CN104788072A - Early-strength type aluminate cement based self-leveling material - Google Patents
Early-strength type aluminate cement based self-leveling material Download PDFInfo
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- CN104788072A CN104788072A CN201510120035.3A CN201510120035A CN104788072A CN 104788072 A CN104788072 A CN 104788072A CN 201510120035 A CN201510120035 A CN 201510120035A CN 104788072 A CN104788072 A CN 104788072A
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- 239000004568 cement Substances 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 title claims abstract description 31
- 150000004645 aluminates Chemical class 0.000 title claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000006004 Quartz sand Substances 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 14
- 239000010440 gypsum Substances 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000003469 silicate cement Substances 0.000 claims description 13
- 239000013530 defoamer Substances 0.000 claims description 10
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 10
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 10
- 239000004816 latex Substances 0.000 claims description 10
- 229920000126 latex Polymers 0.000 claims description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 8
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 8
- 239000011505 plaster Substances 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical group OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 4
- 229940095064 tartrate Drugs 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- 239000011398 Portland cement Substances 0.000 abstract 1
- 239000002518 antifoaming agent Substances 0.000 abstract 1
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 239000000839 emulsion Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000004570 mortar (masonry) Substances 0.000 description 19
- 150000001735 carboxylic acids Chemical class 0.000 description 7
- 238000011056 performance test Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 229910001653 ettringite Inorganic materials 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to an early-strength type aluminate cement based self-leveling material which is characterized by comprising the following raw material components in parts by weight: 300-340 parts of aluminate cement, 40-60 parts of gypsum, 20-60 parts of portland cement, 380-420 parts of quartz sand, 180-220 parts of a heavy calcium carbonate powder, 8-20 parts of a redispersible emulsion powder, 2-2.4 parts of a water reducing agent, 0.15-0.25 part of a water-retaining agent, 1.5-2.5 parts of a defoaming agent, and 0-0.4 part of a retarder, wherein the water-material mass ratio is 0.18-0.19. The self-leveling material has the characteristics of good fluidity, high surface flatness, good stability, fast condensation hardening speed, high early strength, small volume shrinkage rate and the like, and can be used as a ground leveling material and a grouting repairing material.
Description
Technical field
The present invention relates to a kind of early-strength type aluminate cement based self-leveling material.
Background technology
Cement-based self-leveling material is base material with cement, adds aggregate, mineral-filled material and chemical admixture and is prepared from.Add water according to the ratio of regulation during use and stir or powder and liquid material are stirred, after mechanical pumping or artificial construction, without the need to Manual, vibrate smooth, the automatic levelling of the high fluidity by slurry forms smooth plane, can be used as floor material or grouting patching material.
The performance of gelling system to self-leveling material plays conclusive effect, and silicate cement strength development is slow, and after sclerosis, cubic deformation is comparatively large, easily occurs shrinkage cracking.Aluminate cement setting rate is fast, and early strength is high, and Sulphate-resistant property is strong.But its hydrated product easily crystal conversion occurs, affect the porosity of Behavior of Hardened Cement Paste, cause later strength retraction.When aluminate cement, silicate cement, gypsum are used in combination, can react between three generation ettringite, is conducive to promoting strength development and compensate for volume shrinkage.In the gelling system based on aluminate cement, the volume of gypsum determines the growing amount of ettringite; Silicate cement provides a large amount of calcium hydroxide in hydration process, can participate in reacting and promote the formation of ettringite, effectively can also improve the stability of gravity flowing levelling mortar, reduce segregation and bleeding.Semi-hydrated gypsum dissolution rate, faster than without water anhydrite and dihydrate gypsum, promotes that mortar early strength develops, compensate for volume shrinkage effect is more remarkable.But volume is crossed and operable time can be made at most to shorten, and even produces false set, also need adulterated appropriate retardant to control the time of coagulation of mortar.
Therefore, the aluminate cement based self-leveling material that proportioning is suitable has the features such as good workability, setting rate is fast, structure degree of compactness is high, volume stability is good, can be used for floor leveling, repairing concrete crack and rush repair engineering.
Summary of the invention
The object of this invention is to provide a kind of early-strength type aluminate cement based self-leveling material.
Technical scheme of the present invention is: a kind of early-strength type aluminate cement based self-leveling material, it is characterized in that the weight part of its feed composition and each component is respectively as follows: 300 ~ 340 parts of aluminate cements, 40 ~ 60 parts of gypsum, 20 ~ 60 parts of silicate cements, 380 ~ 420 parts of quartz sand, 180 ~ 220 dicalcium powders, 8 ~ 20 parts of redispersable latex powders, 2 ~ 2.4 parts of water reducers, 0.15 ~ 0.25 water-holding agent, 1.5 ~ 2.5 parts of defoamers, retardant 0 ~ 0.4 part; Water material mass ratio is 0.18 ~ 0.19.
Preferably above-mentioned aluminate cement is CA50 level; Silicate cement model is 42.5 grades or 52.5 grades; Preferred gypsum is alpha-semi water plaster stone or β-semi-hydrated gypsum.
Preferably above-mentioned quartz sand has two kinds, is respectively 40 ~ 60 orders and 60 ~ 120 orders, in mass ratio 1:(0.65 ~ 1.55) used in combination.
Preferably described dicalcium powder order number is 400 orders.Preferably described can point latex powder be " Wa Ke " again
5044N (VAE), " Wa Ke "
one in 5010N (VAE); Water reducer is high-efficiency water-reducing agent of poly-carboxylic acid; Defoamer is
p803 powder defoamer; One in hydroxypropyl methyl cellulose ether (HPMC), range of viscosities 60000 ~ 100000mpa.s; Retardant is tartrate retardant.
The dry powder of gravity flowing levelling mortar by described each component in mass ratio Homogeneous phase mixing form, carry out the fabrication & properties test of mortar by JC/T985-2005 " ground cement-based self-leveling mortar " industry standard.
Beneficial effect:
Initial flow degree and 20min all reach rower requirement, have enough operable times; The stability of mortar is high, and without segregation and bleeding, surface finish is high; Setting and harden speed is fast and early strength is high, and 1d ultimate compression strength can reach 30MPa, and later strength still has larger enhancement rate.
Embodiment
Embodiment 1
By mass, proportioning is as follows: the aluminate cement 340 parts of CA50, alpha-semi water plaster stone 40 parts, P II 52.5 silicate cement 20 parts, 40 ~ 60 order quartz sand 150 parts, 60 ~ 120 order quartz sand 230 parts, 400 order dicalcium powder 220 parts, " Wa Ke "
5044N redispersable latex powder 8 parts, HY poly carboxylic acid powder water reducer 2 parts,
p803 powder defoamer 1.5 parts, hydroxypropyl methyl cellulose ether water-holding agent (viscosity is 80000mpa.s) 0.25 part, water material mass ratio is 0.18.Mortar preparation and performance test are undertaken by JC/T985-2005 " ground cement-based self-leveling mortar " industry standard.
Embodiment 2
By mass, proportioning is as follows: the aluminate cement 340 parts of CA50, β-semi-hydrated gypsum 40 parts, P II 52.5 silicate cement 20 parts, 40 ~ 60 order quartz sand 190 parts, 60 ~ 120 order quartz sand 190 parts, 400 order dicalcium powder 220 parts, " Wa Ke "
5044N redispersable latex powder 8 parts, HY poly carboxylic acid powder water reducer 2 parts,
p803 powder defoamer 1.5 parts, hydroxypropyl methyl cellulose ether water-holding agent (viscosity is 80000mpa.s) 0.25 part, water material mass ratio is 0.185.Mortar preparation and performance test are undertaken by JC/T985-2005 " ground cement-based self-leveling mortar " industry standard.
Embodiment 3
By mass, proportioning is as follows: the aluminate cement 320 parts of CA50, alpha-semi water plaster stone 60 parts, P II 52.5 silicate cement 20 parts, 40 ~ 60 order quartz sand 200 parts, 60 ~ 120 order quartz sand 200 parts, 400 order dicalcium powder 200 parts, " Wa Ke "
5044N redispersable latex powder 12 parts, HY poly carboxylic acid powder water reducer 2 parts,
p803 powder defoamer 1.5 parts, hydroxypropyl methyl cellulose ether water-holding agent (viscosity is 80000mpa.s) 0.2 part, water material mass ratio is 0.18.Mortar preparation and performance test are undertaken by JC/T985-2005 " ground cement-based self-leveling mortar " industry standard.
Embodiment 4
By mass, proportioning is as follows: the aluminate cement 320 parts of CA50, β-semi-hydrated gypsum 40 parts, P II 52.5 silicate cement 40 parts, 40 ~ 60 order quartz sand 200 parts, 60 ~ 120 order quartz sand 200 parts, 400 order dicalcium powder 200 parts, " Wa Ke "
5010N redispersable latex powder 12 parts, HY poly carboxylic acid powder water reducer 2.4 parts,
p803 powder defoamer 2 parts, hydroxypropyl methyl cellulose ether water-holding agent (viscosity is 80000mpa.s) 0.2 part, water material mass ratio is 0.19.Mortar preparation and performance test are undertaken by JC/T985-2005 " ground cement-based self-leveling mortar " industry standard.
Embodiment 5
By mass, proportioning is as follows: CA50 aluminate cement 300 parts, alpha-semi water plaster stone 60 parts, P II 52.5 silicate cement 40 parts, 40 ~ 60 order quartz sand 250 parts, 60 ~ 120 order quartz sand 170 parts, 400 order dicalcium powder 180 parts, " Wa Ke "
5044N redispersable latex powder 20 parts, HY poly carboxylic acid powder water reducer 2 parts,
p803 powder defoamer 2.5 parts, hydroxypropyl methyl cellulose ether water-holding agent (viscosity is 80000mpa.s) 0.15 part, tartrate retardant 0.4 part, water material mass ratio is 0.18.Mortar preparation and performance test are undertaken by JC/T985-2005 " ground cement-based self-leveling mortar " industry standard.Embodiment 6
By mass, proportioning is as follows: CA50 aluminate cement 300 parts, β-semi-hydrated gypsum 40 parts, PO42.5 silicate cement 60 parts, 40 ~ 60 order quartz sand 250 parts, 60 ~ 120 order quartz sand 170 parts, 400 order dicalcium powder 180 parts, " Wa Ke "
5010N redispersable latex powder 20 parts, HY poly carboxylic acid powder water reducer 2.4 parts,
p803 powder defoamer 2.5 parts, hydroxypropyl methyl cellulose ether water-holding agent (viscosity is 60000mpa.s) 0.15 part, tartrate retardant 0.4 part, water material mass ratio is 0.185.Mortar preparation and performance test are undertaken by JC/T985-2005 " ground cement-based self-leveling mortar " industry standard.
Embodiment performance is as following table:
Claims (6)
1. an early-strength type aluminate cement based self-leveling material, is characterized in that the weight part of its feed composition and each component is respectively as follows: 300 ~ 340 parts of aluminate cements, 40 ~ 60 parts of gypsum, 20 ~ 60 parts of silicate cements, 380 ~ 420 parts of quartz sand, 180 ~ 220 dicalcium powders, 8 ~ 20 parts of redispersable latex powders, 2 ~ 2.4 parts of water reducers, 0.15 ~ 0.25 water-holding agent, 1.5 ~ 2.5 parts of defoamers, retardant 0 ~ 0.4 part; Water material mass ratio is 0.18 ~ 0.19.
2. early-strength type aluminate cement based self-leveling material according to claim 1, is characterized in that described aluminate cement is CA50 level; Silicate cement model is 42.5 grades or 52.5 grades.
3. early-strength type aluminate cement based self-leveling material according to claim 1, is characterized in that described gypsum is alpha-semi water plaster stone or β-semi-hydrated gypsum.
4. early-strength type aluminate cement based self-leveling material according to claim 1, is characterized in that described quartz sand is 40 ~ 60 orders and 60 ~ 120 object mixtures; Wherein 40 ~ 60 orders and 60 ~ 120 orders 1:(0.65 ~ 1.55 in mass ratio) used in combination.
5. early-strength type aluminate cement based self-leveling material according to claim 1, is characterized in that the order number of described dicalcium powder is 400 orders.
6. early-strength type aluminate cement based self-leveling material according to claim 1, is characterized in that described redispersable latex powder is for " Wa Ke "
or " Wa Ke "
in one; Water reducer is high-efficiency water-reducing agent of poly-carboxylic acid; Defoamer is
powder defoamer; Water-holding agent is hydroxypropyl methyl cellulose ether (HPMC), range of viscosities 60000 ~ 100000mpa.s; Retardant is tartrate retardant.
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| CN201510120035.3A CN104788072A (en) | 2015-03-18 | 2015-03-18 | Early-strength type aluminate cement based self-leveling material |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106587871A (en) * | 2016-11-03 | 2017-04-26 | 南京工业大学 | Self-leveling mortar terrace material used for under-floor heating facilities |
| CN106747173A (en) * | 2016-11-10 | 2017-05-31 | 广西柏睿通建材科技有限公司 | A kind of self-leveling cement basic ring protects terrace mortar |
| CN107311580A (en) * | 2017-08-24 | 2017-11-03 | 合肥翠鸟节能建材有限公司 | A kind of common self-leveling material of bottom |
| CN107540329A (en) * | 2017-09-26 | 2018-01-05 | 河南兴安新型建筑材料有限公司 | Quick-hardening cement based self-leveling mortar |
| CN107572992A (en) * | 2017-09-20 | 2018-01-12 | 西安建筑科技大学 | A kind of concrete repairing material for being applicable marine environment and preparation method thereof |
| CN108083746A (en) * | 2017-12-06 | 2018-05-29 | 诺弗斯绝热材料有限公司 | A kind of surface layer high intensity self-leveling material and preparation method thereof |
| CN108178590A (en) * | 2018-02-08 | 2018-06-19 | 灵猫（广州）新材料科技有限公司 | It is a kind of to polish the high performance cement base self leveling material with metal sense |
| CN108341639A (en) * | 2018-04-12 | 2018-07-31 | 江苏兆佳建材科技有限公司 | A kind of early-strength cement base thick-layer leveling mortar and application method |
| CN108911685A (en) * | 2018-09-17 | 2018-11-30 | 佛山皖和新能源科技有限公司 | A kind of preparation method of gypsum-based self-leveling material |
| CN109354471A (en) * | 2018-11-21 | 2019-02-19 | 君旺节能科技股份有限公司 | A kind of lower shrinkage self-compaction super hardening mending mortar and its construction technology |
| CN110357544A (en) * | 2019-07-15 | 2019-10-22 | 天津炬实科技发展股份有限公司 | A kind of upper flow regime cracking resistance early-strength repairing mortar and preparation method thereof |
| CN110590302A (en) * | 2019-10-10 | 2019-12-20 | 兰溪市昆仑工程材料有限公司 | Grouting plugging agent and preparation method thereof |
| CN110845206A (en) * | 2019-12-09 | 2020-02-28 | 成都宏基建材股份有限公司 | Cement millstone terrace material and production method thereof |
| CN111574171A (en) * | 2020-04-09 | 2020-08-25 | 张家港弗克新型建材有限公司 | Waterproof self-leveling mortar for surface layer and preparation method thereof |
| CN111592309A (en) * | 2019-04-29 | 2020-08-28 | 中建材创新科技研究院有限公司 | Heat-preservation gypsum self-leveling mortar and preparation method thereof |
| CN112266225A (en) * | 2020-11-03 | 2021-01-26 | 苏州恒祥环境工程有限公司 | Preparation method of extremely-fast-setting super-early-strength facade repair material |
| CN112592146A (en) * | 2021-01-12 | 2021-04-02 | 江苏顺丽成建筑新材料有限公司 | Self-leveling terrace repairing material |
| CN113698158A (en) * | 2021-06-16 | 2021-11-26 | 上海培宏公路养护技术有限公司 | Fast-hardening high-performance hinge joint filling material |
| CN116283082A (en) * | 2023-02-16 | 2023-06-23 | 中交四航工程研究院有限公司 | Self-leveling mortar and preparation method and application thereof |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106587871A (en) * | 2016-11-03 | 2017-04-26 | 南京工业大学 | Self-leveling mortar terrace material used for under-floor heating facilities |
| CN106747173A (en) * | 2016-11-10 | 2017-05-31 | 广西柏睿通建材科技有限公司 | A kind of self-leveling cement basic ring protects terrace mortar |
| CN107311580A (en) * | 2017-08-24 | 2017-11-03 | 合肥翠鸟节能建材有限公司 | A kind of common self-leveling material of bottom |
| CN107572992A (en) * | 2017-09-20 | 2018-01-12 | 西安建筑科技大学 | A kind of concrete repairing material for being applicable marine environment and preparation method thereof |
| CN107540329A (en) * | 2017-09-26 | 2018-01-05 | 河南兴安新型建筑材料有限公司 | Quick-hardening cement based self-leveling mortar |
| CN108083746A (en) * | 2017-12-06 | 2018-05-29 | 诺弗斯绝热材料有限公司 | A kind of surface layer high intensity self-leveling material and preparation method thereof |
| CN108178590A (en) * | 2018-02-08 | 2018-06-19 | 灵猫（广州）新材料科技有限公司 | It is a kind of to polish the high performance cement base self leveling material with metal sense |
| CN108341639A (en) * | 2018-04-12 | 2018-07-31 | 江苏兆佳建材科技有限公司 | A kind of early-strength cement base thick-layer leveling mortar and application method |
| CN108911685A (en) * | 2018-09-17 | 2018-11-30 | 佛山皖和新能源科技有限公司 | A kind of preparation method of gypsum-based self-leveling material |
| CN109354471A (en) * | 2018-11-21 | 2019-02-19 | 君旺节能科技股份有限公司 | A kind of lower shrinkage self-compaction super hardening mending mortar and its construction technology |
| CN111592309A (en) * | 2019-04-29 | 2020-08-28 | 中建材创新科技研究院有限公司 | Heat-preservation gypsum self-leveling mortar and preparation method thereof |
| CN110357544A (en) * | 2019-07-15 | 2019-10-22 | 天津炬实科技发展股份有限公司 | A kind of upper flow regime cracking resistance early-strength repairing mortar and preparation method thereof |
| CN110590302A (en) * | 2019-10-10 | 2019-12-20 | 兰溪市昆仑工程材料有限公司 | Grouting plugging agent and preparation method thereof |
| CN110845206A (en) * | 2019-12-09 | 2020-02-28 | 成都宏基建材股份有限公司 | Cement millstone terrace material and production method thereof |
| CN111574171A (en) * | 2020-04-09 | 2020-08-25 | 张家港弗克新型建材有限公司 | Waterproof self-leveling mortar for surface layer and preparation method thereof |
| CN112266225A (en) * | 2020-11-03 | 2021-01-26 | 苏州恒祥环境工程有限公司 | Preparation method of extremely-fast-setting super-early-strength facade repair material |
| CN112592146A (en) * | 2021-01-12 | 2021-04-02 | 江苏顺丽成建筑新材料有限公司 | Self-leveling terrace repairing material |
| CN113698158A (en) * | 2021-06-16 | 2021-11-26 | 上海培宏公路养护技术有限公司 | Fast-hardening high-performance hinge joint filling material |
| CN116283082A (en) * | 2023-02-16 | 2023-06-23 | 中交四航工程研究院有限公司 | Self-leveling mortar and preparation method and application thereof |
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Application publication date: 20150722 |