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首页> 外文期刊>Australian journal of civil engineering >Effects of curing types, fly ash fineness and fibre lengths on mechanical and impact properties of steel fibre reinforced concretes
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Effects of curing types, fly ash fineness and fibre lengths on mechanical and impact properties of steel fibre reinforced concretes

机译：固化类型，粉煤灰细度和纤维长度对钢纤维混凝土机械和冲击性能的影响

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摘要

This paper presents the effects of fly ash fineness, steel fibre lengths and types of curing on the compressive strength and impact strength of steel fibre reinforced concrete (SFRC). To study these behaviour, the SFRC mixtures were prepared using class-F fly ashes with specific surface areas of 2320,3320 and 5980 cm~2/g and steel fibres with lengths of 8,13 and 16 mm. The SFRC samples were subjected to standard wet curing, steam curing and hot water curing. The compressive strength tests were carried out after 7-, 28-, 90- and 180-day curing periods and the impact strength test was carried out after 90 days of respective curing. Results show that the workability of SFRC decreases with increase in fly ash fineness and steel fibre lengths. Results also show that the compressive strength of SFRC increase with increase in fly ash fineness and increase in length of steel fibres at all ages and all curing conditions. However, steam curing shows significant improvement in compressive strength gains of all SFRC compared to hot water curing at all ages except at 180 days. Good correlations are also observed in compressive strength with increase in steel fibre lengths at 28 and 90 days.
机译：本文介绍了粉煤灰细度，钢纤维长度和固化类型对钢纤维钢筋混凝土（SFRC）的抗压强度和冲击强度的影响。为了研究这些行为，使用具有2320,3320和5980cm〜2 / g的特定表面积和5980cm〜2 / g和长度为8,13和16mm的钢纤维来制备SFRC混合物。对SFRC样品进行标准湿固化，蒸汽固化和热水固化。在7-，28-，90-和180天固化期后进行压缩强度试验，并在相应固化的90天后进行冲击强度试验。结果表明，SFRC的可加工性随着粉煤灰细度和钢纤维长度的增加而降低。结果还表明，SFRC的抗压强度随着粉煤灰细度的增加而增加，并且在所有年龄段的钢纤维的长度和所有固化条件下增加。然而，与所有年龄段的热水固化相比，蒸汽固化表现出所有SFRC的压缩强度增益的显着改善，除了在180天后。在抗压强度中也观察到良好的相关性，随着28和90天的钢纤维长度的增加。

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