Fun at Seals. Jessie late afternoon float © Robin Moulang
The 8th edition of the iconic, two-day Kromme Swim will this year take place on Friday 6th and Saturday 7th May 2022.
Challenge yourself to 15 kms of epic swimming on the pristine Kromme and Geelhout Rivers.
This year’s event is a descent of the river starting in the upper reaches of the Kromme River and finishing in the St Francis Bay canals.
Day one is a tide-assisted swim down the Kromme River, including a small meander up it’s tributary, the Geelhout River, before finishing approximately 7.5km’s later at Indwe Estate.
Day two begins at Indwe Estate and follows the river course before finishing at The Quays Restaurant in the heart of the St Francis Bay Canals. The swimming distance is again approximately 7.5km’s. Both days will be swum with an outgoing tide.
The Kromme Swim is a team event consisting of 2 members. Teams categories are: Male, Female and Mixed. The minimum age for participation is 21.
Entries are limited to 75 teams.
Entry fee is R1900 per team.
How to mix concrete like a boss
Just because a small building project requires concrete, it doesn’t mean you have to call for help. Instead, follow these steps to mix your own concrete and save money.
- Water hose
- Water bucket
How much concrete do you need?
Concrete is always poured into a “form” or hollow in the ground. To work out how much concrete you need, measure the volume of the space you will fill.
Formula for square, rectangle: Width x Depth x Length = m3.
Post holes (cylindrical forms)
Using a measuring tape, measure the hole’s diameter (width) and depth.
Formula: diameter x diameter = Y
Y x depth = Z
Z x 0.8 = m3
You will need:
A bag of cement is the essential ingredient for concrete, mortar and plaster.
2. Clean concrete sand
Ask your supplier for clean concrete sand. The sand should be free of twigs, roots or other foreign matter.
3. Clean stone
13mm to 19mm in diameter is the ideal stone size.
4. Clean water
If you can drink it, it is suitable for concrete.
For small batches:
(Use a bucket/tin to measure quantities.)
a. Mix in a wheelbarrow.
For larger batches:
(Use a wheelbarrow to measure quantities.)
a. Measure out sand and place it in a long, thin heap on a flat, clean, hard surface.
b. Pour out cement on top of the sand.
c. Mix the cement and the sand together until an even colour is achieved.
d. Create a hollow in the centre and slowly add clean water while mixing until a good paste is formed.
Too much water will reduce the final strength of your concrete!
e. Add stone to paste and mix well. The stone tends to dry out the mix; more water may be needed. The concrete is now ready for placing.
Using a concrete mixer
The batch size should suit the mixer if you use a concrete mixer. Underfilling the mixer wastes time, while overfilling the mixer results in spillage and poor mixing.
a. Measure the quantity of stone and place it in the mixer. Add a little water to wet the stone.
b. Add the measured quantity of cement.
c. Add the measured quantity of sand.
d. Finally, add water, a little at a time, until the concrete is flowable but not runny.
As a rough guide: To mix 1 cubic metre of concrete (1 m3), you will need 4-6 bags of cement, plus approximately 0.7m3 of sand and 0.7m3 of stone.
How do I place concrete?
1. Concrete must be placed within an hour of mixing.
2. Place the concrete as close to the final position as possible.
3. If the concrete is being placed on the ground, make sure the ground is dampened with a spray of water before placing concrete.
4. Once placed, spread the concrete evenly with a rake or spade.
5. The concrete should be well compacted or “tamped down” with a rod or spade, ensuring that the concrete fills the form or hole completely.
6. To create a flat surface (for a slab or driveway), use a wooden straight edge tool. First, use a “chopping” motion, then a sawing motion, to flatten the surface and strike off the excess concrete.
7. Concrete slabs or driveways should be divided into panels to limit cracking. Joints should be no more than 2.5 metres apart for 80mm thick slabs and about 3.5 metres for 100mm thick slabs.
8. Once it has stiffened, keep the concrete damp by covering it with plastic sheeting, damp Hessian, and damp sand, or regularly spraying it with water. For optimum strength, this curing process should be continued for 7 days.
9. For driveways, keep vehicles off the concrete for at least 10 days.