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2014. effect of curing temperature on setting time strength development and microstructure of alkali activated slag cement. materials research innovations: vol. 18 cmse-2013 pp. s2-829-s2-832.
2001 by slag cement manufacturers and the slag cement association the american concrete institute officially reviewed and changed the terminology from ggbfs to slag cement aci committee 233 2004. the term slag cement will be used throughout this paper when referring to finely-ground granulated blast-furnace slag.
And the desired effects on the concrete helmuth 1987 and aci 232 1996. slag ground granulated blast-furnace slag fig. 3-5 also called slag cement is made from iron blast-furnace slag; it is a nonmetallic hydraulic cement consisting essentially of sili-cates and aluminosilicates of
Blast-furnace slag—produce freshly mixed normal-weight concrete with a density unit weight of 2200 to 2400 kgm. 3 140 to 150 lbft. 3. aggregates of expanded shale clay slate and slag fig. 5-3 are used to produce struc-tural lightweight concrete with a freshly mixed density ranging from about 1350 to 1850 kgm. 3 90 to 120 lbft. 3.
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
Compressive strength of blast furnace slag concrete with different dosage of slag was studied as a partial replacement of cement. from the experimental investigations it has been observed that the optimum replacement of ground granulated blast furnace slag powder to cement without changing much the compressive strength is 15.
Concrete containing cement sand gravel nickel slag water and superplasticizer were processed using normal intensive mixing. the strength of concrete is determined by the interfacial zone between binder paste and aggregates. due to the weathering of natural aggregates with time a morphology with rounded edges is obtained reducing the interlocking with the paste.
Concrete is one of the most important materials in the construction world. in the present scenario due to the various industrialization especially in the urban areas the demand of construction work increases progressively. due to which there is very high demand of concrete. so it is very ...
Concrete is one of the most widely used construction materials for several structures such as buildings homes dams roads and bridges. concrete performance is generally based on the mix design material properties in the mixture curing
Concrete was tested for compressive strength sorptivity resistivity and water penetration under pressure. the volume of paste in all concrete mixes was the same. results showed the effect of slag on concrete transport properties. the effect of limestone filler was minimal either admixed solely or in conjunction with slag.
Concrete with addition of ggbs. ggbs or slag can be present in concrete as a separate material added in the mixer or blended in the portland cement: either as cem ii-s with up to 35 of ggbs of the total binder content or as cem iii also called blast furnace slag cement containing 35 to
Deb p. and nath p. and sarker p. 2014. the effects of ground granulated blast-furnace slag blending with fly ash and activator content on the workability and strength properties of geopolymer concrete cured at ambient temperature. materials and design. 62: pp. 32-39.
Effect of slag cement on the properties of ultrahigh . slag cement has inappreciable effect on the capillary absorption and salt scaling abstract this study investigates the effects of replacing a portion of portland cement with slag cement 0 25 50 and 65 by mass on the properties of plain ultrahigh performance concrete uhpc mixes ...
Effect of slag on pumpability concrete . the effect of ground granulated blast furnace slag slag although the data are limited the restrained shrinkage cracking of concrete containing slag appears to be less than that of concrete without slag cracking was delayed to later ages and resulted in smaller total crack widths the effect of the ...
Effects of fly ash on carbonation of concrete with portland blast-furnace slag cement. in: durability of concrete. second international conference. august 4-9 1991 montreal canada. volume ii. an investigation has been carried out into the effects of cement replacement by fly ash on the carbonation rte of concrete.
Feb 08 2015 effect of slag cement on flexural strength 0 20 40 60 80 100 120 140 728 flexural strength of 28 day opc age days 100 opc 50 opc50 slag cement opc 28 days 830 psi 5.7 mpa aggregate more calcium silicate hydrate wcpa annual concrete pavement workshop bruce blair presentation february 12 2015 26 of 41
Georgia chapter aci luncheon benefits of slag cement in. benefits of slag cement in concrete october 28 2015 . prepared by: slag cement’s effect on concrete typical replacement values effects on compressive strength reducing permeability pc 30 slag. il10 30. slag. set time -minutes compressive strength -psi 1 day. 7 day. 28 day.
In this study the effects of mineral and chemical admixtures on pumpability of high-strength concrete were investigated through measuring rheological properties of concrete and the lubricating layer.
Jan 28 2020 factors that impact pumpability a wide array of factors can impact concrete pumpability bui notes such as the dimension shape gradation and volume of aggregates. supplementary materials like fly ash silica fume slag and limestone also influence the rheology of the mix and therefore its pumpability.
Jul 24th 12:00 am jul 26th 12:00 am. effect of blast furnace slag powder and fly ash on durability of concrete mixed with seawater. according to the report of the united nations it is said that two-third of world population would be influenced by water shortage before 2050.
Lehigh slag cement product description lehigh slag cement conforms to astm c989aashto m 302 standard specifications for slag cement as a constituent in concrete and mortars and csa a3001 cementitious material for use in concrete. slag has cementitious properties similar to portland cement.
Mar 16 2012 shape and size effect on concrete strength. aggregates shape and size has a strong influence on properties of concrete. rough surface textured particles increase the compressive strength of concrete up to 20-30 instead of using natural gravels that is obtained from river beds. rough surface have pores which have ability to form bond or create ...
Mar 21 2016 pumpability of concrete is generally improved with a decrease in the fineness modulus. fine aggregates having a fineness modulus between 2.40 and 3.00 are generally satisfactory provided that the percentages passing the 300- and 150-μm no. 50 and no. 100 sieves meet the previously stated guidelines.
Mixture proportions of concrete. the normal concrete was prepared based on water cement ratio of 0.50 and a cement content of 340kgm 3 to obtain a compressive strength greater than 20nmm 2 at 28 days immersion method of curing. quartzite sand was used with a quantity of 33.33 of total aggregates by weight.
Nov 30 2018 effect of slag cement on the flowability of uhpc mixes the measuring cone has a 100-mm bottom diameter; thus 100-mm spread indicates no spread at all. the air content of uhpc mixes was measured in the fresh state using the unit weight method and characterized in the hardened state using the astm c457 linear traverse method.
Ordinary portland cement opc is the commonly used binder for cpb operations. the effects of the tailings characteristics and opc are extensively studied in the study area. the beneficial effect of the use of alkali-activated slags aass on the mechanical and durability properties of cpb of sulphide-rich tailings has been recently reported.
Ordinary portland cement is one of the main ingredients used for the production of concrete. unfortunately production of cement involves emission of large amounts of carbon-dioxide gas into the atmosphere a major contributor for green house effect and global warming. hence it is inevitable either to search for another material or partially replace it by some other material.
Polyethylene terephthalate pet fiber from waste plastic bottles is an environmentally friendly fiber that can improve the mechanical properties of wet-mix shotcrete. the main objective of this paper is to investigate the effects of pet fiber parameters on pumpability shootability and mechanical properties of wet-mix shotcrete. for this purpose the orthogonal test based on three factors ...
Properties and effects of copper slag in concrete 48 table 2.7 physical properties of coarse aggregates fine aggregates and copper slag table 2.8 chemical analysis of copper slag 3 table 2.9 mix proportions kg m3 and mix ratio and tested at 728 and 56 days of curing in water table 2.10 sizes and types of moulds used for ...
Sep 10 1991 the effect of ggbs on the durability of concrete. this paper reviews the effects of ggbs ground granulated blastfurnace slag on the durability of concrete and the advantages and disadvantages of using ggbs against different forms of attack.
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