Influence of triethanolamine on the hydration and the strength development of cementitious systems-Reference-Cited by-同舟云学术

Influence of triethanolamine on the hydration and the strength development of cementitious systems

Published:2013-09 Issue:18 Volume:65 Page:1101-1109
ISSN:0024-9831
Container-title:Magazine of Concrete Research
language:en
Short-container-title:Magazine of Concrete Research

Author:

Kong Xiang-Ming¹,Lu Zhen-Bao²,Liu Hui³,Wang Dong-Min⁴

Affiliation:

1. Associate Professor, Key Laboratory of Civil Engineering Safety and Durability, China Education Ministry Department of Civil Engineering, Tsinghua University, Beijing, China

2. Master Researcher, Beijing Building Construction Research Institute Co. Ltd, Beijing, China

3. Postgraduate Researcher, Department of Chemical Engineering, China University of Mining & Technology, Beijing, China

4. Professor, Department of Chemical Engineering, China University of Mining & Technology, Beijing, China

Abstract

The influence of triethanolamine (TEA) at varying dosages on the strength development of pure cement (PC) and fly ash cement (FAC) pastes was systematically investigated. Techniques including mercury intrusion porosimetry, X-ray diffraction, thermogravimetric analysis and scanning electron microscopy were employed to characterise the microstructure of hardened cement pastes and to monitor the cement hydration process with the aim of correlating strength variations with microstructural changes caused by TEA addition. The results showed that 0·03–0·10% addition of TEA visibly enhances the early strength but decreases the compressive strength after 3 d for PC pastes. A high dosage of TEA (1%) leads to a sharp decrease in 28-d strength for both PC and FAC pastes. Mechanistic explanations regarding why TEA affects the strength development differently at different dosages and ages are discussed by considering the impacts of TEA on the hydration degree, pore structure, composition and morphology of hydration products.

Publisher

Thomas Telford Ltd.

Subject

General Materials Science,Building and Construction,Civil and Structural Engineering

Link

https://www.icevirtuallibrary.com/doi/pdf/10.1680/macr.13.00015

Reference17 articles.

1. Effect of some admixtures on the setting time and strength evolution of cement pastes at early ages

2. Impact of admixtures on the hydration kinetics of Portland cement

3. Morphology and microstructure of hydrating Portland cement and its constituents IV. Changes in hydration of A C3S, C3S, C3A, C4AF and gypsum paste with and without the admixtures triethanolamine and calcium lignosulphonate

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