Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Porcelanite

Electrochemical Characteristics of High-Volume Fly Ash Lightweight Aggregate Concrete Incorporating Hydrated Lime

Tareq S. Al-Attar; Basil S. Al-Shathr; Mahmood E. Mohammed

Engineering and Technology Journal, 2020, Volume 38, Issue 11, Pages 1629-1639
DOI: 10.30684/etj.v38i11A.1550

Currently, the use of high-volume fly ash lightweight concrete, HVFALWC, has acquired popularity as a durable, resource-efficient, and an option of sustainability for varying concrete applications. Electrochemical characteristics such as half- cell potential, AC resistance, chloride penetration, free chloride, and pH value, up to 180 days were investigated for this type of concrete that uses 50% and 60% of fly ash as a replacement of Portland cement. The effect of using 10% hydrated lime powder as a partial substitute for the weight of cementitious materials for HVFALWC on electrochemical properties was also studied. The results in this study showed the possibility of producing friendly environmental structural lightweight concrete by using high volume fly ash (50% and 60%) as partial replacement by weight of cement. Furthermore, using 10% hydrated lime as partial replacement by weight of cementitious materials could be considered as a reliable measure to reduce the effect of chloride ions in the corrosion process

Study the Physical Properties and Thermal Conductivity of Light Weight Refractories Bricks Produced by Adding porcelanite to Kaolinite

Mohammed H. Al-Taie; Alaa H. Ali; Abeer F.Al-Attar

Engineering and Technology Journal, 2015, Volume 33, Issue 1, Pages 51-60

This research was carried out to manufacture porous refractories bricks from locally raw materials (Porcelanite to Dwaikhla Kaolinite clays). The raw materials were tested by Chemical analysis and XRD to find their suitability to produce light weight ceramic refractories. Different percentages of kaolinite were added as binder to Porcelanite (raw materials). The specimens were pressed to dimensions (30×30) mm according to DIN51053 standards using semi-dry method at pressure of (24.5) MPa. After shaped process all specimens left to dry in air for (24hr) then dried at 110°C using electric oven and the specimens were fired at (1200, 1300 and 1400) °C. The fired specimens were tested to determine their physical and thermal properties including bulk density, porosity, water absorption ,specific gravity and thermal conductivity. It also, was observed that the results were within international standards, and local porcelanite and kaolinite could be used as source raw materials for manufacture light weight refractories.