US 12,275,674 B2
Basaltic lava for producing green controlled low strength material (CLSM)
Muhammed Kalimur Rahman, Dhahran (SA); Mohammed Ibrahim, Dhahran (SA); Mohammed Salihu Barry, Thoqbah (SA); Syed Khaja Najamuddin, Al Khobar (SA); Zakariya Saleh Al-Helal, Dhahran (SA); and Carlos Acero, Dhahran (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. 17/862,181.
Prior Publication US 2024/0010556 A1, Jan. 11, 2024
Int. Cl. C04B 7/02 (2006.01); C04B 7/34 (2006.01); C04B 14/06 (2006.01); C04B 111/00 (2006.01)
CPC C04B 7/34 (2013.01) [C04B 7/02 (2013.01); C04B 14/06 (2013.01); C04B 2111/00017 (2013.01); C04B 2201/50 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A controlled low strength material (CLSM) having reduced environmental impact, the CLSM comprising:
a first fine aggregate comprising sand;
a second fine aggregate comprising limestone, wherein the second fine aggregate is sized between 2.38 mm and 4.75 mm;
a water; and
a cementitious material, wherein the cementitious material comprises ordinary Portland cement (OPC) and powdered basaltic lava;
wherein the ratio of OPC to powdered basaltic lava is in the range of 1:3 to 1:9, wherein the ratio of OPC to powdered basaltic lava is selected to produce a compressive strength equal to or below a target compressive strength, wherein the target compressive strength is a 28 day compressive strength of 8.3 MPa,
wherein the powdered basaltic lava has a composition comprising between 35 to 45 wt % SiO2 and between 6 to 17 wt % CaO,
wherein the controlled low strength material is in the absence of fly ash,
wherein the CLSM comprises between 10.5 wt % powdered basaltic lava and 14.5 wt % powdered basaltic lava.