Point To Remember For Civil Construction Site

Following are the few general point to remember at civil construction site to make the construction work easy while maintaining quality of construction.

• Lapping is not allowed for the bar having diameters more then 36mm.
• For dowel rod minimum of 12mm diameter should be used.
• Chair specing maximum is 1000mm.
• Longitudional reinforcement not less than 0.8% and more than 6% of gross C/S.
• Chair minimum of 12mm dia meter bar to be used.
• Mainb bar in the slab shall not be less than 8mm to 10mm and distributor not less than 8mm and not more than 1/8 of slab thickness.
• Minimum bar of square column is 4nos and 6nos for circular column.
• Diamension tolerance for cube is +2mm.
• Minimum thickness of slab is 125mm.
• Free fall concrete is allowed maximum to 1.50m.
• Lap slice not be used for bar larger than 36mm.
• Water absoption of brick should not be more than 15%.
• Compressive strength of bricks is 3.5N/sqmm.
• PH value of water should not beless than 6.
• In soiol filling as per IS Code, 3 sample should be taken for core cutting test for every 100sqm.
• In steel reinforcement binding wire required is 8kg per MT.

Density of material

                    Material                                                                          Density

                     Bricks                                                                         1600-1920 kg/cubicmeter
                     Concrete Block                                                          1920 kg/cubicmeter
                     Reinforced Concrete                                                   2310 kg/cubicmeter

.
Curing time for RCC members for different type of cement

Super Sulphate Cement -- 7 Days.

Ordinary Portland Cement -- 10 Days.

Mineral and Admixture Added Cement -- 14 Days.


De-Shuttering Time of Difference RCC Member

Fore Columns, Walls, Verticle Formworks:-- 1Day.

Soffit Formworks to Slabs :-- 3Days.

Soffit to Beam Props :-- 7 Days.

Beam spanning over 4.5m :-- 14 Days.

Beam spanning upto 4.5m :-- 14 Days.

Arches spanning over 6m :-- 21 Days.

Arches spenning upto 6m :-- 14Days.

Concrete Sample Required for Different Quantity of Concrete


Quantity of concrete                                                             No of cube required

1-5 cum                                                                                          1No
6-15 cum                                                                                        2Nos
16-30 cum                                                                                      3Nos
31-50 cum                                                                                      4Nos
Above 50cum                                                                       4+1 Nos of addition of each 50cum