Characterization and properties of blended cement matrices containing activated bamboo leaf wastes


Autoria(s): Frias, Moises; Savastano, Holmer; Villar, Ernesto; Isabel Sanchez de Rojas, M.; Santos, Sergio
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

01/10/2013

01/10/2013

01/10/2012

Resumo

The worldwide production of bamboo generates large volumes of leaf wastes, which are deposited in landfills or burned in an uncontrolled manner, with negative effects in the environment. The ash obtained by calcining of the bamboo leaf waste, shows good qualities as supplementary cementing material for the production of blended cements. The current paper shows a detailed scientific study of a Brazilian bamboo leaf ash (BLA) calcined at 600 degrees C in small scale condition, by using different techniques (XRF, XRD, SEM/EDX, FT-IR, TG/DTG) and technical study in order. to analyse the behaviour of this ash in blended cements elaborated with 10% and 20% by mass of BLA. The results stated that this ash shows a very high pozzolanic activity, with a reaction rate constant K of the order of 10(-1)/h and type I CSH gel was the main hydrated phase obtained from pozzolanic reaction. The BLA blended cements (10% and 20%) complied with the physical and mechanical requirements of the existing European standards. (c) 2012 Elsevier Ltd. All rights reserved.

Identificador

CEMENT & CONCRETE COMPOSITES, OXFORD, v. 34, n. 9, pp. 1019-1023, OCT, 2012

0958-9465

http://www.producao.usp.br/handle/BDPI/33873

10.1016/j.cemconcomp.2012.05.005

http://dx.doi.org/10.1016/j.cemconcomp.2012.05.005

Idioma(s)

eng

Publicador

ELSEVIER SCI LTD

OXFORD

Relação

Cement and Concrete Composites

Direitos

restrictedAccess

Copyright ELSEVIER SCI LTD

Palavras-Chave #BAMBOO LEAF ASH #POZZOLANIC ACTIVITY #REACTION KINETICS #BLENDED CEMENT #TECHNICAL PROPERTIES #SUGAR-CANE STRAW #KINETIC-DIFFUSIVE MODEL #POZZOLANIC REACTION #PORTLAND-CEMENT #CALCINING TEMPERATURE #REACTION-PRODUCTS #ASH #HYDRATION #PARAMETERS #METAKAOLIN #CONSTRUCTION & BUILDING TECHNOLOGY #MATERIALS SCIENCE, COMPOSITES
Tipo

article

original article

publishedVersion