Research On Ice Breaking Test Of Diatomite And Rubber Particles Composite Modified Asphalt Mixture

Jilin province is located in the seasonal frozen region, and the snow is frequent in winter,leading to the icing phenomenon often appears on the city bridge deck pavement. Now the mainice and snow removing mean is to spread snow-melt agent in time. It can play a certain effect,but in the long-term it may have a negative effect on the bridge service level. Therefore, it hasimportant practical significance to put forward a new material used on city bridge deckpavement in the seasonal frozen region.Burying and stacking waste rubber tires will seriously pollute our environment. A kind ofimportant ways is to make waste rubber tires into rubber particles through a certain process, andthen use the rubber particles to make a special asphalt mixture pavement. As an industrialmineral aggregate, diatomite, widely distributing in Jilin Province, is used as a good inorganicasphalt modifier, which has been verified by many scholars. It is of good environmental andeconomic value to make comprehensive development and utilization of these materials. Use acertain process to blend rubber particles and diatomite into asphalt mixture, and produce a newtype of asphalt mixture called Diatomite and Rubber Particles Composite Modified AsphaltMixture, which is for bridge deck pavement in seasonal frozen region. This new type asphaltmixture can effectively improve the ice-breaking ability, conducive save resources, protectenvironment, and promote construction of green ecological city bridge.This paper is based on the Jilin province science and technology key project "Research andProduct Development on Green Ecological Bridge Deck Pavement Material in Seasonal FrozenRegion", and several aspects were studied as follows:(1) According to the design goals,determined a reasonable gradation and amount of rubber particles and diatomite modifier, andoptimized the production process of mixture.(2) Did Marshall test on modified asphalt mixture,made analysis on the effects of rubber particles, diatomite, and different gradation on themixture volumetric parameters and mechanical indexes.(3) Studied the elastic modulus of the modified asphalt mixture in different rubber particles and under different temperatureconditions.(4) Did ice breaking test on Diatomite and Rubber Particles Composite ModifiedAsphalt Mixture by using Ice-breaking Simulation Testing Machine. The test were carried outunder different conditions: different rolling times, different rubber particle sizes, different icethicknesses, different temperatures, different load frequencies. Used ice-breaking rate as theevaluation index of ice-breaking performance. Extracted the ice-breaking rate through the edgedetection image processing technology.(5) Did snow removal test on Diatomite and RubberParticles Composite Modified Asphalt Mixture by using Ice-breaking Simulation TestingMachine;(6) Used SPSS data analysis software to study the correlation between ice-breakingconditions and ice-breaking rates of Diatomite and Rubber Particles Composite ModifiedAsphalt Mixture ice-breaking specimens.