Construction Crack

1. New Construction Crack In Basement Floor

However, due to the temperature and time, the material starts to deteriorate and expand timely. From cement to bars every material will be affected by the temperature and changes its volume. Any structure that comes into direct contact will affect by this.Read also –That’s the reason why we provide different types of construction joints to withstand the volume change (except control joint). Contraction / Control Joint. Construction Joint. Expansion JointWhat is Contraction/Control Joints?Once the concrete gets poured and hardened, the water in it starts to evaporate and makes the concrete to shrink and develop shrinkage cracks, especially on longer slabs.

New Construction Crack In Basement Floor

Contraction or Control joints are provided to avoid this crack from developing to the entire area. Purpose of Control JointsBasically, control joint is the action of making a saw cut groove and weaken the slab where we think the crack may occur due to shrinkage (Mostly at the middle of the slab). Refer the diagram. This way the cracks developed under the slab find its way at the weak point (the point we have grooved) and avoid spreading all over the slab. What is Construction Joints & Its Purpose?In a day we only pour a certain amount of concrete and leave the rest to the next day even though it all act as one complete structure for load transfer.

Construction joints are used to strengthen the unit and make it as one whole unit.That means we purposefully make the concrete pour in certain shapes and stages like shown in below. So that the next fresh set of concrete will blend together with the older one and act as one whole unit. This is known as construction joint. What is Expansion Joint?Expansion Joint on the other hand, as we told earlier, the materials gets expand due to temperature. If we construct the adjacent structure without providing expansion joint then the volume change will affect the adjacent structure and gets it defigured. Makes the whole structure collapsed.Purpose of Expansion JointsProviding expansion joints makes room for the structure to allow to move or expand according to their properties. These gaps will be filled by some allowable materials such as bitumen or fiberboard.

We can see these mainly at and sometimes in a long set of building units constructed very closely.Contraction JointControl JointExpansion JointHope you have enjoyed the post. Please do share with your friends. Happy Learning 🙂.