Journal Published Online: 10 January 2022
Volume 50, Issue 3

Testing and Modeling the Gradually Applying Compressive Stress to Measuring the Strain of Self-Compacted Cement Paste Using Vipulanandan p-q Model

CODEN: JTEVAB

Abstract

This study tested and quantified the stress-strain behavior, elastic modulus, and toughness of self-compacted cement paste. The characteristics of self-compacted flowable cement paste modified with two types of polymer up to 0.06 % (dry weight of cement) were investigated. Stress-strain behavior of modified cement with polymer was investigated for different curing times 1, 3, 7, and 28 days. Adding polymers improved the flowability of cement by 7 to 26 %, but it decreased the water/cement ratio (w/c) from 0.5 to 0.29, depending on the polymeric structure and its content. The nonlinear Vipulanandan p-q equation was tested to predict the stress-strain relationship of the modified cement with polymers and was compared with the β model. When 0.06 % polymers were added to cement, the compressive strength increased by 107 to 257 %. According to polymer types, curing age (t), w/c, and polymer content, the initial elastic modulus (E) of cement also increased by 23 to 240 % with additional polymers. Based on the statistical evaluation tools, the Vipulanandan p-q model predicted the stress-strain relationships better than β model. Linear and nonlinear relationships were used to predict the compressive strength, modulus of elasticity, and toughness of the cement paste as a function of w/c, curing time, and polymer contents.

Author Information

Mahmood, Wael
Department of Civil Engineering, Komar University of Science and Technology, Kurdistan-Region, Iraq
Salih Mohammed, Ahmed
American University of Iraq, Sulaimani, Kurdistan, Iraq
Asteris, Panagiotis G.
Computational Mechanics Laboratory, School of Pedagogical and Technological Education, Athens, Greece
Ahmed, Hawreen
Department of Highway and Bridge Engineering, Technical Engineering College, Erbil Polytechnic University, Erbil, Iraq
Pages: 18
Price: $25.00
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Details
Stock #: JTE20210219
ISSN: 0090-3973
DOI: 10.1520/JTE20210219