Objective To determine the workability of freshly mixed concrete by using of Vee – Bee consistometer apparatus. Scope and Significance The workability of fresh concrete is a composite property, which includes the diverse requirements of stability, mobility, compactability, placeability and finishability. There are different methods for measuring the workability. Each of them measures only a … Read more
What is Segregation? Wordweb dictionary defines the term “segregation” as – Separation or isolation of one thing from another and place in a group apart from others. In concrete technology, segregation can be of two types. Firstly the coarse aggregate may separate from the main mass of concrete in its plastic state. Secondly, the grout … Read more
Before knowing the term workability let us look at some of the definitions given by scientists and researchers. Definitions of Workability of Concrete According to Granville “it is that property of the concrete which determines the amount of useful internal work necessary to produce full compaction.” Powers defined it as “that property of plastic concrete … Read more
Objective The tests are required to determine the strength of concrete and therefore its suitability for the job. Reference Standards IS : 516-1959 – Methods of tests for strength of concrete. Equipment & Apparatus Compression testing machine (2000 KN) Curing tank/Accelerated curing tank Balance (0-10 Kg) Procedure Representative samples of concrete shall be taken and … Read more
Objective Normally, the strength of concrete is found out after 7 days and 28 days. For some construction activities, it may be too late and need to know the strength earlier. Reference Standards IS: 9013-1978-Method of making, curing and determining compressive strength of accelerated cured concrete test specimen. Equipment & Apparatus Accelerated curing tank Compression Testing Machine … Read more
Objective For determination of consistency of concrete where the nominal maximum size of aggregate does not exceed 38 mm using flow table apparatus. Reference Standard IS : 1199 – 1959 – Method of sampling and analysis of concrete. Equipment & Apparatus Flow table Procedure Before commencing test, the table top and inside of the mould … Read more
Objective For determination of consistency of concrete where the nominal maximum size of aggregate does not exceed 38 mm using compacting factor test apparatus. Reference Standards IS: 1199 – 1959 – Method of sampling and analysis of concrete. Equipment & Apparatus Compacting factor apparatus. Procedure The sample of concrete to be tested is placed … Read more
Object For determination of consistency of concrete where the nominal maximum size of aggregate does not exceed 38 mm using slump test apparatus. Reference Standards IS : 1199 – 1959 – Method of sampling and analysis of concrete. Equipment & Apparatus Slump cone Tamping rod Procedure The internal surface of the mould is thoroughly cleaned … Read more
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