1. Cov nyhuv ntawm kev hloov kho cov cement yog cuam tshuam los ntawm cov khoom sib xyaw

Qhov kev pom ob-txheej dhau los tuaj yeem piav qhia tau zoo txog cov nyhuv plasticizing ntawm kev ntxiv cov dej reducers rau pob zeb. Rau cov pob zeb sib xyaw nrog ntau yam kev sib xyaw ua ke, txawm hais tias tus nqi ntawm cov cement siv tau raug txo rau qee qhov, cov dej reducer ntxiv yog ob npaug ntawm cov pob zeb zoo tib yam. Ib feem ntawm qhov kev tshawb fawb no yuav tsum nyiam cov neeg ua haujlwm cuam tshuam. Tsis tas li ntawd, nyob rau hauv qee qhov ultra-high-strength concretes, lub zog thiab lub zog hloov pauv ntawm cov pob zeb npaj nrog cov superplasticizers sib txawv heev. Yog vim li cas rau qhov tshwm sim no yuav tsum ze ze rau cov nyhuv ntawm surfactants ntawm cement hydration. Cov pob zeb ua haujlwm siab nrog cov dej-cement piv nrog cov yas yuav pom qhov tshwm sim "phaj" kaum feeb tom qab sib tov, uas yog, tom qab cov pob zeb tawg, nws yuav sai sai no qhia qhov tshwm sim tsis tseeb yog tias nws tsis tau nplawm, thiab cov qhob qis qis kuj nyuaj. Txawm li cas los xij, qhov tshwm sim no tsis pom tseeb hauv cov pob zeb sib xyaw uas tsis muaj plasticizers. Yuav ua li cas zam thiab piav qhia qhov teeb meem no tsim nyog tham.

2. Kev hloov pauv ntawm cov cement yog cuam tshuam los ntawm cov khoom sib xyaw

Nyob rau hauv txoj kev tsim kho tiag tiag, qhov teeb meem no feem ntau tshwm sim, uas yog, nyob rau hauv tib qhov sib xyaw sib piv, cov khoom siv sib xyaw thiab kev tsim kho, hom thiab batch ntawm cement lossis admixtures hloov, uas ua rau muaj qhov sib txawv loj hauv fluidity thiab slump ntawm configured pob zeb. Lub ntsiab yog vim li cas rau qhov tshwm sim yog vim li cas xws li cov cement ntxhia muaj pes tsawg leeg, conditioned gypsum thiab cement fineness ua rau kom ceev ceev thaum lub sij hawm ua vaj tse. Yog li ntawd, kev kawm tag nrho ntawm cov teeb meem ntawm cov cement adaptability yog qhov tsim nyog rau kev paub zoo ntawm kev siv thiab ntau npaum li cas ntawm admixtures.

3. Kev cuam tshuam ntawm kev siv ib puag ncig rau cov nyhuv ntawm cov khoom sib xyaw

Rau cov pob zeb uas muaj cov yas sib txawv, thaum qhov kub ntawm ib puag ncig yog qhov tsim nyog, qhov poob qis thiab poob ntawm cov pob zeb ua tau zoo dua li cov uas tau txais nyob rau hauv qhov kub thiab txias, tab sis yog nyob rau lub caij ntuj no, cov pob zeb tsis muaj qhov sib txawv loj, uas yuav cuam tshuam rau txoj kev tsim kho rau qee yam.