Abstract
In this study, the possibility of using corn cobs as an organic aggregate in producing lightweight concrete has been investigated. First, some important physical properties of corn cob have been determined in the laboratory. These properties are as follows: weight to volume ratio (unit weight), water absorption rate and granulometric analysis. Later on, 4 concrete mixtures have been prepared according to the workability of concrete and standards specified in Turkey. After that, unit weight, heat transmissibility coefficient and 28-day pressure strength of these 4 concrete samples have been determined using machines measuring these properties. The 28-day pressure endurance value has been found between 1.4 - 56.25 kgf/cm2, heat transmissibility coefficient has been found between 0.19 - 0.35 Kcal/m∙h∙˚C and unit weight of samples have been found between 800 - 1520 kg/m3. Lastly, these properties of concrete samples have been compared with other lightweight materials being used in the construction of buildings.
Highlights
Our country, Turkey has got a great corn production capacity in relation to land, water and climate conditions
The 28-day pressure endurance value has been found between 1.4 - 56.25 kgf/cm2, heat transmissibility coefficient has been found between 0.19 - 0.35 Kcal/m∙h∙ ̊C and unit weight of samples have been found between 800 - 1520 kg/m3
Unit weight of unground corn cob has been found as 0.57 gr/cm3 according to Formula (1)
Summary
Turkey has got a great corn production capacity in relation to land, water and climate conditions. The yearly corn production area of Turkey is 575,000 hectares and mean year of corn is 3900 kg/ha. The greatest corn producing provinces are as follows; Samsun, Trabzon, Rize, Kocaeli, Ordu, Bursa, Tekirdağ and Edirne [1]. Corn that if left after graule corns are separated is called corn-cob and there is an abundant quantity of corn cob in our country. That’s why we intended to use this corn cob in using light weight concrete.
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