Title:
Rate of Hydration of Lignocellulosic Fiber-Reinforced Hydrated Cement
Author(s):
Sutapa Deb, Nilanjan Mitra, Subhasish Basu Majumdar, and Debasis Roy
Publication:
Materials Journal
Volume:
117
Issue:
6
Appears on pages(s):
177-186
Keywords:
cellulose; hydration rate; jute fiber; lignin; ordinary portland cement hydration; ramie fiber
DOI:
10.14359/51726994
Date:
11/1/2020
Abstract:
Does addition of lignocellulosic fibers alter the rate of hydration of fiber-reinforced cementitious composites? This question is being probed in this paper through a series of tests involving thermal analysis, Fourier transform infrared (FTIR) spectra, and X-ray diffraction (XRD) investigations along with standard setting time tests. It could be observed that retardation of hydration rate can be achieved with addition of increasing percentage of fibers (irrespective of the source: jute or ramie). It is also observed that treated jute has more hydration rate retardation capability in comparison to that of treated ramie. The probable reason for this effect is that the amorphous part of cellulose (obtained more in treated jute in comparison to that of treated ramie) attaches to the Ca2+ ions (thereby decreasing the amount of Ca(OH)2 released in fiber-reinforced cement paste) in the calcium silicate hydrate (CSH) gel to result in this retardation effect.