Use of waste calcium carbonate in sustainable cement
This contribution illustrates the use of waste calcium carbonate, obtained from marble slurry (waste marble, WM), in sustainable cement materials alternative to …
Effect of Eggshell Powder on the Hydration of Cement Paste
The presence of calcium carbonate in the cement pastes suppresses the conversion of ettringite to sulfoaluminate and facilitates the replacement of ... Eggshell powder is not only a filler material but also participates in the hydration product of cement. From the point of solid waste recycling, the utilization of eggshells is one of the ...
Maximising the benefits of calcium carbonate in …
To maximise the fi bene ts of calcium carbonate derived from alkaline waste fi carbonation in sustainable cements, we have demonstrated that: (i) different forms of calcium …
Synthesis of nano-calcium carbonate from waste cement …
This study introduces a novel procedure for generating high-purity nano-calcium carbonate (nCaCO 3) from waste cement powder, deploying hydrochloric acid (HCl), and sodium hydroxide (NaOH), both obtained through the electrolysis of sodium chloride (NaCl). Our approach, aimed at both environmental preservation and techno …
Bio-Cementation in Construction Materials: A Review
This was largely attributed to the precipitation of calcium carbonate on the surface of the bacterial silica fume concrete that further reduced the concrete pores and increased its robustness. In this respect, bacterial calcium carbonate worked as a filler of the bacterial silica fume concrete.
Maximising the benefits of calcium carbonate in sustainable …
We reviewed existing studies of the effects of different calcium carbonate forms on cement properties and underscored the viability of utilising various alkaline wastes to produce different ...
Use of Waste Calcium Carbonate in Sustainable Cement
This contribution illustrates the use of waste calcium carbonate, obtained from marble slurry (waste marble, WM), in sustainable cement materials alternative to Portland cement.
Hydration of cement pastes with calcium carbonate …
This study aims to further explore the hydration of cement pastes in the presence of the three calcium carbonate polymorphs, calcite, aragonite, and vaterite, with particular attention being paid to the stability and compatibility of metastable calcium carbonate polymorphs in cement systems. Calcium carbonate polymorphs were …
Utilizing Waste Cement for Carbon Dioxide Sequestration …
High-alkaline waste cement possesses significant potential for effectively capturing and sequestering carbon dioxide, transforming it into calcium-rich, highly reactive, supplementary cementitious materials. Water plays a pivotal role in facilitating this reaction, yet there is a conspicuous absence of extensive research in this domain. This …
Development of a process for producing high‐purity calcium carbonate
A new type of process for producing high-purity calcium carbonate from waste cement powder was developed. The process consists of two main reactions; extraction of calcium in the form of calcium ions from waste cement powder in a water slurry by pressurized CO2 (typically at several MPa), and precipitation of calcium …
Calcium Carbonate Cement: A Carbon Capture, …
tion process of carbon dioxide to biogenic or geologic calcium carbonate deposits was developed utilizing carbon dioxide-containing flue gas and high-calcium industrial solid waste as raw materials. The calcium carbonate cement reaction is based on the polymorphic transformation from metastable
Calcium Carbonate Concrete: Building on Recycling
Calcium carbonate concrete is made from waste concrete and CO2 from the air. How are these used to create this new building material? Concrete waste powder is put into water, and air bubbles are blown into this water to produce a calcium bicarbonate solution. The solution is flowed between the concrete waste particles in the container.
State-of-the-art review on recycled mussel shell waste in concrete …
The use of mussel shell waste as a substitute for concrete components is an alternative that may reduce the dependency on conventional natural materials. As a result, several scientific studies have been carried out to produce so-called ecological concrete. ... The calcium carbonate content of mussel shells is relatively lower than …
Use of waste calcium carbonate in sustainable cement
This contribution illustrates the use of waste calcium carbonate, obtained from marble slurry (waste marble, WM), in sustainable cement materials alternative to Portland …
Potential Use of Waste as a Source of Calcium for Microbial …
Microbial induced Calcium carbonate precipitation (MICP) is a promising new technology in the pursuit of sustainable concrete improvement. For MICP to occur, a medium with alkaline pH, dissolved inorganic carbon and a source of calcium must be used, associated with bacteria that serve as nucleation sites through their cell walls.
Carbon Capture and Utilization by mineralization of cement …
Article Open access 26 June 2024 Maximising the benefits of calcium carbonate in sustainable cements: opportunities and challenges associated with …
Production of carbon negative precipitated calcium …
Production of Carbon Negative Precipitated Calcium Carbonate from Waste Concrete Sterling Van der Zee1 and Frank Zeman2* 1. School of Environmental Studies, Queens University, Kingston, ON, Canada
Use of Waste Calcium Carbonate in Sustainable Cement
This includes slurries obtained from the quarrying, cutting and polishing of marble, which can be used as a source of calcium carbonate, alternative to primary limestone. This …
Carbon Capture and Utilization by mineralization of cement …
The Solubility of Calcium Carbonate and of Magnesium Hydroxide and the Precipitation of These Salts with Lime Water. ... Cecchi, E., Blais, J.-F. & Mercier, G. Valorization of waste concrete ...
Metal extraction and indirect mineral carbonation of waste cement
Metal extraction and indirect mineral carbonation of waste cement material using ammonium salt solutions. Author links open overlay panel Hwanju Jo a, So-Hee Park b, Young-Nam Jang a, Soo-Chun Chae a, ... For example, calcium carbonate (CaCO 3) is used as a filler and coating pigment in papers, plastics, ...
Oyster shell waste as a concrete ingredient: A review
3. Oyster shell as cement replacement in concrete. Research activities centered on the use of waste as a substitute for cement have been done due to declining natural supply and its environmental implications [46].The content of CaCO 3 exceeding 90% in sea shell are very similar to the calcium carbonate content of calcium dust …
Calcium Carbonate Cement: A Carbon Capture, Utilization, and Storage
A novel calcium carbonate cement system that mimics the naturally occurring mineralization process of carbon dioxide to biogenic or geologic calcium carbonate deposits was developed utilizing carbon dioxide-containing flue gas and high-calcium industrial solid waste as raw materials. The calcium car …
Utilization of carbonated alkaline solid wastes in
The low grade-sustainable calcium carbonate sources were prepared by alkaline solid wastes. • The performance of low-grade-sustainable calcium carbonate-metakaolin-cement green binder was evaluated.
Alkali activation of waste concrete powder: Effects of alkali …
They discovered the transformation of crystalline phases of waste concrete, such as C–S–H, quartz, and calcium carbonate, to amorphous phases with an increasing amount of NaOH powder and temperature.
Development of a New CO2 Sequestration Process Utilizing …
We propose a new sequestration process for anthropogenic carbon dioxide (CO2) that uses waste cement. The proposed process consists of two main reactions. The first is the extraction of calcium ions (Ca2+) from waste cement particles by pressurized carbon dioxide (several megapascals of pressure). The second is the precipitation of …
Production of carbon negative precipitated …
The objective here is to sequester CO2 through the production of PCC via the recovery and carbonation of calcium from waste cement. The calcium is suitable for mineral carbonation and can be ...
Production of carbon negative precipitated calcium carbonate from waste
Some carbonates, such as Precipitated Calcium Carbonate (PCC), have industrial applications and may provide sufficient economic incentive for sequestering CO 2 should the product be a marketable commodity. Cement is a suitable source of calcium and can be recovered from waste concrete.
Calcium carbonate synthesis from waste concrete for …
Semantic Scholar extracted view of "Calcium carbonate synthesis from waste concrete for carbon dioxide capture: From laboratory to pilot scale." by Sanghyung Park et al.
Decarbonizing concrete: No time to waste | Knight-Hennessy …
Process Cement is traditionally manufactured by taking limestone (calcium carbonate) and breaking it down with heat (usually coal) to form calcium oxide and …
The role of calcium carbonate in cement hydration
It is also noteworthy that adding carbonate in the form of calcium carbonate to cement slightly reduces its buffering capacity towards subsequent carbonation, for example in atmospheric carbonation. If protection of embedded steel is important, it is desirable that improvements in cement performance, for example reduced permeability …