Kwanan Wata: 26, Dec, 2022
1. Ruwa Mai Rage Kankare Admixtures
Abubuwan da ke rage ruwa su ne samfuran sinadarai waɗanda idan aka haɗa su da kankare na iya haifar da ɓacin rai da ake so a ƙaramin siminti na ruwa fiye da yadda aka saba kera shi. Ana amfani da abubuwan da ke rage ruwa don samun takamaiman ƙarfin kankare ta amfani da ƙananan siminti. Ƙananan abubuwan da ke cikin siminti suna haifar da ƙananan hayaki na CO2 da amfani da makamashi kowane ƙarar siminti da aka samar. Tare da irin wannan admixture, simintin Properties an inganta da kuma taimaka sanya kankare a karkashin wahala yanayi. An yi amfani da masu rage ruwa da farko a cikin benayen gada, da siminti maras arha, da simintin faci. Ci gaba na baya-bayan nan a fasahar hada-hada ya haifar da haɓakar masu rage ruwa mai tsaka-tsaki.
2. Concrete Admixtures: Superplasticizers
Babban manufar yin amfani da superplasticizers shine don samar da kankare mai gudana tare da babban slump a cikin kewayon inci bakwai zuwa tara don amfani da shi a cikin kayan da aka ƙarfafa da yawa da kuma wurare inda ba za a iya samun isasshen ƙarfi ta hanyar girgiza ba. Wani babban aikace-aikacen shine samar da siminti mai ƙarfi a w/c daga 0.3 zuwa 0.4. An gano cewa ga yawancin nau'ikan siminti, superplasticizer yana inganta aikin siminti. Matsala ɗaya da ke da alaƙa da yin amfani da babban kewayon mai rage ruwa a cikin kankare ita ce asara. Ana iya yin siminti mai ƙarfi mai ƙarfi wanda ke ɗauke da superplasticizer tare da juriya mai tsayi, amma abun cikin iska dole ne a ƙara dangi da kankare ba tare da superplasticizer ba.
3. Concrete Admixtures: Set-Retarding
Saita retarding kankare admixtures ana amfani da su jinkirta da sinadaran dauki faruwa a lokacin da kankare fara saitin tsari. Ana amfani da waɗannan nau'ikan abubuwan haɗin kai na kankare don rage tasirin yanayin zafi wanda zai iya samar da saitin siminti cikin sauri. Saita retarding admixtures ana amfani da a kankare ginin pavement, ba da damar ƙarin lokaci don kammala kankare pavements, rage ƙarin halin kaka don sanya sabon kankare batch shuka a kan wurin aiki da kuma taimaka kawar da sanyi gidajen abinci a cikin kankare. Hakanan za'a iya amfani da retarders don tsayayya da tsagewa saboda nau'in jujjuyawar da zai iya faruwa lokacin da aka sanya shingen kwance a cikin sassan. Yawancin masu ragewa kuma suna aiki azaman masu rage ruwa kuma suna iya shigar da iska cikin kankare
4. Concrete Admixtures: Air-entraining Agent
Simintin da ke shigar da iska zai iya ƙara daskare-narkewar da kankare. Irin wannan nau'in haɗakarwa yana samar da simintin da za a iya aiki fiye da simintin da ba a haɗa shi ba yayin da yake rage zubar jini da kuma rabuwa da sabo. Ingantacciyar juriya na kankare zuwa aikin sanyi mai tsanani ko daskare/narkewar hawan keke. Sauran fa'idodi daga wannan admixture sune:
a. Babban juriya ga hawan keke na wetting da bushewa
b. Babban darajar aiki
c. Babban darajar karko
Kumfan iskan da aka haɗa suna aiki azaman maƙasudin jiki akan fashewar da damuwa ke haifar saboda ƙarar ƙarar ruwa a cikin yanayin sanyi. Air nishadi admixtures sun dace da kusan duk wani kankare admixtures. Yawanci ga kowane kashi ɗaya cikin ɗari na iskar da aka shigar, ƙarfin matsawa zai ragu da kusan kashi biyar.
5. Concrete Admixtures: Accelerating
Ana ƙara haɓakar siminti masu rage raguwa zuwa siminti yayin haɗawar farko. Wannan nau'in haɗakarwa na iya rage bushewa da wuri da na dogon lokaci. Za a iya amfani da raguwar abubuwan haɗin gwiwa a cikin yanayi inda raguwar raguwa zai iya haifar da matsalolin ɗorewa ko inda adadi mai yawa na raguwa ba a so don dalilai na tattalin arziki ko fasaha. Rage haɗe-haɗe na iya, a wasu lokuta, rage ƙarfin haɓakawa a farkon shekaru da na gaba.
6.Concrete Admixtures: Rage Ragewa
Ana ƙara abubuwan haɗin kankare masu rage raguwa zuwa kankare yayin haɗawar farko. Wannan nau'in haɗakarwa na iya rage bushewa da wuri da na dogon lokaci. Za a iya amfani da raguwar abubuwan haɗin gwiwa a cikin yanayi inda raguwar raguwa zai iya haifar da matsalolin ɗorewa ko inda adadi mai yawa na raguwa ba a so don dalilai na tattalin arziki ko fasaha. Rage haɗe-haɗe na iya, a wasu lokuta, rage ƙarfin haɓakawa a farkon shekaru da na gaba.
7. Concrete Admixtures: Lalata-Hana
Lalata-hana admixtures fada cikin musamman admixture category kuma ana amfani da su rage lalata na ƙarfafa karfe a kankare. Masu hana lalata na iya rage ƙimar kulawa da kayan aikin siminti da aka ƙarfafa a cikin rayuwar sabis na yau da kullun na shekaru 30 - 40. Sauran abubuwan haɗaka na musamman sun haɗa da haɗakar rage raguwa da masu hana alkali-silica reactivity. Abubuwan da ke hana lalata ba su da ɗan tasiri akan ƙarfi a cikin shekaru masu zuwa amma na iya haɓaka haɓaka ƙarfin da wuri. Calcium nitrite tushen lalata inhibitors yana haɓaka lokutan saiti na kankare akan kewayon yanayin zafi sai dai idan an ƙirƙira su tare da saiti na baya don daidaita tasirin haɓakawa.
Lokacin aikawa: Dec-27-2022
