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首頁> 外文學位 >Spent fluid catalytic cracking catalyst (FCC) applications in the preparation of hydraulic binders: Pozzolanic properties study (Spanish text).
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Spent fluid catalytic cracking catalyst (FCC) applications in the preparation of hydraulic binders: Pozzolanic properties study (Spanish text).

機譯：廢流化催化裂化催化劑（FCC）在制備水硬性粘結劑中的應用：火山灰性能研究（西班牙語）。

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At the present work the replacement of Portland cement in pastes and mortars by spent fluid catalytic cracking catalyst (FCC) is studied. The study has been focused in four physicochemical characterization, hydrated lime/catalyst and cement/catalyst pastes and mortars studies, and environmental impact aspects.; The FCC characterization establishes that it is a silicoaluminate, having a mainly amorphous structure, with a great specific surface, and that is necessary its mechanical activation (grinding) to obtain a pozzolanic behaviour material.; The reactivity was studied by: thermogravimetry, X ray diffractometry, aqueous media electrical conductivity measurements, Fourier transform infrared spectroscopy, scanning electron microscopy, mechanical strength development evaluation and cementing effectiveness k-factor evaluation.; The very high pozzolanic activity of the material has been demonstrated, besides that this reactivity has been superior to others similar products such as the metakaolin.; The products formed in the hydration, pozzolanic and hydration catalysis of cement reactions have been studied, comparing the reactivity characteristics with others better known pozzolans.; The nature of the reaction products between FCC and hydrated lime is similar to the ones formed by the metakaolin, being fundamentally calcium silicate hydrates and hydrated gehlenite, and their formation allow to obtain microstructures with higher mechanical strength.; The possibility of preparation materials containing cement/FCC with improved mechanical strength and drying shrinkage has been demonstrated, compared to homologous materials without ground FCC.; The optimal FCC dosage for the lime fixation maximization has been determined, showing a pozzolanic behaviour similar to metakaolin, nevertheless very superior to others studied pozzolans, behaviour that is improved with the aid of certain chemical activators, and with the increasing of the curing temperature.; Measurements of electrical conductivity in aqueous media have confirmed the great FCC pozzolanic activity, being compared with matakaolin and silica fume.; Mechanical strength studies on pastes and mortars have confirmed the high pozaolanic activity of the catalyst, obtaining k-factor values bigger than the unity.; In spite that the FCC contains minority elements with potential harmful environmental impact, it has been demonstrated that those elements are fixed by the conglomerate matrix, bringing an adequate construction material also from the environmental point of view.*; *Originally published in DAI Vol. 63, No. 1. Republished here with corrected author name.
機譯：在目前的工作中，研究了用廢液催化裂化催化劑（FCC）替代糊漿和灰漿中的波特蘭水泥。該研究集中在四個物理化學特征，熟石灰/催化劑和水泥/催化劑漿糊和砂漿的研究以及對環(huán)境的影響方面。 FCC的特性表明，它是一種硅鋁酸鹽，主要具有非晶態(tài)結構，具有較大的比表面，因此必須進行機械活化（研磨）以獲得火山灰性能的材料。通過熱重法，X射線衍射法，水性介質電導率測量，傅立葉變換紅外光譜，掃描電子顯微鏡，機械強度發(fā)展評價和固井有效性k因子評價來研究反應性。已證明該材料具有很高的火山灰活性，此外該反應性還優(yōu)于其他類似的產(chǎn)品，例如偏高嶺土。已經(jīng)研究了在水泥反應的水合，火山灰和水合催化中形成的產(chǎn)物，并將其反應特性與其他已知的火山灰進行了比較。 FCC與熟石灰之間的反應產(chǎn)物的性質類似于偏高嶺土形成的產(chǎn)物，基本上是硅酸鈣水合物和水合粗晶，它們的形成允許獲得具有較高機械強度的微觀結構。與沒有研磨FCC的同源材料相比，已經(jīng)證明了制備包含水泥/ FCC的機械強度和干燥收縮率提高的材料的可能性。已經(jīng)確定了用于石灰固定最大化的最佳FCC劑量，顯示出與偏高嶺土相似的火山灰性能，但是比其他研究過的火山灰非常好，借助某些化學活化劑以及隨著固化溫度的提高而改善的性能。 ;在水介質中的電導率測量結果已經(jīng)證實，與馬塔高林和硅粉相比，F(xiàn)CC具有良好的火山灰活性。對漿料和灰漿的機械強度研究已經(jīng)證實了該催化劑具有很高的火山灰活性，其k因子值大于1。盡管FCC包含對環(huán)境有潛在有害影響的少數(shù)元素，但已證明這些元素是由礫巖基質固定的，從環(huán)境的角度來看，也提供了足夠的建筑材料。 *最初發(fā)表于 DAI 卷。 63，編號1。此處以正確的作者姓名重新發(fā)布。

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