Experimental Study on Compressive Strength and Type Classification of Industrially Produced Mortar

Muhamad Yusya, Aghnia Darajatun, Nita Widia Khairinnisa Rustawa

Abstract


The bond between masonry and concrete units is provided by mortar, and its effectiveness is affected by the mix composition, water ratio, and curing process. This study aims to analyse the compressive strength of mortar produced by PT Beton Elemen Persada using two water ratios, namely 8.2 liters and 9 liters per 50 kg of cement, and to classify its quality according to SNI 03-6825-2002 and SNI 6882:2014/ASTM C270 standards. Cube specimens measuring 5 x 5 x 5 cm were used in laboratory experiments and tested at curing ages of 3, 7, 14, 21, and 28 days. The mortar's strength was determined by the compressive strength test as a standard procedure in construction, while flow table tests were used to evaluate its workability. The research showed that curing age has a significant impact on compressive strength, reaching an average of 13-14 MPa at 28 days.This value is acceptable for exterior walls and medium-load structures due to its compliance with the requirements for Type S Mortar (≥ 12.4 MPa). Furthermore, mortar properties were found to be influenced by the water ratio, with 8.2 liters producing denser mortar with higher strength, and 9 liters improving workability while reducing compressive strength. To sum up, the findings highlight the importance of regulating the water ratio to produce mortar that meets national and international construction standards with balanced compressive strength and workability.

Keywords


Compressive strength; Concrete materials; Mortar classification; Mortar types; Water ratio

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DOI: https://doi.org/10.17509/jptb.v6i1.96331

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