Adsorption properties of polycarboxylate ether-based high range water reducing admixture on cementitious systems: A review

Low Carbon Alkali-Activated Slag Binder and Its Interaction with Polycarboxylate Superplasticizer: Importance of Microstructural Design of the PCEs

“…It is commonly acknowledged that superplasticizers derive their dispersion from adsorption on binder particles or early hydrates, such as ettringite, monosulfate, syngenite, portlandite, and gypsum. , As a general rule, as the number of PCE molecules adsorbed on the binder surface increases, so does the flowability, and maximum flowability is reached when the adsorption approaches the plateau (saturation) …”

“…33,34 As a general rule, as the number of PCE molecules adsorbed on the binder surface increases, so does the flowability, and maximum flowability is reached when the adsorption approaches the plateau (saturation). 35 In order to gain more insights into the interaction between the PCE polymers and slag particles, TOC measurement was employed to determine the amount adsorbed for the two PCE series on AAS. Figure 7 presents the amount adsorbed for a series of 7HPEG polymers prepared with different anionic charge densities (molar ratio varied from 3.0:1 to 7.0:1); as expected, all PCE samples produced a typical Langmuir adsorption curve.…”

Investigation of High Range Water-Reducing Admixture Requirement in Cementitious Systems Containing Fly Ash with Different Utilization Ratio and Fineness

“…The electrostatic effect occurs when the carboxylate groups of the HRWRA adhere to the cement surface. (Karakuzu et al, 2021;Ozen et al, 2020a;Yigit et al, 2020;Sahin et al, 2022c;Kalipcilar et al, 2016;Latifi et al, 2022;Sahin et al, 2020). At the same time, polyethylene oxide side chains provide steric hindrance (Altun et al, 2021;Ozen et al, 2021;Sahin & Mardani., 2022d;Mardani-Aghabaglou, 2021a;Ozen et al, 2020b;Ozen et al, 2022b;Mardani-Aghabaglou, 2021b).…”

“…It was declared by various researchers that the need for waterreducing admixtures will increase depending on the increase in the total surface area with the increase in the amount of fine material in the system (Faltin, 2022). However, Mardani et al (2017 and Karakuzu et al (2021) reported that the water-reducing admixture can adsorb more strongly to fine particles. In addition, Burgos et al (2012) stated that the substitution of mineral additive with a higher specific surface area compared to cement causes extra surface formation leading to competition with cement for adsorption of PCE.…”

Determination of Setting Times of Mortar Mixtures Prepared with Cement Having Different C3A Ratios

“…The fresh-properties of cementitious systems depend on many physical and chemical parameters. The rate of hydration and workability of the cementitious system are significantly affected by some factors such as the chemical composition of cement, especially its C 3 A content and fineness as well as the gypsum type and amount added to its clinker during the manufacturing process (Zingg et al, 2009;Karakuzu et al, 2021;Kobya et al, 2022). C 3 A is the most reactive component of cement (Mehta & Monteiro, 2006;Karakuzu et al, 2022).…”