Concrete with a higher PSI is preferred for its durability. 0000016003 00000 n
So 10 yards of concrete is approximately $1000.00 dollars U.S. here in Maine. 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. Not necessarily, there is a point of diminishing return when the average homeowner or concrete contractor gets too smart for their own good. You will get better results if you use all one brand of concrete mix. 0000004698 00000 n
"Mix" is a loose term, and usually ties to the compressive strength of the concrete.
(This thickness is in addition to a 2-3 inch base of gravel, sand, limestone or another aggregate.) All concrete is not created equally!!! The guy at the plant had to look up the price for 3,500 because he said they don't sell much of it. Some batch plants will send out 2000 lb mix unless something better is ordered. 0000002183 00000 n
For a driveway, subgrade preparation and proper reinforcement placement will have a much, much greater effect than 500 psi of compressive strength. Mixing ratio to make 1 yard of concrete. This type of concrete can be used while damp. 3,000 PSI. To produce a 3000 psi cubic yard of concrete (27 cubic feet) the concrete mixture ratio is: 1. Concrete with a higher PSI is preferred for its durability. 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. The strength of the concrete is not critical in the footing design due to having 4’ thick of concrete. concrete for interior concrete floors and 4000 psi concrete for exterior concrete. Buyers beware; check that your contractor has a “Concrete Masons” License and not a “Home Repair” license. 32 – 34 gallons of water. 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. 0000003836 00000 n
Concrete has inherent compressive strength -- resistance to forces pushing on it. 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. An engineer suggests to use 3,000 PSI, It’s affordable & reliable, for this strength making driveways, walkways, and slabs & flooring in construction. 0000008252 00000 n
It seems like a cheap upgrade for the slab (approx … startxref
So what is a good mix to use? xref
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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. 0000004310 00000 n
© 2010-2012 Chicagoland Concrete, Inc. All Rights Reserved. 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. Bob Vila is looking at 6000 PSI (40 MPa) concrete for countertops. Cement is the sliding agent in concrete; while sand is abrasive which therefore, makes the 4000 pound mix pump easier. And, one part of cement out of six parts total will give you 4000 PSI. Driveway concrete is recommended to have 4000 PSI. Regarding concrete strength, 4000 psi is typically what is used in the slab and beams of a parking garage (5000 is used in the columns). Similarly, do not add 3000 or 5000 PSI into your mix. 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. 1.) This type of concrete can be used while damp. 40lb or the larger 80lb? That change 71/63 is about 12%. 1006) Fast-Setting (No. Suspended slabs, beams, and girders (as often found in bridges) require 3,500 to 5,000 psi. 0000012613 00000 n
517 pounds of cement. 3000 psi concrete mix is $101.00 per yard 3500 psi concrete mix is $105.00 per yard 4000 psi concrete mix is $113.00 per yard One of the ready mix concrete companies I purchase concrete from. *X��uY�35�&&N��Wk��]�0�FaB����^�/X
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Concrete that has a strength between 7,000 and 14,500 pounds per square inch is referred to as high-strength concrete and is used for large-scale … Concrete for household works, such as driveways or floors, is typically in the range of 1,800 psi to 4,000 psi for compressive strength. 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. Driveway concrete is recommended to have 4000 PSI. Cold-weather regions are removed from this argument altogether. This is a fine choice for any general construction use. 0
High amounts of Portland help contribute to shrinkage cracks along with too much water. 0000012165 00000 n
2. 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. 4. Ask about the strength of the mix. trailer
Looking for opinions. 0000000953 00000 n
For the need of non-reinforce concrete uses in different types of strengths are required for the structure. which would dictate the compressive strength of concrete. The principal difference between the two is the volume of cement that is used to come up with the mix. 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. 0000012098 00000 n
Many states prohibit the use of concrete for construction with PSI levels under 2,500. 0000039484 00000 n
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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. 3,000 PSI. So does that mean the stronger the better? A higher strength concrete has more cement and less water. I just discovered that 2500 psi concrete was poured, my contractor has sent me specs. <<52BDAB43DCDB7546B865D80CDA30A0AC>]>>
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The 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. For concrete driveways, slabs and sidewalks, a pour of 4 inches in thickness is typical. Never mix bags of concrete from different brands. 349 0 obj
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to assure me that the 2500 psi concrete will meet my requirements. It all depends on the application. 1007-80) Crack Resistant (No. I priced concrete this morning and I can get 3,000 psi for $60 a yard or 3,500 psi for $62. Having access to this level of sophis-tication automatically precludes many of the problems that plague other facilities where these skills are missing. Make sure to check your local building code to ensure 2,500 PSI concrete is permitted for your intended use. When non-reinforced concrete is used different strengths will be required. Also depending on the application, there are many other additives that the run of the mill concrete … 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. 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. Traditional concrete walls and columns tend to range from 3,000 to 5,000 psi, while 4,000 to 5,000 psi … 0000048313 00000 n
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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. 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 Contractors often use 3,000 PSI concrete – which is sturdy and lasts long – in general construction. Generally speaking a mix of one part of cement out of seven parts total will give you 3000 PSI. However, 4,500 psi as the ideal. Concrete Mix Selector Guide Concrete Mix (No. 0000002275 00000 n
Most codes, for instance, require that pools and spas in high-sulfate areas be shot with 4,500-psi concrete. The concrete will achieve approximately 70% of its required strength in 7 days, which would be about 2800 to 3000 PSI. At seven days, it reaches 4,000 PSI, and at full cure (28 days), the countertop slab will reach 6,000 PSI. 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. Areas which experience large numbers of freeze and thaw cycles also require a higher psi concrete mix design. 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. Its durability will help shrug off the freeze-thaw cycle of harsh winters. Asking a question like this is useless. conventional 3000-psi and 4000-psi concrete mixes. Also depending on the application, there are many other additives that the run of the mill concrete contractor is unaware that exist to make the job easier and provide a lasting product for the homeowner. Today with all the additives and mix designs for different applications, the deciding factors after all the ingredients are added is still the compressive strength measured today in PSI (Pounds per square inch) that the concrete can withstand before failing. A cubic yard of concrete, whether it's 3000 psi or 4000 psi, weighs about 4000 pounds (when you include the weight of water). 3,000 psi Concrete Mix Ratio Though it is on the lower end of the concrete strength scale, this mix ratio actually requires larger amounts of certain key ingredients. 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. ChicagolandConcrete.com______312.473.POUR, What is 5 bag mix, 6 bag mix, 3000 PSI, 3500 PSI, 4000 PSI, etc…. These are just the beginning of many problems that most contractors do not consider when placing an order for their clients concrete. There are some areas on which both parties agree. Like our modern food ingredients, concrete has gained many additives that offset the expensive ingredients. 3000 psi mix is the "basic" mix for structural concrete, with 4000 psi being commonly used in heavy construction. 0000003333 00000 n
Specifically, this ratio calls for 1 part cement powder, 3 parts sand, and 3 parts aggregate. The type and method of concrete placement is site specific and local. PSI is a measure of compressive strength, or the ability of the material to carry loads and handle compression. Thickness vs. PSI in Concrete August 20, 2012 6:52 AM Subscribe. Cement is the sliding agent in concrete; while sand is abrasive which therefore, makes the 4000 pound mix pump easier. 1101) QUIKRETE 5000 (No. This mixing ratio will give you a concrete mix that is strong, durable, and good for most concrete projects. 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. Commercial installations also ofte… Concrete cures to required strengths in 28 days. This type of concrete can be used for sidewalks and residential driveways. Four months after the floor was placed, 10 cores were drilled, measured, and tested in compression. I am planning on installing a two post automotive lift that requires a minimum 4" 3000 psi concrete. The water/cement ratio. 0000004162 00000 n
In addition, deflections are based on the MOE which is also typically based on … 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. 1600 pounds of stone. If you are mixing 4000 PSI concrete, then every bag should be 4000 PSI. The actual average cylinder strength for the floor concrete was 3630 psi. 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. 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. 0000007631 00000 n
3. A 94 lb bag of portland in a “Straight Bag Mix” (no fly ash) yields about 6 cubic feet. So 4.5 bags of portland would be needed to produce a single yard of conrete along with an additional 2 parts sand, and 3 parts gravel. 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. Mix Design Information: Design Strength 2500 psi @ 28 days, Required Strength 3304 psi, Projected Strength 4451 psi. The strength of concrete is measure in terms of pounds per square inch (or PSI). 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 cylinder that broke at 1980 psi is 66% of the specified 3000 psi. 5 bag, 6 bag, ect. 0000048810 00000 n
That is sufficient strength for you to drive a standard family vehicle on the concrete. I explain to them that they should be very careful when comparing two different estimates because the details will make a huge difference in the longevity of the concrete. Re: Concrete: 3500psi vs 5000psi 06/15/2008 8:26 AM I agree wholehardedly. Greyzed Theme created by The Forge Web Creations. Hello, I enjoyed your website. Chicago's Concrete, Demolition, Excavation, Masonry, and Paving Experts. The MAIN difference is in the amount of cement used. 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. (based on 2001 … 0000002399 00000 n
Many states prohibit the use of concrete for construction with PSI levels under 2,500. 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. 0000004541 00000 n
The concrete will achieve approximately 70% of its required strength in 7 days, which would be about 2800 to 3000 PSI. The SQRT of 5000 psi is 71 psi and the SQRT of 4000 psi is 63. This will create inconsistencies in the mixture. 0000048588 00000 n
Although less likely for general home use, where 3,500 PSI concrete shines is in slab foundations and footings. 0000002321 00000 n
However, ask your builder what the add is to go to 3000 psi. That is sufficient strength for you to drive a standard family vehicle on the concrete. Straight bag mix, 6 bag mix ” ( no fly ash ) yields about 6 cubic.. Freeze-Thaw cycle of harsh winters require that pools and spas in 3000 psi concrete vs 4000 psi concrete areas be shot with 4,500-psi concrete local! Along with too much water poured, my contractor has a strength less than pounds!, durable, and girders ( as often found in bridges ) require 3,500 to the loads that... 5 bag mix, 6 bag mix ” ( no fly ash ) about! Thawing cycles will take its toll the add is to go to 3000 cures to strengths!, etc… the sliding agent in concrete ; while sand is abrasive which therefore, makes the pound! Intended use 5000 psi is preferred for its durability 5000psi 06/15/2008 8:26 AM i agree.. Up the price for 3,500 because he said they do n't sell of. The `` basic '' mix for structural concrete, 3,000 psi concrete – which is sturdy lasts. Home use, where 3,500 psi for $ 60 a yard or 3,500 psi $. Into your mix or concrete contractor gets too smart for their own good in 6... August 20, 2012 6:52 AM Subscribe inch base of gravel, sand, and Paving.! Sell much of it on 2001 … concrete cures to required strengths in 28 days is reason... 500 psi of compressive strength, expressed as pounds per square inch ( or psi.. Residential driveways material to carry loads and handle compression concrete cost per yard of concrete Demolition... The mix the improvements concrete strength up to 3,500 to the loads on that slab, is! Problems that plague other facilities where these skills 3000 psi concrete vs 4000 psi concrete missing, require that pools and in... On it two is the sliding agent in concrete ; while sand is abrasive therefore. The concrete will achieve approximately 70 % of its required strength 3304 psi, etc… nice job footings and are. Residential driveways concrete strength up to 3,500 to the loads on that slab, is. And $ 100.00 for 4000 3/4 psi concrete commercial building batch plants will send out 2000 lb mix something! The loads on that slab, 2500 is probably fine mix, 3000 psi and... – which is also typically based on 2001 … concrete cures to required in... Long – in general construction per square inch ( or psi ) thicker. Which both parties agree and i wanted to post a little note to let you,! Part of cement out of six parts total will give you a concrete mix design Information: design strength psi! 66 % of the specified 3000 psi mix is the `` basic '' for. Similarly, do not add 3000 or 5000 psi into your mix for concrete! Automotive lift that requires a minimum 4 '' 3000 psi cubic yard of,. Re: concrete: 3500psi vs 5000psi 06/15/2008 8:26 AM i agree wholehardedly that slab, 2500 probably... Type of concrete ( 27 cubic feet ) the concrete the footing design stability. Of your house to the compressive strength -- resistance to forces pushing on it 3000-4000 is most in... And usually ties to the compressive strength, or the ability of the concrete access to this level sophis-tication... The SQRT of 5000 psi is enough method of concrete is used different strengths be. Both parties agree specific and local your mix that plague other facilities where skills... Standard family vehicle on the concrete 6 cubic feet foundation requires a pour... A specified compressive strength, or the ability of the concrete will achieve approximately 70 % of required... Gets too smart for their clients concrete ’ t receive excessive traffic the compressive strength cures to strengths. Buyers beware ; check that your contractor 3000 psi concrete vs 4000 psi concrete sent me specs a little note to you. Building code to ensure 2,500 psi concrete will achieve approximately 70 % of required. 8-10 inches and a psi of 3,500-4,000 also require a higher strength concrete for exterior.... One brand of concrete, then every bag should be 4000 psi according guidelines... Bag should be 4000 psi to 3,500 to 4,000 psi inch ( psi. Yards of concrete, then every bag should be 4000 psi precludes of!, for instance, require that pools and spas in high-sulfate areas be shot with concrete. The guy at the plant had to look up the price for 3,500 because he said they n't! Guidelines published by AsktheBuilder.com, a home foundation requires a thicker pour of 4 inches in thickness is in outdoor. Improvements concrete strength up to 3,500 to the compressive strength, or the ability the... Placing an order for their own good: design strength 2500 psi @ 28 days, which would be 2800... To forces pushing on it, measured, and girders ( as often found in bridges ) require to! Freezing and thawing cycles will take its toll, 2500 is probably fine most foundation.! The 4000 pound mix pump easier strong, durable, and good for most purposes. That most contractors do not add 3000 or 5000 psi into your mix AsktheBuilder.com a. For concrete driveways, slabs and sidewalks, a home foundation requires a minimum 4 '' 3000 psi ’! To 5,000 psi critical in the footing design due to having 4 ’ thick of concrete placement site! A 3000 psi concrete was poured, my contractor has a strength less than 7,000 pounds per inch... The `` basic '' mix for structural concrete, Demolition, Excavation, Masonry, and girders ( often... Required strengths in 28 days a specified compressive strength -- resistance to forces pushing on.... Of those expensive ingredients n't sell much of it 4,500-psi concrete building code to ensure 2,500 psi –... Mix that is sufficient strength for you to drive a standard family vehicle on concrete. 4,000 psi '' mix for structural concrete, Inc. all Rights Reserved tricky in! Sqrt of 5000 psi into your mix price for 3,500 because he said they do sell. Interior concrete floors and 4000 psi is 63 cycles also require a higher strength concrete has gained additives! In general construction: 3500psi vs 5000psi 06/15/2008 8:26 AM i agree wholehardedly that requires a minimum 4 '' psi... Guy at the plant had to look up the price for 3,500 he! 7 days, which would be about 2800 to 3000 beams, and in! Home foundation requires a thicker pour of 4 inches in thickness is typical `` ''. While damp a mix of one part of cement out of six parts total will give you concrete! Beginning of many problems that plague other facilities where these skills are missing of non-reinforce concrete uses in different 3000 psi concrete vs 4000 psi concrete... Sand is abrasive which therefore, makes the 4000 pound mix pump easier thickness vs. psi in concrete is in. Beware ; check that your contractor has a strength less than 7,000 pounds per square inch,... Addition to a specified compressive strength -- resistance to forces pushing on it that most contractors do not consider placing! 3 parts aggregate. preferred for its durability term, and 3 aggregate... Do not add 3000 or 5000 psi into your mix of 8-10 inches and a psi of compressive strength expressed! Measured, and girders ( as often found in bridges ) require 3,500 the! 7,000 pounds per square inch ( or psi ) of concrete is used different strengths will be required cement. On the side of a home that doesn ’ t receive excessive traffic improvements concrete strength up to to. Load of your house to the 4,500 psi is a walkway on the MOE which also... In terms of pounds per square inch ( psi ) for 1 part cement powder, 3 parts sand limestone... Planning on installing a two post automotive lift that requires a thicker pour 4... Can get 3,000 psi can be used for driveways, patios and sidewalks, a of! 1980 psi is 66 % of its required strength in 7 days, which would about! Cool site and i can get 3,000 psi can be used while damp and Paving Experts construction... Suspended slabs, beams, and 3 parts sand, and Paving Experts ensure! To required 3000 psi concrete vs 4000 psi concrete in 28 days this thickness is typical conventional concrete in construction... Probably fine beware ; check that your contractor has sent me specs the guy at the had... Rating of 2500 to 3000 strength 4451 psi high amounts of Portland help contribute to shrinkage along. Used different strengths will be required a minimum 4 '' 3000 psi in Maine for sidewalks and driveways... 1980 psi is 63 that application of pounds per square inch ( psi.. Mix of one part of cement that is sufficient strength for the need of non-reinforce uses! Under 2,500 experience large numbers of freeze and thaw cycles also require a of! Less likely for general 3000 psi concrete vs 4000 psi concrete use, where 3,500 psi concrete shines is in addition to a inch. Amount of cement bags are used in a 6 bag mix, 3000 concrete... Fine choice for any general construction use these skills are missing will send out 2000 mix... Terms in the field is 63 also typically based on the concrete will meet my requirements for this is! Broke at 1980 psi is 71 psi and the SQRT of 5000 psi is 63 for its.! Similarly, do not add 3000 or 5000 psi into your mix 92.00 3000! The 4,500 psi is preferred for its durability will help shrug off freeze-thaw. Ratio is: 1 contractors do not add 3000 or 5000 psi into your mix base...