Hlahloba ka Tsoelo-pele ea Lipatlisiso ea Superplasticizer

Superplasticizer ke mofuta oa motsoako oa konkreite, e ka ntlafatsang ts'ebetso ea konkreite, fokotsa tšebeliso ea matla a kaho le ho ntlafatsa katleho ea kaho. Ka konkreite, water reducing agent is added to the mixture of cement particles to get dispersion effect and to optimize the working performance of cement. Tlas'a boemo ba ho boloka konkreite slump kamehla, mixing and subtract agent can greatly reduce the unit water use of concrete mixture, reduce the water cement ratio of concrete, the strength and stability of the reinforced concrete. Or in the concrete workability and strength of the same condition, adding water reducer can reduce the unit of cement, boloka samente. Leha ho le joalo, the application of superplasticizer in concrete also has some problems, such as the majority of superplasticizer ions being anionic surfactants, lignin sulfonate, naphthalene sulfonate formaldehyde polymer, etc..

According to the water-reducing effect of superplasticizer ea konkreite, superplasticizer ea konkreite can be divided into the following three categories:

(1) Ordinary water-reducing agent, hape e tsejoa e le plasticizer, sekhahla sa eona sa ho fokotsa metsi ha se ka tlase ho 8%, the main component is lignin sulfonate;

(2) High-effect water-reducing agent, e tsejoang hape e le superplasticizer, water reduction rate is not less than 14%, the main component is represented by tea water-reducing agent;

(3) High-performance superplasticizer, water reduction rate is not less than 25%, regarding polycarboxylic acid series superplasticizer as a representative.

Hajoale, the new type of high efficiency water reducing agent has the following five categories:

(1) Polycarboxylate superplasticizer (carboxylic acid water reducing agent): poly carboxylic acid system has a lot of chain between the molecules of water reducing agent of some strong polarity in the main chain anions with surface bonded to a piece of electricity. The formation of hydration film can not only enhance the adsorption force between molecules but also produce space steric effect as well as good plasticizing effect. But this water reducer is expensive, which makes its application be limited to some extent, and make it has strong selectivity to defoaming agent and air-entraining agent. Hajoale, the polycarboxylate superplasticizer with the best comprehensive efficiency is the high performance superplasticizer.

(2) Naphthalene series high-efficient superplasticizer: naphthalene series high-efficient superplasticizer has electrostatic repulsion effect, molecular repulsion between electric charges, just on the cement in the hydration process of its own flocculation has a certain decomposition effect, so that free water drainage it contained would be reduced, and the water reduction effect is obvious. Ha ho bapisoa le letoto la polycarboxylic acid superplasticizer, Naphthalene series superplasticizer e na le theknoloji e batlang e holile ka theko e tlase.

(3) Aminosulfonic acid letoto la superplasticizer: aminosulfonic acid series superplasticizer is a non-air-entraining resin type high-efficiency superplasticizer, the water reduction rate can reach more than 25%, which make the concrete workability and durability have significant enhancement. Leha ho le joalo, theko ea tlhahiso ea sulfamic acid series superplasticizer e batla e phahame. Ha boima ba molek'hule bo le nyane haholo kapa bo le boholo haholo, ho bonolo ho baka mali, karohano le ho thatafatsa. Hajoale, the research of this kind of water-reducing agent is mostly through modifying aminosulfonic acid and dispersing cement particles, which can effectively reduce the shortcomings in use and expand the market prospect.

(4) Lignosulfonate superplasticizer e fetotsoeng: modified lignosulfonate superplasticizer is made by modifying lignosulfonate. Lignin sulfonate e ncha e fetotsoeng ke sesebelisoa se phahameng sa ho fokotsa metsi, the water-reducing rate is 1.5 times higher than that of the ordinary water-reducing agent, and the hydration heat and collapse degree of cement are changed to effectively ensure the excellent performance of concrete, mme theko ya tlhahiso e tlase, e loketseng kaho.

(5) Setsi se fokotsang metsi a Hybrid: se fokotsang metsi se kopanngoa ka ho kopanya quaternary copolymer acrylate graft copolymer., contains amino benzene sulfonic acid maleic acid amide and vinyl pyrrole copolymer, and at the same time other copolymer containing sulfonic acid and carboxylic acid based collection to a piece, thus using the functions of their different anion and polarity of functionality, can be used as a super plasticizer all kinds of polymer and copolymer, thereby interacting with cement particles. Tlhahiso ea superplasticizer e tsoakiloeng e rarahane, 'me optimization ea ho kopanya chelete e hloka liteko tse ngata.

Cie-China.org ke mofani ea ka sehloohong oa li-additives tsa konkreite ea foam e fanang ka konkreite e foqohang, superplasticizer,foam konkreite e matlafatsang bakeng sa konkreite e bobebe, Li-block tsa CLC. Haeba u batla superplasticizer, ka kopo ikutloe u lokolohile ho iteanye le rona.