Hydrophobic Cement -- articles & patents **![](0logo.gif) [rexresearch.com](../index.htm)** --- **Hydrophobic Cement** --- [**http://ajw.asahi.com/article/0311disaster/fukushima/AJ201411220029**](http://ajw.asahi.com/article/0311disaster/fukushima/AJ201411220029)**The Asahi Shimbun | AJW Asia and Japan Watch****November 22, 2014** **After failures, TEPCO to use special cement to prevent contaminated water leaks** **by** **Tsuyoshi Nagano & Hiromi Kumai** The operator of the crippled Fukushima nuclear plant plans to fill in trenches on the coastline in yet another attempt to prevent highly contaminated water from pouring into the sea. Under the plan, approved by the Nuclear Regulation Authority on Nov. 21, Tokyo Electric Power Co. will inject a special cement mixture into the seaside trenches of the No. 2 and No. 3 reactors while pumping up radioactive water accumulating in them. The special mixture does not absorb water so it can spread more easily along the bottom of the trenches, displacing the tainted water. The new method will allow radioactive materials to remain in the surrounding soil, but TEPCO decided to employ the technique because it puts high priority on preventing massive amounts of highly contaminated water from leaking into the ocean. This spring, TEPCO tried to stop the water influx at the trench for the No. 2 reactor by freezing the junction of the turbine building and the trench, but the operation was tough-going. The company then attempted to stop the water inflow with a cement mixture, but was unable to do so completely. ![](AJ201411220051.jpg) --- **Patents : Hydrophobic Cement** **Yo ! Tepco ! Read This :** **METHOD FOR CONSTRUCTING SEMI-BASEMENT STRUCTURE FOR RADIOACTIVE WASTE****KR101399295** The present invention relates to a method for constructing a semi-basement for storing radioactive waste and, more particularly, to a method for constructing a semi-basement for storing radioactive waste, capable of performing an impervious construction and preventing the diffusion of radioactive materials by installing hydrophobic limestone powder, a radiation shielding sheet, and a waterproof panel between the ground and a wall while constructing an upper structure on the ground after constructing the wall and base of a silo under the ground by excavating the ground. Also, the structure is applied to a base rock, a soft ground, a sand ground, and a subterranean water ground. An impact buffering space part is separated from the wall installed under the ground with a preset distance. An earthquake-proof structure is designed and the diffusion of the radiation is prevented in an emergency situation by filling the impact buffering space part with cement mortar and curing the cement mortar with the impact buffering materials in the emergency situation when the impact buffering space part is filled with impact buffering materials. **PROCESS FOR RADIATION-CHEMICAL DECREASING OF WATER ABSORPTION OF CEMENT BRICK****UA92880** The invention relates to building, namely to the development of a process for radiation-chemical improving of performance characteristics of building materials based on cement brick. The process comprises penetration treatment of cement brick by the mixture of organosilicon monomer - vinylheptamethylcyclotetrasiloxane and polymethylsiloxane liquid with their further copolymerization in concrete volume under action of accelerated electrons. The process provides the increasing of hydrophobic and strength properties of cement brick. **PLUGGING FLUID AND PROCESS FOR PLUGGING A ZONE OF A SUBTERRANEAN FORMATION USING THIS FLUID****WO2013092818** Plugging fluid for plugging a zone of a subterranean formation adjacent to a drill hole, especially an oil drill hole, said fluid consisting of a hydrophobic liquid containing a solid silicate or a solid metasilicate, a clay, and a hydraulic cement. Process for plugging a zone of a subterranean formation adjacent to a drill hole, in which said plugging fluid is transported up to said zone while avoiding any contact with water, and in said zone the plugging fluid is brought into contact with an aqueous solution containing cations chosen from alkali metal cations and alkaline-earth metal cations, by means of which a flash setting of the plugging fluid occurs. The process makes it possible to seal the zones of loss of circulation, to permanently isolate zones of a subterranean formation adjacent to a well, surrounding a well, and to put an end to transverse flows. It also makes it possible to block or close up the drilling wells that must be abandoned. **METHOD OF SOLIDIFYING RADIOACTIVE WASTE****JPH0484800** PURPOSE:To obtain a sound solidified body with high waterproof by performing solidification after the operation for painting the hydrophobic substance in a solidification vessel is performed. CONSTITUTION:After the moisture of waste resin is adjusted from a waste resin tank 1 through a dehydrater 2, it is introduced into a kneading tank 6 with a mixer 7. In a solidification system, a specified quantity of cement from a cement silo 3 is introduced into the kneading tank 6, a specified quantity of water from a kneading water tank 4 is put therein and a specified quantity of a water reducing agent and the like from an addition agent hopper 5 is introduced therein. A solidification vessel 11, for instance, is previously treated in a hydrophobic compound tank in which silicone grease of a low coefficient of viscosity and the like and mixture of grease are put. The previous disposal is performed by painting on the inner wall face of the tank 11 through spray drive power 9 and a spray nozzle 10. After the painting for about 30 minutes the vessel 11 is carried to the lower part of the kneading tank 6, radioactive waste resin homogeneously kneaded is charged therein from the kneading tank 6 to form a solidified body 12. **& More ...** **CEMENT SLURRY COMPOSITIONS AND METHODS****WO2014134086****COMPOSITION FOR ATTRIBUTION OF HYDROPHOBIC PROPERTIES TO THE SURFACE OF BUILDING MATERIALS****UA71795****INSULATING STRUCTURE WITH HYDROPHOBIC COATING OF VARIABLE THICKNESS****UA75369****PROCESS FOR RADIATION-CHEMICAL HYDROPHOBIZATION OF CEMENT BRICK****UA93328****ENHANCERS OF THE ADHESION STRENGTH IN CEMENT COMPOSITIONS****BG111533****Preparation method of insulating super-hydrophobic coating****CN103570251****Hydrophobic roof sloping material and construction method thereof****CN103496940** **Highly hydrophobic permeable waterproof material on surface of earth architecture wall body****CN103214221****Hydrophobic coating****CN103059685****Roof water-proof thermal insulation constructionstructure****CN202810007****RAPID SETTING CONCRETE COMPOUND CONTAINING HYDROPHOBIC EMULSION AND REPAIRING METHOD OF CONCRETE STRUCTURE USING THE COMPOUND****KR20130011560****CEMENT ADMIXTURE, AND CEMENT COMPOSITION****JP2012254896****Self-waterproof sulphoaluminate cement and preparation method of concrete by using self-waterproof sulphoaluminate cement****CN102807332** **Straw ash wall thermal insulation material and preparation method thereof****CN102745962****Super-hydrophobic self cleaning wall body****CN202430851****MODIFIED CEMENT COMPOSITION, PREPARATION AND APPLICATION THEREOF****US2012186812****Waterproof, fireproof and heat-insulating reinforced composite form and preparation method thereof****CN102515671****CEMENT ADDITIVE****JP2012067011** **Waterproof material for bridge floor and construction method thereof****CN102464472****Underwater epoxy structure adhesive and preparation method thereof****CN102391817****METHOD OF PRODUCING HYDROPHOBIC CEMENT WITH IMPROVED STRENGTH CHARACTERISTICS****RU2419592****Method for improving soaking resistance of solidification body in radioactive spent resin cement solidification****CN102176334****Integrally waterproofed concrete****NZ554134****Hydrophobic gel composite cement and plugging method thereof****CN101863643****HYDROPHOBIC CEMENTITIOUS COMPOSITION.****MX2009011396****HIGH-EARLY STRENGTHENING CONCRETE COMPOSITE CONTAINING HYDROPHOBIC POLYMER AND REPAIRING METHOD OF CONCRETE STRUCTURE USING THE COMPOSITE****KR100975586****RAPID SETTING CONCRETE COMPOSITE CONTAINING HYDROPHOBIC EMULSION AND REPAIRING METHOD OF CONCRETE STRUCTURE USING THE COMPOSITE****KR100975584** **Cement base inorganic waterproof grouting material****CN101811855****Polymer cement-based waterproof dry powder mortar****CN1018118504****Hydrophobic calcium-based magnesium synthetic clinker****CN101717266****Unfired clay stabilized with polymers****CZ302139****Compound thermal-insulated water-proof slurry and application thereof****CN101638302****CEMENT ADMIXTURE AND CEMENT COMPOSITION****JP2009208982****Waterproof coating material for water-proof buildings****CN101402517****Hydrophobic thermal insulation and anti-cracking mortar for external wall and method for preparing same****CN101306938****Energy-conservation environment-friendly type EPS light aggregate concrete and manufacture method****CN101314536****Cement-base rigidity water-proofing material and preparing method thereof****CN101234874****Cement Compositions Comprising Environmentally Compatible Defoaming Agents and Methods of Use****US2008023199****Hydrophobic portland cement****US2996394****Process for preparing hydrophobically modified low foaming copolymers, as cement additives****US6528593****Granulated hydrophobic additive for cementitous materials****US2005098062****METHOD OF ERECTING WALL STRUCTURES IN MINE WORKINGS****US3751926****WATER-REPELLENT CEMENT AND SOILS****US3656979****Water resistant building materials****US2002053300****WATER RESISTANT BUILDING MATERIALS****WO0121552****METHOD OF PREPARING HYDROPHOBIC PLUGGING PORTLAND-CEMENT****SU1016487****METHOD OF OBTAINING PLASTICIZED OR HYDROPHOBIC CEMENT AND DEVICE FOR OBTAINING SAME****SU640983****WATERPROOFING ADDITIVE FOR CEMENT AND CONCRETE COMPRISING MODIFIED POZZOLANIC MATERIALS****WO9928264** **HYDROPHOBIC CEMENT MANUFACTURE PROCESS****RU2220924****COLOURED HYDROPHOBIC MORTAR****RO100925****MORTAR COMPOSITION FOR PREVENTION OF DEW CONDENSATION, COMPRISING HYDROPHOBIC POWDER****KR20040076062****Cement admixture and cement composition****KR20020042713****METHOD OF MANUFACTURE FOR PORTLAND CEMENT OF WATERPROOF****KR790001620****NON-SEGREGATE CONCRETE IN WATER****JPH0918364****ADDITIVE FOR HYDRAULIC COMPOSITION****JPH11157898****HYDROPHOBIC FLOCCULANT****JPH08168608****PRODUCTION OF CONCRETE WHICH IS MADE HYDROPHOBIC IN BLOCK STATE****JPH11199292****CEMENT ADDITIVE****JP2000319054****METHOD FOR INHIBITING HYDRATION REACTION OF CEMENT BY COATING****JPH07144942****CEMENT ADMIXTURE****JPH01122947****INORGANIC HARDENED BODY****JPH01113205** **CEMENT ADMIXTURE AND CEMENT COMPOSITION CONTAINING THE SAME****JP2000086311****POLYMER CEMENT COMPOSITION****JP2000072507****ADMIXTURE FOR CEMENT CONCRETE AND MORTAR USING HIGH-WATER-ABSORPTION RESIN****JPH0280385****WATER-REDUCING AGENT FOR CEMENT****JPH03187960****CEMENT ADMIXTURE AND CEMENT COMPOSITION****JPH1160303****HIGH-STRENGTH HYDRAULIC SUBSTANCE****JPH0375251****CURING METHOD OF CONCRETE****JPH0860867****HYDRAULIC COMPOSITION****JPH0812394****THICKENER FOR UNDERWATER CONCRETE****JP2000272945****GLASS IONOMER CEMENT-HARDENING LIQUID****JPH02212408****METHOD OF FORMING A HYDROPHOBIC SURFACE****GB1490229****RENDERING BUILDING MATERIALS HYDROPHOBIC****GB1477720****HYDROPHOBIC CEMENTITIOUS AND/OR CALCIFEROUS COMPOSITIONS****GB1475708****WATER REPELLANT METALS AND THE PREPARATION THEREOF****GB1386203****IMPROVEMENTS IN CEMENT AND MORTAR COMPOSITIONS****GB1262162****A process for impermeabilising, tightening or consolidating the ground and other earthy and stony masses****GB471637****RENDERING SURFACES HYDROPHOBIC****GB1424101****Improvement in the manufacture of hydraulic cement****GB1012182****Improvements in the properties of hydraulic cements and a process of their manufacture****GB892015****Waterproofing of materials - on the surface and in the mass****ES2076064****Mineral insulating board which is made hydrophobic and method for its manufacture****EP0980853****Process for immobilizing environmentally noxious metals and organic substances.****EP0398410****Use of concrete mixture or cement mortar mixture for the construction of sewage works and a process for the preparation of such a mixture.****EP0140826****Powdery hydrophobic composition based on cement, process for their manufacture and application.****EP0008254****Cement for making concrete article having reduced capillary water absorption and method for its production****EP1547987****Method for the production of a concrete body with a smooth surface, concrete body and use thereof as a cladding element or as a stamping tool****EP1065188** **Process for producing air-hardening mortar systems and hydraulic mortar systems****DE3528324****Process for producing concrete and mortar having water-repellent properties****DE3101754****Protecting road, railway and runway sub-layer against - frost and water - with clay cement and polyacrylamide additives****DE2149441** **Waterproof sealing concrete mix****DE1803079** **Prepn process of hydrophobic fireproof heat-insulating material****CN101088954****Hydrophobic oleophilic self-cementing sand and its preparation method****CN1884397****Hydrophobic concrete-based polyphenylene granule heat-insulating mortar dry powder and its usage method****CN1807336****Hydrophobic light bead concrete roof heat insulation structure****CN2775188** **Waterproof haydite concrete****CN1092752****Hydrophobic thermal insulation material****CN1095744****Polymer dry mixed mortar****CN1458104****METHOD FOR THE MANUFACTURE OF HYDROPHOBIC CEMENT****CA882757****METHOD FOR THE MANUFACTURE OF HYDROPHOBIC-AND-PLASTICIZED CEMENT****CA873389****WATERPROOFING MATERIAL****BG49100****Hydrophobic synthetic mineral building materials****BE821648****METHOD For protection OF UNDERGROUND oil-and-gas pipelines FROM CORROSION****UA82775****Fiber reinforced cement composite materials using chemically treated fibers with improved dispersibility****EP1829845****Hydraulic binder****EP1520843** ---