Title

Dynamical Properties of Environmental High-Performance Composites with Calcined Clay

Abstract

Concrete structures may be exposed to dynamic loadings within short periods such as earthquakes and vehicles load, resulting in substantial damage to human life and property because of the collapse of concrete structures. The research achievements on dynamic properties of high-performance composites with LC3 (HPC-LC3) are limited, although dynamic loadings are commonly encountered in infrastructure. The study aims to develop a new-green concrete product (HPC-LC3) with high dynamical properties and promote its mass use in a vibration service environment by investigating dynamical properties of HPC-LC3. Dynamical properties of structure can be promoted at material level by means of enhancing the inherent ability of cement-matrix materials to passively absorb the vibrational energy. Dynamic properties of traditional HPC may be improved by incorporated LC3 because of excellent mechanical properties. The fiber pull-out, thermogravimetric analysis (TGA), (nuclear magnetic resonance) NMR, and microstructure test were used to reveal the enhanced mechanism of dynamic properties in the HPC with LC3 (HPC-LC3), and the economic efficiency of HPC is also evaluated to promote its mass application. The results indicate that the dynamic properties of HPC-LC3 increased by 47% in damping capacity, 102% in storage modulus, 16% in energy dissipation, in comparison with the reference (HPC-OPC). Meanwhile, compared with the reference, the compressive and flexural strengths of LC3-50 increased by 14% and 27%. TGA and NMR results indicate that LC3-50 shows better hydration characteristics, longer alumina-silicate chain length (from 3.9 to 8) than HPC-OPC. The proposed composites reduced embodied energy, embedded CO2 emissions, and costs of HPC by up to 33%, 45%, and 7%, respectively. Thus, the green product (HPC-LC3) with 30%-40% calcined clay, high dynamic properties and more sustainable, will be recommended to mass use in a vibration service environment.

Department(s)

Civil, Architectural and Environmental Engineering

Comments

The authors gratefully acknowledge the financial support provided by the Science and Technology Project of Shenzhen, China (No. JCYJ20190808151011502 and No. JCYJ20180305124844894), the National Natural Science Foundations of China, NSFC-Shandong Joint Fund (No. U2006223), and the Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering (SZU) (No. 2020B1212060074), as well as Advanced Construction and Material Laboratory (ACML) and Center for Infrastructure Engineering Studies (CIES) at Missouri University of Science and Technology.

Keywords and Phrases

Calcined clay; Dynamic property; Ecological benefit; High-performance composite; Limestone calcined clay cement; Microstructure

International Standard Serial Number (ISSN)

0959-6526

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2022 Elsevier, All rights reserved.

Publication Date

10 Feb 2022

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