活性粉末混凝土的配合比试验研究

Proportional experimental of reactive power concrete

考察了各组分掺量、纤维的种类和掺量、作为第六组分的超细粉煤灰的掺量以及原状粉煤灰取代石英粉在不同水胶比条件下对RPC强度和流动度的影响,同时考察了高温养护对强度的影响。结果表明:当石英砂:水泥:原状粉煤灰:超细粉煤灰:硅灰:减水剂=0.9:1:0.35:0.3:0.35:0.016,水胶比为0.16,RPC具有较好的力学性能和工作性能。在高温养护条件下,不掺纤维时抗压强度达到199.8MPa,加入钢纤维和聚丙烯纤维时,抗折强度为51.1MPa,而抗压强度分别高达210.2MPa和242.6MPa。

The influence of contents of every component, fiber categories and contents, contents of ultra-pulverized fly ash which was found as the sixth component and quartz power which was replaced by raw fly ash in the condition of different water/binder on the strength and fluidity was reviewed;also, the influence of high temperature curing on the strength was reviewed too.The result showed that RPC had better mechanics performance and workability when Silica Sand：Cement：FA：UPFA：Silica Fume： superplastic amounted to 0.9：1：0.35：0.3：0.35：0.016, and water/binder was 0.16.In the condition of high temperature curing, the compressive strength reached 199.8 MPa without steel fiber, flexural strength was 51.1 MPa and compressive strength was 210.2 MPa and 242.6 MPa with steel fiber and polypropylene fiber respectively.