Abstract:
A development of Reactive Powder Concrete (RPC) currently is
the use of quartz powder as a stabilizing agent with the content to cement
ratio of 30% and steam curing method in an autoclave temperature of 250ºC
which produced a high compressive strength of 180 MPa. That RPC can be
generated due to one reason for using the technique of steam curing in an
autoclave in the laboratory. This study proposes in-situ curing method in
order the curing can be applied in the field and with a reasonable
compressive strength results of RPC. As the benchmarks in this study are the
curing methods in laboratory that are steam curing of 90°C for 8 hours (C1),
and water curing for 28 days (C2). For the in-situ curing methods that are
covering with tarpaulins and flowed steam of 3 hours per day for 7 days (C3),
covering with wet sacks for 28 days (C4), and covering with wet sacks for
28 days for specimen with unwashed sand as fine aggregate (C5). The
comparison of compressive strength of the specimens in this study showed
compressive strength of RPC with in-situ steam curing (101.64 MPa) close
to the compressive strength of RPC with steam curing in the laboratory with
8.2% of different. While in-situ wet curing compared with the water curing
in laboratory has the different of 3.4%. These results indicated that the
proposed in-situ curing methods are reasonable good in term of the
compressive strength that can be achieved.
