1, muenzaniso
Simende yakawanda inofanira kutorwa kubva kune inotakura simende isati yaiswa mudhiramu silo. Pamasaga simende, sampler inofanira kushandiswa kusampula isingasviki masaga gumi esimende. Paunenge uchitora sampling, simende inofanirwa kuongororwa nekuona kuti hunyoro hunowedzera. Pamasaga esimende, masaga gumi anofanirwa kusarudzwa zvisina tsarukano kuyera uye kuverenga huremu hweavhareji pakusvika kwega kwega.
2. Mamiriro ekuedzwa
Tembiricha yemurabhoritari i20 ± 2 ℃, hunyoro hwehukama hahufanire kunge huri pasi pe50%; Tembiricha yesamende samende, kusanganisa mvura, zviridzwa uye midziyo inofanira kuenderana neyerabhoritari;
Tembiricha yebhokisi rekurapa mwando ndeye 20 ± 1 ℃, uye hunyoro husingasviki 90%.
3. Kutsunga kwekushandiswa kwemvura kune yakajairwa kuenderana GB/T1346-2001
3.1 Zviridzwa nemidziyo: simende paste musanganiswa, vica chiridzwa
3.2 Nyoresa chiridzwa uye midziyo nemucheka wakanyorova, uremu 500g yesimende, uidururire mumvura mukati me5 ~ 10s, tanga musanganisi, wakaderera kukurumidza kusanganisa 120s, mira kwe15s, uye ipapo high speed kusanganisa 120s mira.
3.3 Matanho ekuyera:
Mushure mekusanganisa, pakarepo sanganisa yakanaka simende net slurry muyedzo mold yakaiswa pagirazi rezasi ndiro, isa uye pondo nebanga, zvinyoro nyoro zunza kakawanda, bvisa yakawandisa mambure slurry; Mushure mekuenzanisa, iyo test mold uye pasi ndiro inotamirwa kune veka chiridzwa, uye pakati payo inogadziriswa pasi petest bar, uye test bar inodzikiswa kusvika yasangana nepamusoro pesement net slurry. Mushure mekusimbisa screws ye 1s ~ 2s, inongoerekana yazorora, kuitira kuti test bar inonyura vertically uye yakasununguka mune simende net slurry. Rekodha chinhambwe pakati peyeyedzo nendiro yepasi apo bvunzo revheti inomira kunyura kana kuburitsa bvunzo yemasekondi makumi matatu. Basa rose rinofanira kupedzwa mukati memaminitsi 1.5. Iyo yakajairwa kuenderana kwesimende slurry ndeye simende slurry iyo yakanyura muyedzo tsvimbo uye 6±1mm kure nendiro yepasi. Huwandu hwemvura hunoshandiswa pakusanganisa ndiyo chiyero chinoenderana nesamende (P), inoverengerwa sechikamu chechikamu chesamende.
4. Kutsunga kwekugadzirisa nguva GB/T1346-2001
Kugadzirira kwemuenzaniso: iyo yakajairwa kuenderana net slurry yakagadzirwa nemvura ine yakajairwa kuenderana yakazadzwa neyeyedzo mold panguva imwe, yakakweshwa mushure menguva dzinoverengeka yekuzunguzika, uye nekukasira kuiswa mubhokisi rekurapa mwando. Rekodha nguva iyo simende inowedzerwa kumvura senguva yekutanga yekuisa nguva.
Kutsunga kwekutanga kuseta nguva: zvienzaniso zvakaporeswa mubhokisi rekuporesa unyoro kusvika 30min mushure mekuwedzera mvura kekutanga. Kana tsono yebvunzo ichinyura pasi 4±1mm, simiti inosvika padanho rekutanga; Nguva kubva pakuwedzera simenti mumvura kusvika pakugadzika kwekutanga ndiyo nguva yekutanga yekuisa simenti, inoratidzirwa mu "min".
Kutsunga kwekupedzisira kwekugadzirisa nguva: mushure mekugadzirisa kwekutanga kwekugadzirisa nguva, pakarepo bvisa sampuli ne slurry kubva pagirazi regirazi nekushandura, uye shandura iyo 180 °. Dhayamita yekuguma kukuru, kupera kudiki pandiro yegirazi, wedzera hunyoro hwekurapa bhokisi pakugadzirisa, padhuze yekupedzisira yekumisikidza nguva yekumisikidza kamwe chete gumi nemashanu maminetsi, apo kuyedza tsono mumuviri we0.5 mm, kureva mhete yekunamatira kwakatanga kusasiya chiratidzo. edza muviri, svika padanho rekupedzisira resimende, iyo simende inowedzera mvura kusvika iyo yenguva yekupedzisira yakatarwa yenguva yekupedzisira yekuisa simende, Iko kukosha ndeye min.
Kuchenjerera kunofanira kubhadharwa pakutsunga, mukutanga kutsunga kwekushanda kunofanira zvinyoronyoro kutsigira mbiru yesimbi, kuitira kuti zvishoma nezvishoma pasi, kudzivirira muedzo wetsono kudhumhana vachikotama, asi mugumisiro wakasununguka kuwa uchakunda; Munguva yese yekuyedzwa, nzvimbo yekunyura kwetsono inofanira kunge iri 10mm kure nemadziro emukati me mold. Kana iyo yekutanga yave pedyo, inofanira kuyerwa yega yega 5min, uye kana nguva yekupedzisira yekumisa yava pedyo, inofanira kuyerwa yega 15min. Kana gadziriro yekutanga kana kuti yekupedzisira yasvikwa, inofanira kuyerwa zvakare nekukasika. Kana mhedziso mbiri dzakafanana, zvinogona kutariswa sekusvika padanho rekutanga kana mamiriro ekupedzisira ekugadzirisa. Muedzo wega wega haugone kurega tsono ichiwira mupini yepakutanga, iyo yese yekuyedza maitiro kudzivirira kuzunguzika kwe mold.
5. Kutsunga kwekugadzikana GB/T1346-2001
Kuumbwa kwemuenzaniso: isa clip yeReisler yakagadzirirwa pandiro yegirazi yekuzora zvishoma, uye wobva wazadza iyo yakagadziriswa yakajairwa kuenderana kwakachena slurry neReisler kamwe, isa uye kuipwanya kakawanda nebanga rinenge 10mm yakafara, wozoipukuta, vhara zvishoma. ndiro yegirazi yekuzora, uye nekukasira fambisa sampuli kune iyo mwando yekurapa bhokisi re24±2h.
Bvisa ndiro yegirazi uye bvisa muenzaniso. Chekutanga kuyera chinhambwe chiri pakati peanongedza matipi eReefer's clamp (A), yakarurama kusvika 0.5mm. Isa zvienzaniso zviviri izvi paA test rack mumvura iri kufashaira ine pointer yakatarisa kumusoro, wobva wadziisa kusvika pakuvira mu30±5min woramba uchifashaira kwe180±5min.
Mhedzisiro yerusarura: Mushure mekufashaira, regai mvura iri mubhokisi, mushure mekunge bhokisi ratonhodzwa kusvika mutembiricha yekamuri, bvisa sampuli yekuyera, chinhambwe chepointer tip (C), chakarurama kusvika 0.5mm. Kana chiyero chepakati chekuwedzera kureba (CA) pakati pezvienzaniso zviviri hazvisi kupfuura 5.0mm, inofungidzirwa kuti kugadzikana kwesimende kunokodzera. Kana mutsauko wekukosha kwe (CA) pakati pezvienzaniso zviviri zvinopfuura 4.0mm, sampuli imwe chete ichadzokororwa pakarepo. Muchiitiko ichi, kugadzikana kwesimende kunofungidzirwa kusina kukodzera.
6, simende dhaka simba bvunzo nzira GB/T17671-1999
6.1 musanganiswa ratio
Kusanganiswa kwemhando yedhaka kunofanira kuva chikamu chimwe chesimende, zvikamu zvitatu zvejecha rejecha uye hafu yemvura (mvura simende chiyero 0.5). Concrete simende 450g, 1350g standard jecha, mvura 225 g. Kururama kwechiyero kunofanira kuva ± 1g.
6.2 kumutsa
Poto imwe neimwe yejecha reglue inomutswa nemagetsi ne blender. Isa musanganisi mumamiriro ekushanda kutanga, wozotevera nzira inotevera: wedzera mvura muhari, wobva wawedzera simenti, isa poto pamubati, simuka panzvimbo yakagadziriswa. Wobva watanga muchina, wakaderera kumhanya kusanganisa makumi matatu, wechipiri makumi matatu akatanga panguva imwe chete kuti awedzere jecha, shandura muchina kune kumhanya kukuru kusanganisa 30s, rega kusanganisa makumi mapfumbamwe, uyezve kumhanya kukuru kusanganisa makumi matanhatu, iyo yakazara makumi maviri nemakumi mana.
6.3 Kugadziriswa kwezvienzaniso
Saizi yemuenzaniso inofanira kunge iri 40mm×40mm×160mm prism.
Kuumba ine vibrating table
Pakarepo mushure mekugadzirira kwekuumbwa kwedhaka, nechipunu chakakodzera chakananga kubva muhari inobvongodza ichakamurwa kuita zvidimbu zviviri zvedhaka muvhu rekuyedza, yekutanga layer, tangi imwe neimwe inenge 300g dhaka, ine hombe yekudyisa yakatwasuka furemu pamusoro pe. iyo mold chivharo nechepamusoro peyeyedzo mold padivi pegarovha imwe neimwe kumashure neshure kana iyo layer yaiswa mhodzi yakati sandara, yobva yavibration ka60. Wobva waremedza chikamu chechipiri chedhaka, dyara furati nediki, uye zunza ka60. Iine mutongi wesimbi kusvika panosvika 90 ° Angle furemu kumusoro kweyedzo mold, uyezve pamwe nekureba kwegwaro reyedzo mold ine transverse sawing chiito zvishoma nezvishoma kusvika kune imwe mugumo wekufamba, inopfuura iyo bvunzo mold chikamu che jecha kukwenya, uye nemutongi mumwechete kupotsa kuenzana pamusoro pemuviri webvunzo.
6.4 Kugadziriswa kwezvienzaniso
Iyo yakanyorwa bvunzo mold ichaiswa mu simende yakajairwa kurapa bhokisi, inogadzirwa pakati pe20-24h. Iyo yakanyorwa yemuenzaniso inoiswa pakarepo yakachinjika kana yakatwasuka mumvura pa20 ℃ ± 1 ℃ yekugadzirisa, uye ndege yekukwenya inofanira kunge iri kumusoro kana yaiswa yakachinjika.
6.5 Kuedzwa kwesimba uye kuongorora
Bending simba bvunzo:
The flexural simba akayerwa nepakati kurodha nzira ine flexural simba rekuyedza muchina. Iyo yekumanikidza bvunzo yakaitwa pane yakatyoka prism nekuiisa pane inomanikidza simba tester. Iyo yekumanikidza yepamusoro yaive mativi maviri emuviri wekuyedza payakaumbwa, ine nzvimbo ye40mm × 40mm. (Kuverenga kwakanyorwa ku0.1mpa)
Iko kushanduka simba ndiko kuverenga kwakananga pamushini wekuyedza, unit (MPa)
Compressive simba Rc (chaiyo kusvika 0.1mpa) Rc = FC/A
Maximum mutoro pakukundikana kweFc—-,
A—- Kudzvanya nzvimbo, mm2 (40mm×40mm=1600mm2)
Flexural simba ongororo:
Avhareji kukosha kwekupikiswa kwekushanduka kweboka remaprism matatu inotorwa semhedzisiro yekuyedza. Kana iwo matatu masimba esimba achipfuura avhareji kukosha kwe ± 10%, kukosha kweavhareji kunofanirwa kubviswa semhedzisiro yekuedza simba rekuchinja.
Compressive simba evaluation: iyo arithmetical evaluation kukosha kwematanhatu ekumanikidza esimba anowanikwa pane seti yemaprism matatu ndiwo mhedzisiro yebvunzo. Kana imwe yezvikamu zvitanhatu zvakayerwa ichipfuura ± 10% yezvitanhatu zvinoreva kukosha, mhedzisiro inofanira kubviswa uye mashanu asara anoreva kukosha kutorwa. Kana mamwe emhando shanu dzakayerwa dzichipfuura zvadzinoreva ± 10%, iyo seti yemhedzisiro ichave isingashande.
7, kunaka bvunzo nzira (80μm sieve yekuongorora nzira) GB1345-2005
7.1 Chimbo: 80μm bvunzo sikirini, isina kunaka kudzvanywa skrini yekuongorora chiridzwa, chiyero (iyo yekukamura kukosha haina kupfuura 0.05g)
7.2 Muedzo wekuedza: kuyera 25g simenti, uise mukati mehuipi husina kunaka, kuvhara chifukidzo chechivharo, chiise pachigadziko chesero, gadzirisa kudzvinyirira kusina kunaka kune huwandu hwe4000 ~ 6000Pa. Paunenge uchiongorora kuongorora, kana paine yakanamirwa kune chivharo chivharo, unogona kugogodza zvinyoro nyoro, kuitira kuti sampuli iwire, mushure mekutarisa, shandisa chiyero kuyera yasara yechidzitiro.
7.3 Chiverengo chemhedzisiro Iyo yasara muzana yesamu yesamu yesamende inoverengerwa sezvizvi:
F ndeye RS/W ka100
Ikoko: F - sieve residual percentage yesamende samende, %;
RS - Misa yesamende yekrini yakasara, G;
W - huwandu hwesamende yesamende, G.
Mhedzisiro inoverengerwa ku0.1%.
Sample yega yega ichayerwa uye masampula maviri achaongororwa akaparadzana, uye avhareji kukosha kwemasamples asara achatorwa semhedzisiro yekuongorora. Kana kukanganisa kwese kweiyo miviri yekuongorora kwakakura kupfuura 0.5% (kana iyo yekuongorora yakasara kukosha yakakura kupfuura 5.0%, inogona kuiswa ku1.0%), imwe bvunzo inofanirwa kuitwa, uye iyo arithmetic chirevo chezvirevo zviviri zvakafanana. inofanira kutorwa semugumisiro wekupedzisira.
8, kuchena kwesamende chena
Paunenge uchitora sampling, kuchena kwesimende uye ruvara zvinofanirwa kuyerwa nekuenzaniswa nekuchena kwemuenzaniso.
Nguva yekutumira: Zvita-06-2021