They include portland cement as covered by aashto m85 2, portland blast furnace slag cement blended cement type is, and slag cement slag cement type s as per aashto m240. Durability of portland blast furnace slag cement concrete durability of portland blast furnace slag cement concrete osborne, g. Portland blastfurnace slag cement definition of portland. What is the difference between opc cement and portland.
Portland blast furnace slag cement definition is a cement produced by intimately intergrinding a mixture of portland cement clinker and granulated blast furnace slag in widely varying proportions. Modified portland cement portlandpozzolan cement, pozzolan. In blast furnace cement, the slag as obtained from blast furnace is used. Environmental impact analysis of blast furnace slag applied. Portland cement blast furnace slag blends in oilwell.
Ecological concrete based on blastfurnace cement with. Comparisons of the compressive strength between adiabatic, semitemperature matched and ambient cured concrete have been made. Ggbs is an industrial pozzolan, different from natural pozzolans like pfa and silica fume. On its own, ground granulated blast furnace slag ggbs hardens very slowly and, for use in concrete, it needs to be activated by combining it with portland cement. Pdf hydration of portland cement blended with blast.
Nonportland cement activation of blast furnace slag. Ground granulated blast furnace slag cement ggbfs is a fine glassy granules which contain cementatious properties. The blast furnace is a huge, steel stack lined with refractory brick, where iron ore, coke and limestone are dumped into the top, and preheated air is blown into the bottom. It differs from ordinary portland cement by a slower increase in strength in the initial hardening period and an increased water resistance. Durability of portland blastfurnace slag cement concrete durability of portland blastfurnace slag cement concrete osborne, g. Pozzolan cement, sulfate resistant cement, silica fume cement, performance cement, blended hydraulic cement, and portland fly ash blended cement. Slag cement can therefore be substituted for opc in a wide range of equal mass replacement ratios. Zhou and others published hydration of portland cement blended with blast furnace slag at early stage find, read and cite all the research you need on researchgate. Blast furnance slag user guideline portland cement. The hydration of ordinary portland cement opc blended with blastfurnace slag bfs is a complex process since both materials have their own reactions which are, however, influenced by each other. Comparison of normal and highstrength concrete in which cement has been partially supplemented by. It is a mixture of portland cement and ground granulated slag obtained during the production of pig iron using a blast furnace. How a blast furnace works introduction the purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called hot metal. Some of the raw materials used to manufacture cement are limestone, shells, and chalk or.
Cement, ground granulated blast furnace slag, and blended cement specifications and testing aashto astm test t 106 c 109 test method for compressive strength of hydraulic cement mortar t 107 c 151 test method for autoclave expansion of portland cement t 7 c 185 test method for air content of hydraulic cement mortar. Portland blastfurnace slag cement is a mixture of ordinary portland cement and not more than 65 wt. The chemical composition of ggbs is almost similar to opc. A hydraulic cement produced by milling 2080 parts by weight of portland cement clinker ts 3441 together with a corresponding amount 8020 parts of blast furnace slag and a quantity of gypsum. Blast furnace slag, fly ash, and ceramic powder are used in the.
Foundation by using slagcrete portland blast furnace cement pbfc a dissertation submitted by kong mun kai in fulfilment of the requirements of course eng4111 and 4112 research project towards the degree of bachelor of engineering civil engineering submitted. In fine particle form, slag cement displays cementitious qualities similar to those of ordinary portland cement opc. We comply european standard en 19712000 for slag cement. Cements, blastfurnace cement, portland cement, composition, strength of materials, physical properties of materials, chemical properties, marking, cement and concrete technology ics 91. The low cost of production of portland blast furnace slag cement makes it cheaper than portland cement.
For the partial replacement of portland cement is used ckd, fly ash and blast furnace slag. Effects of different mineral admixtures on the properties. Portland blast furnace cement simply called slag cement refers to the hydraulic binding material ground by mixing portland cement clinker, granular blast furnace slag, and appropriate amount of gypsum, codenamed p s. Lime and silica make up approximately 85 percent of the mass 1. The charachterization and the utilization of cement kiln dust. A blended cement consisting of an intimately interground mixture of portland cement clink er and granulated blastfurnace slag or an inti mate and uniform blend of portland cement and fine granulated blastfurnace slag in which the amount of the slag constituent is.
Blast furnace slag cement manufacture, properties and uses. Mixtures of portland cement and blast furnace slag, while having a long history of use in the construction industry, have not been used extensively in oilwell cementing applications. The term portland in portland cement originated in 1824 when an english mason. Characteristics of portland blastfurnace slag cement. Recent investigations of blast furnace slag cementing technologies have been expanded to include portland cementblast furnace slag blends. Foundation by using slagcrete portland blastfurnace cement pbfc a dissertation submitted by kong mun kai in fulfilment of the requirements of course eng4111 and 4112 research project towards the degree of bachelor of engineering civil engineering submitted. Various grades of portland blast furnace slag cement pbfc and normal portland cement opc concrete have been cured under adiabatic and semitemperature matched curing conditions. It is generally recognized that the rate of hardening of slag cement is somewhat slower than that of ordinary portland cement during the first 28 days but thereafter increases so that at 12 months the strengths become close to or even exceed those of. Types of portland cement portland cement is a closely controlled chemical combination of calcium, silicon, aluminum, iron and small amounts of other compounds, to which gypsum is added in the final grinding process to regulate the setting time of the concrete. The paper gives an account of the results collected through a wide laboratory and industrial investigation carried out in order to show in which way the compressive strength and the heat of hydration are controlled by a large number of manufacture parameters, such as glass content of the slag, grinding fineness, and gypsum amount of the blended cement. A primary reaction which involves the hydration of ordinary portland cement with water giving calcium silicate hydrate with certain alkalis like calcium hydroxide, sodium hydroxide and potassium hydroxide as shown in the below equation.
Control of early thermal cracking of raft foundation by. Blastfurnace cement definition of blastfurnace cement by. Groundgranulated blast furnace slag is highly cementitious and high in csh calcium silicate hydrates which is a strength enhancing. Compressive strength of portland blast furnace slag cement. Another strategy to limit the amount of portland cement used in concrete is to add gypsum caso 4 2h 2o or anhydrite caso 4 to make supersulfated cement. It was determined that concrete containing 30% and 50% replacement of ordinary portland cement opc with grade 120 slag cement had a decreased initial compressive and tensile strength compared to opc. The use of cem iii cement, beside its ecological effects, provides increased durability of concrete. Blastfurnace cement definition and meaning collins english. En 19712000 specification tiger cement is the leading exporter and supplier of european standard en 19712000 slag cement from pakistan. The secondary reaction involves the alkalis is reacted with the ground granulated blast furnace slag. Show full abstract cement equivalent to blast furnace cement type a consisting of a blend of ordinary portland cement and blast furnace cement type b and was found to produce desirable. The present paper is focused on the determination of the degree of hydration of blended binding systems based on portland cement. From the abovementioned test results, autogenous shrinkage of the portland blast furnace slag cement concrete with blast furnace slag of 20% content and so 3 3. There are two grades, which are identified as cc 32.
May 11, 2010 the hydration of ordinary portland cement opc blended with blast furnace slag bfs is a complex process since both materials have their own reactions which are, however, influenced by each other. Portland blastfurnace slag cement a cement produced by grinding portland cement clinker together with pellets of blastfurnace slag 3060 percent of the total weight and. Durability of portland blastfurnace slag cement concrete. Manufacture of portland cement materials and process. Portland blastfurnace slag cement definition is a cement produced by intimately intergrinding a mixture of portland cement clinker and granulated blastfurnace slag in widely varying proportions. Types of portland cement portland cement is a closely controlled chemical combination of calcium, silicon. Ckd is taken from the cyclone of the exhausted kiln gases. Environmental impact analysis of blast furnace slag. A portland cement mixed with a designated amount of ground granulated blastfurnace slag. Osborne 117 turnpike drive, luton lu33rb, uk received 30 march 1998. Portland blastfurnace slag cement a cement produced by grinding portland cement clinker together with pellets of blastfurnace slag 3060 percent of the total weight and a small amount of gypsum. Blast furnace cement an overview sciencedirect topics. Fe2o3 c4af 58 aluminoferrite tricalcium aluminate 3 cao. Blast furnace slag cement is the mixture of ordinary portland cement and fine granulated blast furnace slag obtained as a by product in the manufacture of steel with percent under 70% to that of cement.
This product consists of finely ground cement clinker mixed with a small amount of calcium sulfate, blast furnace slag, or silica fume. The use of ggbfs in portland cement is governed by aashto m302. Properties of fresh concrete with ground granulated blast. Slag cement, has been incorporated into concrete projects for over a century to improve durability and reduce life cycle costs. Compound composition of clinker cement four major compounds formed from the oxides under high temperature in the kiln name oxide notation shorthand tricalcium silicate 3 cao. Opc ordinary portland cementis the basic type of cement with around 95% of clinker and 5% being gypsum which is added as an additive to regulate setting time of cement. Portland blast furnace slag cement its specifications and effect to reduce co 2 emissions pbfsc is a kind of blended cement. It is for this reason that in recent years, the sales of portland blast furnace slag cement have increased. Properties significant chemoresistance, and suppression of alkaliaggregate reaction type b and c.
Effects of ground granulated blast furnace slag in. The clinkers of cement are ground with about 60 to 65 per cent of slag. Cement scancem materials products for engineered concrete. Because the root blast furnace slag material would otherwise be discarded after separation from molten iron, the u. The latent hydraulic property of the blastfurnace slag gives excellent longterm strength. Manufacturing of cement involves various raw materials and processes.
The latent hydraulic property of the blast furnace slag gives excellent longterm strength. Effects of ground granulated blast furnace slag in portland cement concrete. Portland blast furnace slag cement is a mixture of ordinary portland cement and not more than 65 wt. Iron ore, coke and limestone are fed into the furnace and the resulting molten slag floats. However the autogenous shrinkage of the portlamd blast furnace slag cement. Each process is explained chemical reactions for manufacture of portland cement. The charachterization and the utilization of cement kiln.
European standard en 19712000 specification for slag cement. Because the root blastfurnace slag material would otherwise be discarded after separation from molten iron, the u. Ggbs is a hydraulic cement formed from iron production and has high glassy content for reaction with opc. A blended cement consisting of an intimately interground mixture of portland cement clink er and granulated blast furnace slag or an inti mate and uniform blend of portland cement and fine granulated blast furnace slag in which the amount of the slag constituent is within specified limits. Blastfurnace cement definition of blastfurnace cement. Groundgranulated blastfurnace slag ggbs or ggbfs is obtained by quenching molten iron slag a byproduct of iron and steelmaking from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder. Manufacture and characteristics of portland blast furnace. Cements, blast furnace cement, portland cement, composition, strength of materials, physical properties of materials, chemical properties, marking, cement and concrete technology ics 91. The performance of an experimental portland blast furnace slag cement containing more magnesia than permitted by the specifications, made with a highmagnesia 9. What is the difference between opc cement and portland slag. Among its measurable benefits in concrete are better workability and finish ability, higher compressive aggressive chemicals.
Effect of ground granulated blast furnace slag as partial. Cement is a greenish grey colored powder, made of calcined mixtures of clay and limestone. Portland blastfurnace slag cement article about portland. Laboratory tests of samples of portland blastfurnace slag cements, and of the blastfurnace slags and portland cement clinkers used in their manufacture, obtained from. The slag is a waste product in the manufacturing process of pigiron and it contains the basic elements of cement, namely, alumina, lime and silica. Portland ce ment concrete canada building materials. The ground granulated blast furnace slag is a byproduct of iron manufacturing industry. Cd for portland cement, portlandpozzolan cement and portland keywords. Laboratory tests of portland blastfurnace slag cements. Groundgranulated blast furnace slag ggbs or ggbfs is obtained by quenching molten iron slag a byproduct of iron and steelmaking from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder. Laboratory tests of portland blastfurnace slag cements authors. Effects of ground granulated blast furnace slag in portland. The mixed amount of granular blast furnace slag in cement is 20% 70% by weight.
A typical combination is 50% ggbs with 50% portland cement, 4but percentages of ggbs anywhere between 20 and 80 % are commonly used. Table 1 shows the jis specifications of blended cements. Pdf hydration of portland cement blended with blast furnace. A portland cement mixed with a designated amount of ground granulated blast furnace slag. Specifications for portland blast furnace slag cements do not insure that they will have moderate sulfate resistance, as required of type ii portland cements. Jul 11, 2016 opc ordinary portland cement is the basic type of cement with around 95% of clinker and 5% being gypsum which is added as an additive to regulate setting time of cement. Study of the hydration of portland cement blended with. Portland blast furnace slag cement tiger cement is the leading exporter and supplier of slag cement from pakistan. The manufacture of portland blast furnace slag cement requires 75% less energy than that needed for the production of the portland cement. Control of early thermal cracking of raft foundation by using.