CHAPTER XL. 

 SPECIFICATIONS FOR PORTLAND CEMENT. 



VARIOUS specifications for Portland cement have been collected for 

 insertion in the present chapter. These are of interest partly for com- 

 parison and partly to show the growth of intelligent treatment of this 

 subject. The specifications of the American Society for Testing Ma- 

 terials will, it is probable, become the standard in this country. 



New York State Canals, 1896. 



The mortar and grout will be made of the best quality of Portland 

 or natural hydraulic cement, as may be directed, and clean, sharp sand, 

 in such proportions and made and used in such manner as may be re- 

 quired by the engineer. 



No cement shall be used in any part of the masonry until the State 

 engineer shall have examined, tried, and approved the same. It must 

 be delivered in tight casks or bags, as the division or resident engineer 

 may direct, and thereafter be properly protected from the weather. 



The engineer to direct in what manner the sand shall be screened 

 and worked, and washed, if necessary. When considered necessary 

 by the engineer, salt shall be used with the mortar in such manner and 

 proportions as he may direct. 



Special directions shall be given by the engineer as to the delivery 

 of cement and as to the time and facilities required for testing it previous 

 to its use in the work. No cement will be used except in compliance 

 with these directions. All facilities required by the engineer for securing 

 tests must be afforded by the contractor. All cement must be stored 

 in substantial water-proof structures from the time of delivery till used. 



All cement offered for use in any work will be sampled by an agent 

 of the State Engineer's Department. Samples will be collected immedi- 

 ately on delivery of cement at site of work, and contractors will promptly 

 notify the engineer of the receipt of cement, in order that no delay may 

 be had in the sampling thereof. All samples will be forwarded to the 



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