Experimental Studies On The Abrasion Resistance Of Fiber Concrete

With the large-scale infrastructure construction of our country, the demand of concrete is more and more big, the fly ash as the major concrete admixtures, has gradually can not meet the needs of society, at the same time of high pollution and high energy consumption in the cement industry, forcing us to search for a better method for treatment of industrial waste residue. Phosphorus slag is the waste residue of yellow phosphorus production of industry, ash emissions greatly, therefore, experimental study on effect of phosphorus slag to be launched on the performance of concrete, of phosphorus slag to replace the feasibility and superiority of fly ash.This paper aims to study on the effects of phosphorus slag on concrete mechanical performance and durability. By orthogonal test, the significant influence of water-binder ratio, fly ash, phosphorus slag, silica fume, sand ratio of five factors on the mechanical properties of concrete; Select the water-binder ratio, phosphorus slag five factors in their optimal level, and then determine the optimal ratio of phosphorus slag concrete. Finally, in order to not mixed with any of a group of mixture as the reference group, a single phosphor slag and preferably group influence rule on performance, the shrinkage of concrete impact abrasion resistance and resistance to chloride ion penetration, contrast.Test results:(1) phosphorus slag concrete optimal ratio of A3B1C1D3E1:water-binder ratio0.35,15%of phosphorus slag, silica fume quantity4%, sand ratio36%. The optimal ratio of concrete workability, mechanical properties and excellent durability.(2)the order of significance in this thesis, the selected five factors effect on the compressive strength of concrete28d from large to small is as follows:A (water to cement ratio)> D (silicon fume)>E (sand ratio)> B (the content of phosphorous slag)> C (fly ash); to significant sequence28d splitting tensile strength of:B> C>D> E> A; on28d tension and compression ratio significantly affects the order was:B> A>C> E> D.(3) phosphorus slag concrete6h flux than the reference concrete was reduced by57.6%(1217q), chloride ion permeability of concrete is very low, the compound effect of phosphorus slag and silica fume significantly reduce the chloride ion erosion, effectively reduce the chloride ion erosion hazards for concrete structure.(4) phosphorus incorporation of slag can significantly reduce the shrinkage of concrete at early age. Compared with, the reference concrete, phosphorus slag and silica fume mixed with the shrinkage of concrete60d value reduced by52.2%; even with phosphorus slag concrete, the60d shrinkage is reduced27.3%, phosphorus slag and silica fume admixture compound to reduce the shrinkage of concrete.(5) the incorporation of silica fume in concrete, resistance to abrasion phosphorus slag and silica fume larger contribution and compound admixture, concrete wear rate than the reference group decreased51.5%, single phosphorous slag, wear rate decreased14.1%.