Vuli ena veivakauqeti ni Superplasticizer ena iyau simede

Na iwalewale ni veivakauqeti ni palasitika ena iyau simede

Na superplasticizer e bibi sara e dua na mataqali iyaya ni tara vale, ena kena vakayagataki na foam kei na bubului kei na so tale na bubului sol ., ka duidui na nodra itovo kei na iwalewale ni kena buli ., e vakavuna na palasitika ionic. Ni oti na kena vakacurumi na palasitika ena veiwaki simede, ena curuma yani na dela ni tikitiki ni simede na palasitika. Raraba, rauta ni 80% ni superplasticizer ena vakayagataki ena veitikitiki ni simede, me rawa ni ra maroroya na ituvaki ni vakasoqoni vata ena dua na gauna balavu ka sega na kena veisoliyaki. Ni sega ni vakacurumi na palasitika, simede ena tiko kina e dua na levu ni kasi (rauta ni 2%), e buli mai na levu ni bubble e sega ni tautauvata, kei na veiwasei e sega ni tautauvata sara. Ni oti na kena vakacurumi na palasitika ki na simede, the distribution of concrete parameters can maintain good properties and improve the working performance of concrete, such as the tensile strength of concrete. Vakavo ga, adding superplasticizer in concrete mixing will help reduce water consumption in concrete mixing. The tiny sol air bubbles generated will help fill the micro-pores in concrete, significantly improve the anti-permeability of concrete, and enhance its chemical anti-corrosion and anti-aging ability. The superplasticizer can be integrated into the free water migration of internal materials, which helps to alleviate the static superplasticizer pressure and enhance the resistance of concrete to a repeated freeze-thaw cycle. Superplasticizer can slow down the hydration reaction speed of cement in the middle and late stage, vakavinakataka na kaukauwa ni simede ka vakatorocaketaka na kena cakacaka ni anti-vakarabailevutaki .. Koya gona, ni veiwaki na simede, me ikuri ni vakasamataki ni oneone ., vatu, simede kei na so tale na iyaya vakaitaukei ., veiganiti na ikuri ni dua na levu ni superplasticizer me vakavinakataki kina na vakayagataki ni cakacaka simede ..

1) Na veivakauqeti ni palasitika levu ena lutu ni simede vou veiwaki

Ni vakadikevi na cakacaka kei na fluidity ni simede ., e dua na ivakatakilakila bibi sara e dua na lutu. Na levu cake ni kena isau ., na vinaka cake ni fluidity ni simede .. Na lusi ni slump e dusia na duidui ni slump simede e vakarautaki tale ni oti e dua na gauna kei na kena slump taumada .. Na veika e veivakauqeti e oka kina na simede ., ivakarau ni vakasoqoni vata kei na ratio ni wai-simede, kei na so tale. Na mataqali superplasticizer talega e dua na ka bibi ni veivakauqeti. Ena itekivu ni 30min, Na palasitika ni veitarataravi ni naftalini e levu duadua na kena yali na simede, akaude ni 60%, tarava mai na veitarataravi ni melamine vakailesilesi (30%) kei na polikarboksiliki asidi ni veitarataravi ni palasitika (20%), ka vakaraitaka ni sa ikoya na itataqomaki vinaka duadua ni simede. Mai na kena iwalewale ni kena buli ., tabana ni polycarboxylic asidi superplasticizer ena iyaya simede ena adsorbed ena dela ni simede, me vaka na sala ni trapezoidal e laiva na simede ni molecule ni polimer ni adsorption na tabana e buli mai na veivakacacani ni livaliva e levu cake na kena revurevu, vakalevutaka na kena tudei, o koya gona na simede ni kena vakacurumi na ivakarau ni asidi ni oti na palasitika, e rawa ni vakalailaitaka sara vakalevu na lusi ni slump.

(2) Na veivakauqeti ni superplasticizer ena kaukauwa ni veivakasaurarataki ni simede vou veiwaki.

Na kaukauwa ni simede e vakarautaki mai na veimataqali superplasticizer e duidui na kena revurevu .. Ena kena vakayagataki na palasitika, e rawa ni vakalailaitaka sara vakalevu na veiwaki ni simede veiwaki vakayagataki ni wai ., vakavinakataka na ivakatagedegede ni wai ni simede, vakavinakataka na simede ena veiyabaki yadua . (3 d, 7 d kei na 28 d) kaukauwa, e rawa ni mai na tolu e oka kina na superplasticizer cecere ni cakacaka ni simede kaukauwa ni veivakasaurarataki era a cecere sara mai na kena ni kaukauwa ni veivakasaurarataki simede lala ., 3 d, 7 d, kei 28 d kaukauwa ni veivakasaurarataki vakalevutaki na iwiliwili e cecere me vaka na . 15%, 20%, kei 30% veitaravi. Vakavo ga, na mataqali simede kei na kaukauwa cecere duadua ni veivakasaurarataki ena itekitekivu ni simede veiwaki vata kei na polyhydroxy asidi superplasticizer ., kei na kena kaukauwa ni veivakasaurarataki e cecere talega ni oti na 1990. 28 siga. Ia, the concrete composed of naphthalene series superplasticizer has relatively low compressive strength in the early stage, which indicates that its early strength performance is relatively poor.

(3) Influence of superplasticizer on the early cracking performance of freshly mixed concrete

Physical and chemical reactions will occur between concrete with admixtures, simede, kei na veiwaki. A kind of superplasticizer is in the concrete that some kind of cement place forms relatively small slump, appear in another kind of cement however relatively big slump loss may appear, do not exist so the superplasticizer that has a good effect to any kind of cement. In the actual evaluation of concrete quality, commonly used evaluation indicators mainly include concrete slump and strength, but it is easy to ignore the volume stability of concrete, easy to induce early shrinkage cracks, may accelerate concrete cracking, affect the durability and safety of the building structure. From the factors that affect the early cracking of the concrete, in addition to wind speed and ambient temperature, the type and amount of admixture are also very important factors.

The test shows that the maximum crack width and crack area of concrete formed by melamine-based superplasticizer are the smallest, among which the crack area is only 76% of the corresponding value of polycarboxylic acid superplasticizer and 52% of the corresponding value of naphthalene superplasticizer. The maximum crack width was only about 40% of the corresponding value of polycarboxylic acid and naphthalene superplasticizer. In the early crack cracking time of concrete, na veivakauqeti ni veimataqali veiwaki e sega ni bibi, ka semati ki na veivakaduiduitaki kei na so tale na ka.

(4) Na veivakauqeti ni superplasticizer ena dede ni simede vou veiwaki

Na superplasticizer ena bula balavu ni simede e dua na kena revurevu levu cake, vakaraitaki vakalevu me vaka: (1) na revurevu ni simede frost thaw veivala. Ena vuku ni lailai ni ratio ni wai kei na simede ., na vinaka cake ni veivala ni batabata-thaw ni simede. Ena kena vakacurumi na palasitika levu kei na kena revurevu ni cagi, na veivala ni batabata-thaw ni simede e vakavinakataki sara vakalevu. Na levu ni cagi e dodonu me lewai ena rauta ni . 2%, kei na kena levu duadua e sega ni dodonu me sivia na 100. 6%. Ke sega, na kaukauwa kei na durability ni simede ena vakaleqai vakalevu ..

(2) na veivakauqeti ni sega ni rawa ni curu na simede. Ratio ni wai kei na simede, me vaka na ka levu e tara na kena sega ni rawa ni curu na simede, kevaka e levu cake na kena isau mai na . 0.55, ena sivia na vakayagataki ni wai ni simede hydration ka bulia e vuqa na qara ni dra ena simede ., vakalevutaka na kena rawa ni curu na simede. Kevaka e lailai sara na ratio ni wai kei na simede ., na cakacaka ni simede ena vakaleqai kei na anti-permeability ni simede ena vakaleqai.

Cie-Jaina.org sa ikoya na iliuliu ni foam simede additives vakarautaka na simede foaming vakailesilesi ., palasitika,foam simede kaukauwa vakatorocaketaki me baleta na simede mamada, Buloko ni CLC. Kevaka o vakasaqara tiko na . vakaiyalayala, yalovinaka vakila na galala mo veitaratara kei keda.