Therefore M30 concrete will have a compressive strength of 30 n/mm2. A standard mix may also specify the maximum aggregate size. Aggregates are the stone chips used in concrete. If an engineer specifies M30 / 20 concrete, he wants M30 concrete with a maximum aggregate size of 20mm.
May 22, 2018· by Giatec Scientific Inc. May 22, ... Step 6 calculates the quantity of fine aggregate required for the proposed concrete mix. The amount of fine aggregate is calculated differently depending on the method of calculation (per weight or per volume) you choose .
simply workabilty is the w/c ratio in concrete. more the w/c ratio higher the workability and vice versa. and it is true that excess amount of w/c ratio doesnt give proper strength. so workable ...
Oct 14, 2015· Water cement ratio Concrete ratio quantity Water 1:3:6 34 litre 1:2:4 30 litre 1::3 27 litre 1:1:2 25 litre For different ratio of concrete the amount of water for 50 kg of cement is as below: 17. Mixing of the concrete For producing the homogeneous mass of concrete, the ingredient are mixed .
I) In water retaining structure a dense impermeable concrete is required therefore, proportion of fine and course aggregates to cement should be such as to give high quality concrete. Concrete mix weaker than M20 is not used. The minimum quantity of cement in the concrete mix shall be not less than 30 kN/m .
Quantity of cement used in one cubic meter of pcc? Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any sizereduction requirements including, Quantity of cement used in one cubic meter of pcc?, quarry, aggregate, and different kinds of minerals.
Dec 06, 2016· The mixes of grades (if we consider them in the ratio a:b:c then acement, bsand, caggregates) GRADES MIXES M10 1:3:6 M15 1:2:4 M20 1:1:5:3 M25 1:1:2 14. DEMERITS OF CONCRETE CONSTRUCTION • 1. Week in tension:Concrete is week in tension so large amount of steel is required.
Oct 14, 2019· [ B ] structure is economical than steel structure [ C ] Strength of concrete decreases as age increases [ D ] can be used for under water and marine structures Answer : C 3 Water cement ratio is the ratio of [ A ] Water to cement by weight
Mechanical properties of recycled aggregate concrete Concrete made with 100% of recycled coarse aggregates has 20–25% less compression strength than conventional concrete at 28 days, with the same effective w/c ratio (w/c = ) and cement quantity (325 kg of cement/m 3 ).
CONCRETE DURABILITY CONCRETE REQUIREMENTS AlkaliSilicaReaction Resistant Concrete Airstrip / Highway Aggregate concept Mix design binder concept Abrasion Resistant Concrete Discharge unit of a dam Gen. Hydro Power Surface hardness Mix design (aggregates) w/c Chemical Resistant Concrete Waste water treatment Surface protection w/candbinder
Mar 23, 2015· On the other hand in smaller size aggregates the surface area is increased which increases w/c ratio and lower strength is achieved. In general for strength upto 200 kg/cm 2 aggregates upto 40 mm may be used and for strength above 300 kg/cm 2 aggregate upto 20 mm may be used. Conditions That Decide Maximum Size of Coarse Aggregate to be Used in Concrete
Moisture available in soil should not absorbed by footings which causes corrosion of reinforcement. ... The use of aggregate as an inert filler can be extended to the inclusion of stones unto 300 mm size in a normal concrete which has amount of cement is increased then ... Compressive strength and Quantity of Materials Required for ...
So, the required Cement is, = (154÷) x 1 =28 cubic feet. The required quantity of Sand is, = (154÷) x = 42 cubic feet. The required Stone chips are, = (154÷) x 3 = 84 cubic feet. As we know, Cement is available as 50kilo bag in the market and the volume of 50kilo cement bag is 1¼ cubic feet.
The effects of aggregate type, size, and content on the behavior of normal and highstrength concrete, and the relationships between compressive strength, flexural strength, and fracture energy are discussed. The concrete mixtures incorporate either basalt or crushed limestone, aggregate sizes of 12 mm ('h in.) or 19 mm (:Y. in.), and
By Raj Mohammad Khan. Following table shows the M30 Mix Designs as per IS, hope this helps all civil engineers here
Aggregate Concrete and results were compared with the Natural Coarse Aggregate Concrete. The studies were conducted with an M25 mix with the selected w/c ratio: and the development of compressive strength of the recycled aggregates concrete and natural aggregates concrete at the age of 7 28 days were studied.