Kwanan Wata:10, Nuwamba,2025

Matsakaicin adadin admixtures ba ƙayyadadden ƙima ba ne kuma yana buƙatar daidaitawa da ƙarfi bisa ga halaye na albarkatun ƙasa, nau'in aikin da yanayin muhalli.

(1) Tasirin kaddarorin siminti Abubuwan da ke cikin ma'adinai, fineness da nau'in gypsum na siminti kai tsaye suna ƙayyade buƙatun admixture. Siminti tare da babban abun ciki na C3A (> 8%) yana da ƙarfin adsorption mai ƙarfi don masu rage ruwa kuma adadin yana buƙatar ƙarawa da 10-20%. Don kowane haɓakar 50m2/kg a cikin takamaiman yanki na siminti, ana buƙatar ƙara adadin mai rage ruwa da 0.1-0.2% don rufe babban yanki. Don ciminti tare da anhydrite ( abun ciki na gypsum dihydrate <50%), adadin adsorption mai rage ruwa yana jinkirin kuma ana iya rage adadin da kashi 5-10%, amma ana buƙatar tsawaita lokacin haɗawa don tabbatar da rarraba iri ɗaya.

(2) Tasirin ma'adinan ma'adinai Abubuwan haɓaka halayen haɓakar ma'adinai irin su ash ash da slag foda za su canza tasiri mai tasiri na admixtures. Ƙarfin adsorption na Class I tashi ash (rabin buƙatun ruwa ≤ 95%) don masu rage ruwa shine kawai 30-40% na siminti. Lokacin maye gurbin 20% na ciminti, ana iya rage yawan adadin ruwa ta 5-10%. Lokacin da takamaiman yanki na slag foda ya fi 450m2 / kg, adadin admixture yana buƙatar ƙara 5-8% lokacin maye gurbin 40% na ciminti. Lokacin da aka haxa ash da foda foda a cikin wani rabo na 1: 1 (jimlar sauyawa adadin 50%), za a iya rage yawan adadin ruwa da kashi 3-5% idan aka kwatanta da tsarin foda guda ɗaya saboda haɓakar halayen adsorption na biyun. Saboda babban yanki na musamman na silica fume (> 15000m2 / kg), mai rage yawan ruwa yana buƙatar ƙara yawan kashi 0.2-0.3% don kowane 10% na ciminti ya maye gurbin.

(3) Tasirin kaddarorin tara abubuwan da ke cikin laka da rarrabuwar ɓangarorin ƙima sune mahimman tushe don daidaita sashi. Ga kowane 1% karuwa a cikin ƙurar dutse (<0.075mm barbashi) a cikin yashi, ya kamata a ƙara yawan adadin ruwa da 0.05-0.1%, kamar yadda tsarin porous na dutsen dutse zai shafe admixture. Lokacin da abun ciki na nau'in allura da tara flake ya wuce 15%, yakamata a ƙara yawan adadin ruwa da kashi 10-15% don tabbatar da rufewa. Haɓaka matsakaicin girman girman ɓangarorin ƙaƙƙarfan ƙima daga 20mm zuwa 31.5mm yana rage ƙimar mara amfani, kuma ana iya rage adadin ta 5-8%.
Matsakaicin adadin admixtures ba ƙayyadadden ƙima ba ne kuma yana buƙatar daidaitawa da ƙarfi bisa ga halaye na albarkatun ƙasa, nau'in aikin da yanayin muhalli.

(1) Tasirin kaddarorin siminti A abun da ke ciki na ma'adinai, fineness da gypsum nau'i na siminti kai tsaye ƙayyade bukatun admixture. Siminti tare da babban abun ciki na C3A (> 8%) yana da ƙarfin adsorption mai ƙarfi don masu rage ruwa kuma adadin yana buƙatar ƙarawa da 10-20%. Don kowane haɓakar 50m2/kg a cikin takamaiman yanki na siminti, ana buƙatar ƙara adadin mai rage ruwa da 0.1-0.2% don rufe babban yanki. Don ciminti tare da anhydrite ( abun ciki na gypsum dihydrate <50%), adadin adsorption mai rage ruwa yana jinkirin kuma ana iya rage adadin da kashi 5-10%, amma ana buƙatar tsawaita lokacin haɗawa don tabbatar da rarraba iri ɗaya.

(2) Tasirin ma'adinan ma'adinai Abubuwan haɓaka halayen haɓakar ma'adinai na ma'adinai irin su ash ash da slag foda zai canza tasiri mai tasiri na admixtures. Ƙarfin adsorption na Class I tashi ash (rabin buƙatun ruwa ≤ 95%) don masu rage ruwa shine kawai 30-40% na siminti. Lokacin maye gurbin 20% na ciminti, ana iya rage yawan adadin ruwa ta 5-10%. Lokacin da takamaiman yanki na slag foda ya fi 450m2 / kg, adadin admixture yana buƙatar ƙara 5-8% lokacin maye gurbin 40% na ciminti. Lokacin da aka haxa ash da foda foda a cikin wani rabo na 1: 1 (jimlar sauyawa adadin 50%), za a iya rage yawan adadin ruwa da kashi 3-5% idan aka kwatanta da tsarin foda guda ɗaya saboda haɓakar halayen adsorption na biyun. Saboda babban yanki na musamman na silica fume (> 15000m2 / kg), mai rage yawan ruwa yana buƙatar ƙara yawan kashi 0.2-0.3% don kowane 10% na ciminti ya maye gurbin.

(3) Tasirin kaddarorin tara abubuwan da ke cikin laka da rarrabuwar ɓangarorin ƙima sune mahimman tushe don daidaita sashi. Ga kowane 1% karuwa a cikin ƙurar dutse (<0.075mm barbashi) a cikin yashi, ya kamata a ƙara yawan adadin ruwa da 0.05-0.1%, kamar yadda tsarin porous na dutsen dutse zai shafe admixture. Lokacin da abun ciki na nau'in allura da tara flake ya wuce 15%, yakamata a ƙara yawan adadin ruwa da kashi 10-15% don tabbatar da rufewa. Haɓaka matsakaicin girman girman ɓangarorin ƙaƙƙarfan ƙima daga 20mm zuwa 31.5mm yana rage ƙimar mara amfani, kuma ana iya rage adadin ta 5-8%.