136 



COMMITTEE SPECIFICATIONS FOR CONCRETE IN MARINE CONSTRUCTION 



Prepared by H. E. SyriRE 

 Approved by the Cnmiuitlee, 1922 . , 



SECTION A 

 Materials 



1. Materials for the work shall consist of requisite amounts of Portland cement 

 (all of which will be furnished to the Contractor by the Owner), fine aggregate, coarse 

 aggregate, mixing water, reinforcing steel and asphaltic coating. 



2. Tcstiiiii and I lis peel ion. All materials shall be dcli\ered on the work, or sub- 

 mitted as samples when so directed, in ample time to permit inspection in order that 

 they may be tested and the proper directions given for their use. 



3. Cement. Portland Cement shall conform to the "Standard Specifications for 

 Portland Cement" (Serial Designation C 9-21) of the American Society for Testing 

 Materials unless otherwise authorized. Cement will be furnished to the Contractor 

 by the Owner. The Contractor shall haul, unload and store the cement in a tight shed 

 to be constructed by him on or near the work, and shall be responsible for the proper 

 care of the cement and for the return of all empt\- sacks in as good condition as when 

 delivered to him. The Contractor shall pay for all cement which is damaged or stolen 

 after being deli\-ered to him and for all empty sacks rejected for damage. 



4. Fine Aiit^reoate. The fine aggregate shall be clean ri\-er or beach sand containing 

 not more than three (3) per cent of loam, mica or organic matter. It shall range in 

 size from fine to coarse within the following limits: 



Passing No. 4 sieve — not less than 95 per cent. 



Passing No. 50 sieve — not more than 30 per cent. 



If necessary, grading shall be obtained by mixing fine and coarse sand. 



5. Coarse As.nreg,ate. The coarse aggregate shall consist of crushed rock or gravel 

 or combinations thereof, having clean, hard, strong, uncoated particles free from 

 injurious amounts of soft, friable, elongated or laminated pieces, shale, organic or 

 other deleterious matter. 



Coarse aggregate shall range in size from fine to coarse within the following limits: 



Passing l}2-iiich sieve — 100 per cent. 



Passing ^-inch sieve — from 40 per cent to 75 per cent. 



Passing No. 4 sieve — not more than 10 per cent. 



Passing No. 10 sieve — not more than 2 per cent. 



If necessary, grading shall be obtained by mixing two or more screened aggregates. 



6. Waler. Water for concrete shall be clean, fresh and free from deleterious 

 substance. 



7. Reinjorring Metal. Metal reinforcement shall be of a quality and character 

 meeting the requirements of the "Standard Specifications for Billet Steel Concrete 

 Reinforcing Bars" (Serial Designation A 15-14) of the American Society for Testing 

 Materials, "Structural steel grade," except that the jirovisions for machining deformed 

 bars before testing shall be eliminated. 



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