Separation process control system in the cement production …
The article developed a system for controlling the process of cement separation using neural networks. The control object is a separator. The task is to improve the cement production process ...
Biomineralization Process of CaCO3 Precipitation Induced by …
Concrete is still the most widely used building material in the world. However, due to the inherent shortcomings of high brittleness and low tensile strength of concrete, it is inevitable that some visible cracks will appear on the concrete surface during the long-term service [1,2,3,4].The appearance of cracks will affect the integrity and functionality of concrete …
Direct Olivine Carbonation: Optimal Process Design for a …
Employing mineral carbonation products as a cementitious substitute could reduce the cement industry's greenhouse gas (GHG) emissions. However, a transition toward low-emission cement requires financially competitive cement production at standardized product specifications. Aiming to tackle this challenge, we modeled and optimized a direct mineral carbonation process. In …
Bioconcrete-Enabled Resilient Construction: a Review
Applied Biochemistry and Biotechnology - Concrete, the ubiquitous cementitious composite though immensely versatile, is crack-susceptible. ... that bacterial technology would enhance the service life of the structures and thus help in saving the amount of cement being used globally, the production of which is responsible for 8–10% of global ...
Review Bio-cement production using microbially induced …
There are three basic construction biotechnology techniques called microbially induced calcium carbonate precipitation (MICP), enzyme-induced calcium carbonate …
Exploration on the Biotechnological Aspect of the Ureolytic …
Applied Biochemistry and Biotechnology - Biomineralization is a process that leads to the formation of minerals using the biologically or biotechnologically mediated route. ... Concrete is the widely used construction material worldwide, but the production of the cement used in it contributes to almost 7 % of the global anthropogenic CO 2 ...
Concrete production sustainability: the case for belite …
Concrete, made from Portland cement, water, aggregates (sand, natural gravel, or crushed stone), additions and admixtures, is the most manufactured product in the world, 2.3 per person per year: that means 7 km 3 per year. Concrete production sustainability has to be framed within the cement industry perspective.
Integrated Carbon Capture and Utilization in the Cement …
Although cement comprises only around 10% of the total weight of concrete, it contributes to approximately 70% of the greenhouse gas emissions associated with concrete production. Cement production has a typical carbon footprint between 600 and 900 kg of carbon dioxide (CO 2) per ton of cement and is responsible for 7% of all global CO 2 emissions.
Trace Elements in Biochemistry
Semantic Scholar extracted view of "Trace Elements in Biochemistry" by H. Bowen. Semantic Scholar extracted view of "Trace Elements in Biochemistry" by H. Bowen ... Emission inventories indicate that thallium, a highly toxic metal, is emitted during coal burning and cement production. These estimates have been established only for the 1980s and ...
Impact of utilizing solid recovered fuel on the global …
Cement is one of the most widely used building materials in the world, with global cement production of 4.7 billion metric tonnes (Mts) in 2016 (CEMBUREAU, 2017).The production of cement is an energy-intensive process with an estimated average thermal energy requirement of 3.4 GJ for 1 tonne clinker globally in 2018 ().Cement production is also the second largest …
Bio-cement: A sustainable approach in the construction sector
Chemically, bio-cement is calcium carbonate produced through hydrolysis of urea and calcium chloride through microbes by utilizing a well-known mechanism, microbial …
A Literature Review of Bio-cement: Microorganisms, Production, Properties, and Potential Applications.
An ideal bacterium for the SH effect of cement-based materials has an efficient metabolic activity that leads to the production of carbonate, tolerance to the alkalinity of concrete matrix, high …
Microbial Concrete—a Sustainable Solution for Concrete …
In this review, we discuss the role of microbes in influencing the various properties of concrete such as compressive strength, flexural strength and tensile strength by reducing …
A systematic review on the impact of cement industries on …
1 Department of Biochemistry, Mansarov ar Global University, Sehore, Madhya Pradesh, India ... Cement production produces a lot of pollution in terms of emissions. ~40% of these emissions are due ...
Biocement: A Novel Approach in the Restoration of …
Cement has an annual output of about 10 km 3 /year and is also one of the most commonly used materials in the construction industry (Flatt et al. 2012; Pacheco-Torgal and Labrincha 2013; Sikder and Saha 2019).Cement is the only component produced, while other local materials are naturally accessible. One ton of cement manufacturing generates about …
(PDF) An Insight into the Chemistry of Cement—A …
What is sure is that the hydration mechanism plays a pivotal role in the development of cements with specific final chemical compositions, mechanical properties, and porosities. This document...
A systematic review on the impact of cement industries on …
Cement plant exposure can have a negative influence on the health of both employees and the general public. Gaseous matter and particulate matter are unrestrained into the surroundings during cement making and carriage (Raffetti et al. 2019).NOx, SOx, CO 2, CO, H 2 S, volatile organic carbons, dioxin, furans, and particulate matter are common emissions …
Relationship between Bacterial Contribution and Self …
Bacterial cell as an active nucleation centre. The result of the SH effect in bacteria-based concrete is a chemical reaction between Ca 2+ and CO 3 2+ ions in the bacteria microenvironment, with the formation and maturation of CaCO 3 crystalline on an electronegative cell surface. This would confirm the previously stated fact that bacterial cells are attributed to the BICP effect as …
Explore Raw Material Used For Cement Production | JK Cement
Cement is the most essential construction material that acts as a binding agent for concrete, laying bricks and more. From limestone to clay and supplementary additives, each ingredient contributes to the durability and strength of cement. Let us learn about the essential raw materials used for cement production. Composition of Cement
Biocement
Concrete production is a highly intensive energy-consuming process and presently facing a number of challenges in reducing the carbon footprint and making it more economic. Sustainable technologies in maintaining concrete structures are proving to be a great challenge. Microbially induced carbonate precipitation (MICP) has developed as a novel ...
(PDF) An Insight into the Chemistry of Cement—A Review
Even if cement is a well-consolidated material, the chemistry of cement (and the chemistry inside cement) remains very complex and still non-obvious.
The development of cement and concrete additive: based …
It was found that xylonic acid is approximately twice as effective as lignosulfonate in cement and concrete tests and can be effectively utilized in concrete water reducer application. The present work attempted to utilize xylose by converting it to an aldonic acid. ... {Applied biochemistry and biotechnology}, year={2006}, volume={129-132 ...
Cement Chemistry
Cement is a general term often applied to any binder material, and constitutes a defining ingredient in concrete manufacturing. The following terms describe intermediates along the cement production pathways and specific subsets of cementitious materials with unique properties and characteristics [2, 7].
Biochar-concrete: A comprehensive review of properties, production …
The avoided concrete production, which included the production of Portland cement (PC) and the use of recycled aggregate, contributed to a reduction of 349.9 kg CO 2-eq/FU. Similar to the agricultural soil application, the WH biochar preparation and the carbon content sequestration contributed 263.5 and − 481.3 kg CO 2-eq/FU, respectively.
Thermodynamic modelling of cements clinkering …
World cement production is about 4.3 billion tons per year 1, with an average consumption of raw materials of about 1.6 tonnes for each tonne of cement manufactured 2. Valorisation of waste or by ...
A practical guide to improving cement manufacturing …
The cement production process 1. The Quarry: The cement production process begins with the extraction of limestone and clay from the quarry. 2. Crusher and Pre-Blending: The material is then crushed to reduce particle sizes and blended to reduce variability in composition. 3. Raw Mill and Kiln: Raw materials and additives are
A systematic review on the impact of cement industries …
second-largest cement producer, behind China, with 337.32 million tonnes produced in 2019. India has a total installed capacity of 537 million tonnes, accounting for 7.10 percent of global cement production. According to the United States Geological Survey (USGS), total cement production in 2018 was 4.1 billion tonnes.
Deep decarbonisation of industry: The cement sector
2017, equivalent to a reduction in cement per capita from 0.5 to 0.3 tonnes per person (3). The CO 2 intensity of cement production over that period has improved by about 7% (0.6t of CO 2 emitted per tonne of cement in 2017) (2). By 2050, cement production in the EU is expected to remain below pre-2010 levels, ranging between 165Mt
Decarbonising cement and concrete production: Strategies, …
Cement production is a complex and essential process that involves several stages and impacts various aspects of the construction industry and the environment. The first step in cement production is the extraction of raw materials, primarily limestone, clay and shale [34]. These materials are typically obtained from quarries or mines, where ...
Five questions on how biochemistry can combat climate …
The biggest culprit behind this carbon footprint lies in the production of Portland cement . When ingredients like limestone and silicates are heated to ∼1450 °C, calcium carbonate breaks down into calcium oxide and carbon dioxide and subsequently forms calcium silicate hydrates, which acts as a glue in concrete [ 33 ].