Research And Development The Emulsion Warm-mixed Agent And Study The Performances Of It’s Asphalt Mixture

Warm mix asphalt has the performance characteristics of low construction temperature,low energy consumption, extending the time of construction, environmental protection and soon. However, there are many kinds of warm-mixed agents on the market currently, and thequality is uneven, some good and some bad. And there are no system researches on theevaluation method of warm-mixed agent cooling effect, the road performance of mixtureasphalt and construction technology. It leads no rules to follow in warm mix asphaltapplications. So, based on the development of emulsification of warm-mixed agent, this thesisresearched the performance and construction technology of warm mix asphalt mixture.Paper started from the advantages and disadvantages of warm-mixed agents as well asdomestic warm-mixed agent product development, determined the product developingdirection is emulsification warm-mixed agent. Using surface chemistry theory, studied theemulsion and lubrication mechanism of warm-mixed agent, in order to balance theemulsifying performance of warm-mixed agent and water stability performance of asphaltmixture, developed a new emulsion warm-mixed agent product which improve the waterstability and workability of asphalt mixture--HH-X warm-mixed agent.Using dynamic torque sensor, researched the relationship between torque of the stirringgear suffered and friction and viscous of asphalt mixture, developed the workability of asphaltmixture tester, and proposed the indicator of asphalt mixture workability index. Usingworkability index curve, studied the temperature cooling effect of warm mixture asphalt, andcomparative analyzed with the porosity curve which determined by SGC method, and putforward that workability tester method is a way to evaluate cooling effect of warm-mixedagent, recommended a temperature formula under the condition of low air temperature in theconstruction process: Tlow=Tnorm+A×（10-t），and solved the problem of how to determine thebest temperature of asphalt mixture in every construction stages, andThrough the research warm-mixed agent dosage impact on the adhesion performance ofasphalt, asphalt mixture void ratio, water stability and workability, found that the bestblending ratio of HH-X warm-mixed agent and asphalt is10:90. Added HH-X warm-mixedagent into SBS modified asphalt,90#and70#matrix asphalt respectively, and studied theperformance changes, the results show that with no changing on other performance of asphalt,HH-X can significantly improve the adhesion performance between asphalt and aggregate andaging properties.According to the aging principle of asphalt and asphalt mixture, using rotary film oven,improved the test method of short-term aging, and the proposed aging test methods and test parameters of warm mixture asphalt. Using this method researched the aging properties ofwarm mix asphalt. Test results show that: the aging of warm mixture asphalt is much lowerthan that of hot mixture asphalt. And found that HH-X-type agent in the warm mix asphaltmixture has a little affect on high-temperature performance, but it can significantly improveits water stability and low temperature performance, and then come the conclusions thatIndoor fatigue test research shows: the addition of warm-mixed agent can significantlyimprove the k-value of, and the n-value decreased. Using ABAQUS and fe-safe softwarecalculating fatigue life of asphalt pavement, the results show that HH-X warm mix asphaltmixture fatigue life is1.12times of hot mix asphalt mixture. And contrast with the similartype of warm-mixed agent and organic additives Sasobit effect on asphalt and asphalt mixtureperformance, proved that HH-X warm-mixed agent is better than others.According to the real engineering research, proposed the construction quality controlmethods and technical requirements of emulsion type warm mix asphalt mixturesystematically; consider life cycle cost, HH-X warm-mixed agent can reduce engineering costabout340000yuan/Km, because it can significantly reduce the emissions of CO₂,savingenergy consumption, so it’s application has significant social and economic benefits.The research results of this paper play a guiding role on the performance evaluation ofwarm-mixed agents and warm mixture asphalt and construction technology, and providetechnical support for the application of warm mixture asphalt.