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Hi Warm Greetings!
Hi-Tech Engineers & Contractors was formed in 2007 and It has been successfully undertaking all type of building repair works.
Our organization is relatively 16 years old company and I am having 32 years of vast experience in the building repairs.
Our motto is to provide best services to the customer.
Here we are sharing our site experiences in the video formats for easy understanding of the customers what to do? and What not to do?
By seeing our videos you people will get more knowledge about the importance of building repairs and strengthening
You will come to know the details of chemicals being used in the building repairs
Kindly try to select the right people for the right jobs.
Nowadays everybody started doing toilet repairs, roof water proofing and ceiling cracks without sufficient knowledge and the client also seeking low cost works which will lead to repetition of the works. Hence, please select knowledgeable person for the repair works.
Details
For business inquiries: hitechindia.engineers@gmail.com
Location: India
Procedure for Repairs to concrete damaged by corrosion
Typical steps followed during the repair process.
• Design deficiency
• Construction deficiency
• Settlement or swelling of soil
• Reinforcement corrosion
Sometimes structural cracks manifest themselves with some side effects. Doors and windows do not open and close easily. Floors feel uneven. Vinyl flooring tears as a result of crack movement. Plaster begins to show new cracks and even interior corners may develop new cracks. Cracks can develop along the length of the foundation as a result of corrosion of reinforcement.
Types of Structural Cracks
Rust cracking:
Rust cracking is usually a result of corrosion of the reinforcing steel or structural over stressing. The corrosion products are more in volume than steel and these push the concrete in cover region and cause cracks. Such cracks lead to further corrosion. Typically these are seen running vertical in columns and along bottom of the beams.
Inadequate reinforcement cover causes the most common and most serious cause of structural cracking. It gradually develops at varying rates over time depending upon the degree of protection offered by the concrete cover.
Various anti-corrosive coatings are available in the market to prevent the rusting and deterioration of concrete.
Some tolerable crack widths along with their exposure conditions are given in the table.
Reinforced Concrete ( ACI 224R-90)
Observed crack widths, however, are not necessarily very good indicators of durability (the structure’s resistance to corrosion and deterioration). It may be (and ACI 224 states that is should be expected) that some of the cracks in a structure will be significantly wider than those in the table. The amount of concrete cover over the reinforcement may be a better indicator of corrosion resistance than crack width.
Another point to consider when using this table is that it applies only to structural reinforced concrete. These values should not be used to judge crack widths in unreinforced or lightly reinforced slabs on grade or in unreinforced basement walls. Also take into account the high variability in crack widths. Isolated locations where cracks are wider than those in this table 224 should not be grounds for rejection or reduced pay.
Settlement Cracking :
Settlement happens when parts of a house drop below the elevation or height where they were placed during the original construction. Settlement cracking in houses can be minimized if precautions are taken. If building is on filled land, make sure it is properly compacted. Settlement cracking can also be caused due to overload on the foundation.
Geotechnical and soils engineers can perform soil tests to make sure if the soil can support the building.
As you can see from the picture below, which is a typical case for a settlement crack to occur.
Removal of a big tree next to a house can cause sudden changes in the soil moisture level and cause soil movement.
Case 1 shows cracks due to tree removal.
Case 2 shows cracks due to plantation of a new tree.