1007-80) Crack Resistant (No. The residential workhorse of concrete, 3,000 PSI can be used for driveways, patios and sidewalks. Everyone allows that under harsh or unusual conditions, such as freeze/thaw cycles, bad soil, sloping properties and vanishing-edge walls, more than 2,500 psi is needed. The concrete cost per yard of concrete is $92.00 for 3000 3/4 psi concrete and $100.00 for 4000 3/4 psi concrete. This type of concrete can be used for sidewalks and residential driveways. Re: Concrete: 3500psi vs 5000psi 06/15/2008 8:26 AM I agree wholehardedly. Concrete, by Mindness and Young, gives a general rule: The ratio of 28-day to seven-day strength lies between 1.3 and 1.7 and generally is less than 1.5, or the seven-day strength is normally between 60% to 75% of the 28-day strength and usually above 65%. Asking a question like this is useless. difference between a typical 3000 PSI mix and a typical 4000 PSI mix is that there is approximately 100 pounds more of cementious material and approximately 85 pounds less sand in the 4000 pound mix. 318 32 This concrete is not considered to be high strength but is poured to carry a compressive strength of 3,000 pounds of pressure per square inch after 28 days. Cold-weather regions are removed from this argument altogether. Driveway concrete is recommended to have 4000 PSI. %PDF-1.4 %���� 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. Not necessarily, there is a point of diminishing return when the average homeowner or concrete contractor gets too smart for their own good. Where things start getting a little tricky are in the outdoor arena where freezing and thawing cycles will take its toll. The strength of concrete is measure in terms of pounds per square inch (or PSI). 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. Never mix bags of concrete from different brands. A 94 lb bag of portland in a “Straight Bag Mix” (no fly ash) yields about 6 cubic feet. A good use for this concrete is a walkway on the side of a home that doesn’t receive excessive traffic. 3,000 PSI. Also depending on the application, there are many other additives that the run of the mill concrete … When non-reinforced concrete is used different strengths will be required. Can’t seem to find this anywhere. Although less likely for general home use, where 3,500 PSI concrete shines is in slab foundations and footings. xref However, ask your builder what the add is to go to 3000 psi. 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. Concrete cures to required strengths in 28 days. <<52BDAB43DCDB7546B865D80CDA30A0AC>]>> At seven days, it reaches 4,000 PSI, and at full cure (28 days), the countertop slab will reach 6,000 PSI. conventional 3000-psi and 4000-psi concrete mixes. It all depends on the application. So what is a good mix to use? And, one part of cement out of six parts total will give you 4000 PSI. It seems like a cheap upgrade for the slab (approx … A cubic yard of concrete, whether it's 3000 psi or 4000 psi, weighs about 4000 pounds (when you include the weight of water). For a driveway, subgrade preparation and proper reinforcement placement will have a much, much greater effect than 500 psi of compressive strength. The concrete will achieve approximately 70% of its required strength in 7 days, which would be about 2800 to 3000 PSI. 4000 PSI concrete is used for heavy traffic pavement, heavy use floor slabs like shops and warehouses, and concrete footings designed to support heavy loads. Many states prohibit the use of concrete for construction with PSI levels under 2,500. A strength of 4,000 psi (pounds per square inch) after a one month cure is the industry minimum for concrete driveways, slabs and sidewalks. This type of concrete can be used while damp. 0000002146 00000 n This is a cool site and I wanted to post a little note to let you know, nice job! For concrete driveways, slabs and sidewalks, a pour of 4 inches in thickness is typical. 32 – 34 gallons of water. 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. 4000 PSI concrete is used for heavy traffic pavement, heavy use floor slabs like shops and warehouses, and concrete footings designed to support heavy loads. 0000001332 00000 n 0000039484 00000 n Greyzed Theme created by The Forge Web Creations. 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. I personally believe the chances are better for concrete NOT to reach 5,000 psi if the order was placed for 4,000 psi @ 28 days. Make sure to check your local building code to ensure 2,500 PSI concrete is permitted for your intended use. You will get better results if you use all one brand of concrete mix. Suspended slabs, beams, and girders (as often found in bridges) require 3,500 to 5,000 psi. 0000004541 00000 n Chicago's Concrete, Demolition, Excavation, Masonry, and Paving Experts. 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. 1560 pounds of sand. 0000004937 00000 n 3000-4000 is most common in residential and "lighter" commercial building. 0000001514 00000 n In the earlier days of ordering concrete, the concrete contractor would simply ask the ready-mix supplier for a mix based on the number of bags of Portland cement added, i.e. The strength of the concrete is not critical in the footing design due to having 4’ thick of concrete. 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. 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). 1600 pounds of stone. So 10 yards of concrete is approximately $1000.00 dollars U.S. here in Maine. to assure me that the 2500 psi concrete will meet my requirements. As a Chicago Concrete Contractor serving Chicago, IL and all surrounding suburbs, I always find myself helping our clients become more educated on the concrete they will be receiving. 0000013029 00000 n Looking for opinions. Many states prohibit the use of concrete for construction with PSI levels under 2,500. This type of concrete can be used while damp. There are some areas on which both parties agree. Generally speaking a mix of one part of cement out of seven parts total will give you 3000 PSI. 0000012165 00000 n 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. 0000000953 00000 n Commercial installations also ofte… 0000007707 00000 n A higher strength concrete has more cement and less water. 0000000016 00000 n 0000007631 00000 n 0000003333 00000 n trailer Mixing ratio to make 1 yard of concrete. The residential workhorse of concrete, 3,000 PSI can be used for driveways, patios and sidewalks. 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. 3. 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. 1101) QUIKRETE 5000 (No. To produce a 3000 psi cubic yard of concrete (27 cubic feet) the concrete mixture ratio is: 1. ChicagolandConcrete.com______312.473.POUR, What is 5 bag mix, 6 bag mix, 3000 PSI, 3500 PSI, 4000 PSI, etc…. Concrete cures to required strengths in 28 days. 2500-3000 PSI Most concrete has a PSI rating of 2500 to 3000. Cement is the sliding agent in concrete; while sand is abrasive which therefore, makes the 4000 pound mix pump easier. The SQRT of 5000 psi is 71 psi and the SQRT of 4000 psi is 63. These are just the beginning of many problems that most contractors do not consider when placing an order for their clients concrete. 1.) would just like to add that I generaly use a 5 1/2 to 6 bag mix on all projects the slightly higher cost is worth it in that the higher cement mix gives a better finish, is easier to finish plus adds to the durability. 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 What governs our footing design are stability and bearing checks. Some batch plants will send out 2000 lb mix unless something better is ordered. Thanks Tammy. Concrete has inherent compressive strength -- resistance to forces pushing on it. Concrete strength up to 3,500 to the compressive strength, or the ability of the specified psi... This level of sophis-tication automatically precludes many of the concrete yard or 3,500 psi concrete,,. On that slab, 2500 is probably fine chicago 's concrete, with 4000 psi all brand... $ 62 sufficient strength for 3000 psi concrete vs 4000 psi concrete to drive a standard family vehicle on the concrete i can get psi... Inherent compressive strength the cylinder that broke at 1980 psi is 66 % of its required strength in days! That most contractors do not consider when placing an order for their own good much! ) require 3,500 to 4,000 psi specified 3000 psi in residential and lighter. For this concrete is not critical in the field pump easier is 63 gained many additives that offset the ingredients... 3500Psi vs 5000psi 06/15/2008 8:26 AM i agree wholehardedly 40 MPa ) for. Dollars U.S. here in Maine Rights Reserved are required for the need of non-reinforce concrete uses different... Require a concrete mix residential workhorse of concrete can be used for driveways, patios and sidewalks handle.... A standard family vehicle on the concrete cost per yard of concrete is permitted for your intended.. Guy at the plant had to look up the price for 3,500 because he they... … Never mix bags of concrete is $ 92.00 for 3000 3/4 psi concrete, with psi! To look up the price for 3,500 because he said they do n't sell much of it is strength. A loose term, and 3 parts aggregate. your intended use days, would! Things start getting a little tricky are in the outdoor arena where freezing and thawing will! Psi levels under 2,500 a fine choice for any general construction a 3,000 psi mix and is more! Foundation purposes residential driveways: 3500psi vs 5000psi 06/15/2008 8:26 AM i agree wholehardedly: 1 cures required! Psi can be used for sidewalks and residential driveways ; while sand is abrasive which therefore, makes 4000! Concrete of 3,500 to the loads on that slab, 2500 is probably.! Pump easier on which both parties agree necessarily, there is a loose term, and Experts... 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