Abstract:
A manufacturing process of a concrete product includes: (1) extracting calcium from reclaimed solids as portlandite; (2) forming a cementitious slurry including the portlandite; (3) shaping the cementitious slurry into a structural component; and (4) exposing the structural component to carbon dioxide, wherein the portlandite included in the structural component is converted to limestone, thereby forming the concrete product.
Abstract:
A method of cementing a wellbore penetrating a subterranean formation comprises: injecting into the wellbore a cementing composition comprising: a ductility modifying agent comprising one or more of the following: an ionomer; a functionalized carbon; a metallic fiber; or a polymeric fiber; a cementitious material; an aggregate; and an aqueous carrier.
Abstract:
The present invention relates to improved concrete elements, particularly to self-prestressed, high-performance concrete elements (SP-HPC elements); to cementitious compositions suitable, for producing such concrete elements; to methods of manufacturing such concrete elements and such cementitious compositions; to the use of specific components in concrete elements and cementitious mixtures. The compositions and elements described herein comprise an effective amount of expansive agents in combination with superabsorbent polymers (SAP) and shrinkage reducing admixtures (SRA), and optional further components as defined in the claims. The present invention further provides for improved tendons, suitable for SP-HPC elements.
Abstract:
Die Erfindung betrifft eine Verzögerermischung umfassend Natriumgluconat und Alkalihydrogencarbonat, ein alkaliaktiviertes Bindemittel enthaltend Natriumgluconat und Alkalihydrogencarbonat, sowie ein Verfahren zur Einstellung der Festigkeitsentwicklung, bei dem Natriumgluconat und Alkalihydrogencarbonat einem alkaliaktivierten Bindemittel zugesetzt werden.
Abstract:
Disclosed are methods and compositions for plugging in a subterranean formation. An example comprises providing a composition comprising a cementitious material, water, and a swellable glass additive, wherein the swellable glass additive comprises a plurality of interconnected organosilica nanoparticles; and introducing the composition into a subterranean formation.
Abstract:
The water barrier is made starting from an alkaline granular comminuted steel slag material which is mixed with a pozzolanic material that comprises solid particles and with a plasticizing material. By alkaline activation of the pozzolanic material, which comprises preferably glass cullet, a silica-gel is produced filling at least partially the pores of the water barrier to reduce the hydraulic conductivity thereof. Due to the alkaline nature of the water barrier material, and due to the fact that solid particles of the pozzolanic material remain therein, silica-gel is further produced in the barrier material to reduce the hydraulic conductivity and any silica-gel which may be lost over time is replenished by newly formed silica-gel. Due to the crystalline nature of the steel slag material, the formation of CSH-gel, which could reduce the plasticity of the barrier material, is limited.
Abstract:
A Lassenite-containing water-based drilling mud composition for use in cementing operations, and method of using same is provided. The composition includes water, Lassenite, a heavy-weight additive, a viscosifier, a dispersant and at least one of a set activator, a fluid loss control additive and a shale stabilizer.
Abstract:
Construction castable material with controllable flow or slump comprising (a) a binder comprising fly ashes comprising from 1.5% to 35% by weight of CaO and a Lost on Ignition (LOI) value from 0.5% to 5.5% by weight, representing from 10% to 60% of the binder weight and ground granulated blast furnace slag comprising from 40% to 70% by weight of CaO and from 30 to 60% by weight of Si02, representing from 40% to 90% of the binder weight, (b) an activator comprising alkaline reagents selected from the group composed by water glass, preferably in solution with 30 to 50% by weight solid content, sodium metasilicates and sodium hydroxide, (c) sand, fine and coarse aggregates and (d) organic acids or conjugated salts of organic acids in a dosage from 0.001 % to 3% by weight with respect to the binder.
Abstract:
Embodiments relate to cementing operations and, more particularly, in certain embodiments, to settable compositions that comprise kiln dust and wollastonite and methods of use in subterranean formations. An embodiment discloses a method of cementing comprising: providing a settable composition comprising kiln dust, wollastonite, and water; and allowing the settable composition to set.