The Experts below are selected from a list of 12708 Experts worldwide ranked by ideXlab platform
Franco Sandrolini - One of the best experts on this subject based on the ideXlab platform.
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tyre rubber waste recycling in Self Compacting Concrete
Cement and Concrete Research, 2006Co-Authors: Maria Chiara Bignozzi, Franco SandroliniAbstract:Rubberised Self-Compacting Concrete was prepared containing different amounts of untreated tyre waste and their mechanical and microstructural behaviour are investigated and discussed in this paper. The fresh and hardened properties of such materials are compared with those of a typical reference formulation of Self-Compacting Concrete. A comparison of the obtained compressive strengths with literature data confirms that Self-Compacting technology helps binding rubber phases.
Rafat Siddique - One of the best experts on this subject based on the ideXlab platform.
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Sustainable and Greener Self-Compacting Concrete incorporating Industrial By-Products: A Review
Journal of Cleaner Production, 2020Co-Authors: Nikita Gupta, Rafat Siddique, Rafik BelarbiAbstract:Abstract This paper presents an extensive critical review of various properties of Self-Compacting Concrete made with industrial by-products. The construction industry has recognized the worth of limited available natural resource like river sand, which is extensively used for the production of Self-Compacting Concrete. Also, the management and disposal of the industrial by-products has become a major challenge globally. Sustainable production thus comes into picture by incorporating the industrial by-products in Self-Compacting Concrete to benefit the environment as well as Concrete technology. This paper highlights the use of industrial by-products like waste foundry sand, coal bottom ash, waste tire rubber, copper slag, and waste glass as fine aggregate replacement in the development of green Self-Compacting Concrete. It discusses in detail, the physical and chemical properties of industrial by-products used in Self-Compacting Concrete. It comprehensively reviews the effect of using by-products on the fresh, strength and durability properties of Self-Compacting Concrete. Based on the reviewed literature, critical analysis has been carried out, and the future scope of work is addressed. These industrial by-products have a great potential to be utilized in Self-Compacting Concrete, leading to sustainable development.
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Self-Compacting Concrete - Procedure for Mix Design
2008Co-Authors: Paratibha Aggarwal, Rafat Siddique, Yogesh Aggarwal, Surinder M GuptaAbstract:Self-Compacting Concrete is a fluid mixture suitable for placing in structures with congested reinforcement without vibration. Self-Compacting Concrete development must ensure a good balance between deformability and stability. Also, compactibility is affected by the characteristics of materials and the mix proportions; it becomes necessary to evolve a procedure for mix design of SCC. The paper presents an experimental procedure for the design of SelfCompacting Concrete mixes. The test results for acceptance characteristics of Self-Compacting Concrete such as slump flow; J-ring, V-funnel and L-Box are presented. Further, compressive strength at the ages of 7, 28, and 90 days was also determined and results are included here.
J C Galvez - One of the best experts on this subject based on the ideXlab platform.
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on the mechanical properties and fracture behavior of polyolefin fiber reinforced Self Compacting Concrete
Construction and Building Materials, 2014Co-Authors: Marcos Garcia Alberti, Alejandro Enfedaque, J C GalvezAbstract:Abstract Fiber-reinforced Self-Compacting Concrete uses the flowability of Concrete in fresh state to improve fiber orientation, in due course enhancing toughness and energy absorption capacity. In the past few years there has been a boost in the development of Concretes with macro-synthetic fibers added. In this paper the mechanical properties of a Self-Compacting Concrete with low, medium and high-fiber contents of macro polyolefin fibers are studied. Their fracture behavior is compared with a plain Self-Compacting Concrete and also with a steel fiber-reinforced Self-Compacting Concrete. The results obtained showed that a polyolefin fiber-reinforced Self-Compacting Concrete has fracture properties analogous to a steel fiber-reinforced Self-Compacting Concrete. Furthermore, it is possible to fit this behavior within the existing standards requirements. Dispersion obtained for fracture mean values among the different amounts was analyzed by using a fracture surface analysis and the amount and distribution of fibers.
Anuj Dhiman - One of the best experts on this subject based on the ideXlab platform.
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A review on Self Compacting Concrete
International Journal of Research, 2016Co-Authors: Anuj DhimanAbstract:Self-Compacting Concrete (SCC), which flows under its own weight and doesn’t require any external vibration for compaction, has revolutionized Concrete placement. Such Concrete should have relatively low yield value to ensure high flow ability, a moderate viscosity to resists segregation and bleeding and must maintain its homogeneity during transportation, placing and curing to ensure adequate structural performance and long term durability. Self-Compacting Concrete (SCC) can be defined as a fresh Concrete which possesses superior flow ability under maintained stability (i.e. no segregation) thus allowing Self-compaction that is, material consolidation without addition of energy. Self-Compacting Concrete is a fluid mixture suitable for placing in structures with Congested reinforcement without vibration and it helps in achieving higher quality of surface finishes. Self-Compacting Concrete (SCC) is a modern Concrete technology that allows significant advantages compared to conventional Concrete. Extreme workability, Self-compaction without vibration combined with high Concrete quality allows new and interesting applications for the competitive users and creative specifies of Concrete. The advantages of SCC are important for the applicators (contractors) and Concrete producers (Ready mixed Concrete, Precast well as for the final users of the structure. Knowledge about its properties, design and production is essential for the successful use of SCC. Creativity is also necessary, because the use of this technology is just starting to spread and new, interesting applications for SCC are found every day. This paper will give some information about the advantages of SCC, typical applications, influence on the cost, technical properties, test methods and creating a typical mix design. Another focus is a selection of case studies which shows a variety of projects where SCC has been used successfully. As can be seen, advantageous applications for SCC are very diverse, the reasons for using SCC can be very different. KEYWORDS : Self Compacting Concrete; Flyash; Workability; Plasticizer.
Shami Nejadi - One of the best experts on this subject based on the ideXlab platform.
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Mechanical properties of conventional and Self-Compacting Concrete: An analytical study
Construction and Building Materials, 2012Co-Authors: Farhad Aslani, Shami NejadiAbstract:Abstract Self-Compacting Concrete can be placed and compacted under its own weight with little or no compaction. It is cohesive enough to be handled without segregation or bleeding. It can be used to facilitate and ensure proper filling of complex and multipart formworks and consequently offers good structural performance in heavily reinforced structural members. Modification in the mix design of Self-Compacting Concrete may significantly influence the material’s mechanical properties. Therefore, it is vital to investigate whether all the assumed hypotheses about conventional Concrete are also valid for Self-Compacting Concrete structures. The present study includes: (a) evaluation and comparison of the current analytical models used for estimating the mechanical properties of Self-Compacting Concrete and conventional Concrete, and (b) proposing new models for the mechanical properties of both Self-Compacting and conventional Concrete mixtures. The investigated mechanical properties are modulus of elasticity, tensile strength, and compressive stress–strain (σ–e) curve. Extensive databases used for evaluating the analytical models include the measured modulus of elasticity of 110 Self-Compacting Concrete mixtures and 32 conventional Concrete mixtures, measured tensile strength of 81 Self-Compacting Concrete mixtures and 26 conventional Concrete mixtures, and compressive stress–strain curve of 28 Self-Compacting Concrete mixtures and four conventional Concrete mixtures.