King Fahd University of Petroleum and Minerals

Salah Uthman Al-Dulaijan

Mohammed Maslehuddin

Mohammed Rizwan Ali

Shaik Inayath Basha

Jobin Jose

Mahmoud Nasr

Mohammed Shameem

Tawfik Abdo Saleh

Shamsad Ahmad

Anas Alkhatib

Ibrahim Nabil Ali Al-duais

Osama Ghanem Rashed Massarweh

Mohammad Al-osta

A cement composition includes a curable component in an amount of 10 to 25 wt. %; a fine aggregate (FA) in an amount of 20 to 40 wt. %; a coarse aggregate (CA) in an amount of 40 to 50 wt. %; and an alkaline component in an amount of 5 to 15 wt. %, each wt. % based on the total weight of the cement composition. The curable component includes a cementitious material having an average particle size (D) of 10 to 17 micrometers (μm), a limestone powder (LSP) material having a Dof 13 to 19 μm, a red mud (RM) material having a Dof 30 to 36 μm, a silicomanganese fume (SMF) material having a Dof 28 to 34 μm, and a natural pozzolan (NP) material having a Dof 13 to 19 μm.

Alkali-activated cement composition

Oil ash comprising carbon in an amount in the range of 60% to 89% is an effective set retarder in a cement composition. The oil ash prolonged the initial and final setting time of cement paste and retained the slump flow in concrete for a longer time than concrete without the retarder. Also, the addition of oil ash to cement marginally improved the compressive strength of concrete. The advantage of oil ash is that it can be used as a solid retarder of cement hydration to substitute for the conventional commercial retarding admixtures with a limited shelf-life.

Cement composition containing an oil ash set retarder

A method of making a structural lightweight and thermal insulating concrete is described. The concrete has a coarse aggregate partly replaced by recycled plastic pieces. This enables the concrete to maintain a high compressive strength, low thermal conductivity, and low weight, while providing a use for waste plastic. The waste plastic pieces may comprise polyethylene in the form of flakes, fibers, or granules. Due to its low unit weight, adequate compressive strength and high thermal resistance the developed concrete can be used as a structural lightweight and thermal insulating concrete. The use of this concrete leads to economic and environmental benefits.

Method for forming lightweight concrete containing waste plastic

Concrete compositions containing cement, a fine aggregate such as sand, a coarse aggregate such as crushed limestone, an industrial waste material such as electric arc furnace dust, cement kiln dust, oil ash, or limestone powder. High performance concretes made therefrom and methods of producing such concretes are also specified. The addition of industrial waste materials and nano silica provides enhanced mechanical strength (e.g. compressive strength, flexural strength) and improved durability (e.g. resistance to penetration of chloride ions) to the high performance concretes.

High performance concretes and methods of making thereof

Method for recycling waste plastic into concrete

Structural lightweight concrete comprising waste plastics

A structural lightweight concrete composition comprising cement, a fine aggregate such as sand, a natural coarse aggregates, such as limestone, scoria or perlite or mixtures thereof, a synthetic coarse aggregate comprising a polymeric material, such as polypropylene beads, an industrial waste byproduct in the form of fine particles, such as silica fume or heavy oil ash, a superplasticizer, such as a polycarboxylate ether and water demonstrating lower thermal conductivity and sufficient compressive strength. Concrete products made therefrom and methods for producing such products are also provided.

Lightweight concrete composition containing perlite and resin beads

Casting method for making a lightweight concrete product

Structural lightweight concrete with superior thermal insulation

Growing community of inventors

Dhahran, Saudi Arabia

Salah Uthman Al-Dulaijan