Question & AnswerQ&A (EXECUTIVE ORDER NO. 110)
The purpose of Executive Order No. 110 is to amend Executive Order No. 102, prescribing the specifications for standard Portland cement and high-silica content cement for use in government construction works, in order to ensure durability and economy.
The use of high-silica content cement was recommended by the Director of Public Works and the Secretary of Public Works and Communications.
All Portland cement must conform to the United States Government specification known as Federal Specification for Portland Cement, SS-C-192, dated October 14, 1930, with a modification regarding testing temperature.
The testing temperature is modified from 21 degrees centigrade (70 degrees Fahrenheit) to 27 degrees centigrade (86.8 degrees Fahrenheit) to suit local climatic conditions.
It must be a product obtained by inter-grinding Portland cement clinker with pozzolanic material containing no less than 50% silica, with the pozzolanic material previously dehydrated and calcined at a suitable temperature. Gypsum may be added during grinding.
The limits are: Loss on ignition not to exceed 5.00%, Sulphuric anhydride not to exceed 2.00%, and Magnesia not to exceed 5.00%.
At least 85% must pass through a standard 325-mesh sieve.
The average tensile strength of three standard mortar briquettes must be at least 300 psi after 7 days (1 day in moist air and 6 days in water) and at least 400 psi after 28 days (1 day in moist air and 27 days in water), with no retrogression in strength between 7 and 28 days.
Executive Order No. 75 series of 1912, Executive Order No. 19 series of 1918, and Executive Order No. 367 series of 1932 are repealed.
Manuel L. Quezon signed as President of the Philippines and Elpidio Quirino signed it by the President as Secretary of the Interior.