V. Khandoshka ◽  
Svetlana G. Vlasova
Keyword(s):  
Surface Tension ◽  
Chemical Composition ◽  
Chemical Analysis ◽  
Thermal Insulation ◽  
Raw Materials ◽  
Mineral Wool ◽  
Chemical Compositions ◽  
Insulation Material ◽  
X Ray

The composition of mineral wool was selected for the research, based on the chemical composition of the raw materials, the determination of the acidity module to obtain the thermal insulation material with the best characteristics and the lowest cost of the production of basalt mineral wool. The paper deals with compositions of raw materials and selection chemical compositions of charges for production of basalt mineral wool, and the experiments of welded samples were made and tested for viscosity, surface tension, chemical analysis and x-ray analysis.

Health risk assessment for exposure to fine dust in production conditions

2019 ◽  
pp. 458-462
Author(s):  
O. I. Kopytenkova ◽  
A. V. Levanchuk ◽  
Z. Sh. Tursunov
Keyword(s):  
Health Risk ◽  
Construction Industry ◽  
Thermal Insulation ◽  
Working Environment ◽  
Dust Particles ◽  
Construction Site ◽  
Fine Dust ◽  
Production Environment ◽  
Working Zone

Introduction.The results of the study of the working area air during thermal insulation works are presented.The aim of the studywas to assess the health risk of workers in the construction industry and exposed to fine dust.Materials and methods.The number of dust particles of different dispersion in the air of the working area in the implementation of thermal insulation works is determined.Results.It is established that the working conditions during the thermal insulation works in accordance with the current regulatory documentation are classified as harmful 3 class 2 degree. Harmful factor of the production environment is dust (including PM10and fine PM2,5) in air of working zone (3.2). The air quality of the working area indicates a long stay of fine dust in the air over the territory of the construction site. Dust of different dispersed composition was found in the air of the working area during thermal insulation works. Th e dust concentration is more than 10 μm was 8.2±1.3 mg/m3, PM10and 1.8±0.4 mg/m3, PM2,5–1,25±0,2 mg/m3.Conclusions.The results obtained in the experiment make it possible to determine the safe duration of the working experience underthe influence of a harmful factor of the working environment (in terms of the permissible health risk) with different duration ofcontact with it during the day.

scholarly journals A Study on Insulation Characteristics of Glass Wool and Mineral Wool Coated with a Polysiloxane Agent

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Chan-Ki Jeon ◽  
Jae-Seong Lee ◽  
Hoon Chung ◽  
Ju-Ho Kim ◽  
Jong-Pil Park
Keyword(s):  
Thermal Conductivity ◽  
Mineral Wool ◽  
Glass Wool ◽  
The Other ◽  
Moisture Resistance ◽  
Insulation Material ◽  
Insulation Materials ◽  
Other Hand

The insulation in buildings is very important. Insulation used in the building is largely divided into organic and inorganic insulation by its insulation material. Organic insulation materials which are made of Styrofoam or polyurethane are extremely vulnerable to fire. On the other hand, inorganic insulation such as mineral wool and glass wool is very weak with moisture, while it is nonflammable, so that its usage is very limited. Therefore, this study developed moisture resistance applicable to mineral wool and glass wool and measured the thermal conductivity of the samples which are exposed to moisture by exposing the product coated with moisture resistance and without moisture resistance to moisture and evaluated how the moisture affects thermal conductivity by applying this to inorganic insulation.

scholarly journals Moisture behavior of external insulated precast concrete wall panels

2020 ◽  
pp. 174425912092585
Author(s):  
Pauli Sekki ◽  
Timo Karvinen ◽  
Juha Vinha
Keyword(s):  
Relative Humidity ◽  
Precast Concrete ◽  
Concrete Surface ◽  
Mineral Wool ◽  
Insulation Material ◽  
Concrete Wall ◽  
Building Stock ◽  
Interior Surface ◽  
Insulation Materials ◽  
Wall Panels

Excess moisture in concrete structures is a major problem in building industry. It is claimed that degradation of the finishing materials of concrete slabs is the largest source of volatile organic compound in the building stock in the Nordic countries. Considering concrete wall panels, the choice of the insulation material influences concrete drying considerably and causes a risk for moisture accumulation on the interior surface, if vapor tight finishing materials are used or if finishing materials are installed prematurely. Mineral wool insulation, which has predominately been used in Finland, is a vapor open material. However, vapor tight plastic foam insulation materials are nowadays more commonplace. Here we show that the overall rate of drying of the concrete panel with a vapor open insulation material is higher in comparison to the concrete panel with vapor tight insulation materials. However, relative humidity distribution near the inner surface of the concrete panel at the end of the drying phase is almost identical irrespective of the insulation material and the water vapor resistance of the interior surface material has a greater impact on the relative humidity level on the inner concrete surface. Moisture behavior of concrete panel walls is studied under a certain building schedule in Finnish environment and building conditions by numerical simulation. The model for drying of concrete is calibrated based on laboratory measurements. According to our study, self-desiccation and changing diffusivity due to the hydration process of the concrete cannot be ignored when evaluating the moisture behavior of the concrete wall panel structure with a low water binder ratio ( w/ b < 0.5). Measurements indicate that the early age humidity drop is by up to 10 percentage points.

scholarly journals INVESTIGATION OF THE FORMATION PROCESS OF HAZARDOUS AND HARMFUL PRODUCTION FACTORS WHEN CUTTING A STONE FOR CONSTRUCTION WORKS

2017 ◽  
Vol 5 ◽  
pp. 30-38 ◽  
Author(s):  
Alla Bezpalova ◽  
Vladimir Lebedev
Keyword(s):  
Grain Size ◽  
Chemical Composition ◽  
Human Body ◽  
Cutting Speed ◽  
Production Factor ◽  
Dust Exposure ◽  
Dust Particles ◽  
Dust Formation ◽  
Production Factors ◽  
Stone Cutting

Stone cutting for construction work is carried out by disk diamond wheels the rotation speed of which, and, consequently, the cutting speed is 35-50 m/s. In view of the high intensity of the cutting process and intensive microchip formation, the process of stone cutting is accompanied by considerable dust formation, which can be both harmful and dangerous in the work. The greatest danger is represented by dust particles, which dimensions are 5 μm or less. These particles have the greatest pathogenic effect on the respiratory system of the human body. In addition, the settling time of these particles is measured in hours. Thus, even after the termination of work, the risk of dust exposure to the human body remains. Insignificant time of inhalation of these particles can lead a person to disability and death. Insurance payments in case of disability and compensation in case of death of an employee for these reasons all over the world amount to multibillion sums, which, even for this reason, makes the issue of combating this phenomenon very urgent. In this paper, the process of generation of hazardous and harmful production factors arising as a result of dust formation during the stone cutting, the regularity of dust distribution by fractions, quantitative indicators of the process for improving equipment, as well as individual and collective means of personnel protection are determined. The shape and dimensions of the cutting grains of the cutting discs are studied in the paper, depending on the grain material and the grain size of the cutting disc. Thecurvature radii of the cutting grains depend on the grain material and the grain size of the cutting disc. The actual number of grains participating in cutting and, consequently, in dust formation is shown. The dimensions of the dust particles depend on the graininess of the cutting discs and the processing regimes. Using the law of normal particle size distribution, the percentage of dust particles is determined depending on processing conditions. The rate of particle settling depends on their size and mass. The formation of a dust-air mixture and its probable concentration and chemical composition of dust depend on the chemical composition of the cutting materials. Regularities are obtained, which can give an opportunity to improve the individual and collective protection of workers from this harmful production factor.

scholarly journals THE HYGIENIC ASSESSMENT OF THE WORKING ENVIRONMENT IN INDIVIDUAL OCCUPATIONS IN BUILDING ORGANIZATIONS

2018 ◽  
Vol 97 (12) ◽  
pp. 1203-1209 ◽  
Author(s):  
Olga I. Kopytenkova ◽  
Z. Sh. Tursunov ◽  
A. V. Levanchuk ◽  
O. V. Mironenko ◽  
N. M. Frolova ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Health Risk ◽  
Work Experience ◽  
Building Materials ◽  
New Technologies ◽  
Mineral Wool ◽  
Working Environment ◽  
Dust Particles ◽  
Health Work

Introduction. The development of the construction industry is accompanied by the use of new technologies and building materials. Materials based on mineral wool (MW) became to be widely used. The article presents the results of the study of working environment factors and the determination of the safe for health work experience based on the health risk calculation for workers in contact with MW. Material and methods. To quantify the air pollution of the working area at the construction site, samples were taken using an aspirator and a dust meter. An absorption method using a spectrophotometer was used to determine the chemical composition of the dust. Statistical analysis and mathematical modeling were carried out using a standard software package Microsoft Excel, STADIA. Results. A table for the rapid health risk assessment of workers in contact with MW was developed. The risk of health loss is determined as “High” (R = 11.3). Discussion. Working conditions under the performance of heat-insulating works at facades cladding with the use of MW are classified as harmful (class 3.2) on the dust content in working zone air. In the course of the study, coarse dust and fine dust were found in the air. The data on the change of the dust concentration depending on air humidity, the concentration of dust particles of different dispersion at different distances from the place of work is presented. The chemical composition of dust is presented, the presence of heavy metals is established. Dependences for the determination of safe for health work experience under the influence of the various concentration of dust and the duration of contact are constructed. Сonclusions. On the basis of the research to improve the legal support in the field of occupational health and safety, a number of activities for workers engaged in work with the use of MW are proposed.

scholarly journals Study on Energy-saving Insulation Materials in the Building’s Exterior

2015 ◽  
Vol 4 (1) ◽  
pp. 4
Author(s):  
Yang Zhang ◽  
Yazhi Hu
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Construction Industry ◽  
New Technologies ◽  
High Energy ◽  
Insulation Material ◽  
Curtain Wall ◽  
Construction Engineering ◽  
Technology Application ◽  
Insulation Materials

<p>Construction industry has been one of China's energy guzzlers, if we can reduce the energy consumption of the building industry through the use of new materials or new technologies, which will have a significant impact on the development of economy and society. The status quo of China's construction industry, high energy consumption, paper use energy-saving technologies in the field of construction works to expand the analysis, discusses the necessity of the construction industry currently uses energy-saving insulation materials and analyzes the current energy field of construction engineering technology application status, on the basis of focus on the application of energy-saving insulation materials in construction, particularly in the new system and the new glass curtain wall insulation material in construction applications, which further enhance the energy-saving technology within the field of construction engineering the application level has a certain reference.</p>

STRUCTURAL AND TECHNOLOGICAL INVESTIGATIONS OF BUILDING ENVELOPE

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Ruta Miniotaite
Keyword(s):  
Polyurethane Foam ◽  
Mineral Wool ◽  
Building Envelope ◽  
Insulation Material ◽  
Optimal Thickness ◽  
Insulation Materials ◽  
Energy Efficient Buildings ◽  
Alternative Materials ◽  
Key Factor ◽  
Simple Additive Weighting

The article examines technological and structural solutions for walls, roofs, floors in order to find the most effective barriers for each material and its thickness. Thermal insulation materials are the key factor to be considered in energy efficient buildings. Selected alternative materials are mineral wool, polystyrene and polyurethane foam. Thermal parameters, economic and technological indicators are compared within the envelope. The optimal thickness of the envelope component is found by calculating every envelope option by means of test utility method. The most efficient insulation material is determined by the simple additive weighting (SAW) method. The optimal thickness of insulation materials: 400 mm for the roof, 300 mm for walls and 300 mm for floors. The most effective materials are as follows: polyurethane foam for the roof, polyurethane foam for walls and polystyrene for floors.

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