Pervious concrete

About: Pervious concrete is a research topic. Over the lifetime, 2920 publications have been published within this topic receiving 27720 citations. The topic is also known as: porous concrete & permeable concrete.

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.

Novel road surface permeable concrete product and preparation method of novel road surface permeable concrete product

Abstract: The invention provides a novel road surface permeable concrete product and a preparation method of the novel road surface permeable concrete product. The permeable concrete product is prepared from the following raw materials including composite aggregate, a gel material, a composite additive and water at the weight ratio of (2.0 to 3.0) to 1 to (0.003 to 0.03) to (0.25 to 0.35); the composite aggregate is prepared from regenerated aggregate and common aggregate. The permeable concrete product prepared by the invention has water permeability with different gradients and diversified permeable rates; the 28d compressive strength of the prepared permeable concrete product is 5MPa to 15MPa and the permeable rate of the prepared permeable concrete product is 0.5mm/s to 10mm/s. According to the novel road surface permeable concrete product provided by the invention, a construction process can be simplified, and engineering construction can be finished at a single time according to actual engineering requirements; the technical effect which is the same as that of a plurality of times of construction in the prior art can be obtained; when the permeable concrete product is used for paving a side pavement on a road surface, people walking on the road surface can feel comfortable and elastic.