Keeb Kwm Thiab Kev Txhim Kho Ntawm Alkali Dawb Liquid Accelerator

Keeb kwm thiab kev loj hlob ntawm Alkali dawb kua accelerator

Non-alkaline kua ceev-teeb neeg ua hauj lwm (Alkali dawb kua accelerator) yog cov tshuaj admixtures uas ntxiv rau cov pob zeb ua kom nws qhov chaw ceev tsis tas siv cov khoom alkaline xws li cov cement. Cov keeb kwm ntawm cov neeg sawv cev no tuaj yeem taug qab mus rau nruab nrab -20th caug xyoo.

Xyoo 1950, kev tsim kho kev lag luam tab tom nrhiav txoj hauv kev los ua kom lub sij hawm tsim kho thiab txo cov nqi. Ib qho kev daws teeb meem yog siv cov neeg ua haujlwm ceev ceev kom nrawm lub sijhawm kho ntawm pob zeb. Txawm li cas los xij, alkaline qhov xwm txheej ntawm cov tshuaj tua kab mob sai sai xws li calcium chloride thiab qee cov organic compounds ua rau corrosion ntawm steel reinforcement thiab lwm yam teeb meem.

Nyob rau xyoo 1960, cov kws tshawb fawb tau tshawb pom tias qee yam tsis yog-alkaline tebchaw, xws li calcium lignosulfonate thiab naphthalene sulfonate formaldehyde condensate, muaj qhov cuam tshuam sai ntawm cov pob zeb uas tsis muaj qhov tsis zoo ntawm cov tshuaj alkaline.

Txij thaum ntawd los, cov uas tsis yog-alkaline kua ceev-teeb neeg ua hauj lwm (Alkali dawb kua accelerator) tau undergone loj hlob thiab txhim kho. Cov txheej txheem tshiab tau tsim muaj kev sib raug zoo nrog ntau hom cement thiab aggregate, nrog rau kev txhim kho kev ua haujlwm thiab khov-thaw tsis kam.

Tsis yog-alkaline kua ceev-teeb neeg ua hauj lwm (Alkali dawb kua accelerator) tau dhau los ua ib qho cuab yeej tseem ceeb rau kev tsim kho kev lag luam, ua kom lub sij hawm tsim kho sai thiab txo cov nqi. Lawv yog siv nyob rau hauv ib tug ntau yam ntawm daim ntawv thov, los ntawm precast pob zeb mus rau txoj kev tsim kho, thiab txuas ntxiv txhim kho nrog kev tshawb fawb thiab kev loj hlob.