A kind of road anti-cracking water stabilization layer material containing electrolytic manganese slag and its preparation method
A technology for electrolytic manganese slag and water stabilization layer is applied in the field of cement materials, which can solve the problems of unenvironmental protection of the preparation method, and achieve the effects of reducing production cost, preventing thermal contraction stress and improving rheology.
Active Publication Date: 2020-08-04
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
[0006] The purpose of the present invention is to solve the disadvantages in the prior art that the comprehensive performance of the cement made by calcining electrolytic manganese slag and red mud needs to be improved, and the preparation method is not environmentally friendly and the cost is low.
Method used
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preparation example 1
[0044] Preparation Example 1 The composite phase change material is self-made, and its preparation method comprises the following steps:
[0045] 1. Heat and impregnate 1 part of expanded graphite in 15 parts of paraffin wax in a water bath at 80°C, stir and absorb for 2 hours, filter, dry, and grind to a particle size of 1-5mm for later use;
[0046] 2. Add 50 parts of deionized water, 20 parts of melamine and formaldehyde in a molar ratio of 1:3 to the reactor, adjust the pH to 8-9 with 10wt% sodium carbonate solution, stir at 70°C for 10-60min, and obtain a transparent pre- Polymer solution, spare;
[0047] 3. Mix the material obtained in step 1 with the prepolymer solution obtained in step 2, adjust the pH to about 4.5 with acetic acid solution, continue to stir and react at 50°C for 4 hours, adjust the pH to neutral, filter, wash with absolute ethanol, and dry to obtain Melamine coated paraffin / expanded graphite composite.
preparation example 2
[0049] All the other are identical with preparation example 1, and difference is that paraffin is 20 parts.
preparation example 3
[0051] All the other are the same as Preparation Example 1, except that the paraffin wax is 10 parts.
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Abstract
The invention discloses an electrolytic manganese slag containing anti-cracking road cement stabilized macadam material, and a cement stabilized macadam containing the electrolytic manganese slag containing anti-cracking road cement stabilized macadam material. The electrolytic manganese slag containing anti-cracking road cement stabilized macadam material comprises following raw materials, by weight, 100 parts of electrolytic manganese slag, 40 to 60 parts of red mud, and 5 to 10 parts of a composite phase change material, wherein the composite phase change material is prepared through combination of a phase change material with expandable graphite, and coating with an organic resin. According to a preparation method, the composite phase change material is added into the electrolytic manganese slag containing anti-cracking road cement stabilized macadam material, effect similar to that of a lubricant is achieved, cracking caused by thermal shrinkage stress is avoided, cement stabilized macadam temperature change is controlled, surface layer deformation is prevented, and unexpected increasing effect on cement stabilized macadam unconfined compressive strength is achieved; calcium sulfate in electrolytic manganese slag is adopted to activate active components in red mud to form a gel system, and electrolytic manganese slag harmlessness treatment is carried out, so that consumption of a large amount of industrial solid waste is realized, and road engineering raw material selection range and resource range are widened.
Description
technical field [0001] The invention relates to the field of cement materials, in particular to an anti-cracking road water stabilization layer material containing electrolytic manganese slag and a preparation method thereof. Background technique [0002] Lime is one of the main raw materials of cement. It is famous for its wide range of sources and low cost. However, with the rapid development of the economy, the Chinese economy has entered a period of high-cost growth. The increase of cement cost forces people to look for other cement substitute resources. [0003] Red mud is the residue produced after leaching alumina from bauxite, containing SiO 2 、Al 2 o 3 It is a very potential lime substitute resource. Many researchers at home and abroad have carried out the research and application of using red mud resources to prepare cement. For example, patent CN201810051563.1 discloses electrolytic manganese slag-red mud cement and its The preparation method comprises the ste...
Claims
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IPC IPC(8): C04B28/18C04B24/12C04B111/34
CPCC04B28/18C04B40/0039C04B2111/00017C04B2111/343C04B18/0409C04B18/144C04B14/024C04B2103/0071C04B24/128C04B22/002C04B14/00C04B7/02
Inventor 刘晓明张余亮徐英堂唐彬文王亚光
Owner UNIV OF SCI & TECH BEIJING