When iron sulfides are exposed to oxygen and water, they undergo a sequence of chemical processes that change them into other compounds. These additional compounds are more expansive than the initial iron sulfides, resulting in fractures or holes in the concrete. The cracks allow moisture to get inside the structure and cause rusting.
CT has a high rate of foundation damage caused by poor construction practices. Homes are built with cheap materials that are prone to deterioration. As a result, many foundations are constructed using techniques that are outdated and not well-suited for the climate.
Heavy loads being carried by these structures cause stress on the concrete, which can lead to damage or destruction of the foundation. This is particularly true if the home was built without a load-bearing wall under the center of the house floor. In this case, all the weight of the building is placed on the foundation, which may eventually fail due to inadequate structural engineering or design.
Environmental factors also contribute to the deterioration of concrete foundations. High temperatures and humidity over time can cause iron sulfates in cement to evaporate, leaving behind only an inert substance called "cementite". Over time, this will increase the volume of the concrete, causing it to crack and break down. Wet conditions can also lead to mold growth in the basement, which can cause structural problems for the home as well.
Concrete is full with water when it is still in its plastic condition (before hardening). When the water gradually evaporates from the slab, it creates enormous holes between the solid particles. These voids weaken the concrete and make it more prone to breaking. Cracks also may appear as a result of freezing and thawing. The ice that forms during freezing breaks down the cellular structure of the concrete, causing it to lose strength.
The most effective way to prevent concrete from cracking is to include more air in the mix. Use a concrete mixer instead of a shovel to create a smoother surface and avoid cracks. Curing time can be shortened by adding more cement to the mixture or by using self-leveling concrete.
If you see concrete cracking inside your home, there are two main reasons for this: either the substrate was not strong enough to support the load being placed upon it or the repair was done incorrectly. If the concrete was used as an exterior surface, such as on a patio, walkway, or driveway, it should be able to withstand some weather conditions. If it cannot, then it should be repaired before it gets damaged too far.
Concrete that is used within walls as flooring should be able to sustain some weight before showing signs of damage. If it cannot, then it should be replaced. Concrete can be damaged by poor workmanship or long exposure to extreme temperatures.
Because of the empty area beneath the slab, concrete slabs can begin to settle and sink as the soil beneath the slab becomes compacted, dries and shrinks, or is washed away. The cement slabs will crack, shatter, and settle with time, becoming uneven with the surrounding slabs. If left unattended, this problem may eventually cause doors and windows to stick, and lead to other problems for your home.
There are two types of solutions for this issue: internal and external. External approaches involve building up the sides of the foundation to provide more height than width. Internal approaches involve building under the slab floor to add more depth than width.
It's important to understand that both types of solutions increase the size of your foundation, which increases your costs significantly. You should consider these options carefully because they will not solve all of your settling problem. In fact, internal settlement can be further exacerbated by these solutions.
Slab foundations are available in a wide variety of shapes and sizes. It depends on how much space you have available and what type of structure you want to build. A slab foundation is ideal for large homes where you need a strong foundation but don't have enough room for tons of rubble on top of it. These include houses in flood zones, high-value properties, and anything else that might get damaged if dirt gets dumped on it constantly.
Cracking is a natural propensity of concrete. Concrete is a liquid when it is initially poured. It solidifies into a solid over a number of days, shrinking as it does so. Within the first few days after installation, this initial shrinkage frequently results in hairline cracking. As the concrete continues to cure, it will continue to harden and shrink, causing the cracks to get wider.
Concrete cracks can be caused by many things such as: heat, moisture, pollution, heavy traffic, etc. Heat causes the concrete to expand and contract more freely, resulting in more cracks. The same thing goes for moisture-and pollution-if the concrete gets wet or polluted, that will also cause cracks to form. Traffic cracks are usually only visible on the outside surface, but they can still cause damage inside the home if not repaired.
Repairing concrete cracks depends on what type of crack you have. Hairline cracks can be easily fixed by using a concrete patch. These patches are available in various colors and styles, and they can be used to fix most cracks. If your hairline crack extends all the way through the concrete, however, it will need to be replaced before it causes damage to other areas of the floor. Wider cracks can be repaired with concrete resins or mixtures. These products are available at any home improvement store and can be mixed by a home repair contractor or poured right into the crack by a homeowner.