Utilization of heavy oil fly ash to produce controlled low strength material for backfilling applications
AssigneesSaudi Arabian Oil Company, King Fahd University of Petroleum and Minerals
InventorsZakariya Saleh Al-Helal, Carlos Ernesto Acero, Salah Al-Dulaijan, Muhammad Kalimur Rahman, Mohammed Ibrahim
Life of this patent
Estimating the term…
Abstract
A controlled low strength material has constituents that include a cement, an aggregate, a heavy oil fly ash, and a water. The controlled low strength material has a compressive strength in a range of 300 kPa to 2.1 MPa. In certain embodiments, the heavy oil fly ash can be part of a heavy oil fly ash slurry.
Claims16
A controlled low strength material, constituents of the controlled low strength material including:
- a cement in an amount of 2 wt % to 5 wt % of the constituents of the controlled low strength material;
- an aggregate in an amount of 75 wt % to 95 wt % of the constituents of the controlled low strength material;
- a heavy oil fly ash in an amount of 10 wt % to 50 wt % of the cement;
- and
- a water in an amount of 10 wt % to 15 wt % of the constituents of the controlled low strength material, each based on a weight of the controlled low strength material;
- where
- the controlled low strength material has a compressive strength that does not exceed 2.1 MPa, measured at 28 days.
A method for forming a controlled low strength material, the method including:
- mixing together constituents that include:
- a cement in an amount of 2 wt % to 5 wt % of the constituents of the controlled low strength material;
- an aggregate in an amount of 75 wt % to 95 wt % of the constituents of the controlled low strength material;
- a heavy oil fly ash in an amount of 10 wt % to 50 wt % of the cement;
- and
- a water in an amount of 10 wt % to 15 wt % of the constituents of the controlled low strength material;
- where
- after mixing, the controlled low strength material has a compressive strength that does not exceed 2.1 MPa, measured at 28 days.
A method for forming a controlled low strength material, the method including mixing together constituents that include:
- a cement;
- an aggregate;
- a heavy oil fly ash slurry;
- and
- a mixing water;
- where
- the heavy oil fly ash slurry includes a slurry water and a heavy oil fly ash, and where the slurry water and the mixing water together are in an amount of 10 wt % to 20 wt % of the constituents of the controlled low strength material;
- and
- after mixing, the controlled low strength material has a compressive strength that does not exceed 2.1 MPa, measured at 28 days.
Dependencies are inferred from the claim text.