Strjevanje apnene injekcijske mešanice pri običajnem in omejenem dostopu ogljikovega dioksida : diplomska naloga

Gorišek, Matej (avtor), Bokan-Bosiljkov, Violeta (mentor), Štukovnik, Petra (komentor)

Namen diplomske naloge je bil spremljati potek karbonatizacije in mehanskih lastnosti vzorcev apnene injekcijske mešanice. Apneno injekcijsko mešanico izbrane sestave smo vgradili v standardne kalupe z dimenzijami 40 mm x 40 mm x 160 mm. Prizme smo po tednu dni razkalupili in jih izpostavili dvema različnima pogojema staranja. Polovico prizem smo pustili odležavati na zraku, polovico pa smo jih zaprli v posode s pokrovom iz apnenega ometa. Za namen diplomske naloge smo načrtovali in izdelali posode iz pleksi stekla ter lesen okvir pokrova z mrežico. V okvir smo nanesli sloj apnene malte in tako skušali simulirati vpliv apnenega ometa na zidu ali stropu. Pri treh različnih časih dležavanja prizem v posodi ali na zraku (1 mesec, 2 meseca in 3 mesece) smo na prizmah opravili upogibne in tlačne preiskave ter fenolftaleinski test, s pomočjo katerega spremljamo napredovanje procesa karbonatizacije. Vsak mesec smo odprli po eno posodo in opravili preiskave na prizmah iz posode, vzporedno s preiskavami prizem, ki so odležavale na zraku. Dobljene rezultate tlačne trdnosti, upogibne natezne trdnosti ter fenolftaleinskega testa smo analizirali in naredili primerjavo med mehanskimi lastnostmi in stopnjo karbonatizacije. Ugotovili smo, da je napredovanje karbonatizacije v posodah z omejenim dotokom CO2 zelo počasno. Rezultati mehanskih lastnosti trdnosti kažejo, da so bile pri vseh starostih povprečne vrednosti upogibne natezne trdnosti in tlačne trdnosti prizem v posodi manjše, kot pa mehanske trdnosti prizem, ki so odležavale na zraku. Po prvem mesecu fenolftaleinski test na prizmah v posodi ni pokazal karbonatizacije. Kljub temu je injekcijska mešanica dosegla relativno visoko trdnost. Domnevamo, da so obljeni rezultati posledica vpliva kombinacije sušenja prizem in alkalno-karbonatne reakcije.

• Jezik: Slovenski jezik
• Ključne besede: apnena injekcijska mešanica, dolomitna moka, preiskave injekcijske mešanice, mehanske lastnosti, karbonatizacija
• Vrsta gradiva: Diplomsko delo/naloga
• Tipologija: 2.11 - Diplomsko delo
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Založnik: [M. Gorišek]
• Leto izida: 2016
• PID: 20.500.12556/RUL-94402
• UDK: 624.138.24(043.2)
• COBISS.SI-ID: 8124001
• Datum objave v RUL: 18.08.2017

GORIŠEK, Matej, 2016, Strjevanje apnene injekcijske mešanice pri običajnem in omejenem dostopu ogljikovega dioksida : diplomska naloga [na spletu]. Diplomsko delo. M. Gorišek. [Dostopano 21 april 2025]. Pridobljeno s: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=slv&id=94402

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Hardening of lime injection grout at normal and restricted access of carbon dioxide : Graduation thesis

Izvleček

The purpose of the thesis is to monitor carbonation process and mechanical characteristics of lime injection grouts. Lime grout with selected composition was cast in standard prisms of 40 mm x 40 mm x 160 mm. The prisms were demoulded after 7 days and after that they were exposed to different ageing conditions. First, one half of the prisms were exposed to the laboratory ambient conditions (air) and the second half were put into containers with a cover made of lime mortar. Especially for the purpose of the diploma thesis Plexiglas containers were designed and produced, along with a wooden frame and a net, as supporting system for the lime render which acts as the cover. The lime render cover simulates lime render or plaster on wall or ceiling. In different time periods (1M, 2M, 3M, i.e. one months, two months and three months after demoulding of the prisms), we performed flexural and compressive tests on the prisms as well as a phenolphthalein test for monitoring the carbonation process. Every month, we opened one container and performed the tests on the prisms from the container, parallel to the tests carried out on air-dried prisms. The obtained results were analysed and comparison between mechanical properties and carbonisation depth was made. We established that the carbonization process in the containers with a limited inflow of CO2 is very slow. The results of mechanical tests show that in all time periods, the obtained average values of flexural tensile strength, as well as the compressive strength of the prisms dried in the container, were lower than the same characteristics of air-dried prisms. After the first month phenolphthalein test carried out on the prisms aged in the container did not show start of carbonisation. However, the prisms showed, despite high humidity in the container, an increase in mechanical characteristics. We presume that the obtained results are combination of two influencing parameters – drying of the prisms and start of alkali carbonate reaction.

• Ključne besede: lime injection grout, dolomite filler, test of injection grout, mechanical properties, carbonization