ABSTRACT
In this project,
the Effects of Salt Water on the Mechanical Properties of Concrete was
determined. For Compressive strength test, total number of concrete cubes cast
was seventy two, that is, thirty six cubes using salt water and thirty six
cubes using fresh water. Similarly, total number of beams cast for flexural
strength test was the same as compressive strength test. Also, total numbers of
concrete cylindrical cubes cast for Split tensile strength were the same too.
Three mix ratios used were (1:1.51:3.2), water
cement ratio (0.47), (1:2.06:4), water cement ratio (0.58), and (1:3.3:5.3),
water cement ratio (0.78) respectively. The concrete cubes, beams and
cylinders were cured at 7, 14, 21 and 28 days hydration period respectively
before crushing. The results of the
average compressive strength of concrete obtained using fresh water of mix ratio (1:1.51:3.2), ranges from
(43.26-47.90)N/mm2 while that of its salt
water ranges from (42.07-47.26)N/mm2.
The flexural strength of concrete obtained using fresh water of the same mix
ratio ranges from (6.60-9.09)N/mm2
while that of its salt water
ranges from (5.98-8.08)N/mm2.
The split tensile strength of concrete obtained using fresh water
of the same mix ratio ranges from (3.30–3.69)N/mm2 while
that of its salt water ranges from (3.24-3.64)N/mm2.
Similarly, result of the average compressive strength of concrete obtained using
fresh water of mix ratio (1:2.06:4)
ranges from (26.07-41.62)N/mm2 while that of
its salt water ranges from
(25.92-38.96)N/mm2. The flexural strength of concrete
obtained using fresh water of the same mix ratio ranges from
(6.55–8.24)N/mm2 while that of its salt water ranges from (6.26-8.18)N/mm2. The split tensile strength of concrete
obtained using fresh water of the same mix ratio ranges from (2.00–3.20)N/mm2 while
that of its salt water ranges from (2.00-3.00)N/mm2.
Again, result of the average compressive strength of concrete obtained using
fresh water of mix ratio
(1:3.3:5.3), ranges from (16.29-29.63)N/mm2 while that of its salt water ranges from
(16.15-27.71)N/mm2. The flexural strength of concrete
obtained using fresh water of the same mix ratio ranges from
(6.18–9.07)N/mm2 while that of its salt water ranges from (6.15-8.39)N/mm2. The split tensile strength of concrete
obtained using fresh water of the same mix ratio ranges from
(1.25–2.28)N/mm2 while that of its salt water ranges from (1.24-2.13)N/mm2. The initial
and final setting time of cement using fresh water was 50 minutes and 586
minutes while that of salt water was 57 minutes and 607 minutes respectively.
The water analysis result shows a high percentage content of salinity of
930mg/l as chlorine in salt water and 0.00mg/l in fresh water. The difference
in the slump, compressive, flexural and split tensile strength of concrete for
fresh and salt water was as a result of the salinity content of the salt water
sample used. I conclude that salt water has slight effect on the concrete and
will corrode reinforcement if used in the construction; hence, I recommend
the use of super sulphate cement which is resistance to sulphate attack.
OKORONKWO, D (2024). Effects of salt water on the mechanical properties of concrete (Case Study: Nembe Salt Water):- Ukpabi, Okoronkwo D. Mouau.afribary.org: Retrieved Dec 25, 2024, from https://repository.mouau.edu.ng/work/view/effects-of-salt-water-on-the-mechanical-properties-of-concrete-case-study-nembe-salt-water-ukpabi-okoronkwo-d-7-2
DANIEL, OKORONKWO. "Effects of salt water on the mechanical properties of concrete (Case Study: Nembe Salt Water):- Ukpabi, Okoronkwo D" Mouau.afribary.org. Mouau.afribary.org, 25 Apr. 2024, https://repository.mouau.edu.ng/work/view/effects-of-salt-water-on-the-mechanical-properties-of-concrete-case-study-nembe-salt-water-ukpabi-okoronkwo-d-7-2. Accessed 25 Dec. 2024.
DANIEL, OKORONKWO. "Effects of salt water on the mechanical properties of concrete (Case Study: Nembe Salt Water):- Ukpabi, Okoronkwo D". Mouau.afribary.org, Mouau.afribary.org, 25 Apr. 2024. Web. 25 Dec. 2024. < https://repository.mouau.edu.ng/work/view/effects-of-salt-water-on-the-mechanical-properties-of-concrete-case-study-nembe-salt-water-ukpabi-okoronkwo-d-7-2 >.
DANIEL, OKORONKWO. "Effects of salt water on the mechanical properties of concrete (Case Study: Nembe Salt Water):- Ukpabi, Okoronkwo D" Mouau.afribary.org (2024). Accessed 25 Dec. 2024. https://repository.mouau.edu.ng/work/view/effects-of-salt-water-on-the-mechanical-properties-of-concrete-case-study-nembe-salt-water-ukpabi-okoronkwo-d-7-2