Effect of Polyvinyl Alcohol on the Rheological Properties of Cement Mortar

Yunqing Xing,Wei Jiang,Baomin Wang,Kunkun Zhang,Fang Liu

doi:10.3390/molecules25030754

Yunqing Xing, Wei Jiang + Show 3 more

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https://doi.org/10.3390/molecules25030754

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Journal: Molecules	Publication Date: Feb 10, 2020
Citations: 23	License type: CC BY 4.0

Affiliation: Dalian University of Technology, Xijing University

Abstract

Polyvinyl alcohol (PVA) is a kind of water-soluble polymer, which has been widely used in different industries due to its excellent mechanical and chemical properties. In this paper, the effects of polyvinyl alcohol with different hydrolysis and polymerization degrees on the rheological properties of cement mortar are studied. The results show that the rheological properties of PVA-modified cement mortar can be described by the modified Bingham model. The yield stress of modified cement mortar is less than that of unmodified mortar when the degree of polymerization and the content of PVA are small. With the increase of polyvinyl alcohol content and polymerization degree, the yield stress and plastic viscosity of modified cement mortar increase sharply, which are larger than those of the unmodified cement mortar. However, the effect of hydrolysis degree of PVA on yield stress and plastic viscosity of modified cement mortar is not obvious.

Highlights

Polyvinyl alcohol (PVA) is a kind of water-soluble polymer, which is widely used in different industries due to its excellent mechanical and chemical properties
The main purpose of this research is to study the effect of PVA on the rheological properties of cement mortar
The main purpose of this research was to study the effect of PVA on the rheological properties of cement mortar

Summary

Introduction

Polyvinyl alcohol (PVA) is a kind of water-soluble polymer, which is widely used in different industries due to its excellent mechanical and chemical properties. Polyvinyl alcohol can be added to cement-based materials in a variety of ways, affecting the properties of cement-based materials. 3%) are added directly to cement-based materials in the form of aqueous solution to improve the properties of cement slurry, mortar, and concrete [3,11,12,13]. The addition of polyvinyl alcohol in aqueous solution to cement-based materials has a great influence on the performance of cement-based materials. Many studies have shown that the addition of a certain amount of polyvinyl alcohol can improve the workability and water retention of cement-based materials in the state of fresh mixing

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