Taguchi approach for optimization of the bleeding on cement-based grouts

Tan, Özcan; Zaimoğlu, Ahmet Şahin; Hınıslıoğlu, Sinan; Altun, Selim

doi:10.1016/j.tust.2004.08.004

Cited by 90 publications

(36 citation statements)

References 8 publications

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“…Several trial batches were performed in order to optimize rheological and mechanical properties. As far as water-to-binder ratio (W/B) is concerned, according to the relevant literature on grouting applications [18,[21][22][23][24][25][26][27][28][29], two different values were decided in prior to be retained for all soilcrete samples: a lower one, equal to 0.4 and a higher one, equal to 1.0. Hence, two series of six soilcrete samples at a time were obtained, one with W/B = 0.4 and another with W/B = 1.0.…”

Section: Soilcrete Preparation and Propertiesmentioning

confidence: 99%

Mechanical properties of soilcrete mixtures modified with metakaolin

Kolovos

Asteris

Cotsovos

et al. 2013

Construction and Building Materials

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Section: Soilcrete Preparation and Propertiesmentioning

confidence: 99%

Mechanical properties of soilcrete mixtures modified with metakaolin

Kolovos

Asteris

Cotsovos

et al. 2013

Construction and Building Materials

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“…Due to the many problems associated with its use, an unstable grout is undesirable in most cement grouting operations [7,23,26,30]. Currently, the methods of determining the stability of a grout (bleed test, API filter press, etc.)…”

Section: Filtrationmentioning

confidence: 99%

Transferring innovative research into practical wisdom: the case of permeation grouting

Mohtar

Yoon

Sangroya

et al. 2017

Innov. Infrastruct. Solut.

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For decades, permeation grouting has been used as a cost-effective low disturbance ground improvement technology that allowed geotechnical engineers to help strengthening the soils and provide proper control of water flow. While permeation grouting can be a very useful solution, the design of an appropriate grouting program can be the difference between a successful job and an expensive on-the-go repair. However, current grout design relies heavily on rules of thumb and outdated charts. The geotechnical investigation is rarely targeted towards grouting design and the final grouting decisions are made based on index measurements such as fines content or soil classification at most. The collective ''past experience'' is more commonly used for final grouting design than any other geotechnical design despite that flow of grouts through porous media is a very complex phenomenon owing to the diversity of possible flow stoppage mechanisms involved. For some cases, rheological blocking occurs due to viscous grouts; however, in most cases, permeation is controlled by filtration. Despite the complexity of the science behind permeation grouting, practitioners often reference in situ heterogeneity and variability to dismiss the need for a more systematic design approach. However, heterogeneity and variability never stopped geotechnical engineers from performing proper design based on measured engineering properties of the soil and this should be the case for grouting as well. Particularly, with all the recent advances to grouting materials and its accompanying additives, grouting is now possible with more concentrated suspensions (lower w/c ratios) and the grouts are more ''flowable'' than ever before. These advances are making most of existing charts and common rules of thumb obsolete and therefore, it is the optimal time to implement recent advances in grouting research into common practice. Recent research on the topic highlights the complexities of grouting and the potential for implementing advanced laboratory testing to properly characterize the grouts and design it for field specific in situ conditions and desired final improved properties. This paper discusses these limitations in practice, advances in research and provides a case study where these advances were implemented to design a site-specific grout.

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“…Según el método de Taguchi, es posible que el experimento que corresponde a las condiciones óptimas no se realice durante las pruebas. En estos casos, puede calcularse el intervalo de confianza (IC) para el nivel de error elegido a partir de la Ecuación [4]. siendo m el promedio global del valor del rendimiento en las condiciones óptimas, C i el efecto fijo de la combinación factor-nivel utilizado en la prueba y e i el error aleatorio de cada prueba.…”

Section: Materialesunclassified

“…Tan y Zaimoglu (3) han investigado la influencia en los tiempos de fraguado de las lechadas de cemento de la incorporación de las CV, el HS y la B. En ese trabajo, observaron que los tiempos de fraguado inicial y final disminuyeron al aumentar el HS y la B. Al investigar los efectos de los aditivos en la exudación de las lechadas de cemento, Tan et al (4) …”

Section: Introductionunclassified

Optimización de la resistencia a compresión de lechadas de cemento reforzadas con aditivos

Tan¹,

Zaimoğlu²

2007

Mater. construcc.

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RESUMENEn el presente trabajo se ha intentado optimizar, mediante el método de Taguchi, las resistencias a compresión (a las edades de 7, 14 y 28 días) de lechadas de cemento reforzadas con bentonita, cenizas volantes y humo de sílice. Se diseñaron los experimentos de acuerdo con un arreglo ortogonal tipo L 16 en el que se contemplaban tres factores: la bentonita (0, 0,5, 1 y 3%), las cenizas volantes (10, 20, 30 y 40%) y el humo de sílice (0, 5, 10 y 20%) (porcentajes en peso del sóli-do). Los datos obtenidos se analizaron con mediante ANOVA y el método de Taguchi. De acuerdo con los resultados experimentales, el contenido tanto de cenizas volantes como de humo de sílice desempeña un papel significativo en la resistencia a compresión. Por otra parte, las condiciones óptimas que se han identificado son: 0% bentonita, 10% cenizas volantes, 20% humo de sílice y 28 días de tiempo de curado. La resistencia a compresión máxima conseguida en las anteriores condiciones era de 17,1 MPa.Palabras clave: lechada de cemento, bentonita, cenizas volantes, humo de sílice, método de Taguchi. SUMMARYThe Taguchi method was used in this study to optimize the unconfined (7-, 14-and 28-day) compressive strength of cement-based grouts with bentonite, fly ash and silica fume admixtures. The experiments were designed using an L 16 orthogonal array in which the three factors considered were bentonite (0%, 0.5%, 1.0% and 3%), fly ash (10%, 20%, 30% and 40%) and silica fume (0%, 5%, 10% and 20%) content. The experimental results, which were analyzed by ANOVA and the Taguchi method, showed that fly ash and silica fume content play a significant role in unconfined compressive strength. The optimum conditions were found to be: 0% bentonite, 10% fly ash, 20% silica fume and 28 days of curing time. The maximum unconfined compressive strength reached under the above optimum conditions was 17.1 MPa.Key yw wor rds: cement based grouts, bentonite, fly ash, silica fume, taguchi method.

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Taguchi approach for optimization of the bleeding on cement-based grouts

Cited by 90 publications

References 8 publications

Mechanical properties of soilcrete mixtures modified with metakaolin

Mechanical properties of soilcrete mixtures modified with metakaolin

Transferring innovative research into practical wisdom: the case of permeation grouting

Optimización de la resistencia a compresión de lechadas de cemento reforzadas con aditivos

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