Asphalt modifier in use for aggregate modification of acidity of bituminous concrete and preparation method

An asphalt modifier and acid aggregate technology, applied in the field of asphalt modifiers, can solve the problems of poor durability and high temperature stability, and achieve the effects of good durability, reduced road maintenance and stable performance

Inactive Publication Date: 2005-06-15
LUSHENG MODIFIED MATERIALS KUNMING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the effect of this product in practical application is not ideal, because the high temperature stability is not good, it is easy to decompose, and the durability is poor

Method used

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  • Asphalt modifier in use for aggregate modification of acidity of bituminous concrete and preparation method

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Embodiment

[0027] The main equipment actually used are: multi-row integrated furnace, hammer crusher, hurricane superfine self-grinding machine, maturing warehouse, batching machine, mixer, packaging machine.

[0028] There are 4 kinds of raw materials: 1. Diatomite; 2. Metakaolinite; 3. Mullite; 4. Ca(OH) 2 .

[0029] 1. Diatomite is purified, modified, activated and expanded through a "multi-row integrated furnace". The specific method is: break the block diatomaceous earth into flakes with a thickness of about 20cm, put it into a "multi-row integrated furnace", and then come out after drying, spontaneous combustion, heat preservation, and cooling. The whole process takes 9 hours. Dry for 2 hours, spontaneously ignite for 3 hours, keep warm for 2 hours, and cool down for 2 hours. The spontaneous combustion temperature is 600~800℃. After the diatomaceous earth is roasted in a "multi-row integrated furnace", it is beige. See Table 4 for various chemical components. Crush into powder by hamme...

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Abstract

An asphalt modifier for modifying the acidic aggregate of asphalt concrete is disclosed, which can increase the adhesion and stability of asphalt concrete used for pavement. It contains SiO2 (10-40 wt.%) and water (0-5 wt.%).

Description

Technical field [0001] The invention relates to an asphalt modifier, in particular to an asphalt modifier used for the modification of asphalt concrete acid aggregates and a preparation method thereof. Background technique [0002] More than 75% of the existing high-grade highways are asphalt concrete pavements. The aggregates used in this pavement include alkaline aggregates and acid aggregates. For alkaline aggregates such as limestone and dolomite, its advantages are: good adhesion to asphalt, but low ultimate compressive strength, high abrasion rate, and poor durability. And granite, basalt, andesite, diabase, gneiss and other acidic aggregates have high ultimate compressive strength and low abrasion rate. They are high-quality aggregates for high-grade highways. However, due to the SiO 2 The content is high, and it is acidic, and the adhesion to asphalt is not good, even if the raw material is in the local area, it cannot be used. In order to solve the adhesion between aspha...

Claims

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Application Information

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IPC IPC(8): C08K3/36C08L95/00E01C7/18
Inventor 于漧丁金寿
Owner LUSHENG MODIFIED MATERIALS KUNMING
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