Influence of Mechanical Grinding on the Pozzolanic Activity of Residual Sugarcane Bagasse Ash

Title: Influence of Mechanical Grinding on the Pozzolanic Activity of Residual Sugarcane Bagasse Ash
Author(s): Cordeiro
Paper category : conference
Book title: International RILEM Conference on the Use of Recycled Materials in Building and Structures
Editor(s): E. Vázquez, Ch. F. Hendriks and G.M.T. Janssen
Print-ISBN: 2-912143-52-7
e-ISBN: 2912143756
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 731 - 740
Total Pages: 10
Nb references: 18
Language: English

Abstract: Since the beginning of the 20 th century sugarcane bagasse has been used as fuel in the
boilers of the sugar factory. In 2003 approximately 95% of the sugarcane bagasse produced in
Brazil was burned to generate energy resulting in about two million tons of residual ash. Due
to the presence of amorphous silica in its chemical composition, this waste of the sugar
industry can be used as a mineral admixture in cement paste, mortar and concrete. In order to
enhance the pozzolanic activity of this residual ash it is necessary, however, to increase the
fineness of the material. In this study mechanical grinding has been used to improve the
pozzolanic activity of the sugarcane bagasse ash. The results of the study of the influence of
grinding time on the sugarcane bagasse residual ash reactivity are presented. Its influence on
particle size, specific surface (Blaine), scanning electronic microscopy, pozzolanic activity
index, and energy consumption during grinding was analyzed so that the potential of the
sugarcane bagasse ash use as a mineral admixture to pastes, mortars and concretes could be
assessed. The Bond grindability test of the residual ash was performed and the work index
determined at a test size of 325 mesh (45 µm). The results demonstrate that the pozzolanic
activity of the residual sugarcane bagasse ash can be significantly increased by mechanical
grinding in a vibratory mill.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.081

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