Building Code of the Philippines(1)

Upon no greater degree of end restraint than this

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Unformatted text preview: ............................................... Portland Puzzolan Cement................................................................. AGGREGATES C150 or C175 C205 C340 Concrete............................................................................................. Lightweight, for Structural Concrete................................................. C33 C330 METAL REINFORCEMENT Steel Bars............................................................................................ Prestressed Steel Strand...................................................................... Prestressed Steel Wire......................................................................... Steel Bar Mats..................................................................................... Welded Steel Wire Fabric.................................................................... A615 A416 A421 A184 A185 ADMIXTURES Admixtures........................................................................................... C260 CONCRETE COMPRESSION AND FLEXURE TEST SPECIMENS Making and Curing - in the Field......................................................... Test for Compressive Strength............................................................ Making and Curing - in the Laboratory................................................ Splitting Tensile Strength..................................................................... C31 C39 C192 C496 READY-MIXED CONCRETE........................................................................ C94 (b) Portland Cement. Portland shall conform to ASTM C150. If provisions are made for sufficient damp curing of the concrete in the structure to develop a compressive stength at least equal to that of concrete containing cement conforming to the first paragraph, portland type cements which conform to the following standards may be used: ASTM C205 or C340. (c) Concrete Aggregate. Concrete aggregate shall conform to ASTM specification C33 or C330, except that aggregates failing to meet these specifications but which have been shown by special test or actual service to produce concrete of adequate strength and durability may be used under Section 5.04 (c), Method 2, where authorized by the Engineer. Except as permitted elsewhere in this Chapter, the maximum size of the aggregate shall be not lesser than one-fifth of the narrowest dimension between sides of the forms of the member of which the concrete is to be used nor larger than three-fourths of the minimum clear spacing between individual reinforcing bars or bundles or bars. (d) Water. Water used in mixing concrete shall be clean and free from injurious amounts of oils, acids, alkalis, salts, organic materials, or other substances that may be deleterious to concrete or steel. Mortar cubes made with nonpotable mixing water shall have 7-day and 28-day strengths equal to at least 90 per cent of the strenths of similar speciments made with potable water. (e) Metal Reinforcement. Reinforc...
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