洛阳地区铁勺渡槽系大跨度空腹桁架结构,跨长均为34.8m。为了减轻渡槽构件的吊装重量,构件的混凝土选用了R500预应力高强混凝土,由于拌制混凝土的水泥为525号普通硅酸盐水泥,混凝土的水灰比一般为0.35左 The long-span fast-moving truss structure of the iron scoop aqueduct in Luoyang is 34.8m in length. In order to reduce the lifting weight of the aqueduct components, R500 prestressed high-strength concrete is used as the concrete member. Since the cement used for mixing concrete is ordinary portland cement No. 525, the water-cement ratio of the concrete is generally 0.35