Thermal curing of fibre-reinforced UHPC

纤维增强 UHPC 的热固化

• 批准号: 230651665
• 负责人: Professorin Dr. Birgit Meng
• 金额: --
• 依托单位: Department of Mechanics, Biomechanics and Mechatronics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/230651665?language=en
• 关键词: Thermal; curing; fibre; reinforced; UHPC

In the frame of the proposed research project the influence of curing on the properties of fibre-reinforced UHPC is to be investigated systematically. Besides the heat treatment at 90°C commonly used today, heat curing and heat-pressure curing (autoclaving) at significantly higher temperatures will be applied. Thus, starting materials, which are less or barely reactive under normal hardening conditions, will be activated considerably, influencing to a great extent the micro structure and consequently the performance of the material. The goal of the investigations is improve the properties of UHPC by controlling the curing conditions (temperature, pressure and duration). In order to attain this goal it is necessary to obtain fundamental knowledge of the formation and the stability of the phases in the heat treated and autoclaved cementitious system. For this purpose the phase assemblage is varied mainly by application of different curing conditions and its influence on the mechanical properties of the UHPC is evaluated considering the fibre bond.

在拟议的研究项目的框架中，应系统地研究固化对纤维增强UHPC特性的影响。除了当今常用的90°C下进行热处理外，还将应用热量固化和热压固化（高压板）在明显较高的温度下。在正常硬化条件下，起始材料将保守地激活，在正常硬化条件下具有较小或几乎没有反应性，从而在很大程度上影响了微结构，并导致材料的性能。通过控制固化条件（温度，压力和持续时间），通过控制UHPC的特性提高了研究的目标。为了实现这一目标，有必要获得有关热处理和高压灭菌水泥系统中阶段的形成和稳定性的基本知识。为此，在考虑到纤维键的情况下，评估了相位组合主要通过应用不同的固化条件而变化。

项目成果

Einflussgrößen auf die Wirksamkeit einer Wärmebehandlung von Ultrahochfestem Beton (UHFB)

影响超高强混凝土（UHFB）热处理效果的因素

• DOI: 10.1002/best.201600059
• 发表时间: 2017
• 期刊: Beton‐ und Stahlbetonbau
• 作者: Selleng;Gröger;Fontana
• 通讯作者: Fontana