PREPARATION OF REACTIVE POWDER CONCRETE MANHOLE COVER USING SCRAP TIRE STEEL FIBER
Reactive Powder Concrete (RPC) is a new type of building material with ultra-high strength, high toughness, high durability, and good volume stability.It usually is widely used in roads, bridges, and tunnels, et al.However, the expensive cost of RPC is the most important reason for restricting that as a widely used engineering material.Especially, the expenditure of steel fiber accounts for about 50% of the total cost.This paper aims to use the scrap tire steel fiber to replace all the traditional copper-plated steel fiber to produce a cost-effective RPC.At the same fiber dosage, the fluidity of RPC containing scrap tire steel fiber is worse than that containing copper-plated steel fiber.Modified polycarboxylate based superplasticizer effectively improves the fluidity of RPC containing scrap tire steel fiber and guarantee mechanical properties.The prepared RPC sample has a fluidity of 183 mm, the 28 day flexural strength of 28.3 MPa, and the 28 day compressive strength of 196.3 MPa.Then, we successfully used scrap tire steel fiber to prepare D400 RPC manhole cover according with the demand of GBT 23858-2009 of China.
Reactive powder concrete Scrap tire steel fiber Copper-plated steel fiber Manhole cover
X.Xu Z.Y.Hu R.H.Zhang Y.H.Liu X.G.Yang
State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest Un Fujian Chengxing New Material Technology Co., Ltd., P.R.China
国际会议
福州
英文
684-692
2018-11-07（万方平台首次上网日期，不代表论文的发表时间）