Generalization of Abrams' law

Nagaraj, T. S.; Banu, Zahida

doi:10.1016/0008-8846(96)00065-8

Cited by 72 publications

(21 citation statements)

References 2 publications

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“…A su vez, la cantidad de pasta depende de la finura del cemento, y del tamaño y características superficiales de los áridos. Algunos autores (26)(27) han establecido una relación ári-do/cemento normalizada, es decir, que este parámetro se relativiza con el correspondiente al de una dosificación de hormigón con relación a/c 0,50.…”

Section: Resultsunclassified

Estado fresco de morteros y hormigones con arenas de machaqueo

Cabrera¹,

Traversa²,

Ortega³

2011

Mater. construcc.

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RESUMENEn el presente trabajo se plantea un estudio experimental del estado fresco de morteros y hormigones con arenas de machaqueo, orientado a la evaluación de la incidencia de la forma y textura superficial de los granos del árido fino y del contenido de polvo sobre la reología de las mezclas. El programa experimental comprendió el estudio del estado fresco de hormigones con arenas con partículas angulares, la influencia de este tipo de partícu-las sobre la efectividad de los aditivos químicos y la evaluación de la influencia de las características físicas del árido fino sobre la exudación. Los resultados muestran que el empleo de arenas de machaqueo provoca un comportamiento reológico diferente al de hormigones con arenas naturales, y que el efecto de los aditivos superfluidificantes mejora notablemente este comportamiento.Palabras clave: arena de machaqueo, arena triturada, forma y textura superficial, estado fresco de hormigones. INTRODUCCIÓNDebido al agotamiento de yacimientos de arenas o por las restricciones de origen ecológico, cada vez más será necesario encontrar yacimientos de arenas de partículas SUMMARY This article describes an experimental study conducted on fresh mortars and concretes made with crushed sand. The aim of this research was to assess the effect of aggregate particle shape and surface texture as well as dust content on mortar and concrete rheology. The experimental programme also addressed the impact of angular grains on chemical admixture performance and concrete bleeding. The findings showed that the use of crushed sand induces rheological behaviour that differs from the behaviour observed in natural sand and that superplasticisers can improve this behaviour considerably.

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Section: Resultsunclassified

Estado fresco de morteros y hormigones con arenas de machaqueo

Cabrera¹,

Traversa²,

Ortega³

2011

Mater. construcc.

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“…Also, the research on partially saturated geopolymer mortar is rare. However, Radhakrishna et al (2008) and Radhakrishna et al (2010 have reported that heat-cured geopolymers can be reproportioned by generalized Abrams' (Abram, 1918, p. 20;Nagaraj & Banu, 1996, 1999) and Bolomey's laws (1927). As per the reported research, by using a single input parameter in the model, the b/f ratio for any other desired strength can be calculated using the phenomenological model.…”

Section: Proportioning Of Geopolymersmentioning

confidence: 95%

“…In the case of OPC composites, water-to-cement ratio rules the strength development when other factors are kept constant (Nagaraj & Banu, 1996). In a similar manner, within the range of values of b/f ratio considered in this investigation inverse of f/b ratio of 0.2 (b/f ratio of 5.0) can be considered as a reference for normalization.…”

Section: Development Of Phenomenological Model E Thermal Cured Blocksmentioning

confidence: 98%

Design and properties of fly ash, ground granulated blast furnace slag, silica fume and metakaolin geopolymeric based masonry blocks

Radhakrishna¹

2015

Eco-Efficient Masonry Bricks and Blocks

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“…Also the research on partially saturated geopolymer mortar is rare. However, Radhakrishna et al (2006Radhakrishna et al ( , 2008aRadhakrishna et al ( , b, 2010 have reported that heat-cured geopolymers can be re-proportioned by generalised Abrams' (Nagaraj and Banu 1996;Abrams 1918) and Bolomey's laws (1927). As per the reported research, by using single input parameter in the model, the binder-to-fluid ratio for any other desired strength can be calculated using the phenomenological model.…”

Section: Proportioning Of Geopolymersmentioning

confidence: 99%

Phenomenological Model to Re-proportion the Ambient Cured Geopolymer Compressed Blocks

Radhakrishna¹,

Madhava²,

Manjunath

et al. 2013

Int J Concr Struct Mater

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Geopolymer mortar compressed blocks were prepared using fly ash, ground granulated blast furnace slag, silica fume and metakaolin as binders and sand/quarry dust/pond ash as fine aggregate. Alkaline solution was used to activate the source materials for synthesizing the geopolymer mortar. Fresh mortar was used to obtain the compressed blocks. The strength development with reference to different parameters was studied. The different parameters considered were fineness of fly ash, binder components, type of fine aggregate, molarity of alkaline solution, age of specimen, fluid-to-binder ratio, binder-to-aggregate ratio, degree of saturation, etc. The compressed blocks were tested for compression at different ages. It was observed that some of the blocks attained considerable strength within 24 h under ambient conditions. The cardinal aim was to analyze the experimental data generated to formulate a phenomenological model to arrive at the combinations of the ingredients to produce geopolymer blocks to meet the strength development desired at the specified age. The strength data was analyzed within the framework of generalized Abrams' law. It was interesting to note that the law was applicable to the analysis of strength development of partially saturated compressed blocks when the degree of saturation was maintained constant. The validity of phenomenological model was examined with an independent set of experimental data. The blocks can replace the traditional masonry blocks with many advantages.

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Generalization of Abrams' law

Cited by 72 publications

References 2 publications

Estado fresco de morteros y hormigones con arenas de machaqueo

Estado fresco de morteros y hormigones con arenas de machaqueo

Design and properties of fly ash, ground granulated blast furnace slag, silica fume and metakaolin geopolymeric based masonry blocks

Phenomenological Model to Re-proportion the Ambient Cured Geopolymer Compressed Blocks

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