CN102849982A - Method for improving anti-separating performance of RG series cement-based grouting material components - Google Patents
Method for improving anti-separating performance of RG series cement-based grouting material components Download PDFInfo
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- CN102849982A CN102849982A CN2012103614260A CN201210361426A CN102849982A CN 102849982 A CN102849982 A CN 102849982A CN 2012103614260 A CN2012103614260 A CN 2012103614260A CN 201210361426 A CN201210361426 A CN 201210361426A CN 102849982 A CN102849982 A CN 102849982A
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Abstract
The invention discloses a method for improving anti-separating performance of RG series cement-based grouting material components. On the basis of original RG series cement-based grouting material composition, the invention introduces thickener and fine spherical mineral admixture to improve anti-separating performance. The thickener may be hydroxyethyl cellulose, methyl hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, or methyl hydroxypropyl cellulose. The mineral admixture may be granulated blast furnace slag, dry fly ash, or ground natural limestone powder. Without need of changing basic proportioning ratio of original RG series cement-based grouting material, the invention only needs proper granule sphericalization and micronizing treatment of mineral admixture and addition of proper amount of thickener, to obviously improve anti-separating performance of RG grouting material. The modified RG series grouting material can realize easy grouting under steady conditions, and high-quality grouting operation even under some harsh conditions or special environment.
Description
Technical field
The present invention relates to a kind of improvement method of RG series cement base grouting material slip component separating resistance, realize specifically the improvement of separating resistance by introducing thickening material and tiny spherical mineral admixture in original RG series cement base grouting material admixtion, belong to building material field.
Background technology
Strength cement-based grouting material refers to a class by cement, gather materials, admixture and mineral admixture are according to the formulated dry powder blend material of certain proportioning, and the water mix can be implemented the grouting operation to the position, gap between member in the construction work and the member after making mobile slip, thereby realize fixing, seam, liner, tensioning, the sealing texts, therefore, require the strength cement-based grouting material slip to have the flowability of height, separating resistance, enough initial stage swelling property require the grouting material hardenite to have high final strength and strength development speed simultaneously, the suitable performances such as sclerosis rate of expansion.Strength cement-based grouting material is widely used in, among the construction works such as the back-grouting that equipment is installed, the cementation of fissures of structures and reinforcing, screw rod anchoring, ground self-leveling cast, anti-permeation cracking-resistant, urgent leak stopping, become one of functional construction material indispensable in the building operation.
The flourish consortium in Beijing successfully develops RG series cement base grouting material through the scientific research of more than ten years, kind mainly comprises the hard high-strength grouting material of the universal grouting material of RG-G, RG-1, RG-2 and RG-A, RG-S type speed, the special speed of RG-TS hammer in slurry, RG-F anti-freeze type grouting material and RG-X heat-resistance high-strength type grouting material, and obtains good effect in long-term production and engineering construction practice.
RG series cement base grouting material has superior separating resistance, bleeding rate is 0 generally speaking, but, on-the-spot in some relatively harsher grouting, in the situation such as ambient vibration or grouting path comparison length, effect will be subject to certain limitation, and not only actual bleeding rate is difficult to guarantee with cement component separating in various degree can occur also in 0 level but also gathering materials wherein.If the separating resistance of RG series cement base grouting material further can be improved, its grouting effect in Practical Project will be significantly improved so, and range of application also will obtain larger widening.
Summary of the invention
In view of the above problems, the object of the invention is to provide a kind of improvement method of RG series cement base grouting material slip component separating resistance, contains following steps;
Realize the improvement of separating resistance by introducing thickening material and tiny spherical mineral admixture in original RG series cement base grouting material admixtion;
The basic admixtion of original RG series cement base grouting material is composed as follows: quartz sand (1-0.5mm): quartz sand (0.5-0.2mm): P II 52.5 cement: silicon ash: flyash (II level): swelling agent: water-holding agent: water reducer :=28:20:40:2:8:2:0.03:0.3.
In RG series cement base grouting material admixtion, add thickening material and tiny spherical mineral admixture; Its components by weight percent proportioning is: the volume of tackifier is 0.01-0.5; Tiny spherical mineral admixture is 5-15.
Tackifier can be Natvosols, or methyl hydroxyethylcellulose, or Type 3U, or methylhydroxypropylcellulose.
Preferably, the addition of tackifier take the RG strength cement-based grouting material as 0.01-0.5% as benchmark.
Preferably, mineral admixture is after spheroidization is processed, and the sphericity of particle should reach more than 0.80, and average particle size is 5-30 μ.
Mineral admixture can be granulated blast-furnace slag, or dry discharge fly ash, or levigate day combustion limestone powder.
Take the separating resistance improvement method of the RG series cement base grouting material that the present invention proposes, need not to change the proportioning of original RG strength cement-based grouting material, only need after wherein mineral admixture process suitable the particle shape spheroidization and fine particles processing, can significantly improve the separating resistance of RG grouting material, RG series cement base grouting material after the employing modification, not only can under smooth conditions, easily finish grouting, and can be under some exacting terms or finish the grouting operation of high-quality in the special environment.
For the method that the flowability of improving slip under the low water-cement ratio prerequisite generally adopts is added high efficiency water reducing agent exactly, still, the side effect that meanwhile produces is exactly that the separation trend of slip component significantly aggravates.The adding of an amount of tackifier can significantly improve the cohesiveness of slip, thereby improves the separating resistance of slip.Yet the introducing of excessive tackifier can cause the reduction of sclerosis grouting material intensity.Therefore, tackifier must be controlled at lower volume level.
Mineral admixture is through after the particle shape spheroidization, frictional force in whipping process between the particle significantly reduces, mobile further improvement, simultaneously, because the trend of granular downward sedimentation of gravitate in slip of particle size reduces, therefore, the separating resistance of slip component improves greatly.
In the modifying process of RG strength cement-based grouting material, the ratio of former admixtion Minerals adulterant remains unchanged.
The spheroidization of mineral admixture and fine particles processing can realize by means of stirring mill.By the primary minerals adulterant that general milling machine grinding obtains, fineness is controlled at 80 μ square hole sieves and tails over less than 5%; And then by stirring mill continuation grinding, control finish fineness mean particle size 5-30 μ.
Beneficial effect of the present invention:
Take the separating resistance improvement method of the RG series cement base grouting material that the present invention proposes, need not to change the original basic proportioning of RG grouting material, only mineral admixture process wherein need be added after an amount of tackifier simultaneously in suitable particle shape spheroidization and fine particles processing, can significantly improve the separating resistance of RG grouting material.Adopt the RG series cement base grouting material after the modification, can not only under smooth conditions, easily finish the grouting operation, and can be under some exacting terms or finish the grouting operation of high-quality in the special environment.
Embodiment
Embodiment 1:
The present invention proposes to add the mineral admixture of an amount of tackifier and process spheroidizing of particles and the processing of trickleization of particle size in RG series cement base grouting material, improve the method for its separating resistance.Concrete technical scheme is as follows:
Add an amount of tackifier in RG series cement base grouting material, tackifier can be Natvosols, or methyl hydroxyethylcellulose, or Type 3U, or methylhydroxypropylcellulose.
Preferably, the addition of tackifier take the RG strength cement-based grouting material as 0.01-0.5% as benchmark.
When adding tackifier, the mineral admixture in original RG strength cement-based grouting material batching is carried out spheroidizing of particles and the processing of trickleization of particle size.
Preferably, mineral admixture is after spheroidization is processed, and the sphericity of particle should reach more than 0.80, and average particle size is 5-30 μ.
Mineral admixture can be levigate GBFS, or fine-ground fly-ash, or levigate day combustion limestone powder, obtains the RG series cement base grouting material after the modification.
Embodiment 2:
1, the spheroidization of mineral admixture and fine particles processing:
The primary minerals adulterant that I level dry discharge fly ash (classification grade of national standard) obtains via general milling machine grinding, fineness are that 80 μ square hole sieves tail over 5%; And then by stirring mill continuation grinding, finish fineness is mean particle size 20 μ.
2, modification RG strength cement-based grouting material preparation:
According to the proportioning of RG strength cement-based grouting material, quartz sand (1-0.5mm): quartz sand (0.5-0.2mm): P II 52.5 cement: silicon ash: flyash (I I level): swelling agent: water-holding agent: water reducer :=28:20:40:2:8:2:0.03:0.3.Flyash after wherein mineral admixture is replaced as above-mentioned spheroidization and miniaturization and processes, mixing and stirring; And then add 0.3% methyl hydroxyethylcellulose on the basis of mixture, and fully stir, guarantee evenly, obtain the RG series cement base grouting material after the modification.
3, performance test:
With the RG series cement base grouting material after the aforesaid method modification, according to the strength cement-based grouting material method for testing performance of concerned countries standard code, through one by one test, the result shows, grouting material bleeding rate under the normal condition of standard code is 0; It still is 0 that the bleeding rate that records under the condition of obvious vibration is arranged around.
Other performances such as grouting material slip initial flow, hardenite intensity do not have considerable change.
Embodiment 3:
1, the spheroidization of mineral admixture and fine particles processing:
The primary minerals adulterant that natural limestone obtains via general milling machine grinding, fineness are that 80 μ square hole sieves tail over 4.5%; And then by stirring mill continuation grinding, finish fineness is mean particle size 15 μ.
2, modification RG strength cement-based grouting material preparation:
According to the proportioning of RG strength cement-based grouting material, the limestone fines after wherein mineral admixture is replaced as above-mentioned spheroidization and miniaturization and processes, mixing and stirring; And then add 0.4% methylhydroxypropylcellulose on the basis of mixture, and fully stir, guarantee evenly, obtain the RG series cement base grouting material after the modification.
3, performance test:
With the RG series cement base grouting material after the aforesaid method modification, according to the strength cement-based grouting material method for testing performance of concerned countries standard code, through one by one test, the result shows, grouting material bleeding rate under the normal condition of standard code is 0; It still is 0 that the bleeding rate that records under the condition of obvious vibration is arranged around.
Other performances such as grouting material slip initial flow, hardenite intensity do not have considerable change.
As mentioned above, embodiments of the invention are explained, but as long as not breaking away from fact inventive point of the present invention and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation also all is included within protection scope of the present invention.
Claims (7)
1. the improvement method of a RG series cement base grouting material separating resistance energy is characterized in that adding thickening material and tiny spherical mineral admixture in RG series cement base grouting material admixtion; Its components by weight percent proportioning is: the volume of tackifier is 0.01-0.5; Tiny spherical mineral admixture is 5-15.
2. improvement method according to claim 1 is characterized in that the mineral admixture in the RG grouting material is carried out spheroidizing of particles and the processing of particle granular in advance.
3. improvement method according to claim 2 is characterized in that the mineral admixture after spheroidization is processed, and the sphericity of particle should reach more than 0.80, and average particle size is 5-30 μ.
4. according to claim 2,3 described improvement methods, it is characterized in that mineral admixture is levigate GBFS, or fine-ground fly-ash, or levigate natural limestone powder.
5. improvement method according to claim 1 is characterized in that tackifier are Natvosols, or methyl hydroxyethylcellulose, or Type 3U, or methylhydroxypropylcellulose.
6. improvement method according to claim 4, the suitable volume that it is characterized in that tackifier is weight proportion 0.01-0.5.
7. improvement method according to claim 4 is characterized in that containing following steps;
The spheroidization of mineral admixture and fine particles treatment step:
The primary minerals adulterant that I level dry discharge fly ash obtains via general milling machine grinding, fineness are that 80 μ square hole sieves tail over 5%; And then by stirring mill continuation grinding, finish fineness is mean particle size 20 μ;
Modification RG strength cement-based grouting material preparation steps:
According to the mixing ratio by weight of RG strength cement-based grouting material, the flyash after wherein mineral admixture is replaced as above-mentioned spheroidization and miniaturization and processes, mixing and stirring; And then add 0.05% methyl hydroxyethylcellulose on the basis of mixture, and fully stir, guarantee evenly, can obtain the RG series cement base grouting material after the modification.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| AU2018202064B2 (en) * | 2013-04-10 | 2019-09-26 | Sika Technology Ag | Composition for use as a two component back filled grout comprising extracted silicate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102276224A (en) * | 2011-07-22 | 2011-12-14 | 中交上海三航科学研究院有限公司 | Marine engineering self-compacting high-performance concrete and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102276224A (en) * | 2011-07-22 | 2011-12-14 | 中交上海三航科学研究院有限公司 | Marine engineering self-compacting high-performance concrete and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2018202064B2 (en) * | 2013-04-10 | 2019-09-26 | Sika Technology Ag | Composition for use as a two component back filled grout comprising extracted silicate |
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Application publication date: 20130102 |