Cov cement tsis ntws zoo? Koj xav tau cov cement admixtures no

Yog tias cov addmixtures uas koj tab tom siv tsis txhim kho cov fluidity ntawm cement, please pay attention to these cement admixtures.

1. Tus tshuaj txo dej

Water-reducing agent can improve the fluidity of cement mortar under the condition of low water-cement ratio, reduce the water consumption for mixing without reducing fluidity, improve the compactness of cement hardening body structure and improve mechanical properties.Type of water reducer has a great impact on self-leveling mortar, polycarboxylic acid series water reducer is the third generation of water reducer developed after naphthalene series and melamine series water reducer, compared with the first two generations of water reducer, it has the advantages of low dosage, high water reduction rate, good liquidity retention ability, strong adaptability and so on.But the superplasticizer dosage is too much, not only can not improve the fluidity, tab sis yuav ua rau mortar sib cais thiab ntshav.

2. Tus tshuaj khaws dej

Tus tshuaj khaws dej tuaj yeem ua rau mortar muaj qhov sib xws thixotropic, txo kev evaporation thiab nqus dej, uas pab ntev sijhawm ua haujlwm thiab txhim kho kev ruaj khov. Tus tshuaj khaws dej yog ib hom qauv network peb-dimensional uas muaj polymer siab, muaj ntau pab pawg hydrophilic hauv cov qauv network uas txuas ua ke, uas tuaj yeem sib xyaw nrog cov molecule dej los tsim hydrogen bonds, thiab nqus tau dej ntau. Cov tshuaj khaws dej siv hauv cement mortar yog cellulose ether, feem ntau muaj methyl hydroxyethyl cellulose ether (MHEC), methyl hydroxypropyl cellulose ether (MHPC) thiab methyl cellulose ether (MC).Kev khaws dej thiab kev sib xws ntawm slurry yuav hloov raws li qhov ntau ntxiv, viscosity and fineness of cellulose ether.

3.Redispersible latex powder

Redispersible latex powder can effectively improve its cement mortar tensile bond strength, wear resistance, toughness, anti-permeability, improve liquidity, stability and volume shrinkage also has a certain effect.Commonly used are vinyl acetate and vinyl copolymer powder, vinyl chloride and vinyl laurate copolymer powder, vinyl acetate and vinyl and higher fatty acid vinyl ester copolymer powder.After the re-dispersible emulsion powder is mixed into cement, the emulsion is formed in water and evenly distributed in the cement slurry. The polymer dispersion forms a film on the surface of the hydrate and finally forms a continuous polymer network structure.The cross – linking and permeation of hydrate and thin film improve the structure of the slurry.When the cement body is stressed, lub network polymer tuaj yeem nqus thiab xa zog tau zoo, yog li txwv tsis pub tsim thiab nthuav dav ntawm cov kab tawg.

Cie-China.org yog tus thawj coj ua npuas ncauj qhob ntxiv muab cov pob zeb ua npuas ncauj ua npuas ncauj, superplasticizer,Ua npuas ncauj qhob lub zog enhancer rau lub teeb yuag pob zeb, CLC blocks. Yog tias koj tab tom nrhiav superplasticizer, thov koj xav tias dawb rau tiv tauj peb.