CN112794689A - Sleeve grouting material for connecting assembled construction steel bars - Google Patents
Sleeve grouting material for connecting assembled construction steel bars Download PDFInfo
- Publication number
- CN112794689A CN112794689A CN202011635432.1A CN202011635432A CN112794689A CN 112794689 A CN112794689 A CN 112794689A CN 202011635432 A CN202011635432 A CN 202011635432A CN 112794689 A CN112794689 A CN 112794689A
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- China
- Prior art keywords
- parts
- agent
- grouting material
- construction steel
- sleeve grouting
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Classifications
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a sleeve grouting material for connecting assembly type construction steel bars, which consists of the following raw materials in parts by weight: 385-containing 430 parts of cement, 80-105 parts of admixture, 450-containing 530 parts of sand, 0.05-0.2 part of water-retaining agent, 0.2-2.0 parts of defoaming agent, 1-8 parts of water reducing agent, 2-10 parts of retarder, 1-20 parts of expanding agent, 1-20 parts of early strength admixture and 145 parts of 115-containing 145 parts of mixing water. Weighing the raw materials according to a preset proportion, adding the powder into a stirrer, stirring at a low speed for 1min, uniformly mixing, adding water, and stirring for 3-5min to obtain the sleeve grouting material for connecting the fabricated construction steel bars. The obtained grouting material has excellent mechanical property.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a sleeve grouting material for connecting assembled building reinforcing steel bars.
Background
The steel bar sleeve connection is very important in the connection mode between different structural parts of the fabricated building, and the grouting material is an important component of the steel bar sleeve connection, and the performance of the grouting material is related to the comprehensive performances of the whole building structure, such as strength, earthquake resistance and the like. The main properties of the sleeve grouting material comprise fluidity, mechanical properties, volume stability and the like. In practical engineering application, the quality of the sleeve grouting material is uneven, and the strength problem is more prominent. The strength of the sleeve grouting material is improved, and the method has important significance for improving the assembly type building technology.
Disclosure of Invention
The invention aims to solve the problem that the existing sleeve grouting material is insufficient in strength and provides a high-strength assembly type construction steel bar connecting sleeve grouting material.
In order to achieve the purpose, the specific technical scheme of the invention is as follows:
the utility model provides an assembly type construction is sleeve grout material for reinforcing bar connection, characteristics are: the composite material consists of the following raw materials in parts by weight:
the cement is composed of 52.5 ordinary Portland cement and 62.5 high-alumina cement according to the mass ratio of (80-95) to (5-20);
the admixture is composed of fly ash, active silica fume and silica micropowder according to the mass ratio of (36-46) to (21-35) to (26-32);
the sand is 20-120 mesh graded sand;
the water-retaining agent is one or more of hydroxypropyl methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose;
the defoaming agent is one or two of an organic silicon defoaming agent and a polyether defoaming agent;
the water reducing agent is a powdery polycarboxylic acid water reducing agent;
the retarder is one or more of sodium tartrate, sodium citrate and sodium gluconate;
the expanding agent is one or two of a plastic expanding agent and a calcium oxide expanding agent;
the early strength agent is one or more of powder nano-micro scale calcium silicate hydrate sol, lithium carbonate and lithium nitrate.
The sleeve grouting material for connecting the assembly type construction steel bars is prepared by the following steps: weighing the raw materials according to a preset proportion, adding the powder into a stirrer, stirring at a low speed for 1min, uniformly mixing, adding water, and stirring for 3-5min to obtain the sleeve grouting material for connecting the fabricated construction steel bars.
According to the sleeve grouting material for the assembly type construction steel bar connection, provided by the invention, the nano-micro scale hydrated calcium silicate is introduced as an early strength agent, so that a C-S-H gel nucleation barrier formed by cement hydration can be greatly reduced, the cement hydration reaction rate is promoted, and the early strength of the sleeve grouting material is further improved.
The performance index of the sleeve grouting material for connecting the assembly type building reinforcing steel bars provided by the invention meets the requirements of JG/T408-plus 2013 sleeve grouting material for connecting the reinforcing steel bars, and can meet the actual engineering requirements.
Detailed Description
The present invention is further illustrated below with reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention. Various equivalent modifications of the invention, which fall within the scope of the appended claims of this application, will occur to persons skilled in the art.
Comparative example
The sleeve grouting material for connecting the assembled construction steel bars is prepared from the following raw materials in parts by weight:
weighing the raw materials in proportion, adding the powder into a stirrer, stirring at a low speed for 1min, uniformly mixing, adding water, stirring for 5min to obtain the sleeve grouting material G-0 for connecting the fabricated construction steel bars, testing the fluidity, molding, placing into a standard curing room for curing, and testing the strength and the expansion rate after reaching the specified age.
Example 1
The sleeve grouting material for connecting the assembled construction steel bars is prepared from the following raw materials in parts by weight:
weighing the raw materials according to the proportion, firstly adding the powder into a stirrer, stirring at a low speed for 1min, uniformly mixing, then adding water, stirring for 5min to obtain the sleeve grouting material G-1 for connecting the fabricated construction steel bars, testing the fluidity, molding in a mold, placing into a standard curing room for curing, and testing the strength and the expansion rate after reaching the specified age.
Example 2
The sleeve grouting material for connecting the assembled construction steel bars is prepared from the following raw materials in parts by weight:
weighing the raw materials in proportion, adding the powder into a stirrer, stirring at a low speed for 1min, uniformly mixing, adding water, stirring for 5min to obtain the sleeve grouting material G-2 for connecting the fabricated construction steel bars, testing the fluidity, molding, placing into a standard curing room for curing, and testing the strength and the expansion rate after reaching the specified age.
Example 3
The sleeve grouting material for connecting the assembled construction steel bars is prepared from the following raw materials in parts by weight:
weighing the raw materials in proportion, adding the powder into a stirrer, stirring at a low speed for 1min, uniformly mixing, adding water, stirring for 5min to obtain the sleeve grouting material G-3 for connecting the fabricated construction steel bars, testing the fluidity, molding, placing into a standard curing room for curing, and testing the strength and the expansion rate after reaching the specified age.
Example 4
The sleeve grouting material for connecting the assembled construction steel bars is prepared from the following raw materials in parts by weight:
weighing the raw materials in proportion, adding the powder into a stirrer, stirring at a low speed for 1min, uniformly mixing, adding water, stirring for 5min to obtain the sleeve grouting material G-4 for connecting the fabricated construction steel bars, testing the fluidity, molding, placing into a standard curing room for curing, and testing the strength and the expansion rate after reaching the specified age.
Example 5
The sleeve grouting material for connecting the assembled construction steel bars is prepared from the following raw materials in parts by weight:
weighing the raw materials in proportion, adding the powder into a stirrer, stirring at a low speed for 1min, uniformly mixing, adding water, stirring for 5min to obtain the sleeve grouting material G-5 for connecting the fabricated construction steel bars, testing the fluidity, molding, placing into a standard curing room for curing, and testing the strength and the expansion rate after reaching the specified age.
Effects of the implementation
The performance test results of the sleeve grouting material in the above embodiment are as follows:
from the test results of the sleeve grouting material, the compressive strength of the sleeve grouting material is obviously improved after the early strength agent is added compared with the comparative example without the powdery calcium silicate hydrate. In addition, the expansion rate index also meets the standard requirement.
Claims (5)
1. The sleeve grouting material for connecting the assembled construction steel bars is characterized by comprising the following raw materials in parts by weight:
cement 385 plus 430 parts
80-105 parts of admixture
450 portions of sand and 530 portions of sand
0.05 to 0.2 portion of water-retaining agent
0.2 to 2.0 portions of defoaming agent
1-8 parts of water reducing agent
2-10 parts of retarder
1-20 parts of expanding agent
1-20 parts of early strength agent
Mixing water 115 and 145 portions; wherein:
the cement is composed of 52.5 ordinary Portland cement and 62.5 high-alumina cement according to the mass ratio of (80-95) to (5-20);
the admixture is composed of fly ash, active silica fume and silica micropowder according to the mass ratio of (36-46) to (21-35) to (26-32);
the early strength agent is one or more of powder nano-micro scale calcium silicate hydrate sol, lithium carbonate and lithium nitrate;
the water-retaining agent is one or more of hydroxypropyl methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose;
the defoaming agent is one or two of an organic silicon defoaming agent and a polyether defoaming agent.
2. The fabricated construction rebar junction sleeve grout of claim 1, wherein the sand is 20-120 mesh grade sand.
3. The assembly type sleeve grouting material for connecting construction steel bars according to claim 1, wherein the retarder is one or more of sodium tartrate, sodium citrate and sodium gluconate.
4. The fabricated construction steel bar connection sleeve grout material as claimed in claim 1, wherein the expanding agent is one or two of a plastic expanding agent and a calcium oxide expanding agent.
5. The sleeve grouting material for assembled construction steel bar connection according to claim 1, which is prepared by the following steps: weighing the raw materials according to a preset proportion, adding the powder into a stirrer, stirring at a low speed for 1min, uniformly mixing, adding water, and stirring for 3-5min to obtain the sleeve grouting material for connecting the fabricated construction steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011635432.1A CN112794689A (en) | 2020-12-31 | 2020-12-31 | Sleeve grouting material for connecting assembled construction steel bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011635432.1A CN112794689A (en) | 2020-12-31 | 2020-12-31 | Sleeve grouting material for connecting assembled construction steel bars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112794689A true CN112794689A (en) | 2021-05-14 |
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| CN202011635432.1A Pending CN112794689A (en) | 2020-12-31 | 2020-12-31 | Sleeve grouting material for connecting assembled construction steel bars |
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Citations (11)
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|---|---|---|---|---|
| JP2014129209A (en) * | 2012-12-28 | 2014-07-10 | Taiheiyo Material Kk | Grout composition and grout material |
| CA2928536A1 (en) * | 2013-10-30 | 2015-05-07 | Huntsman Petrochemical Llc | Admixture composition to improve strength of cement cured products |
| CN105622006A (en) * | 2015-12-14 | 2016-06-01 | 江苏苏博特新材料股份有限公司 | Low-temperature early-strength high-strength underwater grouting material |
| CN107572941A (en) * | 2017-08-28 | 2018-01-12 | 洛阳理工学院 | Special grouting material of microdilatancy assembled architecture reinforcing steel bar connecting sleeve tube and preparation method thereof |
| CN107572910A (en) * | 2017-08-28 | 2018-01-12 | 安宁鼎翔新材料科技有限公司 | A kind of high-performance assembled architecture reinforced bar sleeve grouting material and its application method |
| CN108314393A (en) * | 2018-03-20 | 2018-07-24 | 中冶建筑研究总院有限公司 | A kind of low temperature environment bar connecting grouting material and its preparation method and application |
| CN108947423A (en) * | 2018-08-30 | 2018-12-07 | 成都宏基建材股份有限公司 | A kind of reinforcing bar sleeve for connection grouting material of high fluidity and preparation method thereof |
| CN109020420A (en) * | 2018-08-30 | 2018-12-18 | 成都宏基建材股份有限公司 | A kind of reinforcing bar sleeve for connection grouting material and preparation method thereof with rust prevention function |
| CN109180114A (en) * | 2018-08-30 | 2019-01-11 | 成都宏基建材股份有限公司 | A kind of reinforcing bar sleeve for connection grouting material and preparation method thereof |
| CN109574605A (en) * | 2018-12-27 | 2019-04-05 | 苏州弗克技术股份有限公司 | A kind of assembled architecture superelevation strength grouting material |
| CN109665780A (en) * | 2019-01-28 | 2019-04-23 | 上海恒福科技发展有限公司 | A kind of high flowability reinforcing steel bar connecting sleeve tube grouting material and preparation method thereof |
-
2020
- 2020-12-31 CN CN202011635432.1A patent/CN112794689A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2014129209A (en) * | 2012-12-28 | 2014-07-10 | Taiheiyo Material Kk | Grout composition and grout material |
| CA2928536A1 (en) * | 2013-10-30 | 2015-05-07 | Huntsman Petrochemical Llc | Admixture composition to improve strength of cement cured products |
| CN105622006A (en) * | 2015-12-14 | 2016-06-01 | 江苏苏博特新材料股份有限公司 | Low-temperature early-strength high-strength underwater grouting material |
| CN107572941A (en) * | 2017-08-28 | 2018-01-12 | 洛阳理工学院 | Special grouting material of microdilatancy assembled architecture reinforcing steel bar connecting sleeve tube and preparation method thereof |
| CN107572910A (en) * | 2017-08-28 | 2018-01-12 | 安宁鼎翔新材料科技有限公司 | A kind of high-performance assembled architecture reinforced bar sleeve grouting material and its application method |
| CN108314393A (en) * | 2018-03-20 | 2018-07-24 | 中冶建筑研究总院有限公司 | A kind of low temperature environment bar connecting grouting material and its preparation method and application |
| CN108947423A (en) * | 2018-08-30 | 2018-12-07 | 成都宏基建材股份有限公司 | A kind of reinforcing bar sleeve for connection grouting material of high fluidity and preparation method thereof |
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| CN109574605A (en) * | 2018-12-27 | 2019-04-05 | 苏州弗克技术股份有限公司 | A kind of assembled architecture superelevation strength grouting material |
| CN109665780A (en) * | 2019-01-28 | 2019-04-23 | 上海恒福科技发展有限公司 | A kind of high flowability reinforcing steel bar connecting sleeve tube grouting material and preparation method thereof |
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Application publication date: 20210514 |