How to calculate standard deviation of concrete Standard deviation of concrete is the root mean square deviation of all results. Standard deviation is generally denoted by s OR σ. Mathematical formula to calculate standard deviation is as per following
Recommendation for labor output constants for building works in India The labour constants have been arrived at by the Central Building Research Institute, Roorkee by taking actual observations, using work measurement techniques, on the construction sites, Different types of building works up to 10 m height were included where the workers from neighboring states were […]
compressive strength test of concrete -step by step procedure as per Indian standard code Apparatus compressive testing machine should be reliable, of sufficient capacity and able to apply the load at approx 140 kg/ sqcm per minute. The permitted error should be limited to maximum +/- 2 % of maximum load. Age at test compressive […]
Concrete form work stripping time In general stripping of form work should not be done unless otherwise concrete has achieve strength equal to double the stress it may imposed while stripping the form work. Before stripping of form work, compressive strength of concrete is to be checked. If desire compressive strength of concrete is not […]
What is fiber reinforced concrete and its types Plain cement concrete has very limited ductility, resistance to cracking and low tensile strength. Plain cement concrete may develop micro cracks even before load is applied. If uniformly distributed and closed spaced fibbers introduced in plain cement
15 must have construction site laboratory equipments for construction project Quality consciousness is important aspect of construction management, especially when it comes to material. Every material received at site need to be tested for quality checks as per quality control plan. Now a days quality control testing is no longer as
List of Indian Standard Codes | IS codes for brick work and other clay product Following are the IS codes | Indian Standard codes used for brick work and other clay products.