Experimental Investigation On Compounding Technology And Mechanical Properties Of Reactive Powder Concrete

In this paper, on the base of the comprehensive analysis of the most up-to-date development of Reactive Power Concrete(RPC) in domestics and abroad, in terms of the practical condition and the using of the common material in Fuzhou, RPC with excellent mechanics performance and durability is successfully prepared.According to the RPC200's basic principles, the raw material used in the RPC was selected by the investigation in Fuzhou. Different technological processes were compared, which would affect the RPC200's performance, and mixing sequence was defined. The hydration process of cement was analyzed and the basic standard ratio of RPC manufacture was put forward, and the best ratio was determined by the experiment on the total of 5 batches with 31 groups.The 5 batches with 31 groups of specimens were carried out four different curing systems including standard curing, hot water curing, dry heat curing and steam curing, and the regularity of RPC200's strength with different curing conditions was studied. A conclusion was acquired by the experiment that the RPC200's strength develops steadily in the steam curing which is mature and the economic benefits is more notable.Using the technology of environmental scanning electron microscope, the microstructure of RPC was preliminarily studied to analyze the reasons for the difference of mechanics performance in the different curing conditions.The 3 batches with 7 groups of prism concrete test specimens and the 3 batches with 22 groups of cube ones were used in mechanical properties test, and a series of parameters of RPC was acquired such as prismatic strength, the cubic strength, split and pull strength, deformation module, peak strain, Poisson's ratio. The formula of the deformation module and peak strain was established.