Superplasticizer

Concrete Superplasticizer Overview

A water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete basically unchanged. Concrete mixture has a dispersing effect on cement particles, which can improve its workability, reduce the unit water consumption, improve the fluidity of concrete mixture; or reduce the unit cement consumption and save cement.

Types of water reducers

According to performance, it can be divided into ordinary water reducer, high-efficiency water reducer, and high-performance water reducer.
1) Ordinary water reducer refers to an admixture with a water reduction rate of not less than 8% under the condition that the slump of concrete is basically the same.

2) High-efficiency water reducer refers to an admixture with a water reduction rate of not less than 14% under the condition that the slump of concrete is basically the same.

3) High-performance water reducer refers to an admixture with a water reduction rate of not less than 25% under the condition that the slump of concrete is basically the same. Compared with high-efficiency water reducers, it has good slump retention performance, small drying shrinkage and certain air entrainment performance.

Due to the important contribution of high-efficiency water reducer to concrete modification, nws daim ntawv thov tau dhau los ua qhov kev sib tw thib peb hauv keeb kwm ntawm kev txhim kho pob zeb tom qab cov pob zeb muaj zog thiab prestressed pob zeb, uas tau enabled pob zeb los tsim los ntawm thawj phau ntawv pouring los yog dai tank pouring mus rau kev tsim kho, txuag neeg lub zog, txhim kho kev ua haujlwm zoo, ua kom zoo, tshem tawm suab nrov, thiab ua ib tug zoo leap nyob rau hauv lub technical theem thiab kev tsim kho theem ntawm pob zeb.

Mechanism ntawm kev ua ntawm dej reducer

1) Dispersion

Tom qab cov cement yog tov nrog dej, cov cement slurry tsim cov qauv flocculation, thiab 10% rau 30% ntawm cov dej sib tov yog qhwv hauv cov cement hais thiab tsis tuaj yeem koom nrog hauv kev khiav dawb thiab lubrication, yog li cuam tshuam cov fluidity ntawm cov pob zeb sib tov. Thaum cov dej reducer ntxiv, cov dej reducer molecules tuaj yeem yog cov kev taw qhia adsorbed rau saum npoo ntawm cov cement hais kom cov nplais ntawm cov cement yog tib yam nqi. (feem ntau tus nqi tsis zoo), tsim cov nyhuv electrostatic repulsion, ua kom cov cement particles sib cais, flocculation qauv kom disintegrate, thiab tso cov qhwv ib feem ntawm cov dej los koom rau hauv qhov ntws, yog li ua kom lub fluidity ntawm cov pob zeb sib tov.

2) Lubricating nyhuv

Cov pab pawg hydrophilic nyob rau hauv cov dej reducer yog heev polar. Cov dej reducer adsorption zaj duab xis nyob rau saum npoo ntawm cov cement hais tuaj yeem tsim cov dej khov dej ruaj khov nrog cov dej molecules. Cov yeeb yaj kiab dej no muaj cov txiaj ntsig zoo lubricating thiab tuaj yeem txo cov zawv zawg tiv thaiv ntawm cov cement hais kom cov kua dej ntawm cov pob zeb zoo dua..

3) Steric cuam tshuam

Lub hydrophilic sab chains nyob rau hauv cov dej reducer qauv txuas mus rau hauv cov aqueous tov thiab tsim ib tug hydrophilic peb-dimensional adsorption txheej ntawm ib tug tej thickness ntawm lub adsorbed cement hais.. Thaum cov cement particle ze ze, cov txheej adsorption pib sib tshooj, uas yog, steric hindrance tshwm sim ntawm cov cement hais. Qhov ntau overlaps, qhov ntau dua qhov steric repulsion thiab qhov ntau dua qhov cuam tshuam rau kev sib koom ua ke ntawm cov cement hais kom cov pob zeb tuav ib qho kev poob zoo..

4) Slow-tso nyhuv ntawm grafted copolymer sab chains

Thaum lub sij hawm kev npaj ntawm cov dej reducers tshiab, xws li polycarboxylic acid dej reducers, Qee cov saw hlau yog grafted ntawm cov molecules ntawm cov dej reducer. Cov saw hlau sab tuaj yeem tsis tsuas yog muab cov nyhuv steric hindrance tab sis kuj maj mam txiav tawm hauv qhov chaw siab alkalinity ntawm cov cement hydration., tso polycarboxylic acid nrog cov nyhuv dispersing thiaj li txhim kho cov nyhuv dispersion ntawm cov cement hais thiab tswj cov slump poob..

Vim li cas cov pob zeb yuav tsum tau txo cov dej?

Ib qho tseem ceeb parameter ntawm cov qhob mix ratio yog cov dej-cement ratio, uas yog, qhov ratio ntawm dej mus rau cementitious khoom. Qhov siab dua qhov dej-cement ratio, qhov zoo dua ntawm kev ua haujlwm ntawm cov yas yas tshiab, qhov yooj yim nws yog tsim, tab sis qhov qis zog ntawm pob zeb. Yuav kom daws tau qhov kev tsis sib haum xeeb no, Cov dej reducer yuav tsum tau ntxiv los txhim kho lub zog yam tsis muaj kev cuam tshuam kev ua haujlwm lossis txo cov cement ntau npaum thaum tswj kev ua haujlwm thiab lub zog..

Lub luag haujlwm tseem ceeb ntawm cov dej reducer yog txo cov dej siv ntawm cov pob zeb, thiab nws yog ib qho ntawm cov khoom siv tsis tseem ceeb rau cov khoom siv pob zeb. Lub zog ntawm pob zeb yog ze ze rau qhov dej-cement piv. Ntawm ib qho kev poob qis, qhov tsawg dua qhov kev siv dej, lub zog siab dua. Ntxiv cov dej reducer tuaj yeem txo cov dej haus thaum ua kom cov slump tsis hloov, yog li txhim kho lub zog ntawm pob zeb.

Hauv qib qis zog qis dua C30, kev siv cov dej reducer tuaj yeem txo cov cement noj, txo cov nqi, thiab txhim kho kev ua haujlwm ntawm cov pob zeb yas.

Nyob rau hauv nruab nrab lub zog qib ntawm C40 rau C50, a water reducer is generally required to ensure the workability (pumping) and strength of concrete.

For the high strength grade range above C50, without the use of a high-efficiency or high-performance water reducer, the concrete has basically no workability and cast-in-place concrete is difficult to construct.

Pumped concrete should be mixed with a pumping agent or water reducer, and mineral admixtures should be added; a high-performance water reducer with a water reduction rate of not less than 25% should be used for high-strength concrete above C60; mineral admixtures and slow-setting water reducer should be added to large-volume concrete.

Tuam txhab Profile

ConcreteFashion is the global leader in Low-Density Cellular Concrete (LDCC), Celluar Light Concrete (CLC), thiab advanced engineered ua npuas ncauj daws teeb meem. Paub thoob ntiaj teb rau nws txoj kev mob siab rau kev tshawb fawb, kev tsim kho tshiab, thiab siv kev txawj ntse, peb tau muab engineered ua npuas ncauj kev daws teeb meem txij li thaum ntxov 2012's.

Peb tuaj yeem muab cov khoom zoo superplasticizersuch asNaphthalene Superplasticizer, HPEG 2400 PolycarboxylateSuperplasticizer, High slump retaining type polycarboxylate superplasticizer admixture, Polycarboxylate Ether superplasticizerand otherPob zeb superplasticizer all over the world.

Lub tuam txhab muaj cov kws tshaj lij kev ua haujlwm thiab kev saib xyuas zoo, ib lub chaw kuaj mob zoo, thiab nruab nrog cov cuab yeej ntsuas qib siab thiab tom qab-muag kev pabcuam cov neeg siv khoom.Xa email rau peb lossis nyem rau ntawm cov khoom xav tau los xa cov lus nug.

Yog xav paub ntxiv txog Polycarboxylate Superplasticizer, thov koj xav tias dawb thiab tiv tauj peb: [email protected]

Package of Polycarboxylate Superplasticizer Powder

25Kg woven txheej hnab lined nrog lub hnab yas, khaws cia ntawm chav tsev kub kom deb ntawm lub teeb, noo noo thiab nag.

Storage of Polycarboxylate Superplasticizer Powder

Paper plastic composite packaging lined with plastic bags

FAQs of Concrete Superplasticizer

Q: Just how do superplasticizers function?
A: Superplasticizers work by dispersing concrete particles, minimizing inter-particle rubbing and allowing the mix to move more freely with less water.

Q: Can superplasticizers be utilized with all types of concrete?
A: The majority of superplasticizers are compatible with standard sorts of cement, but compatibility with details blends should be evaluated to make certain optimum efficiency.

Q: Puas muaj tej yam tsis zoo rau kev siv superplasticizers?
A: Thaum siv tau, superplasticizers qee zaum tuaj yeem tsim teeb meem xws li txhim kho ntshav poob yog tias siv ntau dhau lossis ncua sijhawm tsim. Kev ua kom zoo thiab kev sib xyaw yog tsim nyog.

Q: Kuv yuav khaws cov superplasticizers li cas?
A: Khaws superplasticizers hauv qhov zoo, qhuav qhov chaw, tiv thaiv los ntawm tshav ntuj ncaj qha thiab txias txias. Ua raws li cov chaw tsim khoom tsim kom tau txais txiaj ntsig zoo tshaj plaws.

Q: Dab tsi yog lub neej ncua ntawm superplasticizer?
A: Lub neej ncua sij hawm txawv nyob ntawm qhov zoo thiab qhov chaw cia khoom tab sis ib txwm nyob ntawm 6 hli mus rau ib xyoos. Tsis tu ncua tshuaj xyuas cov neeg tsim khoom xa mus.