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There is usually no accepted rule of thumb for how to set the spacing of reinforcement in concrete slabs. There are a number of variables that affect the decision on how much space is left, including the maximum load that a concrete slab may bear to support the soil, the diameter of the reinforcement, the possibility of frost heaving of the slab, and whether the slab is on a horizontal slope
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There is usually no accepted rule of thumb for how to set the spacing of reinforcement in concrete slabs. There are a number of variables that affect the decision on how much space is left, including the maximum load that a concrete slab may bear to support the soil, the diameter of the reinforcement, the possibility of frost heaving of the slab, and whether the slab is on a horizontal slope
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January 6, 2001 2006018332 all reinforcement and post tensioning must be lapped within the width of the casting strip. The Contractor shall pay particular attention to whether the engineer requires the edges of the casting strip to be tied together after the tendons are stressed but before the concrete is placed
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On May 21, 2020018332, we allow random cracking of concrete slabs, but the use of reinforcement or welded steel wire reinforcement to control crack width is usually contraction joints
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Is there a general tendency for builders to leave out soil compaction before casting slab foundations, Jim Stewart, October 20, 17, 12:30 yes, soil assessment and reinforcement
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July 7, 2010018332, which is why reinforcement or welded wire mesh is placed in concrete to achieve the required tensile strength for design purposes, and the lane is undoubtedly one of the cases where high tensile strength is required, as it will be stressed over time
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August 3, 2014018332 before the concrete set, I used Henry 208 to wet repair the roof water leakage. I applied a layer of cement on the joint surface of steel columns. You can usually buy 20 gallons per gallon of cement in your hardware store. Now it's actually 9 gallons. Use a discarded bristle brush to make it as thick as possible and let it solidify for a day
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Installation of concrete is a challenging task, each time concrete pouring has different sizes, shapes, colors, finishes and depth of residential projects. Once these items are determined, the steps for placing concrete are relatively always the same in terms of layout preparation and concrete placement
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When you think of concrete floors, the last thing you want your clients to think of is a wet and cold basement floor. One of the reasons why these old basement floors are like this is that there is no steam barrier under them, which provides an easy way for water vapor to migrate from the soil to the floor, ensuring that this cold and humid feeling will never go away
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Of course, in order to ensure that your concrete Lane will maintain a good appearance for many years to come, your lane contractor should follow the following important steps in the installation process: the appearance and long-term performance of your lane are largely dependent on the quality of workmanship and materials
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A major drawback of the use of calcium and many other accelerators is their tendency to degrade or rust. The reinforcement used in concrete may be that there are steel bars on your foundation. I suggest you not.
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To build a lake house, we are worried that our builders forget to place steam barriers before pouring concrete slabs, but before we further study, we want to know how we can obtain objective evidence of barriers
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Shrinkage control joints shrinkage control joints are placed in concrete slabs to control random cracks. Fresh concrete mixtures are a fluid plastic material that can be molded into almost any shape, but volume or shrinkage decreases as the material hardens
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1986018332 since these conditions do not exist in the driveway or parking lot, granular subbase is not required. Therefore, it is recommended that the subgrade should be uniformly compacted in addition to the concrete pavement design, but under the following conditions
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The owners of newly installed concrete are often told by their contractors to seal the concrete, and they usually don't tell them the basic knowledge, such as why they should seal it, the best concrete sealing material, how to use it and the appropriate application. The answers to these questions are not easy to get when you buy sealing materials in a building supply shop or other places
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Expansion joint is one of the important joints used in building, such as roof expansion joint and pavement slab expansion joint. The function of expansion joint is to bear the stress caused by temperature change. Flexible concrete expansion joints can reduce the formation of cracks, but cracks can be achieved by using appropriate concrete seals
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For many years, lime has been used to stabilize roadbeds and air fields, but now lime is also used to stabilize building sites. Lime stabilization is mainly used to improve poor quality clay to provide adequate subgrade support, which is the primary condition for good performance of concrete slabs
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The construction personnel can make the cast-in-place concrete stronger by using steel bars or inserting steel bars in the formwork before the concrete is poured. One of the only real disadvantages of the labor force requirement for cast-in-place concrete is that it requires a lot of labor
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During placement, reinforcement shall be suspended so that there is at least 25 inches of concrete between the first layer of reinforcement and the compacted soil. Ensure that no water is added to the concrete after it reaches the construction site and that no water is spilled on the concrete when the concrete is completed
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September 22, 2009 2007018332 in order to get a better understanding of the 4-foot-thick reinforcement, which is less than 2 feet above the reinforcement, and may fail, which is why if I use reinforcement, the slab must be thicker. This is just my personal experience. There are too many concrete poured to be included
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2014018332 lava basalt reinforcement is becoming more and more popular, because it is twice as strong as steel, does not rust, and lighter basalt reinforcement, like glass fiber, first heats the substrate to the melting point, and then pulls or pushes it through the mold
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When placed in footings, reinforcement shall be completely encased in concrete, at least 3 inches around. When the reinforcement is allowed to extend out of the footing, the reinforcement is susceptible to more rapid corrosion over time, and the reinforcement allowed to corrode into the footing weakens the footing, resulting in areas prone to cracking
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When considering the possibility of building a concrete roof to withstand the storm, it is almost impossible not to think of quoting the classic fairy tale the three piggery, which tells the story of three pig owners who try to stop an evil wolf who happens to have the lungs of a hurricane
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2019018332 before pouring, determine the strategy to be used, including material form test and other requirements schedule, determine cold weather protection measures for concrete mixture, and maintain a clear temperature record sheet
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October 8, 2018018332 in addition to the concrete mix, when to cut concrete and weather conditions determine when to cut concrete depends on the hardness of the concrete and the type of cutting equipment used to make the saw blade cut too early, which is due to the spalling effect of the saw blade pulling the aggregate away from its original position along a random edge of the cut
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