This invention discloses a double-liquid grouting slurry, its technology and application for super large diameter underwater shield engineering under high water pressure condition. The materials of slurry I are: 35-45 parts of cement clinker; 15-25 parts of slag; 24-35 parts of fly ash; 15-25 parts of steel slag; 5-15 parts of bentonite; 4-10 parts of limestone tailing; 0.3-2.0 parts of water reducing agent; 0.5-2.5 parts of cellulose. The materials of slurry II are: 0.2-3.8 parts of short-cut fiber; 96-99 parts of sodium silicate solution; 0.8-4.8 parts of viscous polymers. This invention generates the double-liquid slurry preparation process including crushing-screening-milling-group mixing-grouped mixing at different speeds, the volume ratio of slurry I and II is 1:1-10:1 during grouting, and the slurry is injected into the shield void through the six-point position technology at the shield tail and 3+2+1 segment splicing synchronous grouting techniques.

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 μm, respectively. Gold tailing with the particle size of 120-600 μm 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.

This application discloses an advanced design method for customized RCP, (cRCP), with one or more made-to-order reinforcement cages supporting one or more wall-encapsulated heat-exchange channels, cast with special-batch (SB) concrete having additions of fine-disperse CaCO.sub.3 and particular polymer fibers; the resulting Single- and DoubleEPipe sections especially adapted for heat exchange with pipe-internal wastestreams and/or groundwater and including provisions for an optional graywater accumulator for efficient recapture of both water and energy.

This application discloses an advanced design method for customized RCP, (cRCP), with one or more made-to-order reinforcement cages supporting one or more wall-encapsulated heat-exchange channels, cast with special-batch (SB) concrete having additions of fine-disperse CaCO.sub.3 and particular polymer fibers; the resulting Single- and DoubleEPipe sections especially adapted for heat exchange with pipe-internal wastestreams and/or groundwater and including provisions for an optional graywater accumulator for efficient recapture of both water and energy.

A pavement system that avoids the need for traditional contraction joints regardless of dimension of the pavement. The concrete composite pavement, comprises (i) a gap-graded concrete first layer; (ii) a flexural-hardening fiber reinforced mortar second layer, wherein the gap-graded concrete comprises cement, water and coarse aggregate, the flexural-hardening fiber reinforced mortar comprises cement; water, fine aggregate with a maximum particle size; fiber reinforcement comprising of synthetic and/or metal fibers; wherein the total thickness of the composite pavement is selected depending on the required maximum service point load, using the following formula H=(F/100).sup.0.5×100 mm, where H is the total thickness of the composite pavement and F is maximum service point load; wherein the ratio of the thickness of flexural-hardening fiber reinforced mortar second layer to the total thickness of the composite pavement is within the range of 1:5 to 2:5.

A pavement system that avoids the need for traditional contraction joints regardless of dimension of the pavement. The concrete composite pavement, comprises (i) a gap-graded concrete first layer; (ii) a flexural-hardening fiber reinforced mortar second layer, wherein the gap-graded concrete comprises cement, water and coarse aggregate, the flexural-hardening fiber reinforced mortar comprises cement; water, fine aggregate with a maximum particle size; fiber reinforcement comprising of synthetic and/or metal fibers; wherein the total thickness of the composite pavement is selected depending on the required maximum service point load, using the following formula H=(F/100).sup.0.5×100 mm, where H is the total thickness of the composite pavement and F is maximum service point load; wherein the ratio of the thickness of flexural-hardening fiber reinforced mortar second layer to the total thickness of the composite pavement is within the range of 1:5 to 2:5.

A method for treating soil contaminated with hydrocarbons, in particular with polycyclic aromatic hydrocarbons, includes working the soil with, by weight of soil from 0.1 to 12% of activated carbon; and from 0.1 to 10% of hydraulic binder, the total content of activated carbon and of hydraulic binder in particular ranging between 0.5 and 15%.

A method for treating soil contaminated with hydrocarbons, in particular with polycyclic aromatic hydrocarbons, includes working the soil with, by weight of soil from 0.1 to 12% of activated carbon; and from 0.1 to 10% of hydraulic binder, the total content of activated carbon and of hydraulic binder in particular ranging between 0.5 and 15%.

Various embodiments disclosed relate to cement activator compositions for treatment of subterranean formations. In various embodiments, the present invention provides a method of treating a subterranean formation including placing in the subterranean formation a liquid cement activator composition including water, an alkali sulfate salt, a polyphosphate salt, and a stabilizer polymer.

Various embodiments disclosed relate to cement activator compositions for treatment of subterranean formations. In various embodiments, the present invention provides a method of treating a subterranean formation including placing in the subterranean formation a liquid cement activator composition including water, an alkali sulfate salt, a polyphosphate salt, and a stabilizer polymer.