Location
Cork Institute of Technology, Cork, Ireland
Event Website
https://event.ceri2020.exordo.com/
Start Date
28-8-2020 10:30 AM
End Date
28-8-2020 11:45 AM
Description
Self-compacting concrete (SCC) flows under its own weight without requiring external vibration for compaction. This is very useful in applications where normal vibrated concrete cannot be used such as narrow forms and reinforcement congested members. To attain the self-compacting property, it is required that the concrete have adequate viscosity, high deformability and high resistance to segregation. This is can be achieved by adding mineral admixtures (fillers) and/or viscosity modifying agents (VMAs). The former is the main practice in Europe and processed limestone powder is the most commonly used filler in the production of SCC. However, the quarrying process of the production of mineral aggregate results in large amount of fine materials (quarry dust) as a by-product. These significant amounts of environmental wastes pose a real concern to manufacturers due to their impact on the environment, leading to economic consequences. Dolomite powder, locally available from dolomitic quarry dust, can be utilised as an alternative material for the production of SCC. This paper, therefore, investigates the fresh properties of cement grout using dolomite powder as a cement replacement compared to limestone powder. Preliminary characterisation of the dolomitic powder as well as the workability, flowability, cohesion and strength of the grout were examined to understand the influence of using the dolomite powder on these properties. XRD, TGA and particle size distribution of the dolomite powder were conducted to understand the physical and chemical properties of the filler. Mixes containing 0-20% of dolomite powder and limestone powder were prepared. Mini slump, Marsh cone and Lombardi plate were used to observe the fresh properties of grout containing these powders, while compressive strength will be measured for all hardened samples at 7 and 28 days.
Recommended Citation
Abdalqader, Ahmed; Wilson, Katrina; Thornton, Neil; McHugh, Kieran; Sonebi, Mohammed; and Taylor, Su, "Preliminary Investigation on The Use of Dolomitic Quarry By-Product Powders in Grout For Self-Compacting Concrete Applications" (2020). Civil Engineering Research in Ireland 2020. 4.
https://sword.cit.ie/ceri/2020/6/4
Included in
Civil Engineering Commons, Construction Engineering and Management Commons, Environmental Engineering Commons, Geotechnical Engineering Commons, Hydraulic Engineering Commons, Structural Engineering Commons, Transportation Engineering Commons
Preliminary Investigation on The Use of Dolomitic Quarry By-Product Powders in Grout For Self-Compacting Concrete Applications
Cork Institute of Technology, Cork, Ireland
Self-compacting concrete (SCC) flows under its own weight without requiring external vibration for compaction. This is very useful in applications where normal vibrated concrete cannot be used such as narrow forms and reinforcement congested members. To attain the self-compacting property, it is required that the concrete have adequate viscosity, high deformability and high resistance to segregation. This is can be achieved by adding mineral admixtures (fillers) and/or viscosity modifying agents (VMAs). The former is the main practice in Europe and processed limestone powder is the most commonly used filler in the production of SCC. However, the quarrying process of the production of mineral aggregate results in large amount of fine materials (quarry dust) as a by-product. These significant amounts of environmental wastes pose a real concern to manufacturers due to their impact on the environment, leading to economic consequences. Dolomite powder, locally available from dolomitic quarry dust, can be utilised as an alternative material for the production of SCC. This paper, therefore, investigates the fresh properties of cement grout using dolomite powder as a cement replacement compared to limestone powder. Preliminary characterisation of the dolomitic powder as well as the workability, flowability, cohesion and strength of the grout were examined to understand the influence of using the dolomite powder on these properties. XRD, TGA and particle size distribution of the dolomite powder were conducted to understand the physical and chemical properties of the filler. Mixes containing 0-20% of dolomite powder and limestone powder were prepared. Mini slump, Marsh cone and Lombardi plate were used to observe the fresh properties of grout containing these powders, while compressive strength will be measured for all hardened samples at 7 and 28 days.
https://sword.cit.ie/ceri/2020/6/4
