High-performance asphalt mixture for steel bridge floor pavement and preparation method thereof

Abstract

The invention provides a high-performance asphalt mixture for steel bridge floor pavement and a preparation method thereof, aims to solve the problem that the conventional asphalt mixture for steel bridge floor pavement cannot be high in compactness, reliable in high temperature anti-deforming capability, excellent in low temperature deforming capability and high in fatigue-resistant capability at the same time, and belongs to the field of road engineering materials. The asphalt mixture provided by the invention comprises the following components in percentage by mass: 78.8-82.5% of an aggregate, 0.5-2.6% of an asphalt mixture anti-rut agent, 1.8-5.7% of rubber powder, 9.2-12.5% of a cementing material and 0-6.0% of a filler. The preparation method comprises the following steps: firstly, conducting heat preservation on the aggregate, heating a mixer, and then simultaneously adding the aggregate subjected to heat preservation, the asphalt mixture anti-rut agent and the rubber powder into the heated mixer for mixing; secondly, adding the cementing material for mixing; finally, adding the filler for mixing. The asphalt mixture provided by the invention is a novel asphalt mixture being low in price and simple for construction, and integrating the three properties of high compactness (waterproof capability), excellent high temperature anti-rut capability and excellent low temperature deforming capability, and particularly suitable for steel bridge floor pavement in a seasonal frost region under the high temperature and heavy-loaded traffic conditions.

Description

technical field [0001] The invention belongs to the field of road engineering materials, in particular to a high-performance asphalt mixture suitable for pavement of steel bridge decks in seasonally frozen regions and a preparation method thereof. Background technique [0002] Compared with traditional reinforced concrete bridges, steel bridges have many significant advantages. At present, steel bridges have been more and more widely used at home and abroad. [0003] Compared with ordinary road pavement, the deck pavement of steel bridges is used in a harsher environment. Therefore, the deck pavement materials of steel bridges need to have more comprehensive and excellent performance: (1) The disadvantage of steel bridges is that steel The bridge deck is easy to rust when exposed to water, so the steel bridge deck pavement material must have excellent water seepage resistance; (2) The thermal conductivity of steel is higher than other geotechnical materials, and the inner sp...

AI Technical Summary

Problems solved by technology

Compared with ordinary road pavement materials, the use conditions of steel bridge deck pavement materials in seasonally frozen areas are even harsher. Not only will they reach very high temperatures in summer, but they will also reach very low temperatures in winter, which requires pavement The pavement material must have compactness, reliable high-temperature deformation resistance, good low-temperature deformation capacity, and fatigue resistance at the same time. However, the current three types of pavement materials are only outstanding in some aspects, especially not at the same time. Performance in both aspects of low temperature, steel bridge deck pavement in seasonally frozen areas needs a material with more comprehensive and excellent performance