The present invention relates to a composition for manufacturing methylene malonate cementitious hybrid systems. Particularly, the invention relates to a composition comprising at least one methylene malonate monomer (A), at least one methylene malonate polymer (B), at least one acidic stabilizer (C), and cement (D), to the preparation thereof, and to the use of the composition in construction, particularly as a surface protection material, a structural consolidation material or as a material used in underground constructions.

A method of sealing propagating cracks in a sensor-laden cement sheath comprising the steps of monitoring an electrical resistivity of the sensor-laden cement sheath to produce a measured value, wherein the sensor-laden cement sheath comprises a conductive sensor, an on-demand expanding agent, and a cement, activating a heat source when the measured value of the electrical resistivity is greater than an activation threshold, increasing a temperature of the sensor-laden cement sheath with the heat source to an activation temperature, wherein the activation temperature is operable to initiate a reaction between the on-demand expanding agent and water, wherein the activation temperature is greater than a formation temperature, reacting the on-demand expanding agent with water to produce a swelled agent, wherein the swelled agent occupies a greater volume than the on-demand expanding agent, and sealing the propagating cracks in the sensor-laden cement sheath with the swelled agent.

Cementitious compositions include: a) 4-80 wt.-%, preferably 26-75 wt.-%, especially 30-66 wt.-% of a cementitious binder, especially of Ordinary Portland Cement, b) 5-95 wt.-%, preferably 20-73 wt.-% more preferably 33-66 wt.-%, of aluminum oxide, and c) 1-15 wt.-% preferably 2-10 wt.-%, more preferably 3-6 wt.-% of fibers. Such cementitious compositions have a very high strength and are used for example for concrete repair or as grouting materials.

The invention relates to the use of a multi-component composition comprising A) a polyol component (A) comprising at least one polyol and water, B) a hardener component (B) comprising at least one polyisocyanate, and C) a solid component (C) comprising a hydraulic binder and one or more aggregates, as an early water resistant construction or repair material for constructing, repairing or refurbishing component parts, wherein the mixed and applied multi-component composition is immersed in water not later than 8 hours, preferably not later than 2 h, after application. The use as an early water resistant construction or repair material is especially suitable for component parts, which are in contact with water during operation such as offshore wind energy plants or water retaining systems, e.g. pipelines.

An application and a composition of bioremediation agents and cremated remains forming underwater sanctuaries and structures by coral reefs comprising a homogenous mixture of calcium compounds, clay, cement, earthworm enzymes, and human/animal ashes. The composition will benefit nearby reefs with added calcium for rehabilitating reefs and earthworm enzymes with detoxifying properties. The underwater sanctuaries and structures will provide habitats for wildlife.

Carbon-sequestering composite mixture and methods of carbon sequestration utilizing an aquatic composite structure composed of the composite mixture. The mixture comprises a composite, nanoparticles, and binder. The nanoparticles impact the pore size of the composite mixture, thereby positively impacting the carbon sequestration properties of the mixture. By emplacing an aquatic composite structure composed of such a mixture in an aquatic environment such that it provides erosion mitigation, simultaneous environmental protection effects may be achieved. Further, the binder positively encourages natural ecological growth on the aquatic composite structure, thereby encouraging environmental restoration and encouraging naturally-occurring carbon sequestration from the ecological growth, potentially well past the point at which the aquatic composite structure is unable to continue to sequester carbon.

A method of carbonating cement powder and use thereof. An amount of water is supplied to an initial cementitious powder to create a moistened cementitious powder. Carbon dioxide is supplied to the moistened cementitious powder, while mechanically stirring the moistened cementitious powder, to cause a reaction of the carbon dioxide with the moistened cementitious powder to produce a carbonated cementitious material. The carbonated cementitious material is dried and ground to produce a carbonated cementitious powder. The carbonated cementitious powder may be combined with ordinary cement and various ingredients or additives, such as retarders, accelerators and extenders for use in well cementing applications. Methods for cementing casing, liners and remedial operations such as plugging back, and squeeze cementing are also provided. Methods for producing a low alkaline cement suitable for high CO.sub.2 gas wells are also provided. Methods to achieve a stable retarded cement used in higher temperatures are provided.

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 disclosure relates to a field of functional coating technologies, and particularly to a durable inorganic super-hydrophilic paint, a preparation method and an application thereof. The durable inorganic super-hydrophilic paint includes the following preparation raw materials in percentage by mass: 30˜60% silicate, 5˜25% zinc oxide, 10˜40% water and 0.1˜5% wetting agent. The coating formed by a durable inorganic super-hydrophilic paint prepared by the method is a flat rigid coating, with good appearance, excellent antifouling self-cleaning and anti-microbial adhesion properties, long-term underwater stability and high mechanical strength. The paint may be applied to building external walls and home inner walls for its antifouling self-cleaning property and may be applied to a field of oil field and oil-water separation for its excellent underwater oleophobic property.

An epoxy grout composition for marine repairs contains: a liquid epoxy resin comprising up to 15 wt. % benzyl alcohol and having a viscosity of 220 to 1100 cps; a liquid hardener comprising up to 25% benzyl alcohol and having a viscosity of 50 to 85 cps and, wherein the total benzyl alcohol content of the combined resin and hardener ranges from 1 to 12 wt. %; and preferably, a particulate inorganic filler comprising 10 to 50 wt. % of particles under 150 μm and 50 to 90 wt. % of particles between 150 μm and 1.18 mm. The composition is particularly suitable for placement in the annular space between a marine structure and a fiberglass composite jacket. The composition may be provided in kit form, with premeasured containers of resin, hardener, and filler. A related method is also disclosed.