Flexural-Fatigue Properties of Sustainable Pervious Concrete Pavement Material Containing Ground Tire Rubber and Silica Fume

Abstract

With the development of urbanization, pervious concrete has been increasingly used in urban road pavement structures. The objective of this paper was to investigate the effect of stress levels and modifier (ground tire rubber and silica fume) on the fatigue life of pervious concrete and establish the fatigue equations with different survival probabilities. In order to improve the deformability of pervious concrete without sacrificing its strength, ground tire rubber and silica fume were added into pervious concrete. Two kinds of pervious concrete, control pervious concrete and ground tire rubber and silica fume modified pervious concrete, were made in the laboratory. The pervious concrete beam specimens of 100 × 100 × 400 mm were casted, and the static flexural strength and flexural strain of the two kinds of pervious concrete were tested. The fatigue lives of two pervious concretes were tested using MTS fatigue testing machine under four different stress levels (0.85, 0.80, 0.75, and 0.70). The fatigue life was analyzed by two-parameter Weibull distribution. The parameters of Weibull distribution were determined by graphical method, maximum likelihood method and moment method. The Kolmogorov–Smirnov test was used to test the Weibull distribution and the fatigue equations under different survival probabilities were established. The results showed that ground tire rubber and silica fume modified pervious concrete had better deformability while ensuring strength compared to control pervious concrete. The addition of ground tire rubber and silica fume improved the fatigue life of pervious concrete. The two-parameter Weibull distribution was suitable to characterize the fatigue characteristics and predict the fatigue life of pervious concrete. Fatigue equations with different survival probabilities were a good guide for pervious concrete design.

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

“…e preparation method, the production, and curing condition of RSFPC specimens have been reported in detail in [21]. e sizes of the specimens are as follows: cube specimen with 100 × 100 × 100 mm for compressive strength and F-T cycles tests; prism specimen with 100 × 100 × 400 mm for flexural experiments.…”

“…Generally speaking, the permeability and compressive strength of PC can meet the engineering requirements [17][18][19][20]. However, when PC is used as road surface or base layer, it will often be subjected to the repeated vehicle loads, which requires that PC not only has sufficient strength but also has certain deformability to resist fatigue [21]. Moreover, the porous structure of PC makes the adverse effect of F-T more serious than that of ordinary concrete.…”

A review of factors influencing performance of pervious concrete

“…Porosity is a fundamental property that serves the purposes of porous concrete due to the permeation of water. Liu et al [44] mention that porosity plays a predominant role in describing properties of pervious concrete. However, porosity does not offer any advantage in mechanical properties of concrete and can hence be considered as the weakest portion of the porous concrete structure [45].…”

“…Connected pores play a major role in influencing the porosity and drainage properties [27,48] whereas the open porosity influences the strength properties of pervious concrete [48]. Liu et al [44] determined that the total porosity involves 10 to 20 % of closed pores and 80 to 90 % of effective or connected pores.…”

Study of SPRC Impact Resistance Based on the Weibull Distribution and the Response Surface Method

“…Silica fume is commonly used in UHPC to improve mechanical properties, and the cement replacement ratio of silica fume is typically within 20% [ 24 ]. Although Luan et al [ 25 ] found that the drying shrinkage of UHPC increased with the increase of silica fume content, some scholars have found that the incorporation of a small amount of silica fume has many advantages [ 26 , 27 , 28 , 29 , 30 , 31 ]. Poon et al [ 26 ] found that, with the incorporation of silica fume, the compressive strength and chloride ion penetration resistance of concrete were improved.…”