Concrete is a durable material that can withstand all kinds of weather conditions, but when exposed to extreme temperatures and fire, it can sometimes cause chipping. To prevent concrete from flaking or chipping, it is important to take the necessary steps when pouring the concrete. The first step is to use air-dragged concrete that meets ACI requirements for outdoor slabs, sidewalks, and patios. This will help reduce the formation of scale.
Additionally, the ground should be tilted away from the slab to prevent overworking of too wet concrete. The best way to protect concrete from flaking due to moisture is to seal it. For new concrete, apply a penetrating waterproofing sealant 28 days after the concrete is laid and every few years thereafter. A water-repellent sealant can also be applied to reduce water absorption by up to 95%, preventing water from freezing inside the pores.
If you feel that you need an increase in strength and a decrease in water absorption, silicate sealants can be used in combination with water-repellent sealants. First apply a silicate densifier followed by a silane siloxane water repellent sealant 5 to 7 days later. In cold climates, de-icing chemicals can worsen flaking and pitting as they allow more water to enter the concrete and increase the size of the husking. To prevent this, use air-dragged concrete, cure it well, and apply a water-repellent sealant after the slab has cured.
If you have new concrete that starts to show signs of deterioration such as cracking or peeling, there is most likely a problem with pouring concrete. Concrete Treat can be used as a sealant on exterior and interior concrete to prevent moisture penetration into it. Over the course of a winter or over the years, as internal pressure increases and decreases, the surface layer of concrete is stressed which leads to flaking. The best time to tackle flaking is when concrete is first poured, taking steps to prevent it from occurring. In all cases, the main cause of deterioration and flaking is the water content.
Deicing chemicals only aggravate already stressed concrete by allowing more water to migrate into concrete, increasing the size and depth of husking failures when freezing occurs. To avoid flaking or chipping of concrete, use air-dragged concrete that meets ACI requirements for outdoor slabs, sidewalks, and patios. Seal it with a penetrating waterproofing sealant 28 days after pouring and every few years thereafter. Apply a water-repellent sealant to reduce water absorption by up to 95%. If needed, use silicate sealants in combination with water-repellent sealants for increased strength and decreased water absorption.