Supplementary Cementious Materials Assignment

   

Added on  2021-02-20

12 Pages3296 Words31 Views
The use of waste minematerials for thedevelopment of sustainableconcrete
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Table of ContentsINTRODUCTION...........................................................................................................................22.1.1 Hydration reaction of Portland cement...................................................................................22.2 Supplementary Cementious Materials ......................................................................................32.3 Properties & Characteristics of Concrete...................................................................................42.3.1 Strength..........................................................................................................................42.3.2 Water Permeability........................................................................................................42.3.3 Carbonation...................................................................................................................52.3.4 External Sulphate Attack...............................................................................................52.3.5 Freezing and Thawing...................................................................................................52.4 Influence of SCMs on properties of Concrete...........................................................................52.5 Influence of SCMs on characteristics of Concrete....................................................................62.6 Waste Materials.........................................................................................................................72.6.1 Use of waste materials in Concrete...............................................................................72.6.2 Use of waste mining materials in concrete....................................................................7CONCLUSION ...............................................................................................................................8REFERENCES ...............................................................................................................................91
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INTRODUCTIONConcrete is a material that is made up of various aggregate materials like sand, crushedstones etc. and added together with a fluid cement which becomes hard after the mixture of allthese, over a time. This report is based on the use of waste mine materials in order top developsustainable concrete. The report will highlight the Hydration of Portland cement as well asinclude the use supplementary cementious material. It will also mention the properties andcharacteristics of concrete including its strength, water permeability, carbonization, attack ofexternal sulphate as well as Freezing and Thawing of concrete. The report will also include theinfluence of SCMs on properties of concrete as well as the SCMs influence on concretecharacteristics. Further the report will include the use of waste materials in concrete as well asuse of waste mining materials in order to develop a sustainable concrete.2.1.1 Hydration reaction of Portland cementAccording to Nuaklong and et.al., (2016)Portland Cement is the most common cementused in general. The cement is a basic ingredient of concrete, mortar and other plasters. Thecement was named as Portland cement as due to the similarity of its colour to Portland limestone. As per the views of Özbay and et.al., (2016)when water is mixed with the cement, itforms a paste that brings together aggregate materials. Water hardens the concrete through aprocess called hydration. On the other hand Al-Tulaian and et.al., (2016)argues that Hydration isa process of chemical reaction where the elements in the cement form chemical bonds with thewater molecules and tuns out to be hydrates or hydrate products. The role of water is muchimportant for the formation of concrete as the ratio of water to the cement is much more criticalfactor for producing “perfect concrete”. According to Jangand Lee, (2016) concrete is themixture of cement, water and other aggregates and later formed into a paste which is thenmoulded and consolidated and later kept to dry so that it turns out to be hard concrete. Concreteneeds a moisture for hydrating and becoming harder. Concrete when starts to dry up it actuallystops getting stronger. Concrete with too less water may be dry but it wont be strong enough orfully reacted. The properties of such concrete would be probably less than wet concrete. On theother side Kannan and et.al., (2017) argues that adding up of too much water in the cement willprobably reduce the strength of the concrete. Hence the reaction of water with the cement isextremely important as for the characteristics and properties of concrete which will continue for2
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