CEMIX FASTCRETE Fast Set Concrete is a user friendly formulation of sand, aggregate, cement, and admixtures. It is prepared in a fully computerized environment, where a high degree of accuracy and consistency is maintained. It is ideal for setting posts, fences, clothes lines, mailboxes and any use where a strength of up to 15MPa is required. Its unique composition enables it to be poured in a hole already filled with the required amount of water and the post. No mixing is required and the initial set time is only 15 minutes.
- Letter box posts
- Small signs
- Low fence posts
- Temporary hold of posts before topping with CEMIX MULTICRETE or CEMIX MAXCRETE
- No mixing required
- Fast setting
- Easy and convenient to use
Perfect for all kinds of smaller building and construction projects such as letterbox posts, small signs, low fence posts.
A minimum of two bags is required per post which stands up to 1200 mm. Yield: 0.012m3 per 25kg bag.
DIRECTIONS FOR USE
Due to the fast setting time of FASTCRETE CONCRETE, do not mix in a concrete mixer or wheelbarrow. After a minimum of 15 minutes the hole can be topped up with earth and after one hour the post can withstand wire straining or similar pressure. It is recommended that a third of the post should be below ground. The diameter of the hole in the ground needs to be a minimum of twice the diameter of the post.
FASTCRETE CONCRETE consists of a uniformly blended, properly proportioned mixture of stone, gravel, sand, Portland cement and other admixtures approved for use in concrete to improve workability, performance and the fast set of the product.
- Dig a hole and place your post in it. Keep post off the ground to prevent rot.
- Completely wet the hole and compensate for any ground drainage that might soak up the water required for FASTCRETE CONCRETE. In sandy soils line the hole with plastic.
- Pour 2.5 - 3.5 litres of water, per bag of FASTCRETE CONCRETE.
- Position the post in the centre of the hole and evenly and slowly pour the dry contents of the FASTCRETE CONCRETE bag around the post. Ensure the concrete gets wet progressively as you pour. Do not empty the bag quickly as this will lead to dry patches and you will have to rod to allow for water penetration. If any drying on the top still persists, you can sprinkle water.
- After a minimum of 15 minutes the hole can be topped up with earth and after 1 hour the post can withstand wire straining or similar pressure.
- The average Kiwi fence stands between 1.2m - 1.8m high. For 1.8m plus, Cemix recommends Super Strength Fastcrete.
- It is recommended that a third of the post should be sub ground and covered with concrete. The diameter of the hole in the ground needs to be a minimum of twice the diameter of the post.