Self-Compacting Concrete

Okamura, Hajime; Ouchi, Masahiro

doi:10.3151/jact.1.5

Cited by 1,309 publications

(512 citation statements)

References 7 publications

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“…It can fill all voids with no segregation, excessive bleeding and air migration air-popping, or other separation of materials, and without the need for vibration or other mechanical consolidation [1]. In early 1990's, SCC technology had been developed in Japan.…”

Section: Introductionmentioning

confidence: 99%

“…In early 1990's, SCC technology had been developed in Japan. Currently, this concrete has gained extensive use in many countries including Malaysia for different applications and structural configuration [1,2]. It is agreed that SCC enhanced concrete stability and involves the effect of different mixture variables to certify satisfactory fresh properties and excellent mechanical properties especially compressive strength [2].…”

Section: Introductionmentioning

confidence: 99%

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Fresh Properties and Flexural Strength of Self-Compacting Concrete Integrating Coal Bottom Ash

Jamaluddin

Hamzah

Ibrahim

et al. 2016

MATEC Web of Conferences

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Abstract. This paper presents the effect of using coal bottom ash as a partial replacement of fine aggregates in self-compacting concrete (SCC) on its fresh properties and flexural strength. A comparison between SCC with various replacements of fine aggregates with coal bottom ash showed that SCC obtained flexural strength decrease on increase of water cement ratio from 0.35 to 0.45. The natural sand was replaced with coal bottom ash up to 30% volumetrically. The fresh properties were investigated by slump flow, T500 spread time, L-box test and sieve segregation resistance in order to evaluate its self-compatibility by compared to control samples embed with natural sand. The results revealed that the flowability and passing ability of SCC mixtures are decreased with higher content of coal bottom ash replacement. The results also showed that the flexural strength is affected by the presence of coal bottom ash in the concrete. In addition, the water cement ratios are influence significantly with higher binder content in concrete.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fresh Properties and Flexural Strength of Self-Compacting Concrete Integrating Coal Bottom Ash

Jamaluddin

Hamzah

Ibrahim

et al. 2016

MATEC Web of Conferences

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“…Na composição granular do concreto observamse vazios entre os agregados graúdos (OKAMURA; OUCHI, 2003). Devido a essa falta de material, ocorre a colisão entre os agregados, gerando o atrito.…”

Section: Propriedadesunclassified

“…A argamassa também gera uma propriedade, que se chama transferência de tensão (OKAMURA; OUCHI, 2003). A tensão normal dos agregados é transferida para a argamassa e consequentemente, amortizada.…”

Section: Propriedadesunclassified

Verificação da existência de propriedades autoadensáveis em concretos de alto desempenho, através de ensaios experimentais.

Fenato¹,

Carbonari

Leite

et al. 2007

Semina: Tech. Ex.

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ResumoO concreto auto adensável (CAA) é caracterizado pela capacidade de fluir pelo interior da fôrma e preenche-la unicamente pela força da gravidade, com coesão e viscosidade adequadas, de forma que não ocorra a segregação. Uma característica é a presença de finos (os quais conferem a coesão necessária) e de grãos com diâmetro máximo de 20 mm. Este trabalho apresenta alguns procedimentos e métodos experimentais que possibilitam a avaliação de propriedades de autoadensabilidade em concretos de alto desempenho, visto que o concreto em estudo possui grãos menores que 20 mm e em sua massa, há a presença de finos (pó-de-brita, sílica ativa e cinza volante), fatores que definem as propriedades auto adensáveis. Primeiramente, foi realizada uma revisão bibliográfica acerca do tema e posteriormente, foram fabricados os equipamentos para realização dos ensaios, a fim de se verificar as propriedades relativas à autoadensabilidade: coesão, viscosidade e segregação. Para o trabalho, foram produzidos dois concretos, ambos produzidos com Cimento Portland ARI , areia grossa, brita 0, pó-de-brita, superplastificante a base de cadeias de éter-carboxilatos, mas diferenciaram-se um do outro pela presença de adição mineral, sílica ativa ou cinza volante. A partir dos resultados obtidos, foi verificado se os concretos de alto desempenho produzidos possuíam características de autoadensabilidade e, neste caso, os dois foram positivos. Também foi analisado o comportamento desses concretos no estado endurecido, através da resistência à compressão. A verificação desses parâmetros quantitativos indica se o material em estudo pode ser empregado como auto adensável, conseguindo o desempenho esperado desse tipo de concreto. O CAA possui uma série de vantagens, como, por exemplo: a redução de mão-de-obra; a não utilização de vibrador e o preenchimento de fôrmas com elevada densidade de armadura ou de geometria complexa. Palavras-chave: Concreto autoadensável. Concretos especiais. Superplastificantes. Adições minerais. AbstractThe self compacting concrete is characterized by its capacity to flow inside the formwork filling it exclusively by the force of the gravity with adequate cohesion and viscosity in such a way that segregation does not occur. One of its characteristic is the presence of fines which provide the necessary cohesion, 1 Engenheiro Civil. Plaenge Empreendimentos.

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“…In 1986, Self Compacting Concrete (SCC) was introduced by Okamura as a solution for producing durable self-leveling concrete, which can flow and be compacted by its own weight into every corner of the formwork during placing and without requiring the vibrating process for normal vibrated concrete [2].…”

Section: Introductionmentioning

confidence: 99%

A Preliminary Modified Volumetric Mix Design for Self-Compacting Concrete (SCC) by Utilizing Asphalt Dust Waste (ADW)

Ismail

Shahidan

2017

MATEC Web Conf.

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Abstract. The construction of asphalt roads has been commonly used as for infrastructure development since ancient times. The production of asphalt using drum mix plants has created powder waste in the premix batching plant industry. It consists of very fine powders and causesproblems to the environment today. However, powder waste can be successfully and economically utilized in the development of selfcompacting concrete (SCC). The aim of this study is to evaluate the fresh properties and the compressive strength of SCC containing asphalt dust waste (ADW). For this purpose, a simple modified volumetric mix design approach based on the Okumura Method was adapted to produce SCC mixes. In order to obtain this SCC, a series of SCC mixes with a specific water/binder ratio (0.3), superplasticizer ratio (2%) as well as different amounts of aggregate, sand and ADW were prepared. Fresh properties of the SCC mix were tested using tests such as slump-flow, J-Ring, L-box and V-funnel which showed satisfactory results for MD8 40 and MD8 50 . The compressive strength for MD8 40 and MD8 50 after 28 days was 40.8 MPa and 34.7 MPa respectively. In conclusion, the simple modified volumetric mix design method by utilizing ADW in SCC can be suggested for the development of SCC.

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Self-Compacting Concrete

Cited by 1,309 publications

References 7 publications

Fresh Properties and Flexural Strength of Self-Compacting Concrete Integrating Coal Bottom Ash

Fresh Properties and Flexural Strength of Self-Compacting Concrete Integrating Coal Bottom Ash

Verificação da existência de propriedades autoadensáveis em concretos de alto desempenho, através de ensaios experimentais.

A Preliminary Modified Volumetric Mix Design for Self-Compacting Concrete (SCC) by Utilizing Asphalt Dust Waste (ADW)

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