The present disclosure relates to a binder jet 3D process for preparing a ceramic part in which a binder composition is deposited on a powder material in a binder jet machine during which the binder in the binder composition comprises a preceramic polymer, and the binder impregnates particles of the powder.

Provided herein are active flow-through carbonation curing systems useful for contacting carbon dioxide (CO.sub.2) gas streams with concrete materials under ambient pressure. This contacting causes a carbonation reaction in which CO.sub.2 forms materials, such as, but not limited to, calcium carbonate (CaCO.sub.3). The methods include, but are not limited to, contacting a conditioned flue gas containing CO.sub.2 inside of a carbonation chamber with green bodies or concrete components in which flue gas properties such as temperature, relative humidity, flow rate, and flow direction, are self-adjusted during the curing process based on a self-sensing instrumentation system inside a curing chamber and carbonation kinetic regression model. This system improves CO.sub.2 capture efficiency and material performance while reducing processing energy.

The subject matter of this specification can be embodied in, among other things, a method of finishing a stone slab that includes receiving a stone slab having a major top surface having a first surface finish, and applying a second surface finish, different from the first surface finish, to modify a portion of the major top surface that is less than an entirety of the major top surface.

The present invention discloses novel solar autoclave equipment, which comprises an autoclave and a steam providing device, wherein said steam providing device is a solar heating device and comprises a plurality of vacuum tubes which are fixedly arranged outdoors and a connecting tube, a tubular water tank is installed in each said vacuum tube in an insertion manner, each said tubular water tank is in the shape of a straight tube with a closed lower end and an open upper end, the upper end of each said tubular water tank stretches out of said corresponding vacuum tube and is communicated with said connecting tube, and a space between the outer surface of the upper end of said tubular water tank and the inner wall of the upper end of said corresponding vacuum tube is sealed; and an inlet of said connecting tube is connected with a condensate water drain outlet of said autoclave, and an outlet of said connecting tube is connected to a steam input port of said autoclave through a compressor. The present invention uses the compressor to depressurize the solar heating device to obtain steam, the steam is pumped into the autoclave and condensed to release heat to provide corresponding temperature and pressure to the autoclave, and thus the solar heating device can be applied on autoclave equipment.

A process for forming an artificial reef includes forming a form having a geometric shape, applying at least one blockout onto a surface of the form such that the blockout extends outwardly of the surface of the form, applying a sprayable concrete over the form and over a portion of the blockout, curing the sprayable concrete on the form for a period of time such that the sprayable concrete adheres to the blockout, and removing the cured sprayable concrete and the blockout from the surface of the form. The blockout is of a cast concrete material such as a cinder block. The blockout has openings therein so as to open to an interior of the artificial reef.

Disclosed are concrete curing blankets having two or more channels. The channels extend longitudinally and are formed by fluid-tight seals, where all of the layers of the blanket are bonded together. The concrete curing blankets are placed over poured and curing concrete to maintain high water content in the concrete during curing and to accelerate the concrete curing and hardening processes.

Automated systems for managing the curing of concrete employ drones that may be employed without contacting a surface of the concrete. The drones may include sensing drones, which may monitor one or more conditions of the concrete as it cures, application drones, which may apply moisture, curing aids, and/or other chemicals to the concrete to control the manner in which the concrete cures, and/or support drones that may carry conduits that extend between a source of moisture, a curing aid, and/or another chemical and an application drone to prevent the conduits from contacting the surface of the concrete. Such a system may also include a central control unit that receives information about the curing concrete and uses that information to manage curing of the concrete, including coordination of the movement and operation of various drones used to manage curing of the concrete.

Methods and systems for electron beam assisted fused deposition modeling can include a particle accelerator configured to generate a particle beam, a shield cone and a magnet configured to direct the particle beam in the shield cone forming a beam extraction assembly configured to direct the terminal position of the particle beam on filament deposited by an additive manufacturing system, and a control system for controlling the beam spot location of the particle beam on the filament, such that the particle accelerator delivers a dose of irradiation along the build path according to the assigned irradiation value with the particle beam.

A cement-based tile formed from a mixture comprising: a cement in the range of about 0.1 to 88% by wet weight percent; a secondary material in the range of about 0.1 to 50% by wet weight percent, the secondary material comprising limestone, sand, silica sand, gypsum, silica fume, fumed silica, Plaster of Paris, calcium carbonate, fly ash, slag, rock, or a combination thereof; a reinforcement fiber in the range of about 0.5 to 20% by wet weight percent, the reinforcement fiber comprising cellulose fiber, glass fiber, plastic fiber, polypropylene fiber, polyvinyl alcohol (PVA) fiber, homopolymer acrylic fiber, alkali-resistant fiber, or a combination thereof; a rheology modifying agent in the range of about 0.5 to 10% by wet weight percent; a water in the range of 10 to 60% of a total wet material weight; and wherein the mixture is extruded or molded to form the cement-based tile.

A permeable pavement and cured fiber composition and a related method are provided. The permeable pavement composition includes a quantity of pavement material, and a quantity of cured carbon fiber composite material (CCFCM) configured to be added to the pavement material to produce a reinforced composition having improved characteristics. An example of pavement material includes a pervious concrete material. The method includes providing a quantity of pavement material and adding a quantity of cured carbon fiber composite material to the pavement material to produce a reinforced composition having improved characteristics.