International Journal on Advanced Science, Engineering and Information Technology, Vol. 8 (2018) No. 2, DOI:10.18517/ijaseit.8.2.4340

Effect of Natural Pozzolan on Carbonation and Chloride Penetration in Sustainable Concrete

Khin Su Su Htwe, Yu Pyae Pyo Mon

Abstract

A study on green concrete as well as its durability is important to promote the sustainable development in concrete industry. Since the majority of concrete deterioration is connected to corrosion of reinforcement due to carbonation or chloride penetration into concrete, influence of pozzolan through them must be investigated for concrete durability. This paper mainly focuses on experimental study of influence of Popa volcanic natural pozzolan on carbonation and chloride penetration process. The experimental tests are made on replacement of natural pozzolan 10%, 20%, 30% instead of cement and analysis show that optimized pozzolan replacement can promote on mechanical strength of concrete along with time than reference concrete. According to the results, in the CO2 chamber and in the natural condition, it contributes negatively on carbonation because the rate of carbonation increased as the amount of pozzolan increased. However, increasing the pozzolan content led to higher resistance of the concrete in chloride ion penetration.

Keywords:

Carbonation; chloride penetration; cements; concrete durability; natural pozzolan

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