000			02945nam a22003377a 4500
003			OSt
005			20230913091616.0
008			230905b |||||||| |||| 00| 0 eng d
040			_aTUPM _beng _c- _erda
050			_aBTH TA 165 _bA46 2019
100			_aAlmeda, Patricia Anne B.
245			_aInfluence of Crushed Oyster Shells as Partial Fine Aggregate Replacement on the properties of Concrete using different types of Portland Cement/ _cPatricia Anne B. Almeda [and five others].
264			_aManila: _bTechnological University of the Philippines, _c2019.
300			_a144 pages ; _c28 cm. _e+1 CD-ROM (4 3/4 in.)
336			_2rdacontent
337			_2rdamedia
338			_2rdacarrier
500			_aThesis (Undergraduate)
502			_aCollege of Engineering-- _bBachelor of Science in Civil Engineering, _cTechnological University of the Philippines, _d2019.
520	3		_aThe increasing volume of oyster shell wastes in the Philippines greatly poses a threat to both humans and the natural environment. The goal of this study is to innovate and recycle these waste products. This study aims to determine the influence of crushed oyster shells as partial fine aggregate replacement on the properties of concrete using Type I Ordinary Portland Cement, Type IP Portland-Pozzolan Cement and Type II Moderate Sulphate Resistance Portland Cement. The fine and coarse aggregates were prepared considering an effective size distribution of 2 mm (No. 10) and 19 mm (3/4 in), 12.7 mm (1/2 in.) and 9.51 mm (3/8 in.), respectively. The oyster shells were cleaned, crushed and sieved with an effective size of 4 mm. The materials used underwent a series of tests to determine its physical properties, namely fineness modulus, relative density (specific gravity), absorption and bulk density (unit weight). The mix designs formulated in this study has a target strength of 20 MPa with varying crushed oyster shells replacement of 0%, 10%, 20% and 30%. The density, compressive strength, split tensile strength and flexural strength were evaluated at 7, 14 and 28 days. Test results showed that the mechanical properties of the concrete developed a directly proportional relationship with curing days and an inversely proportional relationship with the percentage replacement of crushed oyster shells. The highest compressive strength obtained was 25.39 MPa with a 0% crushed oyster shell replacement and a Type IP Portland-Pozzolan Cement with Fly Ash, followed by 22.52 MPa with 0% crushed oyster shell replacement and a Type I Ordinary Portland Cement. _bAuthor's Abstract
650			_aConcrete Replacement _xFine Aggregate
650			_aPortland Cement
653			_aCrushed Oyster Shells
700			_aCasinillo, Wandie F.
700			_aDela Rosa, Bea Kristine T.
700			_aFernando, Joshua D.
700			_aMoreno, Mc Clemen O.
700			_aRoxas, Mark Aaron Melvin L.
942			_2lcc _cBTH COE _n0
999			_c28105 _d28105