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

Abstract

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.

Effect of rubber particles and fibers on the dynamic compressive behavior of novel ultra-lightweight cement composites: Numerical simulations and metamodeling

“…The novel rubberized ultra-lightweight high ductility cement composite (RULCC) to be modelled is composed of cement, fly ash cenospheres (FAC), silica fume, rubber powder aggregates and polymer polyethylene (PE) fibers. The RULCC has a target 28-day compressive strength around 35MPa with a low density of around 1450kg/m Further details about the manufacturing process of the materials can be found in Huang et al [46].…”

“…To evaluate the properties of the material, the mixes with seven different rubber and fiber contents were tested in Huang et al [46], as listed in Table 1, which includes the replacement ratios of rubber contents (5%, 10%, 15% and 20%) and fiber contents (0% and 0.7%). The mechanical properties of the PE fibers are shown in Table 2.…”

“…One of the major issues of the existing formulas is that the rubber and fiber content ratios cannot be taken into account in the predictions. This is why they have failed to cover a range of lightweight concrete as the influence of rubber particles and fibers on the concrete dynamic performance is significant and should be considered, as illustrated by the test results in Huang et al [46].…”

Influence of Rubber Powder Modification Methods on the Mechanical and Durability Properties of Rubberized Magnesium Oxychloride Cement

“…Plenty of earlier experiments [18][19][20][21][22][23][24] also suggested that it was possible to effectively improve cementation between rubber powders and cement and increase the flexural and compressive strength of rubber cement-based composite materials by giving specific treatments to the surface of rubber powders. For example, Senouci et al removed the stains on the surface of rubber powders simply by soaking and rinsing; Rostami et al soaked and cleaned the rubber powders with distilled water, CCl 4 reagent, and organic mixed emulsion.…”

Dynamic Properties of Pretreated Rubberized Concrete under Incremental Loading

“…In recent years, the continuous development of new raw materials has enriched the materials in the field of construction [ 1 , 2 , 3 , 4 ], among which the treatment and recovery of solid waste are of great significance for environmental protection, such as the utilization of recycled tyre polymer fiber as concrete reinforced materials by Chen et al [ 1 ], the incorporation of construction and demolition wastes as recycled aggregates by Rodríguez et al [ 2 ], and the utilization of waste tyre rubber as concrete material by Huang et al [ 3 ] and Gupta et al [ 4 ]. The scrap tyre has become one of the most problematic solid wastes throughout the world, and many researchers have proved that scrap tyres are sources of valuable raw materials [ 5 , 6 , 7 ].…”