List of Articles Metakaolin

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  1 - EffectofMetakaolin and Nano-SiO2onshort and Long-term shrinkageofself-compactingcement sandmortar
  Hassan Soltanshahi
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  2 - Influence of Nano-Particles on Characteristics of MetakaolinContained Cement Paste
  Mehran Seyed. Razzaghi A. Shekari J. Poursharifi M. Rajabi
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  3 - Effect of temperature and activator molar of Na2O to SiO2 in the process of synthesis and microstructure of cement geopolymer
  M Asadi A Nemati R Naghizadeh K Arzani J Fahim
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  4 - Determination of the Properties of Self-compacting Concrete Containing Metakaolin as a Replacement for Cement and Limestone Powder
  Seyed Fathollah Sajedi Milad Orak
  10.30495/civil.2022.689514
  Today, the tendency to use self-compacting concrete (SCC) is expanding due to its advantages. Manufacturing of SCC requires increasing the amount of cement used, which will result in the more environmental pollution due to the increased cement production, trying to use More

  Today, the tendency to use self-compacting concrete (SCC) is expanding due to its advantages. Manufacturing of SCC requires increasing the amount of cement used, which will result in the more environmental pollution due to the increased cement production, trying to use pozzolans to reduce cement consumption will be an essential step towards sustainable development. So, efforts to use pozzolans to reduce cement consumption will be an essential step towards sustainable development. Accordingly, in this study, by replacing a part of the cement and limestone powder with metakaolin as an active pozzolan, some properties of the produced concrete including rheology, mechanical and durability were evaluated. For this aim, metakaolin with 10%, 15%, 20%, 25% and 20%, 25%, 30%, 35% replaced the cement and limestone powder, respectively (without changing the cement content). The self-compacting properties of the concrete specimens were evaluated in the form of slump flow tests, L-box, U-box and J-ring, as well as mechanical properties including compressive and splitting tensile strength, and durability including water penetration depth and rapid chloride ion penetration (RCPT). The results present that the utility of metakaolin in the manufacturing of self-compacting concrete as an independent alternative to the part of cement and limestone powder has improved the mechanical properties of concrete, but has reduced its consistency. In order to solve this problem, it is necessary to increase the percentage of consumable superplasticizer used until it reaches the desired consistency level. Replacement of cement by 20% metakaolin reduced water permeability and RCPT by 35% and 20%, respectively, and replacing of the limestone powder by 35% metakaolin reduced water permeability and RCPT by 70% and 35%, respectively. Manuscript profile
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  5 - An experimental study on effects of glass fiber and Metakaolin on the rheological, mechanical, and durability properties of self compacting concrete
  Mir Pouya Naseri Alavi Payam Shafiei Hassan Javanshir
       Previous studies has shown that reinforced self-compacting concrete with fiber is more suitable for structural performance. The purpose of this study was to evaluate the effects of Metkaolin and alkali resistant glass fibers on the performance o More

       Previous studies has shown that reinforced self-compacting concrete with fiber is more suitable for structural performance. The purpose of this study was to evaluate the effects of Metkaolin and alkali resistant glass fibers on the performance of self-compacting concrete. In this study, the rheological properties (L-Box, Slump flow, T50) and mechanical properties (compressive strength, tensile and flexural strength), and durability (chloride ion penetration and water absorption) have been investigated. The results of the experiments showed that by increasing the amount of fiber, the concrete performance decreases. It was also found that the glass fiber had no positive effect on the compressive strength of the concrete. The tensile and flexural strength of self-compacting reinforced concrete increases with increasing fiber content. Durability studies have shown that the presence of glass fiber initially increases the resistance to chloride ion penetration and then reduces it, and also increases the gradual absorption of concrete water. The results of the experiments showed that the simultaneous presence of Metkaolin and glass fibers with optimal percentages can significantly improve the mechanical properties and durability of self-compacting concrete Manuscript profile
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  6 - Investigating some effects of using Metakaolin as pozolan in concrete
  Gholamreza saghir shams abadi Abdolkarim Abbasi dezfoli
  Development of concrete technology is undergoing for achieving high strength concrete. Metakaolin (MK) for obtaining high strength and durable concrete recently is used in industry. The relatively high micro particles and pozolan activity and reaction with calcium hydro More

  Development of concrete technology is undergoing for achieving high strength concrete. Metakaolin (MK) for obtaining high strength and durable concrete recently is used in industry. The relatively high micro particles and pozolan activity and reaction with calcium hydroxide of cement, causes lower voids, permeability and increasing durability. In the present research the history of pozolans and their materials specially MK and their effects on mechanical properties to achieve an optimize percentage of MK instead of cement were investigated. The tests are included as workability, absorbing water, relative density, electric resistance (that shows permeability and corrosion resistance) and compressive strength. The tests were carried out on 0%, 10%, 15% and 20% of MK in replacement of cement on 150x150 mm samples on 7 and 28 days after casting. The results show that 10% of MK has better workability. 15%  of MK higher compressive strength and 20% higher electric resistance and lower absorbing water and 15% have a reduced relative density Manuscript profile