Effect of false set related anomalies on rheological properties of cement paste mixtures in the presence of high range water reducing admixture

Abstract

There are many studies related to the fresh state properties of the cementitious systems in the literature. However, there is no specific study about the effects of false set formation on fresh state properties of these systems. In this study, the effect of false set formation on fresh state and rheological properties of the cement paste mixtures containing high range water reducing (HRWR) admixture was investigated experimentally. For this aim, two different commercial CEMI 42.5 R. type cements produced by different companies were used. In order to investigate the effect of false set formation related anomalies on fresh state properties, paste mixtures were prepared with different mixing times. In the mixtures where false set related anomaly was the case, rheological properties were positively affected by prolonging the mixing time.

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

“…(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).…”

Water Reducer: A Highly Dispersing Binder for High‐Performance Lithium‐Sulfur Batteries†

“…Water‐reducer is a kind of surfactant, and is mainly used to decrease the water‐cementitious content of concretes to increase their strength in previous reports. [ 24‐25 ] Various water‐reducers have been developed, such as sodium lignosulfonate, [ 26 ] naphthalene sulfonate, [ 27 ] formaldehyde polymers. [ 25,28 ] Water‐reducer type polymers have massive polar groups, but meanwhile, they also demonstrate a highly dispersing effect to ensure the well dispersion of non‐polar particles during mixing process.…”