Utilization of mineral sequestration for CO2capturing in car parks and tunnels

Abstract EN

Decreasing the emissions of CO2that come from vehicle exhaust, especially in car parking and tunnels, is so vital.

CO2emissions cause corrosion to a reinforcement of concrete.

Thus, there is a need to provide a layer that protects thereinforcement from the reach of this harmful gas.

This work goals to investigate the efficiency of using board units from Pozzolime concrete and pervious concrete to sequestrate CO2from the environment and then to convert it into calcium carbonate inside the concrete.

The units havedimensions of (200×400×40±5).

All specimens were cured in a water tank after about 48 hours after casting.

Then paint the sample from all surfaces(three layers) excluding the top surface.

The pervious concrete and Pozzolime specimens, at age of 28 days, were put inthe chamber, then the gas was supplied to the chamber with concentrations of 15% , 25% , and 50 % , for 24 hours.

The efficiency was evaluated through carbonation depth, CO2-uptake, and weight change.

The results showed that the maximum CO2uptake wasrecorded at the age of 28 days for Pozzolime concrete when exposed to 50% of CO2 cause corrosion to a reinforcement of concrete.

Thus, there is a need to provide a layer that protects thereinforcement from the reach of this harmful gas.

This work goals to investigate the efficiency of using board units from Pozzolime concrete and pervious concrete to sequestrate CO2from the environment and then to convert it into calcium carbonate inside the concrete.

The units havedimensions of (200×400×40±5).

All specimens were cured in a water tank after about 48 hours after casting.

Then paint the sample from all surfaces(three layers) excluding the top surface.

The pervious concrete and Pozzolime specimens, at age of 28 days, were put inthe chamber, then the gas was supplied to the chamber with concentrations of 15% , 25% , and 50 % , for 24 hours.

The efficiency was evaluated through carbonation depth, CO2-uptake, and weight change.

The results showed that the maximum CO2uptake wasrecorded at the age of 28 days for Pozzolime concrete when exposed to 50% of CO2 concentration