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A method for measuring the effective regeneration rate of old materials in hot recycled asphalt mixture
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A technology of asphalt mixture and thermal regeneration, which is applied in the direction of measuring devices, analysis materials, material inspection products, etc., can solve the problems of poor reliability of test results, lack of practical application value, troublesome operation process, etc.
Active Publication Date: 2020-07-24
内蒙古远通道路科技有限公司
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[0004] The invention provides a method for measuring the effective regeneration rate of old materials in thermally regenerated asphalt mixtures. The present invention effectively solves the problem of using conventional methods to calculate the effective regeneration rate of old materials. The processing method causes poor reliability of the test results and does not have practical application value
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Embodiment 1
[0040] The method for determining the effective regeneration rate of old materials in hot recycled asphalt mixture includes the following steps:
[0041] 1. Stir and heat new aggregate, new asphalt, and mineral powder, with mass percentages of 89.780%, 4.489%, and 5.731%, respectively, to prepare hot-mix asphalt mixture.
[0042] The new aggregate is limestone, and its relative density test results are shown in Table 1.
[0076] The method for determining the effective regeneration rate of old materials in hot recycled asphalt mixtures includes the following steps:
[0077] 1. Stir and heat new aggregate, new asphalt, and mineral powder, with mass percentages of 89.780%, 4.489%, and 5.731%, respectively, to prepare hot-mix asphalt mixture.
[0078] The new aggregate is limestone, and its relative density test results are shown in Table 10.
[0079] Table 10 New aggregate relative density test results
[0081] The new asphalt adopts SBS modified asphalt, and its performance index test results are shown in Table 11.
[0082] Table 11 Test results of performance indicators of SBS modified asphalt
[0083] ...
Embodiment 3
[0112] The method for determining the effective regeneration rate of old materials in hot recycled asphalt mixtures includes the following steps:
[0113] 1. Stir and heat new aggregate, new asphalt, and mineral powder, with mass percentages of 89.780%, 4.489%, and 5.731%, respectively, to prepare hot-mix asphalt mixture.
[0114] The new aggregate is limestone, and its relative density test results are shown in Table 19.
[0115] Table 19 New aggregate relative density test results
[0117] The new asphalt adopts SBS modified asphalt, and its performance index test results are shown in Table 20.
[0118] Table 20 SBS modified asphalt performance index test results
[0119] Penetratio...
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Abstract
The invention discloses a method for determining the effective regeneration rate of an old material in a heat regenerated asphalt mixture. A hot mixed asphalt mixture is prepared; a standard Marshallhitting forming method is used for preparing a Marshall test piece; the porosity of the test piece, the ore material gap rate and the asphalt saturability are tested; the content of new asphalt addedin the hot mixed asphalt mixture is determined; the heat regenerated asphalt mixture is prepared; the standard Marshall hitting forming method is used for preparing the Marshall test piece; the porosity of the test piece, the ore material gap rate and the asphalt saturability are tested; the content of new asphalt added in the heat regenerated asphalt mixture is determined; the mass of the new asphalt added into the hot mixed asphalt mixture subtracts the mass of the new asphalt added into the heat regenerated asphalt mixture to obtain the mass of the effective regeneration old asphalt; the mass of the effective regenerated old asphalt is divided by the mass of the old asphalt contained by the old materials to obtain the effective regeneration rate of the old materials. The method effectively solves the problems that the existing conventional method for obtaining the effective regeneration rate of the old materials through calculation has the complicated operation process; a simplifiedapproximate treatment method is used in many steps, so that the test result trustworthiness and reliability of the test result are poor; the practical application values are not realized.
Description
technical field [0001] The invention relates to the technical field of road engineering material detection, in particular to a method for measuring the effective regeneration rate of old materials in thermally regenerated asphalt mixtures. Background technique [0002] During the production of hot recycled mixture, the old asphalt adheres to the surface of the old aggregate, and has a certain asphalt film thickness. New asphalt and regenerant are added to the old material by spraying, and only the old asphalt on the outermost surface of the old material Contact with each other, and then with the help of mechanical stirring force, the degree of fusion of new asphalt and regenerant with old asphalt is improved, but it is still unable to completely fuse with all the old asphalt within the thickness of the old asphalt film. At this time, the asphalt film on the surface of the old aggregate Layer the inside and outside: the outer layer is an effective regenerated asphalt layer th...
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