Tsiku Lotumiza:2, Jan,2024
Kugwiritsa ntchito konkriti admixtures kwambiri bwino otaya katundu wa konkire amachepetsa kuchuluka kwa cementitious zipangizo konkire. Chifukwa chake, zosakaniza za konkriti zimagwiritsidwa ntchito kwambiri. Muzochita zopanga nthawi yayitali, zapezeka kuti malo ambiri osakanikirana amakhala ndi kusamvetsetsana pakugwiritsa ntchito ma admixtures, zomwe zimapangitsa kuti pakhale mphamvu yokwanira ya konkriti, kusagwira bwino ntchito, kapena mtengo wosakanikirana wa konkire.
Kudziwa kugwiritsa ntchito zosakaniza zolondola kumatha kuwonjezera mphamvu ya konkire ndikusunga mtengo wosakanikirana wosasinthika; kapena kuchepetsa kusakaniza mtengo pamene kusunga mphamvu konkire; sungani chiŵerengero cha madzi-simenti osasinthika, sinthani ntchito ya konkire.
A.Kusamvana wamba pa ntchito admixtures
(1) Gulani zosakaniza pamitengo yotsika
Chifukwa cha mpikisano woopsa wa msika, malo osakaniza ali ndi ulamuliro wokhwima pa kugula kwa zipangizo. Malo osakaniza onse akuyembekeza kugula zopangira pamtengo wotsika kwambiri, zomwezo zimapitanso ndi zosakaniza za konkire. Zosakaniza zosakaniza zimatsitsa mtengo wogula wa admixtures, zomwe zidzapangitsa kuti opanga admixture achepetse milingo yawo. Nthawi zambiri, njira zovomerezera zophatikizira sizimatchulidwa kawirikawiri m'mapangano ogula zinthu zosakaniza. Ngakhale zitakhalapo, zimangogwirizana ndi zofunikira za dziko, ndipo zofunikira za dziko nthawi zambiri zimakhala zotsika kwambiri. Izi zimatsogolera ku mfundo yakuti pamene opanga admixture kupambana bid pa mtengo otsika, ndi admixtures amapereka ndi otsika khalidwe ndipo nthawi zambiri amakumana ndi zofunika dziko muyezo, kupangitsa kukhala kovuta kukwaniritsa ntchito zofunika za siteshoni kusanganikirana ntchito zosakaniza.
(2) Chepetsani kuchuluka kwa zowonjezera
Kupanga zisankho za siteshoni kusakaniza mosamalitsa kuyan'anila kusakaniza chiŵerengero mtengo, ndipo ngakhale ndi zofunika zomveka pa mlingo simenti ndi admixture mlingo. Izi zipangitsa kuti dipatimenti yaukadaulo isayerekeze kuphwanya zisankho's pazipita mlingo zofunika kwa zina pamene akupanga kusakaniza chiŵerengero.
(3) Kupanda kuyang'anira khalidwe ndi kutsimikizira kukonzekera mayesero admixtures
Pakalipano, poyang'anitsitsa zosungirako zosakaniza, malo ambiri osakaniza amayendetsa chizindikiro chimodzi kapena ziwiri zaumisiri monga okhutira, kuchepetsa madzi, kachulukidwe, ndi fluidity ya slurry yoyera. Malo ochepa osakaniza amayesa mayeso a konkire.
Muzochita kupanga, tinapeza kuti ngakhale okhutira olimba, mlingo kuchepetsa madzi, kachulukidwe, fluidity ndi zizindikiro zina luso admixture kukwaniritsa zofunika, mayeso konkire mwina si kukwaniritsa zotsatira za kusakaniza choyambirira mayesero, ndiko kuti, mlingo wa konkire kuchepetsa madzi ndi wosakwanira. , kapena kusakhoza kusinthasintha.
B. Zotsatira za kugwiritsa ntchito molakwika zosakaniza pamtundu wa konkire ndi mtengo wake
Chifukwa otsika khalidwe mlingo wa admixtures ogulidwa pa mitengo otsika, kuti tikwaniritse zotsatira zokwanira kuchepetsa madzi, m'madipatimenti luso nthawi zambiri kuonjezera mlingo wa admixtures, chifukwa otsika khalidwe ndi Mipikisano cholinga admixtures. M'malo mwake, malo ena osakaniza okhala ndi kuwongolera kokhazikika komanso kuwongolera kwamitengo yosakanikirana kumagwiritsa ntchito zosakaniza zamtundu wabwinoko komanso mitengo yapamwamba. Chifukwa chapamwamba komanso chocheperako chogwiritsidwa ntchito, mtengo wamagulu ophatikizira umachepa.
Malo ena osakaniza amachepetsa kuchuluka kwa zosakaniza. Pamene kugwa kwa konkire sikuli kokwanira, dipatimenti yaumisiri idzachepetsa chinyezi cha mchenga ndi miyala, kapena kuwonjezera madzi akumwa pa unit ya konkire, zomwe zidzatsogolera kutsika kwa mphamvu ya konkire. Madipatimenti aukadaulo omwe ali ndi malingaliro amphamvu amawonjezera mosadukiza kapena mwachindunji kuchuluka kwa madzi omwe amamwa konkire komanso nthawi yomweyo kuonjezera kuchuluka kwa zinthu za simenti (kusunga chiŵerengero cha simenti chamadzi chosasinthika), zomwe zimabweretsa kuwonjezeka kwa mtengo wa simenti. konkriti mix ratio.
Malo osanganikirana alibe kuwunika kwabwino komanso kutsimikizika kokonzekera zoyeserera za admixtures. Pamene ubwino wa zowonjezera umasinthasintha (kuchepa), dipatimenti yaukadaulo imagwiritsabe ntchito chiŵerengero choyambirira chosakaniza. Pofuna kukwaniritsa zofunikira zowonongeka, madzi enieni a konkire amawonjezeka, kuchuluka kwa simenti ya madzi kumawonjezeka, ndipo mphamvu ya konkire imachepa.
Nthawi yotumiza: Jan-02-2024
