Water Absorption, Sorptivity and Permeability Properties of Concrete Containing Chemical and Mineral Admixtures
1 Akinkurolere, O.O., 2 Awolusi, T.F., 3* Oguntayo, D.O., 4 Babalola, O.E., 3 Aladegboye, O. and 5 Oyejobi, D.O.
1Department of Civil Engineering, Ekiti State University, Ado-Ekiti, Nigeria.
2Department of Civil Engineering. Afe Babalola University, Ado-Ekiti, Nigeria.
3Department of Civil Engineering. Landmark University, Omu-aran, Nigeria.
4Faculty of Civil Engineering. Ton Duc Thang University, Ho Chi Minh, Vietnam.
5Department of Civil Engineering. University of Ilorin, Ilorin, Nigeria.
Concrete durability, especially in water-logged environments might not be possible with conventional constituents of concrete. A combination of mineral and chemical admixtures in different proportions is used to study water absorption, sorptivity, and permeability behavior of concrete. The water absorption, sorptivity, and permeability test were carried out using nine (9) trial mixes of different proportions of Calcined Clay (CC), Sawdust Ash (SDA), Crystalline Based Admixture (CBA), and Superplasticizer (SP). The results showed that treating concrete with 5% CC + 5% SDA+1% CBA combination gives optimum performance in terms of sorptivity with reduced water absorption value of 4.60%. While the permeability coefficient of concrete is reduced when CC and SDA are added to concrete mix separately, the reactivity between their combination (CC and SDA) significantly increased permeability coefficient of the concrete. The study demonstrates that production of concrete with the right proportions of admixture and pozzolanas improve the durability of concrete structures.
Keywords: Concrete, durability, admixture, water absorption, sorptivity, permeability