role of sand in concrete ppt

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  • principles of concrete mix designppt

    Concrete Mix Design -Definition Concrete mix design is defined as the appropriate selection and proportioning of constituents to produce a concrete with pre-defined characteristics in the fresh and hardened stat In general, concrete mixes are designed in order to achieve a defined workability, strength and durability...

  • CONCRETE MIXING RATIOS

    When making concrete it's important to use the correct concrete mixing ratios to produce a strong, durable concrete mix To make concrete there are four basic materials you need: portland cement, sand, aggregate (stone), and water...

  • Portland Cement

    May 22, 2013· Contributes very little strength of concrete eventhough it hydrates very rapidly Also responsible for grey colour of Ordinary Portland Cement; Manufacturing Of Portland Cement The 3 primary constituents of the raw materials used in the manufacture of Portland Cement are: a) Lime b) Silica c) Alumina Lime is derived from limestone or chalk...

  • Manufactured Sand (M

    Manufactured sand (M-Sand) is a substitute of river sand for concrete construction Manufactured sand is produced from hard granite stone by crushing The crushed sand is of cubical shape with grounded edges, washed and graded to as a construction material...

  • What is the purpose of water in concrete?

    Dec 11, 2017· Water plays a very huge role in the concrete mix It's purpose is however broken down into two main things Bonding: water in the ingredient in the concrete that mixes with cement to form what is called a binder It establishes/increases the bond b....

  • Curing of Concrete

    Page of 7 >curing of ncreteco n Curing by preventing excessive loss of moisture from the concrete: either by >leaving formwork in place >20covering the concrete with an impermeable membrane after the formwork has been removed >by the application of a suitable chemical curing agent (wax etc) >or by a combination of such methods n Curing by continuously wetting the exposed...

  • Introduction to Concrete

    Introduction to Concrete ConcreteSs versatility, durability, sustainability, and economy have made it the worldSs most widely used construction material About four tons of concrete are produced per person per year worldwide and about 17 tons per person in the United Stat The term concrete refers to a mixture of aggregates, usually sand ....

  • What is the main purpose of sand in concrete making?

    Jan 28, 2018· The strength of the concrete is inversely proportional to the water/cement ratio In other words, the more water you use to mix the concrete, the weaker the concrete mix The less water you use to mix the concrete, the stronger the concrete mix S....

  • What Makes Concrete a Sustainable Building Material?

    Concrete can be produced in the quantities needed for each project, reducing waste After a concrete structure has served its original purpose, the concrete can be crushed and recycled into aggregate for use in new concrete pavements or as backfill or road base...

  • Corrosion of Embedded Metals

    Corrosion of embedded metals in concrete can be greatly reduced by placing crack-free concrete with low permeability and sufficient concrete cover Low-permeability concrete can be attained by decreasing the water to cementitious materials ratio of the concrete and the use of pozzolans and slag...

  • Properties of Concrete

    Properties of Concrete Concrete is an artificial conglomerate stone made essentially of Portland cement, water, and aggregat Properties of Concrete While cement in one form or another has been around for centuries, the type we use was invented in 1824 in Britain It was named Portland cement because it looked like the...

  • 9 METHODS FOR TRANSPORTATION OF CONCRETE

    May 03, 2014· Methods of Concrete Transportation Transportation of concrete is an important activity in the production of concrete The time taken in transit should be a design parameter as it depends on the initial setting time as well as the requirement of workability at the destination The method of transportation adopted at site should be decided in [,]...

  • Lecture 5 Concrete

    CIV-E1010 Building Materials Technology (5 cr) (3/31) 51 Basic ingredients of concrete Concrete is a mixture of cement, water, fine aggregate (sand) and coarse aggregate (gravel or crushed rocks) in which the cement and water have hardened by a ,...