Mechanical Properties of Basalt Fiber oqoshiwe imicu Concrete
ISINGENISO SOMKHIQIZO
Ukhonkolo, njengempahla yokwakha esetshenziswa kabanzi kwezobunjiniyela bomphakathi, inezakhiwo ezinhle zemishini, kodwa ngokujula okuqhubekayo kokusetshenziswa kobuchwepheshe bonjiniyela, ukushiyeka kwezakhiwo zayo eziyisisekelo zivezwa kancane kancane. Ngenxa yezimpawu eziphansi zamandla okuqina kwengxenye eyodwa kweshumi kuphela yamandla okucindezela, okuholela ekutheni amalungu enqubo ye-tensile athambekele ekuqhekekeni, okunciphisa ngokuqondile ukuqina kwezingxenye, ukunciphisa ububanzi bokusebenzisa Izinto zikakhonkolos. Ukuthuthukisa izici zokusebenza kobunjiniyela bokukhonkolo nokuxazulula izinkinga ekusetshenzisweni kokhonkolo, izazi bezilokhu zithuthukisa ukusebenza kweizinto zokukhonkolo iminyaka eminingi futhi bathole imiphumela yesiteji ngesiteji, njengokwengezwa kwe-admixtures, ukulungisa isilinganiso sokuxuba, ukuthuthukisa inqubo yokukhiqiza nezindlela zokulondoloza.
1. Izinto zokuhlola nezindlela zokuhlola
Kukhethwe usimende ojwayelekile we-silicate we-P. O 42.5, onamandla okucindezela angu-28d angu-48.3MPa kanye namandla angu-28d okuguquguquka angu-8.2MPa. isihlabathi esimaphakathi esine-fineness modulus engu-2.5-2.6 sisetshenziswe njenge-aggregate ecolekileyo, enobuningi obubonakalayo obungu-1996kg/m3. Itshe elichotshoziwe eliqhubekayo elingu-5-27mm lasetshenziswa njengesamba esimahhadla, elinobukhulu obungama-2737kg/m3. Kusetshenziswe izinga lokuncishiswa kwamanzi ngama-40%. Kusetshenziswe u-40% we-Sika polycarboxylic acid esebenza kahle kakhulu yokunciphisa amanzi. Ubude be imicu eqoshiwe ye-basalt fiber cishe i-30mm, ububanzi be-monofilament bungaba ngu-15um, ukuminyana kungu-2.7g/cm3, i-modulus of elasticity ingu-95-120MPa, amandla aqinile angama-3300-4500MPa, futhi ukuphakama ngesikhathi sekhefu cishe ku-2.5-30.
Ukulingana okufanelekile okusetshenziswe kulokhu kuhlolwa kuboniswa kuThebula 1. Ukuhlolwa kokucindezela kusetshenziswa ngokuya Ngezinga Lezindlela Zokuhlola Zezakhiwo Zemishini Yokhonkolo Ovamile. Isivivinyo esicindezelayo samukela ama-cubic specimens angu-100×100×100mm, amasampula ama-3 eqenjini ngalinye, ukuphulukisa okujwayelekile okungu-28d.
| Ithebula 1Inani lempahla esetshenziselwa ukulungiswa kwamaqembu ahlukene wezibonelo | ||||||||
| Inombolo yomkhiqizo | Okuqukethwe kwe-Fiber | Inani lempahla esetshenzisiwe | ||||||
| Into | V(%) | M(kg/m3) | ukhonkolo | umlotha wamalahle | isihlabathi | itshe | amanzi | isinciphisi samanzi |
| S0 | 0 | 0 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
| I-S1 | 0.1 | 2.65 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
| I-S1.5 | 0.15 | 3.975 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
| S2 | 0.2 | 5.3 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
| I-S2.5 | 0.25 | 6.625 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
| I-S3 | 0.3 | 7.95 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
| I-S3.5 | 0.35 | 9.9275 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
2. Tyizinyathelo
(1) qala usule ucezu lokuhlola oluzohlolwa ngemva kokuhlola ukubukeka nokulinganisa usayizi, olunembile kimi. Ukungalingani kwe-specimen bearing surface kufinyelela ku-100mm, iphutha alikho ngaphezu kuka-0.5mm, futhi indawo ethwalayo kanye ne-non-perpendicularity eseduze akufanele ibe nkulu kunezidingo zezinga le-1 degree;
(2) i-axis yesampula yomshini wokuhlola eqondaniswe nendawo ephakathi yepuleti lokucindezela ngaphansi komshini wokuhlola. Vula umshini wokuhlola, lapho ipuleti yokucindezela okuphezulu kanye nocezu lokuhlola luvala, lungisa ukusekelwa, ukuze amandla afanayo;
(3) inqubo yokulayisha ukuze kugcinwe ukuqhubeka nokufana, isivinini sokulayisha sokuhlola sithatha i-12kN / s-18kN / s; (4) rekhoda umthamo omkhulu, onembile ku-0.1MPa.
3. Imiphumela yokuhlolwa nokuhlaziya
Njengoba kungabonwa kuThebula 2, amandla okucindezela angu-7d kakhonkolo ngokunyuka kwe I-Basalt amafayibha aveza izici zokungaguquki ekuncipheni kancane kancane, okubangelwa ikakhulukazi ukwengezwa kwemicu ye-basalt, emicu nosimende okwakhiwa esixhunyweni esibonakalayo ukuze kukhiqizwe indawo ebuthakathaka, futhi ngokwanda kwenani lokuxuba i-fiber, lolu hlobo lwendawo ebuthakathaka luyaqhubeka nokwanda, ngakho amandla okucindezela ayi-cubic ngokwemvelo ayaqhubeka nokuncipha. Amandla okucindezela kakhonkolo angama-28d ngokukhuphuka komthamo we-basalt fiber akhombisa umkhuba wokukhuphuka kokuqala bese wehla, isizathu salokhu kwanda kokuqala yinani elincane le-doped.imicu ye-basalt dlala indima ekuxhumaniseni ngezinga elithile ekunciphiseni ukuwohloka kokuncipha kokhonkolo ngokwawo, kuyilapho ngesikhathi esifanayo ukwandisa indawo ebuthakathaka ehlobene nokwanda kwamandla angu-28d ukuze kube kuncane kakhulu, okuyinto ekusebenzeni jikelele kokwanda kwamandla.
| Ithebula 2 Amanani okuhlola amandla acindezelayo we-Cube | |||
| Inombolo yomkhiqizo | Okuqukethwe kwe-Fiber | Amandla okucindezela eCubic | |
| Into | V(%) | 7d | 28d |
| S0 | 0 | 40.7 | 48.9 |
| I-S1 | 0.1 | 41.3 | 53.1 |
| I-S1.5 | 0.15 | 39 | 51.4 |
| S2 | 0.2 | 36.6 | 45.5 |
| I-S2.5 | 0.25 | 29.2 | 43.1 |
| I-S3 | 0.3 | 25.8 | 42.5 |
| I-S3.5 | 0.35 | 31.2 | 42.3 |
4. Umphumela
Ngokombono wamandla okucindezela ayi-cubic, lapho isinqamuleli se-basalt fiber admixture sifinyelela cishe ku-1-1.5% ngephesenti levolumu, amandla okucindezela angu-7d nama-cubic angu-28 esinqamuleli. i-basalt fiber ukhonkolo anyuswa ngezinga elithile uma kuqhathaniswa nalokho kukakhonkolo ngaphandle kwe-fiber admixture.
