Property Study Of The Concrete Used In Guardrail With Slipform Construction

Highway concrete crash barrier to prevent more a way out of the vehicle andwith less maintenance costs, and so on. The sliding mode technology road concretecrash barrier construction, a construction method is widely used abroad, and there arevery few applications. The paper relies Engineering Co., Ltd. of Guangdong longhighway cement concrete New Jersey guardrail slipform "research projects, initiated acomprehensive study of the fence sliding mode concrete.This paper from sliding fence of concrete paving work factors departure, bysimulating concrete transportation environment for the conduct guardrail slidingconcrete slump loss test, get the fence sliding workability of concrete pavingreference curve.In this paper, test, sliding concrete fence made of cement, aggregates, admixturesselection basis and technical indicators. Using P.O42.5R â…¡ grade fly ash as cementand cementitious materials,5mm~10mm10mm~25mm gravel and crushed stone ascoarse aggregate, mixed with air entraining retarding superplasticizer for mix design.With sand fineness modulus, sand ratio, water-cement ratio, fly ash as factorsorthogonal design method primaries mix. Combined fineness modulus, fly ash parallelexperiments, and outdoor paving verification, have four kinds of mix. Sliding fenceconcrete mixture on the work performance of the mechanical properties of hardenedconcrete, volume stability and durability properties of composite indicators werestudied, the results showed that: Concrete work and mechanical properties of stable,concrete shrinkage values than small, resistance to water penetration resistance tochloride ion penetration capability and performance in general.In this paper, outdoor paving operation and the past successful experience, theproposed fence Sliding concrete construction technology, construction quality controlof content, technical and economic benefits of the fence sliding form construction.