Category Archives: Concrete

What is Concrete and how is it placed?

Concrete is a mixture of two components: aggregates and paste. The aggregate component is normally composed of sand and gravel or crushed stone. The paste component is normally comprised of cement, water and admixtures.

Concrete is usually placed using either the form-and-pour or form-and-pump method. Both methods usually involve the design and construction of formwork around the repair section (or new construction application), in order to shape the final grade of the concrete section to be placed. Placing concrete into a horizontal concrete repair section would be the exception, wherein formwork is generally not required.

Apartment Building, North York, ON

apartment

Original construction of this 30 year old building resulted in the balcony slabs being curled back toward the building. A cementitious topping was applied years ago in an attempt to divert the water away from the building but had since cracked and delaminated. Delso Restoration Limited suggested using KING FA-S6 to replace the topping due to their past success and working knowledge of the product.

Phase I (West side of building) and Phase II (East side) were completed in 1996 and 1997 respectively. The original topping was removed; the slabs were scarified with a 7 KG (15 lb). hammer and then cleaned. The FA-S6 was applied with a minimum of a 2.5 cm (1 inch) depth to 80 percent of the balcony slabs. After curing, all slabs were sounded and no delamination or cracking was evident. Both Delso Restoration Limited and TAK Engineering Limited are pleased with the results and would recommend the use of FA-S6 in the future.