Abstract
The bonding ability between basalt fiber bundle and asphalt mortar has a great influence on the properties of basalt fiber reinforced asphalt mixtures, yet the studies about the bonding between them is very limited. In this paper, a new test instrument called fiber-asphalt pulling machine and a new index called the nominal bonding stress (NBS) were designed and adopted to test and reveal the bonding between basalt fiber bundle and asphalt mortar. The procedures and rationality analysis of this new experiment was specified in this paper. In order to verify the reliability of the NBS index, the NBS values derived from this new test method and the rheological property indexes values of asphalt mortar under different powder–cement ratios were adopted to analyze the correlation between them. Two kinds of basalt fibers produced by two different manufacturers were adopted to conduct the parallel experiment. The results show that the nominal bonding stress between basalt fiber and asphalt mortar derived from this new test has a great correlation with the rheological properties of asphalt mortar, which also proves the credibility of this new test method and the NBS index.
Highlights
Researchers around the world have been using and developing the existing evaluation indexes of asphalt and asphalt mixtures [1,2,3] to evaluate their performance and better guide the design of the asphalt pavement
It is necessary to develop a new kind of instrument to test the bonding between the basalt fiber bundle and the asphalt mortar to better reveal the actual bonding status between the basalt fiber bundles and the asphalt mortar and get an index that could quantitatively reflect the bonding between basalt fiber and asphalt material, because a quantitative index could be used to reflect the bonding ability between basalt fiber and asphalt material more clearly
This paper aims to introduce a new test instrument [20] and method to test the bonding ability between basalt fiber bundle and asphalt mortar using a new instrument called the fiber-asphalt pulling machine, and a new index reflecting the bonding between them called nominal bonding stress (NBS) was proposed in this paper
Summary
Researchers around the world have been using and developing the existing evaluation indexes of asphalt and asphalt mixtures [1,2,3] to evaluate their performance and better guide the design of the asphalt pavement. Basalt fiber reinforced asphalt mixtures are very popular due to its good performance [15,16,17], such as the high and low temperature properties and the water stability etc. There is no doubt that the bonding ability between the basalt fiber bundle and the asphalt mortar can well reflect the reinforcing effect of the basalt fibers in the asphalt mixtures. The existing tests are mainly about the performance of the asphalt or the asphalt mixtures, the test about the bonding ability between the basalt fiber bundle and the asphalt mortar is very limited. The corresponding test data of the nominal bonding stress (NBS) obtained using the fibers provided by two different manufacturers were used to study the correlation between them and the rheological property indexes of the asphalt mortar separately to verify the reliability of this new method
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