The effect that different pozzolanic activity methods has on the kinetic constants of the pozzolanic reaction in sugar cane straw-clay ash/lime systems: Application of a kinetic–diffusive model

2005 ◽  
Vol 35 (11) ◽  
pp. 2137-2142 ◽  
Author(s):  
Moisés Frías ◽  
E. Villar-Cociña ◽  
M.I. Sánchez de Rojas ◽  
E. Valencia-Morales
Keyword(s):  
Sugar Cane ◽  
Pozzolanic Reaction ◽  
Pozzolanic Activity ◽  
Kinetic Constants ◽  
Diffusive Model

scholarly journals Quantitative Comparison of Binary Mix of Agro-Industrial Pozzolanic Additions for Elaborating Ternary Cements: Kinetic Parameters

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2944
Author(s):  
Ernesto Villar-Cociña ◽  
Moisés Frías ◽  
Holmer Savastano ◽  
Loic Rodier ◽  
María Isabel Sánchez de Rojas ◽  
...  
Keyword(s):  
Kinetic Parameters ◽  
Sugar Cane ◽  
Research Work ◽  
Pozzolanic Reaction ◽  
Reaction Rate Constant ◽  
Pozzolanic Activity ◽  
Binary Blend ◽  
Activation Free Energy ◽  
Pozzolanic Reactivity ◽  
Bamboo Leaf Ash

In this research work, the quantitative characterization of a binary blend comprised of two pozzolans (sugar cane straw (SCSA)–sugar cane bagasse ashes (SCBA), bamboo leaf ash (BLAsh)–SCBA and paper sludge (PS)–fly ash (FA)) taking into account the calculated values of the kinetic parameters of the reaction in the pozzolan/calcium hydroxide system is shown. The paper shows the most significant and important results obtained by the authors in the quantitative assessment (calculation of kinetic parameters) of the pozzolanic reaction of different mixtures of pozzolanic materials that are residues from agriculture or industrial processes. This allows a direct and rigorous comparison of the pozzolanic activity of the binary combinations of materials. The values of the kinetic parameters (reaction rate constant or activation free energy) constitute a very precise quantitative index of the pozzolanic activity of the binary combinations of materials, which is very useful for its employment in the elaboration of ternary cements. This paper shows that the binary blends 1SCBA60Blash40, 1SCBA50Blash50, 1SCBA70Blash30 have a very high pozzolanic reactivity followed by PSLSFA, 2SCBA50SCSA50, PSISFA and SCWI.

Assessing the pozzolanic activity of cements with added sugar cane straw ash by synchrotron X-ray diffraction and Rietveld analysis

2015 ◽  
Vol 98 ◽  
pp. 44-50 ◽  
Author(s):  
Guilherme A. Calligaris ◽  
Margareth K.K.D. Franco ◽  
Laurence P. Aldrige ◽  
Michelle S. Rodrigues ◽  
Antônio Ludovico Beraldo ◽  
...  
Keyword(s):  
Sugar Cane ◽  
Rietveld Analysis ◽  
Pozzolanic Activity ◽  
X Ray Diffraction ◽  
Added Sugar ◽  
X Ray ◽  
Straw Ash

scholarly journals Characterization of Sugar Cane Bagasse Ash: A Comparison to Densified Silica Fume and Fly Ash

2021 ◽  
Vol 9 (3) ◽  
pp. 88-93
Author(s):  
Asma A. Hussein
Keyword(s):  
Chemical Composition ◽  
Sugar Cane ◽  
Pozzolanic Reaction ◽  
Sugar Cane Bagasse ◽  
Hardened Concrete ◽  
Pozzolanic Material ◽  
Concrete Properties ◽  
Negative Impacts ◽  
Sugar Cane Bagasse Ash

In this study the Sugar cane bagasse ash (SCBA) was characterized for chemical composition, morphological and mineralogical properties. From XRF analysis it was found that the SCBA has SiO2, Al2O3, Fe2O3 and CaO content of 67.25%, 6.37%, 4.21% and 13% respectively and it has a very low LOI value of 0.34% and can be classified as Class F ASTM pozzolan according to ASTM C 618-2009. SCBA can be used as a pozzolanic material after grinding to less than 45 Micron. Based on the properties obtained from the characterization in this study it can be concluded that, utilization of SCBA in concrete will positively affect hardened concrete properties due to pozzolanic reaction, cementing properties and filling effect of SCBA. Moreover it will minimize the negative impacts associated with SCBA disposal.  

The Effect of the Calcination Temperature on the Physical, Chemical and Mineralogical Characteristics of Sugar Cane Bagasse Ash (SCBA) for Use As Pozzolan

2021 ◽  
Vol 47 (3) ◽  
pp. 546-556
Author(s):  
Tiago Assunção Santos ◽  
Raquel Arraes Argolo ◽  
Daniel Véras Ribeiro
Keyword(s):  
Calcination Temperature ◽  
Sugar Cane ◽  
Sugar Cane Bagasse ◽  
Pozzolanic Activity ◽  
Infrared Spectrometry ◽  
X Ray ◽  
Physical Chemical ◽  
Mineralogical Characteristics ◽  
Washing Process ◽  
Sugar Cane Bagasse Ash

Statement of Novelty: This study analyzes the influence of the washing process and the calcination temperature on the morphological, physical, chemical and mineralogical characteristics of SCBA. The objective of the present study is to evaluate the morphological, physical, chemical and mineralogical characteristics of sugar cane bagasse ash (SCBA). The ashes were obtained by calcination of sugarcane bagasse (SCB), a waste product generated by the sugar and alcohol industry, at temperatures of 500°C, 600° C and 700°C, and the influence of this calcination on the pozzolanic activity of SCBA. The techniques used to characterize these ashes include helium gas picnometry, sedigraphy, scanning electron microscopy (SEM), X-ray fluorescence (XRF), X-ray diffractometry (XRD) and Fourier transform infrared spectrometry (FTIR). The evaluation of the pozzolanicity of these ashes was carried according to chemical titration method as proposed by Fratini, modified Chapelle method and finally using the pozzolanic activity index (PAI) with cement. The results showed that the SCBA presented high pozzolanicity, regardless of the calcination temperature.

Effect of Calcination Temperature on Pozzolanic Reaction of Calcined Shale Mortar

2012 ◽  
Vol 174-177 ◽  
pp. 843-846 ◽  
Author(s):  
An Cheng ◽  
Sao Jeng Chao ◽  
Wei Ting Lin
Keyword(s):  
Chemical Composition ◽  
Water Absorption ◽  
Calcination Temperature ◽  
Ultrasonic Wave ◽  
Wave Velocity ◽  
Activity Index ◽  
Setting Time ◽  
Pozzolanic Reaction ◽  
Pozzolanic Activity ◽  
Ultrasonic Wave Velocity

This study investigated the influence of calcination temperature on the pozzolanic activity of shale. Calcination temperatures of 500 °C, 600 °C, 700 °C, 800 °C, and 900 °C were used. The calcined shale powder was then passed through a No.200 sieve before being used to replace 20% of the cement in standard mortar samples. X-ray fluorescence spectrometery (XRF) was used to analyze the chemical composition of the calcined shale. In addition, the effects of replacing mortar with calcined shale were also examined with regard to setting time, pozzolanic activity, compressive strength, ultrasonic wave velocity, and the water absorption of the mortar. The test results demonstrate that the chemical composition of SiO2+Al2O3+Fe2O3 exceeded the 70% required by ASTM C618 specifications. The strength activity index (SAI) of calcined shale at 7, 28, 56 days exceeded 75%. At 28 days, the SAI values of samples produced with shale calcined at 700 °C and 800 °C exceeded 99%. After 28 days, the SAI, water absorption, and ultrasonic wave velocity values were nearly identical to those of control samples produced using only cement. Among all shale samples, those calcined at temperatures between 700 and 800 °C demonstrated the highest pozzolanic activity.

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