slump test Table 2: Slump testGrade of concreteSlump (mm)RemarkTrue slumpTrue slumpG2060G2530a) How would you define workability?b) What is slump loss and why does workability decrease with time?c) What are the principle components of workability and their significance inconcrete construction practice?d) Calculate the approximate volume of concrete required for slump test asshown in Table 2e) Determine the degree of workability of both grades of concrete base on theslump test result.f) With appropriate of diagram, explain the meaning of true slumpg) Why G25 concrete has a lower slump than G20 concrete. Explain the factoraffecting.h) Suggest the appropriate application of both types of concrete according totheir slump results.Table 3: Compacting Factor TestWeight of concrete (kg)Grade of concretePartial compactedFully compactedG2015.316.1G2514.316.1a) Determine the workability factor using the compacting factor formula for bothgrades of concrete.b) Calculate the approximate volume of concrete required for compactingfactor test as shown in Table 2c) Determine the degree of workability of the two grades of concrete base onthe compacting factor test result.d) Define the following phenomena and significance and factor affecting them:segregation and bleeding (please explain with an appropriate picture ordiagram)?e) Discuss the measures that can reduce the bleeding of concrete. Table 4: Density of hardened concreteGrade ofSpecimenMass of specimens (g)concrete7 days14 days28 daysAirWaterAirWaterAirWaterG20A1244313982463141224741421A2245814082447140424781424АЗ237713622561147024671418G25B1243414012485143224141393B2245314132471142523471356B3244714102487143524601425a) Calculate the density (convert into kg/m2) of all concrete specimensb) Determine the mean density of specimens for respective curing agesc) Plot the graph to show the density of both types of concrete at various curingagesd) Make comparison on the development of density of both grades of concreteTable 5: Compressive strengthGrade ofSpecimenMaximum load (kN)concrete14 days7 days133.028 daysG20A1161.0198.0A2130.0158.0195.0АЗ145.0172.0203.0G25B1170.0204.0252.0B2162.0193.0241.0B3181.0225.0263.0a) Calculate the compressive strength (convert into N/mm?) of all concretespecimensb) Determine the mean compressive strength of specimens for respective curingagesc) Plot the graph to show the compressive strength of both types of specimens atvarious curing agesd) Make comparison on the development of strength rate of both types ofconcretee) Discuss the effects of curing age in development of compressive strength ofconcretef) With using appropriate chart, explain the relationship between density ofconcrete and compressive strength for both G20 and G25 concrete

a.) Workability Workability is a property of raw or fresh concrete mixture. In simple words,…

Table 2: Slump test Grade of concrete Slump (mm) Remark True slump True slump G20 60 G25 30 a) How would you define workability? b) What is slump loss and why does workability decrease with time? c) What are the principle components of workability and their significance in concrete construction practice?

Table 2: Slump test Grade of concrete Slump (mm) Remark True slump True slump G20 60 G25 30 a) How would you define workability? b) What is slump loss and why does workability decrease with time? c) What are the principle components of workability and their significance in concrete construction practice?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concrete Compressive Strength test Discussion: 1.Why did you use three samples?2. What changes do you need to apply if you were to use three standard cube samples instead?(reference needed)3. According to the relevant Australian Standards, what is the acceptable tolerance for yourtarget strength and target workability? (reference the standard clause you have used to answer the question). In what range should the values of your compressive test and slumpresults be to be deemed acceptable?
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ANSWERS SHOULD BE Answer Key 10) 0.69 m3 11) 36.8 kN 12) 11.6 kN
CONCRETE TECHNOLOGY// THEORY PART.
What is the compressive strength of Concrete if a 6" cylindrical sample was tested in UTM and failed at 640 kN load? о 35 MPа о 28.5 MPа o 28 MPa o 30 MPa
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In a ready mixed concrete plant, 28 days compressive strength results of 16-cylinder specimens were determined as follows. According to ASTM C94 Ready mixed concrete standard and the given data, what should the minimum average compressive strength to be achieved for a concrete class of C30? Specimen # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Compressive Strength (MPa) 36 36 35 32 33 30 30 34 33 30 36 36 29 36 34 34 O a. 33.38 MPa O b. 37.22 MPa Oc 30 MPa O d. 33.84 MPa Oe. 37 MPa
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