Dynamic Properties of Pretreated Rubberized Concrete under Incremental Loading

Abstract

Recycling scrap tyres as alternative aggregates of concrete is an innovative option. To clarify the dynamic properties of the pretreated rubberized concrete with some cumulative damage, the natural frequency, flexural dynamic stiffness, and damping ratio of the specimens under incremental stress level were investigated in this paper. The results indicated that the pretreatment of rubber particles improved the strength, ductility, and crack resistance of the rubberized concrete. The reduction of the flexural dynamic stiffness was clarified with the increase of concrete stress level. The addition of the pretreated rubber particles enhanced the concrete energy dissipation capacity during the destruction, and the specimen dissipated more energy with the increase of rubber content before its failure.

Experimental Study on the Influence of Rubber Content on Chloride Salt Corrosion Resistance Performance of Concrete

“…On the other hand, promoting the engineering application of rubber concrete can better solve the “black pollution” caused by waste tire rubber, making rubber concrete a hot spot for scholars at home and abroad [ 20 , 21 ]. For this reason, scholars at home and abroad have performed a lot of scientific experimental research on rubber concrete, and have produced fruitful research results, which provide a basis for the feasibility of rubber concrete materials in practical engineering and promote the development of civil engineering disciplines, such as Chen Aijiu et al [ 22 ] who used rubber particles to replace fine aggregate to prepare rubber concrete and conducted impact resistance tests, and found that rubber can effectively improve the impact resistance of concrete and improve the brittleness of concrete. Meanwhile, Ren Rui et al [ 23 ] studied the influence of rubber particle size and content on the axial compressive performance of concrete, and gave the relationship between the axial compressive strength and cubic compressive strength of rubber concrete, as well as the stress–strain curve and peak stress formula.…”

A comprehensive review of the features of self-compacting rubberized concrete in the fresh and hardened states

“…To solve this problem, using rubber in SCC can be considered a positive step toward aiding sustainable development, as scrap road vehicle tires are a significant part of the world's solid waste management problem and will continue to be so in the future [21]. Therefore, increased flexibility, reduced total concrete mass, improved dynamic properties [22], increased toughness [23], ductility [24], impact resistance [25] increased freeze-thaw resistance [12,26], increased cracking resistance [27], increased fracture energy [28], strain performance [6], and concrete resistance to tensile stresses [29] are all convincing reasons to continue experimental research and laboratory work on reinforced concrete with a certain percentage of recycled rubber powder and granules as a replacement material for fine or coarse aggregate. Due to the convenience of RuC and SCC, the SCRC is gaining popularity among researchers and is being investigated extensively [30].…”