Ecological and Mechanical Properties of Ultra High Performance – Fiber Reinforced Cementitious Composites Containing High Volume Fly Ash
Ecological and Mechanical Properties of Ultra High Performance – Fiber Reinforced Cementitious Composites Containing High Volume Fly Ash
复制标题
超高性能的生态和机械性能——含有大量粉煤灰的纤维增强水泥基复合材料
DOI：
10.1007/978-94-024-1194-2_29
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
A. Fantilli
中科院分区：
文献类型：
--
作者：
T. Nishiwaki;Keita Suzuki;Sukmin Kwon;G. Igarashi;A. Fantilli
超高性能纤维增强水泥基复合材料（UHP-FRCC）是近几十年来发展起来的一种新型复合材料。由于极低的水/胶比和大量水泥产生的高度致密的微观结构，它们显示出优异的机械性能和耐久性。因此，用高掺量粉煤灰（HVFA）代替部分水泥含量可能是改善超高压FRCC生态性能的有效途径。事实上，水泥基复合材料的大部分碳足迹是由水泥制造过程中产生的二氧化碳造成的。另一方面，HVFA倾向于降低UHP-FRCC的力学性能，特别是在早期。为了评估一些水泥替代（20，50和70%的重量）的效果，一系列的单轴压缩和拉伸试验已经完成，并在本文中进行了描述。同时，通过生态力学指数（EMI），生态性能进行评估的基础上测得的机械性能。因此，UHP-FRCC在全尺寸结构中的应用（例如，复合混凝土柱）在HVFA存在下确实很方便，尽管材料性能（特别是抗压强度）显示出相反的趋势。
Ultra High Performance – Fiber Reinforced Cementitious Composites (UHP-FRCC) has successfully developed in the last decades. They show excellent mechanical properties and durability, due to the highly dense microstructure produced by extremely low water/binder ratio and large amounts of cement. Thus, replacing part of the cement content with High Volume Fly Ash (HVFA) could be an effective way to improve also the ecological properties of UHP-FRCC. Indeed, most of the carbon footprint of cement-based composites is caused by the CO2production of cement manufacturing. On the other hand, HVFA tends to reduce the mechanical properties of UHP-FRCC, especially at the early age. To evaluate the effect of some cement replacement (20, 50 and 70% by weight), a series of uniaxial compression and tensile tests have been performed and described in this paper. At the same time, through the Eco-Mechanical Index (EMI), ecological performances are evaluated on the basis of the measured mechanical properties. As a result, the application of UHP-FRCC in full-scale structures (e.g., composite concrete columns) is really convenient in the presence of HVFA, although the material properties (the compressive strength, in particular) show an opposite trend.
影响因子：
10.5
作者：
Wille, K.;El-Tawil, S.;Naaman, A. E.
通讯作者：
Naaman, A. E.