CN106316279A - Grouting material composition for grouting connection of reinforcing steel bar and sleeve - Google Patents

Grouting material composition for grouting connection of reinforcing steel bar and sleeve Download PDF

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Publication number
CN106316279A
CN106316279A CN201510384699.0A CN201510384699A CN106316279A CN 106316279 A CN106316279 A CN 106316279A CN 201510384699 A CN201510384699 A CN 201510384699A CN 106316279 A CN106316279 A CN 106316279A
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CN
China
Prior art keywords
grouting
agent
sleeve
water
composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510384699.0A
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Chinese (zh)
Inventor
左权
阳刚
魏金龙
刘洪亮
朱长根
刘晓
马冰洋
梁府
周曹国
金凤美
荣前
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Baoye Engineering Technology Co Ltd
Shanghai Baoye Group Corp Ltd
Original Assignee
Shanghai Baoye Engineering Technology Co Ltd
Shanghai Baoye Group Corp Ltd
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Filing date
Publication date
Application filed by Shanghai Baoye Engineering Technology Co Ltd, Shanghai Baoye Group Corp Ltd filed Critical Shanghai Baoye Engineering Technology Co Ltd
Priority to CN201510384699.0A priority Critical patent/CN106316279A/en
Publication of CN106316279A publication Critical patent/CN106316279A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a building material, and in particular to a grouting material composition. The grouting material composition for grouting connection of a reinforcing steel bar and a sleeve comprises Portland cement, river sand, a high-efficiency water reduction agent, a composite expanding agent, a mineral extra mixture, a composite rapid-hardening early strength agent, a defoaming agent and a retarder in a weight part ratio of 1:(0.4-0.8):(0.04-0.10):(0.08-0.12):(0.02-0.04):(0.03-0.05):(0.0005-0.0008):(0.006-0.010). The grouting material composition provided by the invention is capable of meeting grouting in a small space for connecting the reinforcing steel bar and the sleeve, is good in super early strength, free of shrinkage micro expansion and relatively good in holding and wrapping strength for reinforcing steel bars, and is environmental-friendly and non-toxic.

Description

The grouting material compositions that the grouting of a kind of reinforced bar sleeve connects
Technical field
The present invention relates to construction material, particularly relate to a kind of grouting material compositions.
Background technology
The connection node of prefabricated components is the theoretic weak link of prefabricated concrete structure, and the connection of longitudinal reinforcement is the key that prefabricated components connect.Longitudinal reinforcement connected mode conventional in cast-in-place concrete structure has colligation, overlaps, is welded to connect and mechanical connection etc., owing to the connecting portion of prefabricated concrete structure is less, uses these traditional bar connecting modes to be not easy to construction.
Reinforced bar sleeve grouting connects and is connected reinforcing bar and sleeve by the sleeve processed specially and reinforcing bar by injecting the interlocking that coheres between grouting material dependence material.
During reinforced bar sleeve grouting connects, space between sleeve and reinforcing bar and narrow and small, the performance of grouting material is to the safety of connector and important.
CN104402363A discloses a kind of bar connecting sleeve grouting material and preparation method thereof;CN103265253A discloses a kind of assembled architecture construction high performance grouting material, the two method is all that the coagulated material used is portland cement and sulphate aluminium cement mixes epistasis energy morning realizing grouting material according to certain ratio, but the grouting material later stage meeting retraction using the method to obtain is little, affects the durability of sleeve and bar connecting;
CN104402363A discloses a kind of high-strength iron tailings sand cement base grouting material and preparation method thereof its grouting material comprcssive strength can reach 110MPa, but this grouting material is with iron tailings sand as aggregate, maximum diameter of aggrogate 4.75mm, easily there is the phenomenon of isolation when small space is in the milk in it, and does not meets aggregate size in JG/T408-2013 " bar connecting sleeve grouting material " and be not more than the regulation of 2.36mm;
CN1019211086A discloses a kind of cement based High Strength Non-shrinking Filling Material, adds steel fibre to improve the comprcssive strength of grouting material in its match ratio, and the addition of steel fibre is not suitable for the grouting of sleeve;
CN103910511 discloses a kind of omnidistance ungauged regions high tensile reinforcement sleeve connection grouting material and CN103922660A discloses a kind of straight screw sleeve connection ungauged regions high-strength grout, above two grouting material all Shortcomings: in match ratio, expansion sources is the index expanded within entringite does not possess early stage 3h, cuts expansion rate and is not more than 0.1%;Match ratio does not contains the strongest, the component of rapid hardening, does not reaches the effect of 1d comprcssive strength >=55MPa in disclosed in it.
Summary of the invention
It is an object of the invention to overcome the defect of prior art, it is provided that the grouting material compositions that the grouting of a kind of reinforced bar sleeve connects.The grouting material of the present invention meets reinforced bar sleeve grouting branch sleeve and the grouting of reinforcing bar small space, has super hardening high-strength, and ungauged regions microdilatancy has higher bond strength, environment-protecting asepsis to reinforcing bar.
In order to solve above-mentioned technical problem, the grouting material compositions that the grouting of a kind of reinforced bar sleeve connects, it includes:
Portland cement, fluvial sand, high efficiency water reducing agent, composite expanding agent, Mineral admixture, compound fast coagulating early strength agent, defoamer and retarder, its weight ratio is 1:0.4~0.6:0.004~0.010:0.08-0.12:0.02~0.04:0.03~0.05:0.0005~0.0008:0.006-0.010;
Wherein
Portland cement is P.O52.5
Fluvial sand is the natural river sand of particle diameter≤2.36mm;
Water reducer is the carboxylic acids high efficiency water reducing agent of poly-water-reducing rate more than 25%;
Composite expanding agent is the mixture of weight ratio 99.90%-99.97%HEA anti-crack water-proof agent and the azodicarbonamide of 0.03%-0.1%;
Mineral admixture is SiO2The silicon powder of content > 99.5%, mean diameter 0.15 ~ 0.20 μm, specific surface area 15000 ~ 20000m2/kg;
Compound fast coagulating early strength agent is aluminum oxide clinker, Na2CO3, quick lime, Matrii Sulfas Exsiccatus is by weight the mixture of 1:1:0.5:0.5 grinding;
Defoamer is organic silicon defoamer powder;
Retarder is boric acid.
The grouting material grouting material of the present invention meets reinforced bar sleeve grouting branch sleeve and the grouting of reinforcing bar small space, has super hardening high-strength, and ungauged regions microdilatancy has higher bond strength, environment-protecting asepsis to reinforcing bar.To internal diameter 35mm, the connector of bar diameter 20mm is in the milk, and is in the milk closely knit, carries out drawing experimental verification and meets in JGJ107-2010 " mechanical connection technique of reinforcement code " The regulation of level joint.
Detailed description of the invention
Below, with specific embodiment, the present invention is further illustrated:
Embodiment 1
The match ratio used is (weight portion):
Portland cement P.O 52.5 1 parts;
Particle diameter is distributed as the natural river sand 0.5 part of 0~2.36mm;
The High-efficiency polycarboxylic acid water reducer of water-reducing rate > 25% 0.008 part;
The composite expanding agent 0.12 part mixture of azodicarbonamide of 99.92% anti-crack water-proof agent and 0.08% (weight ratio be);
SiO2 content > 99.5%, mean diameter 0.15 ~ 0.20 μm, the silicon powder of specific surface area 15000 ~ 20000m2/kg 0.04 part;
Aluminum oxide clinker, Na2CO, quick lime, Matrii Sulfas Exsiccatus (Na2SO4) 0.04 part of the mixture of 1:1:0.5:0.5 grinding in proportion;
0.0007 part of organic silicon defoamer powder;
Boric acid 0.008 part.
Above-mentioned raw materials is stirred through dry powder mortar mixing machine, after adding water (ratio 12%), carries out the grouting in sleeve.
It is shown in Table 1 according to the above-described embodiment 1 material property parameter after mix
The example 1 material property parameter after mix executed by table 1
Embodiment 2
The match ratio used is (weight portion):
Portland cement P.O 52.5 1 parts;
Particle diameter is distributed as the natural river sand 0.4 part of 0~2.36mm;
The High-efficiency polycarboxylic acid water reducer of water-reducing rate > 25% 0.010 part;
The composite expanding agent 0.12 part mixture of azodicarbonamide of 99.92% anti-crack water-proof agent and 0.08% (weight ratio be);
SiO2 content > 99.5%, mean diameter 0.15 ~ 0.20 μm, the silicon powder of specific surface area 15000 ~ 20000m2/kg 0.04 part;
Aluminum oxide clinker, Na2CO, quick lime, 0.05 part of the mixture of Matrii Sulfas Exsiccatus (Na2SO4) 1:1:0.5:0.5 grinding in proportion;
0.0008 part of organic silicon defoamer powder;
Boric acid 0.010 part.
Above-mentioned raw materials is stirred through dry powder mortar mixing machine, after adding water (ratio 12%), carries out the grouting in sleeve.
It is shown in Table 2. according to the above-described embodiment 2 material property parameter after mix
The example 2 material property parameter after mix executed by table 2
Embodiment 3
The match ratio used is (weight portion):
Portland cement P.O 52.5 1 parts;
Particle diameter is distributed as the natural river sand 0.6 part of 0~2.36mm;
The High-efficiency polycarboxylic acid water reducer of water-reducing rate > 25% 0.004 part;
The composite expanding agent 0.08 part mixture of azodicarbonamide of 99.92% anti-crack water-proof agent and 0.08% (weight ratio be);
SiO2 content > 99.5%, mean diameter 0.15 ~ 0.20 μm, the silicon powder of specific surface area 15000 ~ 20000m2/kg 0.03 part;
Aluminum oxide clinker, Na2CO, quick lime, 0.03 part of the mixture of Matrii Sulfas Exsiccatus (Na2SO4) 1:1:0.5:0.5 grinding in proportion;
0.0005 part of organic silicon defoamer powder;
Boric acid 0.006 part.
Above-mentioned raw materials is stirred through dry powder mortar mixing machine, after adding water (ratio 12%), carries out the grouting in sleeve.
It is shown in Table 3. according to the above-described embodiment 3 material property parameter after mix
The example 3 material property parameter after mix executed by table 3

Claims (2)

1. the grouting material compositions that a reinforced bar sleeve grouting connects, it is characterised in that it includes:
Portland cement, fluvial sand, high efficiency water reducing agent, composite expanding agent, Mineral admixture, compound fast coagulating early strength agent, defoamer and retarder, its weight ratio is 1:0.4~0.6:0.004~0.010:0.08-0.12:0.02~0.04:0.03~0.05:0.0005~0.0008:0.006-0.010;
Wherein
Portland cement is P.O52.5
Fluvial sand is the natural river sand of particle diameter≤2.36mm;
Water reducer is the carboxylic acids high efficiency water reducing agent of poly-water-reducing rate more than 25%;
Composite expanding agent is the mixture of weight ratio 99.90%-99.97%HEA anti-crack water-proof agent and the azodicarbonamide of 0.03%-0.1%;
Mineral admixture is SiO2The silicon powder of content > 99.5%, mean diameter 0.15 ~ 0.20 μm, specific surface area 15000 ~ 20000m2/kg;
Compound fast coagulating early strength agent is aluminum oxide clinker, Na2CO3, quick lime, Matrii Sulfas Exsiccatus is by weight the mixture of 1:1:0.5:0.5 grinding;
Defoamer is organic silicon defoamer powder;
Retarder is boric acid.
The grouting material compositions that a kind of reinforced bar sleeve the most according to claim 1 grouting connects, it is characterised in that described compositions in use, also needs to dilute with the water of 10% to 15% weight.
CN201510384699.0A 2015-06-30 2015-06-30 Grouting material composition for grouting connection of reinforcing steel bar and sleeve Pending CN106316279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510384699.0A CN106316279A (en) 2015-06-30 2015-06-30 Grouting material composition for grouting connection of reinforcing steel bar and sleeve

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Application Number Priority Date Filing Date Title
CN201510384699.0A CN106316279A (en) 2015-06-30 2015-06-30 Grouting material composition for grouting connection of reinforcing steel bar and sleeve

Publications (1)

Publication Number Publication Date
CN106316279A true CN106316279A (en) 2017-01-11

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1149549A (en) * 1997-07-31 1999-02-23 Mitsubishi Materials Corp Cementitious non-shrinkable high strength grout material
CN102267809A (en) * 2010-06-02 2011-12-07 中冶建筑研究总院有限公司 High strength cement mortar for connecting steel bars, and preparation method thereof
CN103482926A (en) * 2013-09-02 2014-01-01 苏州科技学院 Cement-based no-shrinkage grouting material
CN103910511A (en) * 2014-03-13 2014-07-09 东南大学 A superhigh-strength grouting material free from shrinkage in the whole course used for connection of a steel bar and a sleeve
CN103922660A (en) * 2014-03-13 2014-07-16 东南大学 Shrinkage-free ultrahigh-strength grouting material for connection of steel bar sleeves

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1149549A (en) * 1997-07-31 1999-02-23 Mitsubishi Materials Corp Cementitious non-shrinkable high strength grout material
CN102267809A (en) * 2010-06-02 2011-12-07 中冶建筑研究总院有限公司 High strength cement mortar for connecting steel bars, and preparation method thereof
CN103482926A (en) * 2013-09-02 2014-01-01 苏州科技学院 Cement-based no-shrinkage grouting material
CN103910511A (en) * 2014-03-13 2014-07-09 东南大学 A superhigh-strength grouting material free from shrinkage in the whole course used for connection of a steel bar and a sleeve
CN103922660A (en) * 2014-03-13 2014-07-16 东南大学 Shrinkage-free ultrahigh-strength grouting material for connection of steel bar sleeves

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
冯乃谦: "《实用混凝土大全》", 28 February 2011, 科学出版社 *
方坤河等: "《建筑材料 第7版》", 31 January 2015, 中国水利水电出版社 *
曹大燕等: "《土木工程检测鉴定与加固改造新进展:全国建筑物检测鉴定与加固改造第十二届学术交流会论文集》", 30 November 2014, 中国建材工业出版社 *

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