US 12,304,863 B2
Recycled concrete waste powder and aggregates with heavy oil fuel ash for producing a green flowable backfill material
Carlos Acero, Dhahran (SA); Muhammed Kalimur Rahman, Dhahran (SA); Zakariya Saleh Al-Helal, Dhahran (SA); Mohammed Ibrahim, Dhahran (SA); Luai Alhems, Dhahran (SA); and Mohammed Salihu Barry, Thoqbah (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA); and King Fahd University of Petroleum & Minerals, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA); and King Fahd University of Petroleum & Minerals, Dhahran (SA)
Filed on Jul. 11, 2022, as Appl. No. 17/862,206.
Application 17/862,206 is a continuation in part of application No. 16/815,805, filed on Mar. 11, 2020, granted, now 11,434,168.
Prior Publication US 2022/0348498 A1, Nov. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C04B 18/08 (2006.01); C04B 7/02 (2006.01); C04B 18/167 (2023.01)
CPC C04B 18/087 (2013.01) [C04B 7/02 (2013.01); C04B 18/167 (2013.01)] 20 Claims
 
1. 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.