Hnub Tim:30,Feem kawg,2022

A. Tus neeg sawv cev dej

Ib qho ntawm cov tseem ceeb ntawm cov dej txo tus neeg sawv cev yog txo qis cov dej sib luag thiab ua kom tau cov dej tsis hloov pauv, yog li kom tau raws li kev yuav tsum tau ua haujlwm thiab kev tsim kho. Feem ntau cov dej ntws tawm admixtures muaj cov tshuaj solutage saturated. Yog tias cov tshuaj khov kho tau dhau lawm, cov nqi txo qis yuav tsis nce, thiab kev los ntshav thiab sib cais yuav tshwm sim. Lub noo noo tau cuam tshuam nrog ob qho tib si lub pob zeb cov khoom nyoos thiab cov pob zeb ua kom sib xyaw.

 

1. Naphthalene superplasticizer

Naphthalene superplasticizertuaj yeem faib ua cov khoom lag luam siab (na -so4 cov ntsiab lus <3%) thiab cov khoom nruab nrab ntawm cov khoom lag luam ntawm na -so4. Qhov ntau npaum li cas ntawm naphthalene series dej reducer: cov hmoov yog 0.5 ~ 1.0% ntawm cov cement loj; Cov ntsiab lus muaj cov ntsiab lus ntawm cov kev daws teeb meem feem ntau yog 38% ~ 40%, cov lej sib tov yog 1.5% ~ 0.5% kev txo nqi dej yog 18% 30%. Naphthalene series dej reducer tsis yog los ntshav, thiab muaj qhov cuam tshuam me ntsis rau lub sijhawm teem sijhawm. Nws tuaj yeem sib xyaw nrog sodium gluconate, suab thaj, citricycarboxylic acid thiab inorganic acid thiab inorganic retarder, thiab uas muaj peev xwm uas tsim nyog tswj tau. Qhov tsis zoo ntawm qhov qis taws naphthalene series dej reducer yog tias cov ntsiab lus ntawm sodium sulfate yog loj. Thaum qhov kub yog qis dua 15 ℃, sodium sulfate crystallization tshwm sim.

 

2. Polycarboxylic Acid Superplasticizer

Polycarboxylic AcidDej reducer tau txiav txim siab ua ib tiam dej tshiab ntawm kev ua tau zoo dej reducer, thiab cov tib neeg ib txwm xav kom nws muaj kev nyab xeeb dua cov tsoos naphthalene series dej reducer hauv kev thov. Cov txiaj ntsig kev ua tau zoo ntawm polycarboxylic acid hom dej txo tus neeg sawv cev (feem ntau 255% kev nkag siab, thiab tsawg kawg nkaus tag nrho alkali cov ntsiab lus.

Txawm li cas los xij, hauv kev xyaum,Polycarboxylic AcidDej reducer tseem yuav ntsib qee cov teeb meem, xws li: 1. Kev cuam tshuam dej ntawm cov ntsiab lus ntawm cov xuab zeb thiab pob zeb thiab qhov zoo ntawm cov ntxhia hlob; 2. Cov dej txo thiab poob qis los ntawm kev cuam tshuam rau ntau ntawm cov tshuaj uas txo tus neeg sawv cev dej, thiab nws nyuaj rau kev ua kom poob qis nrog ntau npaum li cas noj; 3. Kev siv lub zog siab lossis siab zog ua kom muaj qhov ntau ntawm kev noj dej, thiab kev nkag siab me me ntawm kev siv dej yuav ua rau muaj kev hloov pauv loj; 4. Muaj teeb meem sib xyaw nrog lwm hom dej uas txo cov neeg sawv cev thiab lwm yam admixtures, lossis txawm tias tsis muaj cov nyhuv superiPosition; 5. Qee zaum cov pob zeb muaj cov dej los ntshav, huab cua loj, thiab loj thiab ntau lub npuas; 6. Qee lub sijhawm ntsuas kub yuav cuam tshuam rau cov nyhuv ntawmPolycarboxylic AcidDej reducer.

Yam cuam tshuam rau qhov sib xyaw ntawm cov xis thiabPolycarboxylic AcidDej Reducer: 1. Qhov sib piv ntawm C3Af thiab C3af thiab C3AF thiab C3S nce, C3A nce, thiab cov dej haus cov qhob zuj zus. Thaum nws cov ntsiab lus tseem ceeb tshaj 8%, qhov poob qis ntawm cov qhob ua kom nce; 2. Cov ntsiab lus ntau dhau los yog me me me me alkali cov ntsiab lus yuav cuam tshuam cuam tshuam rau lawv cov kev sib raug zoo; 3. Qhov tsis zoo ntawm Caas Admixture kuj yuav cuam tshuam txog kev sib raug ntawm ob; 4. Cov ntaub ntawv gypsum sib txawv; 5. Kev kub siab qeeb qeeb yuav ua rau qhov chaw nrawm thaum kub tshaj 80 ℃; 6. Fri ees tshiab muaj cov cuab yeej hluav taws xob thiab muaj peev xwm nqus dej reducer; 7. Qhov tshwj xeeb thaj tsam ntawm cov cement.