Designing and evaluating method for modulus-based bituminous mixture
A technology of asphalt mixture and mixture, which is applied in the field of design and evaluation of asphalt mixture, asphalt pavement, and asphalt mixture, and can solve the problems of design time and cost
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[0027] A modulus-based design and evaluation method of asphalt mixture, which is characterized by the following steps:
[0028] 1) Investigate or test the performance of local aggregates and asphalt, including aggregate gradation, density, elastic modulus, and dynamic shear modulus of asphalt;
[0029] 2) Grading design, based on local aggregate grading and specifications, suggest grading preliminary selection;
[0030] 3) Predict the VMA value of the mixture by using the VMA prediction formula of the asphalt mixture mineral clearance ratio, and adjust the gradation to make the VMA value meet the specification requirements;
[0031] VMA prediction uses the following formula:
[0032]
[0033] Where: VMA is the predicted value of mineral clearance ratio; f vi Is the influencing factor of mineral clearance rate; V ai Is the sieve volume of the i-th aggregate;
[0034] f vi =[V vi -V v(i-1) ] / V ai
[0035] Where: V vi Is the volume of the pores in the i-th grade aggregate after mixing; V ...
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