mixingofconcretewitheffects-151014102053-lva1-app6892.pdf - WEL-COME THE MS UNIVERSITY OF BARODA POLYTECHNIC CIVIL ENGINEERING DEPARTMENT Second sem

mixingofconcretewitheffects-151014102053-lva1-app6892.pdf -...

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THE MS UNIVERSITY OF BARODA POLYTECHNIC Second sem., S.y.d.civil Roll no: 34 to 44 CIVIL ENGINEERING DEPARTMENT
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TOPICS : 1. WHAT IS CONCRETE 2. INGRADIENTS OF CONCRETE 3. VARIOUS TYPES OF CONCRETE 4. PROPOSTIONING OF CONCRETE 5. BATCHING OF CONCRETE 6. WATER CEMENT RATIO 7. MIXING OF CONCRETE 8. SLUMP TEST 9. WORKABILITY MIXING OF CONCRETE
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It is simply defined as the mixture of cement , fine aggregates , coarse aggregates , water , admixtures Concrete used on worked is specified according to IS 456(2000) . It is one of the very important and widely used material in construction . concre te = binder + fillers Cement , water, admixture Fine aggregates and coarse aggregates (which occupies around 60%) CONCRETE
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INGREDIENT cement If fills up voids existing in fine aggregates. It provides strength and binding properties to the concrete mixture. Fine aggregate The particles which passes from IS sieve 4.75 mm & should be retained from 75 micron is known as fine aggregates. It should not contain any organic material. The main function of fine aggregate is to fill-up voids existing in coarse aggregates. Coarse aggregate The particles which are retained through IS sieve 4.75 is known as coarse aggregates. Coarse aggregates should be hard & strong to give enough strength and durability to concrete.
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INGREDIENT Water Water acts as a lubricant for the aggregates and gives workability to the concrete. The quality of concrete depends on the quality and quantity of the water added. Admixture Admixtures or additives as required by situation, ingredients added to concrete or mortar modifies its properties immediately before or after mixing.
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Admixtures 1. Chemical admixture (for specific property i.e. performance & enhancement) 2. mineral admixture (for improvement of long – term strength & durability) others : Air entraining admixtures.
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