| Patent Number |
Title Of Patent |
Date Issued |
| 6802673 |
Tunnel boring with foamed composition |
October 12, 2004 |
| A process of boring a tunnel using an earth-pressure balance shield boring tunnelling machine having a cutting head, an excavation chamber for soil removed by boring and conveying means for removal of said soil from the excavation chamber; wherein there is injected into a stratum being b |
| 6762220 |
Cement additive |
July 13, 2004 |
| A cement additive comprising a polycarboxylic acid type copolymer and/or a salt thereof and a polyalkylene glycol derivative, wherein said polycarboxylic acid type copolymer contains one or more species of copolymers composed of at least an unsaturated polyalkylene glycol type monome |
| 6761504 |
Waterproof cladding construction and method of providing the same |
July 13, 2004 |
| A cladding for a partially-overhanging substrate, such as a tunnel wall which comprises in sequence, from the tunnel wall, a drainage means, a sprayed polymeric membrane and a final layer of concrete. The cladding gives an effective cladding in conditions where the tunnel walls suffer |
| 6723163 |
Concrete admixture |
April 20, 2004 |
| An accelerating admixture for sprayed concrete comprises: (a) the reaction product of aluminium hydroxide with an organic acid; (b) aluminium sulphate; and (c) at least one alkanolamine. Concrete to which accelerator has been added sets rapidly. |
| 6586497 |
Transport of solid particulates |
July 1, 2003 |
| A method is provided for incorporating a foaming agent into mixtures of particulates and then forming a foam within the mixture to increase the flowability of the particulates. A method is also provided for excavating solid particulates, incorporating a foaming agent into mixtures of sol |
| 6569924 |
Solubilized defoamers for cementitious compositions |
May 27, 2003 |
| Solubilizing agents are mixed with water insoluble defoamers and a dispersant for cementitious compositions to provide an admixture for cementitious compositions that is stable over time. Suitable solubilizing agents include alkoxylated moieties or particles. A cementitious compositi |
| 6514595 |
Integrated marking materials |
February 4, 2003 |
| A dry formulation for an integrated marking material for concrete and asphalt application comprises a cementitious mixture including a hydraulic or cementitious binder, a redispersible polymeric cement modifier, a retroreflective agent filler, and optionally, a reflective agent filler. |
| 6492461 |
Oligomeric dispersant |
December 10, 2002 |
| A composition that is a reaction product of two or three moieties. The first moiety (A) is a nonpolymeric, functional moiety that can adsorb onto a particle. The second required moiety (C) is a linear or branched water soluble, nonionic polymer that is capable of providing dispersing |
| 6485233 |
Foaming composition |
November 26, 2002 |
| A method of boring a tunnel through a stratum utilizing a shield tunneling apparatus, the process comprising the injection into the stratum at the cutting face of an aqueous material comprising (a) from 0.005-0.05% by weight of a polyethylene oxide of weight-average molecular weight from |
| 6468344 |
Compositions and methods for curing concrete |
October 22, 2002 |
| An internal curing composition for concrete includes a glycol and a wax. The glycol is preferably polyethylene glycol and the wax is preferably paraffin wax. When added to concrete, the composition facilitates the curing of concrete to a low porosity, high compressive strength product. |
| 6461425 |
Cementitious dry cast mixture |
October 8, 2002 |
| The present invention is directed to cementitious dry cast mixtures for forming cementitious articles, particularly a cementitious dry cast mixture containing a dispersant, wherein said dispersant is a derivatized polycarboxylate dispersant which is a polymer comprising units derived |
| 6451881 |
Oligomeric dispersant |
September 17, 2002 |
| A cementitious formulation comprising a cement and an oligomeric dispersant is provided. The dispersant is a reaction product of two or three moieties. The first moiety (A) is a nonpolymeric, functional moiety that adsorbs onto a particle, and wherein one or more A moieties together |
| 6429266 |
Thermal grafts of polyamides with pendant carboxylic acid groups, methods for producing the same |
August 6, 2002 |
| Heating an intimate mixture of: (a) a polyamide which contains pendant carboxylic acid groups; and (b) a compound which contains an amino group efficiently affords graft polymers with a high graft density. Such graft polymers are particularly useful as additives for cementitious comp |
| 6395401 |
Bond-compatible composite membrane |
May 28, 2002 |
| The invention is directed to a bond-compatible composite membrane that includes a bituminous material layer and a polyester layer and its use as an intermediate layer between a building structure and exterior finishing materials. Unlike conventional composite membranes, the bond-compatib |
| 6391106 |
Cementitious mixture containing high pozzolan cement replacement and compatabilizing admixtures |
May 21, 2002 |
| A cementitious mixture comprises a hydraulic cement; greater than about 10% by weight of a pozzolanic cement replacement selected from fly ash, slag, natural pozzolans, and mixtures thereof, based on the weight of said hydraulic cement and cement replacement; and a compatabilizing admixt |
| 6376581 |
Cement dispersant, method for production thereof, and cement composition using the dispersant |
April 23, 2002 |
| A cement dispersant having excellent ability to prevent slump loss and high water-reducing property which comprises a polycarboxylic acid type polymer having a specific molecular weight distribution, a method for the production thereof, and a cement composition using the dispersant are |
| 6310143 |
Derivatized polycarboxylate dispersants |
October 30, 2001 |
| The present invention is directed to derivatized polycarboxylate dispersants for cementitious mixtures, including those mixtures with high percentages of pozzolan cement replacement and dry cast applications. In particular, the invention is directed to a cementitious mixture comprising |
| 6297295 |
Transport of solid particulates |
October 2, 2001 |
| A method is provided for incorporating a foaming agent into mixtures of particulates and then forming a foam within the mixture to increase the flowability of the particulates. A method is also provided for excavating solid particulates, incorporating a foaming agent into mixtures of sol |
| 6290770 |
Cementitious mixture containing high pozzolan cement replacement and compatabilizing admixtures |
September 18, 2001 |
| A cementitious mixture comprises a hydraulic cement; greater than about 10% by weight of a pozzolanic cement replacement selected from fly ash, slag, natural pozzolans, and mixtures thereof, based on the weight of said hydraulic cement and cement replacement; and a compatabilizing admixt |
| 6284867 |
Highly efficient cement dispersants |
September 4, 2001 |
| A substantially non-crosslinked polymer cementitious composition dispersant for the improvement of the fluidity of cementitious compositions comprising hydrophilic side chain substituted polyimide or polyamide backbone units, having at least some proportion of grafted oligomeric or p |
| 6270567 |
Surface appearance-improving agent |
August 7, 2001 |
| A material for improving the surface appearance of cementitious mouldings comprises a polyalkylene oxide compound which is selected from polypropylene oxide adducts of either polyethylene glycol or polyethylene oxide-ethylene diamine adduct, polypropylene oxide chains being attached |
| 6267814 |
Cementitious dry cast mixture |
July 31, 2001 |
| The present invention is directed to cementitious dry cast mixtures for forming cementitious articles, particularly a cementitious dry cast mixture containing a dispersant, wherein said dispersant is a derivatized polycarboxylate dispersant which is a polymer comprising units derived |
| 6248166 |
Porous material and cementitious compositions prepared therefrom |
June 19, 2001 |
| A method of treating a shell sand by heating it to 300.degree. C. maximum for a time sufficient to remove substantially all of the water and organic content while maintaining substantially all of the inherent porosity of the shell sand. Generally, the time required varies between 10 minu |
| 6193439 |
Process for cladding substrates and constructions produced thereby |
February 27, 2001 |
| A construction for a partially-anchoring substrate, particularly a tunnel, comprises a sealing front layer applied to the substrate or an initial concrete layer applied thereto, and a non-deformable second layer applied to the first layer, the surface of the first layer (and, if present, |
| 6187841 |
Cement composition using the dispersant of (meth)acrylic esters, (metha)acrylic acids polymers |
February 13, 2001 |
| A cement dispersant having excellent ability to prevent slump loss and high water-reducing property which comprises a polycarboxylic acid type polymer having a specific molecular weight distribution, a method for the production thereof, and a cement composition using the dispersant are |
| 6166119 |
Flowability additive |
December 26, 2000 |
| A cement pumpability-enhancing additive which confers good pumpability on cementitious compositions such as concrete consists essentially of(a) polyethylene glycol;(b) diethylene glycol monobutyl ether and/or a derivative thereof;(c) polysaccharide; and(d) a thickening polymer selected from the |
| 6136950 |
Highly efficient cement dispersants |
October 24, 2000 |
| The invention is directed to a polymer dispersant comprising a substituted polyimide or polyamide backbone, having at least some proportion of oligomeric or polymeric grafted side chains including one of amides, esters, and thioesters, having the general formula: wherein X is at least |
| 6136088 |
Rapid setting, high early strength binders |
October 24, 2000 |
| A method for making a cementitious material comprises forming a mixture of water and active ingredients consisting essentially of i) a compound capable of providing, in aqueous solution, magnesium ions, ii) a potassium phosphate compound and iii) optionally an additional phosphate source |
| 6133347 |
Oligomeric dispersant |
October 17, 2000 |
| A cementitious formulation comprising a cement and an oligomeric dispersant is provided. The dispersant is a reaction product of two or three moieties. The first moiety (A) is a nonpolymeric, functional moiety that adsorbs onto a particle, and wherein one or more A moieties together |
| 6131353 |
Composite weather barrier |
October 17, 2000 |
| A composite drainage mat for preventing water and moisture from remaining trapped within walls and roofs of buildings which includes a weather barrier fixedly attached to a three-dimensional matrix filamentatious mat of a thermoplastic polyamide resin such as Nylon 6. The mat contains a |
| 6065685 |
Spray nozzle |
May 23, 2000 |
| A spray nozzle of the type adapted to feed a liquid to a material being sprayed therefrom comprises a tubular spray conduit around which is arranged an annular feed port, this feed port being closed in a liquid-tight manner by resilient material openable by liquid pressure and whose |
| 6063184 |
Admixtures for cementitous compositions |
May 16, 2000 |
| The invention relates to a random styrene-maleic anhydride (SMA) copolymer in free acid or salt form wherein the copolymer has the following types and numbers of monomer units ##STR1## in which M is selected from hydrogen, a cation and a residue of a hydrophobic polyalkylene glyc |
| 6042259 |
Admixture dispensing and concrete mixer monitoring system |
March 28, 2000 |
| An admixture dispensing and concrete mixer monitoring system which determines the correct amount of admixture, such as a stabilizer, to dispense in a load of unused concrete or for washing out a concrete mixer includes an admixture dispensing unit linked to a computer system. The com |
| 6042258 |
Admixture dispensing and concrete mixer monitoring method |
March 28, 2000 |
| An admixture dispensing and concrete mixer monitoring system which determines the correct amount of admixture, such as a stabilizer, to dispense in a load of unused concrete or for washing out a concrete mixer includes an admixture dispensing unit linked to a computer system. The com |
| 6008275 |
Cementitious mixture containing high pozzolan cement replacement and compatabilizing admixtures |
December 28, 1999 |
| A cementitious mixture comprises a hydraulic cement; greater than about 10% by weight of a pozzolanic cement replacement selected from fly ash, slag, natural pozzolans, and mixtures thereof, based on the weight of said hydraulic cement and cement replacement; and a compatabilizing admixt |
| 6005057 |
Cement grinding aid |
December 21, 1999 |
| A cement clinker grinding aid which comprises a styrene-maleic anhydride copolymer (SMA) superplasticiser. The SMA is preferably a type with polyoxyalkylene-based side chains. Use of the grinding aid renders the grinding process more efficient and improves the performance of cementit |
| 5997630 |
Concrete accelerators |
December 7, 1999 |
| An accelerating admixture for use with spraying cementitious compositions such as shotcrete comprises (a) a compound selected from aluminium hydroxide, aluminium hydroxysulphate and mixtures thereof, and (b) an acidic substance which essentially does not react with the compound. The |
| 5968256 |
Cement accelerating admixture |
October 19, 1999 |
| An accelerating admixture for use with sprayable cementitious compositions such as shotcrete comprises a mixture of (a) amorphous aluminium hydroxide and/or aluminium hydroxysulphate, and (b) at least one amine, preferably an alkanolamine. In a preferred embodiment, the admixture also co |
| 5935318 |
Concrete spraying additives |
August 10, 1999 |
| An accelerating admixture for use with cementitious compositions, especially shotcrete, comprises aluminium sulphate and at least one alkanolamine. The admixture also preferably comprises an stabilising agent, which is preferably selected from aqueous stable polymeric dispersions and |
| 5925699 |
Concrete curing admixtures |
July 20, 1999 |
| An admixture for use in cementitious compostions which are to be applied in consecutive layers consists essentially of a water-soluble polyalkylene oxide and a superabsorbent material. Optionally (and preferably) also present is a plasticiser or superplasticiser, preferably a polyalkylen |
| 5911819 |
Cement spraying admixture |
June 15, 1999 |
| A method for coating a substrate with a cementitious composition by spraying, comprising the addition to the initial cementitious mix one of a .beta.-naphthalene sulphonate-formaldehyde condensate and a water-soluble poly(alkylene oxide) of molecular weight from 100,000-8,000,000, the ot |
| 5908885 |
Polysuccinimide and polyaspartate as additives to cementitious materials |
June 1, 1999 |
| Polysuccinimide and/or polyaspartate, copolymers of succinimide and aspartate and the polymers cross-linked with a diamine are demonstrated to be enhancement agents for the preparation of cementitious materials. The agents may be added to the dry cementitious mixture or the water which i |
| 5895525 |
Rapid setting cementitious compositions and method |
April 20, 1999 |
| Rapid setting cementitious compositions comprise hydraulic cement and at least 4% by weight based on the weight of the cement of a water-soluble malate or citramalate such as an alkali metal malate or alkali metal citramalate. |
| 5880182 |
Water-reducing admixtures for cementitious compositions |
March 9, 1999 |
| An admixture for decreasing the water demand of cementitious compositions such as concrete consists of(a) from 75-25% by weight of a water-reducing agent whose major component is a polycarboxylate; and(b) from 25-75% by weight of at least one saccharide component selected from hydrogenat |
| 5792252 |
Cement compositions and admixtures thereof |
August 11, 1998 |
| Cement admixtures contain an alkali metal carbonate as component (a) and a mono- or di-carboxylate acid or alkali metal salt thereof or an alkali metal salt of a tricarboxylic acid as component (b). |
| 5772753 |
Cement accelerators |
June 30, 1998 |
| A cement setting and hardening accelerator having the formulawherein R is a basic anion which is not sulphate, and x+y=3. The anion is preferably derived from an acid RH.sub.n which is preferably an organic acid. The accelerator gives excellent performance in shotcrete and is alkali-free |
| 5762701 |
Pozzolanic compositions |
June 9, 1998 |
| Storing, transporting and dispensing of silica fume containing pozzolanic compositions can be improved by mixing an amount of water in the range of 2 to 25% with the silica fume containing composition so that a uniform humidified powder is obtained. The treated silica fume containing |
| 5753037 |
Fluidity control of cementitious compositions |
May 19, 1998 |
| The fluidity characteristics of cementitious compositions may be rapidly altered by the addition thereto of an aqueous dispersion of at least one comb polymer which comprises carboxylic moieties. The invention works especially well when the polymer is combined with an accelerator which i |
| 5728209 |
Unitized cement admixture |
March 17, 1998 |
| An additive for concrete, mortar or grout comprises at least one admixture material in a compacted unit of selected amount, the unit having strength sufficient to maintain structural integrity during handling and storage, but having sufficient solubility or friability upon mechanical agi |
| 5716448 |
Hydraulic composite |
February 10, 1998 |
| Excavated earth from construction sites may be recycled as backfilling material or grout by incorporating it into a hydraulic composite. This is done firstly by blending excavated soil with a solidifying quantity of a hydraulic material and a fluidifying quantity of water and at least on |
