Studyfrom the choice of materials, construction techniques and pouring conservationand other aspects of the special requirements of the silicon powder concreteconstruction. Engineering examples prove that the silicon powder concretehydraulic structures with superior performance than ordinary concrete.
Silicon powder is ferroalloy smelting generatedby high purity quartz and coke chemical reaction in electric arc furnace, andobtained by collecting emissions of gas powder in the electric arc furnace.1982 metalpowder supplier first time added silicon powder into concrete andcomprehensive study of its performance, silicon powder concrete cause peoples concerns.Due to the complementary properties of silicon powder concrete and Portlandcement, coupled with the benefit of environmental protection (silicon powderwith the electric arc furnace gas into the air, causing severe dust pollution),silicon powder has been identified as a new auxiliary cementing material beingwidely studied and applied.
Adding silicon powder can effectivelyreduce the accumulation of moisture in concrete and steel interface, to improvethe adhesion of reinforced concrete. Under the same conditions of the water-cementratio and concrete mix proportion, the compressive strength of mix siliconpowder concrete was significantly higher than ordinary concrete. Experimentalstudies have shown that more than 20% silicon powder dosage in concrete, the compressivestrength of silicon powder concrete no longer increase with increasing siliconpowder dosage; silicon powder dosage does not exceed 20%, the elastic modulusof the silicon powder concrete is increased with the silicon powder contentincreased.
Silicon powder average particle size is 100 mm, belong to the case of nano-particles, with superiorperformance of the concrete mixer truck cleaning volcanic ash. Added to cement concrete, not only can fillthe voids of the cement, more important is the nanometer silicon powder reactwith Ca (OH) 2 in thecement paste, generated colloidal hydrated calcium silicate, improve theinterface of cement paste and aggregates structure and performance. Reduceporosity, enhanced the concrete impermeability and durability. The study showedthat the silicon powder concrete can effectively resist the CL-penetration, andgreatly reduce the corrosion of reinforced concrete CL-invasive Shun tendonscracks, in order to effectively improve the performance of concrete cracking.This superiority is especially suitable for a harbor concrete engineering.
Due to the silicon powder special physicaland chemical properties, can be used in manufacturing high-strength, lowpermeability and chemical resistance of concrete, in hydraulic structures,transportation, building construction all have a huge market. But siliconpowder concrete construction technology and ordinary concrete is not the same,only to strictly observe and correct use of silicon powder concrete productswill get qualified.
Silicon powder in the transport and storagemust be kept dry and not damp. For ease of use, silicon powder can mechanicalagitation into a uniform slurry concentration of 30% to reserve seven daysbefore use. The stored slurry pond must be clean and watertight, covered toavoid evaporation and to prevent the inflow of rain and sewage. Beforeconstruction, to prevent sediment stratification must be stirring frequently toensure uniformity. Silicon powder concrete slump is sensitive to the amount ofwater added. The moisture content should be measured before construction,aggregate construction site and calculate concrete design water, additives toprevent agglomeration, best made solution Stirbefore using. Silicon powder concrete as a surface layer with ordinary concretepouring, before the initial setting ordinary concrete vibrators laid siliconpowder concrete, and used pokers inserted ordinary concrete layer 2 cm vibration compacting, guaranteebetter concrete bonding between layers.
