000			04211nam a22003377a 4500
003			OSt
005			20250626140721.0
008			250626b |||||||| |||| 00| 0 eng d
040			_aTUPM _bEnglish _cTUPM _dTUPM _erda
050			_aBTH TA 145 _bC33 2023
100			_aCabrera, Mel Patricia M. _eauthor
245			_aEffects of lime water-saturated pumice aggregate for internal curing on the physical and mechanical properties of concrete/ _cMel Patricia M. Cabrera, Kenneth Luis T. Dandal, Jhon Oliver A. De Jose, Romelito T. Dela Cruz, Fumie E. Komori, and Mierell Louise V. Ramos.--
260			_aManila: _bTechnological University of the Philippines, _c2023.
300			_axvi, 253pages: _c29cm.
336			_2rdacontent
337			_2rdamedia
338			_2rdacarrier
500			_aBachelor's Thesis
502			_aCollege of Engineering.-- _bBachelor of science in civil engineering: _cTechnological University of the Philippines, _d2023.
504			_aIncludes bibliographic references and index.
520			_aIn the concrete industry, external curing with the addition of lime is the most common method to develop concrete properties and prevent calcium carbonate from leaching out of the concrete. However, external water could not penetrate through the hardened concrete, leading to premature hydration which is essential to the strength development of concrete. To maintain satisfactory temperature and moisture condition, internal curing is an advanced method to provide internal water reservoirs in a concrete mixture that prolongs cement hydration. The researchers aim to investigate the effects on the physical and mechanical properties of concrete using lime water-saturated pumice for internal curing. This study aims to determine the implications of using different concentrations of lime water for internal curing on the properties of concrete and to compare it to the conventional method of internal curing using clean water. This study adapted the ACI 211.1-91 (Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete) to generate three different concrete mix designs and then manipulated using the Bentz and Snyder Equation to calculate the amount of water and fine pumice aggregate for internal curing to create five mix designs with varying lime water concentrations (0%, 20%, 40%, 50%, and 60%). The parameters studied in this experiment are compressive strength with 162 cylindrical samples (100mm dia. by 200mm) based on ASTM C39-M, split-tensile strength with 162 cylindrical samples (100mm dia. by 200mm) based on ASTM C496, and flexural strength with 162 prismatic samples (150mm by 150mm by 500mm) based on ASTM C293 for the mechanical properties of concrete. In addition, concrete density and workability of the concrete were also analyzed using the ASTM C138 and ASTM C143, respectively. Concrete samples vi were tested on the 7th, 14th, and 28th day using the Universal Testing Machine. The results showed slight improvement in the unit weight and workability of concrete. However, there is a significant difference in the mechanical properties of concrete wherein compressive, split-tensile, and flexural strength of internally cured concrete is higher compared to the control sample as the age of concrete progresses. The concrete in terms of its compressive and split tensile strength has similar behavior where strength increases as lime water is introduced using internal curing reaching its peak strength at 50% limewater concentration but slightly decreases as it approaches 60% lime water concentration. While the flexural strength of concrete with lime water internal curing is lower than the normal concrete due to the addition of fine pumice. However, the compressive strength increases as the limewater concentration also increases.
650			_aPhysical properties
650			_aMechanical properties
650			_aLime water
700			_aDandal, Kenneth Luis T. _eauthor
700			_aDe Jose, Jhon Oliver A. _eauthor
700			_aDela Cruz, Romelito T. _eauthor
700			_aKomori, Fumie E. _eauthor
700			_aRamos, Mierell Louise V. _eauthor
942			_2lcc _cBTH COE _n0
999			_c29987 _d29987