Study on the influence of viscosity modified materials on the properties of C40 self-compacting concrete
HE Ping
YE Zhiyuan
Abstract：As a"double-hole limiting prefabricated track slab"structure born from CRTSⅢ type slab,it is commonly used in urban rail transit engineering,and the performance of its filling layer of self-compacting concrete is closely related to the load capacity of the track slab.The working properties and mechanical properties of C40 self-compacting concrete with different viscosity modified material content were studied experimentally.It is found that the incorporation of viscosity modified materials can effectively improve the working and mechanical properties of concrete.When the dosage of the viscosity modified material is 30 kg/m3,the initial expansion is 680 mm,the T500 is 3.89 s,the gas content is 7.8%,there is no loss in the 3 h state,the compressive strength is 52.5 MPa in 56 days,and the working and mechanical properties of C40 self-compacting concrete are the best.Finally,the unveiling experiment was completed and successfully applied to Nanjing Metro Line 6.
Keywords：viscosity-modified materialsC40 self-compacting concreteCRTSⅢ slab track systemdual-hole limited displace-ment precast track slab
Publication Date：2025-02-24
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 27-31 )