CN110423085B - Anti-cracking water-stabilizing layer material for electrolytic manganese slag-containing road and preparation method thereof - Google Patents

Anti-cracking water-stabilizing layer material for electrolytic manganese slag-containing road and preparation method thereof Download PDF

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CN110423085B
CN110423085B CN201910860624.3A CN201910860624A CN110423085B CN 110423085 B CN110423085 B CN 110423085B CN 201910860624 A CN201910860624 A CN 201910860624A CN 110423085 B CN110423085 B CN 110423085B
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water
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electrolytic manganese
manganese slag
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CN110423085A (en
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刘晓明
张余亮
徐英堂
唐彬文
王亚光
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University of Science and Technology Beijing USTB
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017—Aspects relating to the protection of the environment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/34—Non-shrinking or non-cracking materials
    • C04B2111/343—Crack resistant materials

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention discloses an anti-cracking road water-stable layer material containing electrolytic manganese slag and a water-temperature layer containing the material. The water-stable layer material comprises the following raw materials in parts by weight: 100 parts of electrolytic manganese slag, 40-60 parts of red mud and 5-10 parts of composite phase-change material, wherein the phase-change composite material is formed by compounding the phase-change material and expanded graphite and then coating the phase-change material with organic resin. The composite phase change material is added into the material components of the water stabilizing layer, plays a role similar to that of a lubricant, can prevent cracking caused by temperature shrinkage stress, controls the temperature change of the water stabilizing layer, prevents the deformation of a surface layer, and also unexpectedly finds that the composite phase change material has an effect of improving the unconfined compressive strength of the water stabilizing layer; the calcium sulfate in the electrolytic manganese slag is utilized to activate active ingredients in the red mud to form a gel system, and the electrolytic manganese slag is subjected to harmless treatment, so that a large amount of industrial solid waste can be consumed, and the selection range and source of road engineering raw materials can be expanded.

Description

Anti-cracking water-stabilizing layer material for electrolytic manganese slag-containing road and preparation method thereof
Technical Field
The invention relates to the field of cement materials, in particular to an anti-cracking road water-stable layer material containing electrolytic manganese slag and a preparation method thereof.
Background
Lime is one of the main raw materials of cement, is famous for wide sources and low cost, but along with the rapid development of economy, Chinese economy enters a high cost increasing period, the original cheap lime raw material has a double increasing trend of the unit price, and the increase of the cement cost directly leads to the increase of the cement cost and forces people to find other cement substitute resources.
The red mud is residue generated after alumina is leached from bauxite, and contains SiO2、Al2O3Gel active ingredients are very potential lime substitute resources, and many researchers at home and abroad have developed research and application for preparing cement by utilizing red mud resources, for example, patent CN201810051563.1 discloses electrolytic manganese slag-red mud cement and a preparation method thereof, and the method comprises the steps of preparing materials; mixing manganese slag and slag powder, and carrying out the first step at 400-Calcining; adding the first calcined substance and the red mud into water, adding an alkaline modifier, and stirring to prepare slurry; settling the slurry, removing the water on the upper layer, and drying the sediment on the lower layer; mixing the dried substance and the cement raw material, and then carrying out secondary calcination; and mixing the second calcined product, the water reducing agent and the cement clinker, and then carrying out third calcination. Patent CN201210336112.5 discloses a method for producing cement by using electrolytic manganese slag and red mud, which comprises the steps of firstly calcining the electrolytic manganese slag and the red mud according to dry materials at 400-850 ℃; secondly, grinding the calcined manganese slag, the red mud slag, the granulated blast furnace slag and the manganese slag activity excitant; and grinding the cement clinker and gypsum to obtain ordinary portland cement, and finally mechanically mixing the manganese slag and red mud slag composite mineral powder with the ordinary portland cement to obtain 325 and 425 composite portland cement or ordinary portland cement.
The above patents all utilize electrolytic manganese slag-red mud to prepare cement, and have the disadvantages that the water stabilization layer prepared by using the cement is easy to generate shrinkage stress due to temperature change, the shrinkage stress cannot be released to cause deformation, the disclosed manufacturing process is complex and not environment-friendly, the generated ammonia gas cannot be effectively recycled and also pollutes the environment, and in addition, the high-temperature calcination is involved in the working procedure, so that the production cost can be further increased.
The water stable layer of the road is composed of cement and graded broken stones, is a base layer which is arranged below an asphalt surface layer and is paved by high-quality materials, bears the self weight of rock and soil and the gravity of the road surface, and the driving load transmitted from the road surface, is an important component of the whole road structure, and once the water stable layer cracks, the water stable layer not only directly influences the appearance of the road, but also reduces the mechanical property of products, so that the improvement of the cracking resistance of the cement is urgently needed to be researched and solved.
Disclosure of Invention
The invention aims to overcome the defects that the comprehensive performance of cement prepared by calcining electrolytic manganese slag and red mud needs to be improved, and the preparation method is not environment-friendly and has low cost in the prior art.
The first purpose of the invention is to provide a cement substitute which is not sensitive to temperature and has small shrinkage deformation under the influence of temperature; the second purpose of the invention is to provide a method for preparing cement by utilizing electrolytic manganese slag and metallurgical slag, which has the advantages of low cost, simple process and environmental protection.
The purpose of the invention is realized by the following technical scheme:
the water-stable layer material for the anti-cracking road comprises, by weight, 100 parts of raw material electrolytic manganese slag, 40-60 parts of red mud and 5-10 parts of a composite phase-change material, wherein the phase-change material is formed by compounding a phase-change material and expanded graphite and then coating the phase-change material with organic resin.
The electrolytic manganese slag is an industrial solid waste with high water content generated after leaching manganese ore in the production process of electrolytic manganese metal, and 8-10t of electrolytic manganese slag can be generated every 1t of manganese metal on average. The electrolytic manganese slag has complex physical and chemical properties and high manganese ion and ammonia nitrogen contents. The accumulation of the electrolytic manganese slag can cause the transfer of soluble manganese and ammonia nitrogen to soil, underground water and rivers, thereby causing serious environmental pollution.
The red mud is powdery solid residue left after alumina is leached from bauxite by strong alkali, and contains SiO2、Al2O3The gel active ingredients have very good resource potential, but the properties are very complex due to containing a large amount of strong alkaline chemical substances, so that the gel active ingredients cannot be well utilized. The red mud is used for replacing part of cement gel materials, so that the method is an effective way for realizing reduction, recycling and harmlessness, and has great economic and environmental significance. The electrolytic manganese slag is industrial waste slag rich in calcium sulfate, and can be used as a sulfate activity excitant for red mud to produce a gel material. The method adopts the electrolytic manganese slag and the red mud as main raw materials to prepare the material which can replace cement in the road water stabilization layer, on one hand, the problems that the stacking of the electrolytic manganese slag and the red mud pollutes the surrounding environment and wastes land space resources are solved, and on the other hand, the cement manufacturing cost can be reduced.
The step of compounding the phase-change material and the expanded graphite is to heat and soak the expanded graphite in the phase-change material, and the phase-change material is obtained by stirring, filtering, drying and grinding. The temperature during heating is at least above the melting point of the phase change material, preferably 60-100 ℃.
The weight ratio of the phase-change material to the expanded graphite in the composite phase-change material is 15-20:1, and the particle size of the composite phase-change material is 1-10 mm.
The phase-change material is at least one selected from paraffin, n-butyl stearate, isopropyl stearate and fatty acid.
The organic resin includes at least one of melamine resin, styrene-divinylbenzene, and epoxy resin.
The composite phase-change material is prepared by an in-situ polymerization method, and specifically, an organic resin raw material, namely a reactive monomer or a prepolymer thereof, optionally a catalyst can be added, polymerization is carried out on the surface of the expanded graphite composite material adsorbed with the phase-change material, and the organic resin is deposited on the surface of the composite material to obtain the organic resin-coated phase-change composite material. Since the monomer (or prepolymer) is soluble in a single phase, the polymer is insoluble in the entire system. And (3) beginning the reaction, carrying out monomer prepolymerization and prepolymer polymerization, and depositing the organic resin on the surface of the core material when the polymerization size of the prepolymer is gradually increased.
The monomer or prepolymer is well known to those skilled in the art, and specifically, the monomer of the melamine resin is melamine and formaldehyde; the styrene-divinylbenzene monomers are styrene and divinylbenzene; the monomer of the epoxy resin refers to bisphenol A type epoxy resin and triethylene tetramine.
In particular, the phase-change composite material may be preferably selected from the group consisting of melamine-coated paraffin/expanded graphite composite material, melamine-coated n-butyl stearate/expanded graphite composite material.
The organic resin is adopted to coat the obtained composite phase change material, so that leakage can be prevented when the phase change material is in a liquid state.
The composite phase-change material adopted by the invention can absorb or release a large amount of latent heat through the phase-change process to control the great change of the temperature of the water stable layer. Because the water stabilizing layer belongs to a semi-rigid body and has the properties of expansion with heat and contraction with cold, the temperature is reduced more and more quickly as the temperature is reduced, the generated temperature shrinkage stress is larger, the temperature shrinkage can generate great tensile stress on the surface of the exposed water stabilizing layer, the temperature shrinkage stress reaches the maximum value within the first few days of curing and forming, and if the temperature is not well controlled during curing, the cracking risk is very high; in addition, the water-stable layer has poor adhesion with the asphalt layer or the cement layer, so that the surface layer has certain shrinkage deformation, the stress of the surface layer mixture cannot be released, the temperature stress cannot be transferred to the water-stable layer, and the more the water-stable layer is accumulated, the cracking is finally caused. The composite phase change material can control the temperature change of the water stabilization layer not to be overlarge by utilizing the excellent heat storage capacity of the composite phase change material, and prevent the deformation caused by the temperature change.
The composite phase-change material adopted by the invention has the function similar to a lubricant, and can improve the rheological property of the mixture of the electrolytic manganese slag and the red mud, so that the electrolytic manganese slag and the red mud are fully mixed, and a good alkaline environment is provided for the formation of gel.
The preparation method of the water-stable layer material comprises the following steps:
firstly, adding 100 parts of electrolytic manganese slag, 20-30 parts of red mud and 5-10 parts of composite phase change material into a sealed stirrer, adding water into the stirrer for stirring, and performing suction filtration to recover ammonia gas to obtain pretreated electrolytic manganese slag;
secondly, adding 20-30 parts of red mud into the pretreated electrolytic manganese slag obtained in the first step, stirring to further consolidate heavy metals, performing suction filtration again to recover ammonia gas, and drying and pulverizing the treated electrolytic manganese slag to obtain a water stabilizing layer material;
the first step is that the red mud is utilized to fully neutralize the acidity of the fresh electrolytic manganese slag, preliminarily consolidate heavy metal ions and release ammonia gas for preliminary harmless treatment, so as to prevent the acidity, the heavy metal ions and ammonia nitrogen of the fresh electrolytic manganese slag from polluting the environment; the second step is to further fully release ammonia gas and provide alkaline conditions for further hydration of the alkaline metallurgical slag and the red mud to form ettringite and C-A-S-H gel, wherein the C-A-S-H gel is a gel material hydration product-hydrated calcium silicate (aluminum) silicate well known to persons skilled in the art. The C-A-S-H gel is used for cementing and curing heavy metal manganese ions in the electrolytic manganese slag, so that the electrolytic manganese slag is chemically stable and cannot pollute the environment.
The amount of water and the stirring time in the first step are not particularly limited, and are preferably sufficient to achieve uniform mixing without affecting the construction state, the amount of water is generally 5 to 15 parts, and the stirring time after the water is added is 1 to 10 min.
In the second step, the stirring time is 1-10 min.
The red mud is preferably Bayer process red mud with the fineness of 300-400m2/kg, pH 11-12.
The invention also provides a crack-resistant road water-stable layer which comprises the following raw materials in parts by weight: 30-60 parts of the composite phase change material, 40-60 parts of graded aggregate, 0-10 parts of cement and 10-20 parts of water, preferably 2-10 parts of cement, and more preferably 2-10 parts of portland cement.
The invention also provides a preparation method of the anti-cracking road water-stable layer, which comprises the following steps: adding 30-60 parts of electrolytic manganese slag-containing road water stabilizing layer material, 40-60 parts of graded aggregate, 0-10 parts of cement and 10-20 parts of water into a stirrer, stirring until the mixture is uniform, and compacting, forming, demoulding and film-covering maintenance after the final water content is 10-20%.
The graded aggregate comprises the following raw materials in parts by weight: 15-35 wt% of aggregate with the particle size of 0-4.75mm, 15-35 wt% of aggregate with the particle size of 4.75-10mm and 15-35 wt% of aggregate with the particle size of 10-20 mm.
The cement is 325 or 425 portland cement.
The temperature of the film covering and maintenance is 25 +/-1 ℃, and the humidity is 95 +/-1%.
Compared with the prior art, the invention has the beneficial effects that:
(1) the composite phase change material is added into the material components of the water stabilizing layer, the effect similar to that of a lubricant is achieved, cracking caused by temperature shrinkage stress during maintenance can be effectively prevented, the temperature change of the water stabilizing layer is controlled not to be overlarge, surface layer deformation caused by large temperature change of the water stabilizing layer is prevented, and the unconfined compressive strength of the water stabilizing layer is unexpectedly found to be improved.
(2) According to the invention, calcium sulfate which is abundantly present in electrolytic manganese slag is utilized to activate SiO in red mud2And Al2O3The active ingredients form a gel system to remove manganese in the electrolytic manganese slagPerforming cementing, curing and harmless treatment; the method for preparing cement by utilizing the liquid-phase reaction of the electrolytic manganese slag and the red mud not only can consume a large amount of industrial solid wastes, but also expands the selection range and the source of road engineering raw materials.
(3) The method can be used for consolidating harmful elements such as manganese ions and the like and simultaneously recovering ammonia nitrogen in the electrolytic manganese slag, and has good environmental benefit.
(4) The preparation process is simple and convenient, the preparation process is energy-saving and environment-friendly, and the prepared cement for the water stabilization layer has the performance meeting the national standard and has obvious economic benefit and social benefit.
Drawings
FIG. 1 is SEM of a water-stable layer material of example 1;
FIG. 2 is SEM of a water-stable layer material of example 2;
FIG. 3 is SEM of a water-stable layer material of example 3;
Detailed Description
The present invention will be further described with reference to the following examples, but the present invention is not limited to the descriptions in the following. Unless otherwise specified, "parts" in the examples of the present invention are parts by weight. All reagents used are commercially available in the art.
Preparation of composite phase change material
Preparation example 1The composite phase change material is self-made, and the preparation method comprises the following steps:
1.1 part of expanded graphite is heated and dipped in 15 parts of paraffin in a water bath at the temperature of 80 ℃, stirred and adsorbed for 2 hours, filtered, dried and ground until the particle size is 1-5mm for later use;
2. adding 50 parts of deionized water into the reaction kettle, wherein the molar ratio is 1: 3, regulating the pH value to 8-9 by using 10 wt% of sodium carbonate solution, and stirring for 10-60min at 70 ℃ to obtain a transparent prepolymer solution for later use;
3. and (3) mixing the material obtained in the step (1) with the prepolymer solution obtained in the step (2), adjusting the pH to about 4.5 by using an acetic acid solution, continuously stirring and reacting for 4 hours at 50 ℃, adjusting the pH to be neutral, filtering, washing by using absolute ethyl alcohol, and drying to obtain the melamine-coated paraffin/expanded graphite composite material.
Preparation example 2
The procedure was repeated, except that 20 parts of paraffin wax was used.
Preparation example 3
The procedure was repeated, except that 10 parts of paraffin wax was used.
Preparation example 4
The procedure was repeated, except that 25 parts of paraffin wax was used.
Preparation example 5
The rest is the same as the preparation example 1, except that the phase-change material paraffin is replaced by n-butyl stearate, the heating temperature is 60 ℃, and the melamine-coated n-butyl stearate/expanded graphite composite material is obtained after drying.
Comparative preparation example 1
The rest is the same as the preparation example 1, except that melamine resin coating is not carried out, and the step 2 and the step 3 in the preparation step of the composite phase change material are omitted.
Water stable layer materialPreparation of
Preparation example 6
Step one, adding 100 parts of electrolytic manganese slag, 20 parts of red mud and 5 parts of melamine-coated paraffin/expanded graphite composite material prepared in preparation example 1 into a sealed stirrer, adding 10 parts of water, stirring for 10min, and performing suction filtration to recover ammonia gas to obtain pretreated electrolytic manganese slag;
and secondly, adding 20 parts of red mud into the pretreated electrolytic manganese slag obtained in the first step, stirring for 10min to further consolidate heavy metals, performing suction filtration again to recover ammonia gas, and drying and pulverizing the treated electrolytic manganese slag to obtain the water stabilizing layer material.
Preparation example 7
The procedure of preparation example 6 was repeated, except that 7.5 parts of the melamine-coated paraffin/expanded graphite composite material prepared in preparation example 1 was used.
Preparation example 8
The procedure of preparation example 6 was repeated, except that 10 parts of the melamine-coated paraffin/expanded graphite composite material prepared in preparation example 1 was used.
Preparation example 9
The procedure of preparation example 6 was repeated, except that the melamine-coated paraffin/expanded graphite composite material was replaced with the one prepared in preparation example 2 in an amount of 7.5 parts.
Preparation example 10
The procedure of preparation example 6 was repeated, except that the melamine-coated paraffin/expanded graphite composite material was replaced with the one prepared in preparation example 3 in an amount of 7.5 parts.
Preparation example 11
The procedure of preparation example 6 was repeated, except that the melamine-coated paraffin/expanded graphite composite material was replaced with the one prepared in preparation example 4 in an amount of 7.5 parts.
Preparation example 12
The procedure was repeated, except that the melamine-coated paraffin/expanded graphite composite material was replaced with the melamine-coated n-butyl stearate/expanded graphite composite material prepared in production example 5 in an amount of 7.5 parts.
Comparative preparation example 2
The same as in preparation example 6 was repeated, except that the melamine-coated paraffin/expanded graphite composite material was not added.
Comparative preparation example 3
The procedure of preparation example 6 was repeated, except that the melamine-coated paraffin/expanded graphite composite material used in preparation example 1 was replaced with that prepared in comparative preparation example 1 in an amount of 7.5 parts.
Comparative preparation example 4
The procedure of preparation example 6 was repeated, except that 15 parts of the melamine-coated paraffin/expanded graphite composite material prepared in preparation example 1 was used.
Comparative preparation example 5
The procedure of preparation example 6 was repeated, except that 2 parts of the melamine-coated paraffin/expanded graphite composite material prepared in preparation example 1 was used.
Preparation of a Water-Stable layer
Example 1
The formula is as follows: 30 parts of the anti-cracking road water-stable layer material containing the melamine-coated paraffin/expanded graphite composite material prepared in preparation example 6, 40 parts of graded aggregate and 10 parts of water.
The preparation method comprises the following steps: adding the cement material containing the electrolytic manganese slag for the water stabilization layer of the road, the graded aggregate and water into a stirrer, stirring until the mixture is uniform, and finally compacting, forming, demoulding and film-covering maintenance after the water content is 10-20%. The temperature of the film covering and maintenance is 25 +/-1 ℃, and the humidity is 95 +/-1%.
The graded aggregate comprises the following raw materials: 35 wt% of aggregate with the particle size of 0-4.75mm, 35 wt% of aggregate with the particle size of 4.75-10mm and 30 wt% of aggregate with the particle size of 10-20 mm.
Example 2
The rest of the process was the same as example 1 except that the material for the water-stable layer was the one obtained in preparation example 7.
Example 3
The rest of the process was the same as example 1 except that the material for the water-stable layer was the one obtained in preparation example 8.
Example 4
The process is otherwise the same as in example 1, except that the hydrotable material was the one obtained in preparation example 9.
Example 5
The rest of the process was the same as example 1 except that the material for the water-stable layer was the one obtained in preparation example 10.
Example 6
The rest of the process was the same as example 1 except that the material for the water-stable layer was the one obtained in preparation example 11.
Example 7
The remainder of the process was the same as in example 1, except that 25 parts of the cement stabilizer was used as in preparation example 5, and 5 parts of 425 portland cement was also used in the formulation.
Example 8
The rest of the process was the same as example 1 except that the material for the water-stable layer was the one obtained in preparation example 12.
Comparative example 1
The remainder was the same as in example 1, except that the water-stable layer material was obtained in comparative preparation example 2.
Comparative example 2
The remainder was the same as in example 1, except that the water-stable layer material was obtained in comparative preparation example 3.
Comparative example 3
The remainder was the same as in example 1, except that the water-stable layer material was obtained in comparative preparation example 4.
Comparative example 4
The remainder was the same as in example 1, except that the water-stable layer material was obtained in comparative preparation example 5.
The above examples and comparative examples were used to prepare water-stable layers for the following tests,
temperature shrinkage test
The index reflecting the temperature shrinkage characteristic of the material is temperature shrinkage coefficient/(10)-6/℃)。
The test process is that a test piece adopts a 100mm × 100mm × 400mm standard Beam-type test piece, the test pieces in the examples and the comparative examples are maintained for 7, 28 and 90 days respectively, the test piece is saturated with water for 24 hours 1 day before the curing is finished, the initial length of the test piece is measured, then the test piece is placed in an oven to be dried to constant, the test piece is placed in a dry and ventilated place to be at normal temperature and then transferred into a high-low temperature alternating test box, the initial temperature in the test box is 60 ℃, 1 temperature gradient is divided every 10 ℃, the temperature reduction rate of 0.5 ℃/min is kept, the temperature is kept for 2 hours when each temperature gradient is reached, the dial indicator readings of 4 temperature gradients in the test box are respectively read, and the results are shown in table 1.
7-day unconfined compressive strength test
Preparing a test piece with the diameter of phi 150mm × 150mm × 150mm, curing the test piece in a constant-temperature constant-humidity curing box with the temperature of 20 +/-1 ℃ and the relative humidity of 95 +/-1% for 7 days after forming until the test piece is properly aged, and determining the unconfined compressive strength for 7 days by using a press according to T0805-1994 in the Highway engineering inorganic binder stable material test specification to obtain the unconfined compressive strength for 7 days of the mixture with different cement dosages.
28 day unconfined compressive strength test
The test conditions were determined in accordance with the above 7-day unconfined compressive strength test, and the number of days of curing was changed to 28 days, and the results are shown in Table 2.
Heavy metal and ammonia nitrogen leaching test
In the heavy metal leaching test, reference is made to HJ/T300-2007 acetic acid buffer solution method for solid waste leaching toxicity leaching method, and the acetic acid buffer solution is prepared by diluting 17.25ml of glacial acetic acid to 1L with reagent water, and the pH value of the prepared solution is 2.64 +/-0.05.
The leaching step comprises the steps of drying and grinding sample particles until the sample particles can pass through a sieve with the aperture of 9.5mm, weighing 75-100g of a sample, placing the sample in a 2L extraction bottle, calculating the volume of a required acetic acid buffer solution according to the water content of the sample and the liquid-solid ratio of 20:1 (L/kg), adding the acetic acid buffer solution, covering the bottle cap tightly, fixing the bottle cap on a turnover type oscillating device, adjusting the rotating speed to be 30 +/-2 r/min, oscillating for 18 +/-2 h at the temperature of 23 +/-2 ℃, standing for 4h, taking the leachate, and analyzing the leachate of the pavement base material by using an ICP (inductively coupled plasma) spectrometer, wherein the analysis result refers to GB L-1996 Integrated wastewater discharge Standard, and the leaching test result is shown in.
TABLE 1
Figure BDA0002199638530000081
Figure BDA0002199638530000091
TABLE 2
Figure BDA0002199638530000092
Figure BDA0002199638530000101
TABLE 3
Figure BDA0002199638530000102
As can be seen from table 1: the temperature shrinkage coefficient of the water-stable layer prepared by using the water-stable layer material containing the melamine-coated paraffin/expanded graphite composite material is smaller than that of the water-stable layer prepared by using cement without the melamine-coated paraffin/expanded graphite composite material, namely, the cement containing the melamine-coated paraffin/expanded graphite composite material has poor temperature sensitivity and strong temperature shrinkage resistance. From table 2, it is found that the cement containing the melamine coated paraffin/expanded graphite composite material also has a certain influence on the unconfined compressive strength of the water stabilization layer, and when the melamine coated paraffin/expanded graphite composite material contained in the cement is within a certain range, the unconfined compressive strength of the water stabilization layer is improved to a certain extent. Similarly, the water stable layer material containing the melamine coated n-butyl stearate/expanded graphite composite material also has similar performance.
The above detailed description is specific to one possible embodiment of the present invention, and the embodiment is not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention should be included in the technical scope of the present invention.

Claims (3)

1. The preparation method of the anti-cracking road water-stable layer material containing electrolytic manganese slag comprises the following steps:
firstly, adding 100 parts of electrolytic manganese slag, 20-30 parts of red mud and 5-10 parts of composite phase change material into a sealed stirrer, adding water into the stirrer for stirring, and performing suction filtration to recover ammonia gas to obtain pretreated electrolytic manganese slag;
secondly, adding 20-30 parts of red mud into the pretreated electrolytic manganese slag obtained in the first step, stirring to further consolidate heavy metals, performing suction filtration again to recover ammonia gas, and drying and pulverizing the treated electrolytic manganese slag to obtain a water stabilizing layer material;
the composite phase-change material is formed by compounding a phase-change material and expanded graphite and then coating the phase-change material and the expanded graphite by organic resin, wherein the weight ratio of the phase-change material to the expanded graphite in the composite phase-change material is 15-20:1, and the phase-change material is selected from at least one of paraffin, n-butyl stearate, isopropyl stearate and fatty acid; the organic resin is at least one selected from melamine resin, styrene-divinylbenzene and epoxy resin.
2. The method of claim 1, wherein the organic resin coating is formed by an in situ polymerization process.
3. The method for preparing a water-stable layer material according to claim 2, wherein the in-situ polymerization method comprises polymerizing an organic resin raw material-reactive monomer or prepolymer thereof on the surface of the expanded graphite composite material adsorbed with the phase-change material, and depositing the organic resin on the surface of the composite material to obtain the organic resin-coated phase-change composite material.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103880307A (en) * 2014-02-23 2014-06-25 桂林理工大学 Preparation method of active manganese residue micro powder
CN104725001A (en) * 2015-03-12 2015-06-24 三峡大学 Composition containing electrolytic manganese residues and application in preparation of electrolytic manganese residue non-fired and non-steam brick
CN108624292A (en) * 2018-04-24 2018-10-09 肖占英 A kind of composite phase-change energy storage material for microcapsule and preparation method thereof
CN109516736A (en) * 2018-11-30 2019-03-26 中南大学 A kind of temperature shrinkage active control type cement stabilized macadam and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103880307A (en) * 2014-02-23 2014-06-25 桂林理工大学 Preparation method of active manganese residue micro powder
CN104725001A (en) * 2015-03-12 2015-06-24 三峡大学 Composition containing electrolytic manganese residues and application in preparation of electrolytic manganese residue non-fired and non-steam brick
CN108624292A (en) * 2018-04-24 2018-10-09 肖占英 A kind of composite phase-change energy storage material for microcapsule and preparation method thereof
CN109516736A (en) * 2018-11-30 2019-03-26 中南大学 A kind of temperature shrinkage active control type cement stabilized macadam and preparation method thereof

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