Journal ArticleDOI
Corrosion resistance of cement mortars containing spent catalyst of fluidized bed cracking (FBCC) as an additive
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In this paper, the chemical corrosion and the mechanical strength were studied in cement mortars containing an additive of FBCC under conditions of long-term action of sodium sulphate solution or saturated brine.Abstract:
The chemical corrosion and the mechanical strength were studied in cement mortars containing an additive of FBCC under conditions of long-term action of sodium sulphate solution or saturated brine. The observations have shown that saturated brine is a more aggressive agent, since it leaches Ca(OH)2 and contributes to the decomposition of the C-S-H phase thus worsening the compressive strength as compared with that of mortars kept in water. The addition of 20% FBCC inhibits the leaching process and counteracts the decrease of compressive strength in mortars kept in brine. On the other hand, sodium sulphate solution changes favourably the mortar microstructure, increases of the content of small pores and improves both the compressive and the flexural strengths, as compared with those of a mortar kept in water.read more
Citations
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Spent catalyst waste management: A review: Part I—Developments in hydroprocessing catalyst waste reduction and use
M. Marafi,Antony Stanislaus +1 more
TL;DR: In this article, information available in the literature on spent hydroprocessing catalyst waste reduction at source by using improved more active and more stable catalysts, regeneration, rejuvenation and reuse of deactivated catalysts in many cycles, and reusing in other processes are reviewed in detail with focus on recent developments.
Journal ArticleDOI
Pozzolanic reaction of a spent fluid catalytic cracking catalyst in FCC-cement mortars
TL;DR: In this paper, the relation between the pozzolanic activity, the hydration heat and the compressive strength developed by blended mortars containing 10 and 35% of a spent fluid catalytic cracking catalyst (FCC) was presented.
Journal ArticleDOI
Potential use of FCC spent catalyst as partial replacement of cement or sand in cement mortars
TL;DR: In this paper, the effect of using FCC spent catalyst, produced from local refineries on the compressive strength of mortars was studied, where the main constituents of mortar; sand and cement were partially replaced by different percentages of spent catalyst.
Journal ArticleDOI
Synthesis, moisture resistance, thermal, chemical and SEM analysis of macro-defect-free (MDF) cements
TL;DR: In this paper, the effects of polymers, Al2O3, OPC and SAFB clinkers in the raw mix and delayed drying on MDF cements and also on their subsequent moisture resistance and thermal stability were analyzed.
Journal ArticleDOI
The hydraulic activity of high calcium fly ASH
TL;DR: In this paper, the reactivity of high-calcium fly ash in mixtures with cements was evaluated using differential thermal analysis and thermogravimetry, together with other methods.
References
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Book
The chemistry of cements
TL;DR: An international symposium on the chemistry of cements, organized by the Royal Swedish Institute for Engineering Research and the Swedish Cement Association, was held in Stockholm on July 6-8 and attended by representatives from Great Britain, Canada, the United States and many of the European countries.
Journal ArticleDOI
Sulphate Resistance of Metakaolin Mortar
Jamal Khatib,S. Wild +1 more
TL;DR: In this article, the partial substitution of cement with metakaolin (MK) is investigated in terms of resistance of MK mortar to sodium sulphate (Na2SO4) solution, and results on strength, porosity, pore size distribution, and calcium hydroxide (CH) contents are also reported.
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Microstructural and microanalytical studies of sulfate attack. IV. Reactions of a slag cement paste with sodium and magnesium sulfate solutions
R.S. Gollop,H.F.W. Taylor +1 more
TL;DR: In this paper, a sample of a blended cement paste that had been stored for 6 months in solutions of Na2SO4 or MgSO4 was examined by scanning electron microscopy using backscattered electron imaging and X-ray microanalysis.
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Reuse of waste catalysts from petrochemical industries for cement substitution
TL;DR: In this article, two types of waste catalysts, equilibrium catalyst (Ecat) and electrostatic precipitator catalyst (EPcat), can be obtained after fluid catalytic cracking.
Journal ArticleDOI
Fluid catalytic cracking catalyst residue (FC3R): An excellent mineral by-product for improving early-strength development of cement mixtures
TL;DR: In this paper, a new industrial byproduct obtained from the fluid catalytic cracking (FCC) process in petrol refinery is studied for construction uses, which is composed of original spherically shape particles and fragments produced in the catalytic process (30-0.1 μm) that present highly irregular morphologies.