Never mix bags of concrete from different brands. When making of walls and footings concrete PSI strength, 2,500 is enough could be between, the 4,000 up to 5,000 psi needs for the pavements for construction. 5000 PSI, like the strength used at the Dexter Southfield School, and higher concrete mixes are usually used for specialized construction projects where high impact resistances, very low wear rates, or extreme conditions are expected. Even though the 3000 psi strength of the footing is sufficient in carrying loads, by code we must use the more stringent of what’s required for strength vs durability. All concrete is not created equally!!! Three days after pouring a counter with Countertop Mix, the compressive strength of the slab will achieve resistance equal to 2,000 pounds per square inch (PSI). A cubic yard of concrete, whether it's 3000 psi or 4000 psi, weighs about 4000 pounds (when you include the weight of water). Concrete with a higher PSI is preferred for its durability. The variables would have to be narrowed down a bit in order to say how likely the concrete is to reach 5,000 psi with a designed 4,000 psi mix design. 1600 pounds of stone. 0000012098 00000 n These are just the beginning of many problems that most contractors do not consider when placing an order for their clients concrete. 0000048313 00000 n 3,000 PSI. The specification for the floor of a maintenance building called for a 6-inch slab thickness and concrete with a design compressive strength of 3000 psi. Like our modern food ingredients, concrete has gained many additives that offset the expensive ingredients. The type and method of concrete placement is site specific and local. 0000000016 00000 n Typically, reinforced concrete ranging between 3,500 to 4,000 psi is used on footing and slabs on grade; between 3,500 to 5,000 psi on suspended slabs, beams and girders; and walls and columns normally require between 3,000 to 5,000 psi. That is sufficient strength for you to drive a standard family vehicle on the concrete. Although less likely for general home use, where 3,500 PSI concrete shines is in slab foundations and footings. I priced concrete this morning and I can get 3,000 psi for $60 a yard or 3,500 psi for $62. However, ask your builder what the add is to go to 3000 psi. The typical concrete strength used for a driveway is in the 3000 psi to 4000 psi range, although temperate areas of the country may use lower strengths startxref 0 This will create inconsistencies in the mixture. Generally speaking a mix of one part of cement out of seven parts total will give you 3000 PSI. Then depending on the weather conditions, one might add fiber-mesh and a retarder to help the workability of the concrete and avoid shrinkage cracks. For interior flatwork which is not exposed to freeze thaw cycles, a 3,000 PSI mix without air entrainment should work fine in most cases. Comparing the load of your house to the loads on that slab, 2500 is probably fine. Mix Design Information: Design Strength 2500 psi @ 28 days, Required Strength 3304 psi, Projected Strength 4451 psi. 3000 psi mix is the "basic" mix for structural concrete, with 4000 psi being commonly used in heavy construction. We recommend a 6-1/2 bag mix or 4,000 PSI concrete with a 6-8% air entrainment and low slump in the 3-4“range to avoid Spalling of the surface from the winter. Many states prohibit the use of concrete for construction with PSI levels under 2,500. The actual average cylinder strength for the floor concrete was 3630 psi. 0000002275 00000 n 1101) QUIKRETE 5000 (No. Most codes, for instance, require that pools and spas in high-sulfate areas be shot with 4,500-psi concrete. So what is a good mix to use? 0000048588 00000 n Commercial installations also ofte… According to guidelines published by AsktheBuilder.com, a home foundation requires a thicker pour of 8-10 inches and a psi of 3,500-4,000. Traditional concrete walls and columns tend to range from 3,000 to 5,000 psi, while 4,000 to 5,000 psi … I just discovered that 2500 psi concrete was poured, my contractor has sent me specs. 318 0 obj <> endobj So 10 yards of concrete is approximately $1000.00 dollars U.S. here in Maine. 0000000953 00000 n conventional 3000-psi and 4000-psi concrete mixes. Many states prohibit the use of concrete for construction with PSI levels under 2,500. 0000001773 00000 n So does that mean the stronger the better? Looking for opinions. Similarly, do not add 3000 or 5000 PSI into your mix. Concrete has inherent compressive strength -- resistance to forces pushing on it. I am in the process of replacing my almost 20 year old asphalt driveway with concrete and am looking for some advice on what I should be looking out for when picking a contractor. 0000002146 00000 n That change 71/63 is about 12%. 0000016003 00000 n We recommend a 6-1/2 bag mix or 4,000 PSI concrete with a 6-8% air entrainment and low slump in the 3-4“range to avoid Spalling of the surface from the winter. This type of concrete can be used while damp. The guy at the plant had to look up the price for 3,500 because he said they don't sell much of it. 1.) Cement is the sliding agent in concrete; while sand is abrasive which therefore, makes the 4000 pound mix pump easier. 2. As noted above, there is no way that 3500 PSI un-entrained concrete would be acceptable in some parts of the country while in others 3000 PSI un-reinforced, much less un-entrained is not only acceptable but desirable. <<52BDAB43DCDB7546B865D80CDA30A0AC>]>> There is no reason to get higher strength concrete for that application. Concrete footings and slabs on grade typically require a concrete of 3,500 to 4,000 psi. Bob Vila is looking at 6000 PSI (40 MPa) concrete for countertops. This mixing ratio will give you a concrete mix that is strong, durable, and good for most concrete projects. Greyzed Theme created by The Forge Web Creations. Hello, I enjoyed your website. An engineer suggests to use 3,000 PSI, It’s affordable & reliable, for this strength making driveways, walkways, and slabs & flooring in construction. Specifically, this ratio calls for 1 part cement powder, 3 parts sand, and 3 parts aggregate. 4. 0000048810 00000 n 0000002183 00000 n Cement is the sliding agent in concrete; while sand is abrasive which therefore, makes the 4000 pound mix pump easier. Thickness vs. PSI in Concrete August 20, 2012 6:52 AM Subscribe. 0000002399 00000 n 3,000 PSI. One of those expensive ingredients in concrete is Portland cement. 517 pounds of cement. But, there's 511 pounds of cement used to make 1 yard of 3000 psi concrete and there's 624 pounds of cement used to make 1 yard of 4000 psi concrete. This is a fine choice for any general construction use. A good use for this concrete is a walkway on the side of a home that doesn’t receive excessive traffic. The residential workhorse of concrete, 3,000 PSI can be used for driveways, patios and sidewalks. PSI is a measure of compressive strength, or the ability of the material to carry loads and handle compression. 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