Abstract
The present study is aimed to develop a high strength concrete by using mineral admixtures of wood ash (WA), metakaolin (MK), and chemical admixture. In order to check the compatibility, physical and chemical properties of the materials are studied. The specific gravity, bulk density and fineness of the ordinary Portland cement, wood ash and metakaolin have been studied. When compare to other materials, metakaolin has a more fineness and it implies the more reactivity than the wood ash. Similarly, the physical properties of the fine aggregate and coarse aggregates are also studies. And compressive strength, water absorption test, rapid chloride penetration test is also conducted. From the test report, it can be noted that the maximum compressive strength is achieved 83 N/mm2 in 10% WA + 20% MK blended concrete. The lowest water absorption and chloride permeability were obtained as 2.5% and 348 C respectively in 10% WA + 20% MK blended concrete. At the end of the experimental works, all obtained results were correlated with each other. The water absorption is well correlated with compressive strength (R2 = 84.9%) and charge passed (R2 = 91.5%). Finally, the cost analysis was carried out to understand the cost benefits of using the wood ash and metakaolin in high strength concrete.
Highlights
In the modern world, the construction industry is taking part in the country’s development
It can be noted that concrete strength depends upon the water-cement ratio and the materials used that are used other than the conventional materials such as cement, fine aggregate, coarse aggregate, and water [3]
The fresh state properties and harden properties of HSC is measured by means of conducting various tests such as compaction factor test, compressive strength test, fluid/water absorption test, rapid chloride penetration test (RCPT)
Summary
The construction industry is taking part in the country’s development. In order to reduce the cost of the HSC production without compromising the strength and durability of the concrete, some supplementary materials such as mineral admixtures or burnt ash or silica fume etc. The cement industry is one of the main sources which release large amounts of major consumer of natural resources like aggregate and has high power and emitting huge quantity of CO2 emission Using of such by product and agricultural wastes ashes solves a two kind of problems that the disposal as well providing a viable alternative for cement substitutes in concrete, and subsequent minimization of C O2 emission. Wood ash and metakaolin are used as a cement replacement material to develop the high strength concrete and to enhance the structural properties. It is planned to know the interdependence between the obtained results
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