In order to estimate in-situ compressive strength, Rebound Hammer test is applied on a concrete shear wall. The following eleven Rebound numbers are measured.Estimate the compressive strength of the concrete in terms of cylindrical strength. (Use the related charts provided atRebound Numbers:413842O a. 35 kgf/cm²O b. 40 MPaO c. 440 kgf/cm²O d. 35 MPaO e. 28 MPa39 37443840433840 Rm CYLINDER COMPRESSION STRENGTH CAGE OF CONCRETE 14 TO 56 DAYS)Rm = RESISTANCE A LA COMPRESSION SUR LE CYLINDRE CAGE DU BETON 14 A 56 JOURS)(BETONAL TER 14 BIS 56 TAGE)Rm = ZYLINDERDRUCKFESTIGKEITfc' = RESISTANCE A LA COMPRESSION SUR LE CYLINDRE CAGE DU BETON 14 A 56 JOURSfc' = CYLINDER COMPRESSION STRENGTH CAGE OF CONCRETE 14 TO 36 DAYS)fc' =(BETONALTER 14 BIS 56 TAGE)ZYLINDERDRUCKFESTIGKEITBETON 14 A SG JOURS)14 BIS 56 TAGDCBETONALTERCURE CAGE DUIRm = CUBE COMPRESSION STRENGTH CAGE OF CONCRETE 14 TO 56 DAYS)RM = RESISTANCE A LA COMPRESSION SUR CUBE CAGE DUWURFELDRUCKFESTIGKEITRMCLASSIC CONCRETE HAMMER GRAPHICS60504030205 N/mm²108500800070006000500040003000مي402000150070605040302010202020AApos.pos.Apos.2530354045B = HAMMER REBOUND / DURETE A CHOC / PRELLHARTEpos. Bpos. Apos. Cpos. B.B25303540B = HAMMER REBOUND / DURETE A CHOCpos.pos.English-ВB25303540B = HAMMER REBOUND / DURETE A CHOCUSE-10-45504550PRELLHARTE50PRELLHARTE556125094085530620422/510255CECE714612509408306kg/cm²204102CE14 BIS 56 TAGERm = CUBE COMPRESSION STRENGTH (AGE OF CONCRETE 14 TO 56 DAYS)Rm = RESISTANCE A LA COMPRESSION SUR CUBE (AGE DU BETON 14 A 56 JOURS)Rm = WURFELDRUCKFESTIGKEIT(BETONALTERRm RESISTANCE A LA COMPRESSION SUR LE CYLINDRE (AGE DU BETON 14 A 56 JOURS)Rm CYLINDER COMPRESSION STRENGTH (AGE OF CONCRETE 14 TO 56 DAYS)Rm ZYLINDERDRUCKFESTIGKEIT (BETONALTER 14 BIS 56 TAGE)N/mm²N/mm²706050403020101560504030201015BROCKS MODEL GRAPHICSXPos.XBpos. A2030354045B = HAMMER REBOUND / DURETE A CHOC / PRELLHARTE112=pos. Cpos. B20pos. A25pos.English25B30354540HAMMER REBOUND / DURETE A CHOC / PRELLHARTEUSE714- 11 -61251040830620410250Kg/cm²CE8702725258024351290150psi1450We have executed a lot of tests with the hammeron a series of cubic specimens.The very same cubic specimens have also beentested by using a compression machine.The curves on the diagrams are the result of thecomparison between the two groups of values.The specimens employed for the tests have beenmade using concrete formed by: sand, gravel andPortland cement, ageing from 14 and 56 days.Specimens made with different materials (whichare not the ones traditionally used for the con-CE

In order to estimate in-situ compressive strength, Rebound Hammer test is applied on a concrete shear wall. The following eleven Rebound numbers are measured. Estimate the compressive strength of the concrete in terms of cylindrical strength. (Use the related charts provided at Rebound Numbers: 42 41 38 Ⓒa. 35 kgf/cm² Ob. 40 MPa O c. 440 kgf/cm² O d. 35 MPa Oe. 28 MPa 39 37 44 38 40 43 38 40

In order to estimate in-situ compressive strength, Rebound Hammer test is applied on a concrete shear wall. The following eleven Rebound numbers are measured. Estimate the compressive strength of the concrete in terms of cylindrical strength. (Use the related charts provided at Rebound Numbers: 42 41 38 Ⓒa. 35 kgf/cm² Ob. 40 MPa O c. 440 kgf/cm² O d. 35 MPa Oe. 28 MPa 39 37 44 38 40 43 38 40

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A concrete slab of size 4.5 m x 2.5 m is subjected to wheel load 4000 kg with the tyre pressure of 5 kg/cm2. Determine the warping stress at the corner using the following given parameters. Elastic modulus of concrete = 2.8 x 105 kg/cm2 Thickness of concrete slab = 30 cm Effective modulus of subgrade reaction = 8 x 106 kg/m3 Poisson's ratio of concrete = 0.15 Poisson's ratio of subgrade = 0.25 Thermal coefficient of concrete = 10 x 10-6/°c Temperature difference = 12°C
Please show all written work, thank you
Example 14.12 A prestressed rectangular concrete beam of size 150 x 450 mm is prestressed by 5 wires of 6 mm diameter located at an eccentricity of 45 mm. The initial prestress in the wires is 1350 N/mm2. What is the loss of stress in steel due to creep of concrete? Take E = 210 kN/mm², Ec = 35 kN/mm², ultimate creep strain = 41 x 10-6 mm/mm per N/mm², creep coefficient $ = 1.6.
A concrete cylinder sample has a diameter of 6 inches and a height of 12 inches. The maximum load carried by the sample after its failure is 500 KN. Determine the compressive strength of the sample in psi. (use 1lbf = 4.45 N, round-up your answer to the nearest whole number that is divisible by 5, no need for unit)
The cross section of a concrete corner column that is loaded uniformly in compression is shown in the figure. A circular pipe chase cut-outof 10 i n. in diameter r tins t he height of t he co \u m n (see figure).(a) Determine the average compression stress crr in the concrete if the load is equal to 3500 kips.(b) Determine the coordinates x and y{of the point where the resultant load must act in order to produce uniform normal stress in the column.
Problem 2: A uniform concrete slab of total weight 100 kN is to be attached as shown to two rods whose lower ends are on the same level. O Determine the tensile force of the aluminum rod so that the slab will remain ievel. ® Determine the ratio of the area of aluminum rod to the steel rod so that the Steel E=200 GPa L=6m Aluminum E=69 GPa L=4m slab will remain level. Determine the vertical displacement of the concrete slab if the aluminum rod has a cross sectional area of 320 mm?, with the slab remaining at horizontal level. 3 m 6 m m
5/Determine the smallest value of uniform load that will cause a crack for the reinforced concrete beam shown below. Use f= 30 MPa Wer=? 3.6 m- Ø16mm 100 600 100-> 100 200 50
14.) Determine the cracking moment (kn-m) of the given beam. Concrete is normal weight with =1.0 and fc' = 28 MPa. Express your answer in 2 decimal places. Use As = 3 - 36 mm.
QI- A concrete cylindrical specimen 155 mm in diameter and 290 mm long is subjected to compressive loading up to failure. The following data shown in table below are obtained. Draw the stress- strain curve and determine: i) the concrete strength. ii) Initial Tangent Modulus. iii) Modulus of Elasticity. Iv) Secant Modulus at 90% of strength and v) State which type of stress strain behavior is this. Load, kN Deformation, mm×10* (Load - 8x16) (Deformation x 0.5x16) 222.5 103 413.1 206 635.2 324 730.4 378 856.1 432 953.6 486 1080.7 540 1171.2 756 1270.0 1025 1396.3 1395
Plot long-term P (kips) versus A (inches) using a strain range of -0.014 (C) SE,50.003 (T). Include the effect of creep and shrinkage of concrete and relaxation of the prestressing. Modify the stress-strain relationships for the concrete and prestressing as needed. You are given the following values: Þer = 2.2, Esh = -0.55 x 10 and relaxation in strands = 2.1%.
compute for the modulus of ruptiure of the concrete beam sample is 6"x6" and the span length of the beam (support to support) is equivalent to the 3 times the depth of the beam. load applied is 65.5 kN at center. a. 11.6 MPa b. 14.9 MPa c. 12.7 MPa d. 13.1 MPa
What is the concrete stress in the extreme compression fiber (in ksi) if you found the following properties? Ecen = -0.235 x 10³, p = 3.083 x 10 6.yt = 11.2", E = 4,249 ksi. Enter your answer with sign convention of compression as negative.