A mortar mix and a concrete mix incorporate a stillage admixture that improves the workability of fresh concrete and advantageously modifies the properties of the hardened concrete.

A mortar mix and a concrete mix incorporate a stillage admixture that improves the workability of fresh concrete and advantageously modifies the properties of the hardened concrete.

Trona-accelerated composition for backfilling trenches are described. The compositions consist of aggregate (e.g., sand), Portland cement, Trona, water and sometimes air. The compositions may have a compressive strength of between 10 psi and 100 psi after 4 hours, a compressive strength of between 75 psi and 500 psi after 28 days, and a penetration resistance of between 4.5 tsf and 200 tsf after 4 hours. Also disclosed are methods of filling a trench with fast-setting flowable fill.

Trona-accelerated composition for backfilling trenches are described. The compositions consist of aggregate (e.g., sand), Portland cement, Trona, water and sometimes air. The compositions may have a compressive strength of between 10 psi and 100 psi after 4 hours, a compressive strength of between 75 psi and 500 psi after 28 days, and a penetration resistance of between 4.5 tsf and 200 tsf after 4 hours. Also disclosed are methods of filling a trench with fast-setting flowable fill.

The present disclosure relates to organopolysiloxanes, compositions and powder formulations containing the same and uses thereof as a defoamer. The organopolysiloxane contains at least 50 mol % of trifunctional siloxane units and at least one trifunctional siloxane unit has a polyether group. The composition and powder formulation containing the same have excellent anti-foaming and defoaming performances, and can be used as a defoamer in cement-based materials or coatings.

Provided herein are methods and compositions utilizing one or more cementitious replacement materials, one or more alkaline activating materials, and, optionally one or more bonding materials and/or one or more setting time enhancer materials. The one or more cement precursors comprises one or more of non-radioactive nuclear waste; swarf, insoluble hydroxide of carbonate salts, radioactive wastes, petroleum coke, spent solvent wastes, electroporating and other metal finishing wastes, dioxin-bearing wastes, chlorinated aliphatic hydrocarbons production, wood preserving wastes, petroleum refinery wastewater treatment sludges, multisource leachate, organic chemicals manufacturing waste, pesticide manufacturing waste, petroleum refining waste, human pharmaceuticals manufacturing waste; veterinary pharmaceuticals manufacturing waste; inorganic pigment manufacturing waste; inorganic chemicals manufacturing waste; explosives manufacturing waste; iron and/or steel production waste; primary aluminum production waste; secondary lead processing waste; ink formulation waste; coking waste; or a combination thereof. The one or more alkaline activating agents comprises potassium silicate, potassium hydroxide, sodium hydroxide, sodium silicate, calcium hydroxide, magnesium hydroxide, reactive magnesium oxide, calcium chloride, sodium carbonate, silicone dioxide, sodium aluminate, calcium sulfate, sodium sulfate, or dolomite, or a combination thereof. The system comprises a vertical impact mill.

Provided herein are methods and compositions utilizing one or more cementitious replacement materials, one or more alkaline activating materials, and, optionally one or more bonding materials and/or one or more setting time enhancer materials. The one or more cement precursors comprises one or more of non-radioactive nuclear waste; swarf, insoluble hydroxide of carbonate salts, radioactive wastes, petroleum coke, spent solvent wastes, electroporating and other metal finishing wastes, dioxin-bearing wastes, chlorinated aliphatic hydrocarbons production, wood preserving wastes, petroleum refinery wastewater treatment sludges, multisource leachate, organic chemicals manufacturing waste, pesticide manufacturing waste, petroleum refining waste, human pharmaceuticals manufacturing waste; veterinary pharmaceuticals manufacturing waste; inorganic pigment manufacturing waste; inorganic chemicals manufacturing waste; explosives manufacturing waste; iron and/or steel production waste; primary aluminum production waste; secondary lead processing waste; ink formulation waste; coking waste; or a combination thereof. The one or more alkaline activating agents comprises potassium silicate, potassium hydroxide, sodium hydroxide, sodium silicate, calcium hydroxide, magnesium hydroxide, reactive magnesium oxide, calcium chloride, sodium carbonate, silicone dioxide, sodium aluminate, calcium sulfate, sodium sulfate, or dolomite, or a combination thereof. The system comprises a vertical impact mill.

An improved process for the preparation of aggregates for use with mixtures of various carbonatable substances, in particular mixtures comprising pulverised fuel ash and/or steel slag. The mixtures also comprise a carbonatable binder. The process comprises the steps of a. blending a combination of two carbonatable wastes, b. mixing the blended carbonatable waste with a carbonatable binder, c. mixing the blended carbonatable waste and binder with water, and d. carbonating the damp blended carbonatable waste in the presence of carbon dioxide.

This invention repurposes mining waste/gangue materials to produce valuable supplementary cementitious materials, such as pozzolans for concrete applications. A process for producing a supplementary cementitious material from a mine waste material, comprises: obtaining a mine waste material; crushing the mine waste material; milling the crushed mine waste material to enhance pozzolanicity via mechanical activation; optionally, calcining or sintering the crushed mine waste material to generate a calcined/sintered mine waste material that is thermally activated to enhance pozzolanicity; optionally, milling the calcined/sintered mine waste material; and recovering a supplementary cementitious material, which may contain a separate pozzolan added at some point in the process. Experimental results demonstrate the disclosed technology for upcycling mining waste materials in the form of overburden, reject materials, and production byproducts, into supplementary cementitious materials. This discovery provides significant benefits to concrete performance and durability, while also substantially lowering the carbon footprint of the concrete.

A method of forming a multi-use dry pavement from oily waste derived from hydrocarbons has the steps of combining the oily waste with calcium oxide so at as to suspend and homogenize the wastes, adding hydrogen peroxide and water to the oily mixture, and adding ammonium sulfate and water to the mixture. The hydrogen peroxide is mixed with equal amounts of water. The ammonium sulfate is mixed with an equal amount of water. The homogenization process continues until the mixed material forms a granulate. The granulate can be compacted and then used as a pavement.