What is the use of metakaolin?
Table of Contents
What is the use of metakaolin?
Metakaolin is a dehydroxylated form of the clay mineral kaolinite. Metakaolin is commonly used in the production of ceramics, but is also used as cement replacement in concrete. Metakaolin has a smaller particle size (∼1–2 μm) and higher surface area compared with portland cement, but a larger particle size than SF.
Why is metakaolin used in concrete?
Metakaolin is a pozzolan, probably the most effective pozzolanic material for use in concrete. This results in improvements to resistance of the hardened concrete to attack by sulfates, chloride ions and other aggressive substances, such as mineral and organic acids.
What is the difference between metakaolin and kaolin?
As nouns the difference between metakaolin and kaolin is that metakaolin is a dehydroxylated form of the clay mineral kaolinite while kaolin is a fine clay, rich in kaolinite, used in ceramics, paper-making, etc.
How will you obtain metakaolin?
Metakaolin, pozzolanic additive, may be obtained by calcination of kaolin clay. The optimal conditions of the thermal treatment are: calcination temperature of 650 °C and heating time of 90 min. Calcination results in dehydroxylation degree of 0.97.
What is metakaolin based geopolymer?
Metakaolin-based geopolymers are aluminosilicate materials that can be used as cationic dye adsorbents in aqueous system treatment. Our aim in this paper is to study the ability of geopolymer powder produced from metakaolin and alkaline activators to act as an adsorbent to remove methylene blue (MB).
Is Metakaolin a code?
Basic Details
| IS Number : | IS 16354 : 2015 |
|---|---|
| Technical Committee : | CED 2 ( Cement And Concrete ) |
| Language : | English |
| ICS Code : | ICS 91.100.10;91.100.15;91.100.30 |
| Product Id : | 16354 |
Is metakaolin a code?
What is meant by geopolymer?
Geopolymers are inorganic, typically ceramic, alumino-silicate forming long-range, covalently bonded, non-crystalline (amorphous) networks. Raw materials used in the synthesis of silicon-based polymers are mainly rock-forming minerals of geological origin, hence the name: geopolymer.
Is code for 43 Grade OPC cement?
8112
For 43 grade OPC, the IS code was IS 8112.
Is cement a code PDF?
CEMENT AND CONCRETE INDIAN STANDARD CODES
| IS Code | Title | Download Link |
|---|---|---|
| IS 650 : 1991 | Specification for Standard Sand for Testing of Cement | DOWNLOAD |
| IS 1199 : 1959 | Methods of sampling and analysis of concrete | DOWNLOAD |
| IS 1343 : 1980 | Code of Practice for Prestressed Concrete | DOWNLOAD |
What is metakaolin and how is it used?
Metakaolin is available in many different varieties and qualities. The purity will define the binding capacity for free lime. Some of them also provide special reactivity. Metakaolin is a valuable admixture for concrete and/or cement applications. Usually 8\% – 20\% (by weight) of portland cement
What is the reactivity of metakaolin?
The reactivity of metakaolin is based on chemical composition and reactive surface. Highly reactive metakaolin has become available as a considerably reactive pozzolanic material in concrete.
Is metakaolin reactive in concrete?
Home/ Concrete Technology / Concrete Properties / Highly Reactive Metakaolin Concrete – Properties and Applications. The reactivity of metakaolin is based on chemical composition and reactive surface. Highly reactive metakaolin has become available as a considerably reactive pozzolanic material in concrete.
What is metakaolin particle size?
Metakaolin is a porous, angular shaped, platy particle with a mean size that can range from 1 to 20 µm (Al-Akhras, 2006; Ambroise et al. 1994; Tafraoui et al., 2016). The specific gravity of metakaolin can fall between 2.20 and 2.60 (Mardani-Aghabaglou et al.