Utilization of copolymer based on poly (vinyl alcohol) and 2-ethylhexyl acrylate as admixture for cement pastes

El‐Sayed Negim, Lyazzat Bekbayeva, A. N. Nabiyeva, Gulzhakhan Yeligbayeva, Eshmaiel Ganjian

2019

Full text Open access: Gold Metadata (CSL-JSON)
DOI 10.26577/ijbch-2019-1-i24
Data confidence 85 high
How this score is calculated

It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.

Abstract

Utilization of copolymer based on poly (vinyl alcohol) and 2-ethylhexyl acrylate as admixture for cement pastes Abstract: In this study, three composition ratios of [polyvinyl alcohol (PVA)-2-ethylhexyl acrylate (2-EHA)] were prepared by grafting polymerization techniques in aqueous solution using ammonium persulfate as free radical initiator.The ratio of PVA/2-EHA in the grafted copolymers was variable: 1/ 8, 1/ 6 and 1/ 4, respectively.The obtained grafted copolymers were characterized by different techniques including FTIR, 1 H NMR, TGA and DSC.The copolymers were mixed with cement to study the physicomechanical properties of cement pastes including W/C ratios, setting time, workability, water absorption as well as compressive strength were investigated.The results showed that the addition of grafted copolymers to cement pastes affected the physicomechanical properties.As the content of 2-EHA in the grafted copolymers increased, the water of consistency decreased, whereas the setting times (initial & final) were shortened.The compressive strength of the cement pastes was increased at all ages of hydration while water absorption decreased with increasing 2-EHA.