Abstract
The effect of sodium lignosulfonate (NaLS) on the flow properties of cement paste was studied using a coaxial cylinder rheometer. The apparent viscosity, ηa, shows a rapid increase with time, due to the hydration of C3A(3CaO·Al2O3) and C4AF(4CaO·Al2O3·Fe2O3). At the initial stage of hydration, the fluidity of paste decreases at first with NaLS concentration and shows a minimum at 0.1%. The further additions of NaLS lead to an increase in the fluidity. When the hydration proceeds, NaLS does not cause a significant change of fluidity. It is considered that NaLS has a strong effect on the initial hydration process.
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Schedule a callMore From: Nihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan)
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