增强纤维对再生细骨料混凝土力学性能和收缩开裂的影响

英 克崔, 金 亨吉, 圭 勇, 金 杰澈, 庆 南, 崔 洪燮
韩国建筑工程系

摘要

本文介绍了一项实验研究，旨在研究纤维增强材料对含有两种纤维聚乙烯醇（PVA）和尼龙的再生细骨料
混凝土（RFAC）的力学性能和收缩开裂的影响。在具有聚乙烯醇或尼龙纤维的RFAC中，使用少量的纤维体积分
数，例如0.05%或0.1%，以在最少量的情况下获得最佳效率。此外，为了对力学性能和收缩开裂进行比较评估，我
们还检查了天然细骨料混凝土。试验结果表明，纤维和细骨料的添加对提高所研究混凝土试件的力学性能以及控
制其开裂行为具有重要作用。纤维增强RFAC的抗压强度、劈裂抗拉强度和弯曲强度等力学性能略优于非纤维增强
RFAC。使用平板环型和板型试验检查收缩开裂行为。与非纤维增强混凝土相比，纤维增强RFAC的表面裂缝减少幅
度更大。在RFAC中添加少量体积分数的纤维对于干燥收缩裂缝比改善机械性能更有效。

关键词

纤维增强混凝土（FRC）；机械性能；再生细骨料；收缩开裂；小纤维体积分数

参考

[1]Pedro, D.; de Brito, J.; Evangelista, L. Performance

of concrete made with aggregates recycled from precasting

industry waste: Influence of the crushing process. Mater.

Struct. 2015, 48, 3965–3978.

[2]Manzi, S.; Mazzotti, C.; Bignozzi, M.C. Short and longterm behavior of structural concrete with recycled concrete

aggregate. Cem. Concr. Compos. 2013, 37, 312–318.

[3]Duan, Z.H.; Poon, C.S. Properties of recycled aggregate

concrete made with recycled aggregates with different amounts

of old adhered mortars. Mater. Des. 2014, 58, 19–29.

[4]Evangelista, L.; de Brito, J. Criteria for the use of

fine recycled concrete aggregate in concrete production. In

Proceedings of the International RILEM Conference: The Use

of Recycled Materials in Building and Structures, RILEM,

Barcelona, Spain, 8–11 November 2004; pp. 503–510.

[5]Zega, C.J.; Di Maio, Á.A. Use of recycled fine

aggregate in concretes with durable requirements. Waste

Manag. 2011, 31, 2336–2340.

[6]Yildirim, S.T.; Meyer, C.; Herfellner, S. Effects of

internal curing on the strength, drying shrinkage and freezethaw resistance of concrete containing recycled concrete

aggregates. Constr. Build. Mater. 2015, 91, 288–296.

[7]Khatib, J.M. Properties of concrete incorporating fine

recycled aggregate. Cem. Concr. Res. 2005, 35, 763–769.

[8]Behnood, A.; Olek, J.; Glinicki, M.A. Predicting

modulus elasticity of recycled aggregate concrete using M51

model tree algorithm. Constr. Build. Mater. 2015, 94, 137–

147.

[9]Ho, N.Y.; Lee, Y.P.K.; Lim, W.F.; Zayed, T.; Chew,

K.C.; Low, G.L.; Ting, S.K. Efficient utilization of recycled

concrete aggregate in structural concrete. J. Mater. Civ. Eng.

2013, 25, 318–327.

[10]Carneiro, J.A.; Lima, P.R.L.; Leite, M.B.; Filho, R.D.T.

Compressive stress–strain behavior of steel fiber reinforcedrecycled aggregate concrete. Cem. Concr. Compos. 2014, 46,

65–72.

[11]Akça, K.R.; Çakır, Ö.; ˙Ipek, M. Properties of

polypropylene fiber reinforced concrete using recycled

aggregates. Constr. Build. Mater. 2015, 98, 620–630.

[12]American Society for Testing Materials. Standard

Specification for Concrete Aggregates; ASTM C33; ASTM

International: West Conshohocken, PA, USA, 2013.

[13]Korean Standards Association. Recycled Aggregate

for Concrete; KS F 2573; Korean Industrial Standards: Seoul,

Korea, 2011. 23.

[14]American Society for Testing Materials. Standard

Test Method for Slump of Hydraulic-Cement Concrete; ASTM

C143; ASTM International: West Conshohocken, PA, USA,

2015.