Exploring the Impact of Cement Additives on Strength and Durability
The general chemical structure of MHEC is presented in Fig. 2. According to supplier information, the sample employed in the study exhibited a degree of substitution relative to methylation (DS value) of 1.81, and a molar degree of substitution relative to hydroxyethylation (MS) of 0.15. Gel permeation chromatography (GPC) analysis produced molar masses of 2.48·105 g/mol (Mw) and of 1.74·105 g/mol (Mn), respectively (Table 2). Using the GPC method, a hydrodynamic radius Rh(z) of 31.0 nm and a