超高体积粉煤灰复合材料的工程性能

IF 2.7 Q2 ENGINEERING, CIVIL Sustainable and Resilient Infrastructure Pub Date : 2022-03-11 DOI:10.1080/23789689.2022.2033938

H. Myadaraboina, C. Gunasekara, D. Law

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引用次数: 0

摘要

摘要为了提高大体积粉煤灰混凝土的早期强度，建议在混凝土中加入少量石灰。然而，在超高体积粉煤灰混凝土(VHVFAC)的情况下，石灰的数量可能不够。本研究比较了超细粉煤灰替代80%水泥并添加石灰和硅灰(SF)的VHVFAC与PC混凝土在90天内的力学性能。给出了VHVFAC抗压强度与其他力学性能的相关性。SF的使用增强了VHVFAC的力学性能，且在早期增加更为明显。90天结束时，VHVFAC的力学性能与PC混凝土相似。

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Engineering properties of very high volume fly ash composite

ABSTRACT The addition of a small quantity of lime has been recommended to enhance the early strength of High-Volume Fly Ash Concrete. However, the quantity of lime may not be adequate in the case of Very High Volume Fly Ash Concrete (VHVFAC). This study compares the mechanical properties of VHVFAC with 80% cement replacement with ultrafine fly ash with the addition of lime and silica fume (SF), with that of PC concrete over a 90-day period. Correlation between the compressive strength and other mechanical properties of VHVFAC are presented. The use of SF enhanced the mechanical properties of the VHVFAC, with the increase more predominant at early age. VHVFAC exhibited similar mechanical performance with PC concrete by the end of the 90 days.

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来源期刊

Sustainable and Resilient Infrastructure ENGINEERING, CIVIL-

CiteScore

7.60

自引率

10.20%

发文量

期刊介绍： Sustainable and Resilient Infrastructure is an interdisciplinary journal that focuses on the sustainable development of resilient communities. Sustainability is defined in relation to the ability of infrastructure to address the needs of the present without sacrificing the ability of future generations to meet their needs. Resilience is considered in relation to both natural hazards (like earthquakes, tsunami, hurricanes, cyclones, tornado, flooding and drought) and anthropogenic hazards (like human errors and malevolent attacks.) Resilience is taken to depend both on the performance of the built and modified natural environment and on the contextual characteristics of social, economic and political institutions. Sustainability and resilience are considered both for physical and non-physical infrastructure.