:Mineral AdmixturesHigh Performance ConcretePublish Year:2021As far as the current concrete industry is concerned, proper use of mineral admixtures (such as slag, fly ash, silica fume, etc.) and chemical admixtures (such as
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· 1. Introduction In recent years, as a typical structural material, high performance concrete (HPC) is widely used in civil engineering because of its excellent performance, namely high workability, high strength, high durability and long-term performance [1], [2], [3].For
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ddition of silica fume and metakaolin causes. increase in strength at all ages. But fly ash gains strength at 56 and 90 days.From the results, it was found that the optimum repl. lica fume, metakaoli. and fly ash are 10%, 10% and 15%, respectively.REFERENCESACI 363 R-92 (1993). “State-of-the-Art Report on High Strength Concrete”, ACI.
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· Due to the addition of mineral admixtures, early-age shrinkage cracking is a common feature in high-performance concrete (HPC). Chloride diffusivity of HPC due to early-age shrinkage cracking was investigated through rapid chloride migration (RCM) method. Restrained/unrestrained slabs made of HPC containing fly ash (FA) and ground
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· Concept of High Performance Concrete (HPC) A concrete mixture which has high workability, high strength, high modulus of physical property, high density, high dimensional stability, low permeability and resistance to chemical attack is generally said to be high performance concrete. The above-mentioned performance requirements can
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· no comment. Mineral admixtures are mostly derived from other substances and not chemically manufactured. Mineral admixtures make concrete mixtures more cohesive, economical, reduce permeability, increase strength, and influence other properties of concrete. Mineral admixture impacts the nature of the hardened concrete
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· The present research explores the strength, durability, microstructure, embodied energy, and global warming potential investigations made toward cleaner production of high-performance concrete (HPC) using a new composition. For this, various mixes were considered by replacing cement with metakaolin (MK) and silica fumes (SF)
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· In the paper, the early age tensile creep behavior of high performance concrete (HPC) containing mineral admixtures was experimentally investigated. The results showed that, when the loading age was at 1 d and 2 d, the addition of fly ash (FA) increased the early age specific tensile creep of HPC, while blast furnace slag (BFS)
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· This study developed a prediction model of the carbonation depth of concrete containing mineral admixtures based on an intelligent algorithm. A carbonation test database of mineral admixture concrete was established considering the influence of 17 parameters. The intelligent algorithm and three existing carbonation depth prediction
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· This paper addresses the development of an eco-friendly Ultra-High Performance Concrete (UHPC) with efficient cement and mineral admixtures uses are investigated. The modified Andreasen & Andersen particle packing model is utilized to achieve a densely compacted cementitious matrix.
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The cement has been replaced by GGBS accordingly in the range of 0% (without GGBS), 10%, 20%, 30%, 40% and 50% by weight of cement for M20 and M30 mix. Concrete mixtures were produced, tested and compared in terms of compressive, split tensile and flexural strength with the conventional concrete. Download Free PDF.
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· A mix design method is proposed for self-compacting high performance concrete. • Superplasticizer saturation dosage of mortar is similar to superplasticizer demand for concrete. • Efficiency factors of mineral admixtures are used to predict compressive strength.
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· Taking high performance concrete (HPC) in hydraulic engineering as an example, this paper discusses the influence of different mixing methods of slag powder and fly ash on its frost resistance and
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Date: 11/1/1994. An extensive study of the improvement in concrete performance associated with the addition of high reactivity metakaolin (HRM), a mineral admixture, was performed. The testing study focused on "realcrete," produced in a ready-mix batch plant as opposed to a controlled laboratory study. HRM performs similarly to silica fume,
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In general, all mineral admixtures reduce bleeding of concrete. Admixtures with finer particle size and higher specific surface area are suitable for preparing high density and low permeability concrete.
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:Properties of Mineral AdmixturesMineral Admixtures Used in ConcreteThe present work reviews the various mineral admixtures used in concrete which modifies the concrete properties. In this study, cement is partially or completely replaced by
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Apr 20, 2015 • Download as PPT, PDF •. 96 likes • 39,642 views. Concrete is the most widely used construction material in India with annual consumption exceeding 100 million cubic meters. High performance concrete is a concrete in which certain characteristics are developed for a particular application and environment, so that it will
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· Due of this, the use of HPC (high-performance concrete) was advocated as well as investigated extensively around the turn of the century. The use of chemical admixtures and agro-wastes, as well as
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· Shrinkage deformation of concrete has been one of the difficulties in the process of concrete performance research. Cracking of concrete caused by self-shrinkage and temperature-drop shrinkage has become a common problem in the concrete world, and cracking leads to a decrease in the durability of concrete and even a safety hazard.
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· Mineral admixtures require air entrainment with the exception of MK and RHA for better protection from solidifying and defrosting. High-Performance Concrete is the solid meets the execution and prerequisites that are not to be gotten by traditional material, ordinary blending, putting and curing hones. In this investigation, a concise
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· High performance concrete provides improved durability and structural capacity compared to conventional concrete. It has a denser microstructure due to a lower water-cement ratio, making it more impermeable and durable. Various methods can be used to produce high strength concrete, including seeding, revibration, and using admixtures.
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:Properties of Mineral AdmixturesConcrete and Cement · In this paper, the preparation and mechanical properties of high performance concrete (HPC) using calcined and ultrafine crushed diatomite as mineral
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Admixtures for concrete Peter A. Claisse, in Civil Engineering Materials, 201624.1 Introduction This chapter describes chemical admixtures that are liquids or powders added in small quantities to a concrete mix. The term “ mineral admixtures ” is used to describe minerals, such as PFA and GGBS that are used as partial cement replacements. .
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High-Range water reducers (superplasticizers) Can reduce water content from 12% to as much as 40% and are typically used in concretes designed to have slumps of 8 to 11 inches. They can be used to either increase slump (by 4 to 8 inches) or lower the water content of hot weather concrete mixes.
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· PDF | The present work reviews the various mineral admixtures used in concrete which modifies the concrete properties. In metakaolin in high performance concrete. Int J Innov Res Sci , Eng
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Practice in many units in our country shows that to prepare qualified high performance concrete, the mineral admixture content should reach at least 30%, and it is better to use it in combination. A large amount of concrete mixed with mineral admixtures also meets the requirements of environmental protection and sustainable. 18.
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· The requirement for high-performance concrete has increased day by day due to its better performance. Due to its strength, durability, and high modulus of elasticity, high-performance concrete has predominantly been employed in constructing large-scale civil engineering structures, e.g., tunnels, bridges, pavements, and high-rise
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· The results, in general, showed that mineral admixtures improved the properties of high-performance concretes, but at different rates depending on the binder type. While SF contributed to both short- and long-term properties of concrete, FA required a relatively longer time to get its beneficial effect. In the long term, both mineral
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The findings of this study will contribute to the understanding of utilizing ultrafine mineral admixtures to enhance the performance of high-performance concrete, offering insights
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· Compressive strength, gas permeability and carbonation of high performance concrete (HPC) with fly ash (FA) or ground granulated blast furnace slag (GGBFS) were experimentally investigated and the relationships among them were analyzed.Binders: Ordinary Portland cement (OPC), class II FA and GGBFS complying
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