CS262775B1 - Process for preparing polymercementary mixtures - Google Patents
Process for preparing polymercementary mixtures Download PDFInfo
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- CS262775B1 CS262775B1 CS873609A CS360987A CS262775B1 CS 262775 B1 CS262775 B1 CS 262775B1 CS 873609 A CS873609 A CS 873609A CS 360987 A CS360987 A CS 360987A CS 262775 B1 CS262775 B1 CS 262775B1
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Abstract
Spůsob výroby polymércementových zinesí na báze reaktoplastov vhodných pre sánému a ochranu betonových a ocelových konštrukcii sa vyznačuje zlepšenými fyzikálno-mechanickými vlastnosťami, ako je pevnost v tlaku, pevnost v tahu za ohybu, adhéznymi vlastnosťami a zvýšenou trvanlivosťou. Okrem stavebníctva je možno polymércementové zmesi používat aj na ochranu polnohospodárskych objektov apod.The production method of polymer cement cements based on thermosetting plastics suitable for sleds and protection of concrete and steel construction is characterized by improved physico-mechanical properties like compressive strength, bending tensile strength adhesion properties and increased durability. In addition to construction, it is possible to use polymer cement use mixtures for protection agricultural objects, etc.
Description
Vynález sa týká sposobu výroby polyméreementových zmesi na báze reaktoplastov, so zlepšenými fyzikálne-mechanickými vlastnostami, vhodné pre sanáciu a ochranu betonových a ocelových konštrukcii.The invention relates to a process for the production of thermosetting polymer-based mixtures with improved physical-mechanical properties suitable for the rehabilitation and protection of concrete and steel structures.
Cielom modifikácií cementových mált na báze reaktoplastov je Iepšia spracovatelnosť, vyššie ohybové vlastnosti a přilnavost, zvýšená odolnost voči chemickým vplyvom a odolnost voči obrusu. Pri spracovaní polymér-cementových mált dochádza po stránke koloido-fyzikálnej k zvláštnym javom. Disperzná fáza v priebehu času mění svoju povahu napr. keď vo vodě dis pergované čiastočky epoxidovej živice vytvrdnú na duroplast. Pri zmiešaní epoxidovej emulzie s cementovou suspenziou prebiehajú súčasne dva procesy, t. j. tvrdnutie epoxidovej živice a hydratácia cementu. Ak sú přítomné v zmesi emulgátory a organické riedidlá tieto negativné ovplyvňujú proces hydratácie a v konečnoni důsledku vlastnosti polymércementovej zmesi (lj. Napr. pri používaní přísady komerčnej epoxidovej emulzii o obsahu epoxi skupin 0,42 do cementovej malty, pri obsahu epoxidu 3,66 % z hmotnosti cementu, nastáva pokles v tlaku a v tahu za ohybu o 18 až 40 % v porovnaní s cementovou maltou bez přísady.Modifications of cement-based mortars based on thermosetting plastics aim at better processability, higher flexural properties and adhesion, increased resistance to chemical influences and abrasion resistance. There are special phenomena in the processing of polymer-cement mortars in terms of colloid-physical. The dispersion phase changes its nature over time, e.g. when the water-dispersed epoxy resin particles cure to a duroplast. When mixing the epoxy emulsion with the cement slurry, two processes take place simultaneously, i. j. hardening of epoxy resin and hydration of cement. If emulsifiers and organic diluents are present in the mixture, these adversely affect the hydration process and ultimately due to the properties of the polymer cement mixture (i.e., when using a commercial epoxy emulsion containing 0.42 epoxy groups in cement mortar, with an epoxy content of 3.66%). weight of cement, there is a decrease in compression and tensile bending of 18 to 40% compared to cement-free mortar without additive.
Uvedené nedostatky odstraňuje spósob výroby polymércementových zmesi podlá vynálezu. Principem nového spósobu je, že používá pre výrobu polymércementových zmesi namiesto reaktoplastov vo formě emulzíí, reaktoplasty vo formě živíc a to tak, že sa najskór zmiešajú suché zložky zmesi, t. j. cement a piesok so zámesovou vodou, do ktorej sa vopred přidalo tvrdidlo. Vlastnosti po 2-8 dňoch:These drawbacks are overcome by the process for producing the polymer cement blends of the present invention. The principle of the novel process is to use resin-based thermosetting plastics instead of thermosetting plastics instead of thermosetting plastics by first mixing the dry components of the mixture, i. j. cement and sand with mixing water to which a hardener has been added beforehand. Features after 2-8 days:
S přísadou EPWith EP additive
Po dokonalej homogenizácii sa za stálého miešania přidává příslušné množstvo živice. V případe používania zmesi o tekutej výroby zmesi len časť zámesovej vody zmiešanej s tvrdidlom a zbytok vody sa přidává až po homogenizácii reaktoplastu so zmesou. Používáním nového spósobu výroby polymércementových zmesi na báze reaktoplastov sa dosiahlo zvýšenie fyzikálne-mechanických vlastností ako je pevnost v. tlaku, pevnost v tahu za ohybu a pevnost v ohybe úderom a pevnost' v adhézii k podkladu o 15 až 30 °/o. Technologický postup nanášania polymércementovej malty o betonový podklad spočívá v úpravě povrchu betonu mechanickým očistěním a v nanášaní polymércementového pačoku na povrch betonu. V ďalšom sa nanáša vrstva polymércementovej zmesi na báze reaktoplastu o vyšších fyzikálne-mechanických vlastnostiach.After thorough homogenization, the appropriate amount of resin is added with stirring. In the case of using a mixture of liquid manufacture of the mixture, only a part of the mixing water mixed with the hardener and the rest of the water are added after homogenization of the thermosetting plastics with the mixture. The use of a novel process for the production of thermosetting polymer-based blends has resulted in an increase in physico-mechanical properties such as tensile strength. compressive strength, flexural tensile strength and impact bending strength and adhesion strength to the substrate of 15-30%. Technological process of application of polymer-cement mortar on concrete substrate consists in treatment of concrete surface by mechanical cleaning and in application of polymer-cement screed on concrete surface. Next, a thermosetting polymer-based polymer blend layer with higher physico-mechanical properties is applied.
Příklad spósobu výroby vysprávkovej polymércementovej malty na báze reaktoplastu·.Example of production method of repair polymer based mortar based on thermosetting plastics.
% hmotnostných portlandského cementu sa zmieša s 63 % hmotnostných křemenného piesku. Do 8 % hmotnostných zámesovej vody sa přidá 0,22 % hmotnostných dietyléntriamínu a po zmiešaní oboch zložiek sa táto zmes zmieša so suchými zložkami, t. j. so zmesou cementu a piesku. K tej-to zmesi sa za stálého miešania přidává 1,85 % hmotnostných epoxidovej živice o obsahu epoxi skupin 0,5. Po dokonalom zhomogenizovaní zmesi sa přidá 5,93 % hmotnosti zámesovej vody za stálého miešania.% Portland cement by weight is mixed with 63% quartz sand. 0.22% by weight of diethylenetriamine is added to 8% by weight of the mixing water, and after mixing the two components, this mixture is mixed with the dry components, i. j. with a mixture of cement and sand. To this mixture, 1.85% by weight of an epoxy resin containing 0.5 epoxy groups is added with stirring. After the mixture is completely homogenized, 5.93% by weight of the mixing water is added with stirring.
Bez přísadyNo additive
Pevnost v tlaku v MPa 25,9Compressive strength in MPa 25.9
Pevnost v tahu za ohybu v MPa 6,6Tensile bending strength in MPa 6.6
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS873609A CS262775B1 (en) | 1987-05-19 | 1987-05-19 | Process for preparing polymercementary mixtures |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS873609A CS262775B1 (en) | 1987-05-19 | 1987-05-19 | Process for preparing polymercementary mixtures |
Publications (2)
Publication Number | Publication Date |
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CS360987A1 CS360987A1 (en) | 1988-08-16 |
CS262775B1 true CS262775B1 (en) | 1989-04-14 |
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Application Number | Title | Priority Date | Filing Date |
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CS873609A CS262775B1 (en) | 1987-05-19 | 1987-05-19 | Process for preparing polymercementary mixtures |
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CS (1) | CS262775B1 (en) |
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1987
- 1987-05-19 CS CS873609A patent/CS262775B1/en unknown
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CS360987A1 (en) | 1988-08-16 |
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