Statistical evaluation of concrete quality∗∗Aïtcin, P.C., Mindess S., Sustainability of Concrete, ISBN 978-0-415-57196-8, SPON PRESS.

Aïtcin, P-C

doi:10.1016/b978-0-08-100693-1.15003-9

Cited by 29 publications

(33 citation statements)

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“…Eventually, concrete produced using limestone and basalt aggregates provides a stronger bonding in transition zone between coarse aggregate and cement paste. Several studies in the literature support the findings of this study related to variations in mechanical properties [7,8,[12][13][14].…”

Section: B-39supporting

confidence: 72%

Dependence of Impact Resistance of Steel Fiber Reinforced Concrete on Aggregate Origin

2015

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In this study, the effect of aggregate origin on impact resistance of steel fiber reinforced concrete was investigated. Using gravel-sized limestone, basalt and natural aggregates of 20 mm of maximum size, normal and steel fiber reinforced concretes were produced. Water/cement ratio and cement dosage of concrete mixtures were 0.5 and 400 kg/m 3 , respectively. It should be noted that superplasticizer and steel fibers were used in concrete production. Hooked-end bundled steel fibers with l/d ratio of 65 and 1.0% fiber volume were used. After 28 days standard curing, compressive strength, split tensile strength and ultrasonic pulse velocity tests were performed on 150 × 150 × 150 mm 3 cube specimens. Additionally, impact resistances of concrete specimens were determined using impact test apparatus described in ACI Committee 544. Φ150 × 300 mm 3 cylinders were prepared for impact resistance tests. After 28 days curing, these specimens were cut into Φ150 × 64 mm 3 dimension. Impact resistance tests were performed on these specimens. Experimental results were evaluated in terms of steel fiber presence and aggregate origin.

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Section: B-39supporting

confidence: 72%

Dependence of Impact Resistance of Steel Fiber Reinforced Concrete on Aggregate Origin

2015

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“…Many possible mix proportions may lead to similar desired compressive strength [8]. In this case, if experimental results from various studies were combined in a database, further analyses can be conducted in order to choose the most suitable mix proportion.…”

Section: Introductionmentioning

confidence: 99%

A Fuzzy ART-Based Approach for Estimation of High Performance Concrete Mix Proportion

Chiew

Chai

et al. 2014

Neural Information Processing

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Abstract. Mix design of high performance concrete (HPC) is a complicated procedure as the mixtures usually consist of many possible combinations. Conventionally, numerous laboratory works are required. In this paper, the use of Fuzzy Adaptive Resonance Theory (ART) in estimating HPC mix proportion from experimental data is proposed. The proposed Fuzzy ART-based approach attempts to search for a set of suitable mix proportions which is near to a desired compressive strength, and deduce a mix proportion. Such approach is useful as experimental data is subjected to experimental errors or even potentially outliers. The applicability of the proposed approach is demonstrated with a set of benchmark data. This paper contributes to a new methodology for estimating the mix proportion of HPC.

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“…Estima-se que aproximadamente 90% do dióxido de carbono gerado na fabricação do cimento Portland (CP) ocorrem durante a produção do clínquer [1] e que, para cada tonelada de CP produzida, é extraída 1,15 tonelada de calcário e despejada na atmosfera 1tonelada de CO 2 [2].…”

Section: Introductionunclassified

A influência da composição química e da finura no desempenho de cimentos álcali ativados obtidos com escórias de alto forno

et al. 2017

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RESUMO A busca por aglomerantes de menor impacto ambiental, relacionado principalmente à emissão de CO2, tem crescido na última década, em especial, por aqueles isentos de clínquer. Cimentos álcali ativados (CAT's) são obtidos através da mistura de materiais sílico-cálcico-aluminosos com um ativador alcalino e, portanto, podem reduzir em até 80% a emissão de CO2 quando comparados com o Cimento Portland (CP). Pesquisas recentes têm mostrado que CAT's podem apresentar propriedades físicas e mecânicas equivalentes ou superiores àquelas apresentadas pelo CP, entretanto, a ativação da matéria prima é complexa, pois depende das suas características. Trabalhos recentes têm mostrado a forte influência das características da matéria-prima no desempenho do CAT, porém, pouco mencionada na literatura. Assim, este estudo teve como objetivo avaliar a influência das características da escória de alto forno, finura e composição química, no comportamento dos CAT's, visando contribuir no entendimento dos seus mecanismos de hidratação. Para tanto, foram empregadas duas escórias, A e B, as quais foram submetidas a diferentes tempos de moagem e, ativadas com 5% de NaOH. Foram confeccionadas argamassas e pastas para testes de resistência à compressão (7 e 28 dias), monitoramento do calor de hidratação e investigação da microestrutura (DRX e DSC). Os resultados mostraram que as argamassas confeccionadas com escória A obtiveram ótimo desempenho mecânico, com valores próximos a 48MPa aos 28 dias, bastante superior à escória B, independente da finura e com maior formação de CSH. A hipótese provável desse estudo é que o sistema formado no CAT com escória A, por apresentar maior teor de Al2O3, poderia propiciar a formação de CSH com maior incorporação de Al e menor cristalinidade, contribuindo na resistência mecânica.

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Statistical evaluation of concrete quality∗∗Aïtcin, P.C., Mindess S., Sustainability of Concrete, ISBN 978-0-415-57196-8, SPON PRESS.

Cited by 29 publications

References 0 publications

Dependence of Impact Resistance of Steel Fiber Reinforced Concrete on Aggregate Origin

Dependence of Impact Resistance of Steel Fiber Reinforced Concrete on Aggregate Origin

A Fuzzy ART-Based Approach for Estimation of High Performance Concrete Mix Proportion

A influência da composição química e da finura no desempenho de cimentos álcali ativados obtidos com escórias de alto forno

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