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Troubleshooting sulfate imbalance of Portland Cement using

B) The cement tested would need approx. 0.75% to 1.0% sulfate measured as SO3 by weight of cement to reach sulfate optimum according to Lerch. Test Protocol – very early age hydration The following protocol is suitable for testing of the effect of sulfate additions to a cement that is suspected of insufficient supply of soluble sulfate for early aluminate controlGet price

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Microstructure Change of Nanosilica–Cement Composites

2020/05/14The deterioration of cement composites containing nanosilica partially exposed to sulfate attack was studied, and the microstructure change of the composites was analysed by a scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results showed that nanosilica–cement composites had better sulfate resistance compared to plain cement Get price

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COMPARISON OF STRENGTH AND DURABILITY OF

Portland cement with pozzolana additive has a higher activity in comparison with sulfate-resistant Portland cement. Number 19, Year 2019 Page 81-86 Comparison of strength and durability of concretes made with sulfate-resistant Portland cement andGet price

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SULFATE MGO BOARD

Sulfate mgo board is also known as MGSO4 board, magnesium sulfate board or chloride free mgo board which is a light weight non-flammable panel product. Fiber cement panels are non-combustible building materials and offer amazing performance in fireproof, bending strength and impact resistance.Get price

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Evaluation of cement kiln flue dust as a potassium and sulfate

2008/11/11The main objective of this study was to determine the efficacy of cement kiln flue dust as a substitute for potassium sulfate fertilizer. Chemical and X‐ray diffraction analyses revealed that the flue dust contained about 20.7% K of which 9.1% was present as aphthitalite (K 3 Na(SO 4 ) 2 ), 4.4% as sylvite (KCl) and the remaining 7.2% as arcanite (K 2 SO 4 ) .Get price

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COMPARISON OF STRENGTH AND DURABILITY OF

Portland cement with pozzolana additive has a higher activity in comparison with sulfate-resistant Portland cement. Number 19, Year 2019 Page 81-86 Comparison of strength and durability of concretes made with sulfate-resistant Portland cement andGet price

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Mechanism of Sulfate Expansion in Hydrated Portland Cement

1988/11/01Sulfate-resisting portland cement: Reactions with sodium and magnesium sulfate solutions, Cement and Concrete Research, 10.1016/0008-8846(95)00151-2, 25, 7, (1581-1590), (1995). Crossref V Živica, The rate of corrosion of concrete reinforcement and possibilities of its mathematical modelling, Bulletin of Materials Science, 10.1007/BF02747530, 18, 2, (115-124), (1995).Get price

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Effect of alkalis and sulfates on Portland cement systems

2011/02/24The effect of the sulfates and alkalis on the durability of Portland cement systems was investigated through a series of cube and prism mixes. Durability was assessed using expansion of mortar prisms and the compressive strength of mortar cubes. The study covered a large range of both alkali and sulfate contents using 5 different Portland cements. The alkali contents ranged from 0.27 Get price

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Hydration and Properties of Slag Cement Activated by Alkali

2017/09/09The sulfate ions from sulfates would react with Ca 2 + from slag cement and form the reaction product ettringite. However, the addition of sodium hydroxide seems ineffective in activating the slag cement. Successive addition ofGet price

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The Effect of Calcium Formate, Sodium Sulfate, and Cement

2019/04/11CTB samples are mixed with different contents of calcium formate, sodium sulfate, and cement clinker (4%, 8%, and 12% by mass of total binder) and cured in a cubic chamber (at 20 C and RH 90# Specimen tests were performed to assess the slump height, setting time, leaching water rate, vertical settlement, and strength development.Get price

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Effects of Erosion Form and Admixture on Cement Mortar

The effects of the admixtures, erosion age, concentration of sulfate solution, and erosion form of sulfate attack on the mechanical properties of mortar were investigated. Simultaneously, the microstructure, pore characteristics, kinds and morphologies of erosion products of mortar before and after sulfate attacks were performed by Mercury Intrusion Porosimetry (MIP), Environment Scanning Get price

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Sulfate

Sulfate-resistant Portland cement has a brand M400.It is prone to slow hardening and low heat generation. It is universal and can withstand all kinds of temperature conditions and humidity. Sulfate-resistant cement with minerals about 15-20% of the total cement mixture of blast furnace slag in granules or 5-10% of mineral substances is added.Get price

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The Effect of Calcium Formate, Sodium Sulfate, and Cement

2019/04/11CTB samples are mixed with different contents of calcium formate, sodium sulfate, and cement clinker (4%, 8%, and 12% by mass of total binder) and cured in a cubic chamber (at 20 C and RH 90# Specimen tests were performed to assess the slump height, setting time, leaching water rate, vertical settlement, and strength development.Get price

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Mechanism of Sulfate Expansion in Hydrated Portland Cement

1988/11/01Sulfate-resisting portland cement: Reactions with sodium and magnesium sulfate solutions, Cement and Concrete Research, 10.1016/0008-8846(95)00151-2, 25, 7, (1581-1590), (1995). Crossref V Živica, The rate of corrosion of concrete reinforcement and possibilities of its mathematical modelling, Bulletin of Materials Science, 10.1007/BF02747530, 18, 2, (115-124), (1995).Get price

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Sulfate resistance of Portland dolomite cement: performance

2020/09/29This study investigated the sulfate resistance of Portland-dolomite cement (PDC) cured at different temperatures. Mortars of Portland cement (PC) and PDC with different dosages of dolomite, 10, 20, 30% by weight, were cured in water at 20 C and 60 C for 28 days before immersed in 50 g/L Na 2 SO 4 solution at 20 C.Get price

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Effect of alkalis and sulfates on Portland cement systems

2011/02/24The effect of the sulfates and alkalis on the durability of Portland cement systems was investigated through a series of cube and prism mixes. Durability was assessed using expansion of mortar prisms and the compressive strength of mortar cubes. The study covered a large range of both alkali and sulfate contents using 5 different Portland cements. The alkali contents ranged from 0.27 Get price

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Effect of supersulphated cement on sulfate attack of cement

Effect of supersulphated cement on sulfate attack of cement mortar Niu quanlin1, a * zhang rui 2,b 1 schoo l of m ater i nc dngne, Shan un v s yf noog, Z b g 255049, P.R .China 2L ibr ay of s h ndgu v et c nol, Z, S ng 2 5049 P.R .C a Get price

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Pioneer Cement Industries

Sulfate Resisting Cement (SRC) Pioneer Sulfate Resisting Cement is used for construction in areas where alkali soil and groundwater contain high amounts of sulfate. Pioneer Sulfate Resisting Cement conforms to both BS 4027:1996 and ASTM Type –V specification.Get price

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Effect of supersulphated cement on sulfate attack of cement

Effect of supersulphated cement on sulfate attack of cement mortar Niu quanlin1, a * zhang rui 2,b 1 schoo l of m ater i nc dngne, Shan un v s yf noog, Z b g 255049, P.R .China 2L ibr ay of s h ndgu v et c nol, Z, S ng 2 5049 P.R .C a Get price

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