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水泥中速凝剂类型和成分对矿渣掺合水泥水化热及凝结时间的影响

The Influence of the Acceleration Admixture Type and Composition of Cement on Hydration Heat and Setting Time of Slag Blended Cement.

作者信息

Pizoń Jan, Łaźniewska-Piekarczyk Beata, Miera Patrycja

机构信息

Faculty of Civil Engineering, Silesian University of Technology, 44-100 Gliwice, Poland.

出版信息

Materials (Basel). 2022 Apr 11;15(8):2797. doi: 10.3390/ma15082797.

DOI:10.3390/ma15082797
PMID:35454490
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9025169/
Abstract

This article presents recent research on cements containing GGBFS and their modifications with accelerating admixtures. The initial setting time and hydration heat evolution results are presented for cement CEM II/B-S and CEM III/A manufactured with three Portland clinkers of various phase compositions. The research was carried out at 8 °C and 20 °C. The main objective is to assess the behavior of blended cements in cooperation with modern admixtures that contain nucleation seeds. The authors aimed to compare and evaluate different methods to reduce setting time, namely, the effects of temperature, the specific surface area of cement and GGBFS, the type of Portland clinker, the content of GGBFS, and presence of accelerators. Many of these aspects appear in separate studies, and the authors wanted a more comprehensive coverage of the subject. Those methods of reducing the setting time can be ranked: the most effective is to increase the temperature of the ingredients and the surroundings, the second is to reduce the GGBFS content in cement, and the use of accelerators, and the least effective is the additional milling of Portland clinker. However, of these methods, only the use of accelerators is acceptable in terms of sustainability. Prospective research is a detailed study on the amounts of C-S-H phase and portlandite to determine the hydration rate.

摘要

本文介绍了含粒化高炉矿渣粉（GGBFS）水泥及其用促凝外加剂改性的最新研究。给出了用三种不同相组成的波特兰熟料生产的CEM II/B-S水泥和CEM III/A水泥的初凝时间和水化热释放结果。研究在8℃和20℃下进行。主要目的是评估混合水泥与含晶核的现代外加剂配合使用时的性能。作者旨在比较和评估不同的缩短凝结时间的方法，即温度、水泥和GGBFS的比表面积、波特兰熟料类型、GGBFS含量以及促凝剂的存在所产生的影响。其中许多方面在单独的研究中出现过，作者希望对该主题有更全面的涵盖。那些缩短凝结时间的方法可按如下排序：最有效的是提高原料和环境温度，其次是降低水泥中的GGBFS含量以及使用促凝剂，最无效的是对波特兰熟料进行额外粉磨。然而，在这些方法中，就可持续性而言，只有使用促凝剂是可接受的。前瞻性研究是对C-S-H相和氢氧化钙的量进行详细研究以确定水化速率。

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