Momwe Mungakulitsire Kugwira Ntchito Kwa Konkire?

Kupyolera mu kuyesera kuyerekeza, Kuwonjezera mapadi ether akhoza kwambiri kusintha workability wa konkire wamba ndi bwino pumpability wa pumpable konkire. Kuphatikizidwa kwa cellulose ether kudzachepetsa mphamvu ya konkire.

Mawu ofunikira: cellulose ether; ntchito konkriti; pompopompo

1.Mawu Oyamba

Ndi chitukuko chosalekeza cha anthu, kufunikira kwa konkire yamalonda kukuwonjezeka. Pambuyo pa zaka zoposa khumi za chitukuko chofulumira, konkire yamalonda yalowa mu siteji yokhwima. Konkire zosiyanasiyana zamalonda zimakwaniritsa zofunikira zama projekiti osiyanasiyana. Komabe, mu ntchito yeniyeni, tapeza kuti pogwiritsira ntchito konkire yopopera, nthawi zambiri chifukwa cha zifukwa monga kusagwira ntchito bwino kwa konkire ndi mchenga wosasunthika, galimoto yopopera idzatsekedwa, ndipo nthawi yochuluka ndi ogwira ntchito adzawonongeka pa malo omanga. ndi kusakaniza station, zomwe zingakhudze ntchitoyo. khalidwe la. Makamaka kwa konkire yotsika kwambiri, kugwirira ntchito kwake ndi kupopera kwake kumakhala koipitsitsa, kumakhala kosakhazikika, ndipo mwayi wa plugging ndi kuphulika kwa chitoliro ndipamwamba. Nthawi zambiri, kuchulukitsa mchenga ndikuwonjezera zinthu za simenti kumatha kusintha zomwe zili pamwambapa, komanso kumapangitsa kuti konkire ikhale yabwino. mtengo wazinthu. M'maphunziro apitalo, anapeza kuti Kuwonjezera mapadi etero kwa thovu konkire adzatulutsa ambiri chatsekedwa thovu laling'ono mpweya mu osakaniza, amene kumawonjezera fluidity wa konkire, bwino kugwa posungira, ndipo nthawi yomweyo masewero. ntchito posungira madzi ndi kuchedwa mumatope a simenti. Choncho, kuwonjezera pa cellulose ether ku konkire wamba kuyenera kukhala ndi zotsatira zofanana. Kenaka, kupyolera muzoyesera, pansi pa chiŵerengero cha kusakaniza kosalekeza, kagawo kakang'ono ka cellulose ether akuwonjezeredwa kuti ayang'ane ntchito ya osakaniza, kuyeza kachulukidwe konyowa, ndikuyesa mphamvu yopondereza ya konkire 28d. Zotsatirazi ndi ndondomeko ndi zotsatira za kuyesa.

2. Yesani

2.1 Yesani zopangira

(1) Simenti ndi mtundu wa Yufeng PO42.5 simenti.

(2) Zosakaniza zamchere zomwe zimagwiritsidwa ntchito ndi Laibin Power Plant Class II fly fly ash ndi Yufeng S75 class mineral powder.

(3) Kuphatikizika bwino ndi mchenga wopangidwa ndi makina a laimu opangidwa ndi Guangxi Yufeng Concrete Co., Ltd., wokhala ndi modulus ya fineness ya 2.9.

(4) Coarse aggregate ndi 5-25 mm mwala wopangidwa mosalekeza wopangidwa ndi Yufeng Blasting Company.

(5) Chotsitsa madzi ndi polycarboxylate yochepetsetsa kwambiri yamadzi AF-CB yopangidwa ndi Nanning Nengbo Company.

(6) Etha ya cellulose ndi HPMC yopangidwa ndi Kima Chemical Co., Ltd, yokhala ndi kukhuthala kwa 200,000.

2.2 Njira yoyesera ndi njira yoyesera

(1) Poganizira kuti chiŵerengero cha madzi-binder ndi chiŵerengero cha mchenga n'chofanana, yesetsani kuyesa molingana ndi kusakaniza kosiyana, kuyeza kugwa, kugwa kwa nthawi, ndi kufalikira kwa chisakanizo chatsopano, kuyeza kuchulukana kwakukulu kwa chitsanzo chilichonse, ndi sungani chiŵerengero chosakanikirana. Kugwira ntchito kwa zinthuzo ndikulemba mbiri.

(2) Pambuyo poyesa kutayika kwa ola la 1, chisakanizo cha chitsanzo chilichonse chinasakanizidwanso mofanana ndikuyikidwa m'magulu a 2 motsatira, ndikuchiritsidwa kwa masiku 7 ndi masiku 28 pansi pazikhalidwe.

(3) Gulu la 7d likafika msinkhu, chitani mayeso ophwanya kuti mupeze mgwirizano pakati pa mlingo ndi mphamvu ya 7d, ndikupeza mlingo wa mlingo x ndi ntchito yabwino komanso mphamvu zambiri.

(4) Gwiritsani ntchito mlingo wa x kuti muyese mayesero a konkire ndi malemba osiyanasiyana, ndikuyerekeza mphamvu za zitsanzo zopanda kanthu zomwe zimagwirizana. Dziwani kuchuluka kwa mphamvu ya konkire yamakalasi osiyanasiyana imakhudzidwa ndi cellulose ether.

2.3 Zotsatira za mayeso ndi kusanthula

(1) Pakuyesa, yang'anani momwe zinthu ziliri komanso momwe zimakhalira zosakanikirana zatsopano zokhala ndi milingo yosiyanasiyana, ndikujambula zithunzi. Kuonjezera apo, kufotokozera kwa boma ndi ntchito yachitsanzo chilichonse cha kusakaniza kwatsopano kumalembedwanso.

Kuphatikiza boma ndi ntchito ya osakaniza latsopano zitsanzo ndi Mlingo wosiyana ndi kufotokoza za boma ndi katundu wa osakaniza latsopano, angapezeke kuti akusowekapo gulu popanda mapadi efa ali workability ambiri, magazi ndi osauka encapsulation . Pamene cellulose ether anawonjezedwa, zitsanzo zonse zinalibe chodabwitsa magazi, ndi workability anali bwino kwambiri. Kupatula chitsanzo cha E, magulu atatuwo anali ndi madzi abwino, kukulitsa kwakukulu, ndipo anali osavuta kupopera ndi kumanga. Mlingo ukafika pafupifupi 1‰, osakaniza amakhala viscous, mlingo wa kukulitsa amachepetsa, ndipo fluidity ndi pafupifupi. Chifukwa chake, mlingo ndi 0.2‰～0.6‰, zomwe zimatha kusintha kwambiri magwiridwe antchito komanso pompopompo.

(2) Panthawi yoyesera, kuchuluka kwa chisakanizocho kunayesedwa, ndipo kunasweka patatha masiku 28, ndipo malamulo ena adapezedwa.

Zitha kuwoneka kuchokera ku chiyanjano pakati pa kuchulukitsitsa kwakukulu / mphamvu ndi kuchulukitsitsa kwakukulu / mphamvu ya kusakaniza kwatsopano ndi mlingo womwe kuchuluka kwa kusakaniza kwatsopano kumachepa pamene mlingo wa cellulose ether ukuwonjezeka. Mphamvu yopondereza idatsikanso ndi kuchuluka kwa cellulose ether. Zimagwirizana ndi konkriti ya thovu yophunziridwa ndi Yuan Wei.

(3) Kupyolera mu mayesero, amapezeka kuti mlingowo ukhoza kusankhidwa ngati 0.2‰, zomwe sizimangogwira ntchito bwino, komanso kukhala ndi mphamvu zochepa. Kenako, kupanga kuyesa C15, C25, C30, C35 4 magulu opanda kanthu ndi magulu 4 motsatana osakanikirana ndi 0,2‰cellulose ether.

Yang'anani momwe ntchito yosakaniza yatsopano ikugwirira ntchito ndikufanizira ndi chitsanzo chopanda kanthu. Kenaka yikani nkhungu kuti ichiritse, ndikuswa nkhungu kwa masiku 28 kuti mupeze mphamvu.

Panthawi yoyeserera, zidapezeka kuti kugwirira ntchito kwa zitsanzo zatsopano zosakaniza zosakanikirana ndi cellulose ether zakhala zikuyenda bwino, ndipo sipadzakhala tsankho kapena kutaya magazi konse. Komabe, zosakaniza zotsika kwambiri za C15, C20, ndi C25 mu zitsanzo zopanda kanthu ndizosavuta kuzilekanitsa ndi kukhetsa magazi chifukwa cha phulusa lochepa. Magiredi a C30 ndi kupitilira apo nawonso apita patsogolo. Itha kuwoneka kuchokera ku data poyerekeza mphamvu zama malembo osiyanasiyana osakanikirana ndi 2‰cellulose ether ndi chitsanzo chopanda kanthu kuti mphamvu ya konkire imachepetsedwa kufika pamlingo wina pamene ether ya cellulose ikuwonjezeredwa, ndipo kukula kwa kuchepa kwa mphamvu kumawonjezeka ndi kuwonjezeka kwa chizindikiro.

3. Kumaliza koyesera

(1) Kuwonjezera mapadi a cellulose kumatha kupititsa patsogolo kugwira ntchito kwa konkire yocheperako ndikuwongolera pompopompo.

(2) Ndi kuwonjezera kwa cellulose ether, kuchuluka kwa konkriti kumachepa, ndipo kuchuluka kwake, kumakhala kochepa kwambiri.

(3) Kuphatikizira cellulose ether kudzachepetsa mphamvu ya konkire, ndipo pakuwonjezeka kwa zomwe zili, kuchuluka kwa kuchepetsa kudzawonjezeka.

(4) Kuonjezera cellulose ether kudzachepetsa mphamvu ya konkire, ndipo ndi kuwonjezeka kwa kalasi, kukula kwa kuchepa kudzawonjezeka, kotero sikoyenera kugwiritsidwa ntchito mu konkire yapamwamba.

(5) Kuwonjezera pa cellulose ether kungagwiritsidwe ntchito kupititsa patsogolo ntchito ya C15, C20, ndi C25, ndipo zotsatira zake ndi zabwino, pamene kutaya mphamvu sikuli kwakukulu. Njira yopopera imatha kuchepetsa kwambiri mwayi wa kutsekeka kwa chitoliro ndikuwongolera magwiridwe antchito.