Question & AnswerQ&A (EXECUTIVE ORDER NO. 110)
The main purpose of Executive Order No. 110 is to amend Executive Order No. 102 and prescribe specifications for standard Portland cement and high-silica content cement to be used in public works by the Government of the Commonwealth of the Philippines to ensure durability and economy.
The President of the Philippines, by virtue of the powers vested by law, has the authority to amend Executive Order No. 102.
All Portland cement purchased by the government must conform with the specifications of the United States Government known as Federal Specification for Portland Cement, SS-C-192, dated October 14, 1930, with a modification for local climatic conditions regarding test temperature.
It substitutes the required test temperature of 21 degrees Celsius (70 degrees Fahrenheit) with 27 degrees Celsius (80.6 degrees Fahrenheit) to meet local climatic conditions.
The high-silica content cement must be obtained by inter-grinding Portland cement clinker with a pozzolanic material containing at least 50% silica, which has been previously dehydrated and calcined at a suitable temperature, with gypsum added before or during grinding.
The maximum limits are: Loss in ignition - 5.00%, Sulphuric anhydride - 2.00%, and Magnesia - 5.00%.
At least 85% of the cement must pass a standard 325-mesh sieve.
The average tensile strength must be at least 300 psi at 7 days and at least 400 psi at 28 days, with no retrogression in strength from 7 to 28 days.
The mortar briquettes should be stored one day in moist air, then six days in water before the 7-day test; and one day in moist air, then 27 days in water before the 28-day test.
Executive Orders No. 75 (series of 1912), No. 19 (series of 1918), and No. 367 (series of 1932) are repealed.
The order was signed by Elpidio Quirino, Secretary of the Interior.