Recycled concrete waste powder and aggregates with heavy oil fuel ash for producing a green flowable backfill material
AssigneesSaudi Arabian Oil Company, King Fahd University of Petroleum and Minerals
InventorsCarlos Acero, Muhammed Kalimur Rahman, Zakariya Saleh Al-Helal, Mohammed Ibrahim, Luai Alhems, Mohammed Salihu Barry
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Abstract
Compositions and methods of forming compositions for a controlled low strength material (CLSM) comprising heavy oil fuel ash (HOFA) and recycled concrete powder (RCP) waste with natural and recycled aggregates and water are provided. In some embodiments, small quantities of Portland cement are also utilized. The recycled concrete powder contains primarily calcite and quartz. The CLSM can be used as a flowable compacted fill in structural and non-structural construction applications.
Claims20
A controlled low strength material (CLSM), the CLSM comprising:
- an aggregate, the aggregate is in the range of 40 wt % to 90 wt % of the CLSM weight;
- a water, the water is in the range of 10 wt % to 20 wt % of the CLSM weight;
- and
- cementitious materials, the weight of the cementitious materials are in the range of 2 wt % to 25 wt % of the CLSM weight, wherein the cementitious materials comprise heavy oil fly ash (HOFA) and recycled concrete powder;
- wherein the recycled concrete powder comprises particles less than 0.075 mm.
A method for forming a controlled low strength material (CLSM), the method comprising the step of:
- mixing together constituent materials, the constituent materials comprising:
- an aggregate, the aggregate is in the range of 40 wt % to 90 wt % of the CLSM weight;
- a water, the water is in the range of 10 wt % to 20 wt % of the CLSM weight;
- and
- cementitious materials, the weight of the cementitious materials are in the range of 2 wt % to 25 wt % of the CLSM weight, wherein the cementitious materials comprise heavy oil fly ash (HOFA) and recycled concrete powder;
- wherein the recycled concrete powder comprises particles less than 0.075 mm.
Dependencies are inferred from the claim text.