USING PNIPAM HYDROGEL PARTICLES TO CONTROL WORKABILITY AND SHRINKAGE IN CEMENT PASTE

Dr. Nia, Kande and Prof. Kwame, Adjei and Dr. Amina, El-Sayed and Prof. Thabo, Mokoena (2024) USING PNIPAM HYDROGEL PARTICLES TO CONTROL WORKABILITY AND SHRINKAGE IN CEMENT PASTE. Journal of Engineering, Mechanics and Modern Architecture, 3 (7). pp. 46-54. ISSN 2181-4384

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Abstract

Cement paste, a fundamental component of concrete, faces significant challenges related to workability and shrinkage, impacting its performance and durability in construction applications. This study explores the innovative use of poly (N-isopropylacrylamide) (PNIPAM) hydrogel particles, renowned for their thermo-responsive properties, to enhance the workability and mitigate shrinkage in cement paste. PNIPAM hydrogels exhibit a unique phase transition behavior at a specific Lower Critical Solution Temperature (LCST), allowing them to alter their volume and water retention characteristics in response to temperature changes. The research delves into the chemical properties and synthesis of PNIPAM hydrogels, detailing methods to optimize their performance in cement paste. Experimental evaluations include a series of workability tests—such as flow table, slump, and rheological measurements—and shrinkage assessments covering plastic, drying, and autogenous shrinkage. Results indicate that incorporating PNIPAM hydrogels significantly improves the fluidity and mixing characteristics of cement paste, thereby enhancing workability. Additionally, the hydrogels effectively reduce various types of shrinkage, contributing to greater structural integrity and durability. The practical implications of this study are profound, suggesting that PNIPAM hydrogels can offer substantial benefits in concrete applications, including precast elements and high-performance concrete. This approach not only addresses common performance issues but also supports sustainable construction practices by reducing the need for frequent repairs and replacements. The study concludes with recommendations for further research into optimizing hydrogel formulations and exploring their integration with emerging construction technologies.

Item Type:	Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Postgraduate > Master's of Islamic Education
Depositing User:	Journal Editor
Date Deposited:	15 Aug 2024 04:34
Last Modified:	15 Aug 2024 04:34
URI:	http://eprints.umsida.ac.id/id/eprint/13938

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