A synchronous single-liquid grouting slurry, its technology and application for large diameter shield engineering under water-rich, high-pressure and weak soil strata conditions, comprising raw materials: 1050-1200 parts of gold tailing, 420-480 parts of silicate cement clinker, 220-240 parts of fly ash, 45-120 parts of waste clay brick, 65-95 parts of slag, 25-45 parts of limestone tailing, 70-80 parts of steel slag, 30-45 parts of silica fume, 15-22 parts of desulfurized gypsum, and 9-15 parts of quick-setting and early-strength composite additive. The invention controls the d.sub.50, d.sub.85 and d.sub.95 of the material particles as 35-40, 42-48 and 50-55 m, respectively. Gold tailing with the particle size of 120-600 m being used as the fine aggregate, their volume fractions are 40-60%. The slurry production technique, comprising crushing-sieving-superfine ball milling-homogenization-particle size classification-variable speed mixing being developed. The shield tail eight-point grouting technique is being developed for filling.

A method for manufacturing a protective concrete weight coating for pipelines The invention relates to materials for application to the outer surfaces of pipes as a protective negative buoyancy coating. It allows achieving accurately a desired density of the concrete protective weight coating of the pipeline in the range of 2600 to 3400 kg/m.sup.3 by claimed method of manufacturing a protective concrete weight coating for pipelines which includes mixing cement, aggregate, a plasticizing additive and water, pumping the resultant mixture into an annular space formed by the outer surface of a pipeline and a permanent form mounted with clearance thereon, and setting the resultant coating.

The invention relates to pervious concrete compositions containing hydraulic binder, filler and polymer, characterized in that the polymer present is a vinyl acetate-ethylene-copolymer having a glass transition temperature Tg of 20 C.

A multi-component composition including A) a polyol component (A) including at least one polyol and water, B) a hardener component (B) including at least one polyisocyanate, and C) a solid component (C) including 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 hours, 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.

The present invention relates to production of a seawall concrete block, comprising the following steps: (i) meter and mix all materials with water to create a batch mixture with humidity ranging from 4% to 10%, wherein the batch components of the concrete blocks are in the following proportion (% by weight): cement (5 to 25%), mixture of fly ash and coal slag (15 to 95%); aggregate (0 to 60%): (ii) press the batch mixture collected from (i) in the mold with the compressive force of 2 MPa, after that, remove the mold to obtain the seawall concrete block.

Besides, the present invention relates to a seawall concrete block obtained by this production method.

The invention provides a marine infrastructure comprising a concrete matrix having a pH of less than 12 for use in promoting the growth of fauna and flora in aquatic environment, and methods for promoting the growth of fauna and flora in aquatic environment, including endolitic and epilitic flora and endolitic and epilitic anaerobic and aerobic flora and fauna.

A curable epoxy resin compositions containing at least one epoxy resin having on average more than one epoxide group per molecule, at least one inorganic filler, at least one hydraulic binder, and at least one polycarboxylate ether, wherein the inorganic filler has silica with an amount of between 45 and 65 wt.-%, based on the total curable epoxy resin composition, and the amount of the polycarboxylate ether is between 0.01 and 0.03 wt.-%, based on the total curable epoxy resin composition. Further, a multi-component systems for producing the epoxy resin compositions, cured epoxy resins, and methods for repairing or reinforcing a pile or column.

A restoration cap unit for construction of eco-friendly structures in a body of water is provided, which is constructed from materials including a primarily calcium carbonate material; and a cement that is capable of holding the primarily calcium carbonate material, wherein the restoration cap unit has a first side and a second side which are attached at an edge to form a tent shaped structure, such that the restoration cap unit is configured to be placed on top of an existing restoration assembly to extend the height of the restoration assembly.

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.

A restoration unit for construction of eco-friendly structures in a body of water comprising a cementitious material, wherein the restoration unit is in the form of a slab having one or more openings. The restoration unit is configured such that the restoration unit can be placed on a support unit to form a restoration assembly module having a shape selected from (i) a substantially right-angled triangular prism shape with the restoration unit at an angle, wherein the ends of the substantially right-angled triangular prism shape are open or (ii) a symmetrical or asymmetrical triangle, having one side formed from the support unit and two sides formed from the restoration units, with the ends of the substantially right-angled triangular prism shape being open, wherein the restoration assembly is configured to attenuate waves.