Some transport properties of high volume metakaolin concrete incorporated wastes of clay brick and plastic

Nowadays, the essential targets in concrete production are achieving sustainab ility and durab ility. One of the most attractive options for more sustainab le concrete is using supplementary cementitious materials (SCMs) and waste materials as substitution for main concrete ingredients. This study aims to evaluate durab ility aspect in relation to some trans it properties of different six concrete mixtures incorporating high volume of metakao lin (MK), brick powder (BP) and waste aggregates of clay brick and plastic. For reference mix, 50% of cement weight had been replaced with a blend of 25% BP and 25%MK. Meanwhile, other five mixtures had been produced where the natural coarse aggregate was substituted by 30% of its volume with different content of crushed brick aggregate (CB) and shredded plastic aggregate (PA). Transit properties of all mixes were tested through ultrasonic pulse velocity (UPV), water absorption and water sorptivity. The results showed that the control mixture of high-vo lume blended MK-BP concrete had excellent quality grade based on the high trans it velocity of ultrasonic pulse which exceed ed 5.11 km/sec, low water absorption of 2.43%, and slow capillary suction with sorptivity index of 0.01337 mm/sec0.5. Moreover, substitution of natural aggregate by 30% of single or combined CB and PA had adversely affected the pulse veloc ity and water absorption of concrete The water sorptivity index has increased for the mixtures with high CB content, while the presence of waste p lastic aggregate has slightly reduced the water sorptivity, especially for the 15% PA content. The outcomes of this paper have shown acceptable durability aspects for this green concrete, which can be applicable in aggressive environment.