Abstract:
The purposes of this research are how to plan of paving block mixture optimum with the
addition silica fume and to study the effect addition silica fume against paving block
characteristics. That characteristics are compressive strength and water absorption. Mix design of
paving block used proctor methods. The percentage of silica fume used 0%, 5%, 10%, 15%, and
20% by weight of cement. Specimens cube of 8 × 8 × 8 cm for compressive strength testing and
specimens beam of 21 × 10,5 × 8 cm for water absorption testing with a total 75 samples. The
compressive strength and water absorption were tested at 28 days. The results showed that the
effect addition silica fume on paving block can increased the compressive strength and minimized
the water absorption compared paving block without this additive. Compressive strength obtained
with the addition 0%, 5%, 10%, 15%, and 20% silica fume were 36,5 MPa, 40 MPa; 39,5 MPa;
37,6 MPa, and 36,9 MPa. Water absorption obtained with the addition 0%, 5%, 10%, 15%, and
20% silica fume were 1,93%, 1,77%, 1,80%, 1,89%, and 1,91%. The highest compressive strength
and the smallest water absorption were paving block with the addition 5% silica fume at 40 MPa
and 1,77%.
