活性硅砂粉混凝土(RSSPC)单轴抗压强度研究

H. Sadeghi
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引用次数: 1

摘要

如今,高强度混凝土是许多高层建筑的组成部分。根据ACI 211.1-91,混合料骨料尺寸应小于0.5英寸,以达到大于9000 psi的单轴抗压强度。另一方面,寻找合适的骨料级配是混凝土配合比设计的重要内容;因此,作者提出了不含粗骨料的混合比例仍能承受足够的强度。硅砂粉混凝土是一种自身成分中实际上没有粗料的混凝土。在该混凝土中,唯一的骨料是粒径小于150 μm的硅砂粉,粒径非常小。根据ASTM C 33,这种混凝土被归类为超细骨料混凝土。研究的目的是找出这种特殊混凝土在不同养护和固结条件下的抗压强度,并对每种方法进行比较。在这篇文章中,年轻的混凝土试件被压实与振动过程。值得一提的是,为了显示温度在养护过程中的作用,混凝土试件在20°C石灰水中养护或在90°C烤箱中蒸熟。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Reactive Silica Sand Powder Concrete (RSSPC) Uniaxial Compressive Strength Investigation
Nowadays, high-strength concrete is an integral part of so many high-rise buildings. In accordance with the ACI 211.1-91 the mixture aggregate size should be less than 0.5 inches in order to achieve a uniaxial compressive strength greater than 9000 psi. On the other hand, finding a suitable aggregate grading distribution of concrete mix design is a big deal; hence force, the authors propose a mix proportion with no coarse aggregate still withstand enough strength. Silica sand powder concrete is a type of concrete with actually no coarse material in its own composition. In this concrete, the only aggregate is silica sand powder in which its size is less than 150 μm that is very small in size. According to the ASTM C 33, this concrete is classified as an ultra-fine aggregate concrete. The research interest is to find the compressive strength of this particular concrete under different conditions of curing and consolidation to compare each approach with each other. In this article, the young concrete specimen was compacted with a pressing or vibrating process. It is worthwhile to mention that to show the role of temperature on the curing process, the concrete specimen was cured both in 20∘C lime water or autoclaved in 90∘C oven.
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