Utilization of heavy oil ash to produce high quality concrete
AssigneesKing Fahd University of Petroleum and Minerals, Saudi Arabian Oil Company
InventorsMohammed Al-Mehthel, Abdulaziz S. Al-Utaibi, Mohammed Maslehuddin, Mohammed Rizwan Ali
Life of this patent
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Abstract
A concrete mixture that includes aggregates, water and cement can include heavy oil ash instead of or in addition to a portion of the cement. In one embodiment, the heavy oil ash originates from heavy fuel oil burned in a power generation plant. The weight of the heavy oil ash used in the concrete mixture can be from greater than 0 to about 10% of the weight of the cement.
Claims20
A heavy oil ash cement concrete, comprising:
- aggregate;
- heavy oil ash fines, the heavy oil ash fines comprising at least 90% carbon and at least 80% of the heavy oil ash fines being finer than 45 micrometer (#325 sieve), wherein the heavy oil ash fines do not have cementitious properties, and wherein the oil ash fines do not react with lime;
- water;
- and
- cement, the heavy oil ash cement concrete being the result of the mixing of the water and cement in the presence of the heavy oil ash fines and aggregate, the heavy oil ash cement having a cement matrix, the cement matrix defining a plurality of pores, the heavy oil ash fines filling at least a portion of the plurality of pores.
A method of disposing of heavy oil ash, the method comprising the steps of:
- a. providing a predetermined quantity of a cement;
- b. providing a predetermined quantity of water, the predetermined quantity of water being between about 35% and 50% the predetermined quantity of the cement;
- c. preparing a predetermined quantity of heavy oil ash fines, the predetermined quantity of heavy oil ash fines having a weight up to about 10% by weight of a weight of the predetermined quantity of the binder, and the heavy oil ash fines having a carbon content greater than about 90%;
- d. preparing a predetermined quantity of aggregate;
- and
- e. combining the cement, water, aggregate, and heavy oil ash fines such that the cement and water react to create the heavy oil ash cement concrete, the heavy oil ash cement having a cement matrix, the cement matrix defining a plurality of pores, and the heavy oil ash filling at least a portion of the plurality of pores.
A heavy oil ash cement concrete, the heavy oil ash cement concrete comprising:
- water;
- Portland cement;
- aggregate;
- heavy oil ash fines, the heavy oil ash fines comprising heavy oil ash and being substantially free of fly ash and silica fume, the heavy oil ash comprising at least 90% carbon and at least 80% of the heavy oil ash being finer than 45 micrometer (#325 sieve), the heavy oil ash not having cementitious properties and not being reactive with lime;
- and
- the heavy oil ash cement concrete being the result of the mixing of the water and Portland cement in the presence of the heavy oil ash fines and aggregate, the heavy oil ash cement having a cement matrix, the cement matrix defining a plurality of pores, the heavy oil ash fines filling at least a portion of the plurality of pores.
Dependencies are inferred from the claim text.