"Special Fibre-cement Mortar for Outer Cementation of Conduit"@en . . "Speci\u00E1ln\u00ED vl\u00E1knocementov\u00E1 malta pro vn\u011Bj\u0161\u00ED cementaci potrub\u00ED" . "I" . . . . . . "The aim of the paper was to solve the problem with formula for outer cementation of pipeline. The cementation of pipeline serves as an insulation and mechanical protection of steel pipes. Special design allows direct use of pipe for trenchless horizontal pushing-through. The cementation is a mortar mixture that is laid on outer surface of pipe by pressure pump and fixed by coil of woven polypropylene fabric. In terms of material it is superplasticized fibre-cement mortar. This mortar is made according to company standard that comes from demands of German Technical and Scientific Association for Gas and Water (DVGW) GW-340. Because the right formula from the past is no longer suitable to meet requirements for compressive strength, it was necessary to adjust this formula. This paper deals with finding the causes of decline in strength and a solution to this problem. Defoaming of fresh mortar mixture caused by inappropriate combination of chemical admixtures was found to be the main reason of decline in strength of the material. ISBN 978-80-87397-11- 4"@en . "3"^^ . . . "RIV/26232511:_____/12:ROZVOJ44!RIV13-MPO-26232511" . "3"^^ . . "Persa\u0148, Vladim\u00EDr" . "Ne\u010Das, Radovan" . . "Speci\u00E1ln\u00ED vl\u00E1knocementov\u00E1 malta pro vn\u011Bj\u0161\u00ED cementaci potrub\u00ED"@cs . "[6B1D24967B22]" . . "RIV/26232511:_____/12:ROZVOJ44" . . . "Boh\u00E1\u010D, Martin" . "cement; fibre-cement mortar; chemical admixtures; strength"@en . "Speci\u00E1ln\u00ED vl\u00E1knocementov\u00E1 malta pro vn\u011Bj\u0161\u00ED cementaci potrub\u00ED" . . "V p\u0159\u00EDsp\u011Bvku se popisuje \u0159e\u0161en\u00ED probl\u00E9mu s recepturou pro vn\u011Bj\u0161\u00ED cementaci potrub\u00ED. Cementace potrub\u00ED slou\u017E\u00ED k izolaci a mechanick\u00E9 ochran\u011B ocelov\u00FDch trubek. Speci\u00E1ln\u00ED proveden\u00ED umo\u017E\u0148uje p\u0159\u00EDm\u00E9 pou\u017Eit\u00ED trubky k bezv\u00FDkopov\u00E9mu horizont\u00E1ln\u00EDmu protla\u010Dov\u00E1n\u00ED. Jde o sm\u011Bs malty, kter\u00E1 je nan\u00E1\u0161ena na vn\u011Bj\u0161\u00ED povrch trubky tlakovou pumpou a je zaji\u0161\u0165ov\u00E1na ovinem tkanou polypropyl\u00E9novou tkaninou. Z hlediska materi\u00E1lu jde o plastifikovanou vl\u00E1kno-cementovou maltu, kter\u00E1 se vyr\u00E1b\u00ED dle podnikov\u00E9 normy, kter\u00E1 vych\u00E1z\u00ED z po\u017Eadavk\u016F n\u011Bmeck\u00E9ho p\u0159edpisu Spolku stavitel\u016F vodovod\u016F a plynovod\u016F (DVGW) GW-340. Proto\u017Ee v minulosti vhodn\u00E1 receptura p\u0159estala spl\u0148ovat n\u00E1rok na pevnost v tlaku, bylo nutn\u00E9 recepturu upravit. \u010Cl\u00E1nek se zab\u00FDv\u00E1 hled\u00E1n\u00EDm p\u0159\u00ED\u010Diny poklesu pevnost\u00ED a \u0159e\u0161en\u00EDm tohoto probl\u00E9mu. ISBN 978-80-87397-11- 4" . . "Speci\u00E1ln\u00ED vl\u00E1knocementov\u00E1 malta pro vn\u011Bj\u0161\u00ED cementaci potrub\u00ED"@cs . . "V p\u0159\u00EDsp\u011Bvku se popisuje \u0159e\u0161en\u00ED probl\u00E9mu s recepturou pro vn\u011Bj\u0161\u00ED cementaci potrub\u00ED. Cementace potrub\u00ED slou\u017E\u00ED k izolaci a mechanick\u00E9 ochran\u011B ocelov\u00FDch trubek. Speci\u00E1ln\u00ED proveden\u00ED umo\u017E\u0148uje p\u0159\u00EDm\u00E9 pou\u017Eit\u00ED trubky k bezv\u00FDkopov\u00E9mu horizont\u00E1ln\u00EDmu protla\u010Dov\u00E1n\u00ED. Jde o sm\u011Bs malty, kter\u00E1 je nan\u00E1\u0161ena na vn\u011Bj\u0161\u00ED povrch trubky tlakovou pumpou a je zaji\u0161\u0165ov\u00E1na ovinem tkanou polypropyl\u00E9novou tkaninou. Z hlediska materi\u00E1lu jde o plastifikovanou vl\u00E1kno-cementovou maltu, kter\u00E1 se vyr\u00E1b\u00ED dle podnikov\u00E9 normy, kter\u00E1 vych\u00E1z\u00ED z po\u017Eadavk\u016F n\u011Bmeck\u00E9ho p\u0159edpisu Spolku stavitel\u016F vodovod\u016F a plynovod\u016F (DVGW) GW-340. Proto\u017Ee v minulosti vhodn\u00E1 receptura p\u0159estala spl\u0148ovat n\u00E1rok na pevnost v tlaku, bylo nutn\u00E9 recepturu upravit. \u010Cl\u00E1nek se zab\u00FDv\u00E1 hled\u00E1n\u00EDm p\u0159\u00ED\u010Diny poklesu pevnost\u00ED a \u0159e\u0161en\u00EDm tohoto probl\u00E9mu. ISBN 978-80-87397-11- 4"@cs . . "170242" . . "Special Fibre-cement Mortar for Outer Cementation of Conduit"@en .