6. Mineral Admixtures
Mineral admixtures, commonly by-products from industrial processes, are added to concrete to enhance its performance. They improve workability, durability, and sustainability while reducing costs. Various types of mineral admixtures, including pozzolanic and hydraulic materials, play significant roles in concrete hydration and long-term behavior.
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What we have learnt
- Mineral admixtures enhance both fresh and hardened concrete properties.
- Different types of mineral admixtures include pozzolanic, hydraulic, and inert fillers.
- Proper use of mineral admixtures can improve workability, durability, and reduce environmental impacts.
Key Concepts
- -- Pozzolanic Admixtures
- Materials that react with calcium hydroxide in the presence of water, forming additional C-S-H.
- -- Hydraulic Admixtures
- Materials that can exhibit cementitious properties when activated.
- -- Fineness
- The surface area of the admixture that affects its reactivity and performance in concrete.
- -- Sustainability
- Using mineral admixtures can significantly reduce cement consumption and CO2 emissions.
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