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The Qinghai-Tibet railway lies in the west area of China at an altitude of more than 4,000 meters. The 576-km railway is being built on frozen earth. The bad climate and sandstorms of the tundra require the concrete of the bridge to have superior mechanical properties and high durability. By adding portland cement, silica fume, superfine fly ash, and(More)
Steel string strain gauges are pre-embedded in ten pieces of 20m-span low-height reactive powder concrete(RPC) T-beam to test the changing law of early shrinkage along the height of T-beam's section. According to this law, self-restraint stress which comes out of uneven shrinkage of RPC, and easy cracking dangerous areas which are caused by self-restraint(More)
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