IFayibha ye-PVA eKhokela kwiNguqulelo yoShishino

Yintoni i I-PVA fiber?

Njengefayibha entsha eyenziweyo enamandla amakhulu kunye nemodyuli ephezulu enwebekayo, polyvinyl utywala (I-PVA) ifayibha inethemba elibanzi losetyenziso ekuphuculeni ukuxhathisa kokuqhekeka kunye nokugoba kokuqina kwekhonkrithi. Ikhonkrithi esebenza ngamandla ephezulu isetyenziswa kakhulu kulondolozo lwamanzi amakhulu kunye neeprojekthi zombane., Iibhulorho, koololiwe, amazibuko, izakhiwo eziphakamileyo, iindlela ezingaphantsi kunye neetonela. Ukusebenzisa ukomelela okuphezulu komgangatho ophezulu kunokwandisa uyilo lolwakhiwo, ukuphucula izinga lokusetyenziswa kwendawo kunye nokukhawulezisa isantya sokwakha, kodwa ukucutheka kunye nokonakala kwekonkrithi yokusebenza okuphezulu kukunqanda usetyenziso nophuhliso lwayo. Ukuphakama kwamandla ekhonkrithi, i-tension/compression ratio yeconcrete isezantsi; ngakumbi ikhonkrithi enqabileyo, kwaye ithanda ukuqhekeka ngakumbi. Ngoko ke, Iimfuno eziphezulu zibekwe phambili zokuphucula ukuxhathisa kokuqhekeka kunye nokugoba kokuqina kwekhonkrithi. Ifayibha ye-PVA yeyona nto iphambili ekuqondeni ubunjineli bezinto ezisekwe kwisamente (ECC). Nangona kunjalo, kusekho ukunqongophala kophando olucwangcisiweyo kuphando lovavanyo kunye nokusetyenziswa kobunjineli bokongeza ifayibha ye-PVA enamandla aphezulu kunye nemodyuli enwebekayo ukuphucula ukuxhathisa kokuqhekeka kunye nokugoba ukuqina kwekhonkrithi..

Ziziphi iimpawu kunye neempawu ze-PVA fiber?

I-concrete fiber additive isetyenziselwa ukuxhathisa ukuqhekeka kwekhonkrithi, eqhele ukusetyenziswa kwidayamitha elinganayo ye 5 ~ 20 iimicrons, amandla obunzima malunga 1 100 MPa. Imodyuli elastiki ingaphantsi kune 35 I-GPa yamandla aphakathi kunye nemodyuli yefiber yePVA enqunqiweyo, enokusebenzisa amandla aphezulu kunye nemodyuli ephezulu enwebekayo yefiber enqunqiweyo yePVA. Ifayibha ye-PVA enamandla amakhulu kunye nemodyuli elastiki inamandla afanayo aphezulu okuxinana njengentsimbi yentsimbi, kwaye imodyuli elastiki inkulu kuno okanye iyalingana 35 GPA, ekufutshane nemodyuli elastiki yekhonkrithi, kwaye inokuphucula ngokubonakalayo ukuqina okanye ukuqina kwekhonkrithi.

I-PVA fiber isasazwa ngokulinganayo kwikhonkrithi, kwaye isasazwe kwizalathiso ezingaqhelekanga kwaye zigqitywe kwisakhiwo sothungelwano esine-dimensional ezintathu. Idlala indima ekuphuculeni ukumelana nokuqhekeka kunye nokuqina kwikhonkrithi, ukuze kuphuculwe umgangatho uwonke kunye nokuqina kwekhonkrithi. Emva kokongeza i-PVA fiber kwikhonkrithi, ayiyi kuba ne-chemical reaction kunye nayo nayiphi na into ekhonkrithi, kwaye iimpawu zayo zomzimba nezekhemikhali zizinzile. Indima yefayibha ye-PVA ekuxhathiseni ukuqhekeka kunye nokuqina kwikhonkrithi yinto yomzimba kuphela, kwaye yinto entsha enokuphucula ukumelana nokuqhekeka kunye nokuqina kwekhonkrithi.

Iqondo lokusasazwa okufanayo kwePVA yekhonkrithi yefiber yinto ebalulekileyo yokukhupha i-anti-crack kunye nefuthe eliqina kwikhonkrithi.. Kwikhonkrithi enomxholo ophezulu we-PVA fiber, Ukusasazwa okufanayo kwefayibha ye-PVA kunempembelelo ebaluleke ngakumbi kuxhathiso lokuqhekeka kunye nefuthe eliqinileyo lekhonkrithi. Ukusika ifayibha ye-PVA enamandla amakhulu kunye ne-elastic modulus yamkelwa kwizifundo ezifanelekileyo. Xa umthamo wefiber umthamo wonyuswa ukuya 2%, Ukusasazwa okufanayo kwefayibha kusenokuqinisekiswa, kunye nokumelana nokuqhekeka kunye nokuqina kwekhonkrithi kunokuphuculwa kakhulu. Kodwa ngomxholo ophezulu wamandla aphakathi kunye ne-elastic modulus ye-superfine short cut ye-PVA fiber concrete, xa isetyenziswa, ithande ukuhlangana kwifiber kwikhonkrithi okanye ihlakazeke ngokungalinganiyo, Isidingo ngokulungiswa kwekhonkrithi entsha kunye ne-viscosity yeplastiki kunye nokuphucula i-PVA fiber surface hydrophilicity kunye namanye amanyathelo okuphucula ukufana kokusasazwa kwe-ultrafine PVA fiber kwiimpawu zekhonkrithi., ukuqinisekisa indima yayo ekuchaseni ukuqhekeka kwekhonkrithi.

I-Cie-China.org ngumboneleli okhokelayo wezongezo zekhonkrithi zogwebu obonelela ngearhente yogwebu, superplasticizer,isixhasi samandla ekhonkrithi enogwebu kwikhonkrithi ekhaphukhaphu, Iibhloko ze-CLC. Ukuba ujonge i-PVA fiber, nceda uzive ukhululekile Qhagamshelana nathi.