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Related Concept Videos

Hydration of Cement01:24

Hydration of Cement

173
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
173
Portland Cement01:21

Portland Cement

182
Portland cement is the essential binding ingredient in concrete, made from finely ground materials including lime, iron, silica, and alumina. Lime is derived primarily from limestone, marble, marl, seashells, and clays, which also supply iron and alumina, while silica is sourced from sand, chalk, and bauxite. Contemporary manufacturing of Portland cement is a significant source of carbon dioxide emissions, prompting research into reducing its content in concrete through alternative...
182
Energy Considerations in Open Channel Flow01:27

Energy Considerations in Open Channel Flow

56
Open channel flow, where a fluid flows with a free surface exposed to the atmosphere, is primarily governed by gravitational and surface effects, distinguishing it from closed conduit or pipe flow. In open channels such as rivers, canals, and artificial channels, energy analysis provides valuable insights into flow behavior and the relationship between depth, velocity, and slope.Specific Energy and Flow DepthIn open channel flow, the specific energy, E, combines the gravitational potential...
56
Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

145
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
145
Potential-Energy Criterion for Equilibrium01:16

Potential-Energy Criterion for Equilibrium

497
Potential energy or potential function plays an essential role in determining the stability of a mechanical system. If a system is subjected to both gravitational and elastic forces, the potential function of the system can be expressed as the algebraic sum of gravitational and elastic potential energy. If the system is in equilibrium and is displaced by a small amount, then the work done on the system equals the negative of the change in the system's potential energy from the initial to...
497
Strength of Cement01:20

Strength of Cement

115
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
115

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Related Experiment Video

Updated: May 15, 2025

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Integrating Stock-Flow Modeling and Energy System Optimization to Explore Decarbonization Pathways for China's Cement

Jingyang Song1, Xiaoke Su1, Lijing Hou1

  • 1College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.

Environmental Science & Technology
|April 7, 2025
PubMed
Summary
This summary is machine-generated.

Material efficiency strategies can significantly cut cement demand by 57%, contributing nearly 50% to decarbonization efforts and lowering costs. This approach reduces reliance on carbon capture for net-zero emissions in the cement sector.

Keywords:
bulk materialcementenergy system optimization modelmaterial efficiency strategiesstock-flow analysis

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Area of Science:

  • Environmental Science
  • Engineering
  • Climate Change Mitigation

Background:

  • The cement sector is a major contributor to global greenhouse gas emissions.
  • Decarbonizing cement production is challenging, necessitating exploration of diverse mitigation strategies.
  • Previous research focused on demand-side material efficiency but overlooked supply-side responses.

Purpose of the Study:

  • To develop a framework for projecting comprehensive decarbonization pathways for cement-based materials.
  • To assess the impact of material efficiency strategies on cement demand and the broader energy system.
  • To evaluate the cost-effectiveness of decarbonization pathways, including CO2 uptake.

Main Methods:

  • Coupling detailed stock-flow modeling with a bottom-up energy system optimization model.
  • Utilizing integrated assessment models to simulate decarbonization scenarios.
  • Conducting a pilot case study on China's cement sector.

Main Results:

  • Material efficiency strategies can reduce cement demand by 57%.
  • These strategies contribute approximately 50% to the cumulative decarbonization effort.
  • Reduced cement demand lowers the need for supply-side decarbonization technologies and associated costs.

Conclusions:

  • Material efficiency offers a cost-effective pathway to net-zero emissions in the cement sector.
  • Combining material efficiency with CO2 uptake minimizes reliance on carbon capture and storage.
  • The study provides a comprehensive approach to decarbonizing cement-based materials.