Intensive Ways of Producing Carbonate Curing Building Materials Based on Lime Secondary Raw Materials

The article is dedicated to the research and development of intensive methods for curing products by capturing and binding CO2. It aims to improve and increase the productivity of technologies for the production of artificially carbonated building materials and products. Soda production wastes, limestone dust and finely dispersed limestone dust were used as the research objects. Secondary raw materials have been investigated using modern methods of phase composition and granulometry test. Intensive methods of production of accelerated carbonation of systems consisting of soda wastes were tested using multi-parameter optimization methods. The effects of recycled lime materials on the strength and hydrophysical properties of the obtained material were determined. The secondary raw materials effect depended on the composition of the raw mixture, molding conditions, CO2 concentration applied to the carbonate curing chamber, and the duration of exposure to environments with high CO2 content. It was found that the most effective way of providing accelerated carbonation curing of construction materials and products is a combined carbonation method, combining the principles of dynamic and static methods. It was concluded that the optimal CO2 concentration in the gas-air mixtures used for carbonate curing is 30%–40%.

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INTENSIVE WAYS OF PRODUCING CARBONATE CURING BUILDING MATERIALS BASED ON LIME SECONDARY RAW MATERIALS

Construction and industrial safety ◽

10.37279/2413-1873-2020-18-43-46 ◽

2020 ◽

pp. 43-46

Author(s):

N. V. Lyubomirskiy ◽

S. I. Fedorkin ◽

А. S. Bakhtin ◽

Т. А. Bakhtina

Keyword(s):

Building Materials ◽

Raw Materials ◽

Construction Materials ◽

Co2 Concentration ◽

Optimization Methods ◽

Accelerated Carbonation ◽

Secondary Raw Materials ◽

Production Wastes ◽

Limestone Dust ◽

Carbonation Curing

the article is dedicated to the research and development of intensive methods for curing products by capturing and binding CO2. It aims to improve and increase the productivity of technologies for the production of artificially carbonated building materials and products. Soda production wastes, limestone dust and finely dispersed limestone dust were used as the research objects. Secondary raw materials have been investigated using modern methods of phase composition and granulometry test. Intensive methods of production of accelerated carbonation of systems consisting of soda wastes were tested using multi-parameter optimization methods. The effects of recycled lime materials on the strength and hydrophysical properties of the obtained material were determined. The secondary raw materials effect depended on the composition of the raw mixture, molding conditions, CO2 concentration applied to the carbonate curing chamber, and the duration of exposure to environments with high CO2 content. It was found that the most effective way of providing accelerated carbonation curing of construction materials and products is a combined carbonation method, combining the principles of dynamic and static methods. It was concluded that the optimal CO2 concentration in the gas-air mixtures used for carbonate curing is 30%–40%.

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ANALYSIS OF THE POSSIBILITIES OF IMPROVING THE QUALITY OF INSULATION FROM SECONDARY RAW MATERIALS AND THE PROSPECTS OF THEIR USE IN CONSTRUCTION

Bridges and tunnels Theory Research Practice ◽

10.15802/bttrp2021/233988 ◽

2021 ◽

pp. 85-90

Author(s):

А. V. RADKEVICH ◽

V. I. ANIN ◽

V. V. RADCHENKO ◽

A. A. SHUVAEV

Keyword(s):

Information Technologies ◽

Flame Retardants ◽

Building Materials ◽

Raw Materials ◽

Construction Materials ◽

Comparative Characteristic ◽

Value Analysis ◽

Secondary Raw Materials ◽

Modern Technologies

Purpose. Research and analysis of opportunities to improve the quality of insulation from secondary raw materials to study the prospects of their use in the construction industry as innovative materials with better performance than traditional ones. Materials made from secondary raw materials are of great importance not only in the formation of the building materials market, but also in the Ukrainian economy. The processing infrastructure creates a large number of jobs and tax deductions to the budget. In addition, the consumption of energy resources and the cost of servicing energy mains directly depend on the improvement of the thermal efficiency of premises and structures. The use of modern technologies of building materials combines economy, efficiency and durability of structures. Methodology. An important role in the development of modern construction production is played by the possibility of developing and improving the quality of building materials and technologies for their use. In modern conditions of the market of construction products there is an urgent need for constant modernization of construction processes, due to the efficient use of raw materials and the latest processing methods. With the use of modern information technologies and theoretical and methodological ways to solve problems, it becomes possible to consider options for improving the characteristics of building materials by combining qualitative characteristics and eliminating negative ones. Findings. This paper presents scientifically sound methods of modernization of secondary raw materials in the composition of insulation materials with high thermal and economic characteristics, which are able to compete in the market with traditional building materials. The analysis of flame retardants was carried out. Originality. Theoretical and methodological directions have been formed on the basis of research on the use of secondary raw materials for the manufacture of insulation in construction. The comparative characteristic is carried out. The conclusion on the competitiveness of the presented materials in the market of construction materials is made. Practical value. Analysis of the application of modern technologies for recycling on the basis of the latest theoretical and practical approaches, with the subsequent elimination of shortcomings. Consideration of the possibility of adding flame retardants to the composition of materials. Use of materials as insulation of premises and buildings. Development of processing infrastructure of Ukraine.

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Development of Flooring Materials with Cellular Waste

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.688.172 ◽

2013 ◽

Vol 688 ◽

pp. 172-175

Author(s):

Eva Tůmová ◽

Rostislav Drochytka

Keyword(s):

Mechanical Properties ◽

Building Materials ◽

Raw Materials ◽

Construction Materials ◽

Essential Element ◽

Lightweight Construction ◽

Secondary Raw Materials ◽

Flooring Materials

In the development of floor structures new building materials, additives, fillers and secondary raw materials of various properties are increasingly used. It is possible to develop new types of materials with different mechanical properties. Lightweight construction materials are the essential element for industrial floors lightening and thereby for reduce of their weight. This is especially beneficial for multi-storey buildings.

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Preparation of Alternative Hydraulic Binder Based on Secondary Raw Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1000.12 ◽

2014 ◽

Vol 1000 ◽

pp. 12-15

Author(s):

Jiří Švec ◽

Tomáš Opravil ◽

Jiří Másilko

Keyword(s):

Portland Cement ◽

Raw Materials ◽

Construction Materials ◽

High Volume ◽

Point Of View ◽

Hydraulic Lime ◽

Combustion Gases ◽

Secondary Raw Materials ◽

Hydraulic Binder ◽

Massive Scale

Reusing and recycling of secondary raw materials from high-volume industrial productions (especially form construction materials and binders fabrications) is very important way of conserving environment and it is also interesting from the economical point of view. The production of common hydraulic binders, especially Portland cement, burdens the environment with considerable amount of combustion gases and consumes energy in massive scale. Alternative (low – energy) binder can be used as Portland cement substitution in applications with lower mechanical properties requirements. Mined limestone wash sediments contain large amount of clay components, but there is also indispensable share of fine calcite. This composition makes these sediments a promising material for the preparation of hydraulic binders as Roman cement or hydraulic lime.

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Bio-based construction materials for a sustainable future

IABSE Congress, New York, New York 2019: The Evolving Metropolis ◽

10.2749/newyork.2019.0859 ◽

2019 ◽

Author(s):

Rijk Block ◽

Barbara Kuit ◽

Torsten Schröder ◽

Patrick Teuffel

Keyword(s):

Construction Industry ◽

Structural Engineering ◽

Building Materials ◽

Raw Materials ◽

Construction Materials ◽

Flax Fibres ◽

The Past ◽

Natural Building ◽

Paris Climate Agreement ◽

Primary Materials

<p>The structural engineering community has a strong responsibility to contribute to a more efficient use of natural resources. Nowadays the construction industry is by far the most resource intense industry sector, approximately 40-50% of all primary raw materials are used, which raises the question about the architects and engineer’s accountability. In this context and as a result of the Paris Climate agreement the Dutch government defined the program “Nederland Circulair in 2050”, which states the ambition to use 50% less primary materials in 2030 and to have a full circular economy in 2050.</p><p>One possible approach to achieve these ambitious goals is the application of renewable, bio-based materials in the built environment and to replace traditional, typically cement-based, materials. Already in the past natural building materials, such as timber and bamboo have been used widely, but in recent years new materials came up and provide new opportunities to be used in the construction industry. The authors explored various alternatives, such as hemp and flax fibres, mycelium and lignin-based fibres for composite materials, which will be described with various experimental and realised case studies.</p>

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THE SELECTION OF BUILDING MATERIALS TO IMPROVE THE COMFORT AND ECOLOGICAL SAFETY OF CITY HOUSING

URBAN CONSTRUCTION AND ARCHITECTURE ◽

10.17673/vestnik.2015.04.12 ◽

2015 ◽

Vol 5 (4) ◽

pp. 94-99 ◽

Cited By ~ 5

Author(s):

Anna Yur'evna ZHIGULINA ◽

Natalya Genrikhovna CHUMACHENKO

Keyword(s):

Building Materials ◽

Raw Materials ◽

Residential Buildings ◽

Construction Materials ◽

Environmental Safety ◽

Toxic Substances ◽

Chemical Additives ◽

Chemical Safety ◽

Sources Of Pollution ◽

Selection Of

The article is devoted to problems of creation of comfortable microclimate. Identifi es sources of pollution, completed their evaluation. Special att ention is paid to the selection of environmentally friendly building materials. In the production of building materials where toxic components can be industrial waste, replacing natural raw materials and chemical additives regulating the properties. In the operation of many building materials, especially those based on polymers, it is necessary to control the release of toxic substances resulting from degradation. For the assessment of comfort and environmental safety of housing is offered to create «Passports of residential buildings», which should be provided with information about construction materials used to evaluate this parameter, environmental home safety, including chemical safety as its component.

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Green gold of Africa – Can growing native bamboo in Ethiopia become a commercially viable business?

The Forestry Chronicle ◽

10.5558/tfc2014-127 ◽

2014 ◽

Vol 90 (05) ◽

pp. 628-635 ◽

Cited By ~ 1

Author(s):

Felix Böck

Keyword(s):

Building Materials ◽

Raw Materials ◽

Construction Materials ◽

Wood Products ◽

Raw Material ◽

Sustainable Construction ◽

Sustainable Business ◽

Subtropical Zone ◽

New Construction ◽

Increasing Demand

With concerns about climate change and the search for sustainable construction materials, significant attention is now being paid to Africa's natural resources. Ethiopia, known as Africa's political capital, has a rapidly expanding economy with increasing demand for new construction materials. Through public private partnerships projects the country is developing a sustainable business model to promote bamboo as a raw material. The subtropical zone of Ethiopia is home to approximately 65% of Africa's bamboo resources, an area of over 1 million hectares. Bamboo is potentially an ideal source of local, sustainable purpose-engineered building materials for growing cities not only in Ethiopia but across Africa. Production of conventional construction materials such as steel and concrete is expensive, highly energy intensive and unsustainable, requiring large quantities of water and is strongly dependent on imported raw materials. Bamboo is a renewable building material widely cultivated in Ethiopia but not yet utilized in modern construction. Structural Bamboo Products (SBP), similar to engineered wood products, have excellent potential to partially replace the use of more energy-intensive materials. Projects such as African Bamboo are taking steps in managing, cultivating and using Ethiopian bamboo species to help mitigate rapid deforestation in East Africa by creating alternative “wood” sources and sustainable business opportunities.

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Environmental and radiation assessment of construction materials in Tyumen

Samara Journal of Science ◽

10.17816/snv2021102105 ◽

2021 ◽

Vol 10 (2) ◽

pp. 40-44

Author(s):

Elena Viktorovna Zakharova ◽

Elena Viktorovna Gaevaya ◽

Leonid Nikolaevich Skipin ◽

Svetlana Sergeevna Tarasova ◽

Vasilyа Zinnurovna Burlaenko

Keyword(s):

Building Materials ◽

Specific Activity ◽

Raw Materials ◽

Natural Radionuclides ◽

Construction Materials ◽

Natural Radionuclide ◽

Maximum Activity ◽

Crushed Stone ◽

Natural Activity ◽

Effective Activity

The current pace of construction leads to the use of large volumes of construction raw materials, which must meet the regulatory indicators, including radiation. High levels of natural radionuclide activity, both in construction and finishing materials, affect changes in the gamma radiation indicators in the premises, which can negatively affect the health of people living in such facilities. Ecological and radiation assessment of building materials for the content of natural radionuclides showed an increased natural activity of potassium-40. The maximum activity values were observed in samples of bricks and expanded clay, where they were 799,0 and 622,0 Bq/kg, respectively. The lowest specific activity of natural potassium was observed in the crushed stone sample (21,3 Bq/kg). The specific activity of thorium-232 in building materials ranged from 2,1 to 53,3 Bq/kg. The activity of radium-226 in all the studied samples ranged from 4,4 Bq/kg (crushed stone) to 55,6 Bq/kg (cement). The specific effective activity of natural radionuclides in the studied building materials does not exceed the standard values (370 Bq/kg), therefore, they can be used in all types of construction and reconstruction.

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Radiological and physico-chemical characterization of red mud as an Al-containing precursor in inorganic binders for the building industry

Nuclear Technology and Radiation Protection ◽

10.2298/ntrp2102182k ◽

2021 ◽

Vol 36 (2) ◽

pp. 182-191

Author(s):

Ljiljana Kljajevic ◽

Miljana Mirkovic ◽

Sabina Dolenec ◽

Katarina Ster ◽

Mustafa Hadzalic ◽

...

Keyword(s):

Construction Industry ◽

Natural Radioactivity ◽

Red Mud ◽

Building Materials ◽

Raw Materials ◽

Construction Materials ◽

Polymerization Process ◽

Alkali Activation ◽

Silica Alumina ◽

Alkali Activated

The potential re-use of red mud in the building and construction industry has been the subject of research of many scientists. The presented research is a contribution to the potential solution of this environmental issue through the synthesis of potential construction materials based on red mud. A promising way of recycling these secondary raw materials is the synthesis of alkali-activated binders or alkali activated materials. Alkali-activated materials or inorganic binders based on red mud are a new class of materials obtained by activation of inorganic precursors mainly constituted by silica, alumina and low content of calcium oxide. Since red mud contains radioactive elements like 226Ra and 232Th, this may be a problem for its further utilization. The content of naturally occurring radionuclides in manufactured material products with potential application in the building and construction industry is important from the standpoint of radiation protection. Gamma radiation of the primordial radionuclides, 40K and members of the uranium and thorium series, increases the external gamma dose rate. However, more and more precedence is being given to limiting the radiological dose originating from building materials on the population these days. The aim of this research was to investigate the possible influence of alkali activation-polymerization processes on the natural radioactivity of alkali activated materials synthesized by red mud (BOKSIT a. d. Milici, Zvornik, Bosnia and Herzegovina) and their structural properties. This research confirmed that during the polymerization process the natural radioactivity was reduced, and that the process of alkali activation of raw materials has an influence on natural radioactivity of synthesized materials.

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