Abstract:
The present invention provides a bidirectional energy-transfer system comprising: a thermally and/or electrically conductive concrete, disposed in a structural object; a location of energy supply or demand that is physically isolated from, but in thermodynamic and/or electromagnetic communication with, the thermally and/or electrically conductive concrete; and a means of transferring energy between the structural object and the location of energy supply or demand. The system can be a single node in a neural network. The thermally and/or electrically conductive concrete includes a conductive, shock-absorbing material, such as graphite. Preferred compositions are disclosed for the thermally and/or electrically conductive concrete. The bidirectional energy-transfer system may be present in a solar-energy collection system, a grade beam, an indoor radiant flooring system, a structural wall or ceiling, a bridge, a roadway, a driveway, a parking lot, a commercial aviation runway, a military runway, a grain silo, or pavers, for example.
Abstract:
A continuous ready mix joint or texture compound manufacturing system and a method for continuously manufacturing a ready mix joint or texture compound includes a continuous mixer (110) having an inlet (112) and an outlet (114), a pump (120) disposed at the outlet (114) of the continuous mixer (110), and a disperger (130) having an inlet (132) and an outlet (134). The continuous mixer (110) is adapted to receive at least one dry ingredient (102a) and at least one wet ingredient (104a) at the inlet (112) and continuously mix the at least one dry ingredient (102a) and the at least one wet ingredient (104a) to form a mixed composition. The pump (120) is adapted to pump (120) the mixed composition from the outlet (114) of the continuous mixer (110) to the inlet (132) of the disperger (130). The disperger (130) is adapted to receive the mixed composition and apply a shear force to the mixed composition to form a homogenized, disperged composition.
Abstract:
A geopolymeric ink formulation for direct 3D printing containing a geopolymeric formulation whose components are present in such proportions as to be subjected to a geopolymerization reaction and to provide, at the end of the reaction, a solid geopolymer and wherein the formulation, before and during at least a part of the geopolymerization reaction, wherein three-dimensional chemical bonds have not yet been formed, forms a reversible-gel, non-Newtonian, viscoelastic fluid. The formulation is extruded through a 3D printing tool equipped with nozzle into strands according to a geometry such as to create a three-dimensional structure on one or more layers. The extrusion preferably takes place within a hydrophobic liquid, such as oil.
Abstract:
본 발명은 콘크리트포장이 시공되는 기층에 연속철근을 배근하고, 배처플랜트에서 압축강도 21~30MPa의 보통콘크리트를 생산하여 현장 이송 후, 체적 대비 20~40%의 기포를 혼입하여 유동성을 증가시킨 상태에서 플라이애쉬나 슬래그미분말 중 어느 하나 또는 이를 혼합한 저급 혼합재료를 혼합부로 혼합하여 형성한 보통강도 콘크리트 또는 상기 보통콘크리트에 기포를 혼입하여 유동성을 증가시킨 상태에서 실리카퓸, 메타카올린, 라텍스, 폴리머, 착색재료 중 어느 하나 또는 하나 이상을 혼합한 고급 혼합재료를 혼합부로 혼합하여 형성한 고성능 콘크리트를 숏팅하여 연속철근 콘크리트포장을 시공함으로 고강도와 고내구성을 확보하여 유지관리를 용이하게 함은 물론 숏팅되는 보통강도 콘크리트와 고성능 콘크리트의 다짐이 필요 없음으로 슬립폼 페이버의 경량화로 시공의 수월성을 제공할 수 있는 기포 숏크리트를 이용한 연속철근 콘크리트포장 시공방법에 관한 것이다.
Abstract:
Dry cement blends that include inert microparticles may be used to produce cement slurries with a lower viscosity and a longer aging window. For example, a related method may include providing a cement dry blend comprising a plurality of cement particles and a plurality of inert microparticles, wherein the inert microparticles have an average diameter at least about 3 times smaller than that of the average diameter of the cement particles; mixing water, a set retarding additive, and the cement dry blend to yield a cement slurry; storing the cement slurry; mixing a cement set accelerator into the cement slurry; introducing the cement slurry into a wellbore penetrating a subterranean formation; and allowing the cement slurry to set at a location within the wellbore, the subterranean formation, or both.
Abstract:
A cement for use in wells in which hydrogen sulfide is present, comprises polymer particles. In the event of cement-matrix failure, or bonding failure between the cement/casing interface or the cement/borehole-wall interface, the polymer particles swell when contacted by hydrogen sulfide. The swelling seals voids in the cement matrix, or along the bonding interfaces, thereby restoring zonal isolation.
Abstract:
Disclosed is a cementitious material that possesses favorable adhesion and compressive strength properties and is suitable for cold weather applications. Disclosed also are methods for the manufacture and use of the material.
Abstract:
The invention relates to a cement formulation with two liquid components. This alleviates the problems which result from dust generation where a powdered cement component is employed. Furthermore, the cement may be formed with conventional liquid handling and mixing equipment. The cement binder formulation comprises a plasticizer. As the plasticizer is non-volatile, it remains an integral part of both the formulation and the final product obtained after application and drying of that formulation.
Abstract:
The present invention relates to a method for providing modified gypsum plaster or filling compositions having reduced agglomeration in comparison to gypsum plaster or filling compositions comprising cellulose ether in a specific amount from 0.1 to 1.0 weight percent, based on the total dry weight of said composition. Also provided are dry mortars comprising cellulose ether, gelatin and gypsum for use in such methods, and gypsum-free mixtures comprising cellulose ether and gelatin which may be added to gypsum binder for use in such methods.