Rock Civil Blog

The most commonly used types of bond in Brick masonry.             1.Stretcher bond             2.Header bond             3.English bond             4.Flemish bond   1.Stretcher bond:- Stretcher is the so longer face of the brick as seen in the elevation.The brick size of 190mmx90mmx90mm face is stretcher.in stretcher bond all the bricks are called Stretcher bond.as shown in fig-1             2. Header bond:- A header is the shorter face as seen in the elevation and standard brick size 90mmx90mm face in header bond all bricks masonry are arranged in the header is called header bond. As shown in fig-2 3. English Bond :- an English Bond can be constructed for almost all wall thickness,This bond is the strongest among all other bonds.This bonds consists of alternate course of headers and stretchers is called english bond.as shown in fig...

Types of Walls 1.        Cavity wall: It is the wall consisting of two leaves with each leaf separated by a cavity & ties together with metal ties or the bonding units in order to ensure that the two leaves act as on unit. The space between the two leaves is either left free as a continuous   cavity or filled with non load bearing insulating or water proofing material 2.        Curtain Wall: It is a non load bearing wall subjected to lateral loads only. It may be laterally supported by vertical or horizontal structural members. 3.        Load Bearing Wall: It is the wall which is design to carry & imposed vertical load in addition to its own self weight along with lateral loads, if any. The following table gives maximum slenderness ratio for reinforced load bearing wall. 4.        Panel Wall: It is the exterior non load bearing wall in framed...

(1) Chemical Composition Test Ratio of percentage of line to percentage of silica, alumina & iron oxide non as lime saturation                      factor, when calculated by the formula = CaO-0.7SO3/(28SiO2+1.2Al2O3+0.65Fe2O3 shall           not be greater than 1.02 & not less than 0.66. Ratio of percentage of alumina (Al2O3) to that of iron oxide (Fe2O3) shall not be less than 0.66. Weight of Insoluble residue shall not be more than 1.5 per cent. Weight of magnesia shall not be more than 5%. Total loss ignition shall not be more than 4%. (2) Normal Consistency Test The normal consistency (P) of a cement pest is define as that consistency which will permit Vicat plunger having 10mm dia meter & 50mm length to penetrate a depth of 32mm from the top (or 5mm to 7mm from the bottom) of the mold. Temperature 27+or- 2 degree C, humidity 90%. (...

(1) Colour Grey colour with a light greenish shade . (2) Physical properties (a) Cement should feel smooth when touched between fingers. (b) If hand is inserted in a bag or heap of cement,It should feel cool (c) If a small quantity of Cement is thrown in a bucket of water,It should sink and should not float on the surface. (3) Presence of lumps Cement should be free from lumps .

Please note that top 10 list of cement brands Is made according to the cement Production Capacity of these companies in the  finanacial years 2019.Hance these companies are also 10 top largest cement Production in india 2020.   Table of contents.          (1) Ultratech Cement    (2)  Shree Cemen (3) ACC Cement        (4) Ambuja Cement      (5) Ramco Cement  (6)India Cement (7)JSW Cement         (8)Wonder Cement       (9) Binani Cement          (10) mycem Cement

What is cement:- Cement is an extremely ground material havin adhesive and cohesive properties which provide a binding medium for the discrete ingredients is called cement. (1) Ordinary portland Cement (2) Rapid Hardening Cement-Is:8041-1990 (3) Extra Rapid Hardening Cement (4) Low Heat Portland cement (5) Portland Slag Cement (6) Portland Pozzolana Cement (7) Sulphate Resisting Portland Cement (8) White Portland Cement (9) Coloured Portland Cement (10) Hydrophobic Cement (11) High Alumina Cement (12) Super Sulphated Cement (13) Quick Setting Cementk