Pumice powder as filler of self-compacting concrete

Granata, Michele Fabio

doi:10.1016/j.conbuildmat.2015.08.040

Cited by 62 publications

(21 citation statements)

References 14 publications

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“…This means that when the replacement rate of GPP is 20%, the largest enhancement in the pozzolanicity occurs at 28 days. These results reported by the authors are consistent with this study. The SAI values proved that pumice possess great potential for pozzolanic activity in terms of SAI because they have high contents of silicon dioxide and aluminum oxide.…”

Section: Resultssupporting

confidence: 94%

High temperature effect on the mechanical behavior of steel fiber reinforced self‐compacting concrete containing ground pumice powder

Karataş

Dener

Benli

et al. 2019

Structural Concrete

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This study reports the results of high temperature effects on the properties of steel fiber reinforced self-compacting concrete (SFRSCC) fabricated by replacing cement with ground pumice powder (GPP) as mineral additive at different substitution rates. The mixtures had the same amounts of steel fiber and the binding material with constant water to binder (w/b) ratio of 0.37. In this context, five SFRSCC series were prepared by replacing Portland cement (PC) with 5, 10, 15, and 20% of GPP including the control mix. Sixty cube samples with a dimension of 150 × 150 × 150 mm were fabricated and exposed to curing aged 3, 7, 28, and 90 days to conduct compressive strength tests and a total of 100 × 100 × 350 mm 18 beam samples cured at 28 days were fabricated to perform the flexural strength tests. Durability tests were performed on the 18 cube samples of 100 × 100 × 100 mm subjected to water curing at 28 days. In addition, the relation between the compressive strength and Ultrasonic Pulse Velocity (UPV) of SFRSCC samples was compared aged 1, 3, 14, and 28 days. Samples of SFRSCC were subjected to the temperatures of 200, 400, 600, and 800 C after being cured at 28 days then cooled to room temperature before conducting tests. The results revealed that the compressive strength of all SFRSCC mixes enhanced at 200 C by 5.34 and 3.55% for control and GPP10 mixes respectively. The strength loss of mixes incorporating GPP is about 60% at 800 C. K E Y W O R D Scompressive strength, elevated temperature, ground pumice powder, steel fiber reinforced selfcompacting concrete, UPV

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Section: Resultssupporting

confidence: 94%

High temperature effect on the mechanical behavior of steel fiber reinforced self‐compacting concrete containing ground pumice powder

Karataş

Dener

Benli

et al. 2019

Structural Concrete

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“…El CAC al compararse con el concreto tradicional vibrado presenta varias ventajas como son la eliminación del vibrado, disminución del tiempo de construcción, reducción de la contaminación acústica, mejor capacidad de llenado de estructuras altamente reforzadas, disminución de la permeabilidad y mejor interfaz entre la pasta de cemento y agregado o pasta de cemento y refuerzo, también permite una mayor libertad de diseño de las obras [5][6][7]. Por estas características, el CAC ha sido considerado una de las grandes innovaciones en la industria de la construcción [8], y su empleo es cada vez más común en proyectos de infraestructura, debido a calidad y estética que se aprecia en los acabados y en la arquitectura [9].…”

Section: -Introducciónunclassified

Concreto autocompactante con materiales cementicios suplementarios de Colombia

Urrego

Delvasto

2018

Libro De Comunicaciones / Livro Das Comunicações

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RESUMENEl concreto autocompactante (CAC) es un tipo de hormigón o concreto especial, que por sus características reológicas es considerado uno de los grandes desarrollos tecnológicos en la industria del concreto, con un consumo creciente en la industria de la construcción. Este artículo contiene resultados de investigaciones realizadas por el Grupo Materiales Compuestos (GMC) sobre el CAC empleando diferentes adiciones disponibles en Colombia. Se han estudiado adiciones de subproductos industriales como la ceniza volante (FA), escoria de carbón (E), lodo calcáreo (LC) y residuos de mampostería (RM) proveniente de los residuos construcción y demolición (RCD), y otros materiales como las puzolanas naturales o rellenos como la caliza molida (LP), material volcánico del Puracé (MVP) y material volcánico de Tolima (MVT). Estos materiales se incorporaron en la preparación de concretos autocompactantes para su posterior evaluación reológica en estado fresco y caracterización en estado endurecido. El acondicionamiento reológico se evaluó mediante técnicas como el embudo en V, caja en L y flujo de asentamiento con cono de Abrams. Adicionalmente se evaluaron propiedades mecánicas como la resistencia a la compresión y la tracción indirecta. Para ello se analizaron el comportamiento de un total de 23 mezclas de CAC con 7 adiciones distintas donde los flujos de asentamiento presentaron diámetros dentro de un rango de 520 mm -750 mm, los tiempos en la prueba de fluidez en el embudo en V estuvieron en un rango entre 4 y 20 segundos, y los resultados en la relación de bloqueo (H2/H1) de las diferentes mezclas usando la caja en L estuvieron en un rango entre 0,68 y 1. La resistencia a la compresión de la mezcla con mayor resistencia, 43,4 MPa a los 28 días de curado bajo agua, la reportó un CAC con 35% de FA (CAC 65_FA-35) seguida de la mezcla de CAC con 20% de escoria (CAC 80_E-20) con 41,3 MPa. Se concluyó que los materiales investigados sí tienen potencial para ser adicionados en los CAC y obtener propiedades adecuadas en las mezclas, tanto en estado fresco como endurecido. PALABRAS CLAVES:Concreto autocompactante, reología, puzolanas, residuos de construcción y demolición, cenizas volantes, harina calcárea. 505

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“…The methods of manufacturing of SCC initially had high content of paste; later on, researches were made to reduce the paste content and achieve strength [5,6]. Due to the high content of water and voids, it has become important to look into the workability and segregation behavior of SCC [7,8]. The important property of a SCC is to have workable and segregation resistant concrete which can flow through the reinforcement without any external vibrations or compactions [9].…”

Section: Introductionmentioning

confidence: 99%

An Investigation on Self-Compacting Concrete Using Ultrafine Natural Steatite Powder as Replacement to Cement

Kumar¹,

Sudalaimani²,

Shanmugasundaram³

2017

Advances in Materials Science and Engineering

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An experimental investigation was made on flow properties and compressive strength of self-compacting concrete (SCC) with ultrafine natural steatite powder (UFNSP) as replacement to cement. The tests were conducted on specimens with 5%, 10%, 15%, 20%, and 25% of replacement of UFNSP to the weight of cement and compared to the control specimens. The flow properties of all specimens were tested and checked for their limit with the existing guidelines. The compressive strength test was done on all specimens for strength of 7 days, 14 days, 28 days, and 56 days. The hardened samples were tested for their microstructural behavior and the elements Mg, Ca, and Si were mapped. Through mapping, the formations of M-S-H along with C-S-H are observed. The results show that the addition of UFNSP influences the flow property, by reducing the flow, and increases the compressive strength till 20% replacement. Further the addition of UFNSP increases the denseness of microstructure of the specimens thus resulting in the strength increment.

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Pumice powder as filler of self-compacting concrete

Cited by 62 publications

References 14 publications

High temperature effect on the mechanical behavior of steel fiber reinforced self‐compacting concrete containing ground pumice powder

High temperature effect on the mechanical behavior of steel fiber reinforced self‐compacting concrete containing ground pumice powder

Concreto autocompactante con materiales cementicios suplementarios de Colombia

An Investigation on Self-Compacting Concrete Using Ultrafine Natural Steatite Powder as Replacement to Cement

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