A heavyweight concrete composition comprising cement, steel slag coarse particles, steel slag fine particles, and iron ore aggregate, a wet concrete slurry of water mixed with the heavyweight concrete composition, and a heavyweight concrete which is a cured form of the wet concrete slurry. In the present disclosure, sand, which is used in conventional concretes, is replaced with steel slag fine particles to produce a sand-free heavyweight concrete.

The present invention relates to a method for preparing a flexible and tough polymer modified asphalt composition which comprises sparging an oxygen containing gas through a liquid high-vinyl polybutadiene modified asphalt, wherein the liquid high-vinyl polybutadiene modified asphalt contains from about 0.25 weight percent to about 20 weight percent of the liquid high-vinyl polybutadiene, wherein the oxygen containing gas is sparged through the liquid high-vinyl polybutadiene modified asphalt at a temperature within the range of about 400 F. to about 550 F. for a period of time which is sufficient to increase the softening point of the asphalt to a value which is within the range of 185 F. to 250 F. and to attain a penetration value of at least 15 dmm to produce the polymer modified asphalt composition.

Disclosed herein are compositions and methods for increasing the viscosity of a calcium-containing fluid by addition of a modifying agent. The resulting enhanced viscosity fluid may be used in a variety of applications including drilling, to create an enhanced-viscosity fluid, and demolition/mining to create an expansive putty for use in underwater and overhead applications.

The present invention relates to a method for manufacturing a road surfacing comprising on the surface the pipes of a heat exchanger device, characterised in that it comprises the following steps: a) spreading at a temperature below 160 C. asphalt mix, comprising a granular fraction, a hydrocarbon-based binder, said asphalt mix being workable, having a workability, measured with a Nynas workability meter at the working temperature of the asphalt mix, of less than 400N, then b) depositing the pipes, said pipes having a crushing strength greater than 3000 N per linear metre of pipe at 100 C., a thermal expansion less than 200.10.sup.6 K.sup.1 at 20 C. in such a way as to enable their indentation even in the absence of cooling means or pressure application means, then c) indenting the deposited pipes into said integration layer by compacting said asphalt mix during the workability period of said asphalt mix, to form an integration layer comprising the pipes of a heat exchanger device, then d) applying a surface layer there above for the road surface, in particular a surface course.

The present invention also relates to a method for recycling a road surface.

The present invention provides a rapid-hardening underground pipeline grouting repair polymer and a preparing method thereof for underground pipes. The rapid-hardening underground pipeline grouting repair polymer comprises the base resin and the hardener, weight ratio of which is 2:1-1:1. The base resin comprises 50 to 160 parts by weight of an isocyanate; 20 to 100 parts of a chlorophosphate mixture with a density over 1400 kg/m.sup.3; a parts by weight ratio of the isocyanate and chlorophosphate is 1:1-4:1. The hardener comprises 30 to 60 parts by weight of a chlorophosphate mixture with a density over 1400 kg/m.sup.3, 5 to 15 parts of a propyl formate, a methyl propionate or a mixture of a propyl formate and a methyl propionate, 15 to 55 parts of a polyol, 1 to 3 parts of a surfactant, 2 to 6 parts of a catalyst, 0 to 0.5 parts of water and 0 to 1 parts of a colorant.

Methods and systems for the treatment of wells are disclosed. A method for treating a well comprises providing a treatment fluid comprising calcium-aluminate cement, water, and a cement set retarder; and introducing the treatment fluid into a wellbore. A system for treating a well comprises a treatment fluid comprising calcium-aluminate cement, water, and a cement set retarder; a vessel to contain the treatment fluid; a pumping system coupled to the vessel to pump the treatment fluid; and a conduit coupled to the pumping system.

A cementitious composite includes a cementitious mixture of cementitious materials and non-cementitious materials. Prior to the in-situ hydration, V.sub.b=M.sub.c/.sub.c.Math.(1+F.sub.v)+.sub.i.sup.n(M.sub.nc.sub.i/.sub.nc.sub.i) where V.sub.b is the bulk volume of the cementitious mixture per unit area of the cementitious composite, M.sub.c is a mass of the cementitious materials of the cementitious mixture per unit area of the cementitious composite, .sub.c is a density of the cementitious materials of the cementitious mixture, M.sub.nc.sub.i is a mass of each constituent type of the non-cementitious materials of the cementitious mixture per unit area of the cementitious composite, .sub.nc.sub.i is a density of each constituent type of the non-cementitious materials of the cementitious mixture, and F.sub.v is a ratio of the volume of the voids within the cementitious mixture relative to the volume of the cementitious materials of the cementitious mixture per unit area of the cementitious composite. F.sub.v is between 0.64 and 1.35.

Methods and systems for the treatment of wells are disclosed. A method for treating a well comprises providing a treatment fluid comprising calcium-aluminate cement, water, and a cement set retarder; and introducing the treatment fluid into a wellbore. A system for treating a well comprises a treatment fluid comprising calcium-aluminate cement, water, and a cement set retarder; a vessel to contain the treatment fluid; a pumping system coupled to the vessel to pump the treatment fluid; and a conduit coupled to the pumping system.

A hydraulically binding composition can be used to produce an inorganic fire-protection and/or insulation foam. The composition includes: (i) a hydraulic binder, (ii) a blowing-agent mixture, (iii) a thermally expandable compound, and (iv) optionally a foam stabilizer, where the at least one thermally expandable compound, depending on a particle size thereof and an adjusted density of a foamed composition, is present in a quantity such that a foam structure of the foamed composition is not destroyed by expansion thereof during heating of the composition above an onset temperature thereof.

A cable surround material for a cable of an electricity transmission system comprising a mixture of: an additive containing carbon; sand; and cement, wherein the material comprises, by weight, approximately 60-80% carbon containing additive, approximately 5-10% cement, and a remainder of sand.