discoloration of concrete with slag



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The coloration phenomenon associated with slag blended

From the investigation it has been revealed that slag concrete of cement slag mix ratio 70 30 has better resistance against strength deterioration for all curing conditions and curing ag...

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Influence of composition and surface discoloration of

The Cu_slag specimen was composed of copper slag as an aggregate In the FA specimen a part of the mixed sand was replaced by fly ash The water/cement ratio W/C was fixed at 55 for all specimen The specimen had a thin slit as an artificial defect thickness and width of...

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Concrete degradation

Concrete degradation may have various causConcrete can be damaged by fire aggregate expansion sea water effects bacterial corrosion calcium leaching physical damage and chemical damage from carbonatation chlorides sulfates and non-distilled water This process adversely affects concrete exposed to these damaging stimuli...

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Usage of steel slag in GPC offers strength

Steel Slag is an additional element Commonly used in special concrete to enhance the mechanical property so it necessary to check the Aspect ratio as well as the shape and size of slag used in...

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Item 421 Hydraulic Cement Concrete

Furnish Slag Cement conforming to DMS-4620 Slag Cement impurities that may cause staining or discoloration when using white hydraulic cement 26 Aggregate 261 Coarse Aggregate Provide coarse aggregate consisting of durable particles of gravel crushed blast...

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Discolored Concrete 3 Causes and What You Can Do

Also there are cement replacements such as slag which are entirely different from traditional concrete When water is added the right mixture between water and air needs to be made Different levels of any of these components can result in varying degrees of discoloration once the mix dries up...

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MSDS Slag Material Safety Data Sheet

Keep bulk slag and cement dry until used When slag is kept wet for long periods of time the leachate may be discolored and have a sulfurous odor When this liquid is exposed to oxygen elemental sulfur may precipitate out leaving a solution of calcium thiosulfate Engulfment hazard...

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Peter Fell

on concrete containing ground slag as a cementitious mateƱl This will disappearwith generally within a one year period Concrete containing slag cement does however have a generally lighter color The discoloration ofconcrete cast in forms or In slabs on grade IS usually the result of a change in either the...

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Ferrous Slag

Jun 10 2008 0183 32 Application of blast furnace slag in concrete pavement is possible according to the same principles mentioned in Section 43 The slag can be used as an aggregate in various types of concrete structures associated with road construction pavements precast and prestressed units foundations curbs and gutters 53...

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Cleaning Concrete Discolored From Blast

Sep 01 1994 0183 32 Cleaning Concrete Discolored From Blast-Furnace Slag By Concrete Construction Staff Question We heard that the greenish blue discoloration often found on concrete containing slag can be removed with a 3 hydrogen peroxide solution Our experience suggests that this treatment may lead to scaling of early-age concrete...

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Slag Cement Association

Slag cement is a recovered byproduct of the iron manufacturing process and can be used to replace a portion of portland cement in concrete mix design The use of slag cement has demonstrated long-term performance enhancements allowing designers to reduce the environmental footprint of concrete while ensuring improved performance and increased...

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The brown discoloration potetial of cements Request PDF

The brown discoloration is an undesirable phenomenon occurring on concrete products The occurrence of brown discoloration depends on the combination of...

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Slab Surface Prevention Repair

Staining discolored concrete with a chemical stain is another way to make color variations less noticeable Usually darker col- 50 for slag and 10 for silica fume Wet sloppy low-strength concrete with low Figure 11 A typical location for a spall is along a joint usually the result of...

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discoloration of concrete in india

Concrete containing ground slag does however have a generally lighter color The discoloration of concrete cast in forms or in slabs on grade is usually the result of a change in either the concrete composition or a concrete construction practice Concrete Discoloration Drying Different Colors or Spotty COMMON CAUSES OF DISCOLORED...

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Types and Causes of Concrete Deterioration

Concrete can deteriorate for a variety of reasons and concrete damage is often the result of a combination of factors The following summary discusses potential causes of concrete deterioration and the factors that influence them CORROSION OF EMBEDDED METALS Fig 1 Corrosion of reinforcing steel is the most common cause of concrete...

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Concrete Discoloration Drying Different Colors or Spotty

Generally a slag-cement mix will be lighter than a straight-cement concrete Adding calcium chloride A frequent reason behind a darkened-concrete appearance is the addition of calcium chloride to accelerate the setting time of concrete see Photo 1 especially when calcium chloride dosages approach 2 by weight of cement...

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Concrete Discoloration

Jan 13 2014 0183 32 Adding supplemental cementitious materials in concrete like fly ash blast-furnace slag and silica fume will produce a different color compared to a straight-cement concrete Concrete Paste Discoloration When the concrete is polished tiny layers of the top of the surface are removed...

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concrete discoloration

If the calcium chloride is not mixed thoroughly in the concrete it can lead to discoloration There are also other complicated chemical reactions that can happen with the Portland cement and other additives fly ash slag etc that might be in the concrete...

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What causes cracking in concrete What you can do to

Nov 12 2018 0183 32 These measures include the use of appropriate pozzolans slag cement or lithium-based admixtur In cold weather regions concrete that will be exposed to the elements should be air-entrained with an adequate air-void system The use of materials with dissimilar thermal coefficients of expansion and contraction should also be avoided...

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concrete greening

Hardened concrete containing slag cement may show mottled green or bluegreen areas on the surface in the first few days after placement This temporary condition is commonly called greening What Causes Greening The blue-green color is attributed to a complex reaction of sulfide sulphur in slag cement with other compounds in portland cement...

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Why Does Concrete Change Color Causes Solutions

The most common discoloration we tend to see in concrete are streaks or blotch These can be darker or lighter than the overall concrete color More extreme color changes in concrete such as blue green or yellow are the result of a more environmentally friendly concrete mixture being used called slag...

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Ground granulated blast

Ground-granulated blast-furnace slag GGBS or GGBFS is obtained by quenching molten iron slag a by-product of iron and steel-making from a blast furnace in water or steam to produce a glassy granular product that is then dried and ground into a fine powderGround-granulated blast furnace slag is highly cementitious and high in CSH calcium silicate hydrates which is a strength enhancing...

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Effects of concrete properties and nutrients on fungal

Apr 01 2009 0183 32 1 Introduction The fouling of concrete and stone surfaces by microorganisms can have deleterious effects on structural integrity and aesthetic appeal Gaylarde and Morton 1999 Dubosc et al 2001 The deteriogenic biofilms inhabiting these surfaces can expedite the destruction of historic structures resulting in the loss of national symbols of cultural heritage Warscheid and Braams 2000...

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Concrete Discoloration

Jan 13 2014 0183 32 Adding supplemental cementitious materials in concrete like fly ash blast-furnace slag and silica fume will produce a different color compared to a straight-cement concrete Concrete Paste Discoloration When the concrete is polished...

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Problem Clinic Why Does Concrete Discolor Concrete

Jul 24 2008 0183 32 Often discoloration changes with time as the cement continues to hydrate and the slab dri Changes in ambient humidity can result in changes in the mottled slab appearance Porous aggregate near the surface can absorb moisture and darken the surrounding paste...

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The Disadvantages of Fly Ash in Concrete Hunker

Fly ash is a byproduct from coal-fired power plants that is frequently used as an admixture in concrete to replace a portion of the Portland cement Using fly ash in concrete is environmentally beneficial because it reduces the Portland cement a major contributor of CO2 required in concrete...

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Slag In Concrete

The Concrete Quality Control Lab Coordinator is requesting to include ground granulated blast furnace slag slag/ggbfs in the concrete mix From past project concrete mix submittals I observe that when slag is used fly ash is not and vice-versa...

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Concrete Discoloration Blue

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Stains on Concrete types sources of stains on concrete

Stains colors or discoloration on concrete surfaces this article provides a catalog of types of stains found on concrete surfaces walls floors ceilings including un-wanted stains from various causes deliberate concrete coloring processes stains or acid treatments Methos for removing un-wanted discoloration or stains from concrete...

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Properties of Hardened Concrete with Blast Furnace Slag

Color of concrete incorporating slag Due to light color of blast furnace slag color of slag concrete is lighter in comparison with conventional concrete Moreover deep blue-green color shown by interior part of slag concrete and can be noticed from slag concrete broken parts for...

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