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

Zhou, Chonggang; Pei, Xingwang; Li, Wenlong; Liu, Yijun

doi:10.3390/ma13082004

Cited by 11 publications

(2 citation statements)

References 24 publications

(63 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been proved that 100% replacement of coarse aggregate by recycled aggregates could enhance the damping property of the concrete, but improvement of damping capacity is less than 10%, although the replacement of recycled aggregates reaches 100% [ 10 , 12 ]. The addition of air-entraining agents in concrete can also improve the damping ratio due to the increased porosity of concrete, and the pores inside work as cushioning bags to absorb vibration, but high porosity negatively affects the mechanical properties of concrete [ 13 ]. Moreover, different fibers such as synthetic fibers, nanofibers, and natural fibers were studied to add to concrete to improve energy dissipation [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Types of Microparticles on Vibration Reducibility of Cementitious Composites

Park

Pyo

2022

Materials

View full text Add to dashboard Cite

The vibration-reducing ability of construction materials is generally described by the damping ratio of the materials. Previously, many studies on the damping ratio of concrete have been done, such as the addition of rubber, polymer, fiber, and recycled aggregates in the concrete. However, the application of these materials in construction is limited due to their drawbacks. This paper investigated the effect of the replacement ratio and the size of the hollow glass microspheres (HGM), cenospheres (CS), and graphite flakes (GF) on the damping ratio of mortar. Furthermore, rubber particles (RP), aluminum powder (AP), and natural fiber (NF) were investigated to find if they have a combination effect with HGM. The half-power bandwidth method was conducted to obtain the damping ratio at 28 days of curing, and the compressive and flexural strength tests were also conducted to study the mechanical properties of mortar that contained HGM, CS, and GF. The results show that increases in the size of HGM and the replacement ratio of sand with HGM lead to an increase in the damping ratio. Moreover, RP and NF do not provide a combination effect with HGM on the damping ratio, whereas the application of AP results in a drastic compressive strength decrease even with an increase in damping ratio when incorporated with HGM. Besides, an increase in the replacement percentage of CS also leads to an improvement in the damping ratio, and a smaller size and higher replacement ratio of GFs can improve the damping ratio compared to other additives. As a result, CS and GF are more effective than HGM. 50% replacement ratio of CS slightly reduced the compressive strength by 6.4 MPa while improving the damping ratio by 15%, and 10% replacement ratio of samller GF can enhance the flexural strength by over 4.55% while increasing the damping ratio by 20.83%.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Types of Microparticles on Vibration Reducibility of Cementitious Composites

Park

Pyo

2022

Materials

View full text Add to dashboard Cite

show abstract

“…Compared with natural aggregate concrete (NAC), recycled aggregate concrete (RAC) damping performance improvement was attributed to various factors, such as the bond between the new‐to‐old interfacial transition zone (ITZ) and different new concrete strengths. Various researches 8–12 in the past have been carried out to improve the damping performance of RAC, and the commonly adopted method is to use polymer materials to modify concrete. According to the literature, it was found that the damping performance of concrete after modification can be improved, but the strength and stiffness will be reduced.…”

Section: Introductionmentioning

confidence: 99%

Influence of new‐to‐old concrete interface on the damping behavior of recycled aggregate concrete

Tan

Singh

2021

Structural Concrete

View full text Add to dashboard Cite

The interface transition zone (ITZ) is a critical component of concrete, as it has a significant effect on the material's mechanical properties. This paper using specimens of bonded new and old concrete analyzes the effect of the interface in recycled concrete on damping performance using semi precast concrete specimens with old and new concrete. To determine the effect of the bonding zone between new and old concrete on the damping ratio of recycled concrete, the free vibration attenuation test method was used. When the acceleration signal from the specimen's transverse vibration is transformed to the frequency domain, the study observes two prominent peaks. The damping ratio is between 0.005 and 0.007 at the high‐frequency position and 0.06–0.08 at the low‐frequency position. When the excitation position is not in the bonding zone, the damping ratio measured in the bonding zone has a smaller average value. Under different recycled aggregate replacement rates, there is a significant difference in the damping ratio and frequency of old and new concrete bonded specimens, as well as complete recycled concrete specimens. The bonding zone's damping ratio data is more discrete than that of other locations. The damping ratio and the acceleration amplitude exhibit an excellent linear relationship, with the damping ratio increasing as the amplitude increases. The damping ratio varies significantly more in the longitudinal direction, with no apparent relationship to the acceleration amplitude.

show abstract

Improved sound absorption performance of synthetic fiber materials for industrial noise reduction: a review

Liang

Liu

et al. 2022

J Porous Mater

View full text Add to dashboard Cite

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

Cited by 11 publications

References 24 publications

Effect of Types of Microparticles on Vibration Reducibility of Cementitious Composites

Effect of Types of Microparticles on Vibration Reducibility of Cementitious Composites

Influence of new‐to‐old concrete interface on the damping behavior of recycled aggregate concrete

Improved sound absorption performance of synthetic fiber materials for industrial noise reduction: a review

Contact Info

Product

Resources

About