Simenti-mchenga matope chifukwa njerwa zomangamanga

The njira mwachizolowezi kwa yomanga nyumba mtundu simenti-mchenga amapangidwa ndi kuyanjana ndi mbali ziwiri zomwe zikuthandizira: mchenga ndi simenti. Kufanana njira kwa yomanga nyumba chimakhala 1: 4 chiŵerengero kapena 1: 6. Cholinga cha njira ina iliyonse ndi kuteteza kusamutsidwa ku njerwa ndi mzake. Choncho, njira yothetsera njerwa mu nyumba zomangamanga yekha amaloŵamo compressive katundu ndi kusamutsidwa. N'chifukwa chake ichi mtundu wa njira chochepera. Nthawi zina, njira akhoza kuwonjezeredwa dongo kapena laimu, zigawo zikuluzikulu ndi zina amalola kuti apereke yankho la plasticity ndi flowability. Nthawi zina, akhoza kugwiritsidwa ntchito m'malo laimu kusamba ufa kapena sopo. Koma pamene atagona njerwa , osakaniza amenewa idzayenda mu mipata onse akupezeka njerwa, amene ali zoyipa pa katundu matenthedwe chimateteza.

yankho A zakonzedwa kuti njerwa m'njira yosavuta kumva: kusakaniza popanga zofunika (simenti ndi mchenga) mu mawonekedwe youma ndi mu kusanganikirana wotsatira pamaso ntchito ndi madzi. Kuyenera yomweyo anakonza pang'ono njira (analimbikitsa buku 25-30 malita). Koma ngati njerwa kuika ndondomeko ikuchitika manja pang'ono, kapena podziona ntchito mwamsanga wambirimbiri nthawi inu athanso kugwira kusinja wambirimbiri njira, ndipo ayenera kugwiritsidwa ntchito ndi chosakanizira cha akamavutika.

Njira yothetsera zomangamanga monga tatchulazi, lakonzedwa kudzaza malo opanda pakati njerwa munthu, midadada kapena zipangizo miyala yomanga. Ndipo kotero mtundu wa njira zimakhudzanso ndi yodalirika ndi mphamvu ya dongosolo lonse motero durability ntchito zake.

Njira yothetsera yomanga nyumba wapangidwa ndi mitundu iwiri ya zigawo ndi fillers ndi binders. Malinga zigawo kumangako kusiyanitsa njira mpweya akuchiritsa, madzi akuchiritsa, komanso hayidiroliki. Childs ntchito zomangamanga njira yoyamba. Malinga ndi kuchuluka kwa binders mu njira iwo anawagawa yosavuta zovuta. The njerwa ntchito njira zambiri zophweka. Mu nkhani iyi, binder mwina simenti kapena laimu. Njira zovuta za binders angagwiritsidwe ntchito imodzi, mwachitsanzo, simenti-laimu, laimu, simenti, dongo, etc. njira izi zovuta chagwiritsidwa kwa zowalamulira enieni kumene m'pofunika kuti njira anali katundu mkulu pulasitiki.

yankho la njerwa koma lophatikizana ndi ubwamunalo linagawanika mphamvu. Chilemba chizindikiro akufunitsitsa kapena mawu ena yankho angathe komabe katundu compressive. Njira zothetsera ntchito zowalamulira, ndinakhala pa sukulu zotsatirazi: 0; 2; 4; 10; 25; 50; 75 100. Kwa ntchito kutchula - hydro yomanga ndi njira yomanga wapadera ingagwiritsidwe ntchito zizindikiro 150 200. chizindikiro Izi amakhala ndi maonekedwe a svezheottayavshego mwatsopano kapena njira kuti sanalandire elasticity koma okwanira ndi mphamvu pa zolinga ndi kuumitsa. Kuti muone chizindikiro opangidwa therefrom njira kyubu ndi m'mphepete 7 cm. Ndipo pambuyo 28-denvnogo akuti solidification umagwiritsidwa thereto mphamvu compressive. Kutentha kwa zasayansi zingasiyane 15 25 madigiri Celsius kuti kuphatikiza. Mmene chopangidwa zitatu zomwe zili njira ndi mipanda anapangidwa kumayambiriro kwa chiwiya chako chokandiramo ufa, pakati ndi kumapeto kwa ndondomeko kusanganikirana.

Komanso mphamvu makhalidwe a matope chifukwa zomangamanga ayenera madzi posungira ndi magawo ikuyenda. magawo awa kulola njira uniformly lembani onse danga pa matabwa, chimene kumapangitsa kuti bwino makhalidwe njira ndi lumikiza wa njerwa (miyala) pamwamba.