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A mild alkali treated jute fibre controlling the hydration behaviour of greener cement paste.

Jo BW, Chakraborty S - Sci Rep (2015)

Bottom Line: To reduce the antagonistic effect of jute fibre on the setting and hydration of jute reinforced cement, modified jute fibre reinforcement would be a unique approach.The present investigation deals with the effectiveness of mild alkali treated (0.5%) jute fibre on the setting and hydration behaviour of cement.Additionally, from the analytical characterizations, it is determined that fibre-cement compatibility is increased and hydration delaying effect is minimized by using alkali treated jute fibre as fibre reinforcement.

View Article: PubMed Central - PubMed

Affiliation: Department of Civil and Environmental engineering, Hanyang University, Seoul, South Korea, 133791.

ABSTRACT
To reduce the antagonistic effect of jute fibre on the setting and hydration of jute reinforced cement, modified jute fibre reinforcement would be a unique approach. The present investigation deals with the effectiveness of mild alkali treated (0.5%) jute fibre on the setting and hydration behaviour of cement. Setting time measurement, hydration test and analytical characterizations of the hardened samples (viz., FTIR, XRD, DSC, TGA, and free lime estimation) were used to evaluate the effect of alkali treated jute fibre. From the hydration test, the time (t) required to reach maximum temperature for the hydration of control cement sample is estimated to be 860 min, whilst the time (t) is measured to be 1040 min for the hydration of a raw jute reinforced cement sample. However, the time (t) is estimated to be 1020 min for the hydration of an alkali treated jute reinforced cement sample. Additionally, from the analytical characterizations, it is determined that fibre-cement compatibility is increased and hydration delaying effect is minimized by using alkali treated jute fibre as fibre reinforcement. Based on the analyses, a model has been proposed to explain the setting and hydration behaviour of alkali treated jute fibre reinforced cement composite.

No MeSH data available.


(a) Temperature vs. time curve and (b) temperature changing rate (dT/dt) vs. time (t) plot of control, raw jute, and alkali treated jute fibre reinforced cement samples.
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f1: (a) Temperature vs. time curve and (b) temperature changing rate (dT/dt) vs. time (t) plot of control, raw jute, and alkali treated jute fibre reinforced cement samples.

Mentions: The temperature vs. time and the rate of temperature change (dT/dt) vs. time (t) plots of control, raw jute, and alkali treated jute fibre reinforced cement samples are shown in Figs. 1(a) and 1(b), respectively. Table 2 represents the characteristic features of the temperature vs. time and rate of temperature change (dT/dt) vs. time (t) plots of the control cement paste, raw jute cement paste and alkali treated jute cement paste (shown in Figs. 1(a) and 1(b)). As indicated in Table 2, the maximum achievable temperature (Tmax) and the time required to reach the maximum temperature (t) are observed to be 24.37°C and 860 min, respectively, for the control cement; the values are estimated to be 24.05°C and 1040 min, respectively, for the raw jute reinforced cement sample. However, the above two values are predicted to be 24.07°C and 1020 min, respectively, for the alkali treated jute reinforced cement sample. It is likely that the hydration of cement is delayed by the addition of raw jute fibre. However, the addition of the alkali treated jute fibre as fibre reinforcement in the cement matrix reduces the delay in the hydration of cement.


A mild alkali treated jute fibre controlling the hydration behaviour of greener cement paste.

Jo BW, Chakraborty S - Sci Rep (2015)

(a) Temperature vs. time curve and (b) temperature changing rate (dT/dt) vs. time (t) plot of control, raw jute, and alkali treated jute fibre reinforced cement samples.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4296306&req=5

f1: (a) Temperature vs. time curve and (b) temperature changing rate (dT/dt) vs. time (t) plot of control, raw jute, and alkali treated jute fibre reinforced cement samples.
Mentions: The temperature vs. time and the rate of temperature change (dT/dt) vs. time (t) plots of control, raw jute, and alkali treated jute fibre reinforced cement samples are shown in Figs. 1(a) and 1(b), respectively. Table 2 represents the characteristic features of the temperature vs. time and rate of temperature change (dT/dt) vs. time (t) plots of the control cement paste, raw jute cement paste and alkali treated jute cement paste (shown in Figs. 1(a) and 1(b)). As indicated in Table 2, the maximum achievable temperature (Tmax) and the time required to reach the maximum temperature (t) are observed to be 24.37°C and 860 min, respectively, for the control cement; the values are estimated to be 24.05°C and 1040 min, respectively, for the raw jute reinforced cement sample. However, the above two values are predicted to be 24.07°C and 1020 min, respectively, for the alkali treated jute reinforced cement sample. It is likely that the hydration of cement is delayed by the addition of raw jute fibre. However, the addition of the alkali treated jute fibre as fibre reinforcement in the cement matrix reduces the delay in the hydration of cement.

Bottom Line: To reduce the antagonistic effect of jute fibre on the setting and hydration of jute reinforced cement, modified jute fibre reinforcement would be a unique approach.The present investigation deals with the effectiveness of mild alkali treated (0.5%) jute fibre on the setting and hydration behaviour of cement.Additionally, from the analytical characterizations, it is determined that fibre-cement compatibility is increased and hydration delaying effect is minimized by using alkali treated jute fibre as fibre reinforcement.

View Article: PubMed Central - PubMed

Affiliation: Department of Civil and Environmental engineering, Hanyang University, Seoul, South Korea, 133791.

ABSTRACT
To reduce the antagonistic effect of jute fibre on the setting and hydration of jute reinforced cement, modified jute fibre reinforcement would be a unique approach. The present investigation deals with the effectiveness of mild alkali treated (0.5%) jute fibre on the setting and hydration behaviour of cement. Setting time measurement, hydration test and analytical characterizations of the hardened samples (viz., FTIR, XRD, DSC, TGA, and free lime estimation) were used to evaluate the effect of alkali treated jute fibre. From the hydration test, the time (t) required to reach maximum temperature for the hydration of control cement sample is estimated to be 860 min, whilst the time (t) is measured to be 1040 min for the hydration of a raw jute reinforced cement sample. However, the time (t) is estimated to be 1020 min for the hydration of an alkali treated jute reinforced cement sample. Additionally, from the analytical characterizations, it is determined that fibre-cement compatibility is increased and hydration delaying effect is minimized by using alkali treated jute fibre as fibre reinforcement. Based on the analyses, a model has been proposed to explain the setting and hydration behaviour of alkali treated jute fibre reinforced cement composite.

No MeSH data available.