concrete admixtures seminar report pdf download
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concrete admixture in pdf for seminar.if you send this it will be very helpful to me..
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Chemical mixtures are ingredients in concrete other than portland cement, water and aggregate that are added to the mix immediately before or during mixing. Producers use mixtures primarily to reduce the cost of concrete construction; Modify the properties of the hardened concrete; To ensure the quality of the concrete during mixing, transport, placement and curing; And to overcome certain emergencies during concrete operations.


Successful use of additives depends on the use of appropriate dosing and concreting methods. Most additives are supplied in ready-to-use liquid form and are added to concrete in the plant or workplace. Certain blends, such as pigments, blowing agents and pumping aids, are used only in extremely small amounts and are usually soldered by hand from pre-measured containers.

Admix_17641 The effectiveness of a blend depends on several factors including: cement type and amount, water content, mixing time, depression, and concrete and air temperatures. Effects similar to those obtained by adding mixtures can sometimes be achieved by altering the concrete mixture, reducing the water-cement ratio, adding additional cement, using a different type of cement or by changing aggregation and aggregate gradation.
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