Work

Investigation on the mechanical and durability performance of high-strength concrete utilizing high molarity internal curing compounds

Year: 2025

Type: article

Abstract: Maintaining adequate early-age moisture is essential for achieving the desired strength and durability of concrete, particularly in harsh environments such as hot climates or deep foundation structures. This study explores the effectiveness of internal curing (IC) using polyethylene glycols (PEG 4000 and PEG 6000) of different molecular weights to improve the long-term performance of high-strength concrete. Concrete mixes incorporating PEG at 0.5–2.0% by binder weight were systematically compared with conventionally cured, spray-cured, and uncured specimens through comprehensive physical, mechanical, durability, and microstructural assessments. Results revealed that IC with PEG 6000 exhibited superior performance compared to PEG 4000, with optimal dosages of 1.0 and 1.5%, respectively, achieving or exceeding conventional curing outcomes. IC specimens demonstrated denser microstructures and reduced shrinkage. Although large-scale structural effects were beyond this study’s scope, IC concrete offers notable environmental and economic advantages by reducing water use and external curing demands, ensuring durable performance in demanding conditions.

Source: Journal of Sustainable Cement-Based Materials

DOI: 10.1080/21650373.2025.2593560

Authors: Kastro Kiran V, Liberato Ferrara, Dhanya Sathyan

Institutions: Amrita Vishwa Vidyapeetham, Politecnico di Milano

Language: English

Topic: Concrete Properties and Behavior

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: green

Funder: Amrita Vishwa Vidyapeetham University