Experimental study on the effect of strain rates on the dynamic flexural properties of rubber concrete

Feng, Wanhui; Liu, Feng; Yang, Fei; Li, Lijuan; Jing, Lin; Chen, Baiyu; Yuan, Bing

doi:10.1016/j.conbuildmat.2019.07.084

Cited by 54 publications

(13 citation statements)

References 41 publications

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“…It is evident that the RULCC is more sensitive to the strain-rate on the dynamic compressive strength compared to the normal concrete, normal rubberized concrete and ultra-lightweight concrete. Similar to the observations from the previous investigations [26,30,31], the strength of concrete increases with the increase of strain rate. In this paper, different load pressure (0.2MPa, 0.3MPa, 0.4MPa and 0.5MPa) with respective strain rates of 91.9~105.3/s, 123.4~138.2/s, 149.9~159.8/s, 166.4~186.5/s are considered.…”

Section: Effect Of Strain Ratesupporting

confidence: 90%

“…DIF is an indicator of strength improvement that is defined as the ratio of dynamic compressive strength to static compressive strength [26,[29][30][31]. CEB-FIP [8] proposed a formula to calculate the DIF of normal concrete with respect to the strain rate.…”

Section: Modified Equation For Difmentioning

confidence: 99%

“…In 1996, Fedroff et al [25] pioneered in producing rubberized concrete by mixing rubber powder made from grinding waste tires, which offered a new approach to recycle waste tires and started a new research topic on rubberized concrete. Many studies have since shown that, compared with the ordinary concrete, rubberized concrete has good resistance to crack and abrasion and energy dissipation capacity [26][27][28][29][30][31][32][33][34]. As an elastomer, rubber aggregates in concrete can restrain the generation and development of cracks, thus improve the energy dissipation capacities of concrete [25,26].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic compressive behavior of a novel ultra-lightweight cement composite incorporated with rubber powder

Huang

Sui

Wang

et al. 2020

Composite Structures

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This paper develops a novel rubberized ultra-lightweight high ductility cement composite (RULCC) with added rubber powder and low content PE fiber (0.7%), and investigates the dynamic compressive response and failure mechanism of the RULCC both experimentally and analytically. The test program examines the dynamic compressive stress-strain relationship of the RULCC through Split Hopkinson Pressure Bar (SHPB) impact tests. The results show that the rubber powder aggregates have significant effect on the compressive strength, stress-strain relations and failure mechanism of the RULCC. A volume replacement of fine aggregates with 5%, 10% and 20% rubber power results in a reduction in static compressive strength by 29.5%, 47.7% and 60.3%, respectively. The RULCC with a low fiber content of 0.7% in volume exhibits a 3% direct tensile strain, and a 4-5% tensile strain can still be achieved after 10% rubber powder is added to the RULCC, showing a high ductility of the material. The SHPB impact test shows that the compressive strength increases with strain rate. An empirical model, taking into account of the replacement ratio of the rubber powder aggregates in the RULCC, is developed in this paper to evaluate the Dynamic Increasing Factor (DIF). The experimental and analytical studies are essential to better understand the fundamental dynamic behavior of the RULCC for its further applications in engineering applications, such as protective structures, etc.

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Section: Effect Of Strain Ratesupporting

confidence: 90%

Section: Modified Equation For Difmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamic compressive behavior of a novel ultra-lightweight cement composite incorporated with rubber powder

Huang

Sui

Wang

et al. 2020

Composite Structures

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“…With the acceleration of industrialization, a large number of industrial wastes, such as fly ash, slag powder, tailings and waste rubber, are seriously endangering the ecological environment [7,8]. The application of these harmful substances in the production of building materials can not only solve the problem of environmental pollution, but also reduce the production cost of building materials, so it has been widely concerned.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Microcosmic Properties of Self-Compacting Concrete Modified by Compound Admixtures

Song¹,

Qi²,

Ai³

et al. 2022

Journal of Renewable Materials

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It has become a research hotspot to explore raw material substitutes of concrete. It is important to research the mechanical properties of self-compacting concrete (SCC) with slag powder (SP) and rubber particle (RP) replacing cement and coarse aggregate, respectively. 12 kinds of composite modified self-compacting concrete (CMSCC) specimens were prepared by using 10%, 20% and 30% SP and 30%, 40%, 50% and 60% RP. The rheological properties, mechanical properties and microstructure of the CMSCC were investigated. Results indicate that the workability, compressive strength, splitting tensile strength and flexural strength of CMSCC prepared by 20% SP and less than 40% RP are improved. In order to maximize the utilization of waste materials, 20% SP and 40% RP can be used as the optimal ratio of the combined modifier. The microstructure shows that the addition of proper amount of SP is conducive to the formation of increasingly more uniform C-S-H gel. C-S-H gel can fill the internal pores of the sample and enhance the adhesion between the aggregate, thus improving the mechanical properties of CMSCC. RP has a rougher surface and lower density and stiffness, which inhibits the workability and mechanical properties of CMSCC. The above research results have important theoretical and practical significance for the selection of raw materials of self-compacting concrete and the rational use of industrial wastes.

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“…Some researchers have divided the discarded rubber tires into pieces and particles, added them into concrete, and then conducted compression tests and splitting tests on the concrete specimens [25][26][27][28]. e experimental results found that although compressive strength and bending strength of rubber concrete were reduced, its toughness improved [19,[29][30][31]. Additionally, researchers have also investigated the impact properties of rubber concrete [32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Effect of Rubber Powder on Mechanical Properties of PVA Fiber Concrete

Wang

Zeng

et al. 2021

Advances in Civil Engineering

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To verify the damping improvement by replacing partial sand with rubber powder in the concrete process, this study investigated the effects of the rubber powder (5%, 10%, 15%, and 20%) on the mechanical properties and micromechanism of polyvinyl alcohol (PVA) fiber-reinforced concrete. In addition, in order to discuss its damping performance, free vibration test was conducted. Microstructure analyses were conducted by the scanning electron microscope (SEM) test. These results indicated that, as the content of the rubber powder increased, the damping ratio increased, and the compressive strength decreased, but this strength loss can be effectively controlled by adding PVA fiber. The rubber powder with a volume content of 5% and PVA with a mass of 2.4 kg/m3 were the most optimal mixing to balance the strength and damping requirement. According to the SEM test results, the rubber powder was beneficial to improve the damping ratio of PVA concrete, but it aggravated its interface defects.

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Experimental study on the effect of strain rates on the dynamic flexural properties of rubber concrete

Cited by 54 publications

References 41 publications

Dynamic compressive behavior of a novel ultra-lightweight cement composite incorporated with rubber powder

Dynamic compressive behavior of a novel ultra-lightweight cement composite incorporated with rubber powder

Mechanical Properties and Microcosmic Properties of Self-Compacting Concrete Modified by Compound Admixtures

Experimental Investigation on the Effect of Rubber Powder on Mechanical Properties of PVA Fiber Concrete

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