THE APPLICATION OF NAPHTHALENE SULPHONATED SUPERPLASTICIZER AND CEMENT REDUCER IN NORMAL-STRENGTH CONCRETE
DOI:
https://doi.org/10.26740/rekats.v14n01.p129-137Keywords:
Cement Reducer, Compressive strength, Normal-Strength Concrete, SuperplasAbstract
This paper discussed the effect of adding naphthalene sulphonated (NS) superplasticizer (SP) on compressive strength and water reduction in normal-strength concrete with the addition of cement reducer (CR). The mix design followed SNI 7656:2012, using cylindrical specimens sized 15 cm in diameter and 30 cm in height. The cement used was Ordinary Portland Cement from Dynamix, fine aggregate from Lumajang, coarse aggregate from Pasuruan, and water from the Batching Plant Laboratory of PT. Solusi Bangun Beton. The target strength was 30 MPa, with CR added at 0,8%. The variations in the dosage of naphthalene sulfonated superplasticizer were 0.3%, 0.5%, 0.8%, and 1%, with a test age of 28 days for each of the 9 test specimens. The result showed that a gradual water reducing reaching up to 54.26% at a 1% dosage. The average compressive strength of concrete with the addition of 0.8 CR at 28 days of age, with variations of 0%, 0.3%, 0.5%, 0.8%, and 1%, was obtained as 31.3 MPa, 38.7 MPa, 41.5 MPa, 44.00 MPa, and 40.7 MPa, respectively.
Keywords: Cement Reducer, Compressive Strength, Normal-Strength Concrete, Superplasticizer
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