Modified polyurethane and its composition design for colored anti-slip surface layer
Aiming at the cracking,peeling and other diseases that often occur in the colored anti-skid surface layer,the composite ad-hesive was studied with polyurethane as base material and epoxy resin as modifier and based on this,the composition design of the anti-sliding surface layer was carried out.Firstly,it was determined through tensile testing that when the mass fraction of epoxy added was 15％,the modified polyurethane had both good strength and toughness.Then,the low temperature performance of the modified polyure-thane was tested by bending rheological test,which showed that the low temperature performance of the modified adhesive was signifi-cantly improved.Finally,using AC-13C asphalt concrete as the base surface,the indoor accelerated loading test was used to test the decay law of the anti-skid and wear-resistance of the anti-skid surface layer,including three indicators of friction pendulum value,structural depth,and spalling rate.Based on this,the composition design ofthe color anti-skid surface layer was carried out.The recom-mended optimal dosage for anti-skid surface layer adhesive on AC-13C pavement was 1.0 kg/m2,and the optimal dosage for colored ce-ramic particles was 2.5 kg/m2.
NETL
NSTL
万方数据
