Mix Design and Mechanical Properties of High-Performance Pervious Concrete

Abstract

The mechanical properties of traditional pervious concrete are insufficient, which limits its application. In view of the imperfections of traditional permeable concrete in mechanics, this paper aimed to find a suitable material composition that can be used as a feasible mix design of high-performance pervious concrete, to essentially improve its mechanical properties. Based on the view that concrete is a two-phase material, in order to understand the rheological properties of the matrix, it was subjected to a rheological test, and then the filler aggregate was uniformly incorporated into the aforementioned matrix to further explore the composition and properties of the resulting pervious concrete. For the matrix, the orthogonal array employed was L16(45), which consisted of five factors, each with four levels. Base on the fluidity and compressive strength of the tested matrix, three groups of suitable matrixes mix proportions were selected to serve as the matrix type for pervious concrete mix proportion design. Then, an orthogonal array L9(34), which consisted of four controllable three-level factors, was adopted in the pervious concrete. The parameters investigated included the coarse aggregate size, fine aggregate content, matrix type, and aggregate-to-binder ratio. The test results demonstrate that the key factors affecting the compressive strength of the matrix and the pervious concrete were closely related to the cementitious material. In the matrix, the proportion of the cementitious material was the most important factor, while in the pervious concrete, the type of matrix was the most important factor.

Model-Based Adaptive Machine Learning Approach in Concrete Mix Design

“…After designing the concrete mix composition and laboratory tests, the last part of the process is preparing a working recipe for 1 m 3 of concrete mix. It is also vital to consider the recipe changes that may result from the dampness of the aggregate and adapt it to individual conditions, such as the capacity of a transport vehicle [ 29 , 30 ].…”

Numerical Simulation of Pervious Concrete Based on Random Pore Model

“…Pore area mm 2 � Pore area pixel 2 • 100 × 100 mm 2 1000 × 1000 pixel 2 , To facilitate the description of the pore morphology, the pores are simplified to a circular and an elliptical shape as described by the equivalent diameter and roundness, respectively. e equivalent diameter (D e ) of a single pore is calculated as follows:…”

“…ey found that there is a close correlation between porosity, permeability, and mechanical properties of pervious concrete. In the studies of Debnath and Sarkar [1] and Tang et al [2], they found that the presence of fine aggregates hindered the formation of pores, and the single size aggregate could increase the permeability. e porosity and pore features of pervious concrete are important to the permeability and mechanical properties [3]; thus, porosity ranging from 15% to 25% was recommended [4].…”

“…ere are two main methods to determine the pore structure of pervious concrete. One is to use the nondestructive test method by combining tomography and digital image processing [2,3,[8][9][10][11]. Many researchers used this method to extract and analyze the pore characteristics of pervious concrete.…”

Influences of different stone powders on pervious concrete strength

“…Generally, this type of concrete has mechanical strengths, including compressive, flexural, and splitting tensile strengths which are less than that of the normal concrete, because of the absence of fine aggregate and large voids. This leads to boost porosity and limits the application of pervious concrete 11–16 …”