Effect of Metakaolin on the Properties of Concrete

IJSRD, 2014

Extensive research work for decades also is in progress throughout the globe in concrete technology in finding alternative materials which can partially or fully replace ordinary Portland cement (OPC) and which can also meet the requirements of strength and durability aspects. Amongst the many alternative materials tried as partial cement replacement materials, the strength, workability and durability performance of industrial by products like flyash, blast furnace slag, silica fume, metakaolin, rice husk ash, etc., now termed as complimentary cementitious materials (CCM) are quite promising. In this paper the evaluation of Metakaolin for use in Concrete is done.

— Use supplementary cementitious material is need of civil industry, because supplementary cementitious material (SCM) becomes essential part of high performance & high strength concrete mix design. These materials may be industrial waste, naturally available, by-product or manufactured consuming less energy. Some of widely used supplementary materials are fly ash(FA), bagasse ash(BA),rise husk ash(RHA), silica fume, granulated blast furnace slag(GGBS), metakaolin(MK), etc. Metakaolin is obtained from calcination of kaolinite between 650° – 800°c. The kaolin is transformed to an amorphous phase which is metakaolin. It has been widely used as a pozzolanic material in mortar and concrete. This paper overview of work carried out on the use of metakaolin as a partial replacement to cement in mortar and concrete.

Concrete is a basic material for the construction industry. Due to infrastructure development in the developing countries, consumption of concrete is very high. The consumption of cement is also very high to meet the requirements. So there is a need to look after the supplementary / alternative materials for the cement, fine aggregate and coarse aggregate. The present work aims to look after the supplementary materials in the concrete. In this paper, supplementary materials like metakaolin has been used in the concrete. Concrete having compressive strength 35 MPa is used in the experimental investigation. Mechanical properties like compressive strength, split tensile strength and flexural strengths are compared with modified concrete. Apart from that, the modified concrete has been evaluated using non-destructive tests like rebound hammer and ultrasonic pulse velocity. Also a relationship developed between the compressive strength and non-destructive tests. Based on the results, the performance of modified concrete is better than the normal concrete.

International Journal of Advance Research and Innovative Ideas in Education, 2018

The overall production of the cement has greatly increased which results lots of problems in environment as it involves the emission of CO2 gas. Environmental concerns, stemming from the high energy expense and carbon dioxide emission associated with cement manufacture have brought about pressures to reduce cement consumption through the use of supplementary materials. Materials such as Metakaolin, fly ash have good pozzolanic activity and are a good material for the production of high strength concrete which is getting popularity because of its positive effect on various properties of concrete. In this review the mechanical properties of Metakaolin and fly ash as a supplementary cementitious material are discussed.

International journal of engineering research and technology, 2018

Cement concrete is the most widely used material for various constructions. Properly designed and prepared concrete results in good strength and durability properties. Even such well designed and prepared cement concrete mixes under controlled conditions also have certain limitations because of which the above properties of concrete are found to be inadequate for special situations and for certain special structures. Hence variety of admixtures such as fly ash, Silica fume, rise husk ash and stone dust etc., are used along with cement in certain percentages to enhance the properties of the regular cement concrete. Hence an attempt has been made in the present investigation on replacement of cement with recent new pozzolinic material of Metakaolin up to certain percentages. To attain the setout objectives of the present investigations, the grade of concrete M 20 mix case have been taken as reference concrete. Hardened concrete is tested for strength properties such as Cube Compressive strength, Split Tensile Strength, Modulus of Rupture and Youngs Modulus of Elasticity. The variations of above strengths with variation in different % of Metakaolin have been studied.

— The word high strength concrete is defined as concrete that meets special combinations of strength and uniformity requirements that cannot always be achieved routinely using conventional constituents and normal mixing, placing, and curing practices. The concrete is widely used in large scale in the constr uction industry, not only for its strength and also with the demands of high strength, high performance and high durability at desirable cost and also at the same time the demand for reducing the usage of cement quantity with partial replacement of other p ozzalanic materials to save the environment without any deviations in the concrete strength blended cement is introduced into the construction industry to partial replacement of cement with any other pozzalonic materials to reduce the quantity of ordinary Portland cement, and also to reduce the cost of concrete. The blended cements are also used to increase the compressive strength of concrete and sometimes to prepare high performance concrete. In this research work Metakaolin and Fly ash materials are used for partial replacement of cement. To achieve required strength, the water cement ratio within the specified range have been selected water cement ratio has 0.45 for and M30 grade of concrete respectively. The optimum dosage of percentage of replacement of cement with metakaolin was found 30%, 20% and 20% for the constant of cement replacement with fly ash is 10%, 20% and 30% respectively.

International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022

The literature study shows that some industrial waste material such as fly ash, GGBS, silica fume, metakaoline, etc. are good way to exchange cement in concrete and make it durable, strong, economic and environment friendly and also gives strength as per conventional concrete. These materials are often used as supplementary cementitious material because the replacement of cement in various percentages and make it high performance concrete which may be utilized in high rise building, flyovers, bridges, etc In this literature review study metakaoline looks to be promising supplementary cementitious material for high performance concrete. The substitution proportion of metakaoline is to be used was 0%, 10%, 20%, 30%, 40% by the weight of the cement. The cubes were made to check the compressive strength at 7, 28 and 56 days of curing. The results shows the many difference between the replacing mix upto last percent has effect on strength as compared with mix without metakaolin.

Concrete is the most well-known, prevalent and comprehensively used building material worldwide with its usage almost doubling the mutual utilization of other materials like wood, steel and plastics. From the beginning of researches in concrete, the researchers and scientists have always tried to utilize and incorporate various materials, which are industrial waste products or agricultural wastes into concrete in such a manner that it can provide a effective mean not only to dispose of such wastes but also effectively enhancing some properties and nature of concrete. Researchers many times tried to incorporate metakaolin with concrete so that the properties of concrete get enhanced. The use of metakaolin formerly provided a expedient means for its disposal rendered as waste, but it has been feasible to alter its properties, subsequent to its mutual use along with super plasticizer. They incorporate metakaolin in different amounts so that to find out at what amount the properties will enhance better. They also tried to incorporate metakaolin with other materials like fly ash, silica fume etc. By doing such experiments researchers got different results and conclusions.

IRJET, 2022

Concrete is very important elements since it is utilised in building. The focus of this project work is on the utilisation of cementitious materials such as, Ground Granulated Blast Furnace slag (GGBS) with various percentages of 10%, 20% & 30% and Metakaolin of 5%, 10% & 15% In concrete, as a partial substitute for cement. Water Cement Ratio of, 0.4%, 0.43% & 0.45% and about 162 Cubes of size, 100 ×100 ×100 mm and 162 cylinders of size 300 mm height and a diameter of 150 mm were cast in M40 concrete and tested for compressive and spilt tensile strength for 7 and 28 days, respectively. To determine their strength qualities. Steel fibres of 0.5%, GGBS of 10%, Metakaolin of 10% And water cement ratio, of 0.4% is used in beam of size 150x250x1500mm is cast for M40 grade of concrete and tested for flexural behaviour of 28 days. The acquired results were regarded to be encouraging, and this study can be expanded by adding other mineral admixtures

IRJET, 2021

Concrete is extensively habituated construction material. Product of Portland cement releases significant quantum of Co2. One tonne of Portland cement clinker product releases roughly one tonne of Co2 and other gases. Environmental issues play essential part in the sustainable development of concrete industry. One of the major challenges now in concrete industry in India is to meet the demand created by massive structures, fast industrialization and urbanization needs early stripping formwork. Moment numerous inquiries are going for the relief of Portland cement, using numerous waste materialss like fly ash and GGBS. The use of Mineral Amalgamation to drop the content of Portland cement results not only in an environmentally friendly product but also gives multitudinous gains to the parcels of fresh and toughened concrete similar as enhanced plasticity, better unity, low heat of hydration, lower permeability etc. I'm studying on the strength and continuity by blend design, compressive test and plasticity test of concrete cell by partial relief of cement by metakaolin. Metakaolin is one of the innovative complexion products developed in recent times. It's produced by controlled thermal treatment of kaolin.