High strength concrete is widely used for construction of high rise structures like bridges and dams so on. But using high strength concrete cost us more. Alternatively we can use some admixtures which can increase strength indirectly. In this project we have used GGBS, MICROSILICA AND ALCCOFINE and CRYSO is 1% in chemical admixture. On conducting different trail mixes we have come to know that by using 0%, 5%,10%,15%,20% and 25% is tested in normal water for 3, 7, 28 days. The results showed the suitability of concrete improvement in strength in normal water. In this paper reports from few researchers have been studied on strength and durability performance of alccofine as a partial replacement of cement in concrete. The efforts made by the researchers for enhancing the performance of concrete over the last few years proved that supplementary cementitious materials with mineral and chemical admixtures can improve the strength and durability of concrete. Alccofine is one among the supplementary cementious materials. Alccofine is new pozzolanic material which is bringing technical revolution in the construction industry. From the survey it is found the alccofine can achieve high strength when is replaced by cement at 0% - 20% compared to the traditional concrete. Micro silica is an amorphous type of silica dust mostly collected in bag house filters as by-product of the silicon and ferro-silicon production. The paper summarizes important physical and chemical properties of micro silica and uses those results for an evaluation of micro silica from a Health Safety and Environment (HSE) standpoint. Micro silica consists of spherical particles with an average particle size of 150 nm and a specific surface area of typically 20 m3/g. The chemical and physical properties of this inorganic product are different as compared to other amorphous and crystalline silica poly morphs. More than 500.000 MT of micro silica are sold to the building industry world-wide and are used in fibre cement, concrete, oil-well drilling, refractories, and even in polymers.
Hybrid fiber reinforced concrete can be defined as concrete that reinforced by two or more types of fibers. This study aims to study the mechanical properties of hybrid fiber reinforced concrete where the fibers used were consists of steel fiber and polypropylene fiber. For this purpose five mixes, one normal control mix and four hybrid fiber reinforced concrete mixes were prepared. The volume of steel and polypropylene fiber is kept content from 0.0 to 1%. Slump Test was carried out for each mix in the fresh state in order to determine the workability of the hybrid fiber reinforced concrete. Meanwhile, compressive test, flexural test and split tensile test were carried out to study the mechanical properties of the hybrid fiber reinforced concrete. From the slump test all specimens show low workability. For the result of Compressive split tensile and Flexural Test, the normal control mix shows normal strength development but all the hybrid fiber reinforced concrete mixes gain their strength higher the normal control mix. The expected outcome which is the strength of hybrid fiber reinforced concrete is higher than the strength of normal concrete did achieved. So, further research need to be carried out with some adjustments of methods or materials.
Geo-polymer concrete is totally different in materials and chemistry which is synthesized from waste material like fly-ash (Class F or C), rice husk along with binding solution which is free of cement. This paper gives an overall view of the process and parameters which effect the geo-polymer concrete till date. It is an inorganic 3D polymer which is synthesized by activation of aluminosilicate source like fly ash or GGBS (waste materials). Due to its high mechanical properties combined with substantial chemical resistance (magnesium or sulphate attack), low shrinkage and creep and environment friendly nature (very less amount of CO2 production in comparison with OPC), it is a novel construction material for future. Till date it was seen that the strength of geo-polymer concrete mostly depends on the molarities of the alkaline liquid NaOH& Na2SiO3 (are used for binding of materials.). It was seen that geo-polymer concrete made of fully Fly-ash or partial replacement by GGBS results with 80% reduction in CO2 emission compared to OPC, although the alkaline solution to some extent pollutes the environment.
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