Hydroxypropyl methylcellulose HPMC tuaj yeem txhim kho cov dej tuav ntawm mortar. Kev siv tshuaj tsawg dua ntawm hydroxypropyl methylcellulose HPMC tuaj yeem txhim kho cov dej tuav tus nqi ntawm mortar. Thaum cov koob tshuaj yog 0.02%, cov dej tuav tau nce los ntawm 83% nce mus rau 88%; Thaum cov tshuaj yog 0.2%, cov dej tuav tau mus txog 97%. Nyob rau tib lub sijhawm, cov ntsiab lus qis ntawm HPMC kuj tseem txo cov qib ntawm delamination thiab los ntshav tus nqi ntawm cov tshuaj khib nyiab, uas qhia tau tias HPMC tsis tuaj yeem txhim kho cov dej tuav ntawm lub mortar, tab sis kuj tseem txhim kho kev sib koom ua ke ntawm mortar, uas. yog ib qho tseem ceeb rau lub uniformity ntawm mortar tsim zoo. zoo siab heev.
Txawm li cas los xij, hydroxypropyl methylcellulose HPMC muaj qee qhov kev cuam tshuam tsis zoo rau lub zog flexural thiab compressive zog ntawm mortar. Nrog rau qhov nce ntawm hydroxypropyl methylcellulose HPMC cov ntsiab lus, lub zog flexural thiab compressive zog ntawm mortar maj mam txo. Nyob rau tib lub sijhawm, hydroxypropyl methylcellulose HPMC tuaj yeem ua kom lub zog tensile ntawm mortar. Thaum cov ntsiab lus ntawm hydroxypropyl methylcellulose HPMC yog nyob rau hauv 0.1%, lub zog tensile ntawm mortar nce tsis tu ncua nrog nce ntawm HPMC cov ntsiab lus, thaum cov ntsiab lus siab tshaj 0.1%, lub zog tensile yuav tsis nce ntxiv lawm. Hydroxypropyl methylcellulose HPMC kuj tseem tuaj yeem ua rau kom muaj zog ntawm cov khoom sib tsoo ntawm cov tshuaj khib nyiab. Ntxiv 0.2% HPMC tuaj yeem ua rau cov ntawv cog lus muaj zog ntawm 0.72MPa nce mus rau 1.16MPa.
Cov kev tshawb fawb tau pom tias hydroxypropyl methylcellulose HPMC tuaj yeem ua kom lub sijhawm txias ntawm cov tshuaj khib nyiab thiab txo qis qhov mortar, uas muaj txiaj ntsig zoo rau kev tsim kho pobzeb. Thaum HPMC tsis tau ntxiv, daim ntawv cog lus lub zog ntawm mortar txias rau 20 feeb txo los ntawm 0.72MPa rau 0.54MPa. Tom qab ntxiv 0.05% thiab 0.1% HPMC, daim ntawv cog lus lub zog ntawm mortar txias rau 20 feeb yog 0.8MPa thiab 0.84MPa, feem. Thaum HPMC tsis tau ntxiv, qhov slippage ntawm lub mortar yog 5.5mm. Nrog rau qhov nce ntawm HPMC cov ntsiab lus, qhov slippage txo qis tsis tu ncua. Thaum cov ntsiab lus yog 0.2%, slopage ntawm mortar poob mus rau 2.1 hli, thiab cov slippage yog heev txo. Thiab lwm yam txheej txheej nyias muab kev txhawb nqa.
Tsis tas li ntawd, hydroxypropyl methylcellulose HPMC tuaj yeem tiv thaiv kev tsim cov kab nrib pleb hauv cov khib nyiab thiab txo cov kab nrib pleb. Thaum cov ntsiab lus ntawm HPMC qis, qhov ntsuas qhov tawg tau txo qis nrog qhov nce ntawm cov ntsiab lus ntawm HPMC. Thaum cov ntsiab lus ntawm HPMC yog 0.1% thiab 0.2%, qhov txheeb ze tawg qhov ntsuas ntawm mortar yog 63% thiab 50%, feem. Tom qab cov ntsiab lus ntawm HPMC ntau dua 0.2%, cov kab nrib pleb ntawm cov tshuaj khib nyiab tsis muaj qhov txo qis dua.
Lub sij hawm xa tuaj: Plaub Hlis-11-2023