Study on Compressive Strength and Water Permeability of Steel Slag-Fly Ash Mixed Permeable Brick

Abstract

In order to reduce stormwater runoff, permeable brick was prepared by compounding with fly ash and steel slag as the main substrate. The study found that the amount of steel slag has a significant influence on the compressive strength of permeable brick. When the proportion of steel slag is 6.5%, the compressive strength of permeable brick after 28 days curing can reach 26.32 MPa. The strength of permeable brick decreases with the increase of fly ash content, but the permeability coefficient increases significantly. The results show that the compressive strength and permeability coefficient of permeable bricks can reach a good level when the composite ratio of steel slag is 6%, fly ash is 30%, and the design target of porosity is 20%.

Development and Mechanical Testing of Porous-Lightweight Geopolymer Mortar

“…The developed concrete with 30% or less porosity can be directly used for pavements for light traffic complying with the standard ASTM C902-15, which restricts the minimum compressive strength to 17.2 MPa in a less severe environment [34]. There has recently been a lot of work done on the development and mechanical testing of porous concrete [35,36]. The need for porous pavements is justified in urban areas due to the fact of absorbing rainwater into the soil, reducing burden onto the sewerage systems, retentions of pollutants, avoiding pollutants to mix with groundwater bank, and drivers safety [36,37].…”

Development and Mechanical Testing of Porous-Lightweight Geopolymer Mortar

“…The developed concrete with 30% or less porosity can be directly used for pavements for light traffic complying with the standard ASTM C902 -15, which restricts the minimum compressive strength to 17.2 MPa in a less severe environment [31]. There has recently been a lot of work done on the development and mechanical testing of porous concrete [32,33]. The need for porous pavements is justified in urban areas due to the fact of absorbing rainwater into the soil, reducing burden onto the sewerage systems, retentions of pollutants, avoiding pollutants to mix with groundwater bank, and drivers safety [33,34].…”

Permeable Brick Material and Process Selection Based on Sponge City Construction

“…Yan Liu, Rajendra Prasad Singh [17] and other scholars used steel slag and fly ash as the main raw materials to prepare permeable bricks. The study found that the amount of steel slag and fly ash have a significant effect on the compressive strength and permeability coefficient of the permeable brick.…”