How to make a reinforced concrete fence post

Apparently, it's time to tell about the aspects of creating a reinforced concrete fence column. Since I have long wanted to do it. And for beginners in the matter of concreting something, it is useful to find out the true technology for creating cement mortar. Why am I saying true? The fact is that, having shoveled (no, not sand with cement) a lot of information sources on cementing, I was faced with an incredible range of opinions, a variety of actions, a range of proportions. It seems to be true. Depending on the grade of cement, the desired grade of concrete, the desired proportions and consistency are chosen. But the authors of many articles did not focus on details. After all, such work is considered dusty, dirty, even uncomfortable. I want to quickly deal with them. What to say about pouring concrete pillars with their own hands? But in all there is a measure, more precisely, a golden mean. And in this article I will tell you,how to create a reinforced concrete pillar design with your own hands with the right cement-sand mortar. After much deliberation, I decided that I would still share calculations regarding the cost of the material. Therefore, those who want to save on the manufacture of concrete columns during the construction of the fence, be sure to read the article to the end. Or they may re-read one more time.

Tools for filling columns

  • Measuring tape.
  • Gloves.
  • Powerful nippers.
  • Pliers.
  • Wrench and screwdriver.
  • Manual file or electric jigsaw .
  • A sledgehammer and an anvil for straightening an armopoyas.
  • A trowel.
  • A bucket of 15 liters.
  • Measuring tanks.
  • For mixing, you need an electric drill with a mixer attachment. It will facilitate the process. After all, twenty-five pillars are not a joke.

Preparatory work

For a successful start, I share the work on preparing the material and manipulating the cement mortar. The procedure is as follows:
  • Let's start with the pipe. Mark two parallel longitudinal lines on opposite sides of the pipe. These are cutting lines.
  • Use a hand saw or electric jigsaw for cutting.
  • Align the two halves,laying one in the other.
  • Drill the stud hole exactly in the middle of the pipe.
  • Set aside the pipe parts and go to the reinforcement element.
  • Measure the length and width of the mesh for reinforcement. Length - this is exactly half of the purchased sheet 1x2 meters. But the width is equal to the perimeter of the pipe, that is, 34 cm. Here, work with the wire cutters.
/2018-07/medium/1531301590_1.jpg "style =" max-width: 100%; " alt="How to make a reinforced concrete pillar for a purge fence by one's own hands"> How to make a reinforced concrete pillar for a fence with your own hands
  • Twist the workpiece into a cylinder. There are two ways to sweep: out through with crossbars or inward. Of course, you need to twist out transverse rods. In the opposite embodiment, the halves of the pipe collide with an obstacle when closing the box in the form of longitudinal rods. Bending and twisting the mesh is not a simple matter. Use gloves, natural stops and pliers. Be attentive and careful. The grid is bent gradually. Observance of the exact size of 34 cm will save unnecessary actions in the future.How to make a reinforced concrete pillar for blowing your fencehands
 How to make a reinforced concrete pillar for blowing a fence yourself
How to make a reinforced concrete pillar for a purge fence by one's own hands
  • After twisting, beat off the irregularities with a sledgehammer.
 How to make a reinforced concrete pillar for a purge fence with your p kami
 How to make a reinforced concrete pillar for blowing a fence yourself
How to make a reinforced concrete pillar for a blow-in fence by yourself
  • Try on the armored belt in the two halves of the pipe.
  • Fix the inaccuracies of closing with a sledge hammer by disassembling the structure.
  • Cut the punched tape into three equal lengths.
  • Make clamps of them.
 How to make reinforced concrete pillar for blowing the fence with your own hands
 How to make a reinforced concrete pillar for blowing a fence with your own hands
  • An additional element, which is required is a disk from plywood with two short bolts. It is needed as a bottom.And bolts are necessary for forming holes for future fastenings of transverse fence bars. The diameter of the bottom should be exactly the same as the diameter of the sealing ring sewer pipe. The place of the seal, it is also the place of docking of the pipes, differs in the socket.
How to make a reinforced concrete pillar for blowing a fence yourself
How to make a reinforced concrete pillar for blowing a fence with your own hands
After the bottom is ready, proceed to the assembly of the structure:
  • Lay the grid into the pipe.
  • Place a plywood disk instead of a compactor.
  • Secure the clamps at an even distance.
  • Pass the pin through the holes.
  • Center the line of bolts on the bottom and the protruding ends of the stud. These points are the fixing points of the fence.
  • Tighten the bolted joints.
  • Glue the two side lines with adhesive tape.
How to make a reinforced concrete pillar for blowing a fence yourself
How to make reinforced concretepillar for blowing the fence with your own hands

Pouring the column with your own hands

Cement manufacturers recommend kneading the solution at a temperature not lower than +20 degrees. I adhered to this value. I think , it is optimal. The proportional composition described above will not be repeated, but I will draw your attention to the second important point - the order of mixing. The fact is that liquid glass reacts with water. Do you say what reaction? I answer: it dissolves.
  • Water, preferably warm (+20 degrees), is filled with liquid go to the glass. Then it is stirred.
  • The cement is measured and poured in. It should be thoroughly stirred. After two minutes it will swell.
  • Then, sand is added in equal portions I mixed it with a homemade mixer, put it on a drill. A four-blade mixer was made from the same stud and punched tape. Plus four nuts.
  • Know that by adding water while making sand to make it easier to mix, you break the integrity of the bond of glass and cement. And this is a disadvantage in the future. However, the minimum amount of water at the end of mixing is sometimes necessary.
Pouring the solution into the mold is carried out on level ground without the threat of falling. Tramping produce a long rod or a stud.Although long, but light tapping on the body more efficiently. Airblowing occurs mainly in the upper part of the column, as the mass of the pressing concrete becomes smaller. By the way, the column itself is poured upside down. After 24 hours, the concrete will harden. This speed contributes to liquid glass. After another 6 hours you can remove the plastic form. But I do not recommend perederzhivat. There is a possibility of sticking during overexposure. I want to say that I do not use central reinforcement. P cost is obtained more expensive. But for a post length of 2 meters, it is necessary.
How to make a reinforced concrete pillar for blowing a fence yourself
How to make a reinforced concrete pillar for blowing a fence yourself
How to make a reinforced concrete pillar for blowing a fence yourself
How to make a reinforced concrete pillar for blowing a fence yourself
How to make a reinforced concrete pillar for blowing the fence yourself
How to make a reinforced concrete pillar for blowing a fence yourself
How to make a reinforced concrete pillar for blowing a fence yourself
How to make a reinforced concrete pillar for blowing a fence yourself
How to make a reinforced concrete pillar for blowing a fence with your own hands

Conclusion

In conclusion, it is worth noting that many inexperienced householders and even workers disregard the calculation regarding pouring concrete. In my experience, I have shown that in this matter, cost savings are not in last place. In addition to 13,080 rubles spent on wood, pouring 25 pillars cost 2,975 rubles. Performance 1 pillar / day will provide you with a daily two-hour work for about a month. Although the installation and casting can be laid in 1.5 hours. And these are already questions of experience, consisting of acquired skills and knowledge.
How to make a concrete pillar for a fence with your own hands

Small calculations and why do you need a concrete column?

Imagine that you need a fence.Let it be a small purge fence of racks or a bit more massive - from a board with end dimensions of 100x20 mm. Quite normal fence. You're not one of those who hides their infield from their neighbors behind a profiled sheet of iron? I agree that iron is durable. But nature must breathe. Your land is no exception. Let's say you counted the cubature of the boards. The amount is not small. And the overwhelming number of private homeowners want to save money. I will describe the first calculation based on the meter height of the fence on a plot of 7 acres:
  • The length of one side of the plot is about 25 meters.
  • The board used is at the end 100x20 mm.
  • The interval between the boards in the fence is 100 mm.
  • 5 boards are required per meter of fence length.
  • 125 meters are required for 25 meters length boards.
Total, at a price of 10 thousand rubles for a cube of edged planed boards for one side of the fence, consisting of 125 boards (0.25 m3), you will have to pay 2,500 rubles. Why should we count the boards, if the subject of the issue is a concrete pillar? But I have another question. Why do you need a concrete column? Do sports engage and lift weights? This, of course, is a joke. But I want to frighten you a little with initial pricing to orient to the number of poles around the site.Here you can not do without saving, so get ready for more complex mathematical formulas. To the upper sum is added the cost of the longitudinal bar, which acts as a fence. And here is the moment. The optimum span between supports is three meters. We divide 25 by 3 and we get a rounded value of 8. That is, 16 three-meter bars are required on one side of the plot (this is up and down). With the size of the end of 40x40 mm, the cost is 770 rubles. Total for the entire perimeter of the necessary bars and boards in the amount of 13 080 rubles. This is really a lot, if you add about 20 m2 in area for painting a protective composition. Because of your passion for anticorrosion coatings, you decide which composition to buy. Here it is worth thinking about saving on the pillars. And to make a fence beautiful and natural. Returning to the posts, their number is easily counted:
  • 8 pieces are required per side.
  • For the entire perimeter 24.
  • Plus 1 on the gate.
The support is buried deep in the ground by at least half a meter. With a meter height of the fence, the height of the pillar will be 1.5 meters. But there is a trick: to use meter columns, deepening them also half a meter and leaving the same height from the ground.The crossbar at the same time are mounted on the top point of the pillar and in its middle right at the surface of the earth. Such a construction of a meter height with half-meter supports meets the requirements of the resistance of materials. That is, it is strong, reliable, economical in terms of construction. And now I am answering the question of why a self-made concrete pillar is needed:
  • Creating a reliable support.
  • A natural combination of materials.
  • Good design. After all, a pillar is easily painted in the same color as a tree.
  • Saving for zero losses.
  • The ease and simplicity of filling meter-high columns, unlike larger samples heights. But more on that further.
In addition, you will work out one of the building technologies.

Required materials and calculation of a concrete column

Having decided on the quantity, and we have 25 of them, we turn to the calculation of materials of manufacture. We will need:
  • - Sewer pipe.
  • - Punched tape.
  • - Hardware group.
  • - Steel welded wire mesh.
  • - Cement.
  • - Sand.
  • - Water.
  • - Additive.
As a form, I used a standard PVC pipe with a diameter of 110 mm. The mistake was that I bought a pipe for domestic sewage. After a longitudinal cut after a while, she cringed in the literal sense. How would have dried up.Therefore, you need to take not a gray, but a brown pipe for external sewage marked with polyvinyl chloride with nylon or polypropylene. These are the two materials of manufacture. The first is more rigid, the second is flexible. Although the wall thickness of both 3.2 mm. And plastic keeps its shape perfectly after multiple fillings. I personally prefer nylon polyvinyl chloride since it is tough. The cost of a meter tube is 180 rubles. We will need one piece as a form. We'll do the calculation right away: - With a diameter of 11 cm, the perimeter is 34.5 cm. We take 34 cm, since 0.5 cm will go to two longitudinal cutting lines of pipe. - The volume is 9.47 liters. Round up to 9.5 liters. It is exactly the amount of mortar that must be prepared for one pillar. For the screed of two semi-bodies, three pieces of punched tape are required. The length will be 34 cm plus a margin for hardware capture. Get ordinary clamp. I recommend buying a 1.5 meter ribbon with hem. After all, places for screed require reinforcement. A tape meter costs up to 25 rubles. A tape tie requires three bolts, three nuts. There is no sense to buy them. It is better to search for unnecessary technology. But the 8 mm stud and similar bolts need to buy. Since the stud will play the role of supporting the lower crossbar of the fence.It will hold a bar of 40x40 mm. The calculation is as follows: - 4 or 5 cm is sufficient for the protrusion of the stud on the sides of the column at the lower point of the fence. - Since the diameter of the column is 11 cm then, having thought it over, we will divide the meter hairpin into 5 equal parts of 20 cm each. - For 25 pillars, 5 pins 5 meters long are needed at 15 rubles each. Total - 75 rubles. Bolts require two times more than the pillars. Namely 50 pieces. Price for all 250 rubles. We use the simplest mesh with a cell of 40x40 mm and a wire thickness of 3 mm. The cost of a sheet of 1x2 m, which is enough for two pillars, is 95 rubles. We need 13 sheets of mesh. Total 1 235 rubles.

Calculation of concrete for a column

Sand, water, I do not take into account the cost, because it is a common building material. But together with cement and a water-repellent additive, an exact volume calculation is required. After all, you want to save. So buy the optimal amount of bags of cement and the volume of liquid glass, which I recommend as an additive. By the way, in 1 liter of liquid glass 1.5 kg of weight. So, the calculation of the mixture. We need to fill a volume of 9.5 liters. But his weight is not 9.5 kg, but, naturally, more. This is explained by the characteristics of the materials:
  • Concrete: - The brand of concrete we need, B15 (M200). This brand of concrete is used for foundations and columns. What we need. - Liquid concrete.In the characteristics it is indicated by the letter P and a number. The liquid mixture has the great advantages of air exhaust. Its easier to fill. But then more cement is required and the frost resistance rate becomes lower. Therefore, we take the consistency of P3, similar to the porridge of the average liquid. - Cement brand. To not speak for a long time, I use the M400. If you take the M300, then you need more. If M500, then, accordingly, less. In fact, the ratio of 1: 4 is enough. But we do not stop there. - The bulk density of cement. Just weigh a liter of cement. The resulting weight divided by volume. Then multiply by a thousand. The average figure is 1,300 kg / m3. The cost of a bag of cement weighing 50 kg is 325 rubles. The following characteristics are available in the factory: - Frost resistance. The optimal indicator is F150. That is, the column will withstand 150 freezing cycles. You will say that this is not enough. Wait. If you properly do the drainage, the pillar will not get wet and absorb water. Accordingly, the destruction will be delayed for a long time. - Water resistance. Here, the indicator is above the average W8. But who knows what there is with a primer in the spring? - Smoothness of the surface. To add smoothness, add more sand. This also applies to thick reinforcement.Such a solution is easier to penetrate between the valves. - Safety factor. Very complicated stuff. In short, when accurate calculations take a small margin of safety. And it starts with 7%. If the proportions are measured by eye, you should take the upper limit of the stock of 41%. Durability depends on it. We will strive for the smallest coefficient of variation. That is, we will try every time to prepare the same solution. Therefore, we take the value of the safety margin of 9%.
  • Additive: - I use liquid glass in the ratio of one percent of the volume of the column. Of course, they take more. More expensive plasticizers apply. But we save. One percent of 9.5 liters is 95 milliliters. But it is easier to take 100 ml by dividing a liter capacity into 10 equal parts. This means that 25 pillars will require 2.5 liters of liquid glass. One liter bucket costs 85 rubles. In total for three it turns out 255 rubles. If you are undertaking large-scale construction with the use of liquid glass, you need to take a container of 20 or more liters. Since it is cheaper twice.
  • Sand: - Voidness of sand. It is calculated simply. We need to take a bucket of sand and the same volume of water. Pour water into the sand to the brim. And then the formula. How much water is left, divide by the capacity of the bucket. Multiply by 100%.I got 6 l / 15 l * 100% = 40%. - The humidity of the sand. If you have wet sand, you need to calculate the percentage. On this depends the amount of water and further costs. Take 1 kg of raw sand. Dry it. Then weigh it. The formula is as follows: from the weight of wet sand subtract the weight of dry and the second action divided by the weight of wet. An approximate value of 5%. - Smoothness of grains. Close to practical action indicator. The sand from the river is smooth. Kneading with less water is easy. But the disadvantage of such concrete is low strength. Using sand from a quarry with sharp edges will eliminate the problem.
Again. voidness and humidity in the artisanal production interest the most inquisitive. And in industrial conditions cement density, grain size and bulk density of sand, impurities of clay or silt are also taken into account.

Final results

The final proportions and volume, experimentally verified, are as follows:
  • Cement 1 part - 4.5 liters.
  • Sand 2.2 parts - 9.7 liters.
  • Water 0.6 parts - 2,77 l.
  • Liquid glass 0.01 part - 100 ml.
  • In terms of kilograms, other figures are obtained:
  • Cement 1 part - 5,85 kg.
  • Sand 2.2 parts - 12.65 kg.
  • Water 0.5 parts - 2.77 kg.
  • Liquid glass 0.015 parts - 0.15 kg.
B large In practice, proportions are measured by volume.And now let's estimate how much material is needed for 25 pillars:
  • Liquid glass, as mentioned, is 2.5 liters. That is, you need to buy cans.
  • Sand 316 kg or 0.242 m3.
  • Water 69.25 liters.
  • Cement 146 kg. We divide by 50. We get almost three bags of cement with a total cost of 975 rubles.
Of course, you can choose not to carry out preliminary calculations based on the humidity and hollowness of the sand or on the safety margin or fluid of concrete. This information is given for further development. Because the old-fashioned ways do not always lead to success. But high-quality concrete support can compete with the factory.