磁水作为高强度混凝土减水剂潜在用途的试验研究

Experimental Investigation on the Potential Use of Magnetic Water as a Water Reducing Agent in High Strength Concrete.

作者信息

Ramalingam Malathy, Narayanan Karuppasamy, Sivamani Jagan, Kathirvel Parthiban, Murali Gunasekaran, Vatin Nikolai Ivanovich

机构信息

Department of Civil Engineering, Sona College of Technology, Salem 636 005, India.

School of Civil Engineering, SASTRA Deemed University, Thanjavur 613 401, India.

出版信息

Materials (Basel). 2022 Jul 28;15(15):5219. doi: 10.3390/ma15155219.

DOI:10.3390/ma15155219

PMID:35955156

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9369918/

Abstract

High-strength concrete is designed for a self-weight reduction structure and exhibits higher resistance to compressive loads. This paper proposes a novel technique to enhance concrete's properties using Magnetic Field Treated Water (MFTW), describing the results of experimental studies to apprehend the fresh, hardened and microstructural behavior of concrete prepared with Magnetic Water (MW) using a permanent magnet with a field intensity of 0.9 Tesla. The novel scheme focuses on utilizing MW as a water-reducing agent instead of SP to improve the workability of fresh concrete with a 0.38 w/c ratio for achieving M40 grade concrete. Results show a 12% improvement in compressive strength and an 8.9% improvement in split tensile strength compared to normal water (NW) with 1% SP. At 30% cement volume reduction, Magnetic Water Concrete (MWC) performs better than Normal Water Concrete (NWC). Microstructure examination shows that a smaller Calcium Hydrate (CH) crystal is formed with MW and its mineral composition is observed through Energy Dispersive X-ray Analysis (EDAX).

摘要

高强度混凝土是为减轻自重结构而设计的，并且对压缩载荷表现出更高的抵抗力。本文提出了一种使用磁场处理水（MFTW）来增强混凝土性能的新技术，描述了实验研究的结果，以了解使用场强为0.9特斯拉的永磁体制备的磁水（MW）混凝土的新拌、硬化和微观结构行为。该新方案侧重于利用磁水作为减水剂而非高效减水剂（SP），以改善水灰比为0.38的新拌混凝土的工作性，从而实现M40级混凝土。结果表明，与添加1%高效减水剂的普通水（NW）相比，抗压强度提高了12%，劈裂抗拉强度提高了8.9%。在水泥用量减少30%时，磁水混凝土（MWC）的性能优于普通水混凝土（NWC）。微观结构检查表明，磁水形成的氢氧化钙（CH）晶体较小，并通过能量色散X射线分析（EDAX）观察其矿物成分。