Keyword: «cement paste»

In this article, the authors outline the key principles of how various plasticizers function in concrete mixtures and describe the operating mechanism of polycarboxylate‑based plasticizers. The study then presents research findings on the impact of two types of polycarboxylate plasticizers – Linamix PK and Qz LS – on the plasticity kinetics of cement paste with a 15 % reduced water‑to‑cement ratio. Based on the obtained data, graphs were constructed showing the dependence of the penetration depth of the Vicat apparatus needle in the cement paste on time elapsed since the addition of mixing water. It was found that both plasticizers have a similar effect on the cement paste, but the Qz LS plasticizer demonstrates a longer‑lasting plasticizing effect on the cement paste over time.