scholarly journals Stability Relevant Properties of an SiO2 Aerogel-Based Rendering and Its Application on Buildings

2021 ◽  
Vol 13 (18) ◽  
pp. 10035
Author(s):  
Thomas Stahl ◽  
Karim Ghazi Wakili ◽  
Ernst Heiduk
Keyword(s):  
Construction Materials ◽  
Main Ingredient ◽  
External Appearance ◽  
Historic Building ◽  
Building Product ◽  
Industrial Enterprises ◽  
Research Level ◽  
Sio2 Aerogel ◽  
Different Temperatures ◽  
Thermal Influence

Aerogel-based renderings and plasters have been spreading throughout Europe for nearly a decade. Several national and EU-funded projects have addressed this interesting building product, both at research level within academia and at application level within R&D of renowned industrial enterprises. At present, a number of investigations into the hygro-thermal, chemical and application properties of a commercially successful aerogel-based rendering and its main ingredient, SiO2 aerogel granules, have been undertaken. Immersion in water showed that even under harsh circumstances water does not enter the aerogel granules, but rather accumulates in the porous phase surrounding the granules. A further immersion in calcium hydroxide at different temperatures did not affect the aerogel granule either, which indicates the robustness of the granules with respect to their exposure to moisture and chemical deterioration emerging from the construction materials the rendering is applied on. An executed application to a historic building with a structured finish, and without any reinforcement mesh, showed the advantage of a versatile applicability of this rendering when the external appearance and visible details of a façade must be kept unchanged. The investigation is rounded off by an infrared picture taken on a cold day showing the thermal influence of the aerogel-based rendering, and its effectiveness for reducing heat loss in buildings.

scholarly journals Management of innovation processes at the enterprises of the construction materials industry

2018 ◽  
Vol 170 ◽  
pp. 01099
Author(s):  
Nikolay Voytolovskiy ◽  
Ekaterina Maslyukova ◽  
Margarita Aleksandrova ◽  
Varvara Dikareva ◽  
Alexander Fadeev
Keyword(s):  
Life Cycle ◽  
Economic Activity ◽  
Construction Materials ◽  
Management Model ◽  
Innovative Development ◽  
Management Mechanism ◽  
Industrial Enterprises ◽  
Management Of Innovation ◽  
Methodical Approach ◽  
Innovation Processes

The purpose of this paper is the development of a methodical approach to management of the parameters of the life cycle of innovations. This approach ensures the increase of the efficiency of economic activity by intensifying the processes of innovative development of industrial enterprises. As a result of the research, the features of the processes for implementing the life cycle of innovations were determined; the system of criteria for assessing the efficiency of management of the parameters of the life cycle of innovations was developed; a management model for the parameters of the life cycle of innovations was formed; and a management mechanism for the life cycle of innovations in a saturated market was developed.

The Analysis Of E-Commerce Logistics Efficiency Of The Ukrainian Construction Enterprises

2021 ◽  
Vol 38 (4) ◽  
Author(s):  
Marina Kravchenko ◽  
Hanna Manoryk ◽  
Natalia Sytnik
Keyword(s):  
Electronic Commerce ◽  
Economic Activity ◽  
Construction Materials ◽  
Net Income ◽  
Sales Channel ◽  
Direct Sales ◽  
Construction Enterprises ◽  
Manufacturing Enterprises ◽  
Industrial Enterprises ◽  
Final Consumer

An important component of successful economic activity of industrial enterprises is the optimal sales model combined with e-commerce opportunities. The article analyzed two construction materials manufacturing enterprises categories: those using exclusively a sales network for the promotion of their products, and those developing a direct sales system to the final consumer via electronic commerce. These are basically two different logistical approaches to the process of selling their own products. The efficiency of using e-commerce logistics means is determined by the correlation of sales expenses index with an indicator of enterprises' net income. It was proved sales expenses' indicator affects the dynamics of the net income indicator positively only for the enterprises using e-commerce logistics as a means of setting up a direct sales channel for their products. The article provides recommendations for creating an optimal logistics e-commerce system for construction materials manufacturing enterprises.

Thermal influence on the embryonic development and hatching rate of the flameback pygmy angelfish Centropyge aurantonotus eggs

Zygote ◽  
2019 ◽  
Vol 28 (1) ◽  
pp. 80-82
Author(s):  
Raoani Cruz Mendonça ◽  
Sarah Pittigliani Ikebata ◽  
Sérgio Leandro Araújo-Silva ◽  
João Vitor Azevedo Manhães ◽  
Mônica Yumi Tsuzuki
Keyword(s):  
Embryonic Development ◽  
Incubation Temperature ◽  
Abiotic Factors ◽  
Environmental Parameters ◽  
Hatching Rate ◽  
Influence Of Temperature ◽  
Different Temperatures ◽  
Influence Of Temperature On ◽  
Thermal Influence ◽  
Hatching Rates

SummaryThe flameback pygmy angelfish Centropyge aurantonotus, highly appreciated and valued by the aquarium market, is heavily harvested and traded. Temperature is one of the abiotic factors that has the most influence on fish development, especially in the early stages of life. For captive production, it is essential to know the appropriate environmental parameters for each species. In this sense, this study aimed to evaluate the influence of temperature on the embryonic development and hatching rates of C. aurantonotus incubated at six different temperatures (20, 22, 24, 26, 28, 30°C). Embryonic development events were very similar in terms of morphological and chronological characteristics compared with other species of the genus Centropyge. Incubation time was inversely proportional to temperature. The treatment at 22°C required twice the time of that required by 30°C treatment for hatching to occur. The best incubation temperature range was 24–28°C. Values below 22°C and at 30°C showed lower hatching rates compared with other treatments. Based on these results, the recommended temperature at which to incubate C. aurantonotus eggs is between 24–28°C.

scholarly journals ORGANIZATIONAL AND ECONOMIC APPROACHES TO FINANCIAL DEVELOPMENT OF CONSTRUCTION ENTERPRISES

2020 ◽  
Vol 1 (18(46)) ◽  
pp. 62-67
Author(s):  
Oleksandr Lanyo
Keyword(s):  
Financial Development ◽  
Raw Materials ◽  
Construction Materials ◽  
Product Line ◽  
Production Costs ◽  
Construction Enterprises ◽  
Construction Companies ◽  
Foreign Companies ◽  
Industrial Enterprises ◽  
Knowledge Intensive

Introduction. On the one hand, the financial development of industrial enterprises is conditioned by a number of traditional measures, which include: reduction of production costs; improving the quality of products; expanding the product line and increasing the level of service in order to maximize compliance with consumer demand. However, on the other hand, due to the specifics of the construction sector, the issue of financial development of such enterprises requires a comprehensive approach, not limited to the field of internal management, but also to consider this issue from the standpoint of institutional and organizational and economic impact. The purpose. The purpose of the article is to highlight the quantitative features of the financial development of enterprises in the construction industry and a description of promising organizational and economic measures of influence. Results. The article substantiates the features of the study of activities in the field of construction according to the project approach. The peculiarities of the institutional structure of the investment and construction complex of the economy are specified. Based on the theory of stakeholders, a comprehensive system of criteria for financial development of construction companies in terms of stakeholder groups has been formed. Conclusions. The organizational measures to ensure stable financial development of domestic construction companies have been identified. These include: implementation of integration processes with suppliers of raw materials; use of innovative knowledge-intensive technologies of construction and production of construction materials; creation of joint ventures with foreign companies. For each of the organizational measures, a list of probable risks and threats is identified, as well as the tools for their management are substantiated.

scholarly journals Mechanical properties changes in fir wood (abies sp.), linden wood (tilia sp.), and beech wood (fagus sp.) subjected to various thermal modification process conditions

2021 ◽  
Vol 1208 (1) ◽  
pp. 012025
Author(s):  
Redžo Hasanagić ◽  
Sauradipta Ganguly ◽  
Ermin Bajramović ◽  
Adem Hasanagić
Keyword(s):  
Mechanical Properties ◽  
Beech Wood ◽  
Construction Materials ◽  
Treated Wood ◽  
Thermal Modification ◽  
Process Conditions ◽  
Modification Process ◽  
Maximum Duration ◽  
Different Temperatures ◽  
Control Samples

Abstract Wood is one of the most important construction materials in Europe and its use in building applications has increased in the recent decades. To enable even more extensive and reliable use of wood, this article aimed to determine the effect of thermal modification on mechanical properties of fir wood (lat. Abies sp.), linden wood (lat. Tilia sp.), and beech wood (lat. Fagus sp.). The thermal modification was conducted in a laboratory oven at five different temperatures of 170, 180, 195, 210, 220 °C and processed with a different maximum duration of the process of 78, 120, 180, 240, 276 minutes. Mechanical properties of treated wood have shown statistically insignificant fluctuations at lower temperatures compared to control samples. On the other hand, raising the temperature to 210 °C significantly affected the strength of all the species. The results revealed that thermal modification at high temperatures and longer exposure causes a decrease in the maximum force of the three wood species.

scholarly journals Fort McCoy, Wisconsin Building 550 maintenance plan

2020 ◽  
Author(s):  
August S. Fuelberth ◽  
◽  
Adam D. Smith ◽  
Sunny E. Adams
Keyword(s):  
World War Ii ◽  
Construction Materials ◽  
Cultural Resources ◽  
World War ◽  
Historic Building ◽  
Cultural Resources Management ◽  
Fire Station ◽  
Element Failure ◽  
National Historic Preservation Act ◽  
Maintenance Plan

Building 550 (former World War II fire station) is located on Fort McCoy, Wisconsin, and was recommended eligible for the National Register of Historic Places (NRHP) in 2018 (Smith and Adams 2018). The building is currently vacant. It is an intact example of an 800 Series World War II fire station with character-defining features of its period of significance from 1939 to 1946 on its exterior and interior. All buildings, especially historic ones, require regular planned maintenance and repair. The most notable cause of historic building element failure and/or decay is not the fact that the historic building is old, but rather it is caused by incorrect or inappropriate repair and/or basic neglect of the historic building fabric. This document is a maintenance manual compiled with as-is conditions of construction materials of Building 550. The Secretary of Interior Guidelines on rehabilitation and repair per material are discussed to provide the cultural resources manager at Fort McCoy a guide to maintain this historic building. This report satisfies Section 110 of the National Historic Preservation Act (NHPA) of 1966 as amended and will help the Fort McCoy Cultural Resources Management office to manage this historic building.

Strength Performance of Sustainable Mortar Containing Recycle Sewage Sludge Ash (SSA)

2018 ◽  
Vol 15 (1) ◽  
pp. 47
Author(s):  
NURUL NAZIERAH MOHD YUSRI ◽  
KARTINI KAMARUDDIN ◽  
HAMIDAH MOHD SAMAN ◽  
NURAINI TUTUR
Keyword(s):  
Compressive Strength ◽  
Sewage Sludge ◽  
Construction Material ◽  
Construction Materials ◽  
Wastewater Treatment Process ◽  
Sewage Sludge Ash ◽  
Strength Performance ◽  
Different Temperatures ◽  
Sludge Ash ◽  
Almost All

Sewage sludge is a by-product generated within the wastewater treatment process. Severe concern arised as the sludge are massively been dumped to the landfill and it may affect the environment. Many studies had been conducted in reusing the sewage sludge as construction material, where it is one of the optional ways to solve the issue. In this study, dried sewage sludge was incinerated with two different temperatures in order to produce sewage sludge ash (SSA), which are 800°C and 1000°C. After few processes, this SSA then reused in mortar as cement replacement with the replacement percentage of 5%, 10%, 15% and 20% by weight. The strength performance of mortar specimens was investigated after 7, 28, 60 and 90 days of curing. From the results, it is clearly showed that the compressive strength of all mortar specimens increased when the period of curing was prolonged. Moreover, almost all compressive strength of SSA mortars was higher than the control mortar. Therefore, there is potential to reuse this waste material as part of construction materials and hence, its plays an important role for future researches in minimisation of waste.

Changes of Mechanical Properties of Lightweight Cement Mortar Mixed with Recycled Expanded Polystyrene and Subjected to High Temperatures

2014 ◽  
Vol 1051 ◽  
pp. 752-756 ◽  
Author(s):  
Rocío Sancho ◽  
Ángel Castillo ◽  
Ma Eugenia Maciá ◽  
Rosa Corral
Keyword(s):  
Mechanical Properties ◽  
High Temperatures ◽  
Mechanical Response ◽  
Cement Mortar ◽  
Construction Materials ◽  
Lightweight Aggregate ◽  
Expanded Polystyrene ◽  
Partial Replacement ◽  
Different Temperatures ◽  
Residual Product

The main aim of this paper is to evaluate the influence of the recycled expanded polystyrene as lightweight aggregate on the mechanical properties of lightweight cement mortar when subjected to high temperatures.Various tests have been carried out on different mixtures of mortar. The water/cement mix proportion has always been the same and only the nature of the aggregates has changed, with a partial replacement of the conventional aggregate by recycled ground EPS (EPS-G) with values ranging from 10% to 30%, achieving significant results in relation to exposure to high temperatures. In this research, the samples have been subjected to different temperatures of exposure, in order to analyze the influence of the lightweight recycled arid dosage in the mechanical properties of mortars.The results of this study show the ability of mechanical response at high temperatures with light mortars EPS-G. This study shows how this new mix can be used in different building types, optimizing construction materials and reducing mortars density while transforming a residual product into an active product.

Strength Performance of Sustainable Mortar Containing Recycle Sewage Sludge Ash (SSA)

2020 ◽  
Vol 15 (1) ◽  
pp. 47
Author(s):  
Nurul Nazierah Mohd Yusri ◽  
Kartini Kamaruddin ◽  
Hamidah Mohd Saman ◽  
Nuraini Tutur
Keyword(s):  
Compressive Strength ◽  
Sewage Sludge ◽  
Construction Material ◽  
Construction Materials ◽  
Wastewater Treatment Process ◽  
Sewage Sludge Ash ◽  
Strength Performance ◽  
Different Temperatures ◽  
Sludge Ash ◽  
Almost All

Sewage sludge is a by-product generated within the wastewater treatment process. Severe concern arised as the sludge are massively been dumped to the landfill and it may affect the environment. Many studies had been conducted in reusing the sewage sludge as construction material, where it is one of the optional ways to solve the issue. In this study, dried sewage sludge was incinerated with two different temperatures in order to produce sewage sludge ash (SSA), which are 800°C and 1000°C. After few processes, this SSA then reused in mortar as cement replacement with the replacement percentage of 5%, 10%, 15% and 20% by weight. The strength performance of mortar specimens was investigated after 7, 28, 60 and 90 days of curing. From the results, it is clearly showed that the compressive strength of all mortar specimens increased when the period of curing was prolonged. Moreover, almost all compressive strength of SSA mortars was higher than the control mortar. Therefore, there is potential to reuse this waste material as part of construction materials and hence, its plays an important role for future researches in minimisation of waste. 

Sign in / Sign up

Export Citation Format

Share Document