Performance Evaluation of Waste Crumb Rubber/Silica Fume Composite Modified Pervious Concrete in Seasonal Frozen Regions

Abstract

The waste crumb rubber (WCR) and silica fume (SF), as industrial waste and byproduct, are widely used as additives in road construction materials, which can not only realize waste utilization and protect the environment but also reduce the consumption of building material resources. At present, most of the research has focused on the properties of concrete modified only by WCR or SF; there are few studies concentrated on composite modified concrete by the two, especially the study on pervious concrete (PC). This article aims to study the mechanical strength, deformability, and freeze-thaw (F-T) resistance of waste crumb rubber/silica fume composite modified pervious concrete (RSFPC). The RSFPC and control specimens were manufactured in the lab. The experiments of compressive strength, flexural strength, flexural failure strain, flexural elastic modulus, and F-T cycles were conducted. In addition, the properties of RSFPC were compared with WCR and SF single modification PC. The results indicate that the composite modification of WCR and SF can give full play to the advantages of the two materials so that the strength property and elastic modulus of PC will not be decreased and the F-T resistance and deformability can be greatly improved. Compared to a single modification group by WCR or SF, RSFPC has a more balanced and comprehensive performance, which will greatly expand the application of PC.

Durability of Rubberized Concrete with Recycled Steel Fibers from Tyre Recycling in Aggresive Enviroments

“…Hence, attack processes such as carbonation, acid attack and freeze--thaw degradation in concrete can be accelerated. Contradictory results have been found in the literature about the influence of rubber particle size, some authors have reported that the higher the size the lower the water permeability [27], and other set a maximum size of 0.5-5 mm [35]. However, water absorption of RuC can be reduced through the pretreatment of rubber aggregates -with NaOH, or with KMnO4-or with cement slurry, as a bond between treated rubber aggregates and cement hydration products is obtained.…”

“…Disruption of concrete can also occur due to the increase in volume of free water upon freezing or the formation of new chemical components, which creates internal stresses and, subsequently, cracking and degradation. Freeze-thaw process has been studied in plain and rubberized concrete, observing several authors an improvement when rubber aggregates are used [16,17,33,35,[47][48][49]. Freeze-thaw durability performance is also observed in RuC with a pretreatment of the surface of rubber aggregates to improve interfacial transition zones (ITZ) with the cement matrix [23,50], with pozzolan addition, such as silica fume [36,51] and with fiber reinforcement [30].…”

Workability and Durability of Concrete Incorporating Waste Tire Rubber: A Review

“…Table 5: Freeze-thaw resistance of RC with varying RA size and content adapted with permission from reference [96], Copyright © 2021, Guobao Luo et al, reference [97], © 2021, IOP Publishing, reference [68], Copyright © 2017, Elsevier B.V., reference [92], Copyright © 2018, Elsevier B.V., reference [98], Copyright © 2016, Rom J Mater., reference [94] In contrast, a rubber content that is too high negatively affects freezing resistance. When the replacement level exceeds a certain level (5% of the total admixture), the improvement in freeze-thaw resistance is not significant [91].…”

“…Although the improvement effect of compounding waste rubber powder and silica fume was better than that of rubber powder alone, it was not as good as that of silica fume. The composite effect is not the superposition of the properties of the two materials because the effects of waste rubber powder and silica fume on the mechanical properties are different [96].…”

Rainstorm Resistance of Recycled Pervious Concrete under the Coupling of Fatigue and Freeze–Thaw Cycles

“…In China, almost half of regions fall within cold zones [19] with the deterioration caused by F-T cycles being one of the major reasons for the limited application of pervious concrete [20,21]. The substantial porosity of pervious concrete contributes to the degree of damage it sustains in F-T conditions being significantly more severe than typical concrete [22].…”