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Solid waste phosphogypsum compound modified asphalt and preparation method thereof

A technology for compound modified asphalt and solid waste, which is applied in building structures, building components, building insulation materials, etc., can solve problems such as land occupation and environmental pollution, reduce raw material costs, simplify the process, and reduce environmental pollution. The effect of pollution

Inactive Publication Date: 2019-02-12
云南克莱默新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stacking these phosphogypsum not only takes up a lot of land, but also easily causes environmental pollution

Method used

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  • Solid waste phosphogypsum compound modified asphalt and preparation method thereof

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preparation example Construction

[0019] A method for preparing solid waste phosphogypsum composite modified asphalt, comprising the following raw material components in weight ratio: 80%-90% of petroleum heavy traffic asphalt, 3%-5% of phosphogypsum, 1%-3% of polyphosphoric acid, rubber Powder 3%-8%, polymer 2%-4%, coupling agent 0.5%-1%, and cross-linking agent 0.5%-1%;

[0020] Wherein said phosphogypsum adopts the waste slag phosphogypsum produced in the production process of wet-process phosphoric acid, and is a dried gypsum product after being calcined to remove moisture; Phosphoric acid products; the rubber powder refers to the powder obtained by crushing waste rubber products; the high molecular polymer is one or more of styrene-butadiene thermoplastic rubber, thermoplastic polyurethane rubber, rosin resin and petroleum resin a mixture; the coupling agent is one of aluminate, silane, and titanate; the crosslinking agent is sulfur, or a mixture of sulfur and maleic anhydride.

[0021] The specific prod...

Embodiment example 1

[0026] First prepare the following raw material components by weight: 84.5% petroleum heavy traffic asphalt, 5% phosphogypsum, 1% polyphosphoric acid, 4.5% rubber powder, 4% polymer, 0.5% coupling agent and 0.5% crosslinking agent ;

[0027] Prepare composite modified asphalt according to the following steps:

[0028] a. Heat petroleum heavy traffic asphalt to 190°C, put phosphogypsum and high molecular polymer into it after it melts, and stir for 2 hours with a shearing mixing head;

[0029] b. Under the condition of 150°C, put rubber powder into the material treated in step a) and stir for 1 hour;

[0030] c. Under the condition of 130°C, add polyphosphoric acid, coupling agent and crosslinking agent to the material treated in step b) and stir for 5 hours to obtain the composite modified asphalt sample 1, the sample 1 See Table 1 for technical indicators.

Embodiment example 2

[0032] First prepare the following raw material components by weight: 82% petroleum heavy traffic asphalt, 5% phosphogypsum, 2% polyphosphoric acid, 5% rubber powder, 4% polymer, 1% coupling agent and 1% crosslinking agent ;

[0033] Prepare composite modified asphalt according to the following steps:

[0034] a. Heat petroleum heavy traffic asphalt to 190°C, put phosphogypsum and high molecular polymer into it after it melts, and stir for 2 hours with a shearing mixing head;

[0035] b. Under the condition of 150°C, put rubber powder into the material treated in step a) and stir for 2 hours;

[0036] c. Under the condition of 140°C, add polyphosphoric acid, coupling agent and crosslinking agent to the material treated in step b) and stir for 6 hours to obtain the composite modified asphalt sample 2, the sample 2 See Table 1 for technical indicators.

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Abstract

The invention discloses solid waste phosphogypsum compound modified asphalt and a preparation method thereof. The solid waste phosphogypsum compound modified asphalt is prepared from the following rawmaterial ingredients in percentage by weight: 80% to 90% of petroleum heavy duty bitumen, 3% to 5% of phosphogypsum, 1% to 3% of polyphosphoric acid, 3% to 8% of rubber powder, 2% to 4% of a high-molecular polymer, 0.5% to 1% of a coupling agent and 0.5% to 1% of a crosslinking agent. Compared with the prior art, the solid waste phosphogypsum compound modified asphalt disclosed by the invention has the advantages that solid waste phosphogypsum and the rubber powder are fully utilized to modify asphalt, so that not only is the problem of treating solid waste of phosphogypsum, rubber powder andthe like solved and is environmental pollution reduced, but also pavement performance of road asphalt is further improved, and raw material cost for road construction is reduced; thus, the multiple purposes of utilizing waste, protecting environment and improving road performance are achieved. The technology has the advantages of simpleness, easiness, practicability, convenience in operation andsuitability for industrial production.

Description

technical field [0001] The invention relates to the field of road engineering materials, in particular to solid waste phosphogypsum composite modified asphalt and a preparation method thereof. Background technique [0002] Petroleum asphalt is widely used in various sectors such as transportation (roads, railways, aviation), construction, industry, etc., but due to its own defects, such as easy softening at high temperature, brittle cracking at low temperature, poor aging resistance and fatigue resistance, etc. It is too ideal. Therefore, adding modifiers to improve asphalt performance is a very effective way. Among them, the commonly used modifier is SBS, but in SBS modified asphalt, the addition of SBS is too large, which not only increases the cost, but also because SBS is A macromolecular high polymer requires more difficulty in dispersing in asphalt, which is likely to cause problems such as unstable properties of modified asphalt samples. For this reason, searching fo...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08L101/00C08K3/32
CPCC08K2003/329C08K2201/014C08L95/00C08L2205/03C08L21/00C08L101/00C08K3/32
Inventor 龙靖
Owner 云南克莱默新材料有限公司
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