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Influence of Cellulose Superplasticiser on the Strength Property of Cementitious Materials

Author Affiliations

  • 1 CSIR-Structural Engineering Research Centre, Chennai, INDIA

Res. J. Recent Sci., Volume 2, Issue (ISC-2012), Pages 290-295, February,2 (2013)

Abstract

Functions of newly synthesized cellulose based superplasticiser(SP) on cementitious materials during development of strength have been studied and the results are compared with polycarboxylic ester (PCE) SP added mortar. Marsh cone test is conducted for finalizing the required amount of SP for the mortar mix. Preliminary characterization studies such as X-ray fluorescence (XRF), X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) have been conducted on precursor materials such as Cement, Fly ash (FA), Silicafume (SF) for evaluating the elemental or oxide composition, presence of phases and surface morphology respectively. Quantification of cement and SF have been carried out through the Reitvield quantification software or Total Pattern analysis Software (TOPAS). Compressive strength studies on mortar samples have been conducted for cellulose and PCE SPs added mortar mixes and the results are compared with each other. It is found that, the mix having cement + FA (25%) + SF (10%) + cellulose SP (1.5% ), shows compressive strength higher after 28th days to 60 days, when compared to the mortar mix having cement + FA (25%) + SF (10%) + PCE (2.5%). Hence, it is concluded that, activation of mineral admixtures such as SF and FA has occurred in the presence of cellulose SP, which resulted in strength gain. It is observed that there is no strength reduction by using the cellulose SP and thus it gained the confidence and added advantage to use as SP towards the promotion of mineral admixtures usage for high strength or high performance concrete.

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