Fibrereinforced geopolymer concrete an innovative material. Mix design for hybrid fibre reinforced geopolymer concrete hfrgpc hybrid fibre reinforced geopolymer concrete hfrgpc was obtained by adding optimum steel polypropylene fibre in different proportions of steel fibre as 1040%, to on to gpc. Five mix proportions of fly ash and silica fume are varied to study the effect of fly ashsilica fume ratios fasf. Fibre reinforced concrete what you need to know before you. Durability characteristics of steel fibre reinforced. A total of 15 specimens were tested for determining each. Geopolymer concrete pvafrgc and steel fibre reinforced geopolymer concrete sfrgc materials have been used as strengthening materials for the protection of the steel bars of the new layer, and subsequent improvement of the flexural strength of existing beams. Fibrereinforced geopolymer concrete an innovative material for tunnel segments, in proceedings 15th australasian tunnelling conference 2014, pp 345352 the australasian institute of mining and metallurgy. This experimental series focus mainly on flexural strength. Geopolymer is a geo friendly material alternative to ordinary portland cement. Study on the geopolymer concrete properties reinforced with.
At that time, it was considered to be one of the worlds most modern and straightforward handbooks on the design of steel fibre reinforced concrete structures. However, using up to 2 vol% spiral steel and pp fibers, it was shown that the elastic modulus of steel fiber reinforced geopolymer concrete can be reduced or increased by a range of. Fracture mechanics of concrete and concrete structures high performance, fiber reinforced conc rete, special loadings and structural applications b. In this study, three types of s are considered namely steel and two tfibre ypes of polyvinyl alcohol pva fibres having different diameters, lengths and elastic modulus. Shear tests were conducted on five series of 250 mm deep by 120 mm wide beams spanning 2250. Some types of fibres produce greater impact, abrasion and shatter resistance in concrete. A number of authors have examined the mechanical and durability properties of fibre reinforced geopolymer concrete, but to date most of the published work focuses on fibre reinforced geopolymer concrete cured under elevated temperatures, which again limits the application of this material to precast elements. In fact, the geopolymer concrete internally reinforced with steel bars has been successfully utilised in the construction of several civil infrastructures such as pavement, retaining walls, and bridges. Properties and applications offiber reinforced concrete 51 high aspect ratio were found to have improved effectiveness. Engineering properties of steel fibre reinforced geopolymer. Geopolymer concrete is proven to have excellent engineering properties with a reduced carbon footprint.
Experimental studies on punching shear and impact resistance of steel fibre reinforced slag based geopolymer concrete. In the current study, a novel plain and steel fibre reinforced geopolymer concrete sfrgc, containing various types of commercial silica fume sf densified, undensified and slurry silica fume. Bond behaviour of reinforcing bars embedded in steel fibre. An investigation of the shear behaviour of steel fibre reinforced geopolymer concrete beams is presented. Pdf on aug 14, 2019, meor ahmad faris and others published pullout strength of hooked steel fiber reinforced geopolymer concrete find, read and cite all the research you need on researchgate. Hybrid fibre reinforced geopolymer concrete beam under. Properties of hybrid fibre reinforced geopolymer concrete. In this research, class f fly ash and a mixture of alkaline activators and different amount of hooked steel fiber were used for preparing geopolymer concrete. The compressive strength of geopolymer concrete is about 1. Material properties of fibers are often more dominant in altering the performance of a fiber reinforced geopolymer composite than binders. The study analyses the impact of steel fibres on the mechanical properties such as density, compressive strength, split tensile strength and flexural strength of. The swedish concrete association published a report on steel fibre reinforced concrete in 1995.
Flexural capacity and behaviour of geopolymer concrete beams. The geopolymer is consisted of fly ash, silica fume and activator solution, sodium silicate and sodium hydroxide. The addition of steel fibers in cement concrete has transformed the concrete into a reinforcement concrete called as steel fiber reinforced concrete sfrc and it is found to have an adequate for opc structural. Steel fibre reinforced geopolymer concrete sfrgc with improved. Fiber reinforced geopolymer concrete is relatively a new composite material in which fibers are. Fly ash based geopolymer concrete gpc has been widely. A thin and short fibre, for example short hairshaped glass fibre, will only be effective the first hours. Fibrereinforced geopolymer concrete with ambient curing for.
Extensive experimental work has been conducted in order to optimize the mix design of fibre reinforced geopolymer concrete. The results of this study support the inclusion of provisions for steel fiberreinforced concrete in building codes and provides recommendations for inclusion in aci 31814 and eurocode 2, so that. Request pdf steel fibre reinforced geopolymer concrete sfrgc with improved microstructure and enhanced fibrematrix interfacial properties geopolymers. Mode i and ii fracture behaviour of steel fibre reinforced. Bond strength of steel bar and plain or fibre reinforced. A total of 15 specimens were tested for determining each property. This paper reports the development of ductile fibre reinforced geopolymer composites dfrgc where the cement binder is replaced by fly ash based geopolymer binder. Mar 14, 2015 polymer modified steel fibre reinforced concrete seminar and ppt with pdf report. The geopolymer is consisted of fly ash, silica fume and activator solution, sodium silicate. Pdf pullout strength of hooked steel fiber reinforced. Experimental behaviour of basalt fibre reinforced geopolymer.
Reducing the greenhouse gas emission is the need of the hour. Itwas shown that for thesamelengthanddiameter,crimpedendfibers can achievethesamepropertiesas straight fibers using 40 percent less fiberss. This paper presents the results of an experimental investigation on the mechanical properties of geopolymer concrete composites gpcc containing 90% fly ash fa, 10% ordinary portland cement opc, alkaline liquids and steel fibers. High yield strength deformed bars of 10 mm, 12 mm and 16 mm diameter were used as reinforcement. Engineering properties of steel fibre reinforced geopolymer concrete. Yifei cui1, obada kayali2, tiejun zhao1 and chunwei zhang1. The fibre reinforced concrete can improve the strength properties of. Mechanical properties of steel fibre reinforced geopolymer. Steel fibre reinforced geopolymer concrete sfrgc with. Asanammal saral published on 20190327 download full article with reference data and citations. Experimental studies on punching shear and impact resistance of steel fibre reinforced slag based geopolymer concrete srinivasankarunanithi. Experimental studies on punching shear and impact resistance. Pdf properties of steel fiber reinforced geopolymer. Pdf influence of fibre reinforced geopolymer concrete.
In steel fibre reinforced concrete specimens, the ultimate load was increased to 1. By the 1960s steel, glass and polypropylene fibres were used in concrete and research into new fibre reinforced concrete continuous today. Strength and durability of fibre reinforced geopolymer concrete. Steel fibre reinforced geopolymer concrete university of brighton. Introduction concrete is very common in this world because of its uses in almost all types of construction. May 31, 2016 but, for more lowtech, lowcost applications, carbon fiber is too expensive. An experimental study on flexural behaviour of fiber reinforced. Bond strength of steel bar and plain or fibre reinforced geopolymer concrete. Studies revealed that the production of one ton cement releases around one ton of co. In this study, geopolymer concrete contains fly ash, ground granulated blast furnace slag ggbs, alkaline. Concrete reinforced with fibres which are usually steel, glass or plastic fibres is less expensive than handtied rebar, while still increasing the tensile strength many times. Of these, six were made of gpc and the remainder were made from steel fibre reinforced geopolymer concrete sfrgpc. The behaviour of steelfibrereinforced geopolymer concrete.
Durability is another important aspect of concrete. Properties of steel fiber reinforced geopolymer scientific. Geopolymer concrete with undensified silica fume showed better mechanical strength compared to that with densified and slurry sf, due to the agglomeration and ineffective dispersion of the latter fume types. Fibre reinforced concrete has a higher flexural strength than that of unreinforced concrete and concrete reinforced with welded wire fabric. May 15, 2017 a number of authors have examined the mechanical and durability properties of fibre reinforced geopolymer concrete, but to date most of the published work focuses on fibre reinforced geopolymer concrete cured under elevated temperatures, which again limits the application of this material to precast elements.
Due to these positive attributes, it is becoming an increasingly popular construction material. Properties and applications offiber reinforced concrete. In this study, the mechanical properties of steel fibre reinforced geopolymer sfrg are investigated. Geopolymer concrete is proven to have excellent engineering properties. Performance of hybrid fibre reinforced geopolymer concrete beams. Many studies have shown that geopolymer concrete has physical and mechanical properties that are suitable for structural applications 46. Concrete is weak in tension, so in order to increase the tensile strength to addition of steel fibers are added to concrete. Steel fibre reinforced concrete seminar ppt with pdf report. The steel fiber reinforced concretes are the building materials which are more significance very fast because of the enhancing demand for high building properties in the building materials. Fibrereinforced geopolymer concrete with ambient curing.
Strength and durability of fibre reinforced geopolymer. These compounds have a more tensile strength to compress, more toughness and more absorption of energy. Most of the previous research on steel fibre reinforced geopolymer concrete sfrgc has focused on the properties of single or binary mixes hardened under heat. Mix proportion of hybrid fibre reinforced geopolymer concrete hfrgpc hybrid fibre composites were prepared by replacing crimped steel fibre having diameter 0. For example, independent of binder type, geopolymer or cement, polypropylene fiber shows a weak fiberbinder interaction and reduces the compressive strength of the composite. The top of the slump cone was leveled off, then the cone was lifted vertically up and the slump of the sample was immediately measured. Polymer modified steel fibre reinforced concrete seminar and ppt with pdf report. But unlike conventional reinforcement which strengthens in one or possibly two directions steel fibres reinforce iso tropically, greatly improving the concretes resistance to cracking. The present investigation is designed to evaluate the mechanical properties of glass fibre reinforced geopolymer concrete composites consisting of 90% fly ash, 10% cement and alkaline liquids. Geopolymer concrete also showed very high early strength. Geopolymer, fiber, fly ash, ggbs, alkaline solution i.
Several papers are presenting geopolymer composite materials involving basalt fibers. Analytical study on fibre reinforced geopolymer concrete. Mar 10, 2020 geopolymer concrete and glass fibre reinforced polymer gfrp bars can provide a good construction system by utilising the advantages of both materials. An investigation of the shear behaviour of steelfibrereinforced geopolymer concrete beams is presented.
The main aim of the current study is to develop steel fibre reinforced geopolymer concrete sfrgc with high mechanical performance without the need for heat curing treatment. Ullah balouchcorrosion of steel fibre reinforced concrete from the cracks. It not only reduces the greenhouse gas emissions compared to portland cementbased concrete but also utilises a large amount of industrial waste materials such as fly ash and slag. Similarly the fibre reinforced geopolymer concrete. However, reinforcement of fly ash geopolymer concrete by steel fibers is still. Few studies have combined these materials, and this is the principal topic of the present study, in which the flexural capacity and behaviour of fly ashbased gfrprgpc beams were investigated. The main aim of the current study is to develop steel fibre reinforced geopolymer concrete sfrgc with high mechanical performance without the need for heat. Fiber reinforced concrete types, properties and advantages.
A comparative analysis has been carried out for normal conventional concrete to that of the steel fiber reinforced geopolymer concrete. Paper open access pullout strength of hooked steel fiber. Performance of hybrid fibre reinforced geopolymer concrete. Efforts have been made to replace the cement based binder in the current fibre reinforced cement concrete with geopolymeric binder resulting in fibre reinforced geopolymer composites frgcs, which is greener than the former one. Flexural response of gfrpreinforced geopolymer concrete beams.
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