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Showing posts from March, 2021

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Plasticizer charts - Admixtures used in RCC

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  Admixtures      Functions         Typical compounds Application     Disadvantages Accelerating admixtures or accelerators More rapid gain of strength or higher early strength. More rapid setting. Calcium chloride Calcium formate Triethanolamine  (TEA) Soluble inorganic salts Sodium nitrite Sodium sulphate Sodium aluminate Sodium silicate 1. Normal rate of strength development at low temperature. 2. To counter retarding effects 3. Shorter stripping times. 4. Plugging of pressure leaks. 5. Sprayed concreting. 1. Possible cracking due to heat evolution. 2. Possibility of corrosion of embedded effects reinforcement. Retarding admixtures or retarders Delayed setting Soluble carbohydrate derivatives: starch Hydroxylated carboxylic acids, Inorganic retarders Sugars 1. Maintain workability at high temperatures. 2. Reduce rate of heat evolution...
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Irrigation - Civil Engineering

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Irrigation Civil Engineering Types of Irrigation Flow Irrigation Lift Irrigation Perennial Irriagation Direct Irrigation Inundation Irrigation Storage Irrigation Combined Storage and Diversion scheme (well irrigation) (The water required is supplied to the crop through out the year)  (diversion scheme) (or) (River canal irrigation) (Water is directly diverted to canal without storing)  (The irrigation is carried out by deep flooding)  (storage scheme) (or) (Tank irrigation) (Water is stored in dam (or) reservoir)  (Water is stored in dam (or) reservoir and then diverted to canal)  (Subsoil water is lifted to the Surface and conveyed to agricultural fields.) All study of Irrigation in Civil Engineering in Exam point of view  click here or go to following site Irrigation and its all study CHAPTER HIGHLIGHTS ☞ Introduction ☞ Types of irrigation ☞ Methods of irrigation ☞ Water requirements of crops ☞ Irrigation efficiencies ☞ I...
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