عنوان مقاله [English]
The current research examined the effect of air entrainment admixture (AEA) on the water absorption characteristics of concrete used in irrigation canal linings. Six concrete mixtures (treatments) were designed and constructed using at AEA values of 0%, 0.01%, and 0.03% of cement weight for cement contents of 325 and 350 kg/m3. Testing was carried out on fresh and hardened concrete mixtures. The results showed that by increasing the AEA and cement content increased the slump, porosity, and water absorption of the fresh concrete and decreased its gravity. Increasing the AEA at both cement contents from 0.01% to 0.03%, decreased initial and final water absorption and water depth penetration of hardened concrete and increased capillary water absorption. The results confirm that the durability indices of the concrete lining improved significantly with the addition of 0.03% AEA.
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