Daim Ntawv Thov Kev Siv Dej-txo Tus Neeg Ua Haujlwm Siab

1. Molecular Structure Customization

Ib tug polycarboxylate dej-txo tus neeg sawv cev nrog ib sab saw ntom ntawm ≥1.2 ib nm² yog xaiv. Nws cov nyhuv steric hindrance tuaj yeem txo qhov kev puas tsuaj ntawm cov txheej txheem adsorption los ntawm qhov kub thiab txias. Thaum ntxiv nrog 30% ya tshauv admixture, cov dej txo qis tuaj yeem ncav cuag 35% -40%, nrog rau ib teev poob qis dua 10%. Qhov no high-sab saw density polycarboxylate dej-txo tus neeg sawv cev ua ib tug tuab adsorption txheej nyob rau saum npoo ntawm cov cement hais, muab muaj zog steric repulsion, cia cov cement hais kom muaj ib tug zoo dispersed lub xeev txawm nyob rau hauv high-kub ib puag ncig. Tsis tas li ntawd, qhov sib ntxiv ntawm cov tshauv ya ya tsis tsuas yog txo qis kev siv cov cement thiab txo cov cua sov ntawm cov dej, tab sis kuj tsim cov nyhuv synergistic nrog cov dej-txo tus neeg sawv cev, ntxiv txhim kho kev ua haujlwm thiab ua haujlwm ntawm cov pob zeb.

2. Slump-Preserving Synergistic TechnologyKev taw qhia ntawm methyl allyl polyoxyethylene ether monomer tsim cov qauv peb sab. Nyob rau hauv ib puag ncig simulated ntawm 50 ° C, ua ke nrog cov khoom tiv thaiv retarding, cov pob zeb nthuav dav tuaj yeem khaws cia siab tshaj 650mm rau 120 feeb, ua tau raws li cov kev xav tau ntawm cov vaj tse ultra-high-rise. Kev taw qhia ntawm methyl allyl polyoxyethylene ether monomers hloov kho cov qauv molecular ntawm polycarboxylate superplasticizer, tsim cov qauv peb-seem sib txuas uas txhim kho nws lub peev xwm los ntim thiab tawg cov cement hais. Nyob rau hauv ib puag ncig kub, cov qauv no zoo tiv thaiv kev cuam tshuam los ntawm cov khoom siv cement hydration, tswj cov dej ntws thiab cov pob zeb. Thaum siv los ua ke nrog cov khoom siv retarding, nws tuaj yeem ua rau tib lub sijhawm ncua cov cement hydration thiab tswj cov slump, ua tau raws li qhov xav tau ntawm kev ua haujlwm siab, xws li hauv cov twj tso kua mis ultra-high-rise.