Universal Journal of Engineering Science(CEASE PUBLICATION) Vol. 7(2), pp. 39 - 45
DOI: 10.13189/ujes.2019.070203
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Effects of Superplasticizing Admixtures on the Compressive Strength of Concrete

Musbah Guma Musbah , Allam Musbah Al Allam ^*, Hosni Abdulruhman Saleh , Ibrahim Mousbah Ateeg
College of Technical Sciences, Bani Walid, 00218, Libya

ABSTRACT

Nowadays, the most widely used construction materials in the market for both structural and non-structural applications are concrete-based. Concrete in general is made up of a combination of cement, aggregate, water and an additional material known as an admixture. The admixture is sometimes added to modify certain properties of concrete. Superplasticizer (SP) is one type of the admixtures, which was used for this study to modify the properties of concrete. Correct composition of admixture is important as usage of incorrect admixture, mix proportion and improper dosage of SP might cause high-slump concrete, bleeding, segregation and cracking due to shrinkage. Therefore, this project aimed to determine the optimum dosage of SP for normal strength concrete by studying the effects of three different dosages of SP, (500, 750 and 1000 ml/100kg) on properties of concrete in fresh and hardened state. Two series of concrete mix consisting of eight samples for both grades C25 and C30 were prepared for the experimental work. The control mix (without SP) was designed based on the DOE method. One type of specimen was used in different quantity. As a result, the optimum dosage of SP for the studied concrete properties was 750 ml/100kg of cement for both grades C25 and C30. Some comparative analyses were done to determine the relationships between the various parameters. It was found that the mechanical properties of the concrete mix with optimum SP, namely the compressive strength is higher than the control specimens. It was also found that the physical properties of the concrete mix with the optimum SP dosage improve workability.

KEYWORDS
Normal Concrete, Admixtures, Superplasticizer (SP), Optimum Dosage of (SP), DOE Method, Compressive Strength

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Musbah Guma Musbah , Allam Musbah Al Allam , Hosni Abdulruhman Saleh , Ibrahim Mousbah Ateeg , "Effects of Superplasticizing Admixtures on the Compressive Strength of Concrete," Universal Journal of Engineering Science(CEASE PUBLICATION), Vol. 7, No. 2, pp. 39 - 45, 2019. DOI: 10.13189/ujes.2019.070203.

(b). APA Format:
Musbah Guma Musbah , Allam Musbah Al Allam , Hosni Abdulruhman Saleh , Ibrahim Mousbah Ateeg (2019). Effects of Superplasticizing Admixtures on the Compressive Strength of Concrete. Universal Journal of Engineering Science(CEASE PUBLICATION), 7(2), 39 - 45. DOI: 10.13189/ujes.2019.070203.