Karakteristik Susut Beton Dengan Alwa Murni
Keywords:Pure alwa, compressive strength, porosity, shrinkage, mortar.
Shringkage is one of the important concrete properties which, decreasing
durability of concrete and causeing concrete cracking. The shrinkage will
depend on aggregate selected. In this researd used a pute alwa aggregate which
made from expanded clay burned in rotary kiln at high temperature (>6000C).
Alwa has a rough surface shape, high absorption that allows aggregate to store
water needed for concrete hydration which can be removed from the shrinkage.
This analysis uses experimental methods, and uses mortar specimens with 5x5x5
cm cubes. Mixed mortar design using the DoE method and for testing in test are
compressive strength, porosity, and shrinkage of concrete. The results show that concrete mortar using alwa enough effective to reduce
shrinkage with optimum addition of 18% for 20 - 30% percent did not meet the
compressive strength of the planned.
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