This presentation investigates the properties of concrete with brick chips used as an internal curing medium. It includes an introduction to internal curing and its benefits. The objectives are to study the effect of internal curing on compressive strength at different ages and to assess its suitability. Materials were tested and sieved. Concrete mixtures with different curing conditions and brick/stone chip replacements were made and their compressive strengths at 28 days were compared. It was found that curing with polythene wrapping for 7 days produced the highest strengths. Without wrapping also gave effective results for some mixtures. 75% brick replacement was less effective than other replacements based on compressive strengths.

1. WELCOME TO OUR
PRESENTATION

2. Investigation of concrete properties with
brick chips as internal curing medium
NAME ID
MD. ZIAUL HAQUE ETHER M21535111006 (10TH)
MD. AL FAHAD 2161381002
MD. TARIQUL ISLAM 2161381010
RAHATUN NESA RAKA 2161381011
MD. ZAMINUL ISLAM 2161381012
Supervised
By
Md. Zakaria Habib
Assistant Professor
Dept. of civil engineering, Uttara University.

3. Overview
 Objective.
 Scope of the study.
 Benefits of internal curing.
 Curing Condition considered in the study.
 Experimental plan.
 Materials test result.
 Sieve analysis.
 Results.
 Conclusion.

4. Objectives
To study the effect of internal curing on
compressive strength of concrete at
different age of concrete.
To assess the suitability of internal
curing.

5. Scope of the study
 The experiment was conducted during fall. The relative humidity was
around 63% and temperature was high (around 30ºC) during the
experiment.
 Locally available lightweight aggregate Picked Jhama burnt clay
chips (Over Burnt Clay Bricks) was used which is cheap and easily
available to replace the crushed stone aggregates.
 In this experiment BC and Stone as coarse aggregate were used as
internal curing material.
 The effect of internal curing on compressive strength of concrete was
considered here.

6. Benefits
 Increase hydration and strength development capacity.
 Reduce shrinkage and cracking.
 Reduce permeability.
 Increase durability.
 Helps to achieve high strength concrete member.
 Mitigate the early-age cracking problem.

7. Curing Condition considered in the study
SL no. Acronym Curing condition
1 NC Normal curing under water
2 WP With polythene wrapping
3 WOP Without polythene wrapping
4 3-WP Three days normal curing under water then with polythene
wrapping
5 3-WOP Three days normal curing under water then without polythene
wrapping
6 7-WP Seven days normal curing under water then with polythene
wrapping
7 7-WOP Seven days normal curing under water then without polythene
wrapping

8. Experimental plan

9. Materials test result
Unit
weight
(Kg/m3)
Bulk
specific
gravity
(OD)
Bulk
specific
gravity
(SSD)
Absorption
capacity %
Fineness
modulus
BC 1545 2.05 2.18 6.4 7.2
SC 1210 1.90 2.00 15.8 6.9
Sand 1683 2.20 2.40 7.00 2.72

10. Cement test result
Test Title Results
Normal consistency (%) 29%
Initial setting time (minutes) 60
Final setting time (minutes) 210
28 days Compressive strength of mortar
(MPa)
31.61

11. Burnt brick chips sand Stone chips
Sample Material

12. Slump testmixing casting
Working Procedure

13. Curing
Submerged condition Wrapped with and without polythene

14. Compression test

15. Fig. 3.1 Sieve analysis for Brick chips
Sieve analysis of brick chips

16. Fig. 3.2 Sieve analysis for Stone chips
Sieve analysis of stone chips

17. Sieve analysis of sand
Fig. 3.3 Sieve analysis for Sand

18. Fig 4.1: Compressive strength of concrete for 100% brick chips at the age of 28 days [1:1.5:3]
Results

19. Results (Contd.)
Fig.4.2: Compressive strength of concrete for 100% stone chips at the age of 28 days [1:1.5:3]

20. Results (Contd.)
Fig. 4.3: Compressive strength of concrete for 75% brick chips and 25% stone chips at the age of 28 days
[1:1.5:3]

21. Results (Contd.)
Fig.4.4: Compressive strength of concrete for 50% brick chips and 50% stone chips at the age of 28 days
[1:1.5:3]

22. Results (Contd.)
Fig 4.5: Compressive strength of concrete for 25% brick chips and 75% stone chips at the age of 28
days [1:1.5:3]

23. Results (Contd.)
Fig.4.6: Compressive strength of concrete for 100% brick chips at the age of 28 days [1:2:4]

24. Results (Contd.)
Fig 4.7: Compressive strength of concrete for 100% stone chips at the age of 28 days [1:2:4]

25. Results (Contd.)
Fig. 4.8: Compressive strength of concrete for 75% brick chips and 25% stone chips at the age of
28 days [1:2:4]

26. Results (Contd.)
Fig 4.9: Compressive strength of concrete for 25% brick chips and 75% stone chips at the age of 28 days
[1:2:4]

27. Results (Contd.)
Fig 4.10: Compressive strength of concrete for 50% brick chips and 50% stone chips at the age of 28 days
[1:2:4]

28. Conclusions
 From compressive strength test, it has been found that internally
cured samples produced significantly higher strengths. It was
observed that 7-WP curing condition more effective than other
curing condition for internal curing.
 It is evident from the observed results that polythene sheet
covering ensures effective internal curing mechanism .
Polythene sheet covering prevent loss of water through
evaporation and eventually, more internal water remains
available for cement hydration. Utilization of polythene sheet
covering is a simple process since these sheets are less costly
and can be used repetitively.

29. Conclusions (contd.)
 Without polythene sheet cover also given a effective result
in 100%stone chips for 1:1.5:3 ratio and 75% stone chips
for 1:2:4 ratio.
 It has been found from the study that 75% replacement of
brick chips in 1:1.5:3 ratio and 25% replacement of brick
chips in 1:2:4 ratio are relatively less effective in
producing better concrete as compared to other
replacement according to their compressive strength.
 control concrete under normal curing (NC) showed the
maximum strength for both mix ratio with different
replacements.

30. Thank You

31. Questions ??