1, isampula
Usimende oyinqwaba kufanele uthathwe endaweni yokuthwala usimende ngaphambi kokuthi ufakwe esiseleni semiphongolo.Kusimende ofakwe esikhwameni, isampula kufanele isetshenziselwe ukusampula izikhwama zikasimende ezingekho ngaphansi kuka-10.Lapho kwenziwa isampula, usimende kufanele uhlolwe ngokubonakalayo ukuze kuhlanganiswe umswakama.Ezikhwameni zikasimende, izikhwama eziyi-10 kufanele zikhethwe ngokungahleliwe ukuze kukalwe futhi kubalwe isisindo esimaphakathi ekufikeni ngakunye.
2. Izimo zokuhlola
Izinga lokushisa laselabhorethri lingu-20±2℃, umswakama ohlobene akufanele ube ngaphansi kuka-50%;Izinga lokushisa lamasampula usimende, amanzi okuxutshwa, izinsimbi nezinto ezisetshenziswayo kufanele kuhambisane nelabhorethri;
Izinga lokushisa lebhokisi lokuphulukisa umswakama lingu-20±1℃, kanti umswakama ohlobene awukho ngaphansi kuka-90%.
3. Ukunqunywa kokusetshenziswa kwamanzi kokungaguquguquki okujwayelekile kwe-GB/T1346-2001
3.1 Izinsimbi kanye nemishini: ingxube kasimende yokunamathisela, ithuluzi le-vica
3.2 Manisa insimbi nezinto zokusebenza ngendwangu emanzi, kala u-500g kasimende, uthele emanzini phakathi kwama-5 ~ 10s, qala isixhumi, uhlanganise isivinini esiphansi 120s, ume iminyaka engu-15, bese uhlanganisa isivinini esiphezulu se-120s ume.
3.3 Izinyathelo zokulinganisa:
Ngemuva kokuxuba, hlanganisa ngokushesha i-slurry enhle ye-cement net esikhunjini sokuhlola ibekwe epuleti eliphansi lengilazi, faka bese ushaya ngommese, dlidliza ngobumnene izikhathi eziningana, sula i-slurry enetha ngokweqile;Ngemva kokulinganisa, isikhunta sokuhlola kanye nepuleti eliphansi kuhanjiswa ethuluzini le-veka, futhi isikhungo salo silungiswa ngaphansi kwebha yokuhlola, futhi ibha yokuhlola iyehliswa kuze kube yilapho ithinta ubuso be-slurry yenethi yesimende.Ngemva kokuqinisa izikulufu ze-1s ~ 2s, ikhululeka ngokuzumayo, ukuze ibha yokuhlola izike iqonde futhi ngokukhululekile ku-slurry yenetha likasimende.Rekhoda ibanga phakathi kwe-lever yokuhlola kanye nepuleti eliphansi lapho i-lever yokuhlola iyeka ukucwila noma ikhulula i-lever yokuhlola imizuzwana engu-30.Wonke umsebenzi kufanele uqedwe phakathi nemizuzu engu-1.5.Ukungaguquguquki okujwayelekile kodaka lukasimende udaka lukasimende olucwiliswa ku-test rod kanye no-6±1mm kude nepuleti elingaphansi.Inani lamanzi asetshenziselwa ukuxuba ukuhambisana okujwayelekile kukasimende (P), kubalwa njengephesenti lesisindo sikasimende.
4. Ukunqunywa kokubeka isikhathi GB/T1346-2001
Ukulungiswa kwesampula: udaka olujwayelekile lwenethi lokungaguquguquki olwenziwe ngamanzi anokulingana okujwayelekile lugcwaliswe ngesikhunta sokuhlola ngesikhathi esisodwa, lwalwe ngemva kokudlidliza izikhathi ezimbalwa, futhi ngokushesha lufakwa ebhokisini lokuphulukisa umswakama.Rekhoda isikhathi lapho usimende wengezwa khona emanzini njengesikhathi sokuqala sokusetha isikhathi.
Ukunqunywa kwesikhathi sokuqala sokusetha: ama-specimens alashwa ebhokisini lokuphulukisa umswakama kuze kube yimizuzu engama-30 ngemva kokwengeza amanzi okokuqala ngqa.Lapho inaliti yokuhlola ishona phansi 4±1mm, usimende ufinyelela esimweni sokuqala sokubeka;Isikhathi kusukela ekungezeni usimende emanzini kuya ekufinyeleleni esimweni sokuqala sokusetha yisikhathi sokuqala sokusetha sikasimende, esivezwa ngo-“min”.
Ukunqunywa kwesikhathi sokugcina sokusetha: ngemva kokunqunywa kwesikhathi sokuqala sokusetha, susa ngokushesha isampula nge-slurry epuleti lengilazi ngokuhumusha, bese uyiphendulela ku-180 °.Ububanzi besiphetho esikhulu, isiphetho esincane epuleti lengilazi, engeza ibhokisi lokuphulukisa umswakama ekunakekeleni, eduze nokunquma isikhathi sokusetha sokugcina kanye njalo emizuzwini eyi-15, lapho izinaliti zokuzama emzimbeni ongu-0.5 mm, okungukuthi indandatho enamathiselwe iqala ukungakwazi ukushiya uphawu zama umzimba, finyelela isimo sokugcina sesethi sikasimende, usimende ungeze amanzi kuze kube yisimo sesikhathi sokugcina sokusetha isikhathi sokugcina sikasimende, Inani liyimin.
Ukunakwa kufanele kukhokhwe ekunqumeni, ekunqumeni kokuqala kokusebenza kufanele ukusekela ngobumnene ikholomu yensimbi, ukuze kancane kancane, ukuvimbela ukugoba kokushayisana kwenaliti yokuhlola, kodwa umphumela uba ukuwa kwamahhala kuyakuba khona;Phakathi nayo yonke inqubo yokuhlola, indawo yokucwila inaliti kufanele ibe okungenani i-10mm kude nodonga lwangaphakathi lwesikhunta.Uma isilungiselelo sokuqala siseduze, kufanele sikalwe njalo ngemizuzu engu-5, futhi uma isikhathi sokusetha sokugcina siseduze, kufanele silinganiswe njalo ngemizuzu engu-15.Uma isilungiselelo sokuqala noma isilungiselelo sokugcina sifinyelelwa, kufanele silinganiswe futhi ngokushesha.Uma iziphetho ezimbili zifana, kunganqunywa njengokufinyelela isilungiselelo sokuqala noma isimo sokugcina sokusetha.Ukuhlolwa ngakunye akukwazi ukuvumela inaliti iwele embotsheni yokuqala, yonke inqubo yokuhlola ukuvimbela ukudlidliza kwesikhunta.
5. Ukunqunywa kokuzinza kwe-GB/T1346-2001
Ukubumba isifanekiso: faka isiqeshana se-Reisler esilungisiwe epuletini yengilazi egcotshwa kancane, bese ugcwalisa ngokushesha i-slurry ehlanzekile evamile elungiselelwe nge-Reisler kanye, uyifake futhi uyigxobe izikhathi eziningana ngommese ongaba ngu-10mm ububanzi, bese usula phansi, umboze kancane. ipuleti lengilazi eligcoba amafutha, futhi ngokushesha uhambise isifanekiso ebhokisini lokuphulukisa umswakama isikhathi esingu-24±2h.
Susa ipuleti lengilazi bese ususa isifanekiso.Qala ngokukala ibanga eliphakathi kwamathiphu esikhombi se-Reefer's clamp (A), elinembile libe ngu-0.5mm.Beka ama-specimens amabili ku-A test rack emanzini abilayo isikhombi sibheke phezulu, bese uwashisisa ukuze abile ku-30±5min bese uqhubeka ubila u-180±5min.
Umphumela wokubandlululwa: Ngemva kokubilisa, vumela amanzi asebhokisini, ngemva kokuba ibhokisi selipholile izinga lokushisa elilingana negumbi, khipha isifanekiso sokulinganisa, ibanga lethiphu yesikhombi (C), elinembile libe ngu-0.5mm.Uma isilinganiso senani lebanga elikhulisiwe (CA) phakathi kwezibonelo ezimbili lingekho ngaphezu kuka-5.0mm, kubhekwa ukuthi ukuzinza kukasimende kufanelekile.Uma umehluko wenani le-(CA) phakathi kwezibonelo ezimbili ungaphezu kuka-4.0mm, isampula efanayo izophinda ihlolwe ngokushesha.Kulokhu, ukuzinza kukasimende kubhekwa njengokungafaneleki.
6, indlela yokuhlola amandla odaka lukasimende GB/T17671-1999
6.1 isilinganiso sengxube
Ingxube yekhwalithi yodaka kufanele ibe ingxenye eyodwa usimende, izingxenye ezintathu zesihlabathi esijwayelekile kanye nengxenye yamanzi ingxenye (isilinganiso sikasimende wamanzi 0.5).Ukhonkolo usimende 450g, 1350g isihlabathi esijwayelekile, amanzi 225 g.Ukunemba kwebhalansi kufanele kube ±1g.
6.2 gudluza
Ibhodwe ngalinye lesihlabathi seglue lishukunyiswa ngomshini nge-blender.Faka i-mixer esimweni sokusebenza kuqala, bese ulandela inqubo elandelayo: engeza amanzi ebhodweni, bese ufaka usimende, ubeke ibhodwe kusibambi, ukhuphukele endaweni ehleliwe.Bese uqala umshini, isivinini esiphansi sokuxuba ama-30s, i-30 yesibili yaqala ngesikhathi esifanayo ukufaka isihlabathi ngokulinganayo, vula umshini ekuhlanganiseni isivinini esiphezulu se-30s, yeka ukuxuba ama-90s, bese uhlanganisa isivinini esiphezulu se-60s, ingqikithi yama-240s.
6.3 Ukulungiswa kwezibonelo
Usayizi wesampula kufanele ube ngu-40mmx40mm×160mm prism.
Ukwakheka ngetafula elidlidlizayo
Ngokushesha ngemva kokulungiswa kokubunjwa kodaka, ngesipuni esifanelekile ngokuqondile ebhodweni elinyakazayo lizohlukaniswa zibe izingqimba ezimbili zodaka zibe isikhunta sokuhlola, ungqimba lokuqala, ithangi ngalinye mayelana nodaka lwama-300g, nohlaka olukhulu lokuphakelayo oluma phezulu phezulu. isembozo sesikhunta ngaphezulu kwesikhunta sokuhlola eduze nomsele ngamunye emuva naphambili uma ungqimba lwempahla selunembewu luyisicaba, bese ludlidliza izikhathi ezingama-60.Bese ulayisha ungqimba lwesibili lodaka, hlwanyela phansi nge-feeder encane, bese udlidliza izikhathi ezingu-60.Ngerula lensimbi elifinyelela cishe kuhlaka lwe-engeli engu-90° phezulu kwesikhunta sokuhlola, bese ngaseceleni kobude besikhunta sokuhlola esinesenzo sokusaha esiphambene kancane siye komunye umkhawulo wokunyakaza, okungaphezu kwengxenye yesikhunta sokuhlola ukukhuhla kwesihlabathi, kanye nerula efanayo ukuze ucishe ingaphezulu lomzimba wokuhlola.
6.4 Ukwelashwa kwezibonelo
Isikhunta esimakiwe sokuhlola sizofakwa ebhokisini elijwayelekile likasimende lokuphulukisa, lenziwe phakathi kwamahora angu-20-24.Isifanekiso esimakiwe sibekwa ngokushesha sivundlile noma sime mpo emanzini ku-20℃±1℃ ukuze silungiswe, futhi indiza ekhuhlayo kufanele ibe phezulu uma ibekwe ivundlile.
6.5 Ukuhlolwa nokuhlola amandla
Ukuhlolwa kwamandla okugoba:
Amandla e-flexural akalwa ngendlela yokulayisha emaphakathi ngomshini wokuhlola amandla aguquguqukayo.Ukuhlolwa kokucindezela kwenziwa ku-prism ephukile ngokuyibeka kusihloli samandla esicindezelayo.Indawo ecindezelayo yayiyizinhlangothi ezimbili zomzimba wokuhlola lapho ibunjwa, inendawo engu-40mm×40mm.(Ukufunda kuqoshwe ku-0.1mpa)
Amandla e-flexural ukufunda okuqondile emshinini wokuhlola, iyunithi (MPa)
Amandla acindezelayo Rc (anembile kuye ku-0.1mpa) Rc = FC/A
Umthwalo omkhulu ekuhlulekeni kwe-Fc—-,
A—- Indawo yokucindezelwa, mm2 (40mm×40mm=1600mm2)
Ukuhlola amandla e-Flexural:
Inani elimaphakathi lokumelana nokuguquguquka kweqembu lama-prism amathathu lithathwa njengomphumela wokuhlola.Uma amanani amathathu wamandla edlula inani eliyisilinganiso elingu-±10%, inani elimaphakathi kufanele lisuswe njengomphumela wokuhlolwa wamandla aguquguqukayo.
Ukuhlolwa kwamandla acindezelayo: inani lokuhlola le-arithmetical lamanani ayisithupha wamandla acindezelayo atholwe kusethi yamaprism amathathu kuwumphumela wokuhlola.Uma inani elilodwa kwayisithupha elilinganisiwe lingaphezu kuka-±10% wamanani ayisithupha anencazelo, umphumela kufanele ususwe bese kuthathwe amanani asho amanani amahlanu asele.Uma amanani engeziwe kwahlanu akaliwe edlula isilinganiso sawo esingu-±10%, isethi yemiphumela ngeke isebenze.
7, indlela yokuhlola ubuhle (80μm indlela yokuhlaziya isisefo) GB1345-2005
7.1 Insimbi: 80μm isikrini sokuhlola, ithuluzi lokuhlaziya isikrini esinengcindezi, ibhalansi (inani elihlukanisayo alikho ngaphezu kuka-0.05g)
7.2 Inqubo yokuhlola: kala usimende ongu-25g, uyibeke esisefweni sokucindezela esingesihle, vala ikhava yesisefo, uyibeke esisekelweni se-sieve, lungisa ukucindezela okungekuhle kububanzi obungu-4000 ~ 6000Pa.Lapho uhlaziyo lokuhlola, uma kukhona okunamathiselwe kukhava yesikrini, ungangqongqoza ngobumnene, ukuze isampula iwe, ngemva kokuhlolwa, sebenzisa ibhalansi ukuze ukale ingxenye esele yesikrini.
7.3 Ukubalwa Kwemiphumela Iphesenti eliyinsalela yesisefo sesampula sikasimende libalwa ngale ndlela elandelayo:
F ithi RS/W izikhathi ezingu-100
Kuphi: F - iphesenti eliyinsalela yesihlungo sesampula sikasimende, %;
RS - Inqwaba yezinsalela zesikrini sikasimende, G;
W - isisindo sesampula sikasimende, G.
Umphumela ubalwa ku-0.1%.
Isampula ngayinye izokalwa futhi amasampuli amabili azohlolwa ngokuhlukana, futhi inani elimaphakathi lamasampula asele lizothathwa njengomphumela wokuhlaziya wokuhlola.Uma iphutha eliphelele lemiphumela yokuhlolwa emibili likhulu kuno-0.5% (uma inani lensalela yokuhlola likhulu kuno-5.0%, lingabekwa ku-1.0%), kufanele kwenziwe okunye ukuhlola, kanye nencazelo yezibalo yemiphumela emibili efanayo. kufanele kuthathwe njengomphumela wokugcina.
8, ubumhlophe bukasimende
Lapho kwenziwa amasampula, ubumhlophe bukasimende nombala kufanele kukalwe ngokubukeka futhi kuqhathaniswe nobumhlophe besampula.
Isikhathi sokuthumela: Dec-06-2021