Self-compacting Concrete—Optimization of Mix Design Procedure by the Modifications of Rational Method
19 Feb 2020-pp 369-396
TL;DR: In this article, the optimization of mix proportion design has been determined by adopting the proposed rational mix design method or Japanese method with necessary modifications in consonance with the guidelines of EFNARC.
Abstract: Self-Compacting Concrete (SCC) is a special type of concrete recognized for placing in congested reinforced structures without any application of external vibration. Self compactibility can be determined by the properties of material constituents and the design of mix proportions. The absence of an approved code in India on mix design proportions and characteristics of material constituents to achieve compactibility in SCC has necessitated to determine a method for mix design of SCC. Though some researchers have carried out investigations to determine a proper mix design for producing SCC. In this investigation, the optimization of mix proportion design has been determined by adopting the proposed rational mix design method or Japanese method with necessary modifications in consonance with the guidelines of EFNARC. A suitable mix using the marginal aggregates was selected and numerous trial mixes (sixty-five) were carried out with the varying mix parameters like binder content, water-binder ratio, fine aggregate-coarse aggregate ratio, percentage of superplasticizer and viscosity modifying admixtures. The test results of this study are presented in this paper and a successful attempt has been made to determine the suitable mix design for producing SCC.
Citations
More filters
TL;DR: In this article, the use of pozzolanic material like Metakaolin (MK) as a mineral admixture and non-pozzolastic material like Waste Marble Powder (WMP) as filler material.
18 citations
TL;DR: In this article, the influence of surface preparation on the effectiveness of CFRP reinforcement on the load-bearing capacity of high-performance, self-compacting, fibre-reinforced concrete (HPSCFRC) is examined.
6 citations
TL;DR: In this article , an innovative nano-engineered self-compacting concrete was prepared using 0.1, 0.2 , 0.3 and 0.5% graphite nano/micro platelets (GNMPs).
2 citations
TL;DR: In this paper , the influence of different water to cement ratios (0.32, 0.34, and 0.36) with other consistent ratios using locally available ingredients in the SCC mixture was examined.
Abstract: The performance requirements for structural components are becoming more sophisticated and varied in recent years. Self-compacting concrete (SCC) is a highly flowable mixture that can placed without vibrations in structural elements with congested reinforcing. The development of SCC must achieve an appropriate balance between deformability and stability. Additionally, stability is influenced by the material properties and mix proportions, necessitating the development of a technique for SCC mixture design. However, techniques for mix design and testing are continually evolving. Mix design criteria primarily concern the type and quantity of constituents in the SSC mixture. The dose adjustment of the water to cement ratio is a critical property in proportioning SCC mixes. This research aims to examine the influence of different water to cement ratios (0.32, 0.34, and 0.36) with other consistent ratios using locally available ingredients in the SCC mixture. Also, in this study several fresh properties of SCC was examined in according with the European Federation of National Associations Representing for Concrete (EFNARC). Moreover, this study presents the findings and discussion of an experiment conducted to test the influence of water to cement ratios on fresh, and mechanical properties of SCC at 7, 14, 28 days of curing. The findings of the tests for fresh SCC properties in range of the standard limit. The strength properties were improved in the lower water to cement ratio. The increased in the water to cement ratio shows decreased in the strength properties. In addition, the ratio of water to cement affects the properties of the hardened material, while a higher water-to-cement percentage leads to an increase in flow, which may be attributed to the use of superplasticizer. .
References
More filters
TL;DR: In this article, a factorial design was carried out to mathematically model the influence of five key parameters on filling and passing abilities, segregation and compressive strength, which are important for the successful development of medium strength self-compacting concrete incorporating PFA.
251 citations
Book•
02 Apr 2008
TL;DR: In this paper, the authors define the key properties that make fresh concrete self-compacting and outline test methods for its assessment, and provide practical advice for production of SCC and its use in construction practice.
Abstract: During the last decade, concrete technology has made an enormous advance through the introduction of self-compacting concrete. This application of nanaotechnology in construction provides benefits from the perspective of materials technology and environmental protection and is presenting diverse opportunities to engineers and architects alike.
Good quality concrete is compacted, traditionally by vibration. This book defines the key properties that make fresh concrete self-compacting and outlines test methods for its assessment. It covers the basic principles and underlying scientific theory, practical advice for production of SCC and its use in construction practice, and is illustrated by practical case studies and applications. All stages of the self-compacting concrete construction process are reviewed, from selection of materials, mix design and mixing process to transport, placing and finishing.
Significant completed projects are described which illustrate the potential benefits and key aspects of the new self-compacting concrete technology in practice.
Self-Compacting Concrete will be essential reading for practising/consulting engineers and other construction professionals, including some architects, supervisory, management and site staff of medium to large contractors and concrete producers. Postgraduates and advanced undergraduates in civil and structural engineering, construction materials, particularly concrete technology, researchers in these disciplines, research and trade organisations will all find this book of great value and practical use.
157 citations
TL;DR: In this paper, the preparation technology of high-strength self-compacting concrete (SCC) containing ultrapulverized fly ash (UPFA) and superplasticizer (SP) was presented.
136 citations
01 Jan 2003
TL;DR: In this paper, the authors discuss the potential for structural applications in the U.S. and the needs for research and development to make SCC technology available to the bridge engineers, and discuss the applications of SCC in Japan and Europe.
Abstract: Japan has used self-compacting concrete (SCC) in bridge, building and tunnel construction since the early 1990’s. In the last five years, a number of SCC bridges have been constructed in Europe. In the United States, the application of SCC in highway bridge construction is very limited at this time. However, the U.S. precast concrete industry is beginning to apply the technology to architectural concrete. SCC has high potential for wider structural applications in highway bridge construction. This paper covers the applications of SCC in Japan and Europe. It discusses the potential for structural applications in the U.S. and the needs for research and development to make SCC technology available to the bridge engineers.
120 citations
TL;DR: In this article, a proposed mix design method for SCC utilizing different properties of coarse aggregate is presented, which is conducted in three phases, i.e. paste, mortar and concrete to facilitate the mix design process.
53 citations