scholarly journals The correction of foam glass composition based on its principal parameters

2021 ◽  
Vol 350 ◽  
pp. 00009
Author(s):  
Dmitry Safonchik ◽  
Svetlana Maksimovich
Keyword(s):  
Mechanical Characteristics ◽  
Glass Composition ◽  
Foam Glass ◽  
Cost Price ◽  
Foaming Agent ◽  
Insulating Material ◽  
Leading Position ◽  
The Cost ◽  
Foaming Temperature ◽  
Better Than

Thermal insulation materials are the main link in solving the problem of enclosing constructions energy efficiency. The number of heat insulators is relatively low, that`s why it is important to develop new insulators that would be better than the existing ones in their characteristics. Such heat-insulating material as foam glass is known, but it is practically not applied, despite the fact that it possesses high heatinsulating and mechanical characteristics, it is non-combustible, durable and environmentally friendly. All the advantages of foam glass are inferior to one drawback. It is the high cost price of this material. If the cost price of foam glass was reduced and its main characteristics were at the same level, foam glass would take a leading position among other heatinsulating materials. The article presents some information about the development of foam glass, in which dolomite flour is used as a foaming agent. The material proposed by the authors has a density of about 200 kg / m3, water absorption of 25%. The material is manufactured at maximum foaming temperature of 750 °C.

Preparation of Foam Glass Ceramics from Phosphorus Slag

2010 ◽  
Vol 105-106 ◽  
pp. 600-603 ◽  
Author(s):  
Ben Xu ◽  
Kai Ming Liang ◽  
J.W. Cao ◽  
Y.H. Li
Keyword(s):  
Glass Powder ◽  
Foam Glass ◽  
Glass Ceramics ◽  
Processing Parameters ◽  
Treatment Temperature ◽  
Homogeneous Distribution ◽  
Sintering Process ◽  
Foaming Agent ◽  
Foaming Temperature ◽  
Foam Glass Ceramics

Phosphorus slag could be used to prepare wollastonite glass ceramics. With the aid of incorporated foaming agent, foam glass ceramics can be obtained via the sintering of the slag-based glass. After the glass powder reacted with graphite, macro-size pores with homogeneous distribution were formed. The level of porosity of the fabricated foams was controlled by varying heat treatment temperature and amount of foaming agent. It was found that the preferential processing parameters for producing foam glass ceramics were foaming temperature of 1000°C with holding time of 10 min and 1 wt. % of graphite. In this case, the porosity reached about 80%. The results show that dominant crystalline phase is wollastonite, and the high compression strength results from the crystallization of glass during sintering process.

Study on Fabrication, Defects and Compression Properties of Al Foams at Different Foaming Temperatures

2011 ◽  
Vol 214 ◽  
pp. 70-74 ◽  
Author(s):  
Wei Min Zhao ◽  
Hui Zhang ◽  
Hai Peng Li ◽  
Zhi Feng Wang ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Pore Structure ◽  
Aluminum Foams ◽  
Foaming Agent ◽  
Compression Properties ◽  
Al Powder ◽  
Fabrication Defects ◽  
Lower Temperature ◽  
Foaming Temperature ◽  
Better Than ◽  
Al Foams

Using Al powder as thickening agent and CaCO3 powder as foaming agent, Al foams with above 85% porosity, pore sizes between 1mm and 4mm and relatively uniform pore structure have been fabricated by melt foaming method at different foaming temperatures. Meanwhile, the paper researched the effect of foaming temperature on foaming effect and analyzed the defects in Al foams. At last, compression test were taken in order to investigate the mechanical properties of aluminum foams. The results showed that pore structure, pore distribution and compression properties of Al foams fabricated at 720°C were much better than that fabricated at lower temperature.

COMPARATIVE ANALYSIS OF THE OWN EXPERIMENTAL TECHNIQUES OF PRODUCING THE FOAMED GLASS-CERAMIC

2016 ◽  
Vol 22 (2) ◽  
pp. 55-64
Author(s):  
LUCIAN PĂUNESCU ◽  
MARIUS FLORIN DRĂGOESCU ◽  
SORIN MIRCEA AXINTE
Keyword(s):  
Glass Ceramic ◽  
Mechanical Characteristics ◽  
Fossil Fuel ◽  
Coal Ash ◽  
Microwave Energy ◽  
High Porosity ◽  
Foaming Agent ◽  
Insulating Material ◽  
Foamed Glass ◽  
Physical And Mechanical Characteristics

The paper presents experimental results obtained by a team of researchers from the company Daily Sourcing & Research SRL Bucharest in the field of producing the foamed glass-ceramic from waste bottle glass, coal ash and silicon carbide as foaming agent. The originality of the experiments consists in the use of electricity or microwave energy, unlike all techniques known worldwide consumers of fossil fuel. The product, obtained with low energy consumptions and very low pollutants emissions, has physical and mechanical characteristics of an insulating material, i.e. high porosity, low thermal conductivity and an adequate compressive strength.

ABOUT THE NEED OF CREATING AN EFFECTIVE HEAT INSULATION MATERIAL FOR HOUSING BASED ON FOAM GLASS COMPOSITION

2016 ◽  
Vol 6 (2) ◽  
pp. 10-13 ◽  
Author(s):  
Sergey A. MIZYURYAEV ◽  
Anna Yu. ZHIGULINA ◽  
Kseniya V. GANECHKINA
Keyword(s):  
Industrial Waste ◽  
Heat Insulation ◽  
Glass Composition ◽  
Foam Glass ◽  
Mineral Wool ◽  
Housing Construction ◽  
Insulation Material ◽  
Advantages And Disadvantages ◽  
Heat Insulation Material ◽  
The Cost

The article deals with the problems of eff ective insulation for housing construction. The most commonly used heaters in our country are polystyrene and mineral wool. The advantages and disadvantages of these heaters, and proposed the idea of creating an alternative insulation based on foam glass composition are studied. This material is stripped major drawbacks polystyrene and mineral wool. It is durable, durable, non-fl ammable, water-resistant, environmentally friendly, and has a number of other advantages. The disadvantage of the material can be considered its high cost. To reduce the cost of insulation it is supposed to consider the possibility of introducing into its composition various additives, including industrial waste, which will help solve up-to-date environmental problems.

scholarly journals COMPARATIVE ANALYSIS OF THE OWN EXPERIMENTAL TECHNIQUES OF PRODUCING THE FOAMED GLASS-CERAMIC

2017 ◽  
Vol 22 (2) ◽  
Author(s):  
LUCIAN PĂUNESCU ◽  
MARIUS FLORIN DRĂGOESCU ◽  
SORIN MIRCEA AXINTE
Keyword(s):  
Glass Ceramic ◽  
Mechanical Characteristics ◽  
Fossil Fuel ◽  
Coal Ash ◽  
Microwave Energy ◽  
High Porosity ◽  
Foaming Agent ◽  
Insulating Material ◽  
Foamed Glass ◽  
Physical And Mechanical Characteristics

The paper presents experimental results obtained by a team of researchers from the company Daily Sourcing & Research SRL Bucharest in the field of producing the foamed glass-ceramic from waste bottle glass, coal ash and silicon carbide as foaming agent. The originality of the experiments consists in the use of electricity or microwave energy, unlike all techniques known worldwide consumers of fossil fuel. The product, obtained with low energy consumptions and very low pollutants emissions, has physical and mechanical characteristics of an insulating material, i.e. high porosity, low thermal conductivity and an adequate compressive strength

Determination of the minimum number of technological bases of a part

2020 ◽  
pp. 73-75
Author(s):  
B.M. Bazrov ◽  
T.M. Gaynutdinov
Keyword(s):  
Cost Price ◽  
Labor Input ◽  
Part Surface ◽  
Technological Base ◽  
Size Accuracy ◽  
Minimum Number ◽  
The Cost ◽  
Input Cost ◽  
Selection Of

The selection of technological bases is considered before the choice of the type of billet and the development of the route of the technological process. A technique is proposed for selecting the minimum number of sets of technological bases according to the criterion of equality in the cost price of manufacturing the part according to the principle of unity and combination of bases at this stage. Keywords: part, surface, coordinating size, accuracy, design and technological base, labor input, cost price. [email protected]

scholarly journals Telecom Churn Prediction System Based on Ensemble Learning Using Feature Grouping

2021 ◽  
Vol 11 (11) ◽  
pp. 4742
Author(s):  
Tianpei Xu ◽  
Ying Ma ◽  
Kangchul Kim
Keyword(s):  
Ensemble Learning ◽  
Machine Learning Algorithms ◽  
Customer Relationship ◽  
Prediction System ◽  
Churn Prediction ◽  
Customer Churn ◽  
Feature Grouping ◽  
Recognition Systems ◽  
The Cost ◽  
Better Than

In recent years, the telecom market has been very competitive. The cost of retaining existing telecom customers is lower than attracting new customers. It is necessary for a telecom company to understand customer churn through customer relationship management (CRM). Therefore, CRM analyzers are required to predict which customers will churn. This study proposes a customer-churn prediction system that uses an ensemble-learning technique consisting of stacking models and soft voting. Xgboost, Logistic regression, Decision tree, and Naïve Bayes machine-learning algorithms are selected to build a stacking model with two levels, and the three outputs of the second level are used for soft voting. Feature construction of the churn dataset includes equidistant grouping of customer behavior features to expand the space of features and discover latent information from the churn dataset. The original and new churn datasets are analyzed in the stacking ensemble model with four evaluation metrics. The experimental results show that the proposed customer churn predictions have accuracies of 96.12% and 98.09% for the original and new churn datasets, respectively. These results are better than state-of-the-art churn recognition systems.

Effect of Na2CO3 as foaming agent on dynamics and structure of foam glass melts

2014 ◽  
Vol 400 ◽  
pp. 1-5 ◽  
Author(s):  
Rasmus R. Petersen ◽  
Jakob König ◽  
Morten M. Smedskjaer ◽  
Yuanzheng Yue
Keyword(s):  
Foam Glass ◽  
Glass Melts ◽  
Foaming Agent

The Race for Online Reputation: Implications for Platforms, Firms, and Consumers

2021 ◽  
Author(s):  
Mingwen Yang ◽  
Zhiqiang (Eric) Zheng ◽  
Vijay Mookerjee
Keyword(s):  
Adverse Event ◽  
Marketing Mix ◽  
Digital Economy ◽  
The Other ◽  
The Mean ◽  
The Absolute ◽  
The Cost ◽  
Online Reputation ◽  
Better Than

Online reputation has become a key marketing-mix variable in the digital economy. Our study helps managers decide on the effort they should use to manage online reputation. We consider an online reputation race in which it is important not just to manage the absolute reputation, but also the relative rating. That is, to stay ahead, a firm should try to have ratings that are better than those of its competitors. Our findings are particularly significant for platform owners (such as Expedia or Yelp) to strategically grow their base of participating firms: growing the middle of the market (firms with average ratings) is the best option considering the goals of the platform and the other stakeholders, namely incumbents and consumers. For firms, we find that they should increase their effort when the mean market rating increases. Another key insight for firms is that, sometimes, adversity can come disguised as an opportunity. When an adverse event strikes the industry (such as a reduction in sales margin or an increase in the cost of effort), a firm’s profit can increase if it can manage this event better than its competitors.

Study of the Water-Glass Role in the Foam Glass Synthesis Using Glycerol Foaming Agent

2021 ◽  
Vol 316 ◽  
pp. 153-158
Author(s):  
Boris M. Goltsman ◽  
Lyubov A. Yatsenko ◽  
Natalia S. Goltsman
Keyword(s):  
Porous Structure ◽  
Structure Formation ◽  
Water Glass ◽  
Glass Batch ◽  
Foam Glass ◽  
Foaming Agent ◽  
Additive Type ◽  
Highly Porous ◽  
Material Porosity

The article discusses the peculiarities of the "water-glass – glycerol" foaming mixture components interaction during foam glass synthesis. The important role of the foaming additive type in the foam glass porous structure formation was described, the main foaming substances were listed. The obtaining and researching technology of the samples was described, the compositions of the initial batches using the "water-glass – glycerol" mixture were developed. It was shown that a material with a highly porous structure and density below 500 kg/m3 can be obtained only with the combined introduction of water-glass and glycerol. In this case, mixtures with a predominance of water-glass in the foaming mixture possess optimal properties. Using DSC, it was shown that the addition of water-glass to the mixture completely eliminates the evaporation of glycerol at lower temperatures and intensifies its combustion at higher temperatures. Thus, the addition of water-glass to the glycerol-based foam glass batch allows glycerol to be saved up to higher temperatures that increases the resulting material porosity.

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