Thaum qhov kub qis, qhov dej ntws qeeb qeeb, uas cuam tshuam rau kev ua haujlwm ntawm kev tsim kho. Thaum qhov kub poob qis dua qhov khov, dej hloov mus ua dej khov, nthuav dav, thiab yooj yim ua rau muaj qhov tsis zoo xws li qhov khoob thiab tev tawm. Tom qab dej qhuav, qhov khoob sab hauv nce ntxiv, ua rau lub zog ntawm cov pob zeb txo qis.
Lub zog ntawm cov mortar feem ntau nyob ntawm qhov nrawm thiab lub sijhawm ntawm cov cement thiab dej. Thaum tsim kho qis dua 0 ° C, dej khov, thiab txawm hais tias hydration yog qhov exothermic reaction (uas muab qee qhov kub hydration), qhov ua tau zoo ntawm cov cement reaction tseem txo qis. Thaum qhov kub nce siab tshaj 0 ° C, dej khov yaj, thiab hydration rov qab - tab sis lub voj voog no yeej txo qis cov cement lub zog.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-17-2025