Mechanical Properties ea Basalt Fiber chopped likhoele Concrete
SEHLAHLISO SEBAKA
Konkreite, e le thepa ea mohaho e sebelisoang haholo ho boenjiniere ba sechaba, e na le thepa e ntle ea mechine, empa ka ho teba ho tsoelang pele ha tšebeliso ea theknoloji ea boenjiniere, mefokolo ea thepa ea eona ea motheo ea mechine e pepesoa butle-butle. Ka lebaka la litšoaneleho tse tlase tsa matla a matla a karolo ea leshome feela ea matla a ho hatella, ho fella ka hore litho tsa ts'ebetso ea tsitsipano li tloaelehe ho phunyeha, e leng ho fokotsang ka ho toba ho tšoarella ha likaroloana, ho fokotsa boholo ba ts'ebeliso ea lisebelisoa. Thepa ea Konkreites. Ho ntlafatsa litšoaneleho tsa ts'ebetso ea boenjiniere ba konkreite le ho rarolla mathata ts'ebetsong ea konkreite, litsebi li 'nile tsa ntlafatsa ts'ebetso ealisebelisoa tsa konkreite ka lilemo tse ngata 'me ba fihletse liphetho tsa mohato ka mohato, joalo ka ho eketsoa ha li-admixtures, ho lokisa karolelano ea ho kopanya, ho ntlafatsa ts'ebetso ea tlhahiso le mekhoa ea tlhokomelo.
1. Lisebelisoa tsa liteko le mekhoa ea teko
P. O 42.5 samente e tloaelehileng ea silicate e ile ea khethoa, e nang le matla a 28d a hatellang a 48.3MPa le 28d matla a flexural a 8.2MPa. lehlabathe le mahareng le nang le modulus ea fineness ea 2.5-2.6 le sebelisitsoe e le kakaretso e ntle, e nang le boima bo hlakileng ba 1996kg/m3. lejoe le sa khaotseng le pentiloeng la 5-27mm le ne le sebelisoa e le kakaretso e mahoashe, 'me boima ba bona bo bonahala ba 2737kg/m3. Sekhahla sa phokotso ea metsi sa 40% se sebelisitsoe. Ho ile ha sebelisoa 40% ea Sika polycarboxylic acid e sebetsang hantle haholo e fokotsang metsi. Bolelele ba likhoele tse khaotsoeng ka fiber ea basalt hoo e ka bang 30mm, bophara ba monofilament ke hoo e ka bang 15um, boima ke 2.7g / cm3, modulus ea elasticity ke 95-120MPa, matla a ho tsitsa ke 3300-4500MPa, 'me nako ea khefu ke hoo e ka bang 2.5-30.
Lintho tse loketseng tse sebelisitsoeng tekong ena li bontšoa ho Lethathamo la 1. Teko ea khatello e kenngoa ts'ebetsong ho ea ka Standard for Test Methods of Mechanical Properties of Ordinary Concrete. Teko ea compressive e nka 100 × 100 × 100mm li-cubic specimens, mehlala e 3 sehlopheng ka seng, pheko e tloaelehileng ea 28d.
| Lethathamo la 1Palo ea thepa e sebelisetsoang ho lokisa lihlopha tse fapaneng tsa mehlala | ||||||||
| Nomoro ea letoto | Likahare tsa fiber | Bongata ba thepa e sebedisoang | ||||||
| Ntho | V(%) | M(kg/m3) | konkreite | molora oa mashala | lehlabathe | lejoe | metsi | se fokotsang metsi |
| S0 | 0 | 0 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
| S1 | 0.1 | 2.65 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
| 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 |
| S2.5 | 0.25 | 6.625 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
| S3 | 0.3 | 7.95 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
| S3.5 | 0.35 | 9.9275 | 420 | 60 | 656 | 1069 | 210 | 2.4 |
2. Tke mehato
(1) pele hlakola sengoathoana sa teko ho lekoa ka mor'a ho hlahloba ponahalo le ho lekanya boholo, bo nepahetseng ho 'na. Ho se leka-lekane ha sebaka sa ho beha mohlala ho fihla ho 100mm, phoso ha e fete 0.5mm, 'me sebaka sa ho jara le se haufi le se se nang perpendicularity ha sea lokela ho ba se seholo ho feta litlhoko tsa tekanyo ea 1 degree;
(2) mohlala oa mochine oa teko o tsamaellanang le bohareng ba poleiti ea khatello tlas'a mochine oa teko. Bula mochine oa teko, ha letlapa le ka holimo-khatello le sekhechana sa teko se koala, lokisa tšehetso, e le hore matla a tšoane;
(3) ts'ebetso ea ho roala ho boloka mokhoa o tsoelang pele le o ts'oanang, lebelo la ho laela teko le nka 12kN / s-18kN / s; (4) rekota boima bo boholo, bo nepahetseng ho 0.1MPa.
3. Liphetho tsa liteko le tlhahlobo
Joalokaha ho ka bonoa ho Lethathamo la 2, matla a 7d a hatellang a konkreite ka keketseho ea Basalt likhoele li hlahisa litšoaneleho tse sa fetoheng ho fokotseha butle butle, e leng haholo-holo ka lebaka la ho eketsoa ha likhoele tsa basalt, likhoele le samente tse entsoeng ka har'a sehokelo ho hlahisa bokaholimo bo fokolang, 'me ka keketseho ea bongata ba fiber e kopanyang, mofuta ona oa sebaka se fokolang se ntse se eketseha, kahoo matla a ho hatella a cubic ka tlhaho a ntse a fokotseha. Matla a 28d a hatellang a konkreite ka keketseho ea tekanyo ea fiber ea basalt e bonts'a mokhoa oa ho eketseha pele ebe o fokotseha, lebaka la keketseho ena ea pele ke palo e nyane ea doped.likhoele tsa basalt phetha karolo ea ho hokahanya ho isa bohōleng bo itseng ho fokotsa shrinkage deformation ea konkreite ka boeona, ha ka nako e tšoanang eketsa sebaka se fokolang se amanang le ho eketseha ha matla a 28d ho ba ngata ka tlaase ho moo, e leng ts'ebetsong ea kakaretso ea ho eketseha ha matla.
| Letlapa la 2 Likhakanyo tsa teko ea matla a khoheli | |||
| Nomoro ea letoto | Likahare tsa fiber | Cubic compressive matla | |
| Ntho | V(%) | 7d | 28d |
| S0 | 0 | 40.7 | 48.9 |
| S1 | 0.1 | 41.3 | 53.1 |
| S1.5 | 0.15 | 39 | 51.4 |
| S2 | 0.2 | 36.6 | 45.5 |
| S2.5 | 0.25 | 29.2 | 43.1 |
| S3 | 0.3 | 25.8 | 42.5 |
| S3.5 | 0.35 | 31.2 | 42.3 |
4. Sephetho
Ho ea ka pono ea matla a ho hatella a li-cubic, ha motsoako oa faeba oa basalt o fihla ho hoo e ka bang 1-1.5% ka liperesente tsa molumo, matla a 7d le 28 cubic compressive a shortcut. fiber ea basalt konkreite li eketseha ho isa tekanyong e itseng ha li bapisoa le tsa konkreite ntle le motsoako oa fiber.
