CN102432254A - Gravity filling mortar - Google Patents

Gravity filling mortar Download PDF

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Publication number
CN102432254A
CN102432254A CN2011102922096A CN201110292209A CN102432254A CN 102432254 A CN102432254 A CN 102432254A CN 2011102922096 A CN2011102922096 A CN 2011102922096A CN 201110292209 A CN201110292209 A CN 201110292209A CN 102432254 A CN102432254 A CN 102432254A
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percent
equal
gravity
gravity placement
mortar according
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CN102432254B (en
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钱炳
黄泰东
罗小庆
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Nantong Keda Building Materials Technology Co.,Ltd.
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CHENGDU JIAXIN TECHNOLOGY CO LTD
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Abstract

The invention relates to gravity filling mortar, which is characterized by consisting of the following components in percentage by weight: 40 to 60 percent of sulphoaluminate cement, 0.05 to 1 percent of water reducing agent, 0.01 to 0.1 percent of retarder, 0.005 to 0.05 percent of early strength agent, 0.001 to 0.01 percent of stabilizer, 0.01 to 0.1 percent of antifoaming agent and the balance of aggregate. The various performance indexes of the gravity filling mortar are superior to those of the traditional filling mortar and other similar products; and initial fluidity is more than or equal to 360mm, the retention value of 30mm fluidity is more than or equal to 340mm, 2h compressive strength is more than or equal to 20MPa, 1d compressive strength is more than or equal to 50MPa, 28d compressive strength is more than or equal to 60MPa, 56d compressive strength is not less than 28d strength, 90d compressive strength is not less than 56d strength, 1d vertical expansivity is more than or equal to 0.02 percent, 28d shrinkage is less than or equal to 0.1 percent, and bleeding and settlement are avoided.

Description

A kind of gravity placement mortar
Technical field
The present invention relates to the concrete additive field, be specifically related to a kind of gravity placement mortar.
Background technology
High fluidity and HS gravity placement mortar are that " Beijing-Shanghai High-Speed Railway sound/wind barrier is with the provisional technical requirements of gravity placement mortar " of uniting issue in January, 2011 by Beijing-Shanghai High Speed Railway Co., Ltd. and China Academy of Railways Sciences is according to a kind of special engineered material that is proposed at first; Domestic how tame scientific research institution and enterprises and institutions' active development research; Obtain goodr technological breakthrough, but be difficult to satisfy simultaneously the technical requirements of each item index.For example building materials company of nation is built in Zhengzhou and Changsha hands over the gravity mortar of safe company to have 28 days preferably ultimate compression strength, and mortar degree of mobilization and early strength are all defective, and this mainly is because cement matrix and not matching of admixture component cause; The gravity mortar technical indicator of Henan Di Te Man can just reach standard-required, but does not have clear superiority, remains further to be improved.
Summary of the invention
Based on the present immature property of domestic prescription for the gravity placement mortar; The applicant is devoted to research and develop the superstrength high flowability gravity placement mortar of stable in properties; Fully satisfy each item performance index of " Beijing-Shanghai High-Speed Railway sound/wind barrier is with the provisional technical requirements of gravity placement mortar ", and realize the rank of premium grads.Make the gravity placement mortar have controlled, good flowing properties time of coagulation, high, the characteristics such as anti-fatigue performance is good, operable time is long, convenient and quick construction of early strength; Can be widely used in motorway, high-speed railway sound/wind barrier with aspects such as the anchoring of gravity placement mortar, electrified Structural Engineering, anchoring that the mast base steel plate is installed filling, heavy mechanical equipment foundation grouting, wall screw and reinforcing bar and concrete structure reinforcement, and replace existing backward products gradually.
In order to achieve the above object, the present invention has adopted following technical scheme: a kind of gravity placement mortar, and this mortar is composed of the following components by weight percentage: aluminosulfate cement 40% ~ 60%; Water reducer 0.05% ~ 1%; Retardant 0.01% ~ 0.1%, hardening accelerator 0.005% ~ 0.05%, stablizer 0.001% ~ 0.01%; Skimmer 0.01% ~ 0.1%%, surplus are aggregate.
Above-mentioned aluminosulfate cement is a strength grade more than or equal to 42.5 aluminosulfate cement.
Above-mentioned aggregate is formed by following raw materials mix by mass percentage: the haydite 20%-30% of particle diameter 0.5-3mm, 30-80 purpose silica sand 25%-40%, the river sand 30%-45% of fineness modulus 0.65-1.
Above-mentioned water reducer is selected from one or more in naphthalene series high-efficiency water-reducing agent, sulfamate water reducer and the polycarboxylate water-reducer.
Above-mentioned retardant is selected from one or more of Hydrocerol A, boric acid, Sunmorl N 60S, phosphoric acid salt and tartrate.
Above-mentioned hardening accelerator is selected from one or more in lime carbonate, Quilonum Retard, calcium formiate and the lime acetate.
The aforementioned stable agent is selected from one or more in ether of cellulose, starch and the redispersable latex powder.
Above-mentioned skimmer is selected from one or both in plain type of fluorine, the silicon defoamer.
During construction, said product is added the water stirring can use (weight ratio 0.16 of water and this product dry-mix) for slurry.
The present invention: 1. through screening, effectively improved mortar strength, and later strength continues to increase to cement raw material.2. through the screening of water reducer, improve degree of mobilization, reduced water consumption about 20%, effectively prevented the mortar shrinkage cracking.3. the rigid material that passes through to add multiple specific form structure and specific grating effectively improves mortar degree of mobilization and intensity as mortar aggregate.3. through research, realized the controllability of mortar time of coagulation and early strength to retardant, hardening accelerator.Through above measure, gravity placement mortar each item performance index of the present invention all can satisfy " Beijing-Shanghai High-Speed Railway sound/wind barrier is with the provisional technical requirements of gravity placement mortar " simultaneously, and have significant advantage aspect degree of mobilization retention value and the later stage ultimate compression strength.See table 1 with the detected result contrast of the product of existing manufacturer production:
Table 1 the present invention and existing producer product each item performance index detected result contrast table.
Figure 198171DEST_PATH_IMAGE001
Beneficial effect of the present invention is: technology is simple, has characteristics such as superstrength and high flowability.
Embodiment
Below we will combine specific embodiment that the present invention is done further explanation.
Embodiment 1
Prescription:
Strength grade is 42.5 aluminosulfate cement 400kg, and naphthalene water reducer is selected HZ-7 naphthalene series high-efficiency water-reducing agent (being produced by Sichuan Heng Ze building materials ltd) 0. 5kg, Hydrocerol A 0. 1kg for use; Calcium formiate 0.05kg; Starch 0. 01kg, plain defoamer 0. 1kg of fluorine, aggregate 599.24kg (the haydite 178.12kg of particle diameter 0.5-3mm wherein; 30-80 purpose silica sand 182.12kg, the river sand 239kg of fineness modulus 0.65-1).
During construction, said product is added the water stirring can use (weight ratio 0.16 of water and this product dry-mix) for slurry.
Embodiment 2
Prescription:
Strength grade is 42.5 aluminosulfate cement 500kg, and sulfamate water reducer is selected HZ-3 sulfamate high-effective water-reducing agent (being produced by Sichuan Heng Ze building materials ltd) 5kg, Hydrocerol A 0. 5kg for use; Calcium formiate 0.25kg; Starch 0. 05kg, silicon defoamer (YSR 3286) 0.5kg, aggregate 493.7kg (the haydite 146.35kg of particle diameter 0.5-3mm wherein; 30-80 purpose silica sand 150.35kg, the river sand 197kg of fineness modulus 0.65-1).
During construction, said product is added the water stirring can use (weight ratio 0.16 of water and this product dry-mix) for slurry.
Embodiment 3
Prescription:
Strength grade is 42.5 aluminosulfate cement 600kg, polycarboxylate water-reducer NT-201 (being produced by Suzhou Fuke New Construction Materials Co., Ltd) 10kg, Hydrocerol A 1kg; Calcium formiate 0.5kg; Starch 0. 1kg, the plain defoamer 1kg of fluorine, aggregate 387.4kg (the haydite 115kg of particle diameter 0.5-3mm wherein; 30-80 purpose silica sand 117.4kg, the river sand 155kg of fineness modulus 0.65-1).
During construction, said product is added the water stirring can use (weight ratio 0.16 of water and this product dry-mix) for slurry.
The present invention chooses the prescription of real embodiment 2, and its product has been done each item performance index detected, and sees table 2 for details.
Table 2 embodiment 2 product each item performance index detect table.
Figure 593380DEST_PATH_IMAGE002

Claims (8)

1. gravity placement mortar; It is characterized in that this mortar is composed of the following components by weight percentage: aluminosulfate cement 40% ~ 60%, water reducer 0.05% ~ 1%, retardant 0.01% ~ 0.1%; Hardening accelerator 0.005% ~ 0.05%; Stablizer 0.001% ~ 0.01%, skimmer 0.01% ~ 0.1%%, surplus is an aggregate.
2. gravity placement mortar according to claim 1 is characterized in that its strength grade of described aluminosulfate cement is more than or equal to 42.5.
3. gravity placement mortar according to claim 1; It is characterized in that said aggregate is formed by following raw materials mix by mass percentage: the haydite 20%-30% of particle diameter 0.5-3mm; 30-80 purpose silica sand 25%-40%, the river sand 30%-45% of fineness modulus 0.65-1.
4. gravity placement mortar according to claim 1 is characterized in that said water reducer is selected from one or more in naphthalene water reducer, sulfamate water reducer and the polycarboxylate water-reducer.
5. gravity placement mortar according to claim 1 is characterized in that said retardant is selected from one or more of Hydrocerol A, boric acid, Sunmorl N 60S, phosphoric acid salt and tartrate.
6. gravity placement mortar according to claim 1 is characterized in that said hardening accelerator is selected from one or more in lime carbonate, Quilonum Retard, calcium formiate and the lime acetate.
7. gravity placement mortar according to claim 1 is characterized in that said stablizer is selected from one or more in ether of cellulose, starch and the redispersable latex powder.
8. gravity placement mortar according to claim 1 is characterized in that said skimmer is selected from plain type of fluorine and/or silicon defoamer.
CN 201110292209 2011-09-29 2011-09-29 Gravity filling mortar Active CN102432254B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103539384A (en) * 2013-09-24 2014-01-29 沈阳建筑大学 Special slow condensing type super early strength pumping aid for quick-hardening sulphate aluminum cement
CN104944824A (en) * 2015-07-10 2015-09-30 重庆大学 Cement concrete early strength agent and early strength and water reduction agent
CN104987018A (en) * 2015-07-21 2015-10-21 嘉华特种水泥股份有限公司 Self-compacting concrete
CN108609973A (en) * 2018-06-05 2018-10-02 长安大学 A kind of high-strength fast hard injecting paste material for strengthening stratum
CN109534756A (en) * 2018-12-25 2019-03-29 中国铁道科学研究院集团有限公司铁道建筑研究所 A kind of quick-hardening cement volume Anchor Agent and preparation method thereof
CN112727219A (en) * 2020-12-25 2021-04-30 北京东方雨虹防水技术股份有限公司 Corrosion-resistant and waterproof protection structure and method for system of concrete structure container type structure and application

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101269943A (en) * 2008-05-12 2008-09-24 北京东方建宇混凝土科学技术研究院有限公司 High-strength grout containing superfines and preparing method
CN101486545A (en) * 2008-12-15 2009-07-22 江苏博特新材料有限公司 Expansion controllable ultra high-early strength support saddle mortar material
CN101580363A (en) * 2008-05-16 2009-11-18 中冶集团建筑研究总院 Cement-based self-leveling material capable of being used for electrostatic prevention

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101269943A (en) * 2008-05-12 2008-09-24 北京东方建宇混凝土科学技术研究院有限公司 High-strength grout containing superfines and preparing method
CN101580363A (en) * 2008-05-16 2009-11-18 中冶集团建筑研究总院 Cement-based self-leveling material capable of being used for electrostatic prevention
CN101486545A (en) * 2008-12-15 2009-07-22 江苏博特新材料有限公司 Expansion controllable ultra high-early strength support saddle mortar material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103539384A (en) * 2013-09-24 2014-01-29 沈阳建筑大学 Special slow condensing type super early strength pumping aid for quick-hardening sulphate aluminum cement
CN104944824A (en) * 2015-07-10 2015-09-30 重庆大学 Cement concrete early strength agent and early strength and water reduction agent
CN104987018A (en) * 2015-07-21 2015-10-21 嘉华特种水泥股份有限公司 Self-compacting concrete
CN104987018B (en) * 2015-07-21 2017-11-03 嘉华特种水泥股份有限公司 A kind of self-compacting concrete
CN108609973A (en) * 2018-06-05 2018-10-02 长安大学 A kind of high-strength fast hard injecting paste material for strengthening stratum
CN109534756A (en) * 2018-12-25 2019-03-29 中国铁道科学研究院集团有限公司铁道建筑研究所 A kind of quick-hardening cement volume Anchor Agent and preparation method thereof
CN112727219A (en) * 2020-12-25 2021-04-30 北京东方雨虹防水技术股份有限公司 Corrosion-resistant and waterproof protection structure and method for system of concrete structure container type structure and application

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Address after: 226600, No. 8, Nanhai Avenue, Haian Town, Haian County, Jiangsu, Nantong

Patentee after: NANTONG KEDA BUILDING MATERIALS Co.,Ltd.

Address before: 611430 A District, Xinjin County Industrial Park, Chengdu, Sichuan

Patentee before: CHENGDU JIAXIN TECHNOLOGY GROUP Co.,Ltd.

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Address after: 226600 No. 8 Nanhai Road West, Haian Town, Haian, Nantong, Jiangsu

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Patentee before: NANTONG KEDA BUILDING MATERIALS Co.,Ltd.