UJI EKSPERIMENTAL PERBANDINGAN KUAT TEKAN MORTAR NORMAL DENGAN MORTAR MENGGUNAKAN BAHAN SUBSTITUSI KACA

Abstract

In construction, concrete and mortar are one of the most widely used components in the
construction world. If more and more concrete and mortar are used, the need for materials
such as cement, sand and gravel will increase. So in time these materials will become
scarce. From this reason, an idea came up to utilize glass waste which was wasted from
broken drinking glasses and beverage bottles in the surrounding environment to be mixed
into mortar as a substitute for fine aggregate. This study uses a cube test object measuring
303
5 x 5 x 5 cm, the manufacture of the test object uses several variations of a mixture of
1pc: 2ps, 1pc: 5ps, 1pc: 8ps, and uses glass substitution materials of 15% and 30%. The
method used in this test is SNI 03-6882-2002 concerning mortar specifications for
masonry work. This test object will be tested at the age of 28 days. In the mortar
compressive strength research, there was a change in the compressive strength of the 15%
and 30% substitution mortar, namely for variations 1 15% 25.76 Mpa and 30% 30.18
Mpa, for variations 2 15% 5.82 Mpa and 30% 8, 22 Mpa, for variation 3 15% 2.20 Mpa
and 30% 2.31 Mpa from normal compressive strength variation 1 normal 28.09 Mpa,
variation 2 normal 8.21 Mpa and variation 3 normal 2.33 Mpa. Based on the results
obtained, the addition of glass powder as a partial substitute for sand can affect the
compressive strength of the mortar, where by replacing the partial sand with a certain
amount can increase or decrease the compressive strength of the mortar.