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Diploma civil, advance concrete technology book question Explain method mix design

Method-mix design is a procedure for determining the optimum proportions of concrete ingredients to achieve desired properties. It is a systematic approach to mix design that is based on the principles of concrete science and engineering.
The method-mix design procedure consists of the following steps:

• Selecting the desired properties of concrete. The first step in method-mix design is to select the desired properties of concrete. These properties may include strength, durability, workability, and cost.
• Determining the required water-cement ratio. The water-cement ratio is the most important factor affecting the properties of concrete. The required water-cement ratio can be determined based on the desired properties of concrete and the type of cement being used.
• Determining the required amount of cement. The amount of cement required can be determined based on the water-cement ratio and the desired volume of concrete.
• Determining the required amount of fine aggregate. The amount of fine aggregate required can be determined based on the desired workability of concrete and the grading of the fine aggregate.
• Determining the required amount of coarse aggregate. The amount of coarse aggregate required can be determined based on the desired strength and durability of concrete and the grading of the coarse aggregate.
• Mixing the concrete. The concrete is mixed in a mixer until it is uniform in color and texture.
• Testing the concrete. The concrete is tested to determine its strength, durability, and workability.

The method-mix design procedure is a versatile and reliable method for determining the optimum proportions of concrete ingredients. It is used by concrete producers and engineers around the world to produce high-quality concrete.