Method for matching asphalt suitable for different asphalt pavement

Abstract

A method for matching asphalt mixture suitable for different asphalt road is provided which comprises of steps of: (1) aggregate test; (2) choosing of design aggregate; (3) choosing of dosage of asphalt; (4) Marshall test; (5) high temperature stability test of asphalt mixture at best oil amount; (6) water stability test of asphalt mixture at best oil amount; (7) low temperature bending test of small beam of asphalt mixture at best oil amount. The advantages of the present invention lies in: (1) can obtain high resistance friction to resist track and limit slightness granules to make the aggregate not easy to crash in the build process and traffic, and limit clay content and enhance bond force of aggregate and asphalt; (2) the structure of mixture is reasonable; (3) analysis process of asphalt volume is nicer; (4) asphalt road surface has high anti-track capability, at the same time has higher consistency of vibratory compaction; (5) the mixture prepared by the present invention has merits of less largest dimension granule diameter coarse aggregate and fine aggregate, and more medium aggregate, so the uniformity is good, and easy to press, and the mixture is tends to interlocked-denseness and the framework is good.

Description

(1) Technical field:

[0001] The invention relates to a method for preparing a highway pavement mixture, in particular to a method for selecting asphalt mixtures suitable for different asphalt pavements. (2) Background technology:

[0002] Although the conventional asphalt mixture ratio design method used at present has been modified many times, it is still difficult to solve the pavement diseases caused by current traffic. Marshall applies stability, flow value, density, and void ratio analysis to asphalt mixture design. These data are not directly related to the damage pattern of asphalt pavement. At the same time, Marshall's method of compacting test pieces with an infusion agent is far from the actual road surface formed by rolling. Its stability cannot properly evaluate the shear strength of the hot-mix mixture, and its stability has nothing to do with road rutting. In addition, the Marshall design method mostly uses the median value of the specified gradation to design the m...

Examples

Embodiment

[0023] Example: A method for selecting asphalt mixtures suitable for different asphalt pavements, characterized in that it includes the following steps:

[0024] (1) Aggregate test: Carry out generality test and aggregate density test on aggregate to evaluate the road performance of aggregate;

[0025] (2) Select and design aggregate structure, including:

[0026] ①Determine the test gradation: debug and select three gradations of coarse, medium and fine;

[0027] ②Evaluate the performance of the aggregate mixture, and calculate the initial dosage of the three grades according to the density and water absorption of the aggregate;

[0028] ③Forming test gradation test piece, evaluation test gradation, select design gradation: use initial oil volume to form test piece;

[0029] (3) Design asphalt dosage selection, the asphalt dosage of hot mix asphalt mixture is between 3% and 6%, including:

[0030] ① Calculate the amount of asphalt required for the three graded asphalt mixtures wh...

(1) Technical field:

[0001] The invention relates to a method for preparing a highway pavement mixture, in particular to a method for selecting asphalt mixtures suitable for different asphalt pavements. (2) Background technology:

[0002] Although the conventional asphalt mixture ratio design method used at present has been modified many times, it is still difficult to solve the pavement diseases caused by current traffic. Marshall applies stability, flow value, density, and void ratio analysis to asphalt mixture design. These data are not directly related to the damage pattern of asphalt pavement. At the same time, Marshall's method of compacting test pieces with an infusion agent is far from the actual road surface formed by rolling. Its stability cannot properly evaluate the shear strength of the hot-mix mixture, and its stability has nothing to do with road rutting. In addition, the Marshall design method mostly uses the median value of the specified gradation to design the m...

Examples

Embodiment

[0023] Example: A method for selecting asphalt mixtures suitable for different asphalt pavements, characterized in that it includes the following steps:

[0024] (1) Aggregate test: Carry out generality test and aggregate density test on aggregate to evaluate the road performance of aggregate;

[0025] (2) Select and design aggregate structure, including:

[0026] ①Determine the test gradation: debug and select three gradations of coarse, medium and fine;

[0027] ②Evaluate the performance of the aggregate mixture, and calculate the initial dosage of the three grades according to the density and water absorption of the aggregate;

[0028] ③Forming test gradation test piece, evaluation test gradation, select design gradation: use initial oil volume to form test piece;

[0029] (3) Design asphalt dosage selection, the asphalt dosage of hot mix asphalt mixture is between 3% and 6%, including:

[0030] ① Calculate the amount of asphalt required for the three graded asphalt mixtures wh...