Kusungidwa kwa madzi kwa HPMC mumatope omanga

Monga ife tonse tikudziwa, chiphunzitso cha hydration wathunthu simenti amafuna 26% ya misa simenti, ndi kumwa kwenikweni madzi matope kwambiri kuposa madzi chofunika hydration simenti mu matope, amene makamaka kukumana ndi zomanga.Mphamvu ya mwala wa simenti imagwirizana kwambiri ndi chiŵerengero cha madzi-simenti.Kuchuluka kwa chiŵerengero cha madzi-simenti, kumapangitsanso kulimba kwa mwala wa simenti, kumachepetsa mphamvu ya mwala wa simenti, ndipo kumachepetsa mphamvu ya matope.Choncho, malinga ngati ntchito yosungiramo madzi ya matope a miyala imatsimikizira kugwira ntchito kwa matope ndi chinyezi chofunikira kuti hydration ya simenti ikhale mumatope.

Ngati kusungirako madzi kwa matope a miyala ndi abwino kwambiri, madzi enieni omwe amasungidwa mumatope adzakhala aakulu, chiŵerengero chenicheni cha simenti yamadzi pamatope chidzakhala chachikulu, mphamvu yeniyeni ya matope idzakhala yochepa, ndipo mphamvu ya mgwirizano. adzachepanso.kutsitsa.Kuphatikiza apo, kusungirako madzi kwa matope ndikwabwino kwambiri, ndipo madziwo samatengeka mosavuta ndi zinthu zotchinga, zomwe zingakhudzenso kugwirizana pakati pa matope a simenti ndi zida za block, ndikutalikitsa nthawi yoyika matope, potero. zimakhudza liwiro la zomangamanga ndikuwonjezera zovuta zomanga.Chifukwa chake, index yosungira madzi ya matope amiyala iyenera kufanana ndi ya block block.

Ngati mawonekedwe a pore a block block ndi otseguka, ndipo zinthu zotchinga zimatha kulowa mosavuta ndi madzi, monga njerwa zowotchedwa, kusungidwa kwamadzi kwa matope omangira kumatha kukhala kotsika, ndipo zopitilira 80% zitha kugwiritsidwa ntchito, monga njerwa wamba. kuthamangitsidwa ndi matope achikhalidwe kuti azimanga bwino kwambiri.

Ngati mawonekedwe a pore a block block atsekedwa, porosity ndi yokwera, zinthu zotchinga sizimalowetsedwa mosavuta ndi madzi, kapena zida zotchinga siziloledwa kunyowetsedwa ndi madzi pakumanga, ndiye kuti kusungidwa kwamadzi kwa matope amiyala kuyenera. onjezerani chinyontho chamatope kuti chikwaniritse sing'anga Chofunika kuti simenti ikhale ndi madzi.Mwachitsanzo, pomanga njerwa za laimu-mchenga wa autoclaved, ngati matope okhala ndi madzi osungira madzi a 80% amagwiritsidwa ntchito pomanga njerwa za laimu-mchenga, kusungirako madzi kwa matope kumakhala kochepa, ndipo chinyezi mumatope ndichosavuta. kumezedwa ndi laimu.Njerwa zamchenga, zomwe zimapangitsa kuchepa kwakukulu kwa madzi ofunikira kuti simenti isungidwe m'malo olumikizirana matope, kotero kuti simenti ya simenti imatha kuyendetsedwa bwino, kuchepetsa mphamvu yeniyeni ya matope ndi mphamvu yolumikizira matope ndi njerwa yamchenga. .Ichinso ndi chimodzi mwazifukwa zomwe zomangira matope achikhalidwe ndizosavuta kung'amba.Choncho, kusungirako madzi kwa matope a njerwa zomangira kuyenera kuyendetsedwa pamwamba pa 88%.

Komabe, ngati tiwonjezera madzi osungiramo madzi a matope a njerwa zamatabwa mpaka 95%, zidzakhala zovuta kuyamwa chinyezi pamalumikizidwe amatope, mphamvu yeniyeni ya matope idzachepa, ndi mphamvu ya mgwirizano. pakati pa njerwa ndi khoma zidzachepanso.Tondo ndi njerwa zidzachepetsedwa.Kusungirako madzi kwa matope ndikwabwino kwambiri, njerwa sizili zophweka kumamatira kumatope panthawi ya zomangamanga, ndipo matope amakhala okhazikika, ndipo kutalika kwa matope kumakhala kochepa.

Choncho, kusungirako madzi kwa hydroxypropyl methylcellulose mumatope a masonry sikokwanira, ndipo zipangizo zosiyana siyana ziyenera kukhala ndi madzi osungira madzi.