Effect of the characteristics of lightweight aggregates presaturated polymer emulsion on the mechanical and damping properties of concrete

Tian, Ye; Yan, Xiaohui; Zhang, Mengyuan; Yang, Tingting; Zhang, Jun; Wang, Zhenjun

doi:10.1016/j.conbuildmat.2020.119154

Cited by 14 publications

(6 citation statements)

References 35 publications

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“…The main reasons were as follows: (1) There was a viscoelastic layer PUU between FSP and cement paste, which formed a microscopic constrained damping structure as in Figure 10 d. Under vibration conditions, FSP and cement paste had different deformation, which caused shear deformation of PUU. Then, the internal molecular chains of PUU dissipated the vibration energy into heat energy and other energies by friction, which acted for energy dissipation in the cement-based composites [ 8 , 18 , 35 , 36 ]. With more than 8 wt% doping amount, the compressive strength of FSP@PUU/cement composites decreased substantially, and the inside interfacial pressure decreased at the same time.…”

Section: Resultsmentioning

confidence: 99%

“…Under vibration conditions, FSP and cement paste had different deformation, which caused shear deformation of PUU. Then, the internal molecular chains of PUU dissipated the vibration energy into heat energy and other energies by friction, which acted for energy dissipation in the cement-based composites [8,18,35,36]. With more than 8 wt%…”

Section: Amplitude and Frequency Curve Analysismentioning

confidence: 99%

“…A fiber length of 5 cm and a fiber content of 5% has the best properties. Tian et al [ 8 ] found that the damping ratio of specimens containing 70% damping aggregate (DA) was approximately three times higher than that of the reference mortar, with a slight decrease in the mechanical properties. Adding fiber was more effective than rubber powder in improving the damping ratio of the cement mortar, and the optimal dosage of fiber was 0.5%.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Evaluation Mechanic Damping Properties of Fused Silica Powder@Polyurethane Urea/Cement Composites

et al. 2022

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In this paper, cement based on fused silica powder @ polyurethane urea (FSP@PUU) with a micro constrained damping structure was studied. Firstly, FSP@PUU core-shell particles were prepared by heterogeneous stepwise addition polymerization method and added into cement paste as damping filler to form a micro-constrained damping structure inside cement paste. The mechanical property and damping performance of cement-based composites were characterized by compressive strength, dynamic mechanical analysis (DMA) test and modal vibration test. The results showed that the damping performance of FSP @ PUU cement-based composites was affected by temperature, and the loss tangent of cement with 6wt% FSP@PUU increased to about 0.057 at −35 °C to 35 °C, which was 1.5 times cement paste within the glass transition temperature. With 6 wt% FSP@PUU, the damping ratio of cement-based composites increased by 58% compared with cement paste in the frequency range of 175–300 Hz, while the compressive strength decreased by only 5%. The cement with suitable FSP@PUU possesses excellent damping performance.

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Section: Resultsmentioning

confidence: 99%

Section: Amplitude and Frequency Curve Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation and Evaluation Mechanic Damping Properties of Fused Silica Powder@Polyurethane Urea/Cement Composites

et al. 2022

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“…Ceramsite concrete is brittle due to its aggregate properties; for example, the polymer emulsion (PLE) can dehydrate during the hardening process of concrete and form a spatial mesh structure [ 24 , 25 ]. Therefore, adding PLE to ceramsite concrete can improve its brittleness, durability and mechanical properties, as well as improving the microstructure of the concrete.…”

Section: Introductionmentioning

confidence: 99%

The Workability and Mechanical Performance of Fly Ash Cenosphere–Desert Sand Ceramsite Concrete: An Experimental Study and Analysis

Guo

Yuan

et al. 2023

Materials

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In order to alleviate the shortage of sand resources for construction, make full use of industrial waste and promote the development of green lightweight aggregate concrete in the desert and surrounding areas, this paper proposes a new lightweight ceramsite concrete, fly ash cenospheres and desert sand ceramsite concrete (FDCC). An orthogonal test was conducted to analyze the effects of the desert sand (DS) replacing ratio, fly ash cenosphere (FAC) replacing ratio and polymer emulsion (PLE) addition on the damage patterns, slump, apparent density and compressive strength of the FDCC. The results showed that the most influential factors for the slump, apparent density and compressive strength of the FDCC were the FAC replacing ratio, FAC replacing ratio and DS replacing ratio, respectively. Meanwhile, the PLE addition had little effect on the workability or mechanical performance of the FDCC. With the increase in the DS replacing ratio, the slump decreased rapidly and the compressive strength reached its peak value, increasing by 20.6% when the DS replacing ratio was 20%. With the increase in the FAC replacing ratio, the slump increased by 106%, the apparent density decreased gradually and the compressive decreased and then increased, reaching its lowest value when the FAC replacing ratio was 20%. According to the synthetic evaluation analysis, the optimum DS replacing ratio, FAC replacing ratio and PLE addition of the FDCC were 20%, 30% and 1%, respectively.

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“…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

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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.

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Effect of the characteristics of lightweight aggregates presaturated polymer emulsion on the mechanical and damping properties of concrete

Cited by 14 publications

References 35 publications

Preparation and Evaluation Mechanic Damping Properties of Fused Silica Powder@Polyurethane Urea/Cement Composites

Preparation and Evaluation Mechanic Damping Properties of Fused Silica Powder@Polyurethane Urea/Cement Composites

The Workability and Mechanical Performance of Fly Ash Cenosphere–Desert Sand Ceramsite Concrete: An Experimental Study and Analysis

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

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