6000 psi concrete test report for 7 days

Jul 01, 1981· It must be assumed that a measured strength of 500 psi below that specified represents a deficiency of some sort either in the concrete or in its testing (although it should not be overlooked that such measurements will occur on an average of once or …

6000 psi (41.4 MPa) @ 7 days 7000 psi (48.3 MPa) @ 28 days Pull-out strength, ASTM E4881 21,000 lb-force (9525 kg-force) @ 28 days 1Tested with a 1/2" (12.7 mm) diameter threaded bolt embedded to a depth of 8" (203 mm) in a 2" (51 mm) diameter hole which was bored in concrete with a compressive strength of approximately 4000 psi (27.6 MPa).

3 hours 5000 psi (34.5 MPa) 24 hours 6000 psi (41.4 MPa) 7 days 7000 psi (48.3 MPa) 28 days 9000 psi (62.1 MPa) Slant Shear Bond, ASTM C882 per C928 24 hours 1500 psi (10.3 MPa) 28 days 2500 psi (17.2 MPa) Splitting Tensile, ASTM C496 7 days 700 psi (4.82 MPa) 28 days 880 psi (6.06 MPa) Flexural Strength, ASTM C78 7 days 600 psi (4.14 MPa) 28 ...

• ASTM C78 Standard Test Method for Flexural Strength of Concrete (Using Simple Beam with Third-Point Loading) ... • ACI 506.1R-98 Committee Report on Fiber Reinforced Shotcrete ... 7 days 6000 psi (41.3 MPa) 6900 psi (47.5 MPa) 28 days 8000 psi (55.1 MPa) 9000 psi (62.0 MPa) ...

Oct 12, 2008· At 7-days, it would likely test above the required 28-day strength for a 3000 psi mix. Further, lets assume that the actual 3000 psi mix was slow to gain strength and actually exhibited 7-day strength of 1300 psi and shoring removal was done based on the erroneous, mis-marked compressive strength test.

Property and Test Method Results Compressive Strength ASTM C109 3 Hours 3,500 psi (24.13 MPa) 1 Day 5,000 psi (34.47 MPa) 7 Days 6,000 psi (41.36 MPa) 28 Days 7,000 psi (48.26 MPa) Rate of Set ASTM C266 Working Time :30 Initial:40 Final :55 Length Change ASTM C157 28 Days Air (-)0.04% 28 Days Water (+)0.04% Modulus of Elasticity ASTM C469

View 5.PCC 7 day testing lab Spring 2021 (1).pdf from CIV ENGR 395 at University of Wisconsin. Stiffness and Strength Properties of Concrete CEE 395 – Materials for Constructed Facilities Spring

Mar 01, 2003· Publication: Concrete International. Volume: 25. Issue: 3. Appears on pages(s): 132. Keywords: Date: 3/1/2003. Abstract: We test concrete cylinders for compressive strength. Most specifications that we see require a compressive strength of 3000 psi (20.7 MPa) and testing at 7 and 28 days.

Answer: Higher psi concrete will resist cracking more but without addressing the cause of the stress cracks sooner or later the cracks will appear. Addressing cracking in concrete slabs is done long before the mix is poured. Cracking is a direct result of the sub grade settling in certain areas ...

Typical properties of normal strength Portland cement concrete: Density : 2240 - 2400 kg/m 3 (140 - 150 lb/ft 3 ) Compressive strength : 20 - 40 MPa (3000 - 6000 psi = 432 - 864 ksf) Compressive strength of concrete (% of 28-day strength) vs age (days) Flexural strength : 3 - 5 MPa (400 - 700 psi = 57.6 - …

The concrete ticket below shows a 3500 psi concrete mix for 10.5 yards of concrete. The ticket breaks down the weights of the amount of cement, stone, and sand used to make the 3500 psi concrete. The actual weights used to make this 10.5 yard load were: 1. Cement = 5,805 pounds. 2.

days 2 3 4 7 days 5 6 7 28 days 8 9 Table 1 : Recordings during Compressive Test on Concrete 6. Calculation The measured compressive strength of the cubes shall be calculated by divid ing the maximum load applied to the cubes during the test by the …

Table C.4 Creep Plus Shrinkage Data for 6000 psi Cylinder #2 Loaded at 7 Days ... Figure 3.6 Compressive Strengths of 8000 psi Concrete Mixes..... 44 Figure 3.7 Test Setup for Modulus of Elasticity..... 46 Figure 3.8 Modulus of Elasticity for 6000 psi Mixes in First ...

A. According to section 19.2.1.3 of ACI 318-19 the specified compressive strength shall be based on the 28-day test results unless otherwise specified in the construction documents. 3- or 7-day test results are used to monitor early strength gain, especially when high early-strength concrete is used. However, 3- and 7-day test results are not ...

Oct 28, 2013· The American Concrete Institute recognizes 28 days or "the test age designated for determination of the specified compressive strength."5 Therefore, when a specifier calls for 5,000 psi concrete at 28 days, this tells the concrete producer to select a mix design that will attain a minimum of 5,000 psi 28 days after manufacture.

be attained and verified by properly evaluated test results as specified. Some designers specify concrete strengths of 5000 to 6000 psi, or even higher in certain structural elements. Specified strengths in the range of 15,000 to 20,000 psi have been produced for lower-floor columns in high-rise buildings. Very

Compressive strength of M25 concrete after 7 days & 28 days. Generally strength of concrete measured in psi (pound force per square inch in USA) & MPa (mega pascal) in India and other country. MPa in another terms represented as N/mm2. And 1MPa = 145.038 psi. In this topic we have to find compressive strength of M25 concrete, if it achieve strength 25MPa or 3626 Psi by cube test buy …

Aug 24, 2021· The maximum strength gain spike is observed till 14 days, so we test concrete at an intervals of 7 days, 10 days & 14days and If concrete fails to show results of 90% of its overall strength @14 days then that batching is rejected. How to Determine Compressive Strength of Concrete

Table 17-2. Selected Properties of High-Performance Concrete Property Test method Criteria that may be specified High strength ASTM C 39 (AASHTO T 22) 70 to 140 MPa (10,000 to 20,000 psi) at 28 to 91 days High-early compressive strength ASTM C 39 (AASHTO T 22) 20 to 28 MPa (3000 to 4000 psi) at 3 to 12 hours or 1 to 3 days

Mar 31, 2019· The ideal concrete psi for a given project depends on various factors, but the bare minimum for any project usually starts around 2,500 to 3,000 psi. Each concrete structure has a normally acceptable psi range. Concrete footings and slabs on grade typically require a concrete of 3,500 to 4,000 psi. Suspended slabs, beams, and girders (as often ...

industry practices, follow ACI (American Concrete Institute) standards for concrete finishing. QUALITY CONSTRUCTION MATERIALS Test Method - ASTM C39 Independent results provided by Advance Testing * Slump at 9.0" (ASTM C143) COMPRESSIVE STRENGTH TESTS: 3 DAY 6000 psi.* 7 DAY 7000 psi.* 28 DAY 8000+ psi.* TECHNICAL DATA

Maturity testing usually includes for 3 days, 7 days cube strength and 28 days. If required the maturity testing can include longer periods of 60 or 90 days. Further information on measuring the concrete strength at 7 days is included in our Concrete Cube Test post. Concrete Strength Gain Curves

Aug 06, 2017· Currently, 28-day concrete strengths ( f c ′) range from 2500 to 9000 psi, with 3000 to 4000 psi being common for reinforced concrete structures and 5000 to 6000 psi being common for prestressed concrete members. Concretes of much higher strengths have been achieved under laboratory conditions. The curves shown in Figure 1 represent the result of compression tests on 28-day …

28 days, psi concrete concrete 7000 0.33 — 6000 0.41 0.32 5000 0.48 0.40 4000 0.57 0.48 3000 0.68 0.59 2000 0.82 0.74 Table 9-3 (Inch-Pound Units). Relationship Between Water to Cementitious Material Ratio and Compressive Strength of Concrete Strength is based on cylinders moist-cured 28 days in accordance with ASTM C 31 (AASHTO T 23).

Answer (1 of 5): Those are ages at which most concrete compressive test specimens are tested. 1. Those ages are multiples of 7. They represent 1, 2 and 4 weeks respectively. 2. At 28 days, the concrete will have achieved most of the strength that it will achieve in a reasonable time frame. Whils...

If I was an engineer responsible for durable concrete for my project, I would specify: Minimum 28-day Compressive Strength, f'c = 3500 psi o This keeps mix designs submitted to moderate cement content, typically 3500 psi concrete has 564 lbs of cement. The higher the specified strength the more cement is …

Wet Bond Strength to Concrete, psi "Tex-618-J, Testing Elastomeric Concrete" 100 minimum Compressive Strength 24 hr. psi ASTM "C 579, Standard Test Methods for Compressive Strength of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings and Polymer Concretes," Method B 200 minimum Compressive Stress @ 0.1 in., 7 days, psi "Tex-618-J ...

The concrete compressive strength f c and the modulus of elasticity E c were tested according to the Australian Standards AS 1012.9 (1999) and AS 1012.17 (1997), respectively, using a servo-hydraulic testing machine with a range of 3000 kN. In order to obtain more accurate experimental data, the concrete compressive strength and modulus of elasticity were tested on the day of the beam test ...

A 3 or 7-day test may help detect potential problems with concrete quality or testing procedures at the lab but is not a basis for rejecting concrete, with a requirement for 28-day or other age strength. ASTM C 1077 requires that laboratory technicians involved in testing concrete must be certified.

Feb 26, 2021· In normal concrete work, the maximum compressive strength that can possibly be obtained is generally reckoned to be about 7,500 psi for a 28-day cylinder. The limit at the moment seems to be 16,000 psi, although this can be obtained only under laboratory conditions.