Rapid characterization of raw materials for the production of concrete admixtures (Part 2)
Figure: Readymix Industries Israel
Figure: Readymix Industries Israel
Figure: Readymix Industries Israel
Figure: Readymix Industries Israel
Figure: Readymix Industries Israel
Figure: Readymix Industries Israel
Repeatability of the performance of chemical admixtures is a key factor for successful concrete production and placement. This article presents a procedure for the rapid assessment of major raw materials generally used for producing concrete chemical admixtures. Please read here Part 2.
3.5 Naphthalene sulfonate formaldehyde condensates (NSFC)
NSFCs are dispersion agents originating from petroleum processing. Naphthalene molecules are polymerized by a condensation mechanism with formaldehyde using sulfuric acid (H2SO4) as a catalyst to form long hydrocarbon chains [8]. As demonstrated under 2.3, a raw material analysis applying just one analytical method may not cover all possible cases. We thus suggest the determination of NSFC activity using a combination of three different analytical methods:
1. Light absorbance: The correlation between light absorbance 1% NSFC solution (at...
