King Fahd University of Petroleum and Minerals

Saudi Arabian Oil Company

Mohammed Ibrahim

Mohammed Salihu Barry

Mohammed Maslehuddin

Luai M Alhems

Muhammad Kalimur Rahman

Mohammed Al-Mehthel

Carlos Ernesto Acero

Muhammed Kalimur Rahman

Aftab Ahmad

Saleh H Al-Idi

Megat Azmi Megat Johari

Zakariya Saleh Al-Helal

Alaeddin A Al-Sharif

Hatim Mohamad Dafallah

Zakariya Saleh Al-helal

Bakr Hammad

Mohammed Shameem

Salah Al-Dulaijan

Syed Khaja Najamuddin

Hatim Dafalla Mohamed

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.

Recycled concrete waste powder and aggregates with heavy oil fuel ash for producing a green flowable backfill material

Disclosed is a composition for a Controlled Low Strength Material (CLSM) including cementitious materials, water, and fine aggregate. The cementitious materials include powdered basaltic lava and Ordinary Portland Cement (OPC). In the composition, the basaltic lava replaces some of the ordinary Portland cement in the CLSM as compared to a conventional CLSM. The basaltic lava replaces 25% to 90% of the OPC in a conventional CLSM. The CLSM can be used as a compacted fill for structural and non-structural construction applications.

Basaltic lava for producing green controlled low strength material (CLSM)

A controlled low strength material has constituents that include a cement, an aggregate, and a water. The aggregate includes concrete demolition waste. The controlled low strength material has a compressive strength that does not exceed 8.3 MPa, measured at 28 days. The controlled low strength material can alternately include a heavy oil fuel ash and the controlled low strength material can have a compressive strength that does not exceed 2.10 MPa, measured at 28 days.

Recycled concrete aggregates and heavy oil fuel ash for green controlled low strength material

A green concrete and mortar compositions free of Portland cement are disclosed. The compositions comprise Natural pozzolan, nanosilica particles, and alkaline activator. The green concrete produced from the composition of the invention is cured at ambient temperature and has higher compressive strength than that of concrete made with Portland cement.

Two component green concrete kit

A structural, load-bearing panel useful in constructing multistory buildings may have a panel height, panel width, and panel thickness, and may include a first layer comprising at least 75 wt. % of concrete, relative to a total weight of the first layer; an insulation layer comprising flexible polymer, the insulation layer having a thickness of at least 5 cm; and a second layer comprising at least 75 wt. % concrete, wherein the insulation layer is sandwiched between the first and second layers, and wherein the panel is suitable to be set in any of a planar, curved, and polyhedral cross-sectional shape. Set panels are not flexible, though the flexibility of the insulation layer, particularly of a polyethylene foam, may allow the panel to have a curved, or polyhedral cross-section while still serving as a structural support.

Concrete wall panels with flexible insulation material

A cementitious blend composition and a concrete mix composition preferable for making concrete resistant to high temperatures and alkaline conditions, particularly for making durable concrete for constructing an alumina digester tank in an aluminum smelter. The cementitious blend composition includes at least one hydraulic cement, silica fume (SF), and natural pozzolan (NP), wherein a weight percent ratio of at least one hydraulic cement:SF:NP in the cementitious blend composition lies in the range of (24-63):(5-44):(32-40) with the sum of the weight percentages of the at least one hydraulic cement, the SF, and the NP not exceeding 100%. The concrete mix composition comprises water and the cementitious blend composition, wherein a weight ratio of the water to the cementitious blend composition is 0.2-0.5, and wherein the concrete mix composition has a content of the cementitious blend composition of 400-550 kg/m.

Water cured concrete mix composition

Concrete mix composition

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.

Utilization of heavy oil fly ash to produce controlled low strength material for backfilling applications

Room temperature cured green concrete derived from natural pozzolan and nanosilica

A nanozeolite modified green concrete contains alkali-activated natural pozzolan. Natural pozzolan is a green and sustainable material, potentially useful in green concrete, e.g., to curb greenhouse gas emissions associated with ordinary Portland cement production. Nanozeolite (NZ) is present as an additive to the green concrete, e.g., at 3 to 5 wt. %, of natural pozzolan to improve strength development and microstructural properties, resulting in superior strength and denser microstructure compared to a green concrete without nanozeolite.

Nanozeolite-modified green concrete

Alkali activated concrete compositions containing natural pozzolan, ground granulated blast furnace slag, alkali activators such as an alkali hydroxide and an alkali silicate, and optionally fine and coarse aggregates. Alkali activated concretes made therefrom and methods of making such concretes are also specified. The inclusion of ground granulated blast furnace slag provides significantly superior mechanical strength (e.g. compressive strength) to the alkali activated concretes within 12-24 hours of curing at 30-60&#xb0; C.

Alkali activated natural pozzolan based concrete containing ground granulated blast furnace slag

A lightweight structural concrete formulation comprises a wet mix of about 460 kg/mof cementitious material such as ordinary Portland cement of which about 50 percent has been replaced by ground granulated basic furnace slag (GGBFS) and 7 percent by silica fume (SF) in other words the mix introduces between about 178 and 228 kg/mtherefore the combination is good to produce secondary reaction products when the cement hydrates which produces secondary calcium silicate hydrate (C&#x2014;S&#x2014;H) which makes the structure dense and thereby increases its mechanical durability characteristics of the concrete product. Possible ratios of GGBFS and SF are 30-70 percent and 5-10 percent, respectively. By making the structures dense increases the mechanical and durability characteristics of the concrete product. Other ratios have been made including GGBFS of 30-70 percent and silica fume 5-10 percent, respectively. It can be noted that the silica fume was added to the mixture as a supplementary cementitious material (SCM) not as an aggregate. It should also be noted that the particle sizes of GGBFS ranges between about 20-40 mm and that of silica fume is less than 20 mm.

Lightweight concrete

A composite wall panel comprising a panel frame and an insulating layer disposed therein, and a wall assembly comprising a plurality of the composite wall panels that are vertically jointed to one another. Various embodiments and combinations of embodiments are provided.

Composite wall panel

A calcium aluminate cement protective coating is resistant to sulfuric acid and can be used as a lining to protect surfaces in sulfur storage vessels and sulfuric acid storage vessels. The protective coating can include calcium aluminate cement, calcium aluminate based synthetic aggregates, and water. The protective coating is resistant to sulfur and sulfuric acid attack, and thus can be used to protect surfaces inside sulfur storage pits, sulfur storage tanks, and sulfuric acid storage containers.

Protection system for sulfur storage apparatus

A heavyweight concrete composition comprising cement, steel slag coarse particles, steel slag fine particles, and iron ore aggregate, a wet concrete slurry of water mixed with the heavyweight concrete composition, and a heavyweight concrete which is a cured form of the wet concrete slurry. In the present disclosure, sand, which is used in conventional concretes, is replaced with steel slag fine particles to produce a sand-free heavyweight concrete.

Growing community of inventors

Dhahran, Saudi Arabia

Mohammed Ibrahim