SiO2 mikrodulkių poveikis dujų cementbetonio, su mišria rišamąja medžiaga, stipruminėms savybėms

Abstract

Autoklaviniu akytuju betonu (AAC) gamybos metu naudojant tam tikras gamybos atliekas galima pagerinti jo stiprumines savybes. Gamybos atliekos naudojamos pakankamai mažais kiekiais ir ju kaina n ra didel , tod l galima pagerinti AAC stiprumines savybes pakankamai mažomis išlaidomis. Šiame darbe tirtas SiO2 mikrodulkiu (SM) poveikis AAC, su mišria rišamaja medžiaga, stiprumin ms savyb ms. Tirti keturiu sud ciu bandiniai: kontrolinis (be SM priedo), su 0,5 % SM, su 1,0 % SM ir su 1,5 % SM. Darbe aprašyta sud ties skaiciavimo bei bandiniu formavimo metodika. Pateikti gniuždymo stiprio rezultatai,gauti atlikus gniuždymo stiprio bandyma (buvo gniuždomi 70x70x70 mm bandiniai) presu. Pagal standarta LST 1469, naudojant gautus gniuždymo stiprio rezultatus, pagal empirines lygtis, apskaiciuotos lenkimo stiprio bei tempimo stiprio reikšm s. Gauti eksperimentiniai rezultatai apdoroti programa „STATISTICA“ ir gauta gniuždymo stiprio priklausomyb nuo tankio bei SM priedo kiekio.

Using certain production wastes can be improved strength characteristics of autoclaved cellular concrete (AAC). Since production wastes are used in sufficiently small quantities and their price is not high, it is possible to improve strength characteristics of AAC in sufficiently low cost. In this work the impact of silica fume on strength characteristics of AAC with composite binder material was investigated. There were samples of four compositions: comparative (without ANS), with 0,5% ANS, with 1,0% ANS and with 1,5% ANS. In this article composition calculation and formation methods of samples are described. Compressive strength results obtained by compressing samples (70 mm x 70 mm x 70 mm. Bending strength and tension strength values were calculated according to standard LST 1469 using received compressive strength results. Results were processed with programme STATISTICA and it was obtained the dependence on compressive strength of density and amount of ANS supplement.