Physical and pozzolanic action of mineral additions on the mechanical strength of high-performance concrete

Isaia, Geraldo Cechella; Gastaldini, A.L.G.; Moraes, Rafael R.

doi:10.1016/s0958-9465(01)00057-9

Cited by 396 publications

(198 citation statements)

References 2 publications

Supporting

Mentioning

171

Contrasting

Unclassified

Order By: Relevance

“…FA (Kazim 2012). This is due to higher efficiency of SF as pozzolana, formation of additional C-S-H gel at early age, better particle packaging and strengthening of interfacial zone (Isaia et al 2003;Thanongsak et al 2010). …”

Section: Compressive Strength Of Concrete Using Ternary Blend Cementmentioning

confidence: 99%

“…Addition of silica fume increases early strength of concrete by formation of secondary C-S-H gel at early stages due to fast pozzolanic reaction. The synergic effect of these materials in ternary blend cement system enhances mechanical properties as well as makes the resultant concrete durable (Mullick 2007;Kumar and Kaushik 2003;Radlinski and Olek 2012;Isaia et al 2003). Ternary blend of SF and FA reduces the requirement of dose of superplasticizer for the same workability with respect to OPC concrete and concrete using binary blend of silica fume (Mullick 2007;Goyal et al 2008) and hence reduces cost.…”

Section: Introductionmentioning

confidence: 99%

“…Considerable researches (Radlinski and Olek 2012;Isaia et al 2003;Goyal et al 2008;Hariharan et al 2011;Thomas et al 1999;Bouzoubaâ et al 2002) have been carried out to investigate the effect of replacement of 20 to 30 % of OPC with FA and SF but higher replacement level of OPC in ternary blend cement system is still needed to investigate intensively. The addition of silica fume with fly ash was found to increase the compressive strength of concrete at early age and improve chloride ion permeability, when compared to concrete made with fly ash alone (Mullick 2007;Hariharan et al 2011;Thomas et al 1999).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Relative Levels of Mineral Admixtures on Strength of Concrete with Ternary Cement Blend

Mala

Mullick

Jain

et al. 2013

Int J Concr Struct Mater

View full text Add to dashboard Cite

In the present scenario to fulfill the demands of sustainable construction, concrete made with multi-blended cement system of OPC and different mineral admixtures, is the judicious choice for the construction industry. Silica fume (SF) and fly ash (FA) are the most commonly used mineral admixtures in ternary blend cement systems. Synergy between the contributions of both on the mechanical properties of the concrete is an important factor. This study reports the effect of replacement of OPC by fly ash (20, 30, 40 and 50 % replacement of OPC) and/or silica fume (7 and 10 %) on the mechanical properties of concrete like compressive strength and split tensile strength, with three different w/b ratio of 0.3, 0.4 and 0.45. The results indicate that, as the total replacement level of OPC in concrete using ternary blend of OPC ? FA ? SF increases, the strength with respect to control mix increases up to certain replacement level and thereafter decreases. If the cement content of control mixes at each w/b ratio is kept constant, then as w/b ratio decreases, higher percentage of OPC can be replaced with FA ? SF to get 28 days strength comparable to the control mix. A new method was proposed to find the efficiency factor of SF and FA individually in ternary blend cement system, based on principle of modified Bolomey's equation for predicting compressive strength of concrete using binary blend cement system. Efficiency factor for SF and FA were always higher in ternary blend cement system than their respective binary blend cement system. Split tensile strength of concrete using binary and ternary cement system were higher than OPC for a given compressive strength level.

show abstract

Section: Compressive Strength Of Concrete Using Ternary Blend Cementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Relative Levels of Mineral Admixtures on Strength of Concrete with Ternary Cement Blend

Mala

Mullick

Jain

et al. 2013

Int J Concr Struct Mater

View full text Add to dashboard Cite

show abstract

“…Cement consumes 5.5 GJ of energy and releases approximately 1 ton of CO 2 per t of clinker, corresponding to between 5 and 8% of the total CO 2 emitted annually into the atmosphere [2]. Mineral additions are often employed to reduce the environmental impact of cements.…”

Section: Introductionmentioning

confidence: 99%

Effect of partial replacement with thermally processed sugar cane bagasse on the properties of mortars

et al. 2017

View full text Add to dashboard Cite

Sugar cane bagasse is a residue of the sugar-alcohol industry, and its main destination is represented by burning boilers for power generation. The bagasse cogeneration of power produces a sugar cane bagasse ash (SCBA) residue that does not have a useful destination. Ashes are commonly studied as pozzolan in Portland cement production. International Standards indicate the use of pozzolan with up to 50% substitution. In the present work, we investigate the use of SCBA as an addition in Portland cement. For this purpose, Portland cement was prepared by substituting cement with 0, 10, 20, and 30% processed SCBA in volume. The ashes were processed by re-burning and grinding and were then characterized by scanning electron microscopy, Xray diffraction, laser granulometry, X-ray fluorescence spectrometry, the Chapelle method, and pozollanic activity. To evaluate the cement with substitution, we used the mortar recommended by NBR 7215. The mechanical properties of the cements with replacement were analysed through tests of the compressive strength and flexural strength of mortars. The results appear interesting and support the possible use of SCBA in the production of cement from the aspect of mechanical properties evaluated.

show abstract

“…Con el transcurso de la hidratación y la reacción de la adición se produce una matriz más densa y homogénea. Complementariamente, se reduce el efecto pared en la zona de transición entre la matriz y el agregado, densificando la microestructura y aumentando las propiedades mecánicas y durables del hormigón [3]. En general, la escoria que usualmente se emplea tiene una superficie específica Blaine de 350 a 500 m 2 /kg, en consecuencia presenta hasta los 3 días una muy baja contribución con la resistencia; alguna contribución entre los 3 y 14 días y una contribución considerablemente mayor a edades posteriores [4].…”

Section: Introductionunclassified

Influencia de la temperatura de curado: hidratación y resistencia de pastas de cemento con escoria

2010

View full text Add to dashboard Cite

RESUMENActualmente son muy conocidos los beneficios tecnológicos, económicos y el menor impacto medioambiental que produce el empleo de adiciones minerales como reemplazo del cemento portland. Estas razones, han consolidado el uso de muchas adiciones como: escoria granulada de alto horno, ceniza volante, material calcáreo, humo de sílice, etc.En los últimos años, los cementos presentan un importante aumento en el contenido de las adiciones; el cual influye sobre la distribución de partículas, sobre la velocidad y naturaleza de las reacciones de hidratación y en consecuencia en su ganancia de resistencia.El presente trabajo evalúa la influencia de la temperatura en el curado (20, 40 y 60 ºC) de pastas con contenido variable de escoria granulada de alto horno (0 a 80 %) elaboradas con relación agua/material cementante de 0,40, sobre la resistencia mecánica. La evolución de la hidratación se estudió a través del análisis de los compuestos de hidratación por DRX y el contenido de agua no evaporable. La resistencia mecánica se evaluó empleando un diseño de experimentos central compuesto centrado.Los resultados obtenidos indican que a medida que la temperatura de curado aumenta con el incremento del contenido de escoria en el cemento mezcla, se aumentan la resistencia y el contenido de agua no evaporable, y disminuye la cantidad de hidróxido de calcio de la pasta.Palabras clave: Cemento portland, escoria granulada de alto horno, resistencia mecánica, DRX, agua no evaporable, activación térmica. Influence of curing temperature: hydration and strength of cement paste with granulated blast furnace ABSTRACTNowadays it is well known that using blast furnace slag as partial replacements for Portland cement adds technological, economic and environmental benefits. Those are some of the reasons why cements containing several additions (blast furnace slag, fly ash, calcareous material, etc) are commonly used.In recent years, blended cements started to increase amounts of additions as replacement of Portland cement; in this regard these variations influence the rate and the mechanism of hydration and, consequently, strength development.The present work evaluated the effect of different curing temperatures (20, 40 and 60 ºC) on the mechanical strength of cement paste with different proportions of granulated blast-furnace slag (0 to 80 %). Pastes were prepared with water/cementitious material ratio (w/cm) equal to 0,4.The hydration evolution was determinated following the hydration products using XRD analysis and evaluated the content of non evaporable water. Mechanical strength was evaluated trough central composite experimental design.When granulated blast-furnace slag content increases with curing temperature, the results show that mechanical strength and non evaporable water increases, while the calcium hydroxide content decreases.

show abstract

Physical and pozzolanic action of mineral additions on the mechanical strength of high-performance concrete

Cited by 396 publications

References 2 publications

Effect of Relative Levels of Mineral Admixtures on Strength of Concrete with Ternary Cement Blend

Effect of Relative Levels of Mineral Admixtures on Strength of Concrete with Ternary Cement Blend

Effect of partial replacement with thermally processed sugar cane bagasse on the properties of mortars

Influencia de la temperatura de curado: hidratación y resistencia de pastas de cemento con escoria

Contact Info

Product

Resources

About