Croydon Fire Station

The London Fire and Emergency Planning Authority approached Ronacrete to discuss concrete repair, brick repair and rendering works to the training tower and rear boundary walls of Croydon Fire Station. The project was completed using a variety of products selected from Ronacrete’s Concrete Repair and Protection and Waterproofing and Tanking ranges.

 

Training tower
The contractor carried out investigation works before removal of defective concrete from the training tower. Steel reinforcement bars were cleaned, and Ronacrete Standard Primer was applied to the prepared bars. The areas to be reinstated were primed with Ronacrete Standard Primer, and the concrete was repaired using RonaBond Concrete Repair Mortar. Ronacrete Curing Membrane was spray applied to the fresh mortar, to prevent rapid surface moisture loss.
Rendered rear boundary wall
Prior to undertaking brick and render repairs to the rear boundary wall, vegetation was cut back and the wall was cleaned, to remove all surface dirt and debris. All cables were temporarily removed from the wall surface, existing render was hacked off, and the wall was dismantled. The original bricks were re-used to rebuild a 2m x 1.5m section of wall at parapet level. The wall was rendered with Ronafix Mix A Weatherproof Render incorporating a bell cast drip. Ronafix Slurry Coat was applied to the prepared wall.  Two coats of RonaBond Masonry Coating WB, high opacity, water-based coating were applied to the finished surface.

 

Unrendered rear boundary wall
The contractor cut back the vegetation and cleaned the wall, to remove all surface dirt and debris. Joints were raked out to a depth of 25mm, and re-pointed using a 4:1 sand and cement mortar.  A section of bowed wall at parapet level was dismantled and rebuilt. Ronafix Slurry Coat was applied to the prepared wall and the finished surface was coated with RonaBond Anti-Carbonation Coating WB.

DRYING OF SCREEDS

BS 8204-1 “Concrete bases and cementitious levelling screeds to receive floorings — Code of practice” section 6.11.1 suggests the following calculation for drying of screeds with no fast drying additi ...

Read more

AVOIDANCE/ MITIGATION OF THE EFFECTS OF COMMON FORMS OF CRACKING IN CEMENTITIOUS SCREEDS

Aggregate is usually 0–4 mm and is mixed with cement in the ratio of 1:3 or 1:4 cement to sand, depending on strength requirements and drying requirements. For total screed thicknesses in excess of 50 ...

Read more

Carbonation of Reinforced Concrete

Carbonation is the single most common cause of reinforcement corrosion in above ground structures and although many construction professionals and contractors are familiar with the progression of carb ...

Read more

Here to help...