Rendering mortars with crumb rubber: Mechanical strength, thermal and fire properties and durability behaviour

Soil-Cement Bricks Development Using Polymeric Waste

“…The thermal conductivity values reduction on treatments is due to the higher amount of pores observed in such treatments (Figure 2) compared to other percentages evaluated on each type of reinforcement material since air pockets offer better insulation in composites (Kazmierczak et al 2020), and also the low thermal conductivity values for PET (0.24 W / m.°C) and tire (0.15 W / m.K) (Speight 2005). Overall, such treatments show the effectiveness of reinforcement materials as heat sinks since the particles acted as obstacles and also generated pores that helped reduce thermal conductivity, which is excellent for use in the construction industry.…”

Effect of basalt and polypropylene fibers on crumb rubber mortar with Portland cement and calcium aluminate cement binders: Strength and artificial neural network prediction model

“…14 It is worth mentioning that the type of material and the bonding between CR and binder play an essential role in the performance. 4,15 Moreover, according to Mousavimehr et al, 16 concrete containing CR experienced greater weight and strength loss when exposed to elevated temperatures. This is particularly critical when adopted in building structures, as the fire resistance of building material needs to be considered.…”

“…5 Particularly, the CR tends to decrease the compressive strength of concrete. 4,13 Around 77% and 89% reduction in compressive and flexural strengths were observed when natural sand was partially replaced with CR between 40% and 60% by volume. 14 It is worth mentioning that the type of material and the bonding between CR and binder play an essential role in the performance.…”

“…3 The reuse of scrap tire rubber in cement composites takes a unique viewpoint and has been investigated since the 1990s. 4 Rubber particles can be effectively blended with cement and aggregates to produce lightweight CR cement-based materials such as concrete and mortar. The use of rubber in cementitious mixtures to partially replace natural aggregates is identified to reduce the self-weight of the mixture along with a reduction in the environmental impacts.…”

“…8 Moreover, a decrease in density with rubber addition is commonly observed due to its lightweight nature and the increase of air content in the mixture. 4 It has also been reported that the reuse of waste tires as fine aggregates helps the concrete to achieve better fatigue resistance, 9 crack resistance, 10 as well as notable improvements in preventing external dynamic loads such as earthquakes and wind. 11 In addition, rubber aggregates can improve the freeze-thaw degeneration resistance of concrete, according to Si et al 12 Nevertheless, CR usage in concrete generally reduces mechanical performance.…”