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The grout mixes of the present study contain cement, ultra-fine slag (UFS), s. Properties of Concrete Modified with Ultra-Fine Slag. dioxide so as to be eco-friendly. This paper presents the effect of ultra-fine slag (i.e. 25% of alccofine) as a replacement of cement for different wa.
this paper one of the mineral admixture ultra fine slag (alccofine) is used as a partial replacement of cement. Due to its appropriate size and shape this mineral admixture can be used comfortably even under low water cement ratio. In this paper cement is partially replaced by …
Apr 26, 1993· Ultrafine cements are particulate, cementitious grouting materials that were initially developed as a replacement for unacceptably toxic chemical grouts for Civil Engineering applications. Several basic types are available: ultrafine slag cement (Ml), ultrafine portland cement (M3) and ultrafine portland/slag (M5).
The present study deals with the development of metakaolin-based geopolymer concrete (GPC) and thereafter studying the effects of adding ultra-fine slag on its mechanical and permeability characteristics. The mechanical characteristics including compressive, split tensile, flexural strengths and elastic modulus were studied. In addition, permeability characteristics including water absorption
Compared to other supplementary cementitious materials, it has been seen that ultra-fine slag has composition closer to that of OPC. Unlike other micro fine materials, ultrafine slag has the major two components (CaO, SiO 2). This enables the latent hydraulic properties in these materials. This can be represented as below:
Cement Vertical Mill; Ultra Fine Grinding Mill Portland pozzolana cement, portland slag cement, and portland fly ash cement are all made by adding active admixture and an appropriate amount of gypsum based on Portland cement clinker. They are similar in nature and scope of application, so they can be used interchangeably in most cases.
Nov 07, 2017· LOESCHE Method for Manufacturing Ultra-Fine Blast Furnace Slag 1. LOESCHE METHOD FOR MANUFACTURING ULTRA-FINE BLAST FURNACE SLAG Dr. Holger Wulfert, Dr. Winfried Ruhkamp, Andre Bätz, Paul Erwerth Material Tests: Prof. Ludwig, Bauhaus University, Weimar, FIB Blast furnace slag grain with reaction seam of CSH phases (taken by B. Möser, Bauhaus …
ultra fine slag acts as filler thus also reduces permeability. In this paper mechanical strength development of high strength concrete (M50) with partial replacement of cement by ultra fine slag (alccofine) is carried out. Comparison is done between cubical strength and cylindrical strength of M50 grade concrete using ultra fine slag. Key words
Apr 22, 2017· The purpose of the study is to obtain a cement grout with improved performance. The grout mixes of the present study contain cement, ultra-fine slag (UFS), super plasticizer and water. Properties like flowability, bleeding, compressive strength and shrinkage of cement grouts have been studied. Rheological parameters were also studied in order to explain the grout workability.
Cement was replaced with ultra fine slag in different percentages of 5, 10, and 15% to study the compressive strength, porosity, resistances against sulfate attack, sorptivity and chloride ion penetration. The experiments to study compressive strength were conducted for different ages of concrete such as 7, 28, 56, and 90 days.
The purpose of the study is to obtain a cement grout with improved performance. The grout mixes of the present study contain cement, ultra-fine slag (UFS), super plasticizer and water. Properties like flowability, bleeding, compressive strength and shrinkage of cement grouts have been studied.
Keywords: ultra fine slag, durability, chloride penetration, corrosion, rapid chloride migration test Abstract. Improving the durability of concrete to sustain a longer life span and producing a greener concrete are becoming important criteria in obtaining quality concrete. Incorporating Ground Granulated Blast-furnace Slag (GGBS) as a mineral
Mar 01, 1994· Blended ultra-fine cement composed of fine high deteriorated structure to alkalinize the parts neutral- early strength cement and ultra-fine blast furnace slag ized by carbonation or chlorination, deteriorated parts and gypsum meeting the abovementioned require- are removed, these parts are filled with fresh mortar, ments has recently been developed and used as the and the surface is covered and …
Apr 03, 2019· 32. 14th global slag conference, Aachen, Germany 27.03.201932 Application of Ultra-Fine GGBFS Blast furnace slag cements reduce CO2 emissions during cement production. Slag cements with high blast furnace slag content are currently used only in ready- mixed concrete sector.
Jan 08, 1991· Thus fine particle size Portland cement, as hereinafter defined, hardens more rapidly in low temperature environments in the range of from about 30° F. to about 100° F. than does fine particle size slag cement, also as hereinafter defined. Also Portland cement hardens more rapidly at elevated temperatures than does slag cement.
ultra-fine ground granulated blast furnace slag with average grain size equal to 4.5 μm were obtained using modern grinding equipment such as centrifugal-elliptical mill and centrifugal dynamic classifier. Water-reducing effects of superplasticizer in Portland cement-slag compositions depending on types, quantity and fineness of slags
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 powder.Ground-granulated blast furnace slag is highly cementitious and high in CSH (calcium silicate hydrates) which is a strength enhancing
This rapid cooling, called quenching, creates glassy granules, which are then ground into the fine powder known as slag cement. Slag cement is as old as iron-making itself. In the 1700s, it was combined with lime to make mortar. One of the first major uses of slag-lime cements was construction of the Paris underground in the late 1800s.
Aug 10, 2015· Cement was replaced with ultra fine slag in different percentages of 5, 10, and 15% to study the compressive strength, porosity, resistances against sulfate attack, sorptivity and chloride ion penetration. The experiments to study compressive strength were conducted for different ages of concrete such as 7, 28, 56, and 90 days.
May 20, 2020· The effects of ultra-fine slag (UFS) and silica fume (SF) on the compressive strength and durability-related properties of high-strength concrete were compared, and the mechanism of these effects was analysed. Portland cement was replaced with UFS or SF in amounts of 10% and 15% by mass in cement with a water/binder ratio of 0·25.
This paper presents the effect of ultra-fine slag (i.e. 25% of alccofine) as a replacement of cement for different water to binder ratios (i.e. 0.38, 0.4 and 0.45). The effect of alccofine on the
Considering such ultra-fine BFS, the geometrical simulation for packing fraction of particles suggested that the packing fraction of whole high volume blast furnace slag cement would be increased. At the W/P ratio of 0.16, the apparent viscosity of high volume blast furnace slag cement paste including ultra-fine BFS and the viscosity of paste
furnace slag. Ultra-ﬁ ne blast furnace slag could reduce one of the main weaknesses of cements containing blast furnace slag, that being too little early strength for many applications (Diagram 1). As is already apparent today, the ultra-ﬁ ne blast furnace slag could be …
Set retarded ultra fine cement compositions which remain pumpable for a predictable period of time at temperatures up to about 240° F. are provided. The compositions are basically comprised of an ultra fine hydraulic cement, sufficient water to form a pumpable slurry and a set retarder comprised of a methylenephosphonic acid derivative.
The grout mixes of the present study contain cement, ultra-fine slag (UFS), super plasticizer and water. Properties like flowability, bleeding, compressive strength and shrinkage of cement grouts have been studied. Rheological parameters were also studied in order to explain the grout workability.
In the present work commercially available ultra fine slag (readymade ultrafine slag - RUFS) with an average size of 5 µm was used as mineral admixture in three different percentages of 30, 40 and 50 as substitute to cement. Results of present work were compared to precursor slag of author’s earlier works.