Lub teeb yuag qhob ntxiv | Kev Ua Haujlwm Siab Ua Foaming Cov Neeg Sawv Cev Rau Cov Khoom Siv Ntawm Tes
Dab tsi yog qhov txhais ntawm tus txo dej?
Tus tshuaj txo dej yog ib hom khoom sib xyaw pob zeb, uas tuaj yeem txhim kho kev ua haujlwm ntawm pob zeb, txo kev siv zog hauv kev tsim kho, thiab txhim kho kev ua haujlwm ntawm kev tsim kho. Hauv pob zeb, ib qho tshuaj txo dej raug ntxiv rau hauv qhov sib tov kom faib cov pob zeb cement, uas tuaj yeem txhim kho kev ua haujlwm ntawm pob zeb cement. Nyob rau hauv qhov xwm txheej ntawm kev khaws cov pob zeb nplaum ruaj khov, ntxiv ib qho tshuaj txo dej tuaj yeem txo tau kev siv dej ntawm cov pob zeb sib xyaw thiab txo qhov piv dej-cement ntawm pob zeb, nce zog thiab ruaj khov ntawm pob zeb reinforced. Los yog nyob hauv tib yam xwm txheej ntawm kev ua haujlwm thiab muaj zog ntawm pob zeb nplaum, Ntxiv cov tshuaj txo dej tuaj yeem txo qhov ntau ntawm cement siv thiab txuag cement.. However, Muaj qee qhov teeb meem hauv kev siv superplasticizer hauv pob zeb.. Piv txwv li, Thaum feem ntau ntawm superplasticizer ions yog anionic surfactants., Yuav muaj qee yam khoom xws li lignin sulfonate., Naphthalene sulfonate formaldehyde polymer., etc..
Yuav ua li cas ua cov tshuaj txo dej.?
Siv methyl naphthalene thiab sulfur trioxide ua cov khoom raw., Los ntawm sulfonation., Condensation., Neutralization thiab lwm yam kev tiv thaiv., Thaum kawg, cov khoom tau los ntawm kev qhuav..
Cov teeb meem nrov ntawm kev nqus pob zeb nplaum.: Kev cuam tshuam ntawm cov tshuaj txo dej rau dej ntws tawm.
Raws li txoj kev ua haujlwm ntawm tus tshuaj txo dej., Cov molecule polar nqus ib ncig ntawm cov cement., Ua kom cov khoom sib txeeb., Kev txo flocculation., releasing the water covered by cement particles, and thinning the adsorbed water layer on the surface of cement particles, greatly reducing the wetting water required. According to this mechanism, the water-reducing agent can increase the free water amount in fresh concrete and increase the bleeding water. But on the other hand, because of the water-reducing effect of water-reducing agent, the mixing water needed for concrete with the same slump degree greatly reduces the water, so that the concrete can extract free water to reduce water. The final bleeding condition depends on which function is dominant.
The adaptability of admixtures and cement also affects the bleeding of concrete.
What are the main research directions of concrete water reducer in the future?
(1) The production of water reducer materials can be further optimized the synthesized. Through the selection of production materials and the change of production technology, the molecular structure of water reducer is optimized to improve the adaptability between water reducer and cement, so as to enhance the effect of water reducer.
(2) Two or more high-efficiency water-reducing agents should be compound prepared in a certain proportion, so as to change the performance of each part at the same time and to bring internal coordination to produce a superposition effect.
(3) From the direction of polymer development of new efficient water reducer, comprehensively optimize the concrete strength and durability, thiab lwm yam, so as to reduce production costs.
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.