Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Filters applied. Clear all
. 2020 Apr 24;13(8):2004.
doi: 10.3390/ma13082004.

Mechanical and Damping Properties of Recycled Aggregate Concrete Modified With Air-Entraining Agent and Polypropylene Fiber

Affiliations
Free PMC article

Mechanical and Damping Properties of Recycled Aggregate Concrete Modified With Air-Entraining Agent and Polypropylene Fiber

Chonggang Zhou et al. Materials (Basel). .
Free PMC article

Abstract

In this study, recycled aggregate concrete (RAC) modified with polypropylene fiber (PP) and air-entraining agent (AGA) was prepared, and the effects of PP and AGA on the static (compressive strength, Young's modulus, and splitting tensile strength) and dynamic properties (dynamic modulus of elasticity and damping ratio) of RAC were investigated. The experimental results showed that the addition of an AGA and PP had a favorable effect on the damping ratio of the concrete, however, the addition of the AGA had a slightly negative effect on the mechanical performance of the concrete. The AGA and PP contents required to achieve the optimum damping ratio of the concrete with the least reduction in the mechanical performance were 0.02% and 0.10%, respectively. Furthermore, the addition of AGA was more effective than that of PP in improving the damping property of the concrete.

Keywords: air-entraining agent; damping mechanism; dynamic behavior; interface transition zone; recycled aggregate concrete; static properties.

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Scanning electron micrograph of fly ash (FA).
Figure 2
Figure 2
Particle size distribution of FA.
Figure 3
Figure 3
Time-magnitude signal as the acceleration response signal.
Figure 4
Figure 4
Estimation of the damping ratio of concrete using the half-power bandwidth method [29].
Figure 5
Figure 5
Static properties of concrete after 28 days of curing: (a) compressive strength and (b) Young’s modulus.
Figure 6
Figure 6
Interface transition zones (ITZs) in RAC: (a) ITZ between aggregate and cement mortar and (b) ITZ between fiber and cement mortar.
Figure 7
Figure 7
Splitting tensile strength of concrete after 28 days of curing: (a) reference concrete and RAC modified with AGA and (b) reference concrete and RAC modified with PP.
Figure 8
Figure 8
Dynamic behavior of the reference concrete and RAC modified with AGA and PP: (a) dynamic modulus of elasticity and (b) damping ratio.
Figure 9
Figure 9
Images showing ITZs in RAC.
Figure 10
Figure 10
Bubbles and voids in RAC.

Similar articles

See all similar articles

References

    1. Lu D., Tang Z., Zhang L., Zhou J., Gong Y., Tian Y., Zhong J. Effects of combined usage of supplementary cementitious materials on the thermal properties and microstructure of high-performance concrete at high temperatures. Materials. 2020;13:1833 doi: 10.3390/ma13081833. - DOI - PMC - PubMed
    1. Saavedra W.G.V., de Gutiérrez R.M. Performance of geopolymer concrete composed of fly ash after exposure to elevated temperatures. Constr. Build. Mater. 2017;154:229–235. doi: 10.1016/j.conbuildmat.2017.07.208. - DOI
    1. Wang Z., Li L., Zhang Y., Wang W. Bond-slip model considering freeze-thaw damage effect of concrete and its application. Eng. Struct. 2019;201:109831. doi: 10.1016/j.engstruct.2019.109831. - DOI
    1. Liang C., Liu T., Xiao J., Zou D., Yang Q. The damping property of recycled aggregate concrete. Constr. Build. Mater. 2016;102:834–842. doi: 10.1016/j.conbuildmat.2015.11.026. - DOI
    1. Long G., Yang J., Xie Y. The mechanical characteristics of steam-cured high strength concrete incorporating with lightweight aggregate. Constr. Build. Mater. 2017;136:456–464. doi: 10.1016/j.conbuildmat.2016.12.171. - DOI
Feedback