The process and benefits of concrete resurfacing

It is found that old concrete suffers from cracks, surface discoloration, or surface imperfections. In order to enhance the appearance of the concrete, old concrete should be removed and replaced properly. Here, lies the importance of concrete resurfacing.


Concrete resurfacing refers to a process with which tone or injured concrete floor or pavement surfaces are cleaned, repaired and coated with a new surface to make them usable again devoid of reconstructing the entire structure.

Various steps like cleaning, repairing the cracks, repairing the holes, coating the surface, coloring and sealing, curing are involved in concrete resurfacing.

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Benefits of Concrete Resurfacing

1. The concrete resurfacing is undertaken for the maintenance and durability of the surface. It facilitates resisting cracks for a prolonged period and reduces the chances for development of potholes (In the case of driveways).

2. The concrete contains a light color that helps in managing the temperature as well as delivering a convenient cooling effect throughout summer seasons.

3. Concrete resurfacing is now accomplished by staining with different types of color to apply artistic beauty to the surface.

4. Diverse color options exist in the concrete resurfacing option. It can provide a nice appearance for the home exterior.

5. The elimination of snow from the concrete surface becomes simple with regard to any other surface.


Drawbacks of Concrete Resurfacing
1. If the placement over surface is inappropriate along with the assessment of the present condition, the concrete resurfacing will not be successful. It may cause illustrating the cracks on the surface. To resolve this issue, eliminate the pavement fully and develop a new surface.

2. It is not cost-effective for bigger areas.

For more information, go through the following construction article
https://theconstructor.org/practical-guide/concrete-resurfacing-repair-concrete-floor-pavement-surfaces/20597/

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Posted By Rajib Dey
Website : www.sketchup3dconstruction.com
 Email : rajib_dey@aol.com

Some useful tips on concrete curing

Curing concrete is a complicated method that entails preservation of exact temperature, humidity, circulation, and other aspects. If Cracks occur, the strength of cement is impacted because of insufficient arrangements for these controls. Crystals form with reaction of water with Portland cement.

Curing makes sure that the concrete gains its optimal strength. The strength of concrete is influenced by crystal growth inside the concrete matrix. These crystals develop because of the hydration i.e. the reaction among the water and Portland cement. If water is insufficient, the crystals fail to develop and for this reason the concrete can’t gain the optimal strength. The existence of water allows the crystal development that enfolds the gravel and sand mix, inducing interweaving with each other.



Controls During Curing

Keeping exact curing temperature is vital so that the hydration reaction remains unaffected. If the concrete is very hot, the hydration reaction will be so fast for a proper crystal growth. Therefore, concrete fails to gain accurate strength. If the reaction becomes exothermic, variance in temperature will be produced inside the concrete and it may lead to cracks. Rough surface and a porous concrete structure may be formed because of Inappropriate hydration on the concrete surface. Such porous concrete structures will allow calcium hydroxide to contact the concrete surface that leads to efflorescence. Besides, the concrete structure becomes feeble. Other significant points to be considered throughout the curing are perfect humidity, circulation, insulation, and time control.

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Autogenous Shrinkage

Autogenous shrinkage takes place if the shape of the cement paste is lost because of insufficient water for hydration. Autogenous shrinkage occurs when the volume of the hydrated cement products is under the volume of the cement and water mix prior to starting of hydration. It does not occur for external factors like loss of moisture or temperature variations. Autogenous shrinkage is generally not important in concrete with a water-cement ratio of more than about 0.4. Though, as this ratio is reduced under that limit, autogenous shrinkage is expected to be raised. There will not be sufficient water in the concrete for curing if amalgamated with a water cement ratio below 0.40. In the initial phase, when the tensile strength is low, and concrete is below the effects of high temperature divergence, concrete may crack due to occurrence of autogenous shrinkage.



Improved Curing

The particular controls of temperature, humidity, and time which are vital throughout the process of curing can’t be achieved precisely and for this reason perfect concrete strength and other characteristics are impacted. Self-curing technologies becomes popular as it applies substances for internal curing. Proper materials are used to the wet concrete surface to reduce the loss of water from the concrete. The materials produced are emulsions of paraffins which are dispersed on to the surface. A superior concrete is generated with minor permeability that has superior strength and longevity.

Article Source : http://www.brighthubengineering.com