Defination--
Mix design can be defind as the process of selecting suitable ingradient of concrete and deternmine their relative proportion with the objects of producing concrete of certaiun minimum strength and durability as economical as possible.One of the ultimate aim of studing the verious properties of the materials of concrete, plastic concrete and hardent concrete is to enable a concrete technologiest to design a concrete mix for a particular strength.The design for concrete mis is not a normal task on account of the widely verying properties of the constituent materials, the conditions of the demanded for a particulars the exposure condition. and the condition that are demanded for a particular work of which the mix is designed.
Design of concrete mix required complete knowledge of verious properties of this materials. These make the task of mixdesign more complex and difficult. Design of concrete mix need not only the knowing the materials properties of concrete in plastic conditions , it also need wider experience of concrete and knowledge.Even the proportion of the material of the concrete found at the labrotory required modifications and adjustment of suit the field condition. With better understanding of the properties, the concrete is become more and more that exact material than in the past. The structural designer specific certain minimum strength and the concrete technologydesighn the concrete mixwith the knowledge of the materirials, site exposure condition and standerds of supervison available at the site of work to the achive the minimum strength and durability. Further the site engineer is required to make the concrete at site, In some cases the site engineer may be required to slightly properties the mix design.He/She also make cube or cylinder sufficient in no and tested then to confirm the achivement with respectto the minimum specified strength. Mix-design earlier , may have make trial cube with representitive materials to arrive the value of standerd coefficient of variation to be used in the Mix-design.
Manufacturing of concrete include the following stages--
Batching of materials for making concrete is known as batching.
Method of batching:--
What is M20 grade concrete?
M denotes Mix-Design and After 28 days the characteristic strength of concrete ( size 15cm X 15cm X 15cm ) cube is 20Mpa.
Mix design can be defind as the process of selecting suitable ingradient of concrete and deternmine their relative proportion with the objects of producing concrete of certaiun minimum strength and durability as economical as possible.One of the ultimate aim of studing the verious properties of the materials of concrete, plastic concrete and hardent concrete is to enable a concrete technologiest to design a concrete mix for a particular strength.The design for concrete mis is not a normal task on account of the widely verying properties of the constituent materials, the conditions of the demanded for a particulars the exposure condition. and the condition that are demanded for a particular work of which the mix is designed.
Design of concrete mix required complete knowledge of verious properties of this materials. These make the task of mixdesign more complex and difficult. Design of concrete mix need not only the knowing the materials properties of concrete in plastic conditions , it also need wider experience of concrete and knowledge.Even the proportion of the material of the concrete found at the labrotory required modifications and adjustment of suit the field condition. With better understanding of the properties, the concrete is become more and more that exact material than in the past. The structural designer specific certain minimum strength and the concrete technologydesighn the concrete mixwith the knowledge of the materirials, site exposure condition and standerds of supervison available at the site of work to the achive the minimum strength and durability. Further the site engineer is required to make the concrete at site, In some cases the site engineer may be required to slightly properties the mix design.He/She also make cube or cylinder sufficient in no and tested then to confirm the achivement with respectto the minimum specified strength. Mix-design earlier , may have make trial cube with representitive materials to arrive the value of standerd coefficient of variation to be used in the Mix-design.
Manufacturing of concrete include the following stages--
- Batching
- Mixing
- Transporting
- Placing
- Compacting
- Curing
- Finishing
Batching of materials for making concrete is known as batching.
Method of batching:--
- Volume Batching
- Weigh Batching
What is M20 grade concrete?
M denotes Mix-Design and After 28 days the characteristic strength of concrete ( size 15cm X 15cm X 15cm ) cube is 20Mpa.
Concrete Cube (15cm X 15cm X 15cm)
Benifits of Concrete Mix-Design:--
- Reduce thermal peaks.
- High workability for long periods.
- Lower pumping Pressure.
- Reristance of segregation even at high workability.
- Extended setting with longer workability.
- Reduced water content for a given workability.
- Higher ultimate strength.
- Reduce permiability and increase durability.
- Reduce shrinkage and creep.
- Better resistance to aggressive atmosphearic condition.
- Increased ease in finishing concrete.
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