Effect Of Hydrophpbic SAP On Frost Resistance And Impermeability Of Concrete

Nowadays, the issue of concret durability gets more and more attention. It's known to us, internal air-entraining can improve the frost resistance of concrete. however, too much air entraining bring impermeability problems,which can be solved by improving the density of concrete. Appropriate curing conditions can make a more complete hydration of cementitious materials, thereby increasing the density. Unfortunately, the traditional maintenance is time-consuming, uneconomical, and poor conservation effect. The introduction of the conservation of superabsorbent material (SAP) can be a good solution to this problem. In addition, the impermeability of concrete can be greatly improved by mix with permeability silicone hydrophobic.This reseach selected two kinds of silicon hydrophobic in the market which are very normal used and pretend to combine frost protection and hydrophobic impermeability. Firstly, experiments proved pre-absorbent can handle better than direct on SAP hydrophobic, and gived the exactly value. The different concentration abhorred agent is studied within the SAP treated curing and hydrophobic effect., followed by the studies of different concentrations of water repellent treatment for SAP on the conservation and hydrophobic effect, the election of the best concentrations of hydrophobic agent A former SAP solution is0.1, the optimal concentration of hydrophobic agent B solution is0.166.Again through different combinations of factors on the compressive strength of concrete, influence of water absorption, the electric flux by the concrete compressive strength test results most reasonable SAP content is0.15%, and the water absorption test concrete electric flux comprehensive description of the size range of80~150?m more reasonable.Finally, the research also find that concrete group by entraining SAP, which was teated by hydrophobic agent, perform the best in a freeze-thaw cycle test A.