Influence of slag on cement hydration

Influence of slag on cement hydration

What is slag cement

Slag cement is a hydraulic cement formed when granulated blast furnace slag GGBFS is ground to suitable fineness and is used to replace a portion of portland cement It is a recovered industrial by product of an iron blast furnace Molten slag diverted from the iron blast furnace is rapidly chilled producing glassy granules that yield

Early Hydration Kinetics of Cementitious Materials Containing IIETA

The results indicate that slag replacement and temperature have a significant influence over the hydration degree of composite cementitious materials [14] Q Wang P Y Yan S Han The influence of steel slag on the hydration of cement during the hydration process of complex binder Science China Technological Sciences vol 54 no

PDF Influence of Nucleation Seeding on the Compressive Strength of

presented here provide more insight into the mechanisms controlling slag hydration The reaction rate of slag cement can be adjusted to match the reaction rate of Portland cement by increasing the surface area of the slag cement [1 10] This can be achieved through grinding which is not economical [11]

Research of Mortar Containing Phosphorous Slag and Calcium Hindawi

It can be observed from Figure 5 a and Table 3 that the weight loss of hydration products and CH content in PS38NC2 is approximately % and % respectively which is higher than that of PS40 This could be due to the accelerating effect of NC on the hydration of cement at early ages It also can be seen in Figure 5 b and Table 3 that the weight loss of hydration products in PS38NC2 is

Effects of slag on cement hydration by electrical resistivity

A good linear relationship between electrical resistivity and compressive strength was shown as fc 3d = P 3d The electrical resistivity method can be used to characterize the influence of slag on the hydration process of cement paste and predict its compressive strength Export citation and abstract BibTeX RIS

Energies Free Full Text Influence of Slag Cement on the

Durability of concrete designed for radiation shielding structures is an important issue in nuclear power plant safety An investigation of the permeability of concrete containing heavyweight aggregates and water bearing aggregates was performed with respect to gaseous and liquid media Mix design was developed using Portland and slag cement crushed magnetite and serpentine aggregate The use

Experimental Study on the Influence of a Cementitious Hindawi

Chen et al studied the influence of slag as cement replacement in various types of fiber reinforced concrete on the chloride penetration resistance of the concrete and found that slag had a positive effect on the chloride penetration resistance of the concrete And which can react with water and cement hydration by products in concrete

Use of activated quartz powder as an alkaline source for producing one

The low content activated QP might lead to a low pH of the pore solution for the slag hydration The dissolution of slag and the precipitation of hydration products are difficult to take place during the initial hydration ages if the pH is too low thereby resulting in a low strength In contrast the 1 day and 28 day strengths of sample OPM60

Influence of steel slag fineness on the hydration of cement steel slag

This study investigated the influence of steel slag s fineness on the hydration of cement steel slag paste The following conclusions can be drawn 1 The hydration activity of steel slag can be effectively improved by increasing its fineness Finer steel slags release more cumulative heat and obtain higher hydration degrees

Hydration Cement Science

The hydration kinetics of slag is generally divided into three stages 1 a nucleation period during which product growth is accelerating 2 a phase boundary controlled stage and 3 a diffusion controlled stage The reaction degree of slag in blended cement is influenced by many factors

PDF Influence of Micronised Biomass Silica on the Workability and Strength

composition When MBS is added in the cement it enhances the rate of cement hydration at early hours due to the release of OH ions and alkalies in to the pore solution MBS is having higher specific surface area than OPC The higher surface area of MBS indicates that the material can achieve higher hydration process

Hydration products of slag in blended cement Cement Science

The main hydration products of the slag cement are C S H gel Ca OH 2 the sulpho aluminate hydrate phases AFt and AFm and a Mg Al rich hydroxide phase Fig 1 Transmission electron micrograph showing foil like Op C S H in a water activated slag paste hydrated for 3 1/2 years at 40°C W/S = by Richardson The nature of C S H in

Effect of steel slag on the hydration and strength development of

In this study effects of steel slag on the hydration and strength development of calcium sulfoaluminate CSA cement were investigated Pastes with 0% 10% 20% and 40% by mass of steel slag replacements for CSA cement were tested for setting time chemical shrinkage electrical resistivity and compressive strength

Sci Hub Influence of slag chemistry on the hydration of alkali

Haha M B Lothenbach B Le Saout G Winnefeld F 2024 Influence of slag chemistry on the hydration of alkali activated blast furnace slag — Part I

Influence of slag chemistry on the hydration of alkali activated blast

article{osti 21596949 title = {Influence of slag chemistry on the hydration of alkali activated blast furnace slag Part II Effect of Al{sub 2}O{sub 3}} author The hydration of a low alkali cement based on CEM III/B blended with 10 wt % of nanosilica has been studied The nanosilica reacted within the first days and 90% of the slag

The influence of steel slag on the hydration of cement during the

The influence of steel slag a by product from the processing of iron to steel on the hydration of cement during the hydration process of complex binder was studied by calorimetry X ray diffraction analysis and Ca OH 2 content determination The results show that steel slag and cement affect each other s hydration by changing the hydration environment

Influence of nano silica and metakaolin on the hydration

This study aims at enhancing the hydration characteristics and microstructure of cement mortar CM containing ground air cooled slag ACS using nano silica NS and nano metakaolin NMK powder Firstly ordinary Portland cement OPC was replaced by 0 5 10 15 and 20 wt % ground ACS CM was designed at 3 1 of sand OPC/ACS ratio

Experimental Investigation on Bond Microstructure and Durability of

The current study aimed to investigate the influence of the expired hardened cement blended with ground granulated blast furnace slag on the bond microstructure and durability of high strength concrete HSC Five concrete mixes are prepared the first mix is taken as a control and the remaining four mixes are used as experimental blends HSC characteristics are evaluated by compressive

Cement hydration Understanding Cement

The Si/Ca ratio is somewhat variable but typically approximately in hydrated Portland cement but up to perhaps about if slag or fly ash or microsilica is present depending on the proportions Calcium hydroxide or Portlandite Ca OH 2 often abbreviated to CH CH is formed mainly from alite hydration

Hydration mechanism and phase assemblage of blended cement with iron

The hydration of Portland cement blended with iron rich sewage sludge ash IRSSA was investigated The addition of IRSSA results in a retarding effect on cement clinker hydration during early ages especially C 3 S while the reaction degree of cement clinker increases at later ages The second peak observed in the deceleration period of heat flow curves in blended systems is due to the

A mathematical model for strength prediction of HPC containing copper

Hence it is interesting to investigate the effect of copper slag as a cement replacement on the strength of HPC In this study three level of water to cement ratios 0 4 and 0 5 were chosen The various concrete mixtures are produced with increasing copper slag contents from 0 to 40 wt % in steps of 10 wt % as cement replacement

slag in concrete Topic American Concrete Institute

The use of slag in concrete has several benefits including reduced energy reduced greenhouse gas emissions and reduced use of raw materials Various types of slag are produced Blast furnace slag—The nonmetallic product consisting essentially of silicates and aluminosilicates of calcium and of other bases that is developed in a molten condition simultaneously with iron in a blast furnace

Influence of mineral admixtures on strength and hydration products of

Puertas et al 2024 studied the strength behaviour and hydration of alkali activated fly ash slag cement under different curing conditions The results indicated that an increased curing temperature has a positive effect on early strength gain and a strength increase up to a fly ash content of 30%

Influence of slag blended cement concrete on chloride diffusion rate

The Department of Energy s Office of Scientific and Technical Information

Influence of wet grinded slag on the hydration of phosphogypsum slag

At the 24 h the hydration heat for WGGBS0 was J/g and was increased to J/g J/g and J/g by using of 20 % 40 % and 60 % WGGBS replacing the GGBS This was manifested that the use of WGGBS could significantly enhance the hydration heat of PSBC The similar situation was also observed at the 48 h and 72 h

Influence of Copper Slag on Mechanical Performance Hydrate Assemblage

Abstract Copper slag CS is a by product generated during the process of copper metal smelting The influence of CS on the mechanical performance hydrate assemblage and mechanism of the cementitious system was investigated by multiple methodologies to accelerate the sustainable development of the copper industries

Laboratory Preparation and Performance Characterization of Steel Slag

The hydration properties of SSUP were studied by means of cement paste hydration heat and mortar strength Meanwhile the soundness of SSUP and SSP was compared by the Le chatelier soundness test The process of preparing SSUP in the laboratory is as follows the steel slag is ground by a horizontal ball mill for 50 min and then ground with a

The Influence of Slag on the Hydration of Cement

aluminate phase there is a filler effect using inert filler at about 12 hours of hydration which shows slag can also has filler effect in the early hydration period Transformation of AFt to AFm causes cumulative heat shoulder at about 60 hours For all systems slags did not have a strong influence on hydration of C3A phases

PDF Influence of slag composition on the hydration of alkali

This is due to the formation of a dense hydration product in the NaOH activated system at the early age which leads to a more porous microstructure than in the case of sodium metasilicate

Influence of limestone on the hydration of ternary slag cements

The impact of calcium carbonate on the hydration of ternary slag limestone cement is the focus of the present study A multi technique approach was applied to study hydration A PONKCS phase for GGBS was introduced in the Rietveld refinement of X ray diffraction data XRD obtained from freshly ground samples without hydration stopping

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