Umbala we-Granite nokukhethwa kwamatshe kwemishini yokunemba yezimboni.

Emkhakheni wokwakha kanye nezimboni, i-granite isetshenziswa kakhulu ngenxa yokuqina kwayo, ukuminyana, ukumelana ne-asidi kanye ne-alkali, nokumelana nesimo sezulu. Okulandelayo ukuhlaziya okuningiliziwe kwakho kokuthi umbala wegwadle uthinta ukuminyana kwawo nokuthi ungayikhetha kanjani igwadle ezinzile emkhakheni wemishini yokunemba yezimboni.
Ubudlelwano phakathi kombala nokuminyana kwegwadle
I-Granite yakhiwa ngokuyinhloko ngamaminerali afana ne-quartz, i-feldspar ne-mica, futhi umbala wayo uncike ezinhlotsheni kanye nenani lezingxenye eziqukethe. Ngokombono wokuminyana, kukhona ukuxhumana okuthile phakathi kombala nokuminyana, kodwa akuwona ubuhlobo obuqondile bembangela.

 

Umehluko wokwakheka kwamaminerali: Okunombala okhanyayo gI-ranite, efana nombala ompunga-omhlophe kanye nobomvu benyama, ivame ukucebile nge-quartz ne-feldspar. Lawa maminerali amabili anokuqina okuphezulu futhi azinzile. Ukuminyana kwequartz kusuka ku-2.6 kuye ku-2.7g/cm³, kuyilapho lokho kwe-feldspar kuyahlukahluka kusuka ku-2.5 kuya ku-2.8g/cm³ kuye ngohlobo. Ukuchichima kwamaminerali anjalo kuholela enkambisweni yokukhuphuka kokuminyana okuphelele kwegwadle elinombala okhanyayo. I-granite emnyama, efana nomnyama nokuluhlaza, ngokuvamile iqukethe inani eliphezulu lamaminerali ensimbi ne-magnesium kanye namaminerali amnyama njenge-amphibole ne-biotite. Ukuminyana kwe-amphibole cishe ku-3.0-3.4g /cm³, futhi lokho kwe-biotite cishe ku-2.7-3.1g /cm³. Nokho, lapho igwadle elimnyama liqukethe izakhi zensimbi ezisindayo (njengensimbi ne-manganese), ukuminyana kwayo kuzokwanda.

 

Izinga lokucwebezela kanye nomthelela wesakhiwo: Umbala kwesinye isikhathi ungabonisa umehluko wezinga lokucwebezela kanye nesakhiwo segwadle. I-Granite enezinga eliphezulu le-crystallization kanye nesakhiwo esiminyene inombala ofanayo futhi ozinzile, futhi ukuminyana kwayo kuphakeme kakhulu. Lokhu kungenxa yokuthi izinhlayiya zamaminerali zihlelwe eduze futhi zinesisindo esikhulu ngevolumu yeyunithi. I-Granite enekristalu empofu kanye nesakhiwo esixekethile kungenzeka ibe nemibala emacabhacabhakabhaka futhi engalingani, izikhala eziningi zangaphakathi, kanye nokuminyana okuphansi.
Ukukhethwa kwe-Granite emkhakheni wemishini yokunemba yezimboni
Emkhakheni wemishini yokunemba yezimboni, izidingo zokuzinza zegwadle ziphezulu kakhulu. Ngokuvamile, i-granite efanelekile ikhethwa ngokucubungulisisa izici eziningi:

Ukubunjwa kwamaminerali kanye nesakhiwo: I-Granite enokuqukethwe okuphezulu nokusabalalisa okufanayo kwe-quartz ne-feldspar kuyakhethwa. Lolu hlobo lwe-granite lunesakhiwo sangaphakathi esizinzile, esinganciphisa ngokuphumelelayo ukuguqulwa okubangelwa izinguquko ekucindezelekeni kwangaphakathi nokuqinisekisa ukusebenza okuzinzile kwesikhathi eside kwemishini. Phakathi naleso sikhathi, i-granite enezinga eliphezulu le-crystallization, izinhlayiya ezinhle nezifanayo, kanye nesakhiwo esiminyene kuyisinqumo esikhethwayo. Ngesikhathi sokusetshenziswa kwesikhathi eside nokuphoqelela ukusetshenziswa, ingagcina kangcono ukunemba futhi inciphise umthelela wezinguquko zayo zesakhiwo ekunembeni kwemishini.

Izinkomba zokusebenza ngokomzimba: I-Granite idingeka ukuthi ibe nenani eliphansi lokumunca amanzi, ngokuvamile elingaphansi kuka-0.5%, ukuze kuvinjelwe izinkinga ezifana nokunwetshwa kwevolumu nokunciphisa amandla okubangelwa ukumuncwa kwamanzi, okungase kuthinte ukunemba kwemishini. I-coefficient yokunwetshwa kwe-thermal kufanele ibe phansi. Ngokufanelekile, kufanele ibe ngaphansi kuka-8×10⁻⁶/℃ ukuze unciphise izinguquko ezinobukhulu obubangelwa ukuhlukahluka kwezinga lokushisa. Ngaphezu kwalokho, amandla okucindezela kufanele abe phezulu, ngokuvamile abe mkhulu kuno-150MPa, ukuqinisekisa ukuthi angakwazi ukumelana namandla ahlukahlukene ngesikhathi sokusebenza kwemishini.
Izinhlobo ezivamile ezinconyiwe: I-Jinan Green Granite, i-Indian Black, i-South African Black kanye nezinye i-granite emnyama, iningi labo elimnyama ngombala, eliminyene ngokwakheka, eline-coefficient ephansi yokwanda okushisayo nokumelana nokugqokwa okuhle, futhi ifanele izisekelo zemishini yokuhlola i-optical enezidingo eziphezulu kakhulu zokunemba nokuzinza. I-Sesame granite emhlophe, enombala okhanyayo, izinhlayiya zamaminerali ezifanayo, nobulukhuni obuphezulu namandla, isetshenziswa kabanzi emishinini yokukhiqiza ama-chip e-elekthronikhi futhi ingahlangabezana nezidingo zokuma okunemba okuphezulu nokusebenza okuzinzile kwesikhathi eside kwemishini.

Sengiphetha, nakuba kukhona ukuhlobana okuthile phakathi kombala nokuminyana kwegwadle, lapho kukhethwa igwadle endaweni yemishini enembayo yezimboni, kuyadingeka ukuba kubhekwe kabanzi izici eziningi ezifana nokwakheka kwamaminerali, ukwakheka, kanye nezakhiwo ezibonakalayo ukuze kuqinisekiswe ukunemba okuphezulu nokuzinza kwemishini.