CN110668777A - Titanium gypsum road curing agent, and preparation and application methods thereof - Google Patents
Titanium gypsum road curing agent, and preparation and application methods thereof Download PDFInfo
- Publication number
- CN110668777A CN110668777A CN201911101539.5A CN201911101539A CN110668777A CN 110668777 A CN110668777 A CN 110668777A CN 201911101539 A CN201911101539 A CN 201911101539A CN 110668777 A CN110668777 A CN 110668777A
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- Prior art keywords
- titanium gypsum
- curing agent
- regulator
- stabilizer
- preparation
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Classifications
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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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
- E01C7/142—Mixtures or their components, e.g. aggregate
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a titanium gypsum road curing agent, a preparation method and an application method thereof, belonging to the field of road engineering, wherein the curing agent is prepared by mixing a stabilizer (industrial slag) and a regulator (sodium silicate, triethanolamine and the like) according to a certain proportion, and the hydration activity and the volcanic ash activity of active substances in the stabilizer are excited by the regulator to realize the curing of the titanium gypsum, so that the titanium gypsum is used for the filling engineering of a road pavement subbase layer.
Description
Technical Field
The invention relates to the field of road engineering, in particular to a titanium gypsum road curing agent, a preparation method and an application method thereof.
Background
Titanium gypsum is mainly industrial waste residue generated by adding lime for neutralizing acid wastewater when titanium dioxide is produced by titanium dioxide production enterprises by adopting a sulfuric acid method, and mainly contains calcium sulfate dihydrate, the titanium gypsum is grey brown when coming out of a waste residue treatment workshop and turns red after being placed in the air for a period of time (ferrous ions are gradually oxidized into ferric ions), so that titanium gypsum is named as red gypsum, the titanium gypsum has the characteristics of higher water content, more impurities and high viscosity, and is weakly acidic, and compared with natural gypsum, the titanium gypsum has higher iron content, so the titanium gypsum has the characteristics of high viscosity, easy red change when being placed in the air and the like, so that the treatment of the titanium gypsum is difficult.
In addition, the contradiction of the shortage of natural materials in most road construction is stronger day by day, and the problems of fund shortage are faced. Therefore, on one hand, the construction quality of the highway can be ensured; on the other hand, the contradiction of shortage of natural materials can be alleviated, and the construction cost is reduced; both of these aspects are considerable problems for road construction units. In addition, the implementation of the development concept that the green-water green mountain is the Jinshan Yinshan reduces the titanium gypsum stacking amount, improves the utilization rate of the titanium gypsum and protects the environment, and is also urgently needed by relevant government departments. If the titanium gypsum can be recycled and prepared into the subbase material in the road pavement structure, the cost can be reduced, the resources can be saved, and the local environmental pollution can be reduced. Therefore, the titanium gypsum used as the base layer material in the pavement construction can not only relieve the contradiction of shortage of natural materials, but also help to solve the problem of titanium gypsum treatment, and has profound social significance and environmental protection significance.
The existing traditional semi-rigid base layer generally has a shrinkage cracking phenomenon, and the shrinkage cracking of the base layer can be reflected to a surface layer, so that the road surface is cracked, inconvenience is brought to driving, and resource waste is caused. Although many scholars and experts can compensate the shrinkage cracking phenomenon by adding a small amount of titanium gypsum into the water-stable base layer, the titanium gypsum cannot effectively relieve the current problem of stacking a large amount of titanium gypsum due to the addition of a small amount of titanium gypsum, and the expansion problem is caused if a large amount of titanium gypsum is added into the water-stable base layer. Therefore, it is a considerable problem to provide a curing agent for curing titanium gypsum as a road sub-base filling.
Disclosure of Invention
The technical task of the invention is to provide a titanium gypsum road curing agent, a preparation method and an application method thereof aiming at the defects of the prior problems.
A further technical task of the present invention is to provide a process for the preparation of the above-mentioned curing agents.
A further technical task of the present invention is to provide a method for applying the above curing agent.
The technical task of the present invention is achieved in the following manner.
The titanium gypsum road curing agent is characterized by being prepared from the following raw materials in parts by weight:
90 to 95 percent of stabilizer
5 to 10 percent of regulator
The stabilizer is industrial slag, and the main components of the slag comprise the following components in percentage by mass: CaO-39.4%, Al2O3-13.5%、SiO2-26.4%、MgO-7.5%、Fe2O3-0.406%、SO31.28 percent, wherein the regulator is sodium silicate, triethanolamine or a mixture of the two, and when the regulator is a mixed reagent of triethanolamine and sodium silicate, the mass ratio of the triethanolamine to the sodium silicate is 1:1 ~ 3.
The curing agent comprises the following raw materials in percentage by mass:
94 percent of stabilizing agent
6 percent of regulator
The regulator is an alkaline compound in the prior art, but in order to achieve the best technical effect, a mixed reagent of triethanolamine and sodium silicate is preferred, and the optimal mass ratio of the triethanolamine to the sodium silicate is 1: 2.
The preparation method comprises the following steps:
(1) proportionally taking a stabilizer (industrial slag), drying at 60 ~ 80 ℃, grinding to ensure that the specific area is 400 ~ 500kg/m2And is ready for use;
(2) and (2) taking the regulator (sodium silicate, triethanolamine and the like) according to the proportion, adding the regulator into the stabilizer in the step (1), and fully mixing to obtain a curing agent finished product.
The main action mechanism of the titanium gypsum road curing agent is that under the action of the regulator, the curing agent can provide an alkaline environment for the stabilizer and excite the water of the active substanceThe chemical activity and the pozzolanic activity enable Si-O bonds and AI-O bonds in the stabilizer to be immediately broken, to rapidly participate in hydration reaction, and to be mixed with certain oxides in the titanium gypsum, thereby generating hydrated calcium silicate (C-S-H), hydrated calcium aluminate (C-A-H), hydrated calcium aluminoferrite (C-A-F-H), hydrated calcium alumino silicate (C-A-S-H), calcium hydroxide (Ca (OH)2) Hydration products such as ettringite and the like can generate coating and adsorption effects on the titanium gypsum along with the generation of the gelling substances such as C-S-H, C-A-S-H, C-A-F-H and the like, so that the titanium gypsum is solidified, and the strength of the titanium gypsum underlayer is improved. In addition, when the mixed reagent of sodium silicate and triethanolamine is selected as the optimal regulator, the triethanolamine can accelerate the early hydration reaction and improve the early strength on the one hand; on the other hand, sodium silicate is effective in preventing CaO from forming Ca (OH)2The expansion of (2) and the expansion due to the formation of ettringite, due to sodium silicate with calcium sulfate, Ca (OH)2Calcium silicate (C-S-H) gel is generated in the reaction, so that the expansion of CaO and the generation of ettringite are inhibited, and the generated gel substance can play a role in solidifying the titanium gypsum. From the above, the invention of the titanium gypsum road curing agent provides a good method for titanium gypsum as a base layer filling material, can ensure the long-term performance of a road base layer, and solves the problem of environmental pollution.
In the process of laying the titanium gypsum subbase, the titanium gypsum subbase can be added into the titanium gypsum according to a certain mass ratio and can be laid after being uniformly stirred with the titanium gypsum. The titanium gypsum sub-base layer is laid in the same process as the base layer in the prior art.
The mixing proportion of the curing agent and the titanium gypsum in the construction process is 5 percent ~ 15 percent (mass percentage).
The titanium gypsum sub-base layer preferably contains less than 2 percentage points of the optimum moisture content of the titanium gypsum.
The optimum moisture content of the titanium gypsum was determined according to Highway soil test protocol (JTG E40-2007) compaction test T0131-2007.
Compared with the prior art, the titanium gypsum road curing agent, the preparation method and the application method thereof have the following advantages:
(1) the raw material used by the titanium gypsum road curing agent is industrial waste residue, and the active substance in the stabilizer is activated mainly through the regulator, so that the titanium gypsum is cured, the titanium gypsum is used for the filling engineering of the road pavement subbase, waste is changed into valuable, and the utilization additional value of the titanium gypsum is improved;
(2) the preparation method of the curing agent is simple and easy to construct;
(3) the application method of the curing agent can be widely applied to the areas lack of soil filling and the areas with high titanium gypsum solid waste yield, can reduce the mass stacking of titanium gypsum, reduce the damage of the titanium gypsum to the environment and reduce the construction cost.
Detailed Description
The titanium gypsum curing agent, the preparation method and the application method thereof of the present invention will be described in detail with specific examples.
The first embodiment.
[ FORMULATION ]
95 percent of stabilizing agent
5 percent of regulator
The stabilizer is industrial slag; the regulator is sodium silicate.
[ PREPARATION METHOD ]
The preparation method of the titanium gypsum road curing agent is characterized by comprising the following steps:
(1) proportionally taking a stabilizer (industrial slag), drying at 60 ~ 80 ℃, grinding to ensure that the specific area is 400 ~ 500kg/m2Within the range, standby;
(2) and (3) taking a regulator (sodium silicate) according to the proportion, adding the regulator into the stabilizer obtained in the step (1), and fully mixing to obtain a curing agent finished product.
[ APPLICATION AND EFFECT ]
And (3) uniformly mixing the prepared curing agent with titanium gypsum with the optimal water content of below 2 percent according to the proportion of 10 percent, molding, curing for 7 days, and measuring the unconfined compressive strength of a test piece of 2.2Mpa in 7 days.
Example two.
[ FORMULATION ]
94 percent of stabilizing agent
6 percent of regulator
The stabilizer is industrial slag; the regulator is triethanolamine.
[ PREPARATION METHOD ]
The preparation method of the titanium gypsum road curing agent is characterized by comprising the following steps:
(1) proportionally taking a stabilizer (industrial slag), drying at 60 ~ 80 ℃, grinding to ensure that the specific area is 400 ~ 500kg/m2Within the range, standby;
(2) and (2) taking a regulator (triethanolamine) according to the proportion, adding the regulator into the stabilizer obtained in the step (1), and fully mixing to obtain a curing agent finished product.
[ APPLICATION AND EFFECT ]
And (3) uniformly mixing the prepared curing agent with titanium gypsum with the optimal water content of below 2 percent according to the proportion of 8 percent, molding, curing for 7 days, and measuring the unconfined compressive strength of a test piece of 1.6Mpa in 7 days.
Example three.
[ FORMULATION ]
90 percent of stabilizing agent
10 percent of regulator
Triethanolamine 5%
Sodium silicate 5%
The stabilizer is industrial slag; the regulator is a mixture of triethanolamine and sodium silicate, and the mixing amount of the regulator is 1:1 by mass.
[ PREPARATION METHOD ]
The preparation method of the titanium gypsum road curing agent is characterized by comprising the following steps:
(1) proportionally taking a stabilizer (industrial slag), drying at 60 ~ 80 ℃, grinding to ensure that the specific area is 400 ~ 500kg/m2Within the range, standby;
(2) and (2) taking a regulator (a mixed reagent of triethanolamine and sodium silicate) according to the proportion, adding the regulator into the stabilizer obtained in the step (1), and fully mixing to obtain a curing agent finished product.
[ APPLICATION AND EFFECT ]
And (3) uniformly mixing the prepared curing agent with titanium gypsum with the optimal water content of below 2 percent according to the proportion of 12 percent, molding, curing for 7 days, and measuring the unconfined compressive strength of a test piece of 3.1Mpa in 7 days.
Claims (3)
1. The titanium gypsum road curing agent is prepared from the following raw materials in parts by weight:
90 to 95 percent of stabilizer
5 to 10 percent of regulator
The stabilizer is industrial slag, and the main components of the slag comprise the following components in percentage by mass: CaO-39.4%, Al2O3-13.5%、SiO2-26.4%、MgO-7.5%、Fe2O3-0.406%、SO3-1.28%; the regulator is sodium silicate, triethanolamine or a mixture of the two.
2. The preparation method of the titanium gypsum road curing agent comprises the following steps:
(1) proportionally taking a stabilizer (industrial slag), drying at 60 ~ 80 ℃, grinding to ensure that the specific area is 400 ~ 500kg/m2Within the range, standby;
(2) and (2) taking the regulator (sodium silicate, triethanolamine and the like) according to the proportion, adding the regulator into the stabilizer in the step (1), and fully mixing to obtain a curing agent finished product.
3. The application method of the titanium gypsum road curing agent in claim 1, which mainly comprises the following steps:
the mixing proportion of the curing agent and the titanium gypsum in the construction process is 5 ~ 15 percent by mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911101539.5A CN110668777A (en) | 2019-11-12 | 2019-11-12 | Titanium gypsum road curing agent, and preparation and application methods thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911101539.5A CN110668777A (en) | 2019-11-12 | 2019-11-12 | Titanium gypsum road curing agent, and preparation and application methods thereof |
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| CN110668777A true CN110668777A (en) | 2020-01-10 |
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| CN201911101539.5A Pending CN110668777A (en) | 2019-11-12 | 2019-11-12 | Titanium gypsum road curing agent, and preparation and application methods thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111807737A (en) * | 2020-08-10 | 2020-10-23 | 山东理工大学 | Water-resistant composite cementing material for roads and preparation method thereof |
| CN114933462A (en) * | 2021-11-08 | 2022-08-23 | 东营天识环保科技有限公司 | Method for manufacturing roadbed base layer and subbase layer materials by utilizing titanium gypsum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111807737A (en) * | 2020-08-10 | 2020-10-23 | 山东理工大学 | Water-resistant composite cementing material for roads and preparation method thereof |
| CN114933462A (en) * | 2021-11-08 | 2022-08-23 | 东营天识环保科技有限公司 | Method for manufacturing roadbed base layer and subbase layer materials by utilizing titanium gypsum |
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