Njira yolondola yogwedera ndi njira yogwiritsira ntchito konkriti

Kodi Kugwedezeka kwa Konkriti ndi Chiyani?

Kugwedezeka kwa konkriti kumachitika kuti konkriti igwirizane. Cholinga chachikulu cha kugwedezeka ndikutseka konkriti ndikukwaniritsa kuchuluka kwa konkriti. Pafupifupi 5 mpaka 8% ya voliyumu ya konkriti yomwe yayikidwa kumene mu mawonekedwe ake imakhala ndi thovu la mpweya. Thovu la mpweya limakhala pamalo awa mu konkriti yogwira ntchito bwino kwambiri.

Kugwedezeka kwa konkriti

Chifukwa ndi momwe angagwirizanitsire konkriti

Kodi ndi chinthu chiti chomwe chimakhudza kwambiri mphamvu ya konkriti kuposa china chilichonse? Mainjiniya ambiri anganene kuti chiŵerengero cha madzi ndi simenti… pamene chiŵerengero cha madzi ndi simenti chikuwonjezeka mphamvu zimachepa. Duff Abrams adawonetsa izi mu 1919, ndipo lamulo la Abram ndilo mfundo yomwe ili kumbuyo kwa njira zambiri zowerengera kuchuluka kwa konkriti zomwe zimagwiritsidwa ntchito masiku ano. Koma Abtams adachita mayeso ake pa konkriti yolumikizidwa kwathunthu. Pokhapokha ngati konkriti yalumikizidwa bwino, mabowo amachepetsa mphamvu mosasamala kanthu za chiŵerengero cha madzi ndi simenti. Ndipo, monga momwe zasonyezedwera pa Chithunzi 1, zotsatira zake ndi zazikulu.

Konkire ikangoyikidwa, imakhala ndi mpweya wotsekeredwa wa 20%. Kuchuluka kwake kumasiyana malinga ndi mtundu wosakanikirana ndi kutsika, kukula ndi mawonekedwe ake, kuchuluka kwa chitsulo cholimbitsa, ndi njira yoyika simenti. Pa chiŵerengero chokhazikika cha madzi ndi simenti, peresenti iliyonse ya mpweya imachepetsa mphamvu yokakamiza ndi pafupifupi 3% mpaka 5%. Kuphatikiza konkire, nthawi zambiri chifukwa cha kugwedezeka, kumawonjezera mphamvu ya konkire potulutsa mpweya wotsekeredwa. Zimathandizanso kulimbitsa mphamvu ya sbond ndikuchepetsa kulowa kwa simenti.

Kugwedezeka ndi njira ya magawo awiri

Kodi kugwedezeka kumalimbitsa bwanji konkriti? Chithunzi 2 chikuwonetsa kuti ndi njira ya magawo awiri. Chovibrator chimapanga mafunde omwe amalekanitsa tinthu tating'onoting'ono tomwe timaphatikizana, kuchepetsa kukangana pakati pawo.

Chithunzi 1. Mlingo wa kulimbitsa ungakhale ndi mphamvu yokakamiza mofanana ndi chiŵerengero cha madzi ndi simenti. Konkire yotsika kwambiri ingakhale ndi mpweya wotsekeka mpaka 20% ikayikidwa.

Chithunzi 2. Chovibrator chimaphatikiza konkire m'magawo awiri. Mafunde oyamba amasungunula konkire kuti iyende bwino ndipo mafunde opitilira amachotsa thovu la mpweya.

CHOLINGA

Kulowa moyimirira mainchesi angapo mu lifti yakale (yomwe sikuyenera kukhala yolimba) ya nthawi yokhazikika yokhazikika kumapereka kulimbitsa kokwanira.

ZIDZABWERERANA

Kulowa mwachisawawa kwa vibrator pa ngodya zonse ndi malo ocheperako popanda kuya kokwanira sikungatsimikizire kuphatikizana kwapafupi kwa zigawo ziwirizi.

Ma thovu a mpweya amatha kuchotsedwa pochepetsa kuchuluka kwa madzi ofunikira, koma zimakhudza kugwira ntchito kwa konkriti. Chifukwa chake, kugwedezeka kwa konkriti ndiyo njira yokhayo yoyenera yomwe imathandiza popanda kusokoneza katundu konkire yatsopano. Kugwedezeka kumakhudzidwa kokha mu konkire yatsopano yosakanikirana kapena munthu anganene mpaka nthawi yomwe konkire imatha kuyenda. Gawoli limakhalapo musanayambe kukhazikitsa koyamba.

Kukanikiza konkire kapena Kugwedezeka kwa konkire kungachitike m'njira zisanu zosiyanasiyana monga:
1- Kugwedeza konkriti mkati mwa kuyika chigoba chamkati mu simenti.
2- Kugwedeza konkire pokonza chitseko pogwiritsa ntchito ma vibrators a Shutter formwork.
3- Mwa kugwedeza unyinji wonse wa konkire pogwiritsa ntchito tebulo logwedezeka.
4- Kugwedeza konkire panja pa nthaka pogwiritsa ntchito ma vibrators pamwamba.
5- Kugwedeza konkire pogwiritsa ntchito zogwedeza zitsulo.

Kugwedezeka kwa Konkire Malangizo
1- Musagwedeze konkire kwambiri chifukwa imalola kuti chisakanizocho chisweke ndikulekanitsidwa. Komanso, musagwedeze konkire kwambiri chifukwa mpweya ukhoza kukhala utatsekeredwa m'zigawo zapansi za simenti, zomwe zimapangitsa kuti konkire ikhale yofooka yomwe imasweka mosavuta ndi mphamvu yochepa.
2- Njira yodziwika kwambiri yogwiritsira ntchito vibrator yamkati ndikutulutsa vibrator pang'onopang'ono, pa liwiro la pafupifupi mainchesi 25mm pa sekondi. Ngati thovu likutulukabe pamene vibrator ya konkire ikuchotsedwa, kugwedezeka kwambiri ndikofunikira.
3- Kuti mupewe kuzizira komwe kumalumikizana ndi konkriti pamene izi zimathiridwa ndi wosanjikiza watsopano wa simenti, onetsetsani kuti mwalowa bwino mu kutsanulira ndi vibrator ndikusakaniza mu wosanjikiza womwe unathiridwa kale ndi womwe wayikidwa kumene.
4- Kuti mugwire bwino ntchito, gwiritsani ntchito mayendedwe oyima okha mukagwedezeka kuti mukhale ndi chisakanizo chofanana cha aggregate ndi konkire. Kuyenda molunjika kungayambitse kufalikira kosagwirizana ndipo kumawonjezera kuthekera kwa vibrator kumangika mu rebar kapena reinforcement steel.
5- Pewani kugwiritsa ntchito vibrator ngati chida choyikira konkire chifukwa sichipanga malo ofanana ndipo chingayambitse mavuto ambiri pakulimba ndi mawonekedwe a kapangidwe kake.
6- Gwiritsani ntchito mtundu woyenera wa vibrator ya konkriti kutengera kapangidwe kake kapena kukula kwa malo ogwirira ntchito. Ganizirani kugwiritsa ntchito vibrator ya konkriti yopepuka pang'ono pantchito zazing'ono kuti ikhale yogwira ntchito bwino komanso yogwira ntchito bwino.
7- Ganizirani kukhala ndi chosungira chovibrator cha konkire kuti mukhale ndi chida china chosinthira nthawi yomweyo ngati choyamba chikukumana ndi mavuto aliwonse pantchito.