Concrete mix ratio: The strength of concrete mixture depends on the ratio in which these four ingredients are mixed. Concrete mix ratio of 1:3:3 - On mixing 1 part cement, 3 parts sand with 3 parts aggregate produces concrete with a compressive strength of 3000 psi.

May 7, 2015 · Concrete has some disadvantages too along the advantages stated above. Concrete has a relatively low tensile strength (compared to other building materials), low ductility, low strength-to-weight ratio, and Concrete is susceptible to cracking. Concrete remains the material of choice for many applications regardless of these limitations.

Jul 12, 2015 · Concrete shrinks as it dries out. It is advisable to minimize such shrinkage by using concretes with the smallest possible amounts of water and cement compatible with other requirements. In one-way slabs, the reinforcement provide for resisting the building moments has the desired effect of reducing shrinkage and distribution cracks. So shrinkage and temperature …

1) Layout and cut the side forms as per the tread and riser calculations. 2) Fasten the forms firmly and tightly to the foundation of building so that the new stairs can bond well to the foundation wall in a seamless connection. 3) Use wooden stakes as bracing to defend against the outward push of poured concrete.

Gable roof vs Hip roof: There are many differences between gable roofs and hip roofs that are shown in a comparative table for easy understanding.

Timber piles are used in many developed countries for its ease of construction. Timber piles are advantageous in wet and compressive soils to build light structures.