Empirical Equation for Concrete Made With PPC or OPC with Fly Ash by Accelerated Mix Design Method

  • P N Ojha National Council for Cement and Building Materials, India
  • Suresh Kumar National Council for Cement and Building Materials, India
  • Manish Kumar Mandre National Council for Cement and Building Materials, India
  • Piyush Mittal National Council for Cement and Building Materials, India
  • Brijesh Singh National Council for Cement and Building Materials, India
  • Arora V V National Council for Cement and Building Materials, India
DOI: https://doi.org/10.34118/jbms.v8i2.1487

Abstract

Assessment of 28 days strength from accelerated strength (1 day) can be extremely helpful. Early prediction of 28 days compressive strength is required basically for two purposes. First, to finalize the concrete mix proportions in the laboratory and secondly, for quality control purpose during construction. Through this concept designers can easily identify the uncalculated errors during mix design or variations in materials and exposure conditions etc. and take necessary correction and modification measures to attain the desired strengths at 28 days. As per IS: 9013 methodology to predict the 28 days strength of concrete from accelerated cured strength are indicated only for normal/control concrete. In the past few year focus has shifted from Ordinary Portland Cement (OPC) to Portland Pozzolana Cement (PPC). Fly ash is also being used widely at sites as replacement of OPC. However, there is no such guideline available by which the assessment of 28 days strength of Indian fly ash concrete can be made from accelerated strength tests.  In the present study an attempt has been made to predict the expected 28 days compressive strength of concrete having PPC or OPC with fly ash using accelerated temperature regime methods. The experimental study includes the use of 2 brands of PPC, 5 brands of OPC and 2 sources of fly ash for replacement of OPC ranging from 20% to 45 %. Two temperature regimes 900C and 820C were used for accelerated curing. The samples were cured for 7.5 hours and 20hours respectively in each regime for expected 28 day compressive strength. The mathematical equations to estimate the 28 days compressive strength of concrete, cured at 900C for 7.5 hours for mixes having PPC, OPC mixed with fly ash 20% to 35% is fexp28 = 1.223 facs +2.024. The mathematical equations to estimate the 28 days compressive strength of concrete, cured at 900C for 7.5 hours for mixes having PPC, OPC mixed with fly ash more than 35% and up to 45% is fexp28 = 0.993 facs + 6.044.

References

ACI 214.1R (1987). Use of Accelerated Strength testing, ACI manual of Concrete practice.

Amritkar, S., & More, N. (2015). Statistical Modeling To Forecast The Strength Of Concrete Using Accelerated Curing, International Journal Of Research In Engineering And Technology, 4, 11.

ASTM C 684 (1999). Standard Test Method for Making, Accelerated Curing and Testing Concrete Compression Test Specimens

Bhanja, S., & Pan, S. (2013). Modified Water cement ratio law for fly ash concrete‖ The Indian Concrete Journal, 87, 21-28.

BS 1881(1983). Part 112 , Methods of Accelerated Curing of Test Cubes, British Standards.

CSA A23.1 (1970). Accelerating the curing of cylinders and determining their compressive strength Canadian Standards Agency.

IS- 456 (2000). Indian standard code of practice for plain and reinforced concrete, Fourth Revision, IS: 456-2000, Bureau of Indian standards, New Delhi.

IS- 9013 (1978). Method of making curing and determining compressive strength of accelerated cured concrete test specimens.

IS: 1489 (2015). Part 1, Specification for Portland Pozzolana Cement (fly ash based), Bureau of Indian Standards, New Delhi.

IS: 269 (2015). Ordinary Portland Cement - Specification, Bureau of Indian Standards, New Delhi.

IS: 3812 (2013). Part 1, Specification for pulverized fuel ash, Bureau of Indian Standards, New Delhi.

IS: 383 (2016). Specification for coarse and fine aggregates from natural sources for concrete, Bureau of Indian Standards, New Delhi.

IS: 9103 (1999). Specification for Concrete admixture, Bureau of Indian Standards, New Delhi.

Jayadevan, V., Valsalakumary, V. R., & Sufeera, O. B. (2014). Reliability of accelerated curing techniques for speedy design of concrete mixes—An appraisal of IS 9013: 1978 code. Indian Concrete Journal, 57-60.

Jayanta, N. C., & Jaydeep C. (2016). Development of Strength Prediction Models of 28 days Fly Ash Concrete Strength by Accelerated Curing Method, International Journal of Scientific & Engineering Research, 7(4), 83-86.

Khan, M. A., Chowdhry, M. A., Javed, A., Ahmed, M. L., & Kanwal, H. (2019). Strength prediction model for accelerated cured fly-ash based concrete. Mehran University Research Journal of Engineering & Technology, 38(4), 1057-1066.

Krishna, R., Kumar, R. P., & Khan, A. M. (2010). A study on the influence of curing on the strength of a standard grade concrete mix. Facta Universitatis-Series: Architecture and Civil Engineering, 8(1), 23-34.

Nikitha, P. & Kameswara R. B. (2019). Accelerated Method of Concrete Mix Proportioning by Incorporating Fly Ash and Silica Fume, International Journal of Recent Technology and Engineering, 7(6C2).

Shah, P., & BhavnaShah, S. (2011). Development of Mathematical Model to Predict Early Age Strength for Blended Cement through Accelerated Curing. In Published: National Conference on Recent Trends in Engineering & Technology on May.

Shelke, N. L., & Gadve, S., (2013). Prediction of compressive strength using Accelerated Curing”, International Journal of Pure & Applied Research in Engineering & Technology, 8(1), 90-99.

Tokyay, M. (1999). Strength prediction of fly ash concretes by accelerated testing. Cement and concrete research, 29(11), 1737-1741.

Udoeyo, F. F., Brooks, R., Udo-Inyang, P., & Nsan, R. O. (2010). Early prediction of laterized concrete strength by accelerated testing. IJRRAS, 5(1), 10. 1345-1353.

Published
2021-12-31
How to Cite
Ojha, P. N., Kumar, S., Mandre, M. K., Mittal, P., Singh, B., & V V, A. (2021). Empirical Equation for Concrete Made With PPC or OPC with Fly Ash by Accelerated Mix Design Method. Journal of Building Materials and Structures, 8(2), 103-114. https://doi.org/10.34118/jbms.v8i2.1487
Issue
Vol 8 No 2 (2021)
Section
Original Articles

Copyright (c) 2021 Journal of Building Materials and Structures

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.