THE USE OF NATURAL TRASS FROM SAYUTAN MAGETAN AND LIME FROM NGAMPEL BLORA AS THE MATERIAL OF CEMENT SUBSTITUTION FOR MORTAR MIXTURE
Abstract: Construction works
in the Regency of Magetan, as well as in the mountain area far from capital
cities and remote from transportation facilities, require large amount of
material. In order to cope with the need of sand, people uses natural trass
which are plenty to be found in the area. Test and research on its
characteristic and strength with its potentials to be used as cement
substitution have never been carried out. Lime was taken from Ngampel village,
Blora as it is commonly sold in the area. The planned mixture of lime-trass
paste was in the effort to obtain the best composition. The weight ratios used
were 100%:0%, 80%:20%, 60%:40%, 40%:60%, 20%:80 and 0%:100%. The mortar mixture
with cement substitution was 100%, 80%, 60%, 40%, 20% and 0%.The compressive
strength of the lime-trash mixture was between 0.000 MPa and 2.545 MPa. The
mortar compressive strength achieved was 0.373 MPa - 26.585 MPa. The test
results of mortar compressive strength showed that the more cement substitution
amount used, the less the compressive strength would be. The mortar compressive
strength increased in line to the age of the mortar. The mortar tensile
strength obtained was 0.000 MPa - 2.169 MPa. The block compressive strength
obtained was 3.336 MPa - 3.403 MPa. Water absorbency of the block was 15.831%
-16.056%.
Author: Muhammad Nurzain, Iman
Satyarno, Muslikh
Journal Code: jptsipilgg130034
