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Concrete is a mixture of sand (fine aggregate), stone (coarse aggregate), and cement, which is a powder that has a chemical reaction when mixed with water. It's that chemical reaction that causes concrete to harden, and it's why the amount of water you put in your concrete is so important. Too little, and the reaction won't happen properly.

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You can use it for fence post footings, deck footings and even small concrete pads. For jobs requiring more than about 30 bags, consider ordering "ready-mix" concrete from a truck instead.. Here are a few tips to avoid the problem and find the right concrete mix ratio. First, pour a measured amount of water (amount varies with bag size.

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What Is the 1-2-3 Concrete Mix Ratio? The 1-2-3 ratio is exactly what the name suggests; 1 part cement powder, 2 parts sand, and 3 parts washed aggregate. Water can be added in any volume depending on how you use the concrete. If you are putting up fence posts, you want the mixture a little on the wet side so you can pour it into the hole.

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Calculate the hole volume using 3 times the width of the post or 10.5″ or 0.88 feet: 0.88′ × 0.88′ × 2′ depth = 1.55 cubic feet. Subtract the post volume from the hole volume: 1.55 - 0.17 = 1.38 cubic feet per post hole. Multiply times the total number of posts: 1.38 × 20 posts = 27.6 cubic feet. Add 10% for waste = 30.36 cubic feet.

Concrete mix ratio Concrete mix design FantasticEng

In five simple steps, this video will show you how to successfully put up a fence post and have it set in just 30 minutes with Sakrete ready mix concrete

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For a six-foot-high fence post, we would need a hole that's 36 inches deep and 12 inches in diameter. Now that you've determined the size of the hole you'll need, you can use the chart below to determine how many 50-pound bags of concrete you'll need. Our example post will require two bags for every post if you're using fast-setting.

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In respect to this, and only as a rough guide, the ratio of water to cement should be around 0.55. If your total cement requirements were 25kg, then the calculation would be: 25 x 0.55 = 13.75kg (litres) of water. Water in litres = Total volume of cement required x 0.55.

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Learn the basics of setting posts and poles - and the advantages of using Fast Setting Concrete to get the job done faster - with Sakrete Expert Dirk Tharpe.

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Concrete Mix Ratio: Max. size of aggregates (mm) Water for dry aggregates (liter)* Water for aggregates condition from dry to moist batch (liter)* Water for best consistency (liter)* Small precast work, fence posts, poles, garden furniture and other work of very thin sections: 1:2:2: 16: 20:

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May 31, 2022 by BuilderLens. The best concrete mix for setting fence posts is a standard mix with a ratio of one part cement, two parts sand and four parts gravel. This is due to the fact that it creates a strong bond between the post and ground, making it more stable and resistant to rot. The exact proportions will depend on the type of fence.

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Mixed Concrete in a Fence Post Hole. Any concrete producer will tell you that it should be mixed wet and then poured. Concrete trucks drive around with mixing wet product for a reason. Think of it this way. You can toss eggs, milk, flour and sugar into a cake pan unmixed, cook it and get something that sort of resembles cake.

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Line up any stakes in between that might be out of line. 2. Dig holes for fence posts. Now you need to dig the holes for the post. As a guide, make them three times the size of the post. So a 3 x 3 inch post should have a hole approximately 9 x 9 inches. If installing a six foot fence panel, dig down two feet.

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When making your own concrete it's important to use the correct concrete mixing ratios to produce a strong, durable concrete mixture. Some basic mixing ratios for concrete are 1:2:3, 1:3:3, 1:2:4. These mixing ratios are based on the proportions of cement : sand : stone in that order. The ratio you use will depend on what psi strength you need.

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1. Determine the number of fence posts: Measure the length of your fence line and decide on the spacing between posts. Divide the length by the spacing to find the number of posts needed. 2. Calculate the volume of concrete per post: The typical hole for a fence post is about 1/3 of the post's length. Calculate the volume of concrete needed.

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Randy explains the step by step details in mixing your concrete to fill a post hole. Several safety tips are mentioned. So if you've ever thought of puttin.

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The general rule of thumb for the diameter of fence post concrete bases is three times the size of the post that will be installed in the concrete. So, if your fence post is 100mm or 4 inches, your concrete base would be at least 300mm or about 12 inches. While that is usually the minimum diameter for your concrete bases, there's no rule that.