add gives 11
multiple near 42 is 44
so 44-42 = 2(ans)
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2:9 11 42 44
Volume of cement mortar = 42 unit ( given)
Ratio of mixing cement to sand = 1 : 6
∴ The volume of cement = 42 / (1 + 6) = 42 / 7 = 6 units
the volume of sand = 6×6 = 36 units.
let x units cement need to be added to make the ratio 2:9.
⇒ (6 + x) /36 = 2 / 9
⇒ 9( 6 + x) = 72
⇒ 54 + 9x = 72
⇒ 9x = 72 – 54
⇒ 9x = 18
∴ x = 2.
Therfore, 2 units of more cement needs to be added to enrich the mortar to the ratio 2:9.
a option is correct
(1) Cement is a fine binding powder that is never used alone but is a component of both concrete and mortar, as well as stucco, tile grout, and thin-set adhesive. Mortar is composed of cement, fine sands and lime; it is used as a binding material when building with brick, block, and stone.
(2) How do you make cement mortar?
How do you make cement mortar?Mixing Mortar by Hand
Measure out 4 parts sand and 1 part cement, and use a shovel to mix it dry on the platform. Make a crater in the middle of the mix, and add a bucket of water and the appropriate amount of lime or mortar additive. Mix thoroughly by shoveling the bottom of the mix to the top and repeating
How to make cement paste?
Cementing Paste is a resource in ARK that is used to make various items and structures. Cementing Paste is crafted in the Mortar and Pestle by combining Chitin/Keratin and Stone. Cementing Paste can also be gathered by other means by: Collecting it from the inventory of a Giant Beaver Dam.
(3) Properties of cement paste
pore structure is very important for paste properties; gel pores (equal micropores) are related to C–S–H phase, but mesopores and macropores diminish strength and durability of the paste. The permeability which governs the ingress of aggressive media into concrete are directly linked with pore structure
Properties of Cement Mortar
It exhibits high water retention for optimal and fast curing times. It has greater water penetration qualities required for stronger masonry wall construction. Cement mortar exhibits compressive strength to meet the standards of a wide array of masonry and construction applications.
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c is the correct answer
Cement mortar is prepared by mixing cement and sand in dry state and then adding required amount of water in it and mixing them thoroughly. The following procedure should be followed to prepare cement mortar by hand mixing.
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