Heavy asphalt warm mixing agent and preparation method thereof

Abstract

The invention provides a heavy asphalt warm mixing agent, and particularly relates to a heavy asphalt warm mixing agent and a preparation method thereof. The heavy asphalt warm mixing agent consists of raw materials in parts by weight as follows: 8-10 parts of heavy aromatics, 50-60 parts of tall oil polycarboxylic acid, 15-20 parts of diethanolamine ester, and 10-15 parts of allyl alcohol polyoxy alkyl ether. According to the preparation method provided by the invention, the tall oil polycarboxylic acid is used as a main raw material to prepare the warm mixing agent, so that the conventional limitation on raw materials of the warm mixing agent and the synergistic effect of various raw materials can be expanded, and a very small amount of the prepared warm mixing agent can be sufficiently mixed and dissolved with heavy asphalt. On the premise of not changing key technical indexes of the heavy asphalt, and the viscoelastic property and the rheological property of the asphalt, the interface tension between the asphalt and aggregates is reduced, so that the bituminous mixture mixing and pressing temperature is reduced by 20-40 DEG C, and the effects of energy conversation and emission reduction can be realized.

Description

technical field [0001] The invention provides an asphalt warm mix agent, in particular to a heavy traffic asphalt warm mix agent and a preparation method thereof. Background technique [0002] There are two main types of asphalt mixtures currently used for asphalt pavement construction and maintenance: hot mix asphalt mixture (HMA) and cold mix (normal temperature) asphalt mixture (CMA). The mixing temperature of asphalt and mineral aggregate in hot mix asphalt mixture is 150°C-185°C; cold mix (normal temperature) asphalt mixture uses emulsified asphalt or diluted asphalt as cement, and it is mixed with mineral aggregate at normal temperature (10°C-40°C). Stir and pave under the state. HMA has become the mainstream pavement technology due to its excellent road performance, but problems such as thermal aging of asphalt, exhaust gas and dust emissions, increased energy consumption and increased production costs caused by high-temperature mixing, transportation and paving have...

AI Technical Summary

Problems solved by technology

There are some deficiencies in this kind of warm mixing agent that is directly sprayed into the mixing building: 1. When the water agent is sprayed into the mixing pot, it will be heated and gasified suddenly, and the water vapor will take away part of the mineral powder, which will change the gradation and lead to the performance of the mixture. There will be some changes. The water vapor will carry the mineral powder and stick to the feeding place, which will block the feeding place and lead to inaccurate aggregate measurement. Frequent cleaning will affect the production efficiency of the mixing plant; 2. Water and water vapor will affect the adhesion of asphalt and stone. Adhesive performance, so that the water stability of asphalt mixture is damaged

This is why the existing warm mix technology can successfully produce warm mix modified asphalt, but cannot realize warm mix heavy traffic asphalt