Abstract
This research goal is the adding of pozzolana as rough aggregate in concrete. Pozzolans of Jabl Onyzh have been described as the major supply from Jordan. It is often used in the place of a conservative aggregate in frivolous concrete. A practical examination was carried out on the resistance of Pozzolana Lightweight Concrete (PLWC) with diverse ratios (35 and 50%) of pozzolana from the whole size of admixture order to ascertain its impact. In this study, a design mix was used with several A mix design was determined through various experimental mixtures to make certain that the pozzolanas lightweight concrete will be able to attain the needed fundamental performance. A self-fabricated was used to simulate a low-velocity projectile effect on the slab specimens was aroused with the use of a self-invented drop-weight impact test rig. Twofold factors were examined to determine the impact resistance on slab (300×300 mm) with diverse viscosity (20, 25 and 30 mm) support, with pozzolana content and concrete thickness. The impact resistance of concrete decreases with the addition of pozzolana but progresses with slab thickness. However, the influence is more prominent for the final crack resistance than for the first crack resistance. When slab thicknesses were compared with each other, the outcome was that 25 cm has a general superior performance in lightweight concrete for impact resistance.
Highlights
Several economic and structural benefits have been derived from the establishment of lightweight concrete
The magnitude of the aggregate gradation of the pozzolana was not as much as 10 mm which performed for the pozzolana in order to guarantee the worth of the mix design. 0.5 equal was fixed ratio of the Water-to-Cement (W/C); the content of the cement is 320 kg/m3, but 0.8% is the superplasticizer of the weight of the content of the cement, while pozzolana of 35 and 50%; of the entire size was included as aggregate substitute in the mix design (Table 1)
The amount of blows was not much different, but still indicated a pattern that specimens with lower than 35% Pozzolana Lightweight Concrete (PLWC) content needed the maximum amount of blows to start the first crack when in comparison to the specimens that had greater than 50% PLWC content
Summary
Several economic and structural benefits have been derived from the establishment of lightweight concrete. Ash and calcined clay have been in use as far back as 2000 BC but in earlier use compared to other cultures. Several people such as the Roman, Greek, Indian and Egyptian pozzolan concrete structures are still available until and this confirms their strength and stability. The first time that the North America started experiencing natural pozzolans can be traced to early 20th century civic works projects, like dams and it was meant for increases of temperature regulating in mass concrete and gives cementitious material. Apart from regulating the increases of the temperature, natural pozzolans helped for enhancing resistance to sulfate attacks and was regarded as one of the foremost materials to be found to mitigate alkali-silica reaction
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