Property characterization of paving blocks using calcined coffee husk ash as partial replacement to cement / Chanel J. Del Rosario, Karla A. Flores, Isaiah Gabriel S. Huliganga, Angel Marie C. Jimenez, Ferdinand B. San Luis, and Erice Jade A. Sarabia .--

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Del Rosario, Chanel J [author ]

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TextPublication details: Manila: Technological University of the Philippines, 2024.Description: xviii, 111pages: 29cmContent type:

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BTH TA 145 D45 2024

Dissertation note: College of Engineering .-- Bachelor of Science in Civil Engineering; Technological University of the Philippines, 2024. Summary: The production of cement requires a significant amount of natural resources and energy, contributing to resource depletion and increased CO₂ emissions, which aggravate global warming and climate change. Simultaneously, the accumulation of agricultural waste, such as coffee husks, adds to environmental pollution. This study investigates the potential use of calcined robusta coffee husk ash (CHA) as a partial replacement for ordinary Portland cement (OPC) in paving block production. Coffee husks were calcined at 600°C for 3 hours using a muffle furnace. Paving blocks were produced with varying CHA replacement levels (0%, 5%, 10%, 15%, and 20% by volume) and molded into 200 mm × 100 mm × 60 mm blocks. A total of 120 specimens were tested after curing periods of 7, 14, and 28 days to evaluate their physical properties (density and water absorption) and mechanical properties (compressive strength, flexural strength, and skid resistance) following respective standards. The results revealed that paving blocks with 5% CHA replacement demonstrated best performance, meeting the standards for compressive strength, flexural strength, and skid resistance, making it the most suitable mix design for this study. Keywords: coffee husk ash, calcination, paving blocks, compressive strength, flexural strength, skid resistance

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Item type	Current library	Shelving location	Call number	Copy number	Status	Notes	Date due	Barcode
Bachelor's Thesis COE	TUP Manila Library	Thesis Section-2nd floor	BTH TA 145 D45 2024 (Browse shelf(Opens below))	c.1.	Not for loan	For library use only		BTH0005729

Bachelor's thesis

College of Engineering .-- Bachelor of Science in Civil Engineering; Technological University of the Philippines, 2024.

Includes bibliographic references and index.

The production of cement requires a significant amount of natural resources and energy, contributing to resource depletion and increased CO₂ emissions, which aggravate global warming and climate change. Simultaneously, the accumulation of agricultural waste, such as coffee husks, adds to environmental pollution. This study investigates the potential use of calcined robusta coffee husk ash (CHA) as a partial replacement for ordinary Portland cement (OPC) in paving block production. Coffee husks were calcined at 600°C for 3 hours using a muffle furnace. Paving blocks were produced with varying CHA replacement levels (0%, 5%, 10%, 15%, and 20% by volume) and molded into 200 mm × 100 mm × 60 mm blocks. A total of 120 specimens were tested after curing periods of 7, 14, and 28 days to evaluate their physical properties (density and water absorption) and mechanical properties (compressive strength, flexural strength, and skid resistance) following respective standards. The results revealed that paving blocks with 5% CHA replacement demonstrated best performance, meeting the standards for compressive strength, flexural strength, and skid resistance, making it the most suitable mix design for this study.

Keywords: coffee husk ash, calcination, paving blocks, compressive strength, flexural strength, skid resistance

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