CN102108027A - Cement mortar for constructional engineering - Google Patents
Cement mortar for constructional engineering Download PDFInfo
- Publication number
- CN102108027A CN102108027A CN 201110070540 CN201110070540A CN102108027A CN 102108027 A CN102108027 A CN 102108027A CN 201110070540 CN201110070540 CN 201110070540 CN 201110070540 A CN201110070540 A CN 201110070540A CN 102108027 A CN102108027 A CN 102108027A
- Authority
- CN
- China
- Prior art keywords
- cement
- sand
- accounts
- curing agent
- water
- 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.)
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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
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a cement mortar for constructional engineering. The cement mortar comprises a cement, yellow ground, a water-retaining and thickening agent, a plastic swelling agent, a concrete swelling agent and an internal curing agent. Because the plastic swelling agent forms a large amount of fine and uniform bubbles in the mortar, the plastic mortar swells; after the internal curing agent is mixed, innumberable mini-impounding reservoirs are built in the cement mortar; and when the mortar is in lack of water, the water in the internal curing agent can be slowly released so as to ensure the concrete and the swelling agent to continuously hydrate until the water is used up. Thus, long hydration time is provided for the swelling agent, and more swell crystal ettringites are generated, thereby reducing the dry shrinkage value of the cement mortar.
Description
Technical field
The present invention relates to a kind of architecture engineering material, relate in particular to a kind of have early-age plastic expansion character and the less construction work sand-cement slurry of later stage drying shrinkage value.
Background technology
The cement plaster mortar is the indispensable engineering materials of building masonry wall.Obtain a significant victory through materials for wall innovation for many years, the production and the use of clay brick placed restrictions in the whole nation, and a large amount of novel wall materials emerge in large numbers, as autoclave aerated concrete building block, concrete small size hollow building block and various light laths etc.These materials for wall performances are different, and masonry mortar is proposed higher requirement.Water-intake rate as autoclave aerated concrete building block is very big, and the water in the masonry mortar is sucked away very soon, and mortar produces bigger contraction.And the plasticity drying shrinkage of masonry mortar that uses in the construction work at present and motar is very big, and the drying shrinkage value in later stage is also very big.Such masonry mortar be used in novel wall material build by laying bricks or stones occur very easily that perps cracking, bonding are not firm, degradation defective under the masonry shearing resistance.Such motar is used in surface cracking also can occur on the novel wall material, play drum, and coat of plaster also can peel off when serious.
Summary of the invention
The invention provides a kind of plastic expansion performance that has, the construction work sand-cement slurry that the later stage drying shrinkage value is less.
Technical scheme of the present invention is: a kind of construction work sand-cement slurry, comprise cement, yellow ground and water-retaining admixture, and also be mixed with plastic expansion agent, cement expansive material.
Described plastic expansion agent is a spherical metal aluminium, and the mass percent that accounts for cement is 0.01～0.1%.
Described cement expansive material is a kind of sulplo-aluminate class, and the mass percent that accounts for cement is 8～12%.
Also include interior curing agent, curing agent is a kind of in organic high-strength absorbing material such as super-strong moisture absorbing resin sodium polyacrylate, graft bentonite water-absorbing material, the bentonite-high-molecular material composition or two kinds in described, and the mass percent that accounts for cement is 0.1～0.3%.
Curing agent or be porous satisfy a kind of of water light-weight aggregate such as pearlstone, expanded vermiculite or two kinds in described, the mass percent that accounts for cement is 3～8%.
Curing agent is that the full water light-weight aggregate of organic high-strength absorbing material and porous uses simultaneously in described, and the mass percent that described organic high-strength absorbing material accounts for cement is 0～0.1%, and the mass percent that the full water light-weight aggregate of described porous accounts for cement is 0～3%.
Construction work sand-cement slurry of the present invention has been mixed plastic expansion agent, sulplo-aluminate class swelling agent.Disperse owing to aluminum particle is tiny, in mortar, form a large amount of tiny and uniform bubble makes the mortar volume of plastic state produce expansion.In mixing behind the curing agent, the aquation generation in sand-cement slurry of sulplo-aluminate class swelling agent is the needle-like crystal of ettringite and is expanded, and interior curing agent builds up in sand-cement slurry countless " miniature water reservoirs ", when the mortar lack of water, water in the interior curing agent can slowly release, water supply mud and swelling agent continue aquation, only to using until exhausted.So just, produce more expansion crystal-ettringite, reduced the sand-cement slurry drying shrinkage value for swelling agent provides long hydration time.
Embodiment
During the test result of the embodiment of the invention and Comparative Examples is listed in the table below: (the base-material proportioning is: cement is 100 minutes, and yellow ground is 200 minutes, and the water-holding agent thickening is 0.15 minute, and slurry consistency is controlled at 60-70mm, and cement expansive material is UEA).
Construction work sand-cement slurry of the present invention, be in sand-cement slurry except that water-retaining admixture, also mixed spherical metal aluminium, UEA swelling agent and interior curing agent that aeroponics is produced.Aluminium powder expansion principle is such, is exactly that metallic aluminium is at alkalescence (Ca (OH)
2) under the condition and H
2Replacement(metathesis)reaction takes place and produces hydrogen in O, and chemical equation is as follows:
2Al+3Ca(OH)
2+6→C
3Al
2·6H
2O+3H
2↑
Disperse owing to aluminum particle is tiny, in mortar, form a large amount of tiny and uniform bubble makes the mortar volume of plastic state produce expansion.
Simultaneously, the aquation generation in sand-cement slurry of sulplo-aluminate class swelling agent is the needle-like crystal of ettringite and is expanded, and this ettringite generates needs a large amount of water, generates 1 mole of ettringite and will use 32 mole of water.And the cement plaster mortar spreads upon and has only 1～3cm thick on the wall, inhaled the branch that anhydrates by the body of wall base material below, surface wind solar evaporation moisture, self hydrated cementitious is also wanted water consumption, sand-cement slurry is in exsiccosis very soon, and the external world replenishes less than moisture again, and swelling agent stops aquation and also just can not expand, do not play compensate for shrinkage, so when using swelling agent, preferably will use simultaneously with interior curing agent.Behind the curing agent, build up countless " miniature water reservoirs " in sand-cement slurry in mixing, when the mortar lack of water, the water in the interior curing agent can slowly release, and water supply mud and swelling agent continue aquation, only to using until exhausted.So just, produce more expansion crystal-ettringite, reduced the sand-cement slurry drying shrinkage value for swelling agent provides long hydration time.
Claims (7)
1. a construction work sand-cement slurry comprises cement, yellow ground and water-retaining admixture, it is characterized in that, also is mixed with plastic expansion agent, cement expansive material.
2. sand-cement slurry according to claim 1 is characterized in that, described plastic expansion agent is a spherical metal aluminium, and the mass percent that accounts for cement is 0.01～0.1%.
3. sand-cement slurry according to claim 1 is characterized in that, described cement expansive material is a kind of sulplo-aluminate class, and the mass percent that accounts for cement is 8～12%.
4. sand-cement slurry according to claim 1 is characterized in that, also includes interior curing agent.
5. sand-cement slurry according to claim 4, it is characterized in that, curing agent is a kind of in organic high-strength absorbing material such as super-strong moisture absorbing resin sodium polyacrylate, graft bentonite water-absorbing material, the bentonite-high-molecular material composition or two kinds in described, and the mass percent that accounts for cement is 0.1～0.3%.
6. sand-cement slurry according to claim 4 is characterized in that, described in curing agent be a kind of of the full water light-weight aggregate of porous such as pearlstone, expanded vermiculite or two kinds, the mass percent that accounts for cement is 3～8%.
7. sand-cement slurry according to claim 4, it is characterized in that, curing agent is that the full water light-weight aggregate of organic high-strength absorbing material and porous uses simultaneously in described, the mass percent that described organic high-strength absorbing material accounts for cement is 0～0.1%, and the mass percent that the full water light-weight aggregate of described porous accounts for cement is 0～3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110070540 CN102108027A (en) | 2011-03-23 | 2011-03-23 | Cement mortar for constructional engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110070540 CN102108027A (en) | 2011-03-23 | 2011-03-23 | Cement mortar for constructional engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102108027A true CN102108027A (en) | 2011-06-29 |
Family
ID=44172321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110070540 Pending CN102108027A (en) | 2011-03-23 | 2011-03-23 | Cement mortar for constructional engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102108027A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103588446A (en) * | 2013-08-27 | 2014-02-19 | 包头市安顺新型建材有限责任公司 | Ecological type cement adhesive |
| CN105948651A (en) * | 2016-05-09 | 2016-09-21 | 河南省交通科学技术研究院有限公司 | High strength polymer cement mortar with self-curing function |
| WO2017067872A1 (en) * | 2015-10-21 | 2017-04-27 | Sika Technology Ag | Additive for internal post treatment of mineral binder compositions |
| CN107902996A (en) * | 2017-11-28 | 2018-04-13 | 王德元 | A kind of fast hard interior maintenance mortar |
| CN108395159A (en) * | 2018-03-02 | 2018-08-14 | 同济大学 | A kind of gunite concrete prepared using high hydroscopic resin and expanded vermiculite |
| CN108516718A (en) * | 2018-06-14 | 2018-09-11 | 江苏汉普顿新材料科技有限公司 | A kind of anti-cracking concrete enhancing additive and preparation method thereof |
| CN109553375A (en) * | 2018-12-29 | 2019-04-02 | 上海练定混凝土制品有限公司 | A kind of retarded concrete and its preparation process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1887781A (en) * | 2006-07-13 | 2007-01-03 | 内蒙古科技大学 | No-shrinkage grouting filler with adjustable performance |
| CN101195529A (en) * | 2007-12-17 | 2008-06-11 | 重庆大学 | Heat preserving crack resistant mortar for exterior wall |
| CN101891440A (en) * | 2010-07-23 | 2010-11-24 | 同济大学 | Special finish coat mortar with desulfurized gypsum as base material for wall insulation system |
-
2011
- 2011-03-23 CN CN 201110070540 patent/CN102108027A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1887781A (en) * | 2006-07-13 | 2007-01-03 | 内蒙古科技大学 | No-shrinkage grouting filler with adjustable performance |
| CN101195529A (en) * | 2007-12-17 | 2008-06-11 | 重庆大学 | Heat preserving crack resistant mortar for exterior wall |
| CN101891440A (en) * | 2010-07-23 | 2010-11-24 | 同济大学 | Special finish coat mortar with desulfurized gypsum as base material for wall insulation system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103588446A (en) * | 2013-08-27 | 2014-02-19 | 包头市安顺新型建材有限责任公司 | Ecological type cement adhesive |
| WO2017067872A1 (en) * | 2015-10-21 | 2017-04-27 | Sika Technology Ag | Additive for internal post treatment of mineral binder compositions |
| CN108349809A (en) * | 2015-10-21 | 2018-07-31 | Sika技术股份公司 | The adulterating agent of internal post-processing is carried out to mineral binder composition |
| AU2016341065B2 (en) * | 2015-10-21 | 2020-08-27 | Sika Technology Ag | Additive for internal post treatment of mineral binder compositions |
| US11161791B2 (en) | 2015-10-21 | 2021-11-02 | Sika Technology Ag | Additive for internal post treatment of mineral binder compositions |
| CN105948651A (en) * | 2016-05-09 | 2016-09-21 | 河南省交通科学技术研究院有限公司 | High strength polymer cement mortar with self-curing function |
| CN107902996A (en) * | 2017-11-28 | 2018-04-13 | 王德元 | A kind of fast hard interior maintenance mortar |
| CN108395159A (en) * | 2018-03-02 | 2018-08-14 | 同济大学 | A kind of gunite concrete prepared using high hydroscopic resin and expanded vermiculite |
| CN108516718A (en) * | 2018-06-14 | 2018-09-11 | 江苏汉普顿新材料科技有限公司 | A kind of anti-cracking concrete enhancing additive and preparation method thereof |
| CN109553375A (en) * | 2018-12-29 | 2019-04-02 | 上海练定混凝土制品有限公司 | A kind of retarded concrete and its preparation process |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20110629 |