Effectiveness of pinnidae shell as partial substitute to fine aggregates in concrete pavers/ Jan James A. Arca, Luis Anthony L. Fernandez, Mike Kevin Gomez, and Churls Ricky C. Santos.--

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Arca, Jan James A [author]

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BTH TH 438 A73 2024

Dissertation note: College of Industrial Technology.-- Bachelor of engineering technology major in construction technology: Technological University of the Philippines, 2024. Summary: Pinnidae shells are also known as “Tambulog Shells” in most provinces in the Philippines. It shows distinctive mechanical characteristics when compared to mechanical properties and chemical properties, which exhibit flexible valve margins allowing them to withstand shell breakage and facilitate repair mechanisms efficiently. Its fibrous and granular structure raises the possibility of its advantages when added to concrete. The researchers conducted a study that incorporated pinnidae shells into concrete pavers for general uses. Researchers came up with percentages of 0%, 5%, 10%, 15%, and 20% of pulverized pinnidae shells to 1:1.14:1.33 cement:sand: coarse aggregates ratio and 0.37% water content. The size of the concrete paving blocks is 200 x 100 x 60 millimeters, under the ASTM C936 as a standard dimension of concrete blocks. All concrete pavers underwent a series of tests for water absorption and compressive strength with a 28-day curing process. As a result of the testing for mechanical properties, concrete pavers have a compressive strength of 35.24 MPa for Mix Design 1 which has a 0% pulverized pinnidae shell, while 38.91 MPa, 37.22 MPa, 29.78 MPa, and 34.35 MPa for Mix Design 2, 3, 4, and 5. For water absorption test results, it shows that mix design 1 control, has a 9.56% water absorption, while 11.16%, 10.21%, 12.30%, and 9.22% for mix design 2, 3, 4, and 5, which is higher than the ASTM Standard for Water Absorption 5%. The researchers concluded that as the shell contained in CPB increases the compressive strength will decrease, and the higher the shell percentage, it absorbs more water. Pinnidae shell is a viable material for concrete applications, according to the study’s findings, but more investigation and development are required to maximize its viability and performance.

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Holdings
Item type	Current library	Shelving location	Call number	Copy number	Status	Date due	Barcode
Bachelor's Thesis CIT	TUP Manila Library	Thesis Section-2nd floor	BTH TH 438 A73 2024 (Browse shelf(Opens below))	c.1	Not for loan		BTH0005706

Bachelor's thesis

College of Industrial Technology.-- Bachelor of engineering technology major in construction technology: Technological University of the Philippines, 2024.

Includes bibliographic references and index.

Pinnidae shells are also known as “Tambulog Shells” in most provinces in the Philippines.
It shows distinctive mechanical characteristics when compared to mechanical properties
and chemical properties, which exhibit flexible valve margins allowing them to withstand
shell breakage and facilitate repair mechanisms efficiently. Its fibrous and granular
structure raises the possibility of its advantages when added to concrete. The researchers
conducted a study that incorporated pinnidae shells into concrete pavers for general uses.
Researchers came up with percentages of 0%, 5%, 10%, 15%, and 20% of pulverized
pinnidae shells to 1:1.14:1.33 cement:sand: coarse aggregates ratio and 0.37% water
content. The size of the concrete paving blocks is 200 x 100 x 60 millimeters, under the
ASTM C936 as a standard dimension of concrete blocks. All concrete pavers underwent a
series of tests for water absorption and compressive strength with a 28-day curing process.
As a result of the testing for mechanical properties, concrete pavers have a compressive
strength of 35.24 MPa for Mix Design 1 which has a 0% pulverized pinnidae shell, while
38.91 MPa, 37.22 MPa, 29.78 MPa, and 34.35 MPa for Mix Design 2, 3, 4, and 5. For
water absorption test results, it shows that mix design 1 control, has a 9.56% water
absorption, while 11.16%, 10.21%, 12.30%, and 9.22% for mix design 2, 3, 4, and 5, which
is higher than the ASTM Standard for Water Absorption 5%. The researchers concluded
that as the shell contained in CPB increases the compressive strength will decrease, and
the higher the shell percentage, it absorbs more water. Pinnidae shell is a viable material
for concrete applications, according to the study’s findings, but more investigation and
development are required to maximize its viability and performance.

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