Disclosed are concrete curing blankets of multiple layers, which combinations of materials, and provide high performance beyond 14 days of concrete curing, without having to rewet the blankets. Also disclosed are antibacterial textile fibers.

Some implementations herein described improvements to concrete products and processes for producing concrete products that may provide a positive environmental impact and that can be stronger relative to the percent of cement used. Particular examples include improvements to zero-slump to near-zero-slump concrete mixture design, material storage and handling, batching, mixing, sequencing and curing processes, as well as forming and curing techniques.

A method of producing a carbonated composite material includes: providing a carbonatable cementitious material in particulate form; mixing the carbonatable cementitious material with water to produce a mix; forming a predetermined shape with the mix, wherein the predetermined shape has an initial pore structure containing an initial pore solution having a first pH; pre-conditioning the predetermined shape to remove a predetermined amount of the water from the predetermined shape to produce a pre-conditioned shape; carbonating the pre-conditioned shape in an environment comprising carbon dioxide to produce a modified pore structure containing a modified pore solution having and a second pH, wherein the difference between the first pH and the second pH is represented by a ΔpH, and the ΔpH is 1.0 or less.

A system and a method for concrete production is disclosed. In some implementations, the method comprises the steps of mixing of a calcium carbide residue (CCR) and ordinary Portland cement (OPC) to produce a CCR-OPC blended concrete, incorporating the CCR-OPC blended concrete in its fresh or hardened state to a carbonation chamber for accelerated carbonation curing, and producing a carbonated CCR-OPC blended concrete after the accelerated carbonation curing. The CCR-OPC blended concrete is exposed to a carbon dioxide (CO.sub.2) gas to promote a plurality of properties. The system includes a blending module and a carbonation chamber. The blending module mixes CCR and OPC to produce a CCR-OPC blended concrete, and the carbonation chamber performs accelerated carbonation curing of the CCR-OPC blended concrete in its fresh or semi-hardened state to produce a carbonated CCR-OPC blended concrete.

Some implementations herein described improvements to concrete products and processes for producing concrete products that may provide a positive environmental impact and that can be stronger relative to the percent of cement used. Particular examples include improvements to zero-slump to near-zero-slump concrete mixture design, material storage and handling, batching, mixing, sequencing and curing processes, as well as forming and curing techniques.

Some implementations herein described improvements to concrete products and processes for producing concrete products that may provide a positive environmental impact and that can be stronger relative to the percent of cement used. Particular examples include improvements to zero-slump to near-zero-slump concrete mixture design, material storage and handling, batching, mixing, sequencing and curing processes, as well as forming and curing techniques.

The present disclosure relates to an oyster settlement substrate technology, and particularly relates to a settlement substrate of Portland cement concrete and lightweight concrete for oyster and a preparation method thereof. According to the settlement substrate for inducing marine sessile organisms, an inducer is mixed to greatly improve the capability of rapid induction of settlement and metamorphosis of sessile organisms and promotion of long-term growth, and other properties of concrete are basically not affected; and the settlement substrate for inducing the marine sessile organisms can be used for construction of marine ecological engineering and corrosion prevention of marine concrete engineering.

The invention relates to a production plant for producing concrete tubbing (500) for a tunnel lining system having at least one formwork (10) for producing the concrete tubbing (500), wherein the production plant is designed either as a carousel system, which has at least one production line (200) with at least two work stations (210, 220, 230, 240, 250, 260) and with at least one transport route (110) between the at least two work stations (210, 220, 230, 240, 250, 260), each for executing at least one operation step in the production of the concrete tubbing (500), or as a stationary plant with at least two stationary formworks (10), wherein the operation steps necessary for producing the concrete tubbing (500) are each executed on the formworks (10), and with at least one curing station (300), for curing a concrete filled in the formwork (10) for producing the concrete tubbing (500). At least one robot (140) is provided to execute the at least one operation step on one of the at least two work stations (210, 220, 230, 240, 250, 260) or two formworks (10) are provided. At least one route (120) is provided which extends at least partially along or transverse to the at least one production line (200) or along or transverse to the formwork (10). At least one travel element (130) is provided on which the at least one robot (140) is arranged with a base (131) and with which the at least one robot (140) can be moved at least partially along or transverse to the at least one production line (200) or formwork (10).

The present description relates to methods of producing a wet-cast slag-based concrete product particularly where the wet-cast slag-based concrete product is cast, pre-conditioned and cured with carbon dioxide inside a mould and/or inside a mould placed in a curing chamber. The wet-cast slag-based concrete product is optionally reinforced.

A method of curing a concrete product having a cavity is described and includes positioning the concrete product on a base, sealing an opening to the cavity using a cover plate, introducing carbon dioxide (CO2) gas into the cavity to execute carbonation of the concrete product, and, in response to the concrete product attaining a target specification, unsealing the opening. A system for curing a precast concrete product is also described.