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Effect of sulphate ions in mixing water on cement mortar

Effect of sulphate ions in mixing water on cement mortar

Effect of sulphate ions in mixing water on cement mortar ...

Key Words: Cement Mortar, Mixing water,OPC, PPC, Sulphate ions. I. Introduction Mixing water is very vital for development of concrete and /or mortar. It can also be a source of aggressive ions in the cured concrete/ mortar [1]. In Kenya, there are no legal standards on the quality of mixing water for cement mortar/ concrete.

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EFFECT ON STRENGTH PARAMETERS OF DOUBLE MIXED

Many factors, such as cement type, sulphate cat ion type, sulphate concentration and exposure period, may affect the sulphate resistance and water is an essential ingredient in mortar. However, different permissible limits of sulphate in mixing water for ordinary Portland cement

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Effects of mix composition and water–cement ratio on the ...

Mar 01, 2007  The extent to which concrete is affected by sulfates depends on several factors including its permeability, water to cement (w/c) ratio, type of cement, exposure conditions and the environment . Assuming the same environmental conditions, two factors will tend to control the resistance of a given concrete to sulfate attack: the chemistry of the ...

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Effects of sulfate and magnesium ion on the chloride ...

Apr 20, 2019  The chloride diffusion induced reinforcement corrosion seriously threatens the durability of concrete construction in marine environments. This paper investigates the effects of sulfate and magnesium ion in simulated seawater on the chloride transportation behavior and binding capacity of Portland cement mortar with and without fly ash (FA) and ground blast furnace slag (BFS).

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Effect of Sulphate and Chloride Ingress on Selected ...

The sources of aggressive ions to the mortar/concrete may include deicing salts, seawater, groundwater, bacterial action in sewers, wastewater from industries, use of sulphate or chloride contaminated mix water, and natural gypsum in the aggregate, among others [1, 13–16].

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Effects of foreign substances in cement mortar mixing ...

This study examined the effects of magnesium sulfate and sodium sulfide on fresh and hardened cement mortar. Two 410 kg/m 3 dosed mortars were produced (water/cement ratios of 063 and 072). Sulfate salt solutions were prepared in different concentrations and used as mixing water.

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Effect of Sulphate Attack on Durability of Concrete ...

(a) Use of Sulphate Resistant Cement: To control or resist the sulphate effect on concrete the most effective and efficient method is the use of low calcium aluminate (C 3 A) cement. In general it can be said that 7% C 3 A content is a rough division between cement of good and poor performance in sulphate waters. (b) Quality of Concrete: A well designed, prepared dense and impermeable concrete ...

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Effects of mix composition and water–cement ratio on the ...

Mar 01, 2007  The extent to which concrete is affected by sulfates depends on several factors including its permeability, water to cement (w/c) ratio, type of cement, exposure conditions and the environment . Assuming the same environmental conditions, two factors will tend to control the resistance of a given concrete to sulfate attack: the chemistry of the ...

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i EFFECTS OF SURFACE AND SUBSURFACE MIXING WATER

Mixing water is very vital for development of concrete and /or mortar. It can also be a source of aggressive ions in the cured concrete/ mortar. This study investigated the effect of mixing water on performance of cement mortar made from selected Ordinary Portland cement (OPC) and Portland pozzolana cement (PPC). Test cements were sampled from

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Effects of Magnesium Sulfate and Sodium Sulfide on Fresh ...

substances present in concrete mixing water can cause damage [1,2,3,4]. Specifically, the effects of magnesium sulfate (MgSO 4 ) and sodium sulfide (Na 2 S) have been examined by previous researches.

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Effect of Sulphate Attack on Durability of Concrete ...

(a) Use of Sulphate Resistant Cement: To control or resist the sulphate effect on concrete the most effective and efficient method is the use of low calcium aluminate (C 3 A) cement. In general it can be said that 7% C 3 A content is a rough division between cement of good and poor performance in sulphate waters. (b) Quality of Concrete: A well designed, prepared dense and impermeable concrete ...

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Effect of Nanosilica on the Sulfate Attack Resistivity of ...

Cement Mortar . P.K Hou, Z.H Guo, Q Yu, N Xie, X Cheng and S.P. Shah. University of Jinan, China . ABSTRACT. The effect of nanosilica on the sulfate attack resistivity of cement mortar was investigated through study on the mechanical property evolution and the length change of the cement mortar under 5 wt.% sodium sulfate for 6 months ...

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Algae in Concrete Mixing Water - Concrete Construction

Oct 01, 1997  A broad survey of the effects of inorganic salts on strength of cement paste showed that copper chloride (in an amount chemically equivalent to a 2% calcium-chloride dosage) retarded set so much that no tests could be made at two and three days (Ref. 2). Depending on concentration, the sulfate ion might also lower the concrete's sulfate resistance.

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Effect of aggressive soil on self compacting concrete

allow for a pronounced effect of sulfate attack, higher water contents were employed for concrete and mortar mixes, shown in Tables 3. 2.2 MIXES FEATURES. Concrete mixtures consist of three main SCC mixtures in beside to the control one. A 400 kg ordinary Portland cement content per cubic meter of concrete was employed for all of them.

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Effect of Water Impurities on Concrete Strength ...

Water Impurities and their Effect on Concrete Properties The effect of various properties on the concrete properties are explained below: Effect of Suspended Particles in Water on Concrete Properties If the mixing water contains suspended particles in an amount up to 0.02 percent by weight of total water used in concrete, it will not affect the concrete properties.

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IJCMES: Effects of Water Quality on Strength Properties of ...

Mar 02, 2019  Abstract: This research investigated the effect of different sources of water on the compressive strength of concrete. The waters samples used for the analysis were rain, river and potable water.The chemical compositions of these water qualities and sources were determined, while 18 concrete cubes were produced in the ratio of 1:2:4 using each ...

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The Resistance of New Kind of High-Strength Cement after 5 ...

Dec 16, 2020  The N-mortar and SR-mortar show comparable DME changes, while the PC-mortar is subject to the harmful effect of aggressive sulfate attack. The length changes of mortars during the 28-day BC and 5-year exposure in 5% Na 2 SO 4 and water are illustrated in Figure 3 .

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Effect of Heavy metal and Magnesium Sulfate on Properties ...

The effect of cadmium (Cd) present in mixing water on compressive strength, setting times, soundness and magnesium sulfate attack of high strength cement mortar was experimentally evaluated. Cement mortar specimens were cast using deionised water and cadmium (Cd) spiked deionized water for reference and test specimens as mixing waters respectively.

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Звіти організацій: "West African Portland Cement Company ...

The effect from additives and fineness of zeolitecontaining clinker and quartz-feldspar sand is studied relative to the thickness and setting time of the cement paste and cement mortar strength.It is shown that the types CEM II/A-P 32.5N and CEM II / A-P 42.5N Portland cement can be produced from imported Portland cement clinker and local ...

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Effects Of Sulfates On Strength Of Portland Cement Mortars ...

Jun 19, 2005  In this experimental study, Portland cement mortar specimens were produced by using mixing water including different amounts of magnesium and sodium sulfate. Test specimens were prepared with water cement ratio of 0.6. Totally, nine types of mixing water were prepared with four different amounts of two different salts and tap water.

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Effect of Sulphates on Compressive Strength of Blended ...

Effect of Sulphates on Compressive Strength of Blended Cement Mortar R.Niranjana Reddy1 Dr. Vaishali G.Ghorpade2 ... Deionised water was used for mixing the cement mortar specimens and curing. These properties were compared to ... Sulphate ions in soil, ground water and sea water may cause deterioration of reinforced

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Effect of Sulfates on Cement- and Lime-Stabilized Soils

cement-stabilized soils were immersed in solutions containmg sulfate ions or when cement-stabilized, sulfate-bearing soils were immersed in water. The sulfate attack on the soil-cement was more rapid than that on concrete, and Cordon suggested that the speed of reaction might be associated with the fact that soil-cement was less dense,

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Effect of chloride in mix ingredients on sulphate ...

The sulphate resistance of concretes containing various levels of chloride introduced in the mixing water was assessed by immersion in sodium sulphate and magnesium sulphate solutions. Mortar and concrete cubes were made using ordinary Portland cement (OPC) and sulphate-resisting Portland cement (SRPC) with chloride contents of 0–45%; the ...

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Effects of Magnesium Sulfate and Sodium Sulfide on Fresh ...

substances present in concrete mixing water can cause damage [1,2,3,4]. Specifically, the effects of magnesium sulfate (MgSO 4 ) and sodium sulfide (Na 2 S) have been examined by previous researches.

get price

Algae in Concrete Mixing Water - Concrete Construction

Oct 01, 1997  A broad survey of the effects of inorganic salts on strength of cement paste showed that copper chloride (in an amount chemically equivalent to a 2% calcium-chloride dosage) retarded set so much that no tests could be made at two and three days (Ref. 2). Depending on concentration, the sulfate ion might also lower the concrete's sulfate resistance.

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Influence of Calcium Sulphate on Cement Motor and ...

grades. Calcium sulphate is added in different proportions to cement and its effect is studied at different ages. Keywords: Cement mortar, calcium sulphate (caso 4), strength, soundness. Literature Review Amer Rashed Shalal9 had carried out his work on the effect of sulphate in cement .Sulphates may be found in any of the raw materials of cement.

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Effect of Nanosilica on the Sulfate Attack Resistivity of ...

Cement Mortar . P.K Hou, Z.H Guo, Q Yu, N Xie, X Cheng and S.P. Shah. University of Jinan, China . ABSTRACT. The effect of nanosilica on the sulfate attack resistivity of cement mortar was investigated through study on the mechanical property evolution and the length change of the cement mortar under 5 wt.% sodium sulfate for 6 months ...

get price

Effect of Heavy metal and Magnesium Sulfate on Properties ...

The effect of cadmium (Cd) present in mixing water on compressive strength, setting times, soundness and magnesium sulfate attack of high strength cement mortar was experimentally evaluated. Cement mortar specimens were cast using deionised water and cadmium (Cd) spiked deionized water for reference and test specimens as mixing waters respectively.

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Water and its Impact on Cement Concrete

Jul 26, 2016  Effects of bad quality water on cement concrete. It has been observed that certain common impurities in water affect the quality of mortar on concrete produced, and in spite of the best materials (i.e cement and aggregates e.tc) used in the cement concrete, required results are not obtainable (GharExpert, 2013).

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Effect of heavy metal present in mixing water on ...

The effect of lead (Pb) present in mixing water on compressive strength, setting times, soundness and sodium sulfate attack of high strength cement mortar was experimentally evaluated. Cement mortar specimens were cast using deionised water and lead (Pb) spiked demonized water for reference and test specimens as mixing waters respectively. On comparison with reference specimens, at higher ...

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Sodium Sulphate Effect on Cement Produced with Building ...

May 07, 2015  In this study, the blended cements produced by using the building stone waste were exposed to sulphate solution and the cement properties were examined. Prepared mortar specimens were cured under water for 28 days and then they were exposed to three different proportions of sodium sulphate solution for 125 days. Performances of cements were determined by means of compressive

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IJCMES: Effects of Water Quality on Strength Properties of ...

Mar 02, 2019  Abstract: This research investigated the effect of different sources of water on the compressive strength of concrete. The waters samples used for the analysis were rain, river and potable water.The chemical compositions of these water qualities and sources were determined, while 18 concrete cubes were produced in the ratio of 1:2:4 using each ...

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Effect of hydrogen sulphide emissions on cement mortar ...

cement mortar specimens with a water-cement ratio of 0.55 (PC55) poorest. The other four treatments (PC45, SRC, FMC and PCL), all ... the sulphate ions attack concrete directly by reacting with calcium ions to form ... and water used in the mix design of specimens was 1 to 2 to 0.45. Sulphate resisting cement type 50 ...

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