STANDARD SPECIFICATIONS 



(6) In making the pats the greatest care should be exercised 

 to avoid initial strains due to molding or to too rapid 

 drying-out during the first twenty-four hours. The 

 pats should be- preserved under the most uniform 

 conditions possible, and rapid changes of temperature 

 should be avoided. 



293. The failure to meet the requirements of the accelerated 

 tests need not be sufficient cause for rejection. The 

 cement may, however, be held for twenty-eight days, 

 and a retest made at the end of that period, using a new 



. sample. Failure to meet the requirements at this time 

 should be considered sufficient cause for rejection, 

 although in the present state of our knowledge it can- 

 not be said that such failure necessarily indicates un- 

 soundness, nor can the cement be considered entirely 

 satisfactory simply because it passes the tests. 



SPECIFICATIONS 



294. General Conditions: 



(a) All cement shall be inspected. 



(b) Cement may be inspected either at the place of manu- 



facture or on the work. 



(c) In order to allow ample time for inspection and testing, 



the cement should be stored in a suitable weather-tight 

 building having the floor properly blocked or raised 

 from the ground. 



(d) The cement shall be stored in such a manner at to permit 



easy access for proper inspection and identification of 

 each shipment. 



(e) Every facility shall be provided by the contractor and 



a period of at least twelve days allowed for the inspec- 

 tion and necessary tests. 



(/) Cement shall be delivered in suitable packages with the 

 brand and name of manufacturer plainly marked 

 thereon. 



{#) A bag of cement shall contain 94 Ibs. of cement net. 

 Each barrel of Portland cement shall contain 4 bags, 

 and each barrel of natural cement shall contain 3 bags 

 of the above net weight. 



