| Patents for C04B 20 - Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups  and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups  specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials (4,429) | 
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| 04/14/1991 | CA2027654A1 Method for the preparation of a fine-grained mixture having hydrophobic properties | 
| 04/09/1991 | CA1282556C Concrete and aggregate benefaction technology | 
| 04/04/1991 | WO1991004093A1 Process for the treatment of pulverulent materials, mineral or organic, by thermosetting compounds | 
| 03/26/1991 | US5002696 Nonporous, density stable in liquid systems | 
| 03/21/1991 | DE3929703A1 Gypsum component esp. board mfr. - with water supplied as ice-contg. reinforcing component | 
| 03/20/1991 | EP0418108A1 Process for and products obtained by mixing cement and reinforcing fibers | 
| 03/20/1991 | EP0417756A2 Method for manufacturing a porous body of molybdenum silicide | 
| 03/19/1991 | US5000980 Process for coating fibers and applications thereof to the production of composite materials | 
| 03/19/1991 | CA1281545C Treatment of expansible materials to form lightweight aggregate | 
| 03/19/1991 | CA1281506C Lightweight aggregate having high resistance to water absorption and process for preparation thereof | 
| 03/13/1991 | EP0205588B1 Process for preparing metal-coated hollow microspheres | 
| 03/12/1991 | CA1281176C Fibrous white electrically conductive material and a white electrically conductive coating composition containing the same | 
| 03/07/1991 | CA2024695A1 Cement and reinforcing fibre mixture, process for making such mixture and articles thereof | 
| 02/21/1991 | WO1991001951A1 Method for preparing a resin concrete | 
| 02/06/1991 | EP0245326B1 Improvements relating to hydraulic binders | 
| 02/05/1991 | US4990292 Method for producing carbon fiber-reinforced gypsum models and forming molds | 
| 01/29/1991 | US4988390 Method for production of inclusion water for hardening gypsum, method for production of shaped article of gypsum, and shaped article of gypsum | 
| 01/29/1991 | CA1279746C Crosslinking polysilazane composition, in which the hydrosilylation reaction is catalysed by a metal or a metallic compound | 
| 01/23/1991 | EP0409787A1 Dry mixture for epoxy cement concrete | 
| 01/23/1991 | EP0409751A1 New granulates and building materials, concrete pastes ready for use and construction elements obtained from these pastes | 
| 01/21/1991 | CA2021412A1 Dry mixture for epoxy cement concrete | 
| 01/15/1991 | CA1279033C Producing composite materials from high voltage electrostatically charged fibres by impregnation | 
| 01/09/1991 | EP0406278A1 Process for producing fluorescent or phosphorescent pigments coated with glass. | 
| 01/01/1991 | US4981518 Bonded composite structure and method of making | 
| 12/25/1990 | US4979992 Compact reinforced composite | 
| 12/19/1990 | EP0403432A2 Pearlescent coating compositions | 
| 12/18/1990 | CA1278000C Cement products containing surface treated inorganic particulates | 
| 12/13/1990 | WO1990012906A3 Reinforcing and/or process fibres based on vegetable fibres, process for producing them and their use | 
| 12/12/1990 | EP0377718A4 Incineration residue treatment process and apparatus | 
| 12/04/1990 | US4974522 Cold-molded cementitious composites reinforced with surface-modified polyamide fibres and method of preparing same | 
| 11/29/1990 | WO1990014319A1 High strength structural perlite concrete | 
| 11/28/1990 | EP0399585A1 Process for the manufature of solid aggregates from compact mineral slurries | 
| 11/22/1990 | EP0398410A1 Process for immobilizing environmentally noxious metals and organic substances | 
| 11/22/1990 | DE4014891A1 Verfahren zur herstellung von buendeln von stahldrahtstuecken Process for the preparation of bundles of stahldrahtstuecken | 
| 11/15/1990 | WO1990013524A1 Shaped article with a cement-bound matrix and method and composition for the preparation thereof | 
| 11/14/1990 | EP0396975A2 Process for colouring building materials | 
| 11/14/1990 | CN1046923A Dry grouting agent and method of producing same | 
| 11/13/1990 | CA1276188C Cementitious mixes | 
| 11/13/1990 | CA1276087C Cement reinforcement | 
| 11/07/1990 | EP0395743A1 Filler for a building material. | 
| 11/07/1990 | EP0268645B1 Process for colouring concrete | 
| 10/31/1990 | EP0395165A2 Method for disposing of rest material by incorporating it in shaped articles and shaped articles manufactured according to the method | 
| 10/24/1990 | CA2015128A1 Method for disposing of rest material by incorporating it in shaped articles and shaped articles manufactured according to the method | 
| 10/23/1990 | US4964913 High bending strength, large impact strength hydraulic substances reinforced with acrylonitrile fibers and a process for production thereof | 
| 10/18/1990 | WO1990012906A2 Reinforcing and/or process fibres based on vegetable fibres, process for producing them and their use | 
| 10/18/1990 | CA2029891A1 Reinforcement fibers and/or process fibers based on plant fibers, method for their production, and their use | 
| 09/20/1990 | DE3908172A1 Porous mineral light-weight aggregate granulate and process for the production thereof | 
| 09/19/1990 | EP0387825A2 Weighted reinforcing fibre and mixture for fibre reinforced building materials, process for their fabrication and use | 
| 09/19/1990 | EP0387251A1 Use of fillers coated with trialkoxysilanes | 
| 09/11/1990 | US4956403 Suppression of pressure water absorption of lightweight aggregate by aqueous dispersion therein of anionic polymers | 
| 09/11/1990 | US4956321 Insulation, treatment of the surface with acid to form neutral sites on the calcium silicate | 
| 09/04/1990 | US4954134 Agglomeration of gypsum, limestone, or gypsum-limestone mix | 
| 08/30/1990 | DE4005149A1 Verbesserte puzzolanische zubereitungen Improved pozzolanic preparations | 
| 08/24/1990 | CA2010816A1 Pozzolanic compositions | 
| 08/14/1990 | US4948763 Preparation of hollow ceramic fibers | 
| 08/08/1990 | EP0380704A1 Cement/asphalt mixture and process for its production | 
| 08/07/1990 | US4946505 Mixing pigment containing granules with cement, binders and water | 
| 08/01/1990 | CN1044270A Production of ceramics contg. expansible quartz sand | 
| 07/24/1990 | US4943544 High strength, abrasion resistant refractory castable | 
| 07/24/1990 | US4943233 Use of dewatered digested sewerage sludge as the bloating agent | 
| 07/18/1990 | EP0377718A1 Incineration residue treatment process and apparatus. | 
| 06/28/1990 | WO1990006902A1 Fibres and material comprising same | 
| 06/26/1990 | US4936384 To control lost circulation, to improve compressive strength and water permeability in geothermal and oil wells | 
| 06/20/1990 | EP0373426A2 Inorganic pigments coated with polyorganosiloxane | 
| 06/13/1990 | CA2005152A1 Inorganic pigments having improved properties | 
| 06/12/1990 | US4933109 Alkali titanate coated with tin oxide | 
| 06/12/1990 | US4932862 Suspended gas reactor | 
| 06/05/1990 | US4931211 Process of expanding obsidian | 
| 05/16/1990 | CN1042139A Mine expansion fire stopping-up material | 
| 05/09/1990 | EP0366893A1 Fire resistant wall board | 
| 04/25/1990 | EP0365046A1 Process for colouring concrete | 
| 04/19/1990 | DE3834751A1 Process for producing light-weight aggregates having a low density | 
| 04/18/1990 | EP0363707A2 Method for making a needled felt from slag wool | 
| 04/12/1990 | DE3834494A1 Process for producing binder for mortar or concrete production | 
| 04/11/1990 | EP0362345A1 Coloured stearates | 
| 04/10/1990 | US4916171 Polymers comprising alkali-insoluble core/alkali-soluble shell and copositions thereof | 
| 04/10/1990 | US4916012 Cement reinforcing fiber | 
| 04/10/1990 | US4915741 Workability, water retention | 
| 04/10/1990 | US4915739 Modified carbon fiber reinforced cement | 
| 04/04/1990 | EP0361181A2 Infusibilization of organic silazane polymers and preparation of hollow ceramic fibers | 
| 03/22/1990 | WO1990002779A1 Use of fillers coated with trialkoxysilanes | 
| 03/22/1990 | WO1990002714A1 Method and preparation for producing concrete | 
| 03/20/1990 | US4910076 Reinforced by network of fibers impregnated with a resin | 
| 03/20/1990 | US4909848 Silicon coated cement particles | 
| 03/06/1990 | US4906183 Treatment of expansible materials to form lightweight aggregate | 
| 02/27/1990 | US4904709 Textured exterior surface treatment | 
| 02/27/1990 | US4904416 Cement solidification treatment of spent ion exchange resins | 
| 02/22/1990 | WO1990001469A1 Cement/asphalt mixture and process for its production | 
| 02/20/1990 | US4902537 Cooating or impregnating with an emulsion of epoxy resin and colloidal silica | 
| 02/20/1990 | US4902347 Polyamide fibers, microsilica and Portland cement composites and method for production | 
| 02/07/1990 | EP0353860A2 Expanded mineral particles and apparatus and method of production | 
| 02/07/1990 | EP0190286B1 Hollow microspheres made from dispersed particle compositions and methods and apparatus for producing them | 
| 01/31/1990 | CN1039236A Prescription and technology for making fibre-reinforced cement tile and board with vinylon instead of asbestos | 
| 01/30/1990 | CA1264905A1 Hollow microspheres made from dispersed particle compositions | 
| 01/18/1990 | DE3921278A1 Process for producing shaped ceramic parts | 
| 01/18/1990 | DE3822759A1 Process for treating paper and/or cutting and/or planing chippings or shavings and/or wood fibres or the like and for producing mouldings, in particular boards, from a mixture of gypsum and fibrous material | 
| 01/10/1990 | EP0223832B1 Coated glass microbubbles | 
| 01/03/1990 | EP0348565A1 Polymers comprising alkali-insoluble core/alkali-soluble shell and compositions thereof | 
| 12/26/1989 | US4889878 Self-leveling, moisture curable polysiloxanes; fillers, diamidovinyl silanes, aminoxysilanes | 
| 12/13/1989 | CN1006060B Superlight ceramsites and their compounding process |