Vim li cas thiaj tsim thiab siv Alkali Dawb Liquid Accelerators?

Vim li cas thiaj tsim thiab siv cov kua alkali dawb accelerators?

Alkali-free kua accelerators, hom accelerator no tuaj yeem daws qee yam teeb meem cuam tshuam nrog alkaline accelerators, xws li kev puas tsuaj rau kev tsim kho hauv av, kev phom sij ntawm alkali-tag nrho cov tshuaj tiv thaiv, kev puas tsuaj ntawm pH siab thaum siv, thiab poob tom qab lub zog hauv kev txhaj tshuaj. . Alkali-dawb kua accelerators sawv cev rau cov kev taw qhia ntawm kev loj hlob rau accelerators thiab yog ib tug inevitable qauv nyob rau hauv engineering daim ntaub ntawv. Nyob rau hauv xyoo tas los no, tsim cov kua qaub qis lossis alkali-dawb accelerators tau dhau los ua cov ntsiab lus tseem ceeb ntawm kev tshawb fawb hauv tebchaws thiab thoob ntiaj teb.

Qhov zoo ntawm alkali-dawb kua accelerator

Cov kua accelerators yog lub cim tshiab ntawm kev ua haujlwm siab, ntau lub zog ua haujlwm tau tshawb fawb los ntawm inorganic ntsev thiab organic polymers. Feem ntau siv cov ntaub ntawv hauv cov kua accelerators suav nrog txhuas sulfate, aluminium hydroxide, sodium fluoride, organic alkanolamines, thiab sorbitan acrylamide. Lawv tsim nyog rau kev tsim kho kev tsim kho, cov pob zeb hauv qab dej, thiab cov dej xau thaum muaj xwm txheej ceev. Cov kua accelerators tau pib siv rau ntawm qhov loj me, txo cov plua plav ntawm qhov chaw ua haujlwm, txo qhov poob ntawm lub zog tom qab hauv kev txhaj tshuaj, thiab txhim kho qhov zoo ntawm cov phiaj xwm phom sij. Cov kua accelerators muab faib ua ob hom raws li lawv cov kev ua tau zoo: alkaline thiab alkali-dawb. Ib txwm alkaline accelerators tuaj yeem yooj yim ua rau alkali-tag nrho cov tshuaj tiv thaiv hauv pob zeb, ua rau muaj kev puas tsuaj loj. Nyob rau hauv sib piv, cov kua alkali-dawb accelerators feem ntau nruab nrab los yog acidic me ntsis, tsis txhob siv cov alkaline tshuaj, zoo heev txo cov kev puas tsuaj rau tib neeg noj qab haus huv thiab qhov luaj li cas ntawm kev puas tsuaj rau pob zeb.

Cov yam ntxwv ntawm alkali-dawb kua accelerator

1. Tsawg npaum li cas (3% mus rau 7% ntawm cov cement pawg), ceev ceev thiab hardening ntawm cov cement pob zeb, nrog rau lub sij hawm luv luv pib thiab zaum kawg.

2.Zoo adaptability rau cov cement, ua tau raws li cov kev ntsuas kev ua tau zoo ntawm JC477-2005 "Accelerators for Shotcrete" tus qauv nyob rau hauv ntau npaum li cas ntawm 3% mus rau 7% ntawm cov cement loj.

3.High thaum ntxov lub zog ntawm cov pob zeb, nrog rau 1-hnub lub zog ntawm cov mortar piv txwv tshaj 10MPa, thiab tsawg kawg poob rau tom qab lub zog, ua tiav 90% mus rau 100% ntawm 28-hnub lub zog piv.

4.Tsis muaj kev cuam tshuam rau lub durability ntawm pob zeb. Qhov tsis muaj alkaline tshuaj nyob rau hauv alkali-dawb accelerators zoo heev txo qhov kev puas tsuaj ntawm pob zeb los ntawm kev qhia cov khoom alkaline, xws li alkali-tag nrho cov tshuaj tiv thaiv; lub caij no, cov ntsiab lus ntawm Cl- yog nruj me ntsis txwv tsis pub corrosion ntawm steel reinforcement.

5.Tsis muaj plua plav thaum lub sij hawm txau thiab txo rov qab, yog li tiv thaiv kev noj qab haus huv ntawm cov neeg ua haujlwm tsim kho thiab txo cov khoom pov tseg.

6.Zoo compactness thiab impermeability ntawm hardened pob zeb, haum rau kev npaj high-strength shotcrete.

7.Low rebound tus nqi thaum lub sij hawm txau, txuag nqi. Feem ntau, tus nqi rov qab ntawm kev txhaj tshuaj siv cov kua alkali-dawb accelerators hauv qhov kev txhawb nqa yog kwv yees li 15%, piv rau li 30% thaum siv cov tsoos hmoov accelerators. Yog li, kev siv cov kua alkali-dawb accelerators txo qis tus nqi rov qab thaum lub sij hawm ua vaj tse, yog li txo nqi kev tsim kho.

8.High mechanization theem thiab kev ua haujlwm sai. Cov kua alkali-dawb accelerators feem ntau yog siv hauv cov tshuab ntub dej ntub dej, uas yog cov cuab yeej siv tau zoo, txo qis kev siv zog thiab txo lub sijhawm rau kev txhawb nqa qhov av, ua kom cov kev tsim kho kom zoo.