Non-destructive Testing of Replacing Virgin Aggregates by Recycled Aggregate Concrete Cluster Using Schmidt Rebound Hammer and Ultrasonic Pulse Velocity
Issue:
Volume 11, Issue 2, June 2022
Pages:
30-36
Received:
15 April 2022
Accepted:
29 April 2022
Published:
7 May 2022
DOI:
10.11648/j.am.20221102.11
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Abstract: The Schmidt hammer and Ultrasonic pulse velocity are the main importance to testing hardened concrete structures after the concrete has gain the strengths, which checking is necessary weather the concrete structure is suitable for designed use. Broken concrete and re-sized output are called recycled aggregate concrete cluster (RACC) owing to mix of mortar and aggregate. Lack of information on recycling and reuse of recycled aggregate concrete cluster combined with construction demolition waste. Thus, the main aim of this research was to study the effect of replacement of virgin aggregate (VA) by possible extent inclusion of recycled aggregate concrete cluster with C-30 grade concrete mix design having water to cement ratio 0.435 and slump of 25~100mm at replacement levels of 10%, 20%, 30%, 40% and 50% virgin aggregate by recycled aggregate concrete cluster. Finally, comparison of properties between virgin aggregate and recycled aggregate concrete cluster was recognized to verify the suitability of recycled aggregate concrete cluster to replace virgin aggregate. The results shows that almost at par, else proximate engineering parameter values of recycled aggregate concrete cluster with Virgin aggregate offered momentum for twenty percent objective scope. It is suggested that recycled aggregate concrete cluster recycling needs policy makers’ attention.
Abstract: The Schmidt hammer and Ultrasonic pulse velocity are the main importance to testing hardened concrete structures after the concrete has gain the strengths, which checking is necessary weather the concrete structure is suitable for designed use. Broken concrete and re-sized output are called recycled aggregate concrete cluster (RACC) owing to mix of...
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Structural, Morphological and Biotoxicity Studies of Biosynthesized CaO Nanoparticles Via Cuminum Cyminum
Sumaira Perveiz,
Syeda Mona Hassan,
Shahzad Sharif Mughal,
Alejandro Pando,
Alvina Rafiq,
Nageena Shabbir
Issue:
Volume 11, Issue 2, June 2022
Pages:
37-49
Received:
13 June 2021
Accepted:
5 May 2022
Published:
12 May 2022
DOI:
10.11648/j.am.20221102.12
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Abstract: Nanotechnology is a branch of science and technology concerned with the design and manipulation of materials and devices with at least one longitudinal dimension of 1100 nanometers. Nanotechnology encompasses not only the study and development of nanoscale materials, but also the study and development of structures, devices, and material architectures that have novel properties and functions due to their nanoscale and dimension components. Plant extracts serve as capping agents and stabilisers in the manufacture of CaO nanoparticles, hence the green synthesis approach was chosen. The CaO nanoparticles were studied using SEM, XRD, FTIR, EDX. The existence of active phytoconstituents was validated by a phytochemical study of Cuminumcyminum extract. SEM proved the morphology and monodispersive clusters of CaONPS, while FTIR confirmed the presence of CaONP with defined peaks corresponding to the synthesis of CaO nanoparticles. Following SEM and FTIR, EDS was used to confirm the existence of CaO nanoparticles by displaying the paternity of Ca and O atoms in the form of peaks. The results of the XRD examination were even more conclusive. The current research is cost-effective and can be used to create antifungal reagents in the pharmaceutical and food industries.
Abstract: Nanotechnology is a branch of science and technology concerned with the design and manipulation of materials and devices with at least one longitudinal dimension of 1100 nanometers. Nanotechnology encompasses not only the study and development of nanoscale materials, but also the study and development of structures, devices, and material architectu...
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