2) A concrete trial batch was calculated according to ACI method and to comply with the project requirements. The weights calculated per batch were: W required/net) = 2.1 kg, C = 5.9 kg, CA moist = 22.2 kg, FA moist = 16.9 kg While mixing the batch, we noticed that the mixture is a little harsh so the expected slump could not be satisfactory. Therefore, we preferred to add 0.2 kg of water to the batch. After mixing, we measured the volume and the fresh unit weight of concrete: V = 0.018m3, Unit Weight of concrete=2425 kg/m3. The slump obtained was perfect. It is required to calculate the new adjusted proportion in kg/m3 and in site/moist and dry conditions, so as to obtain the suitable workability with the required strength. 6,

2) A concrete trial batch was calculated according to ACI method and to comply with the project requirements. The weights calculated per batch were: W required/net) = 2.1 kg, C = 5.9 kg, CA moist = 22.2 kg, FA moist = 16.9 kg While mixing the batch, we noticed that the mixture is a little harsh so the expected slump could not be satisfactory. Therefore, we preferred to add 0.2 kg of water to the batch. After mixing, we measured the volume and the fresh unit weight of concrete: V = 0.018m3, Unit Weight of concrete=2425 kg/m3. The slump obtained was perfect. It is required to calculate the new adjusted proportion in kg/m3 and in site/moist and dry conditions, so as to obtain the suitable workability with the required strength. 6,

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

Subject: Concrete Technology Q:1 a) For what purpose we use Ultrasonic Pulse velocity test? Also classify the quality of concrete if Ultrasonic Pulse velocity is 3.0km/sec? b) Why and how rebound hammer is used for concrete?
Given the following data:Slump Requirement = 4"Max. Aggregate Size = 1.0"Water/cement Ratio = 0.55Mass of Cement = 350.91kg/m3Mass of the Coarse Aggregates= 1072 kg/m3Total Mass of the Concrete2375 kg/m°Compute for the mass of FineAggregates
a)i. If on-site slump test fails, should engineers allow thw contractor tocontinue the conctreting work, Explain. ii. Deformation occurs on freshly lay concrete when it finally set or hardenCriticize various causes for dimensional changes in the hardened concrete. iii. Explain in detail and with practical examples on water cement ratio and it effect on concrete work.
a. How does one obtain a concrete sample from a batch in accordance with ASTM C172?b. When is it necessary to perform wet sieving according to method C172?c. Test method C143 is applicable to plastic concrete having coarse aggregate up to 37.5 mm in size. Will it be possible to perform slump test if coarse aggregate used is larger than 37.5 mm? How?d. Briefly discuss the procedure for filling up the slump cone with fresh concrete sample.e. Which one among the test methods in determining air content of freshly mixed concrete is most appropriate to determine air content of concretes containing lightweight aggregates?f. What is the purpose of adding alcohol in test method C173?g. When is it necessary to consolidate concrete by vibration in test method C231? Discuss the process of vibration when placing and consolidating the sample.h. When rodding a layer of concrete in method C138, is it okay to hit the bottom of the measure? If not, how is it supposed to be done?i. Calculate the yield of…
Q: a) For what purpose we use Ultrasonic Pulse velocity test? Also classify the quality of concrete if Ultrasonic Pulse velocity is 3.0km/sec? b) Why and how rebound hammer is used for concrete? SIR, PLS GIVE ME PROPER AND CORRECT ANSWER WITH FULL DETAILS. THANKS
The weight of water required for a trial batch is 270 lb/yd^3. If the w/c ratio is 0.55, what is the required amount of concrete?
A heavily reinforced retaining wall is to be constructed and you are asked to design a concrete mixfollowing the ACI methodology. The concrete mix specifications are:o Characteristic compressive strength of 30 N/mm 2 at 28 days.o Failure rate of 1%o Previous control data yielded a standard deviation of 2 N/mm 2o Air-entraining is required for extreme exposureo Minimum cement content 450 kg/m 3o Required slump 160 mmo Maximum aggregate size 10 mmo Fineness modulus of aggregates is 2.90o Dry rodded mass of coarse aggregates is 1650 kg/m 3o Relative density of aggregates: 2.5o Coarse aggregate has 3% moisture.o Fine aggregate has 4% moisture.o Volume of the required trial mix: 18 m 3 Following the ACI step-by-step process estimate the cement content of the mix, the total mix quantities required for this project and Using the ACI volumetric approach, provide the estimated mix quantities for the above specifications and comment on any differences between the mass approached followed in the…
Q: a) why do we need workable concrete? b) What is pozzolanic material; what benefits can be achieved by using Pozzolana with cement in concrete? c) For what purpose we use Ultrasonic Pulse velocity test? Also classify the quality of concrete if Ultrasonic Pulse velocity is 3.0km/sec? SIR, PLS GIVE ME PROPER AND CORRECT ANSWER WITH FULL DETAILS. THANKS SUBJECT: CONCRETE TECHNOLOGY
Design a non-air-entrained concrete mix for a small job with a nominal maxi-mum gravel size of 19 mm. Show the results as follows: a. mass of components to produce 2263 kg of concreteb. volumes of components to produce 1 m3 of concrete
Subject = Concrete technology Q1: Part a) Explain and state visual stability index, if in slump flow test there occurs clear segregation and bleeding of halo greater than 10mm in self compacting concrete? Part b) Propose suitable Methods of finding Workability of Dry, Normal and Self Compacting Concrete ? (Note: Write only names of Experiments)
Design a concrete mix which is already solved by using Eprical Formulas according to TS-EN and compate the results.
what are the effects of the Acid Attack Test, Chloride Attack Test, and Sulphate Attack Test on the performance of geopolymer concrete based GGBS?