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What is Concrete Densifying, and When Do You Need It in Sydney?
Densifying concrete increases the is increasing surface density by sealing pores through a chemical solution called a concrete densifier. The result of using a densifier with concrete is more surface strength and a more rigid surface.
Densifiers are the prime ingredient in the concrete polishing process and warehouse flooring.
Densifier and Its Connection to Concrete
Densifying uses a chemical hardener called a concrete densifier applied on top of a concrete slab. The densifier is utilised in refining when polishing the slab. A densifier is used to increase the span, strength, and endurance of a polished or unpolished slab. This fills the pores of the concrete slab as well as increases its surface density.
A chemical reaction results during the application of a densifier that produces a substance that fills every pore. This process reduces pitting and hardens the concrete surface. Surfaces treated with a densifier increase their surface durability compared to those that are not treated.
How Densifying Works
Free lime (concrete dusting) results from the process of curing concrete slabs. This lime is a calcium carbonate that results in a more potent substance when it reacts with the densifier.
Densifying works as the process makes surfaces less porous. A gel-like product occurs when the densifier combines with the free lime. This product, named calcium-silicate-hydrate gel, forms a continuous layer. This product attaches the concrete and densifier that makes a more durable and stronger slab. Densifying also hinders the floor from dusting.
Advantages of Densifying
Increases structural strength of factories, airports, government buildings, hospitals, and stadiums
Densified floors can resist abrasion, grease, oil, chemicals, and moisture.
Increases the lifespan of any concrete flooring, whether it’s in residential, commercial or industrial property
Characteristics of Concrete
There are colloidal silica and alkali metal silicate densifiers. Densifying involves applying the densifier to the concrete that is absorbed into the concrete slab. Calcium silicate hydrate (CSH) is formed with the reaction between the silicate and the free lime. This increases the amount of CSH formed in the portland cement hydration.
The wrong notion is that the job is done when the densifier has been evenly applied, penetrated, and dried in the concrete. There is a difference in the porosity of concrete throughout a slab. One area may still be absorbing densifiers while the other has already enough. There are porous areas such as the edges, around columns, and higher areas that tend to take a larger amount absorb the densifier faster. Densifiers must be redistributed evenly to areas that are both wet and dry.
Densifying is accomplished when the concrete’s silicate solution has been absorbed and dries out at the same rate. Moreover, it is incorrect to say that the densifier has reacted with the concrete when a densifier gels.
When is Concrete Densifying Needed?
A majority of contractors agree on the process during project application. The addition of a densifier will benefit any polished concrete application. Retail, industrial, commercial, and institutional establishments utilised polished concrete surfaces. Residential locations also are joining the business trend as sustainability becomes the focus.
New or old concrete and interior or exterior concrete surfaces can benefit from densifiers. Cleaning and stripping of sealers or paint or existing coatings should be done on existing concrete. There is a difference in opinion regarding the application of densifiers on new concrete.
There is no perfect time when it comes to applying densification. However, it is best to apply densification within 14-28 days with well-cured concrete as hydration is enough to produce more calcium hydroxide.
The new, pristine slab can have early protection when densifiers are applied to brand new, freshly placed concrete. Densifiers prevent discolouration and staining as well as preventing damages that result from the process of construction.
Tips on How to Apply Densifier
There are many common denominators when it comes to densifying slabs. Scrubbing can break the surface tension and will start to penetrate. This is the solution when concrete stops to absorb the densifier. However, it should be in a liquid state. Water should be added if the densifier is no longer in the liquid state in order to break the surface tension.
A nylon brush, a push broom with soft nylon bristles, or a microfiber pad can be used to apply a densifier. It is preferable to use a broom because of the flowing mechanism of the silicate through the bristles.
The concrete will be able to absorb the densifier for 20 to 40 minutes once the surface tension is broken. Continuous assessment should be done to check if the material has penetrated. The remaining product should be redistributed from the wetter areas to the drier areas. Spread water to all areas and let dry. There is no need to wash the slab if all material has been absorbed.
The densifier is not poured all at once in the concrete slab. The issue is that there is no delineation when it comes to how the clear water and the clear densifier look like. This happens when water is added to the densifier if not all of the densifier penetrates. The better choice is only to apply less amount, and if all of this penetrates, it can be assessed that there is some coverage rate.
Everyone would like to see durable, sustainable, and low-cost polished concrete. This can be done through concrete densifying.
With over five years of experience in the industry, there is nothing we can’t handle when it comes to Sydney’s concrete flooring needs! Wherever you are in Sydney, we can come and assess your property, and then create a plan that suits your preferences, timeline and budget.
Whether it be for your residential, commercial, or industrial space you need expert concrete densifying, our team can get the job done for you! Call us on 📞0412 074 372.
Concrete Densifying Solutions for Residential, Commercial & Industrial Sectors
Whether you need a new slab sealed or are renovating, we can help. We work across all project types from small residential, including concrete driveways, to large retail, commercial and industrial premises.
We perform concrete sealing Sydney-wide, from the Eastern Suburbs to the North Shore, Northern Beaches, Western Suburbs, South and the Shire.
We also cover the Central Coast, Newcastle and Wollongong.
From start to finish the process was so easy. Kynan took the time to answer all of my questions and i am extremely happy with the finished product. Would defiantly recommend using this company.
Thanks so much Kynan for helping us transform our garage! Can highly recommend Evolution Epoxy Flooring to anybody looking to revive a tired-looking floor surface. Great communication, great work ethic, can’t recommend enough. Thanks again